{"id":126610,"date":"2023-03-28T13:35:35","date_gmt":"2023-03-28T05:35:35","guid":{"rendered":"https:\/\/www.alpapowder.com\/126610\/"},"modified":"2023-03-28T13:35:36","modified_gmt":"2023-03-28T05:35:36","slug":"nghien-nguyen-lieu-chiu-lua","status":"publish","type":"post","link":"https:\/\/www.alpapowder.com\/vi\/126610\/","title":{"rendered":"Nghi\u1ec1n nguy\u00ean li\u1ec7u ch\u1ecbu l\u1eeda"},"content":{"rendered":"

\"\"<\/p>\n

Nghi\u1ec1n l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh thi\u1ebft y\u1ebfu trong ng\u00e0nh c\u00f4ng nghi\u1ec7p v\u1eadt li\u1ec7u ch\u1ecbu l\u1eeda. Nguy\u00ean li\u1ec7u giao cho nh\u00e0 m\u00e1y t\u1eeb d\u1ea1ng b\u1ed9t \u0111\u1ebfn kho\u1ea3ng 350mm, \u0111a s\u1ed1 l\u00e0 d\u1ea1ng kh\u1ed1i tr\u00ean 25mm. Qu\u00e1 tr\u00ecnh nghi\u1ec1n v\u00e0 l\u1ef1a ch\u1ecdn nguy\u00ean li\u1ec7u trong nh\u00e0 m\u00e1y l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 s\u1ea3n xu\u1ea5t c\u00e1c s\u1ea3n ph\u1ea9m ch\u1ea5t l\u01b0\u1ee3ng cao, c\u00f3 \u1ea3nh h\u01b0\u1edfng tr\u1ef1c ti\u1ebfp \u0111\u1ebfn c\u00e1c t\u00ednh ch\u1ea5t c\u1ee7a s\u1ea3n ph\u1ea9m. Ngo\u00e0i ra, t\u1eeb quan \u0111i\u1ec3m k\u1ebf to\u00e1n chi ph\u00ed, \u0111i\u1ec7n n\u0103ng ti\u00eau th\u1ee5 c\u1ee7a thi\u1ebft b\u1ecb nghi\u1ec1n v\u00e0 nghi\u1ec1n chi\u1ebfm m\u1ed9t t\u1ef7 l\u1ec7 l\u1edbn. \u0110\u1ec3 ti\u1ebft ki\u1ec7m n\u0103ng l\u01b0\u1ee3ng v\u00e0 gi\u1ea3m gi\u00e1 th\u00e0nh ph\u1ea3i ch\u00fa \u00fd \u0111\u1ebfn qu\u00e1 tr\u00ecnh nghi\u1ec1n.<\/p>\n

B\u1ea3n ch\u1ea5t c\u1ee7a qu\u00e1 tr\u00ecnh nghi\u1ec1n li\u00ean quan \u0111\u1ebfn c\u00e1c y\u1ebfu t\u1ed1 sau, \u0111\u00f3 l\u00e0 kh\u1eafc ph\u1ee5c s\u1ee9c c\u0103ng b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c h\u1ea1t b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u v\u00e0 kh\u1eafc ph\u1ee5c l\u1ef1c h\u00fat Coulomb gi\u1eefa c\u00e1c h\u1ea1t b\u00ean trong v\u1eadt li\u1ec7u. B\u1eaft \u0111\u1ea7u t\u1eeb kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n v\u1ec1 h\u1ec7 th\u1ed1ng ph\u00e2n t\u00e1n v\u1eadt l\u00fd v\u00e0 h\u00f3a h\u1ecdc silicat, kh\u00f4ng kh\u00f3 \u0111\u1ec3 nh\u1eadn th\u1ea5y r\u1eb1ng c\u00e1c h\u1ea1t c\u1ee7a v\u1eadt li\u1ec7u nghi\u1ec1n v\u1eabn c\u00f2n r\u1ea5t l\u1edbn khi ch\u00fang \u0111\u01b0\u1ee3c nghi\u1ec1n l\u1ea7n \u0111\u1ea7u ti\u00ean, do \u0111\u00f3 n\u0103ng l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t v\u00e0 b\u1ec1 m\u1eb7t c\u1ee7a c\u00e1c h\u1ea1t nh\u1ecf. , Kh\u00f3 nghi\u1ec1n v\u1eadt li\u1ec7u c\u00f3 k\u00edch th\u01b0\u1edbc d\u01b0\u1edbi 1\u03bcm (micron), h\u1ea1t c\u00e0ng nh\u1ecf n\u0103ng l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t c\u00e0ng cao n\u00ean khi nghi\u1ec1n m\u1ecbn s\u1ebd ti\u00eau t\u1ed1n nhi\u1ec1u n\u0103ng l\u01b0\u1ee3ng h\u01a1n \u0111\u1ec3 th\u1eafng n\u0103ng l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t. Ngo\u00e0i ra, trong qu\u00e1 tr\u00ecnh nghi\u1ec1n m\u1ecbn, do chuy\u1ec3n \u0111\u1ed9ng nhi\u1ec7t c\u1ee7a c\u00e1c h\u1ea1t \u0111\u01b0\u1ee3c t\u0103ng t\u1ed1c, x\u00e1c su\u1ea5t va ch\u1ea1m c\u1ee7a c\u00e1c h\u1ea1t t\u0103ng l\u00ean, \u0111\u1ed3ng th\u1eddi c\u0169ng c\u00f3 th\u1ec3 x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng k\u1ebft t\u1ee5 v\u00e0 \u0111\u00f4ng t\u1ee5. Do \u0111\u00f3, quy tr\u00ecnh nghi\u1ec1n ph\u1ea3i \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c ch\u00ednh x\u00e1c, ph\u01b0\u01a1ng ph\u00e1p v\u00e0 thi\u1ebft b\u1ecb nghi\u1ec1n ph\u1ea3i \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn theo m\u1ee9c \u0111\u1ed9 ph\u00e2n t\u00e1n c\u1ee7a s\u1ea3n ph\u1ea9m cu\u1ed1i c\u00f9ng.<\/p>\n

