{"id":99240,"date":"2020-10-12T14:51:23","date_gmt":"2020-10-12T06:51:23","guid":{"rendered":"https:\/\/www.alpapowder.com\/99240\/"},"modified":"2021-08-10T10:34:28","modified_gmt":"2021-08-10T02:34:28","slug":"%e3%80%90phan-tich-ky-thuat%e3%80%91-lam-the-nao-de-chon-bot-ngot-cong-nghiep-canxi-cacbonat-su-khac-biet-giua-canxi-nang-va-canxi-nhe-la-gi","status":"publish","type":"post","link":"https:\/\/www.alpapowder.com\/vi\/99240\/","title":{"rendered":"\u3010Ph\u00e2n t\u00edch k\u1ef9 thu\u1eadt\u3011 L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ch\u1ecdn \u201cb\u1ed9t ng\u1ecdt c\u00f4ng nghi\u1ec7p\u201d canxi cacbonat? S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa \u201ccanxi n\u1eb7ng\u201d v\u00e0 \u201ccanxi nh\u1eb9\u201d l\u00e0 g\u00ec?"},"content":{"rendered":"

Canxi cacbonat l\u00e0 m\u1ed9t kho\u00e1ng ch\u1ea5t mu\u1ed1i v\u00f4 c\u01a1 quan tr\u1ecdng v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cb\u1ed9t ng\u1ecdt c\u00f4ng nghi\u1ec7p\u201d, l\u00e0 m\u1ed9t trong nh\u1eefng ch\u1ea5t \u0111\u1ed9n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong m\u1ecdi t\u1ea7ng l\u1edbp x\u00e3 h\u1ed9i. Canxi cacbonat kh\u00f4ng ch\u1ec9 c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m chi ph\u00ed nguy\u00ean li\u1ec7u c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m cao su v\u00e0 nh\u1ef1a m\u00e0 c\u00f2n c\u1ea3i thi\u1ec7n m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t c\u1ee7a nguy\u00ean li\u1ec7u cao su v\u00e0 nh\u1ef1a. C\u00e1c lo\u1ea1i canxi cacbonat kh\u00e1c nhau c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u cao su v\u00e0 nh\u1ef1a khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u00fang c\u00e1ch. Theo quy tr\u00ecnh s\u1ea3n xu\u1ea5t kh\u00e1c nhau, canxi cacbonat c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh canxi cacbonat n\u1eb7ng v\u00e0 canxi cacbonat nh\u1eb9.<\/p>\n

1. S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa canxi cacbonat n\u1eb7ng v\u00e0 canxi cacbonat nh\u1eb9 l\u00e0 g\u00ec?<\/strong><\/p>\n

Canxi cacbonat n\u1eb7ng v\u00e0 canxi cacbonat nh\u1eb9 c\u00f3 vai tr\u00f2 t\u01b0\u01a1ng \u1ee9ng trong ng\u00e0nh c\u00f4ng nghi\u1ec7p cao su v\u00e0 nh\u1ef1a. T\u1eeb quan \u0111i\u1ec3m h\u1ecdc thu\u1eadt, c\u00f3 nhi\u1ec1u \u0111i\u1ec3m kh\u00e1c bi\u1ec7t gi\u1eefa ch\u00fang, ch\u1eb3ng h\u1ea1n nh\u01b0 ngu\u1ed3n g\u1ed1c, m\u1eadt \u0111\u1ed9 kh\u1ed1i, gi\u00e1 tr\u1ecb pH, \u0111\u1ed9 \u1ea9m, h\u00ecnh d\u1ea1ng tinh th\u1ec3, gi\u00e1 tr\u1ecb h\u1ea5p th\u1ee5 d\u1ea7u, v.v. H\u00e3y c\u00f9ng xem x\u00e9t s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa canxi cacbonat n\u1eb7ng v\u00e0 canxi nh\u1eb9. mu\u1ed1i cacbonat.<\/p>\n

(1) Ngu\u1ed3n:<\/p>\n

Canxi cacbonat n\u1eb7ng (th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 canxi cacbonat xay) c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t b\u1eb1ng c\u00e1ch nghi\u1ec1n tr\u1ef1c ti\u1ebfp canxit t\u1ef1 nhi\u00ean, \u0111\u00e1 v\u00f4i, ph\u1ea5n v\u00e0 v\u1ecf b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p c\u01a1 h\u1ecdc (m\u00e1y nghi\u1ec1n Raymond ho\u1eb7c m\u00e1y nghi\u1ec1n \u00e1p su\u1ea5t cao kh\u00e1c). V\u00ec th\u1ec3 t\u00edch l\u1eafng c\u1ee7a canxi cacbonat n\u1eb7ng nh\u1ecf h\u01a1n so v\u1edbi canxi cacbonat nh\u1eb9 n\u00ean n\u00f3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 canxi cacbonat n\u1eb7ng.<\/p>\n

Canxi cacbonat nh\u1eb9, c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 canxi cacbonat k\u1ebft t\u1ee7a, l\u00e0 \u0111\u00e1 v\u00f4i nung v\u00e0 c\u00e1c nguy\u00ean li\u1ec7u th\u00f4 kh\u00e1c \u0111\u1ec3 s\u1ea3n xu\u1ea5t v\u00f4i (th\u00e0nh ph\u1ea7n ch\u00ednh l\u00e0 oxit canxi) v\u00e0 cacbon \u0111ioxit, sau \u0111\u00f3 ng\u01b0\u1eddi ta cho n\u01b0\u1edbc v\u00e0o \u0111\u1ec3 ti\u00eau h\u00f3a v\u00f4i \u0111\u1ec3 t\u1ea1o ra s\u1eefa v\u00f4i (th\u00e0nh ph\u1ea7n ch\u00ednh l\u00e0 canxi hydroxit), v\u00e0 sau \u0111\u00f3 carbon dioxide \u0111\u01b0\u1ee3c th\u00eam v\u00e0o s\u1eefa v\u00f4i cacbon h\u00f3a \u0111\u1ec3 t\u1ea1o th\u00e0nh k\u1ebft t\u1ee7a canxi cacbonat, v\u00e0 cu\u1ed1i c\u00f9ng kh\u1eed n\u01b0\u1edbc, l\u00e0m kh\u00f4 v\u00e0 nghi\u1ec1n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n. Ho\u1eb7c n\u00f3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng ph\u1ea3n \u1ee9ng ph\u00e2n h\u1ee7y k\u00e9p c\u1ee7a natri cacbonat v\u00e0 canxi clorua \u0111\u1ec3 t\u1ea1o th\u00e0nh k\u1ebft t\u1ee7a canxi cacbonat, sau \u0111\u00f3 \u0111\u01b0\u1ee3c kh\u1eed n\u01b0\u1edbc, l\u00e0m kh\u00f4 v\u00e0 nghi\u1ec1n nh\u1ecf. V\u00ec th\u1ec3 t\u00edch l\u1eafng c\u1ee7a canxi cacbonat nh\u1eb9 (2,4-2,8 ml \/ g) l\u1edbn h\u01a1n kh\u1ed1i l\u01b0\u1ee3ng l\u1eafng c\u1ee7a canxi cacbonat n\u1eb7ng (1,1-1,9 mg \/ L) n\u00ean n\u00f3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 canxi cacbonat nh\u1eb9.<\/p>\n

