{"id":110220,"date":"2021-08-24T14:33:19","date_gmt":"2021-08-24T06:33:19","guid":{"rendered":"https:\/\/www.alpapowder.com\/110220\/"},"modified":"2021-08-25T15:35:53","modified_gmt":"2021-08-25T07:35:53","slug":"cong-nghe-bao-che-bot-barit","status":"publish","type":"post","link":"https:\/\/www.alpapowder.com\/vi\/110220\/","title":{"rendered":"C\u00f4ng ngh\u1ec7 b\u00e0o ch\u1ebf b\u1ed9t barit"},"content":{"rendered":"
Barit l\u00e0 kho\u00e1ng ch\u1ea5t ph\u1ed5 bi\u1ebfn nh\u1ea5t. Th\u00e0nh ph\u1ea7n c\u1ee7a n\u00f3 l\u00e0 bari sulfat (BaSO4\u00a0<\/sub>), c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ea1o ra trong c\u00e1c m\u1ea1ch th\u1ee7y nhi\u1ec7t nhi\u1ec7t \u0111\u1ed9 th\u1ea5p v\u00e0 \u0111\u00e1 tr\u1ea7m t\u00edch. Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc bao g\u1ed3m 65,7% BaO v\u00e0 34,3% SO3\u00a0<\/sub>, v\u00e0 c\u00f3 s\u1ef1 thay th\u1ebf t\u01b0\u01a1ng t\u1ef1 c\u1ee7a Sr, Pb v\u00e0 Ca trong th\u00e0nh ph\u1ea7n. Barit th\u01b0\u1eddng l\u00e0 c\u00e1c t\u1eadp h\u1ee3p d\u1ea1ng t\u1ea5m, d\u1ea1ng h\u1ea1t, d\u1ea1ng s\u1ee3i v\u00e0 c\u00e1c c\u1ee5m tinh th\u1ec3 d\u1ea1ng t\u1ea5m, m\u1ed9t s\u1ed1 \u00edt trong s\u1ed1 \u0111\u00f3 c\u00f3 d\u1ea1ng \u0111\u1eb7c, kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn, d\u1ea1ng tinh th\u1ec3 m\u1eadt m\u00e3 v\u00e0 gi\u1ed1ng nh\u01b0 \u0111\u1ea5t, \u0111\u1ed3ng th\u1eddi c\u0169ng c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y c\u00e1c nh\u0169 \u0111\u00e1 v\u00e0 n\u1ed1t s\u1ea7n c\u00f3 c\u1ea5u tr\u00fac gi\u1ed1ng nh\u01b0 v\u00e0nh \u0111ai \u0111\u1ed3ng t\u00e2m. .<\/p>\n Barit nguy\u00ean ch\u1ea5t kh\u00f4ng m\u00e0u v\u00e0 trong su\u1ed1t, th\u01b0\u1eddng c\u00f3 m\u00e0u tr\u1eafng, x\u00e1m, v\u00e0ng nh\u1ea1t, n\u00e2u nh\u1ea1t, v\u00e0 c\u00f3 th\u1ec3 c\u00f3 m\u00e0u xanh nh\u1ea1t, h\u1ed3ng, x\u00e1m \u0111\u1eadm, v.v. c\u00f3 l\u1eabn t\u1ea1p ch\u1ea5t. Th\u1ee7y tinh b\u00f3ng, trong su\u1ed1t \u0111\u1ebfn m\u1edd, \u0111\u1ed9 m\u00e0i m\u00f2n th\u1ea5p, che ch\u1eafn t\u1ed1t, c\u00f3 th\u1ec3 h\u1ea5p th\u1ee5 tia X v\u00e0 tia Y, b\u1ec1n v\u1ec1 m\u1eb7t h\u00f3a h\u1ecdc, tinh khi\u1ebft kh\u00f3 tan trong n\u01b0\u1edbc v\u00e0 axit.<\/p>\n Th\u1ebf gi\u1edbi gi\u00e0u t\u00e0i nguy\u00ean barit, v\u1edbi tr\u1eef l\u01b0\u1ee3ng 2 t\u1ef7 t\u1ea5n. C\u00e1c khu v\u1ef1c s\u1ea3n xu\u1ea5t barit n\u1ed5i ti\u1ebfng th\u1ebf gi\u1edbi bao g\u1ed3m: Westmanland v\u00e0 Cumbria \u1edf V\u01b0\u01a1ng qu\u1ed1c Anh, Phils Bonny \u1edf Romania, Sachsen \u1edf \u0110\u1ee9c, Tianzhu \u1edf Qu\u00fd Ch\u00e2u, Trung Qu\u1ed1c, Gongxi \u1edf H\u1ed3 Nam, Liulin \u1edf H\u1ed3 B\u1eafc v\u00e0 Qu\u1ea3ng T\u00e2y Heifenggou \u1edf Cam T\u00fac, T\u01b0\u01a1ng Ch\u00e2u, Th\u1ee7y B\u00ecnh \u1edf Thi\u1ec3m T\u00e2y , V\u00e2n v\u00e2n.