[Ball mill + air classifier] This configuration is very cost-effective
At present, due to the increase in the price of raw materials and the decline in the price of finished products, the first element that many non-mining manufacturers consider before production is to control costs. Among the many grinding schemes, the configuration of “Ball Mill + Air Classifier” is very cost-effective, so it is widely praised. Let me introduce the specific reasons. The advantage analysis of this combination can be divided into three parts: “drying, ball milling, and grading”.
- Drying
Drying is easy to be overlooked in the introduction of the production line, but it is also very important. This is because the raw ore contains 10-15% moisture. If it is not dried before the grinding process, the ground material will easily agglomerate and affect subsequent production.
In terms of matching, a three-cylinder dryer is generally used. Since the metal steel plate conducts heat faster than the material being dried, the steel plate and the lifting plate of the cylinder body are heated first, and then the heat is transferred to the material by conduction and radiation. The temperature rises after being heated, and the water vapor is separated from the material and discharged into the atmosphere along with the smoke and dust after passing through the dust removal equipment. In order to get a better drying effect, it will also be matched with a metering speed control scale to achieve the purpose of uniform feeding and improve the drying efficiency.
Ball mills are currently one of the most widely used grinding machines. Because of their excellent production and good grinding capabilities, they are quite popular in the non-mining field. However, in order to be “cost-effective”, there are still a lot of knowledge in the ball mill. For example, a reasonable ratio of grinding media-as the grinding progresses, the particle size distribution continues to decrease, and the crushing force required for particle grinding is also changing. When the particle size reaches a certain fineness range, the crushing method will be thrown off. The main impact crushing gradually changes to the main grinding crushing. Therefore, in order to make the grinding medium ball in the ball mill meet the requirements of impact and grinding, it is necessary to perform “grading”, and use a larger grinding medium ball with a smaller grinding medium ball to achieve a better grinding effect. .
Improving the efficiency of media grinding materials is equivalent to saving energy. However, the specific ratio of grinding media must be determined according to actual production conditions. Generally speaking, the ball mill is fully capable of grinding 325-2000 mesh materials.
- Grading
In the grinding process, often only part of the powder meets the particle size requirements. If the products that have reached the requirements are not separated in time, it will cause energy waste and over-grinding of some products. In addition, after the particles are refined to a certain degree, the phenomenon of grinding and agglomeration occurs, and even the agglomeration of the particles becomes larger and the grinding process is deteriorated. For this reason, products should be classified during the preparation of ultrafine powders to improve grinding efficiency and reduce energy consumption.
The air classifier has the advantages of low cost, convenient and easy operation, and can be matched with various mechanical grinding equipment to form a micro powder processing production line. In order to enhance the performance of the classifier, the various components of the classifier can also be optimized.
Based on the above, through reasonable matching and optimization, the “Ball Mill + Air Classifier Production Line” can achieve low investment, low unit energy consumption, high fine powder content in the finished product, and stable equipment operation, effectively helping customers save investment And operating costs, increase product profits, are called “high cost-effective” products in the non-mining field.