(2) M\u1eadt \u0111\u1ed9 \u0111\u00f3ng g\u00f3i kh\u00e1c nhau<\/p>\n

S\u1ef1 kh\u00e1c bi\u1ec7t r\u00f5 r\u00e0ng nh\u1ea5t gi\u1eefa canxi n\u1eb7ng v\u00e0 canxi nh\u1eb9 n\u1eb1m \u1edf m\u1eadt \u0111\u1ed9 kh\u1ed1i l\u01b0\u1ee3ng kh\u00e1c nhau c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m. M\u1eadt \u0111\u1ed9 kh\u1ed1i c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m canxi n\u1eb7ng l\u1edbn h\u01a1n, th\u01b0\u1eddng 0,8 ~ 1,3g \/ cm\u00b3; trong khi m\u1eadt \u0111\u1ed9 kh\u1ed1i c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m canxi nh\u1eb9 l\u00e0 nh\u1ecf, ch\u1ee7 y\u1ebfu l\u00e0 0,5 ~ 0,7g \/ cm\u00b3; M\u1eadt \u0111\u1ed9 kh\u1ed1i c\u1ee7a m\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9m canxi cacbonat nano th\u1eadm ch\u00ed c\u00f2n th\u1ea5p h\u01a1n, c\u00f3 th\u1ec3 \u0111\u1ea1t kho\u1ea3ng 0,28g \/ cm\u00b3. T\u1eeb kh\u1ed1i l\u01b0\u1ee3ng bao b\u00ec c\u1ee7a s\u1ea3n ph\u1ea9m, ch\u00fang ta c\u00f3 th\u1ec3 ph\u00e2n bi\u1ec7t m\u1ed9t c\u00e1ch \u0111\u1ea1i kh\u00e1i s\u1ea3n ph\u1ea9m canxi n\u1eb7ng v\u00e0 canxi nh\u1eb9. Nh\u00ecn chung, h\u1ea7u h\u1ebft c\u00e1c s\u1ea3n ph\u1ea9m canxi n\u1eb7ng l\u00e0 25kg \/ g\u00f3i v\u00e0 th\u1ec3 t\u00edch \u0111\u00f3ng g\u00f3i s\u1ea3n ph\u1ea9m nh\u1ecf, trong khi c\u00e1c s\u1ea3n ph\u1ea9m canxi nh\u1eb9 c\u00f9ng ch\u1ea5t l\u01b0\u1ee3ng c\u00f3 th\u1ec3 t\u00edch bao b\u00ec l\u1edbn h\u01a1n. M\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9m nano canxi cacbonat c\u00f2n \u0111\u01b0\u1ee3c \u0111\u00f3ng g\u00f3i 15kg \/ g\u00f3i ho\u1eb7c 20kg \/ g\u00f3i.<\/p>\n

(3) \u0110\u1ed9 tr\u1eafng kh\u00e1c nhau<\/p>\n

Do c\u00f3 nhi\u1ec1u t\u1ea1p ch\u1ea5t trong s\u1ea3n ph\u1ea9m canxi cacbonat n\u1eb7ng n\u00ean \u0111\u1ed9 tr\u1eafng c\u1ee7a s\u1ea3n ph\u1ea9m n\u00f3i chung \u0111\u1ea1t 89% – 93%, m\u1ed9t s\u1ed1 \u00edt s\u1ea3n ph\u1ea9m c\u00f3 th\u1ec3 \u0111\u1ea1t 95%. C\u00e1c s\u1ea3n ph\u1ea9m canxi nh\u1eb9 \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p t\u1ed5ng h\u1ee3p h\u00f3a h\u1ecdc, nhi\u1ec1u t\u1ea1p ch\u1ea5t \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf v\u00e0 \u0111\u1ed9 tinh khi\u1ebft c\u1ee7a s\u1ea3n ph\u1ea9m r\u1ea5t cao. Do \u0111\u00f3, \u0111\u1ed9 tr\u1eafng c\u1ee7a h\u1ea7u h\u1ebft c\u00e1c s\u1ea3n ph\u1ea9m l\u00e0 92% – 95%, m\u1ed9t s\u1ed1 s\u1ea3n ph\u1ea9m c\u00f3 th\u1ec3 \u0111\u1ea1t 96% – 97%. \u0110\u00e2y c\u0169ng l\u00e0 l\u00fd do ch\u00ednh t\u1ea1i sao c\u00e1c s\u1ea3n ph\u1ea9m canxi nh\u1eb9 h\u1ea7u h\u1ebft \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 tr\u00e1m c\u00e1c s\u1ea3n ph\u1ea9m cao c\u1ea5p ho\u1eb7c m\u00e0u s\u00e1ng.<\/p>\n

(4) Ch\u1ee9c n\u0103ng s\u1eeda \u0111\u1ed5i l\u00e0 kh\u00e1c nhau<\/p>\n

C\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t nh\u1ecf gi\u1eefa c\u00e1c hi\u1ec7u \u1ee9ng s\u1eeda \u0111\u1ed5i c\u1ee7a canxi cacbonat n\u1eb7ng v\u00e0 canxi cacbonat nh\u1eb9. Canxi cacbonat n\u1eb7ng t\u1ed1t h\u01a1n cho \u0111\u1ed9 b\u1ec1n k\u00e9o, trong khi canxi cacbonat nh\u1eb9 t\u1ed1t h\u01a1n cho \u0111\u1ed9 b\u1ec1n va \u0111\u1eadp v\u00e0 \u0111\u1ed9 c\u1ee9ng. N\u00f3i chung, b\u1ec1 m\u1eb7t c\u1ee7a nh\u1ef1a v\u1edbi canxi cacbonat nh\u1eb9 m\u1ecbn h\u01a1n v\u00e0 m\u1eadt \u0111\u1ed9 th\u1ea5p h\u01a1n; T\u00ednh l\u01b0u \u0111\u1ed9ng x\u1eed l\u00fd c\u1ee7a nh\u1ef1a n\u1eb7ng canxi t\u1ed1t h\u01a1n, v\u00e0 c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a nh\u1ef1a ch\u1ee9a \u0111\u1ea7y k\u00edch th\u01b0\u1edbc h\u1ea1t nh\u1ecf c\u1ee7a canxi n\u1eb7ng c\u0169ng t\u1ed1t h\u01a1n.<\/p>\n

