How to solve the sudden failure of the ball mill

Ball mill equipment is the equipment that accounts for a considerable investment in the entire concentrator, accounting for more than 50%. Therefore, ensuring the normal operation of the ball mill is a necessary condition to ensure the normal production of the entire concentrator. However, when the ball mill is in use, some sudden failures often occur, which affects production efficiency. So how to effectively solve or avoid these sudden failures?

Sudden failures of ball mills are generally caused by multiple reasons such as long-term high-speed operation and improper operation.

  1. The stator coil of the ball mill is broken down

In the entire system of the ball mill, there will be iron-containing dust in the air around the material. After a long time of operation, the iron-containing dust will adhere to the coil of the ball mill stator. When it reaches a certain thickness, it will cause the surface of the stator coil. A short-circuit discharge situation has occurred. When the short-circuit phenomenon occurs many times, the insulator of the coil will be damaged, causing the phenomenon of sparking and breakdown, causing the ball mill to stop running. Without a backup motor, the grinding work is difficult to continue. At this point, the breakdown coil should be cut off immediately, scientific protection measures should be adopted, and the ball mill can be restarted to continue production.

  1. The sliding shaft of the ball mill is scratched

After the sliding shaft of the ball mill has been worn for a long time and reaches a certain thickness, it is difficult to combine the spherical body of the ball mill with the tile lining, and scratches will occur. Generally, this kind of situation occurs because the clinker temperature of the hollow shaft is too high, and the temperature of the outer surface of the hollow shaft is also high, which causes the lubricating oil to be too diluted, loses viscosity, and is difficult to form a good oil film, resulting in bushings and journals. Friction generates heat and heats up rapidly, causing the surface of the tile lining to be melted and scratched.

If there is no spare spherical tile-hour, you can only stop the machine for inspection and repair the tile surface before continuing to use it. The smoothness of the scratched surface can be restored by frustrating, cutting, grinding, etc., while the undamaged part needs to be scraped out of a micro oil groove to repair the tile. And unload the materials and grinding media in the ball mill, and use manual methods to rotate the barrel for no-load grinding. When it reaches a certain level, it will run in conjunction with the transmission part for a no-load test, and then load the materials and grinding media into the ball mill for load operation, so that the ball mill can return to normal operation.

  1. The barrel screw and hollow shaft of the ball mill are broken

In the process of connecting the cylinder body and the hollow shaft of the ball mill, the cylinder body needs to be drilled through holes with the flange, and the pins are connected through the turnbuckles. The through holes only need ordinary screws to connect. The reamed holes are mainly used for limiting and Positioning role.

After long-term operation of the ball mill, due to thermal expansion and contraction, distortion, high temperature corrosion, water vapor corrosion, etc., the matching size of the pin hole and the reamed hole will change, and the phenomenon of looseness will occur, which makes it difficult to achieve position limitation. Because of the twisting, the screw starts to loosen, causing the cylinder and the hollow shaft to periodically displace. If the screw is stretched for a long time, the screw will break.

According to many years of experience, after this kind of failure occurs, the screw can be changed to a hinge pin for connection. At present, there has been no phenomenon of hinge pin fracture.

  1. The temperature rise of the sliding bearing of the ball mill

During the operation of the ball mill, the base part of its head slides and the temperature of the bearing suddenly rises. This phenomenon is mostly caused by the sinking of the base part of the head, the overall movement of the grinding body and the tilting. The spherical bush shoulder of the ball mill and the flange root of the hollow shaft undergo squeezing contact and rotating friction, which generates heat and causes the temperature to rise rapidly. high. This situation may cause the ball mill to tilt. The meshing of the large ring gear and the pinion gear will form an axial angle, which will cut the teeth each other, which will increase the difficulty of meshing, cause loud noise and increase the vibration, and will cause the ball mill to stop in severe cases.

After this phenomenon occurs, it is necessary to stop the machine for inspection, weld and lengthen the grounding bolts, wedge the shim iron, raise the bearing seat, and control the temperature of the sliding bearing and the sound of the transmission part.

by ALPA Powder

Wide range of product applications for air classifiers

Features of Air Classifier:

1.   Large output, low energy consumption and high grading efficiency.

2.  Concentration of particle size: The machine uses an original vertical impeller for classification. The stable classification technology and special sealing measures effectively prevent the leakage of coarse particles, so that the product has no large particles, centralized particle size and high classification accuracy.

