{"id":34367,"date":"2024-07-04T14:04:09","date_gmt":"2024-07-04T07:04:09","guid":{"rendered":"https:\/\/ttud.com.vn\/?p=34367"},"modified":"2024-11-01T14:42:54","modified_gmt":"2024-11-01T07:42:54","slug":"yeu-cau-ky-thuat-doi-voi-phan-lan-nung-chay-theo-tieu-chuan-quoc-gia","status":"publish","type":"post","link":"https:\/\/casta.ttud.com.vn\/index.php\/yeu-cau-ky-thuat-doi-voi-phan-lan-nung-chay-theo-tieu-chuan-quoc-gia\/","title":{"rendered":"Y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt \u0111\u1ed1i v\u1edbi ph\u00e2n l\u00e2n nung ch\u1ea3y theo ti\u00eau chu\u1ea9n Qu\u1ed1c gia"},"content":{"rendered":"\n

Y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt c\u1ee7a ph\u00e2n l\u00e2n nung ch\u1ea3y d\u00f9ng cho n\u00f4ng nghi\u1ec7p h\u1eefu c\u01a1 n\u00ean theo Ti\u00eau chu\u1ea9n qu\u1ed1c gia TCVN 1078:2023 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c h\u00e0m l\u01b0\u1ee3ng cho ph\u00f9 h\u1ee3p khi s\u1ea3n xu\u1ea5t v\u00e0 s\u1eed d\u1ee5ng.<\/p>\n\n\n\n

Ph\u00e2n l\u00e2n nung ch\u1ea3y \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo ph\u01b0\u01a1ng ph\u00e1p nhi\u1ec7t, b\u1eb1ng c\u00e1ch n\u1ea5u ch\u1ea3y qu\u1eb7ng photphat v\u1edbi c\u00e1c ph\u1ee5 gia ch\u1ee9a silic v\u00e0 magi\u00ea (nh\u01b0 qu\u1eb7ng secpentin) sau \u0111\u00f3 l\u00e0m l\u1ea1nh \u0111\u1ed9t ng\u1ed9t \u0111\u1ec3 gi\u1eef s\u1ea3n ph\u1ea9m \u1edf d\u1ea1ng v\u00f4 \u0111\u1ecbnh h\u00ecnh, d\u1ec5 h\u00f2a tan trong dung d\u1ecbch axit h\u1eefu c\u01a1 do c\u00e2y tr\u1ed3ng ti\u1ebft ra.<\/p>\n\n\n\n

Do kh\u00f4ng tan trong n\u01b0\u1edbc n\u00ean ph\u00e2n l\u00e2n nung ch\u1ea3y khi b\u00f3n v\u00e0o \u0111\u1ea5t kh\u00f4ng b\u1ecb r\u1eeda tr\u00f4i, tr\u00e1nh \u0111\u01b0\u1ee3c th\u1ea5t tho\u00e1t. \u0110i\u1ec1u n\u00e0y c\u00f3 \u00fd ngh\u0129a quan tr\u1ecdng v\u1ec1 an to\u00e0n sinh th\u00e1i, kh\u00f4ng g\u00e2y ra hi\u1ec7n t\u01b0\u1ee3ng ph\u00fa d\u01b0\u1ee1ng m\u00f4i tr\u01b0\u1eddng n\u01b0\u1edbc. Tuy nhi\u00ean trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t, s\u1eed d\u1ee5ng ph\u00e2n l\u00e2n nung ch\u1ea3y ph\u1ea3i ph\u00f9 h\u1ee3p v\u1edbi c\u00e1c y\u00eau c\u1ea7u h\u01b0\u1edbng d\u1eabn trong Ti\u00eau chu\u1ea9n qu\u1ed1c gia TCVN 1078:2023 nh\u1eb1m \u0111\u1ea3m b\u1ea3o c\u00e1c ti\u00eau ch\u00ed k\u1ef9 thu\u1eadt, h\u00e0m l\u01b0\u1ee3ng ph\u00f9 h\u1ee3p trong tr\u1ed3ng tr\u1ecdt h\u1eefu c\u01a1.<\/p>\n\n\n\n

\"\"<\/p>\n\n\n\n

Y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt c\u1ee7a ph\u00e2n l\u00e2n nung ch\u1ea3y n\u00ean \u0111\u00e1p \u1ee9ng theo ti\u00eau chu\u1ea9n quy \u0111\u1ecbnh. \u1ea2nh minh h\u1ecda<\/p>\n\n\n\n