<\/p>\n Barit \u0111\u01b0\u1ee3c chia th\u00e0nh barit c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao, barit si\u00eau m\u1ecbn v\u00e0 barit ho\u1ea1t \u0111\u1ed9ng si\u00eau m\u1ecbn.<\/p>\n Ch\u1ecdn tay: D\u1ef1a tr\u00ean s\u1ef1 kh\u00e1c bi\u1ec7t v\u1ec1 m\u00e0u s\u1eafc v\u00e0 t\u1ef7 tr\u1ecdng c\u1ee7a barit v\u00e0 c\u00e1c kho\u00e1ng ch\u1ea5t li\u00ean k\u1ebft, ch\u1ecdn barit d\u1ea1ng kh\u1ed1i.<\/p>\n T\u00e1ch tr\u1ecdng l\u1ef1c: Theo s\u1ef1 ch\u00eanh l\u1ec7ch t\u1ef7 tr\u1ecdng gi\u1eefa barit v\u00e0 c\u00e1c kho\u00e1ng ch\u1ea5t \u0111i k\u00e8m, qu\u1eb7ng th\u00f4 \u0111\u01b0\u1ee3c s\u00e0ng l\u1ecdc, nghi\u1ec1n nh\u1ecf, kh\u1eed c\u1eb7n, g\u00e1, b\u00e0n l\u1eafc v\u00e0 c\u00e1c quy tr\u00ecnh kh\u00e1c \u0111\u1ec3 thu \u0111\u01b0\u1ee3c s\u1ea3n ph\u1ea9m c\u00f3 c\u1ea5p \u0111\u1ed9 tr\u00ean 88%.<\/p>\n T\u00e1ch t\u1eeb t\u00ednh: N\u00f3 th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 lo\u1ea1i b\u1ecf m\u1ed9t s\u1ed1 kho\u00e1ng ch\u1ea5t t\u1eeb \u200b\u200boxit s\u1eaft v\u00e0 s\u1eed d\u1ee5ng n\u00f3 l\u00e0m nguy\u00ean li\u1ec7u th\u00f4 c\u1ee7a barit cho c\u00e1c lo\u1ea1i thu\u1ed1c d\u1ea1ng v\u00f2ng c\u1ed5 c\u1ea7n h\u00e0m l\u01b0\u1ee3ng s\u1eaft r\u1ea5t th\u1ea5p.<\/p>\n Tuy\u1ec3n n\u1ed5i: Barit c\u00f3 k\u00edch th\u01b0\u1edbc h\u1ea1t nh\u1ecf \u0111\u01b0\u1ee3c nh\u00fang v\u00e0o, lo\u1ea1i b\u1ecf t\u1ea1p ch\u1ea5t v\u1eadt l\u00fd kh\u00f4ng t\u1ed1t v\u00e0 th\u01b0\u1eddng s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p tuy\u1ec3n n\u1ed5i.<\/p>\n L\u00e0m s\u1ea1ch v\u00e0 l\u00e0m tr\u1eafng b\u1eb1ng h\u00f3a ch\u1ea5t: th\u00f4ng qua r\u1eeda tr\u00f4i axit (ho\u1eb7c ki\u1ec1m), qu\u00e1 tr\u00ecnh oxy h\u00f3a-kh\u1eed \u0111\u1ec3 lo\u1ea1i b\u1ecf cacbon v\u00e0 s\u1eaft, mangan, magi\u00ea, niken v\u00e0 c\u00e1c t\u1ea1p ch\u1ea5t kh\u00e1c trong qu\u1eb7ng.<\/p>\n Nung v\u00e0 l\u00e0m tr\u1eafng: Barit th\u1ee7y nhi\u1ec7t tr\u1ea3i qua qu\u00e1 tr\u00ecnh h\u1ea5p th\u1ee5 nhi\u1ec7t v\u00e0 n\u1ed5 \u1edf nhi\u1ec7t \u0111\u1ed9 cao \u0111\u1ec3 l\u00e0m bay h\u01a1i c\u00e1c ch\u1ea5t h\u1eefu c\u01a1 g\u00e2y m\u00e0u ph\u00e2n b\u1ed1 trong c\u00e1c tinh th\u1ec3 ho\u1eb7c khe h\u1edf c\u1ee7a barit.