3.  Reasonable structure: products with 1-6 particle sizes can be produced at the same time according to user requirements.

4.  Strong applicability: It can be combined with various mills (jet mill, mechanical mill, ball mill, Raymond mill, vibration mill, etc.) to form a closed-circuit or open-circuit combined operation.

5.  High degree of automation.

Working principle of air classifier:

Qualified fine powder is carried by the updraft into the turbo classifier above the fluidized bed. The classifier classifies qualified materials and enters the cyclone collector (if products with several particle sizes are required, multiple vertical turbines are added Classifier). The finer tail material is carried by the airflow into the bag filter. After being filtered by the bag, the tail material enters the discharge port at the lower part of the dust collector, and the pure air is emptied.

The main components of the machine: the standard configuration is a vertical turbine classifier. The crushing and classification are coordinated and completed synchronously. The speed of the classifier can be adjusted by frequency conversion, and the product fineness can be adjusted arbitrarily. If a processing process requires products with multiple granularities, two to four can be installed on the basis of a standard classifier to make this machine a two-connected-five-connected crushing and grading machine.

Application range: The crushing mechanism of this machine determines its wide application range and high fineness of the finished product. Typical materials include: superhard diamond, silicon carbide, metal powder, etc., high purity requirements: ceramic pigments, medicine, biochemical Etc. Low temperature requirements: medicine, PVC. By changing the ordinary air in the air source to inert gases such as nitrogen and carbon dioxide, the machine can be used as an inert gas protection device, suitable for the crushing and classification of inflammable, explosive, and oxidizable materials.

Airflow classifier product application:

1.   High hardness materials: silicon carbide, various corundum, boron carbide, alumina, zirconia, garnet, zircon sand, diamond, etc.

2.  Non-metallic minerals: quartz, graphite, kaolin, calcium carbonate, mica, barite, mullite, medical stone, wollastonite, talc, pyrophyllite, etc.

3.  Chemical industry: aluminum hydroxide, silica gel, various dyes, epoxy resin, various additives, etc.

4.  Food and medicine: pollen, hawthorn, pearl powder, Ganoderma lucidum, various vegetable powder, various Chinese herbal medicines, various health products, cosmetics, antibiotics, etc.

5.  Metal materials: aluminum powder, magnesium powder, zinc powder, tin powder, copper powder, etc.

6.  Other materials: ceramic materials, refractory materials, electronic materials, magnetic materials, rare earth materials, phosphors, copy material powders, etc.

by ALPA Powder

Ultra-fine grinder operating instructions & output & fineness adjustment methods

Ultra-fine grinder is a kind of fine powder and ultra-fine powder grinding and processing equipment. This equipment is mainly suitable for non-flammable and explosive non-metallic materials with medium and low hardness, humidity less than 6%, and Mohs hardness below 9 .

  1. Operation instructions

(1) Turn on sequence ---- turn on the auxiliary equipment first (high-voltage extension, high square screen, pulse dust collector, wind shutoff, screw auger, scraper and hoist).

(2) Open the host supporting equipment (grading wheel, host, feeder). Remarks: Before turning on the feeder, the frequency of the grading wheel must be set first. The purpose is to prevent the grinding material from being too coarse or too fine.

  1. Fineness adjustment method

(1) Under normal working conditions, the factors that affect the fineness are the air volume, the speed of the grading wheel and the feeding volume, and the degree of wear of the wearing parts.

(2) When the fineness is too thick: if the air volume is the maximum, first reduce the feed volume, and then increase the frequency of the grading wheel; if it still does not meet the requirements, turn off the small air volume (butterfly valve on the high-pressure air pipe). Such repeated adjustments to find and meet the fineness requirements are the control points for the best yield.

(3) When the fineness is too fine: first increase the air volume, if the air volume is the largest, reduce the frequency of the grading wheel and increase the feeding volume after the current drops. Such repeated adjustments to find and meet the fineness requirements are the control points for the best yield.