Ti\u00eau chu\u1ea9n qu\u1ed1c gia TCVN 1078:2023 do Ban k\u1ef9 thu\u1eadt ti\u00eau chu\u1ea9n qu\u1ed1c gia TCVN\/TC 134 Ph\u00e2n b\u00f3n bi\u00ean so\u1ea1n, T\u1ed5ng c\u1ee5c Ti\u00eau chu\u1ea9n \u0110o l\u01b0\u1eddng Ch\u1ea5t l\u01b0\u1ee3ng \u0111\u1ec1 ngh\u1ecb, B\u1ed9 Khoa h\u1ecdc v\u00e0 C\u00f4ng ngh\u1ec7 c\u00f4ng b\u1ed1. Ti\u00eau chu\u1ea9n n\u00e0y \u00e1p d\u1ee5ng cho ph\u00e2n l\u00e2n nung ch\u1ea3y v\u00e0 c\u0169ng quy \u0111\u1ecbnh c\u00e1c ti\u00eau ch\u00ed \u0111\u1ed1i v\u1edbi ph\u00e2n l\u00e2n nung ch\u1ea3y s\u1eed d\u1ee5ng trong tr\u1ed3ng tr\u1ecdt h\u1eefu c\u01a1. <\/p>\n\n\n\n

Theo \u0111\u00f3 y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt \u0111\u1ed1i v\u1edbi ph\u00e2n l\u00e2n nung ch\u1ea3y d\u00f9ng trong tr\u1ed3ng tr\u1ecdt h\u1eefu c\u01a1 \u0111\u01b0\u1ee3c h\u01b0\u1edbng d\u1eabn t\u1ea1i M\u1ee5c 3 c\u1ee7a Ti\u00eau chu\u1ea9n qu\u1ed1c gia TCVN 1078:2023 th\u00ec h\u00e0m l\u01b0\u1ee3ng phospho h\u1eefu hi\u1ec7u (t\u00ednh theo P2O5), % kh\u1ed1i l\u01b0\u1ee3ng, kh\u00f4ng nh\u1ecf h\u01a1n m\u1ee9c 15,0; H\u00e0m l\u01b0\u1ee3ng canxi (t\u00ednh theo CaO), % kh\u1ed1i l\u01b0\u1ee3ng, kh\u00f4ng nh\u1ecf h\u01a1n m\u1ee9c 26,0; H\u00e0m l\u01b0\u1ee3ng magie (t\u00ednh theo MgO), % kh\u1ed1i l\u01b0\u1ee3ng, kh\u00f4ng nh\u1ecf h\u01a1n m\u1ee9c 14,0; C\u1ee1 h\u1ea1t (\u0111\u1ed9 m\u1ecbn), % kh\u1ed1i l\u01b0\u1ee3ng, kh\u00f4ng nh\u1ecf h\u01a1n; D\u1ea1ng b\u1ed9t, d\u1ea1ng h\u1ea1t, qua s\u00e0ng l\u1ed7 tr\u00f2n, c\u1ee1 l\u1ed7 \u2264 3 mm ph\u1ea3i \u0111\u1ea1t m\u1ee9c 90,0; D\u1ea1ng vi\u00ean, qua s\u00e0ng l\u1ed7 vu\u00f4ng, c\u1ee1 l\u1ed7 \u2264 5 mm ph\u1ea3i \u0111\u1ea1t m\u1ee9c 90,0; \u0110\u1ed9 \u1ea9m, % kh\u1ed1i l\u01b0\u1ee3ng, kh\u00f4ng l\u1edbn h\u01a1n \u0111\u1ed1i v\u1edbi d\u1ea1ng b\u1ed9t, d\u1ea1ng h\u1ea1t ph\u1ea3i \u0111\u1ea1t m\u1ee9c 5,0, d\u1ea1ng vi\u00ean ph\u1ea3i \u0111\u1ea1t m\u1ee9c 1,0; H\u00e0m l\u01b0\u1ee3ng cadimi (Cd), mg\/kg, kh\u00f4ng l\u1edbn h\u01a1n m\u1ee9c 12,0; Nguy\u00ean li\u1ec7u s\u1ea3n xu\u1ea5t c\u00f3 ngu\u1ed3n g\u1ed1c t\u1eeb t\u1ef1 nhi\u00ean; Kh\u00f4ng s\u1eed d\u1ee5ng h\u00f3a ch\u1ea5t trong qu\u00e1 tr\u00ecnh s\u1ea3n xu\u1ea5t.<\/p>\n\n\n\n