(5) K\u00edch th\u01b0\u1edbc h\u1ea1t kh\u00e1c nhau<\/p>\n

K\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a canxi cacbonat n\u1eb7ng l\u00e0 0,5 ~ 45um, v\u00e0 k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a s\u1ea3n ph\u1ea9m thay \u0111\u1ed5i t\u00f9y theo thi\u1ebft b\u1ecb nghi\u1ec1n. K\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m canxi nh\u1eb9 th\u00f4ng th\u01b0\u1eddng th\u01b0\u1eddng l\u00e0 0,5-15um, r\u1ea5t kh\u00f3 \u0111o ch\u00ednh x\u00e1c do h\u00ecnh d\u1ea1ng tr\u1ee5c ch\u00ednh c\u1ee7a n\u00f3, th\u01b0\u1eddng n\u1eb1m trong m\u1ed9t ph\u1ea1m vi; nano canxi cacbonat \u1edf d\u1ea1ng canxi nh\u1eb9 th\u00ec m\u1ecbn h\u01a1n v\u00e0 k\u00edch th\u01b0\u1edbc th\u01b0\u1eddng l\u00e0 20-200nm. K\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a canxi cacbonat nh\u1eb9 th\u00f4ng th\u01b0\u1eddng th\u01b0\u1eddng kho\u1ea3ng 2500 mesh, c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 hi\u1ec7u su\u1ea5t c\u1ee7a \u1ed1ng v\u00e0 c\u1ea5u ki\u1ec7n PVC. Do \u0111\u00f3, t\u1eeb quan \u0111i\u1ec3m c\u1ee7a k\u00edch th\u01b0\u1edbc h\u1ea1t, canxi cacbonat nh\u1eb9 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho \u1ed1ng v\u00e0 thanh PVC. Tr\u01b0\u1edbc \u0111\u00e2y, do h\u1ea1n ch\u1ebf c\u1ee7a thi\u1ebft b\u1ecb nghi\u1ec1n, cacbonat canxi n\u1eb7ng kh\u00f4ng th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 m\u1ecbn n\u00e0y. B\u00e2y gi\u1edd, k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a canxi cacbonat n\u1eb7ng c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng \u0111\u1ea7y \u0111\u1ee7 nhu c\u1ea7u, th\u1eadm ch\u00ed c\u00f2n m\u1ecbn h\u01a1n canxi cacbonat nh\u1eb9. Do \u0111\u00f3, c\u00f3 th\u1ec3 l\u1ef1a ch\u1ecdn c\u1ea3 \u1ed1ng PVC v\u00e0 c\u1ea5u h\u00ecnh.<\/p>\n

(6) Ch\u00eanh l\u1ec7ch gi\u00e1:<\/p>\n

Qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn cacbonat canxi n\u1eb7ng ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec1n v\u00e0 nghi\u1ec1n c\u01a1 h\u1ecdc; vi\u1ec7c s\u1ea3n xu\u1ea5t canxi cacbonat nh\u1eb9 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng ph\u1ea3n \u1ee9ng k\u1ebft t\u1ee7a ph\u1ea3n \u1ee9ng h\u00f3a h\u1ecdc, ph\u1ee9c t\u1ea1p h\u01a1n nhi\u1ec1u so v\u1edbi canxi cacbonat n\u1eb7ng, v\u00e0 c\u00e1c y\u00eau c\u1ea7u t\u01b0\u01a1ng \u1ee9ng c\u0169ng kh\u1eaft khe h\u01a1n. Do \u0111\u00f3, canxi cacbonat n\u1eb7ng c\u00f3 c\u00f9ng k\u00edch th\u01b0\u1edbc h\u1ea1t r\u1ebb h\u01a1n canxi cacbonat nh\u1eb9 kho\u1ea3ng 30%. N\u1ebfu hi\u1ec7u su\u1ea5t cho ph\u00e9p, c\u00f3 th\u1ec3 ch\u1ecdn canxi cacbonat n\u1eb7ng, ti\u1ebft ki\u1ec7m h\u01a1n v\u00e0 r\u1ebb h\u01a1n.<\/p>\n

2. L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 ch\u1ecdn canxi cacbonat trong c\u00f4ng nghi\u1ec7p cao su v\u00e0 nh\u1ef1a?<\/strong><\/p>\n

M\u1ed9t s\u1ed1 ng\u01b0\u1eddi ngh\u0129 r\u1eb1ng vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1c s\u1ea3n ph\u1ea9m nh\u1ef1a n\u01b0\u1edbc ngo\u00e0i \u0111\u1ec3 \u0111\u1ed9n canxi l\u00e0 ch\u00ednh, c\u00e2u n\u00f3i c\u1ed5 \u0111i\u1ec3n l\u00e0 14-18: 1, v\u00ec v\u1eady ng\u00e0nh nh\u1ef1a n\u00ean c\u1ed1 g\u1eafng s\u1eed d\u1ee5ng canxi, thay v\u00ec canxi nh\u1eb9.
\nVi\u1ec7c s\u1eed d\u1ee5ng canxi n\u1eb7ng v\u00e0 canxi nh\u1eb9 trong c\u00e1c s\u1ea3n ph\u1ea9m nh\u1ef1a c\u0169ng t\u01b0\u01a1ng t\u1ef1 nh\u01b0 c\u00e1c s\u1ea3n ph\u1ea9m cao su. M\u1ed9t s\u1ed1 nh\u00e0 s\u1ea3n xu\u1ea5t \u0111\u00e3 b\u00e1o c\u00e1o r\u1eb1ng trong c\u00f9ng m\u1ed9t \u0111i\u1ec1u ki\u1ec7n, vi\u1ec7c s\u1eed d\u1ee5ng – 400 mesh canxi n\u1eb7ng thay v\u00ec canxi nh\u1eb9 c\u00f3 l\u1ee3i th\u1ebf r\u00f5 r\u00e0ng \u0111\u1ed1i v\u1edbi c\u00e1c s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c b\u00e1n theo tr\u1ecdng l\u01b0\u1ee3ng, nh\u01b0ng n\u1ebfu s\u1ea3n ph\u1ea9m \u0111\u01b0\u1ee3c b\u00e1n theo chi\u1ec1u d\u00e0i, di\u1ec7n t\u00edch ho\u1eb7c s\u1ed1 l\u01b0\u1ee3ng th\u00ec canxi n\u1eb7ng kh\u00f4ng kh\u00f4ng c\u00f3 l\u1ee3i th\u1ebf h\u01a1n canxi nh\u1eb9.<\/p>\n