M\u1ee5c \u0111\u00edch nghi\u1ec1n:
\n(1) Nghi\u1ec1n l\u00e0 m\u1ed9t li\u00ean k\u1ebft ho\u1ea1t \u0111\u1ed9ng quan tr\u1ecdng trong qu\u00e1 tr\u00ecnh l\u00e0m gi\u00e0u. Khi t\u00e1ch v\u00e0 l\u00e0m gi\u00e0u c\u00e1c h\u1ea1t c\u00f3 c\u00f9ng th\u00e0nh ph\u1ea7n t\u1eeb qu\u1eb7ng th\u00f4 \u0111\u01b0\u1ee3c t\u1ed5ng h\u1ee3p b\u1edfi hai ho\u1eb7c nhi\u1ec1u kho\u00e1ng ch\u1ea5t kh\u00e1c nhau, qu\u1eb7ng th\u00f4 ph\u1ea3i \u0111\u01b0\u1ee3c nghi\u1ec1n tr\u01b0\u1edbc \u0111\u1ec3 ph\u00e2n bi\u1ec7t theo lo\u1ea1i.
\n(2) \u0110\u1ec3 th\u00fac \u0111\u1ea9y s\u1ef1 t\u01b0\u01a1ng t\u00e1c gi\u1eefa c\u00e1c pha kh\u00e1c nhau, ho\u1eb7c ph\u00e2n t\u00e1n \u0111\u1ec1u c\u00e1c h\u1ea1t r\u1eafn v\u00e0o ch\u1ea5t l\u1ecfng, v\u00ed d\u1ee5, chu\u1ea9n b\u1ecb b\u00f9n.
\n(3) Chu\u1ea9n b\u1ecb c\u00e1c k\u00edch th\u01b0\u1edbc h\u1ea1t kh\u00e1c nhau theo y\u00eau c\u1ea7u c\u1ee7a quy tr\u00ecnh. T\u0103ng c\u00e1c khuy\u1ebft t\u1eadt m\u1ea1ng v\u00e0 b\u1ec1 m\u1eb7t c\u1ee5 th\u1ec3 c\u1ee7a v\u1eadt li\u1ec7u, \u0111\u1ea9y nhanh c\u00e1c ph\u1ea3n \u1ee9ng v\u1eadt l\u00fd v\u00e0 h\u00f3a h\u1ecdc v\u00e0 th\u00fac \u0111\u1ea9y qu\u00e1 tr\u00ecnh thi\u00eau k\u1ebft.
\nC\u00e1c ph\u01b0\u01a1ng ph\u00e1p nghi\u1ec1n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh b\u1ed1n lo\u1ea1i sau: \u00e9p \u0111\u00f9n, t\u00e1c \u0111\u1ed9ng, nghi\u1ec1n v\u00e0 t\u00e1ch. Ch\u1ee9c n\u0103ng c\u1ee7a c\u00e1c m\u00e1y nghi\u1ec1n kh\u00e1c nhau l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a c\u00e1c ph\u01b0\u01a1ng ph\u00e1p tr\u00ean.<\/p>\n