(4) If low-grade feed is produced, the requirement for fineness is not high, and when only the output is pursued, the air volume should be maximized, the frequency of the grading wheel should be reduced, and the feed volume should be increased.

  1. Wearable parts and names that affect output and fineness

(1) Hammer: After the material enters the grinding chamber, the hammer is mainly used to make the material thinner. Severe wear of the hammer head will result in a decrease in output and fineness, uneven wear and increase in vibration, which will affect the service life of the main engine bearing.

(2) Ring gear: After being hit by the hammer, the material will bounce back to the ring gear, forming a second hit, and the crushing requirements can only be reached after repeated such repetition. The wear of the ring gear will greatly affect the output and fineness.

(3) Wear plate: Wear plate is the most easily worn object. Wear plate is an important part to protect the active disk. Excessive wear of the wear plate will increase the vibration and affect the service life of the main engine bearing. After being worn through, the active disc will be directly worn, which will increase the cost of accessories and cause the equipment to operate in a dangerous state.

(4) Shunt cover: After the shunt cover is worn, it will change the flow direction of the airflow in the crushing chamber, causing the fineness of the material to fail to meet the requirements.

(5) Active disk: The wear of the active disk (replacement of the wear plate in time will effectively protect the active disk) will cause vibration and affect the service life of the host bearing.

by ALPA Powder

How to solve the problem of excessive dust when the jet mill is working

The jet mill, cyclone separator, dust collector, and induced draft fan constitute a complete pulverization system. After the compressed air is filtered and dried, it is sprayed into the crushing chamber at high speed through the Laval nozzle. At the intersection of multiple high-pressure airflows, the materials are repeatedly collided, rubbed, and sheared to be crushed. The crushed materials rise with the suction of the fan. The air flow moves to the classification zone, and the coarse and fine materials are separated under the strong centrifugal force generated by the high-speed rotating classification turbine. The fine particles that meet the particle size requirements enter the cyclone separator and dust collector through the classification wheel for collection, and the coarse particles descend to the grinding zone to continue grinding .

Sometimes the difference in operation mode and settings will make the crusher's crushing effect poor. Whether it is to increase the speed of the extension or set the parameters, it will not achieve good results. So what to do in this situation, let me tell you about it below. Ways to improve the crushing effect.

To increase the feed rate, the principle of airflow pulverization mainly relies on the high-speed airflow to cause strong collisions between the material and the material, and the material and the inner wall to achieve the pulverization effect. If the feed is too little, the purpose of frequent and strong collisions cannot be achieved, so that the strength cannot be lowered. In addition, if the fan damper is too large, the internal negative pressure will be too large and the collision will be reduced; on the contrary, the positive pressure is not good.

The jet mill is used to crush materials, so the crushed materials and tailings must be discharged in time. When the crusher discharges these crushed materials, there will be dust. So how to solve if the dust is too large?

  1. Install the dust collector: Generally, this type of dust collector can be used with a grinder. It collects the dust in the collection bag, and the dust is filtered and discharged from the dust box through the cloth bag;
  2. The cloth bag is dustproof: the cloth bag is tightly tied to the powder outlet of the machine to prevent air leakage and powder leakage. Attention should be paid during operation: the powder outlet should be blocked when parking, and the dust should be cleaned up in time.
  3. Dust removal by wood shower or pool: Mainly use a ventilator to vacuum to the outside of the grinding room, and then use a spray to vacuum, or use a pool to vacuum, etc.

The above three dust removal methods can achieve good dust removal effects and can solve the problem of excessive dust. Generally, these dust removal devices are installed before work to prevent excessive dust.

by ALPA Powder

What are the factors that affect the output and quality of the ball mill?

The beneficiation stage is mainly divided into three stages: pre-selection, separation and post-selection. Grinding is in the pre-selection stage. Therefore, the output of the ball mill has a certain degree of influence on the mineral separation effect, and even the recovery rate and concentrate grade. Therefore, how to ensure the output of the ball mill has become a topic of concern, so what are the reasons that affect the output of the ball mill?

  1. Raw material size

The particle size of the raw material affects the output and quality of the ball mill. If the particle size is small, the output and quality of the ball mill will be high, and the power consumption will be low; if the particle size is large, the output and quality of the mill will be low, and the power consumption will be high.