V\u00ed d\u1ee5, n\u1ebfu c\u00f9ng m\u1ed9t kh\u1ed1i l\u01b0\u1ee3ng nguy\u00ean li\u1ec7u \u0111\u01b0\u1ee3c \u0111\u1ed5 \u0111\u1ea7y c\u00f9ng m\u1ed9t l\u01b0\u1ee3ng nguy\u00ean li\u1ec7u th\u00ec chi\u1ec1u d\u00e0i c\u1ee7a s\u1ea3n ph\u1ea9m thu \u0111\u01b0\u1ee3c s\u1ebd kh\u00e1c nhau. N\u1ebfu \u1ed1ng ch\u1ee9a \u0111\u1ea7y canxi n\u1eb7ng, n\u00f3 s\u1ebd ng\u1eafn h\u01a1n v\u00e0i ph\u1ea7n ngh\u00ecn so v\u1edbi \u1ed1ng ch\u1ee9a \u0111\u1ea7y canxi nh\u1eb9. \u0110\u1ed1i v\u1edbi da nh\u00e2n t\u1ea1o ho\u1eb7c da t\u1ed5ng h\u1ee3p \u0111\u01b0\u1ee3c \u0111o theo di\u1ec7n t\u00edch, c\u0169ng c\u00f3 th\u1ec3 c\u1ea3m nh\u1eadn \u0111\u01b0\u1ee3c s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 di\u1ec7n t\u00edch. V\u00ec v\u1eady, c\u00e1c nh\u00e0 m\u00e1y ch\u1ebf bi\u1ebfn s\u1ea3n ph\u1ea9m nh\u1ef1a kh\u00f4ng n\u00ean t\u1eeb b\u1ecf vi\u1ec7c s\u1eed d\u1ee5ng canxi nh\u1eb9.<\/p>\n

T\u1eeb quan \u0111i\u1ec3m h\u1ecdc thu\u1eadt, c\u00f3 nhi\u1ec1u \u0111i\u1ec3m kh\u00e1c bi\u1ec7t gi\u1eefa hai lo\u1ea1i, ch\u1eb3ng h\u1ea1n nh\u01b0 c\u00e1c d\u1ea1ng tinh th\u1ec3 kh\u00e1c nhau, di\u1ec7n t\u00edch b\u1ec1 m\u1eb7t c\u1ee5 th\u1ec3 kh\u00e1c nhau, gi\u00e1 tr\u1ecb h\u1ea5p th\u1ee5 d\u1ea7u kh\u00e1c nhau, v.v. Trong ma tr\u1eadn nh\u1ef1a, d\u1ea1ng c\u00e1c h\u1ea1t canxi n\u1eb7ng ho\u1eb7c canxi nh\u1eb9 \u0111\u01b0\u1ee3c ph\u00e2n b\u1ed1 trong c\u00e1c \u0111\u1ea1i ph\u00e2n t\u1eed ma tr\u1eadn t\u1eebng c\u00e1i m\u1ed9t, ho\u1eb7c theo nh\u00f3m, \u1edf d\u1ea1ng t\u1eadp h\u1ee3p l\u1ecfng l\u1ebbo trong nh\u1ef1a n\u1ec1n, v\u00e0 tr\u1ea1ng th\u00e1i ph\u00e2n c\u00e1ch gi\u1eefa c\u00e1c h\u1ea1t n\u00e0y v\u00e0 nh\u1ef1a. \u0111\u1ea1i ph\u00e2n t\u1eed li\u00ean quan tr\u1ef1c ti\u1ebfp \u0111\u1ebfn c\u01a1 t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u.<\/p>\n

Vi\u1ec7c s\u1eed d\u1ee5ng canxi n\u1eb7ng hay canxi nh\u1eb9 trong c\u00e1c s\u1ea3n ph\u1ea9m nh\u1ef1a kh\u00f4ng gi\u1ed1ng nhau. Ch\u00fang ta n\u00ean ph\u00e1t huy h\u1ebft l\u1ee3i th\u1ebf c\u1ee7a h\u1ecd v\u00e0 k\u1ebft h\u1ee3p c\u00e1c y\u1ebfu t\u1ed1 kinh t\u1ebf k\u1ef9 thu\u1eadt \u0111\u1ec3 xem x\u00e9t m\u1ed9t c\u00e1ch to\u00e0n di\u1ec7n.<\/p>\n

V\u00ed d\u1ee5, trong s\u1ea3n xu\u1ea5t da nh\u00e2n t\u1ea1o PVC, c\u00f3 th\u1ec3 chia th\u00e0nh ph\u01b0\u01a1ng ph\u00e1p c\u1ea1o, ph\u01b0\u01a1ng ph\u00e1p gia c\u00f4ng v\u00e0 ph\u01b0\u01a1ng ph\u00e1p \u0111\u00f9n theo quy tr\u00ecnh s\u1ea3n xu\u1ea5t, trong khi ph\u01b0\u01a1ng ph\u00e1p c\u1ea1o s\u1eed d\u1ee5ng nh\u1ef1a d\u00e1n PVC, c\u1ea7n th\u00eam nhi\u1ec1u ch\u1ea5t h\u00f3a d\u1ebbo. Gi\u00e1 tr\u1ecb h\u1ea5p th\u1ee5 d\u1ea7u c\u1ee7a canxi nh\u1eb9 cao g\u1ea5p 4 – 5 l\u1ea7n canxi n\u1eb7ng. Do \u0111\u00f3, vi\u1ec7c s\u1eed d\u1ee5ng canxi nh\u1eb9 c\u1ea7n nhi\u1ec1u ch\u1ea5t h\u00f3a d\u1ebbo h\u01a1n \u0111\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c \u0111\u1ed9 m\u1ec1m d\u1ebbo t\u01b0\u01a1ng t\u1ef1 so v\u1edbi vi\u1ec7c s\u1eed d\u1ee5ng canxi n\u1eb7ng. N\u1ebfu c\u00f3 th\u1ec3 gi\u1ea3m l\u01b0\u1ee3ng ch\u1ea5t h\u00f3a d\u1ebbo, th\u00ec vi\u1ec7c s\u1eed d\u1ee5ng canxi n\u1eb7ng c\u00f3 th\u1ec3 ti\u1ebft ki\u1ec7m h\u01a1n.<\/p>\n