\u0110\u1ec3 x\u00e1c \u0111\u1ecbnh h\u00e0m l\u01b0\u1ee3ng phospho h\u1eefu hi\u1ec7u c\u1ea7n ho\u00e0 tan ph\u00e2n l\u00e2n nung ch\u1ea3y b\u1eb1ng dung d\u1ecbch axit citric 2%. K\u1ebft t\u1ee7a ion phosphat b\u1eb1ng amoni molipdat trong m\u00f4i tr\u01b0\u1eddng axit nitric, d\u00f9ng amoni hydroxit v\u1edbi l\u01b0\u1ee3ng d\u01b0 \u0111\u1ec3 ho\u00e0 tan k\u1ebft t\u1ee7a. Sau \u0111\u00f3, d\u00f9ng h\u1ed7n h\u1ee3p magi\u00ea k\u1ebft t\u1ee7a ion phosphat d\u01b0\u1edbi d\u1ea1ng NH4MgPO4. L\u1ecdc, r\u1eeda, nung k\u1ebft t\u1ee7a NH4MgPO4. K\u1ebft t\u1ee7a sau khi nung \u1edf d\u1ea1ng Mg2P2O7, c\u00e2n v\u00e0 t\u00ednh ra h\u00e0m l\u01b0\u1ee3ng phospho h\u1eefu hi\u1ec7u (theo P2O5).<\/p>\n\n\n\n

V\u1edbi h\u00e0m l\u01b0\u1ee3ng canxi oxit, magi\u00ea oxit c\u1ea7n ph\u00e2n h\u1ee7y v\u00e0 chuy\u1ec3n h\u00f3a canxi oxit, magi\u00ea oxit trong m\u1eabu ph\u00e2n b\u00f3n b\u1eb1ng h\u1ed7n h\u1ee3p axit nitric v\u00e0 axit clohydric \u0111\u1eadm \u0111\u1eb7c. X\u00e1c \u0111\u1ecbnh h\u00e0m l\u01b0\u1ee3ng canxi oxit, magi\u00ea oxit trong dung d\u1ecbch b\u1eb1ng ph\u00e9p chu\u1ea9n \u0111\u1ed9 t\u1ea1o ph\u1ee9c v\u1edbi EDTA (Ethylenediaminetetraacetic acid).<\/p>\n\n\n\n

Tr\u1eeb khi c\u00f3 quy \u0111\u1ecbnh kh\u00e1c, trong qu\u00e1 tr\u00ecnh ph\u00e2n t\u00edch ch\u1ec9 s\u1eed d\u1ee5ng c\u00e1c h\u00f3a ch\u1ea5t, thu\u1ed1c th\u1eed c\u00f3 c\u1ea5p \u0111\u1ed9 tinh khi\u1ebft ph\u00e2n t\u00edch v\u00e0 n\u01b0\u1edbc c\u1ea5t ph\u00f9 h\u1ee3p v\u1edbi TCVN 4851 (ISO 3696) ho\u1eb7c n\u01b0\u1edbc c\u00f3 \u0111\u1ed9 tinh khi\u1ebft t\u01b0\u01a1ng \u0111\u01b0\u01a1ng.<\/p>\n\n\n\n

C\u00f2n \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh c\u1ee1 h\u1ea1t (\u0111\u1ed9 m\u1ecbn), ng\u01b0\u1eddi th\u1ef1c hi\u1ec7n c\u1ea7n c\u00e2n kho\u1ea3ng 250g m\u1eabu \u0111\u00e3 s\u1ea5y kh\u00f4 (ch\u00ednh x\u00e1c \u0111\u1ebfn 0,01g). L\u1ef1a ch\u1ecdn s\u00e0ng (5.3.1.1) ho\u1eb7c s\u00e0ng (5.3.1.2) t\u00f9y theo d\u1ea1ng m\u1eabu (d\u1ea1ng b\u1ed9t, d\u1ea1ng h\u1ea1t ho\u1eb7c d\u1ea1ng vi\u00ean). \u0110\u1ed5 m\u1eabu l\u00ean s\u00e0ng. \u0110\u1eady n\u1eafp s\u00e0ng v\u00e0 ti\u1ebfn h\u00e0nh s\u00e0ng cho \u0111\u1ebfn khi kh\u00f4ng th\u1ea5y m\u1eabu l\u1ecdt qua s\u00e0ng. C\u00e2n ph\u1ea7n c\u00f2n l\u1ea1i tr\u00ean s\u00e0ng, ch\u00ednh x\u00e1c \u0111\u1ebfn 0,01g. Ngo\u00e0i ra, \u0111\u1ed9 \u1ea9m \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo TCVN 9297 v\u00e0 h\u00e0m l\u01b0\u1ee3ng cadimi \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo TCVN 9291.<\/p>\n\n\n\n