Nghi\u1ec1n \u0111\u01b0\u1ee3c chia th\u00e0nh nghi\u1ec1n kh\u00f4 v\u00e0 nghi\u1ec1n \u01b0\u1edbt. Nghi\u1ec1n \u01b0\u1edbt ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong s\u1ea3n xu\u1ea5t g\u1ed1m s\u1ee9 ho\u1eb7c v\u1eadt li\u1ec7u ch\u1ecbu l\u1eeda \u0111\u1eb7c bi\u1ec7t. So v\u1edbi nghi\u1ec1n kh\u00f4, n\u00f3 c\u00f3 nh\u1eefng \u01b0u \u0111i\u1ec3m sau:
\n(1) T\u1ef7 l\u1ec7 nghi\u1ec1n l\u1edbn v\u00e0 k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a v\u1eadt li\u1ec7u nghi\u1ec1n nh\u1ecf;
\n(2) Hi\u1ec7u qu\u1ea3 nghi\u1ec1n cao, kh\u00f4ng d\u1ec5 x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng “t\u01b0\u1eddng b\u1ed9t” trong qu\u00e1 tr\u00ecnh nghi\u1ec1n kh\u00f4 (nh\u01b0ng khi k\u00edch th\u01b0\u1edbc h\u1ea1t c\u1ee7a s\u1ea3n ph\u1ea9m nghi\u1ec1n nh\u1ecf h\u01a1n 0,01mm th\u00ec c\u0169ng s\u1ebd x\u1ea3y ra hi\u1ec7n t\u01b0\u1ee3ng k\u1ebft t\u1ee5 b\u1ed9t);
\n(3) T\u1ed5n hao do ma s\u00e1t c\u1ee7a thi\u1ebft b\u1ecb v\u00e0 th\u00e2n m\u00e1y m\u00e0i nh\u1ecf;
\n(4) Ch\u1ed1ng b\u1ee5i t\u1ed1t, c\u00f3 l\u1ee3i cho s\u1ea3n xu\u1ea5t v\u0103n minh v\u00e0 t\u1ef1 \u0111\u1ed9ng h\u00f3a quy tr\u00ecnh.<\/p>\n

Ngo\u00e0i ra, c\u00f2n c\u00f3 nghi\u1ec1n nhi\u1ec7t \u0111\u1ed9 th\u1ea5p, nghi\u1ec1n kh\u00f4, nghi\u1ec1n t\u1ef1 sinh d\u1ef1a tr\u00ean t\u00e1c \u0111\u1ed9ng v\u00e0 ma s\u00e1t c\u1ee7a v\u1eadt li\u1ec7u nghi\u1ec1n, \u0111\u01b0\u1ee3c ph\u00e2n lo\u1ea1i theo m\u00f4i tr\u01b0\u1eddng nghi\u1ec1n.<\/p>\n

Khi nghi\u1ec1n nguy\u00ean li\u1ec7u th\u00f4, m\u1eadt \u0111\u1ed9 th\u1ec3 t\u00edch v\u00e0 ch\u1ec9 s\u1ed1 c\u01b0\u1eddng \u0111\u1ed9 c\u1ee7a v\u1eadt li\u1ec7u c\u00f3 \u00fd ngh\u0129a l\u1edbn \u0111\u1ed1i v\u1edbi vi\u1ec7c l\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb nghi\u1ec1n v\u00e0 ph\u00e2n t\u00edch hi\u1ec7u qu\u1ea3 nghi\u1ec1n.<\/p>\n","protected":false},"excerpt":{"rendered":"

R\u1ea5t kh\u00f3 \u0111\u1ec3 nghi\u1ec1n n\u00e1t v\u1eadt li\u1ec7u d\u01b0\u1edbi 1\u03bcm (micron), h\u1ea1t c\u00e0ng nh\u1ecf th\u00ec n\u0103ng l\u01b0\u1ee3ng b\u1ec1 m\u1eb7t c\u00e0ng cao<\/p>\n","protected":false},"author":7,"featured_media":126574,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[852],"tags":[],"class_list":["post-126610","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\/126610","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\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/comments?post=126610"}],"version-history":[{"count":0,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/posts\/126610\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media\/126574"}],"wp:attachment":[{"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/media?parent=126610"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/categories?post=126610"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alpapowder.com\/vi\/wp-json\/wp\/v2\/tags?post=126610"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}