V\u00ed d\u1ee5, t\u00fai d\u1ec7t b\u1eb1ng polypropylene, v\u1ea3i d\u1ec7t thoi, d\u00e2y \u0111ai \u0111\u00f3ng g\u00f3i v\u00e0 c\u00e1c s\u1ea3n ph\u1ea9m ch\u1ecbu k\u00e9o m\u1ed9t chi\u1ec1u kh\u00e1c, s\u1eed d\u1ee5ng canxi cacbonat n\u1eb7ng v\u00e0 canxi cacbonat nh\u1eb9 l\u00e0m ch\u1ea5t \u0111\u1ed9n kh\u00f4ng t\u00ecm th\u1ea5y b\u1ea5t k\u1ef3 s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0o v\u1ec1 chi\u1ec1u d\u00e0i. Ng\u01b0\u1eddi ta nh\u1eadn th\u1ea5y r\u1eb1ng h\u1ea7u h\u1ebft c\u00e1c h\u1ea1t ch\u1ea5t \u0111\u1ed9n \u0111\u1ec1u n\u1eb1m trong kho\u1ea3ng tr\u1ed1ng gi\u1eefa c\u00e1c \u0111\u1ea1i ph\u00e2n t\u1eed \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh do k\u00e9o c\u0103ng. Sau nhi\u1ec1u l\u1ea7n k\u00e9o d\u00e3n v\u00e0 l\u00e0m ngu\u1ed9i nhanh, h\u00ecnh th\u00e1i c\u1ee7a c\u00e1c \u0111\u1ea1i ph\u00e2n t\u1eed b\u1ecb \u0111\u00f4ng l\u1ea1i nhanh ch\u00f3ng, trong khi t\u1ef7 tr\u1ecdng th\u1ef1c c\u1ee7a canxi nh\u1eb9 v\u00e0 canxi n\u1eb7ng g\u1ea7n nh\u01b0 gi\u1ed1ng nhau n\u00ean kh\u00f4ng th\u1ea5y r\u00f5 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 d\u00e0i cu\u1ed1i c\u00f9ng c\u1ee7a s\u1ea3n ph\u1ea9m. M\u1eb7t kh\u00e1c, so v\u1edbi canxi nh\u1eb9, kh\u1ea3 n\u0103ng x\u1eed l\u00fd linh ho\u1ea1t c\u1ee7a canxi n\u1eb7ng t\u1ed1t h\u01a1n v\u00e0 gi\u00e1 th\u00e0nh th\u1ea5p h\u01a1n nhi\u1ec1u. V\u00ec v\u1eady, \u1edf lo\u1ea1i s\u1ea3n ph\u1ea9m ch\u1ecbu k\u00e9o m\u1ed9t chi\u1ec1u n\u00e0y, n\u00f3 chi\u1ebfm \u01b0u th\u1ebf tuy\u1ec7t \u0111\u1ed1i.<\/p>\n

Ngo\u00e0i ra, trong c\u00f4ng ngh\u1ec7 gia c\u00f4ng \u0111\u00fac thanh profile c\u1eeda nh\u1ef1a v\u00e0 c\u1eeda s\u1ed5, ch\u1ea5t \u0111\u1ed9n l\u00e0 canxi nh\u1eb9, li\u1ec1u l\u01b0\u1ee3ng 8-10phr. C\u1ea7n ph\u1ea3i ch\u1ec9 ra r\u1eb1ng c\u00f4ng th\u1ee9c do n\u01b0\u1edbc ngo\u00e0i cung c\u1ea5p l\u00e0 c\u00f3 c\u01a1 s\u1edf khoa h\u1ecdc. \u0110i\u1ec3m kh\u1edfi \u0111\u1ea7u c\u1ee7a vi\u1ec7c b\u1ed5 sung canxi cacbonat l\u00e0 \u0111\u1ec3 c\u1ea3i thi\u1ec7n hi\u1ec7u su\u1ea5t t\u1ed5ng th\u1ec3 c\u1ee7a h\u1ed3 s\u01a1, kh\u00f4ng s\u1eed d\u1ee5ng nguy\u00ean li\u1ec7u th\u00f4 gi\u00e1 r\u1ebb \u0111\u1ec3 gi\u1ea3m gi\u00e1 th\u00e0nh.<\/p>\n

3. \u1ee8ng d\u1ee5ng c\u1ee7a canxi cacbonat trong nh\u1ef1a ph\u00e2n h\u1ee7y<\/strong><\/p>\n

PLA l\u00e0 m\u1ed9t trong nh\u1eefng lo\u1ea1i nh\u1ef1a ph\u00e2n h\u1ee7y ph\u00e1t tri\u1ec3n nhanh nh\u1ea5t tr\u00ean th\u1ecb tr\u01b0\u1eddng. Canxi cacbonat \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m ch\u1ea5t \u0111\u1ed9n b\u1ed9t trong qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn nguy\u00ean li\u1ec7u \u0111\u1ec3 cung c\u1ea5p hi\u1ec7u su\u1ea5t v\u00e0 th\u00e0nh ph\u1ea7n gi\u00e1 c\u1ea3 c\u1ee7a PLA. Ph\u01b0\u01a1ng ph\u00e1p n\u00e0y c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong nh\u1ef1a truy\u1ec1n th\u1ed1ng, kh\u00f4ng ch\u1ec9 c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t m\u00e0 c\u00f2n gi\u1ea3m chi ph\u00ed nguy\u00ean li\u1ec7u nh\u1ef1a. So v\u1edbi c\u00e1c lo\u1ea1i b\u1ed9t kho\u00e1ng phi kim lo\u1ea1i kh\u00e1c, canxi cacbonat c\u00f3 \u01b0u \u0111i\u1ec3m l\u1edbn: gi\u00e1 th\u00e0nh r\u1ebb, d\u1ec5 t\u1ea1o m\u00e0u, \u0111\u1ed9 c\u1ee9ng th\u1ea5p, \u00edt hao m\u00f2n tr\u1ee5c v\u00edt v\u00e0 khu\u00f4n, \u1ed5n \u0111\u1ecbnh nhi\u1ec7t v\u00e0 h\u00f3a h\u1ecdc t\u1ed1t, d\u1ec5 l\u00e0m kh\u00f4, kh\u00f4ng \u0111\u1ed9c v\u00e0 kh\u00f4ng v\u1ecb.<\/p>\n