  1. Material ease of grinding

The grindability of the material refers to the degree of difficulty of the material in the grinding process. According to the national standard, the grindability index wi (kWh / T) is adopted. The smaller the value, the better the grind, otherwise the harder it is to grind.

  1. The water content of the material to be ground

The grinding of the ball mill can be divided into two methods: dry and wet. For dry milling, the water content of the abrasive has a great influence on the output and quality of the mill. The higher the water content of the abrasive material, the more likely it is to cause full grinding or paste grinding, reducing the grinding efficiency, and the lower the output of the grinding machine. Therefore, materials with higher moisture must be dried before grinding.

  1. Feed temperature

If the temperature of the material entering the mill is too high, the impact friction of the grinding body will be generated. If the temperature in the mill is too high, the ball will stick, which will reduce the grinding efficiency of the mill and affect the output of the mill. At the same time, the thermal expansion of the rolling mill barrel affects the long-term safe operation of the rolling mill. Therefore, it is necessary to strictly control the temperature of the material being ground.

  1. The fineness requirements of the grinding material

The finer the requirements for fineness, the lower the output, and vice versa, the higher the output. In some areas, excessive emphasis on fineness does not meet the requirements of economic production. For example, in the cement industry, actual production shows that when the product fineness is in the range of 5-10%, the fineness is reduced by 2%, and the output will be reduced by 5%. When the fineness is controlled below 5%, the output of the mill will decrease even more. Therefore, choosing the right product fineness is also an important factor to improve the output and quality of the ball mill.

  1. Grinding process

For ball mills of the same specifications, the closed-circuit process can increase the output by 15-20% compared with the open-circuit process; in closed-circuit operation, selecting the appropriate separation efficiency and cycle load rate is an important factor in increasing the output of the mill.

  1. Powder selection efficiency

The sorting efficiency of the closed-circuit crusher has a great influence on the output of the crusher. Generally speaking, the efficiency of the classifier is higher, which can improve the grinding efficiency of the mill. However, the classifier itself cannot play the role of grinding, so the function of the classifier must be combined with the grinding function of the grinder to increase the output of the grinder. Production practice shows that the efficiency of the one-stage closed-circuit long grinding separator is generally controlled at 50 ~ 80%. The ideal separation efficiency should be determined through multiple experiments.

  1. Cycle load rate

Circulation load rate refers to the ratio of recycled powder (coarse powder) to finished product. In order to improve the grinding efficiency of the mill and reduce the phenomenon of over-grinding in the mill, the cycle load rate should be appropriately increased. However, if the circulating load rate is increased to a very high level, there will be too much material in the mill, thereby reducing the grinding efficiency.

  1. Add grinding aid

Some grinding aids will affect the grinding effect, because most of the organic substances of commonly used grinding aids have strong surface activity, which can accelerate the crack propagation of the material and reduce the amount of fine powder during the grinding process of the adsorbed material on the surface of the material. The mutual combination between the two improves the grinding efficiency, which is conducive to the energy-saving and high-yield of the ball mill.

  1. Ball to material ratio

The ball-to-material ratio is the ratio of the mass of the grinding body to the mass of the material. If the ball-to-battery ratio is too large, it will increase the useless work loss of the impact friction between the grinding body and the liner, increase power consumption and reduce output. How to choose the ball-to-battery ratio and ball-to-battery ratio of the ball mill is a common problem in actual production.

In addition to process factors, the model, parameters, and the work of production and maintenance personnel also affect the production and quality of the ball mill. The energy-saving and high-yield ball mill is a systematic project, and each link is interrelated and restricts each other. Only comprehensive consideration and close cooperation can achieve better energy-saving and high-yield effects.

by ALPA Powder

How to deal with the blockage of jet mill

There are many grinders in our daily life, such as small grinders, Chinese medicine grinders, jet grinders, and so on. But in the process of use, sometimes there will be some failures, sometimes the grinder is blocked, when it is blocked, how should we deal with it? In fact, clogging is a very common failure of the grinder during grinding, and the main reason is still caused by the operation.