<\/p>\n M\u00e1y nghi\u1ec1n h\u00e0m, m\u00e1y ph\u00e2n lo\u1ea1i kh\u00f4ng kh\u00ed c\u1ee7a nh\u00e0 m\u00e1y Raymond \u2192 l\u00f2 n\u01b0\u1edbng \u2192 r\u1eeda \u2192 ng\u00e2m mu\u1ed1i lo\u00e3ng \u2192 nghi\u1ec1n b\u1ed9t \u2192 ph\u1ea3n \u1ee9ng kh\u1eed mu\u1ed1i trong \u1ea5m \u0111un n\u01b0\u1edbc \u2192 m\u00e1y \u00e9p l\u1ecdc \u2192 r\u1eeda \u2192 m\u00e1y \u00e9p l\u1ecdc \u2192 s\u1ea5y kh\u00f4 \u2192 nghi\u1ec1n \u2192 \u0111\u00f3ng g\u00f3i \u2192 s\u1ea3n ph\u1ea9m<\/p>\n M\u00e1y nghi\u1ec1n khu\u1ea5y, m\u00e1y nghi\u1ec1n rung, m\u00e1y nghi\u1ec1n bi \u2192 ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh ho\u1eb7c ch\u1ea5t k\u1ebft t\u1ee7a \u2192 hydroxit ho\u1eb7c oxit ng\u1eadm n\u01b0\u1edbc \u2192 m\u00e0ng ph\u1ee7 \u2192 r\u1eeda \u2192 s\u1ea5y kh\u00f4 \u2192 rang \u2192 s\u1eeda ch\u1eefa \u2192 s\u1ea3n ph\u1ea9m<\/p>\n L\u1edbp ph\u1ee7 h\u00f3a h\u1ecdc b\u1ec1 m\u1eb7t: c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t \u0111i\u1ec1u ch\u1ec9nh \u0111\u01b0\u1ee3c ph\u1ee7 tr\u00ean b\u1ec1 m\u1eb7t \u0111\u1ec3 thu \u0111\u01b0\u1ee3c c\u00e1c s\u1ea3n ph\u1ea9m bi\u1ebfn t\u00ednh.<\/p>\n Bi\u1ebfn \u0111\u1ed5i c\u01a1 h\u1ecdc: K\u00edch ho\u1ea1t b\u1ec1 m\u1eb7t h\u1ea1t, c\u1ea3i thi\u1ec7n ho\u1ea1t t\u00ednh c\u1ee7a BaSO4\u00a0<\/sub>v\u00e0 c\u00e1c ch\u1ea5t h\u1eefu c\u01a1 kh\u00e1c.<\/p>\n Bi\u1ebfn \u0111\u1ed5i bao g\u00f3i: B\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c h\u1ea1t \u0111\u01b0\u1ee3c bao ph\u1ee7 b\u1edfi m\u1ed9t l\u1edbp m\u00e0ng \u0111\u1ed3ng nh\u1ea5t c\u00f3 \u0111\u1ed9 d\u00e0y nh\u1ea5t \u0111\u1ecbnh.<\/p>\n S\u1eeda \u0111\u1ed5i n\u0103ng l\u01b0\u1ee3ng cao v\u00e0 s\u1eeda \u0111\u1ed5i axit-c\u01a1 h\u1ecdc: s\u1eed d\u1ee5ng tia c\u1ef1c t\u00edm, tia h\u1ed3ng ngo\u1ea1i, ph\u00f3ng x\u1ea1 h\u00e0o quang v\u00e0 chi\u1ebfu x\u1ea1 plasma \u0111\u1ec3 x\u1eed l\u00fd b\u1ec1 m\u1eb7t.<\/p>\n Thu\u1ed1c th\u1eed v\u00e0 ch\u1ea5t x\u00fac t\u00e1c, thu\u1ed1c d\u00f9ng \u0111\u1ec3 ch\u1ebf bi\u1ebfn kho\u00e1ng s\u1ea3n v\u00e0 s\u1ea3n xu\u1ea5t gi\u1ea5y, ch\u1ea5t ph\u1ee5 gia cho d\u1ea7u v\u00e0 m\u1ee1, s\u1ea3n xu\u1ea5t nh\u1ef1a, thu\u1ed1c tr\u1eeb s\u00e2u, thu\u1ed1c di\u1ec7t c\u1ecf, thu\u1ed1c di\u1ec7t n\u1ea5m, s\u1ea3n xu\u1ea5t c\u00e1c lo\u1ea1i ph\u00e1o hoa …<\/p>\n Barite th\u01b0\u1eddng t\u01b0\u01a1ng \u0111\u1ed1i tinh khi\u1ebft, m\u1ec1m, t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u1eadm \u0111\u1eb7c, th\u00e2n thi\u1ec7n v\u1ec1 m\u1eb7t h\u00f3a h\u1ecdc v\u00e0 r\u1ebb ti\u1ec1n. 80-90% s\u1ea3n l\u01b0\u1ee3ng c\u1ee7a n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0m ch\u1ea5t gia tr\u1ecdng cho b\u00f9n khoan.