T\u1eeb quan \u0111i\u1ec3m k\u1ef9 thu\u1eadt, v\u1eadt li\u1ec7u b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng thay th\u1ebf nh\u1ef1a kh\u00f4ng ph\u00e2n h\u1ee7y l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh l\u00e2u d\u00e0i, v\u00e0 kh\u00f4ng gian c\u1ea3i ti\u1ebfn c\u1ee7a nh\u1ef1a kh\u00f3 ph\u00e2n h\u1ee7y v\u1ec1 kh\u1ea3 n\u0103ng ch\u1ed1ng r\u01a1i, ch\u1ecbu nhi\u1ec7t v\u00e0 ch\u1ed1ng \u0103n m\u00f2n l\u00e0 m\u1ed9t v\u1ea5n \u0111\u1ec1 kh\u00e1c. \u0110i\u1ec1u n\u00e0y c\u0169ng c\u00f3 ngh\u0129a l\u00e0 nh\u1ef1a c\u00f3 th\u1ec3 ph\u00e2n h\u1ee7y c\u1ee7a Trung Qu\u1ed1c s\u1ebd m\u1edf ra c\u01a1 h\u1ed9i ph\u00e1t tri\u1ec3n. \u0110\u1ebfn n\u0103m 2030, nhu c\u1ea7u v\u1ec1 nh\u1ef1a c\u00f3 th\u1ec3 ph\u00e2n h\u1ee7y \u1edf Trung Qu\u1ed1c d\u1ef1 ki\u1ebfn \u200b\u200b\u0111\u1ea1t 4,28 tri\u1ec7u t\u1ea5n v\u00e0 quy m\u00f4 th\u1ecb tr\u01b0\u1eddng c\u00f3 th\u1ec3 \u0111\u1ea1t 85,5 t\u1ef7 nh\u00e2n d\u00e2n t\u1ec7. Do gi\u00e1 th\u00e0nh t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p, canxi cacbonat xay si\u00eau m\u1ecbn, canxi cacbonat nh\u1eb9 v\u00e0 canxi cacbonat nano c\u00f3 th\u1ec3 th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh ph\u00e2n h\u1ee7y nh\u1ef1a v\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i th\u00e2n thi\u1ec7n v\u1edbi m\u00f4i tr\u01b0\u1eddng. Trong t\u01b0\u01a1ng lai, t\u1ef7 tr\u1ecdng ph\u1ee5 gia trong nh\u1ef1a ph\u00e2n h\u1ee7y s\u1ebd ng\u00e0y c\u00e0ng l\u1edbn v\u00e0 tri\u1ec3n v\u1ecdng th\u1ecb tr\u01b0\u1eddng ng\u00e0y c\u00e0ng r\u1ed9ng l\u1edbn h\u01a1n.<\/p>\n

4. T\u00ecnh h\u00ecnh g\u1ea7n \u0111\u00e2y c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p cacbonat canxi \u1edf Trung Qu\u1ed1c<\/strong><\/p>\n

Kh\u00f4ng c\u00f2n nghi ng\u1edd g\u00ec n\u1eefa, Trung Qu\u1ed1c r\u1ea5t gi\u00e0u t\u00e0i nguy\u00ean kho\u00e1ng s\u1ea3n canxi cacbonat. V\u00e0o th\u00e1ng 8, c\u00e1c m\u1ecf canxi cacbonat m\u1edbi \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n \u1edf Qu\u1ea3ng T\u00e2y v\u00e0 H\u1ed3 Nam, v\u1edbi t\u1ed5ng tr\u1eef l\u01b0\u1ee3ng l\u00e0 607,5 tri\u1ec7u t\u1ea5n, cung c\u1ea5p \u0111\u1ee7 ngu\u1ed3n l\u1ef1c cho s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p cacbonat canxi \u1edf \u0111\u1ecba ph\u01b0\u01a1ng.
\nTrong nh\u1eefng n\u0103m g\u1ea7n \u0111\u00e2y, ng\u00e0nh c\u00f4ng nghi\u1ec7p canxi cacbonat c\u1ee7a Trung Qu\u1ed1c \u0111ang c\u00f3 xu h\u01b0\u1edbng t\u0103ng tr\u01b0\u1edfng \u1ed5n \u0111\u1ecbnh. N\u0103m 2019, s\u1ea3n l\u01b0\u1ee3ng c\u1ee7a ng\u00e0nh c\u00f4ng nghi\u1ec7p canxi cacbonat c\u1ee7a Trung Qu\u1ed1c l\u00e0 35,95 tri\u1ec7u t\u1ea5n, bao g\u1ed3m 13,5 tri\u1ec7u t\u1ea5n canxi cacbonat nh\u1eb9 v\u00e0 22,45 tri\u1ec7u t\u1ea5n canxi cacbonat n\u1eb7ng; l\u01b0\u1ee3ng nh\u1eadp kh\u1ea9u 49000 t\u1ea5n, l\u01b0\u1ee3ng xu\u1ea5t kh\u1ea9u 122000 t\u1ea5n, ti\u00eau th\u1ee5 35,877 tri\u1ec7u t\u1ea5n.<\/p>\n