1.   The feeding speed is too fast and the load increases, causing blockage. During the feeding process, you should always pay attention to the large deflection angle of the ammeter pointer. If it exceeds the rated current, it indicates that the motor is overloaded, and the motor will be burnt if overloaded for a long time. In this case, the feed door should be reduced or closed immediately, or the feeding method can be changed, and the feed amount can be controlled by increasing the feeder. There are two types of feeders: manual and automatic. The user should choose the appropriate feeder according to the actual situation. Due to the high speed of the grinder, the large load, and the strong fluctuation of the load. Therefore, the current when the grinder is working is generally controlled at about 85% of the rated current.

2.  The discharging pipeline is not smooth or blocked and the feed is too fast, which will block the tuyere of the grinder; improper matching with the conveying equipment will cause the discharging pipeline to weaken or become blocked after no wind. After the fault is detected, the unmatched conveying equipment should be cleared first, and the feeding amount should be adjusted to make the equipment operate normally.

3.  The broken or aging of the hammer, the closed or broken screen mesh, and the high water content of the ground material will cause the grinder to be blocked. The broken and severely aged hammers should be updated regularly, the grinder should be kept in good working condition, and the screen should be checked regularly. The water content of the ground material should be less than 14%, which can improve production efficiency, prevent the grinder from clogging, and enhance the reliability of the grinder.

These are the ways to deal with the clogging of the grinder. It is very common for the machine to malfunction. The most important thing is that we must know the way to solve the problem. This is a factor that makes the grinder longer service life. In addition, maintaining the machine is also very important.

by ALPA Powder

Common problems of ball mills and solutions to failures

1.   When the ball mill is running, there is a regular percussive sound, and the sound is loud. When the ball mill rotates, the liner hits the grinding cylinder of the ball mill. Judge the position of the liner of the ball mill according to the sound, find out the loose bolts and tighten them separately.

2.  The temperature of the bearings of the ball mill and the motor has risen, exceeding the requirements. Try to feel the bearing by hand. If the temperature is too high, check and handle the ball mill from the following points.

(1) Check the lubrication points of each part of the ball mill, and check whether the brand of lubricating oil used is consistent with the factory instructions.

(2) Check whether the lubricating oil and grease of the ball mill have deteriorated.

(3) Check whether the lubrication pipeline of the ball mill is blocked, or the lubricating oil does not directly enter the lubrication point, and the insufficient amount of oil causes heat.

(4) The side clearance of the bearing bush of the ball mill is too small, the clearance between the bearing bush and the shaft is too large, and there are too many contact points, forming a uniform oil film on the bearing bush.

(5) Too much or too little grease in the rolling bearing of the ball mill will form rolling elements. Stirring the grease will generate heat, and the heat is not easy to disperse. If the lubrication is too little or poor, add enough oil according to the regulations, generally 1/3 ~ 1/2 of the bearing clearance.

(6) The sealing device of the hollow shaft at both ends of the ball mill body is too tight, or the iron part of the sealing body is in direct contact with the shaft.

The above problems should be dealt with in an appropriate way. Only when the side clearance of the bearing bush is too small or the bottom contact angle is too big, an oil jack must be used to lift the grinding cylinder, and the bearing bush should be drawn out from one side of the shaft and scraped separately.

3.  The bearing of the reducer of the ball mill is overheated: In addition to checking the temperature rise of the bearing of the ball mill, check whether the vent of the reducer is blocked and clear the vent.

4.  The ball mill motor produces vibration after starting, the main reasons are as follows:

(1) The gap between the two wheels of the ball mill coupling is too small to compensate for the displacement caused by the self-seeking core when the motor is started.

(2) The alignment method of the ball mill coupling is incorrect, which causes the two shafts to be misaligned.

(3) The coupling bolts of the ball mill are tightened asymmetrically, and the tightening force is different.

(4) The outer ring of the ball mill bearing moves.

Treatment method: Adjust the gap between the two wheels as required to make the two shafts concentric. Tighten the coupling bolts symmetrically with the same torque.

When the rotor is unbalanced, the ball mill rotor should be pulled out for static balance.

5.  The ball mill reducer drives the ball mill to produce greater vibration

(1) The balance shaft of the ball mill and the reducer is not in a straight line

When the mill was installed with the liner, the secondary grouting was not carried out, or the anchor bolts were not tightened after the secondary grouting. Rotating the mill barrel with a hoist causes one end of the mill barrel to shift, and the two shafts are not in a straight line. The reducer drives the mill to cause vibration.