Ti\u00eau chu\u1ea9n c\u0169ng h\u01b0\u1edbng d\u1eabn v\u1ec1 bao g\u00f3i l\u00e0 ph\u00e2n l\u00e2n nung ch\u1ea3y \u0111\u01b0\u1ee3c \u0111\u00f3ng v\u00e0o bao. Kh\u1ed1i l\u01b0\u1ee3ng bao t\u00f9y theo nh\u00e0 s\u1ea3n xu\u1ea5t nh\u01b0ng sai l\u1ec7ch kh\u1ed1i l\u01b0\u1ee3ng kh\u00f4ng qu\u00e1 \u00b1 0,5%. Bao ch\u1ee9a ph\u00e2n l\u00e2n nung ch\u1ea3y ph\u1ea3i \u0111\u1ea3m b\u1ea3o b\u1ec1n v\u00e0 c\u00e1ch \u1ea9m.<\/p>\n\n\n\n

Tr\u00ean nh\u00e3n ph\u1ea3i c\u00f3 \u00edt nh\u1ea5t c\u00e1c th\u00f4ng tin: C\u01a1 s\u1edf s\u1ea3n xu\u1ea5t; T\u00ean s\u1ea3n ph\u1ea9m; D\u1ea1ng s\u1ea3n ph\u1ea9m; H\u00e0m l\u01b0\u1ee3ng phospho h\u1eefu hi\u1ec7u (t\u00ednh theo P2O5), h\u00e0m l\u01b0\u1ee3ng canxi (t\u00ednh theo CaO), h\u00e0m l\u01b0\u1ee3ng magie (t\u00ednh theo MgO), h\u00e0m l\u01b0\u1ee3ng cadimi (Cd) v\u00e0 \u0111\u1ed9 \u1ea9m; Ng\u00e0y s\u1ea3n xu\u1ea5t, h\u1ea1n s\u1eed d\u1ee5ng; Kh\u1ed1i l\u01b0\u1ee3ng t\u1ecbnh; Kh\u1ed1i l\u01b0\u1ee3ng t\u1ecbnh; Vi\u1ec7n d\u1eabn ti\u00eau chu\u1ea9n TCVN 1078:2023.<\/p>\n\n\n\n

Ti\u00eau chu\u1ea9n c\u0169ng quy \u0111\u1ecbnh ph\u00e2n l\u00e2n nung ch\u1ea3y ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1ec3 \u1edf n\u01a1i kh\u00f4 r\u00e1o, c\u00f3 m\u00e1i che v\u00e0 v\u1eadn chuy\u1ec3n b\u1eb1ng c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n c\u00f3 che ch\u1eafn, \u0111\u1ea3m b\u1ea3o kh\u00f4.<\/p>\n\n\n\n

\u00a0An D\u01b0\u01a1ng<\/strong><\/p>\n\n\n\n

https:\/\/vietq.vn\/yeu-cau-ky-thuat-doi-voi-phan-lan-nung-chay-theo-tieu-chuan-viet-nam-d219238.html<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Y\u00eau c\u1ea7u k\u1ef9 thu\u1eadt c\u1ee7a ph\u00e2n l\u00e2n nung ch\u1ea3y d\u00f9ng cho n\u00f4ng nghi\u1ec7p h\u1eefu c\u01a1 n\u00ean theo Ti\u00eau chu\u1ea9n qu\u1ed1c gia TCVN 1078:2023 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o c\u00e1c h\u00e0m l\u01b0\u1ee3ng cho ph\u00f9 h\u1ee3p khi s\u1ea3n xu\u1ea5t v\u00e0 s\u1eed d\u1ee5ng. Ph\u00e2n l\u00e2n nung ch\u1ea3y \u0111\u01b0\u1ee3c s\u1ea3n xu\u1ea5t theo ph\u01b0\u01a1ng ph\u00e1p nhi\u1ec7t, b\u1eb1ng c\u00e1ch n\u1ea5u ch\u1ea3y qu\u1eb7ng photphat […]<\/p>\n","protected":false},"author":26,"featured_media":34368,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-34367","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/34367","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/users\/26"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=34367"}],"version-history":[{"count":1,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/34367\/revisions"}],"predecessor-version":[{"id":34369,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/34367\/revisions\/34369"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media\/34368"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=34367"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=34367"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=34367"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}