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Gi\u00e1 c\u1ea3 c\u1ee7a s\u1ea3n ph\u1ea9m c\u0169ng cho th\u1ea5y xu h\u01b0\u1edbng ng\u00e0y c\u00e0ng t\u0103ng. S\u1ea3n ph\u1ea9m canxi cacbonat n\u1eb7ng t\u0103ng t\u1eeb 535 nh\u00e2n d\u00e2n t\u1ec7 \/ t\u1ea5n n\u0103m 2014 l\u00ean 572 nh\u00e2n d\u00e2n t\u1ec7 \/ t\u1ea5n v\u00e0o n\u0103m 2019, v\u00e0 s\u1ea3n ph\u1ea9m canxi cacbonat nh\u1eb9 t\u0103ng t\u1eeb 640 nh\u00e2n d\u00e2n t\u1ec7 \/ t\u1ea5n n\u0103m 2014 l\u00ean 822 nh\u00e2n d\u00e2n t\u1ec7 \/ t\u1ea5n n\u0103m 2019. Gi\u00e1 tr\u1ecb s\u1ea3n l\u01b0\u1ee3ng c\u0169ng duy tr\u00ec t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng nhanh ch\u00f3ng, t\u1eeb 16,696 t\u1ef7 nh\u00e2n d\u00e2n t\u1ec7 n\u0103m 2014 l\u00ean 24,178 t\u1ef7 nh\u00e2n d\u00e2n t\u1ec7 v\u00e0o n\u0103m 2019, v\u1edbi t\u1ed1c \u0111\u1ed9 t\u0103ng tr\u01b0\u1edfng k\u00e9p l\u00e0 7,69%. N\u0103m 2019, gi\u00e1 tr\u1ecb s\u1ea3n l\u01b0\u1ee3ng canxi cacbonat c\u1ee7a Trung Qu\u1ed1c l\u00e0 24,178 t\u1ef7 nh\u00e2n d\u00e2n t\u1ec7, bao g\u1ed3m 11,208 t\u1ef7 nh\u00e2n d\u00e2n t\u1ec7 c\u1ee7a canxi cacbonat nh\u1eb9 v\u00e0 12,97 t\u1ef7 nh\u00e2n d\u00e2n t\u1ec7 c\u1ee7a canxi cacbonat n\u1eb7ng.<\/p>\n

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5. ALPA x C\u00f4ng ngh\u1ec7 v\u01b0\u1ee3t tr\u1ed9i trong ng\u00e0nh cacbonat canxi (Kho\u00e1ng ch\u1ea5t phi kim lo\u1ea1i)<\/strong><\/p>\n

Trong l\u0129nh v\u1ef1c ch\u1ebf bi\u1ebfn kho\u00e1ng phi kim lo\u1ea1i, ALPA c\u00f3 th\u1ec3 cung c\u1ea5p c\u00e1c c\u00f4ng ngh\u1ec7 c\u1ed1t l\u00f5i sau:<\/p>\n

\uff081\uff09 C\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n s\u1ea3n xu\u1ea5t quy m\u00f4 l\u1edbn v\u00e0 chi ph\u00ed th\u1ea5p b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng quy tr\u00ecnh ph\u00e2n lo\u1ea1i phay bi. L\u1ea5y canxi cacbonat l\u00e0m v\u00ed d\u1ee5, m\u1ed9t d\u00e2y chuy\u1ec1n s\u1ea3n xu\u1ea5t \u0111\u01a1n D97: 10 \u03bcm c\u00f3 th\u1ec3 s\u1ea3n xu\u1ea5t 100000 t\u1ea5n s\u1ea3n ph\u1ea9m h\u00e0ng n\u0103m v\u00e0 m\u1ee9c ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng tr\u00ean m\u1ed9t t\u1ea5n s\u1ea3n ph\u1ea9m c\u00f3 th\u1ec3 \u0111\u1ea1t 150 \u0111\u1ed9. C\u00e1c kho\u00e1ng ch\u1ea5t ph\u00f9 h\u1ee3p bao g\u1ed3m canxit, \u0111\u00e1 c\u1ea9m th\u1ea1ch, \u0111\u00e1 v\u00f4i, th\u1ea1ch anh, c\u00e1t zircon, fenspat, gangue than, dolomit, magnesit, v.v.<\/p>\n

\uff082\uff09 C\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n s\u1ea3n xu\u1ea5t si\u00eau m\u1ecbn v\u00e0 chi ph\u00ed th\u1ea5p b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 m\u00e1y nghi\u1ec1n h\u01a1i n\u01b0\u1edbc. L\u1ea5y v\u00ed d\u1ee5 v\u1ec1 b\u1ed9t talc, k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a b\u1ed9t talc c\u00f3 th\u1ec3 \u0111\u1ea1t 1 \u03bcm v\u00e0 \u0111\u1ed9 d\u00e0y c\u1ee7a b\u1ed9t talc l\u00e0 300nm. C\u00e1c kho\u00e1ng ch\u1ea5t th\u00edch h\u1ee3p bao g\u1ed3m talc, graphite, mica, wollastonite, brucite d\u1ea1ng s\u1ee3i, attapulgite, kaolin<\/a>, v.v.<\/p>\n

\uff083\uff09 S\u1ea3n xu\u1ea5t si\u00eau m\u1ecbn v\u00e0 si\u00eau tinh khi\u1ebft c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 m\u00e1y nghi\u1ec1n Jet, th\u00edch h\u1ee3p \u0111\u1ec3 ch\u1ebf bi\u1ebfn c\u00e1c kho\u00e1ng ch\u1ea5t c\u00f3 gi\u00e1 tr\u1ecb gia t\u0103ng cao. L\u1ea5y th\u1ea1ch anh l\u00e0m v\u00ed d\u1ee5, k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a s\u1ea3n ph\u1ea9m c\u00f3 th\u1ec3 \u0111\u1ea1t t\u1edbi 2 \u03bcm v\u00e0 s\u1ef1 gia t\u0103ng t\u1ea1p ch\u1ea5t kim lo\u1ea1i trong s\u1ea3n ph\u1ea9m nh\u1ecf h\u01a1n 10ppm. C\u00e1c kho\u00e1ng ch\u1ea5t th\u00edch h\u1ee3p bao g\u1ed3m talc, th\u1ea1ch anh, barit, graphit, tourmaline, maifanite, v.v.<\/p>\n