Treatment method: readjust so that the axis of the ball mill and the axis of the reducer are on the same plane axis.

(2) Large-scale ball mills are bulky and heavy, causing the foundation to sink and shift. Set up a settlement monitoring point next to the foundation, observe and adjust when the settlement is found.

6.  Abnormal running sound of ball mill reducer:

The normal operation sound of the ball mill reducer should be uniform and stable. If there is a slight knocking sound or hoarse friction sound on the gear, there is no obvious change during operation, you can continue to observe, find out the cause, and stop the ball mill for processing. If the sound becomes louder, stop the ball mill inspection immediately.

by ALPA Powder

What are the irreplaceable functions of the jet mill

Jet mills are widely used in chemical, mineral, metallurgy, abrasives, ceramics, refractory materials, medicine, pesticides, food, health products, new materials and other industries. The reason why it is chosen as the factory production equipment is that the jet mill does have an irreplaceable role.

The working principle of the jet mill: Qualified fine powder is brought into the turbo classifier on the upper part of the fluidized bed by the updraft, and the qualified materials are classified by the jet mill and enter the cyclone collector. A vertical turbine classifier). The finer tailings are brought into the bag filter by the airflow, and after being filtered by the bag filter, the tailings enter the discharge port at the lower part of the filter, and the pure air is evacuated.

The main components of the machine: standard vertical turbine classifier, grinding and classifying are coordinated and completed simultaneously. The speed of the powder concentrator can be adjusted by frequency conversion, and the fineness of the product can be adjusted arbitrarily. For example, if a processing process requires products with multiple particle sizes, you can add two to four more than one classifier as the standard, so that the machine becomes a two-machine five-machine for grinding and classification.

Scope of application: The grinding mechanism of the jet mill determines its wide application range, with high fineness and high purity of the finished product. Typical materials include superhard diamond, silicon carbide, metal powder, ceramic pigments, medicine, biochemistry, etc. By changing the ordinary air in the gas source into inert gases such as nitrogen and carbon dioxide, the machine can be used as an inert gas protection device, suitable for the grinding and classification of flammable, explosive, and oxidizing materials.

Application of jet mill:

  1. High hardness materials: silicon carbide, various corundum, boron carbide, alumina, zirconia, garnet, zircon sand, diamond, etc.
  2. Non-metallic minerals: timing, graphite, kaolin, calcium carbonate, mica, barite, mullite, medical stone, wollastonite, talc, pyrophyllite, etc.
  3. Chemical industry: aluminum hydroxide, silica gel, various dyes, epoxy resins, various additives, etc.
  4. Food and medicine: pollen, hawthorn, pearl powder, Ganoderma lucidum, various vegetable powder, various Chinese herbal medicine, various health products, cosmetics, antibiotics, etc.
  5. Metal materials: aluminum powder, magnesium powder, zinc powder, tin powder, copper powder, etc.
  6. Other materials: ceramic materials, refractory materials, electronic materials, magnetic materials, rare earth materials, phosphors, copy material powders, etc.

Features of air classifier:

  1. Large output, low energy consumption and high classification efficiency.
  2. Concentrated particle size: This machine uses the original vertical impeller for classification. The stable classification technology and special sealing measures effectively prevent the leakage of particles, so that the product has no large particles, the particle size is concentrated, and the classification accuracy is high.
  3. Reasonable structure: products with 1-6 granularities can be produced at the same time according to user requirements.
  4. Strong applicability: It can be combined with various mills (jet mill, mechanical mill, ball mill, Raymond mill, vibration mill, etc.) to form a closed-circuit or open-circuit joint operation.
  5. High degree of automation.

by ALPA Powder

Preparation and inspection of the superfine grinder before use

Jet mills use high-speed airflow to perform ultra-fine grinding of materials. At present, there are five types in the industry, which can be divided into horizontal disc (flat) jet mills, circulating tube jet mills, target jet mills, reverse jet mills and fluidized bed jet mill. The ultra-fine grinder uses air separation, heavy pressure grinding, and shearing to achieve ultra-fine grinding of dry materials. It is composed of cylindrical grinding chamber, grinding wheel, grinding rail, fan, material collection system and so on.