<\/p>\n Barit \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong s\u1ea3n xu\u1ea5t th\u1ee7y tinh \u0111\u1ec3 l\u00e0m tan ch\u1ea3y \u0111\u1ed3ng nh\u1ea5t v\u00e0 c\u1ea3i thi\u1ec7n \u0111\u1ed9 s\u00e1ng v\u00e0 \u0111\u1ed9 trong c\u1ee7a s\u1ea3n ph\u1ea9m th\u1ee7y tinh.<\/p>\n B\u1ed9t barit l\u00e0 m\u1ed9t ch\u1ea5t \u0111\u1ed9n c\u00f4ng nghi\u1ec7p th\u00f4ng th\u01b0\u1eddng v\u00e0 m\u1ed9t ch\u1ea5t l\u00e0m s\u00e1ng t\u1ed1t v\u00e0 ch\u1ea5t t\u1ea1o tr\u1ecdng l\u01b0\u1ee3ng. B\u1ed9t barit \u0111\u01b0\u1ee3c t\u1ea9y tr\u1eafng h\u00f3a h\u1ecdc l\u00e0 m\u1ed9t ch\u1ea5t m\u00e0u tr\u1eafng t\u1ed1t.<\/p>\n Barit c\u00f3 \u0111\u1eb7c t\u00ednh h\u1ea5p th\u1ee5 b\u1ee9c x\u1ea1 Y t\u1ed1t n\u00ean c\u00f3 th\u1ec3 d\u00f9ng l\u00e0m v\u1eadt li\u1ec7u che ch\u1eafn; n\u00f3 c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nh\u01b0 m\u1ed9t ch\u1ea5t k\u1ebft d\u00ednh cho c\u00e1c \u1ed1ng ch\u00e2n kh\u00f4ng nh\u01b0 TV.<\/p>\n C\u00e1c c\u00f4ng ngh\u1ec7 \u0111i\u1ec1u ch\u1ebf ch\u00ednh c\u1ee7a v\u1eadt li\u1ec7u kho\u00e1ng g\u1ed1c barit bao g\u1ed3m si\u00eau m\u1ecbn v\u00e0 bi\u1ebfn t\u00ednh b\u1ec1 m\u1eb7t, nh\u01b0ng ch\u01b0a c\u00f3 nhi\u1ec1u nghi\u00ean c\u1ee9u chuy\u00ean s\u00e2u v\u1ec1 c\u00e1c v\u1ea5n \u0111\u1ec1 l\u00fd thuy\u1ebft c\u1ee7a qu\u00e1 tr\u00ecnh ch\u1ebf bi\u1ebfn si\u00eau m\u1ecbn barit, c\u01a1 h\u1ecdc, giao di\u1ec7n h\u00f3a h\u1ecdc, bi\u1ebfn t\u00ednh pha t\u1ea1p v\u00e0 c\u00e1c qu\u00e1 tr\u00ecnh kh\u00e1c. Kho\u00e1ng s\u1ea3n barit truy\u1ec1n th\u1ed1ng ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c l\u0129nh v\u1ef1c c\u00f3 gi\u00e1 tr\u1ecb gia t\u0103ng th\u1ea5p nh\u01b0 h\u00f3a d\u1ea7u, v\u1edbi hi\u1ec7u su\u1ea5t s\u1eed d\u1ee5ng s\u1ea3n ph\u1ea9m th\u1ea5p v\u00e0 gi\u00e1 tr\u1ecb th\u1ea5p.<\/p>\n Ch\u00fang ta ph\u1ea3i chuy\u1ec3n \u1ee9ng d\u1ee5ng truy\u1ec1n th\u1ed1ng c\u1ee7a barit sang c\u00e1ch k\u1ebft h\u1ee3p th\u00e0nh ph\u1ea7n kho\u00e1ng ch\u1ea5t, c\u1ea5u tr\u00fac th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc, t\u00ednh ch\u1ea5t b\u1ec1 m\u1eb7t v\u00e0 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m li\u00ean quan kh\u00e1c, ph\u00e1t tri\u1ec3n c\u00e1c quy tr\u00ecnh s\u1eeda \u0111\u1ed5i \u0111\u01a1n gi\u1ea3n, nghi\u00ean c\u1ee9u c\u00e1c ch\u1ea5t bi\u1ebfn \u0111\u1ed5i b\u1ec1 m\u1eb7t t\u01b0\u01a1ng \u0111\u1ed1i r\u1ebb ti\u1ec1n, kh\u00f4ng \u0111\u1ed9c h\u1ea1i, v\u00e0 th\u00fac \u0111\u1ea9y s\u1ef1 ph\u00e1t tri\u1ec3n c\u1ee7a ch\u1ebf bi\u1ebfn barit, vi\u1ec7c s\u1eed d\u1ee5ng to\u00e0n di\u1ec7n barit, v\u00e0 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng c\u1ea1nh tranh c\u1ee7a b\u1ed9t qu\u1eb7ng barit.