\uff084\uff09 C\u00f4ng ngh\u1ec7 s\u1eeda \u0111\u1ed5i b\u1ec1 m\u1eb7t c\u00f3 th\u1ec3 \u0111\u00e1p \u1ee9ng \u1ee9ng d\u1ee5ng kho\u00e1ng ch\u1ea5t trong ng\u00e0nh cao su v\u00e0 nh\u1ef1a, ch\u1eb3ng h\u1ea1n nh\u01b0 quy tr\u00ecnh s\u1eeda \u0111\u1ed5i Ba tr\u1ee5c c\u00e1n, quy tr\u00ecnh s\u1eeda \u0111\u1ed5i Turbo Mill, quy tr\u00ecnh s\u1eeda \u0111\u1ed5i Pin Mill<\/a>, quy tr\u00ecnh s\u1eeda \u0111\u1ed5i gi\u00e1n \u0111o\u1ea1n M\u00e1y tr\u1ed9n t\u1ed1c \u0111\u1ed9 cao, v.v. c\u00e1c quy tr\u00ecnh s\u1eeda \u0111\u1ed5i kh\u00e1c nhau v\u00e0 c\u00e1c ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng theo c\u00e1c v\u1eadt li\u1ec7u kh\u00e1c nhau, v\u00e0 t\u1ef7 l\u1ec7 ph\u1ee7 cao nh\u1ea5t c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c v\u1edbi \u00edt ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh nh\u1ea5t. L\u01b0\u1ee3ng ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh kho\u1ea3ng 0,8-1,2%, v\u00e0 t\u1ef7 l\u1ec7 ph\u1ee7 kho\u1ea3ng 98%.<\/p>\n

Kh\u00e1i ni\u1ec7m ch\u1ebf bi\u1ebfn gi\u00e1 tr\u1ecb cao xanh c\u1ee7a b\u1ed9t kh\u00f4ng kho\u00e1ng:<\/p>\n

\uff081\uff09 \u00dd ngh\u0129a c\u1ee7a quy tr\u00ecnh xanh \uff1a Kh\u00f4, kh\u00f4ng th\u1ea3i ba ch\u1ea5t th\u1ea3i; k\u00edn kh\u00ed \u00e1p su\u1ea5t \u00e2m, kh\u00f4ng r\u00f2 r\u1ec9 b\u1ee5i v\u00e0 \u00f4 nhi\u1ec5m ti\u1ebfng \u1ed3n; t\u1ef1 \u0111\u1ed9ng h\u00f3a, tr\u00ed tu\u1ec7 v\u00e0 m\u1ea1ng; n\u00f3 c\u00f3 th\u1ec3 nh\u1eadn ra vi\u1ec7c s\u1eed d\u1ee5ng ch\u1ea5t th\u1ea3i r\u1eafn v\u00e0 ch\u1ea5t th\u1ea3i r\u1eafn c\u00f3 gi\u00e1 tr\u1ecb cao, \u0111\u1ec1 xu\u1ea5t c\u00e1c thi\u1ebft b\u1ecb ph\u00f9 h\u1ee3p theo y\u00eau c\u1ea7u. \u1ee8ng ph\u00f3 v\u1edbi nh\u1eefng thay \u0111\u1ed5i v\u1ec1 b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng v\u00e0 lao \u0111\u1ed9ng.<\/p>\n

\uff082\uff09 \u00dd ngh\u0129a c\u1ee7a gi\u00e1 tr\u1ecb cao \uff1a B\u1eaft k\u1ecbp nhu c\u1ea7u chuy\u1ec3n \u0111\u1ed5i v\u00e0 n\u00e2ng c\u1ea5p c\u1ee7a ng\u01b0\u1eddi d\u00f9ng, cung c\u1ea5p nh\u1eefng s\u1ea3n ph\u1ea9m c\u00f3 gi\u00e1 tr\u1ecb gia t\u0103ng cao d\u1ef1a tr\u00ean n\u1ec1n t\u1ea3ng khoa h\u1ecdc v\u1eadt li\u1ec7u. H\u01b0\u1edbng nghi\u00ean c\u1ee9u t\u1eadp trung v\u00e0o k\u00edch th\u01b0\u1edbc h\u1ea1t v\u00e0 s\u1ef1 ph\u00e2n b\u1ed1, h\u00ecnh d\u1ea1ng, \u0111\u1ed9 tinh khi\u1ebft, \u0111\u1ed9 ph\u00e2n t\u00e1n v\u00e0 bi\u1ebfn \u0111\u1ed5i b\u1ec1 m\u1eb7t c\u1ee7a n\u00f3, x\u00e1c \u0111\u1ecbnh c\u00f4ng ngh\u1ec7 x\u1eed l\u00fd d\u1ef1a tr\u00ean th\u00e0nh ph\u1ea7n kho\u00e1ng v\u1eadt v\u00e0 \u0111\u1eb7c \u0111i\u1ec3m c\u1ea5u tr\u00fac c\u1ee7a n\u00f3, \u0111\u1ed3ng th\u1eddi cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p t\u00f9y ch\u1ec9nh k\u1ebft h\u1ee3p v\u1edbi c\u00e1c y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 m\u00f4i tr\u01b0\u1eddng.<\/p>\n","protected":false},"excerpt":{"rendered":"

Canxi cacbonat l\u00e0 m\u1ed9t kho\u00e1ng ch\u1ea5t mu\u1ed1i v\u00f4 c\u01a1 quan tr\u1ecdng v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i, th\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cb\u1ed9t ng\u1ecdt c\u00f4ng nghi\u1ec7p\u201d, l\u00e0 m\u1ed9t trong nh\u1eefng ch\u1ea5t \u0111\u1ed9n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong m\u1ecdi t\u1ea7ng l\u1edbp x\u00e3 h\u1ed9i. Canxi cacbonat kh\u00f4ng ch\u1ec9 c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m chi ph\u00ed nguy\u00ean li\u1ec7u c\u1ee7a c\u00e1c s\u1ea3n ph\u1ea9m cao su v\u00e0 nh\u1ef1a m\u00e0 c\u00f2n c\u1ea3i thi\u1ec7n m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t c\u1ee7a nguy\u00ean li\u1ec7u cao su v\u00e0 nh\u1ef1a. C\u00e1c lo\u1ea1i canxi cacbonat kh\u00e1c nhau c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 c\u00e1c \u0111\u1eb7c t\u00ednh c\u1ee7a v\u1eadt li\u1ec7u cao su v\u00e0 nh\u1ef1a khi \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u00fang c\u00e1ch. Theo quy tr\u00ecnh s\u1ea3n xu\u1ea5t kh\u00e1c nhau, canxi cacbonat c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh canxi cacbonat n\u1eb7ng v\u00e0 canxi cacbonat nh\u1eb9.<\/p>\n","protected":false},"author":6,"featured_media":96727,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[830],"tags":[],"class_list":["post-99240","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry-news"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/99240","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/comments?post=99240"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/99240\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media\/96727"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media?parent=99240"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/categories?post=99240"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/tags?post=99240"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}