The inspection items before preparation and use are as follows:

1.   Check the grinder and grading system to check whether there are metal objects and debris in the grinding room;

2.  Check whether there are metal objects and sundries in the feeding hopper and feeding screw of the superfine grinder;

3.  Check whether the ultra-fine grinder tightens the fasteners;

4.  Whether the elasticity of the transmission belt of the ultra-fine grinder is moderate, and whether the protective cover has been installed;

5.  Check the collision of the transmission parts, if there is any abnormality, analyze the reason and eliminate it in time;

6.  Turn the transmission parts to see if there is any abnormality, then move the parts to check whether the operation direction is correct;

7.  Run the ultra-micro grinding machine without load for 20-30 minutes, and observe the working current, temperature and vibration: the temperature rise of the spindle bearing should not exceed 35℃, and the highest target temperature should not exceed 70℃ (in different environments, the temperature is generally not more than 40 ℃); The vibration amplitude of machinery and equipment should not be too large. It can be put into production after normal no-load operation;

8.  The superfine grinding machine should properly open the upper and lower air doors of the gravity dust collector room.

by ALPA Powder

The application of ultra-fine grinding machine in the pharmaceutical industry

The medical ultra-fine grinder used in the development of medical resources can produce micron-level powder, which can destroy the structure of the tissue cell wall and obtain the required material characteristics.

The medical ultra-micro grinder uses compressed air to be cooled, filtered, and dried. The nozzle forms a supersonic airflow and is injected into the crushing cavity. The material is fluidized under the action of pressure difference. The accelerated material is at the intersection of multiple nozzles. Converge, produce fierce impact, collision, friction, and shear to achieve ultra-fine grinding of particles, which can be used to produce various micron-level powders. The medical ultra-fine grinder is used for ultra-fine pulverization and wall-breaking processing of various types of medicine; improvement of drug solubility; ingenious confusion and evacuation of compound drugs; manufacture of film ointment, etc.

The scope of use is:

Chinese herbal medicine: Typical materials include American ginseng, ginseng, Ganoderma lucidum, pearls and other valuable materials and pollen, hawthorn, shiitake mushrooms, pearl powder, gallnut, multiflorum multiflorum, Andrographis paniculata, mint, houttuynia cordata, fern root, kudzu root, dry alum, yam, white peony root , Lotus leaf, white tuckahoe, Tianqi, Angelica dahurica, honeysuckle, cordyceps, saffron, cuttlefish, fumarole, Radix isatidis, etc.

Western medicine: Typical materials include stomach medicine, nimodipine, antibiotic medicine, contrast medicine, etc.

  1. The medical ultra-fine grinderis small in size, light in weight and easy to operate.
  2. The medical ultra-fine grinderhas low vibration and impact and low noise.
  3. The medical ultra-fine grinderhas high frequency, large amplitude and high efficiency. The discharging granularity is fine and the distribution is even.
  4. The medical ultra-fine grinderis equipped with unique feeding and discharging ports, which is convenient for dust-free collection.
  5. Intermittent sealed grinding of pharmaceutical ultra-fine grinder may also be continuous open-circuit grinding.
  6. The medical ultra-fine grinderis easy to clean. The grinding drum can be removed and opened to facilitate cleaning and disinfection without leaving dirt.
  7. The grinding cylinder of the medical ultra-fine grinderis made of stainless steel. The ultra-fine grinderuses air separation, heavy pressure grinding, and shearing to achieve ultra-fine grinding of dry materials. It is composed of cylindrical crushing chamber, grinding wheel, grinding rail, fan, material collection system and so on. The jet mill uses high-speed airflow to superfinely grind materials to ensure no wear and pollution.

Selection of medical crusher equipment:

According to the physical characteristics of medicine, two kinds of equipment are used for grinding processing. For sugar-free and oil-free products, the grading impact mill (effectively reducing the energy consumption of production equipment) can achieve the grinding effect; for sugar-containing and oily products, use a fluidized-bed jet mill (low crushing temperature) , Oiliness and sugar will not melt during ultra-fine grinding, resulting in adhesion of equipment) for grinding processing.

by ALPA Powder