<\/p>\n <\/p>\n Ngu\u1ed3n b\u00e0i vi\u1ebft: China Powder Network<\/p>\n","protected":false},"excerpt":{"rendered":" Barit l\u00e0 kho\u00e1ng ch\u1ea5t ph\u1ed5 bi\u1ebfn nh\u1ea5t. Th\u00e0nh ph\u1ea7n c\u1ee7a n\u00f3 l\u00e0 bari sulfat (BaSO4\u00a0), c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u1ea1o ra trong c\u00e1c m\u1ea1ch th\u1ee7y nhi\u1ec7t nhi\u1ec7t \u0111\u1ed9 th\u1ea5p v\u00e0 \u0111\u00e1 tr\u1ea7m t\u00edch. Th\u00e0nh ph\u1ea7n h\u00f3a h\u1ecdc bao g\u1ed3m 65,7% BaO v\u00e0 34,3% SO3\u00a0, v\u00e0 c\u00f3 s\u1ef1 thay th\u1ebf t\u01b0\u01a1ng t\u1ef1 c\u1ee7a Sr, Pb v\u00e0 Ca trong th\u00e0nh ph\u1ea7n. Barit th\u01b0\u1eddng l\u00e0 c\u00e1c t\u1eadp h\u1ee3p d\u1ea1ng t\u1ea5m, d\u1ea1ng h\u1ea1t, d\u1ea1ng s\u1ee3i v\u00e0 c\u00e1c c\u1ee5m tinh th\u1ec3 d\u1ea1ng t\u1ea5m, m\u1ed9t s\u1ed1 \u00edt trong s\u1ed1 \u0111\u00f3 c\u00f3 d\u1ea1ng \u0111\u1eb7c, kh\u1ed1i l\u01b0\u1ee3ng l\u1edbn, d\u1ea1ng tinh th\u1ec3 m\u1eadt m\u00e3 v\u00e0 gi\u1ed1ng nh\u01b0 \u0111\u1ea5t, \u0111\u1ed3ng th\u1eddi c\u0169ng c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y c\u00e1c nh\u0169 \u0111\u00e1 v\u00e0 n\u1ed1t s\u1ea7n c\u00f3 c\u1ea5u tr\u00fac gi\u1ed1ng nh\u01b0 v\u00e0nh \u0111ai \u0111\u1ed3ng t\u00e2m. .<\/p>\n","protected":false},"author":6,"featured_media":110193,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[852],"tags":[],"class_list":["post-110220","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cong-nghiep-tin-tuc-vi"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/110220","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=110220"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/110220\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media\/110193"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media?parent=110220"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/categories?post=110220"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/tags?post=110220"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}C\u00f4ng ngh\u1ec7 b\u00e0o ch\u1ebf b\u1ed9t barit c\u00f3 \u0111\u1ed9 tinh khi\u1ebft cao<\/h4>\n
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C\u00f4ng ngh\u1ec7 b\u00e0o ch\u1ebf b\u1ed9t barit si\u00eau m\u1ecbn<\/h4>\n
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C\u00f4ng ngh\u1ec7 b\u00e0o ch\u1ebf b\u1ed9t barit ho\u1ea1t t\u00ednh si\u00eau m\u1ecbn<\/h4>\n
\u1ee8ng d\u1ee5ng c\u1ee7a b\u1ed9t barit<\/h4>\n
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Xu h\u01b0\u1edbng ph\u00e1t tri\u1ec3n c\u1ee7a c\u00f4ng ngh\u1ec7 b\u00e0o ch\u1ebf b\u1ed9t barit<\/h4>\n