{"id":111253,"date":"2021-09-21T13:11:50","date_gmt":"2021-09-21T06:11:50","guid":{"rendered":"https:\/\/hocvienmo.thietkewebquangninh.vn\/?p=111253"},"modified":"2021-09-21T13:11:50","modified_gmt":"2021-09-21T06:11:50","slug":"hoi-dong-nghiem-thu-de-tai-trong-diem-cap-nha-nuoc","status":"publish","type":"post","link":"https:\/\/imsat.vn\/?p=111253","title":{"rendered":"H\u1ed9i \u0111\u1ed3ng nghi\u1ec7m thu \u0111\u1ec1 t\u00e0i tr\u1ecdng \u0111i\u1ec3m c\u1ea5p Nh\u00e0 n\u01b0\u1edbc"},"content":{"rendered":"

Ng\u00e0y 8\/5\/2014, t\u1ea1i V\u0103n ph\u00f2ng B\u1ed9 C\u00f4ng Th\u01b0\u01a1ng, H\u1ed9i \u0111\u1ed3ng Khoa h\u1ecdc c\u1ea5p Nh\u00e0 n\u01b0\u1edbc \u0111\u00e3 t\u1ed5 ch\u1ee9c H\u1ed9i ngh\u1ecb nghi\u1ec7m thu \u0111\u1ec1 t\u00e0i: &quot;Nghi\u00ean c\u1ee9u \u0111\u1ec1 xu\u1ea5t c\u00e1c gi\u1ea3i ph\u00e1p c\u00f4ng ngh\u1ec7 c\u01a1 gi\u1edbi ho\u00e1 khai th\u00e1c v\u00e0 tuy\u1ec3n h\u1ee3p l\u00fd cho c\u00e1c m\u1ecf qu\u1eb7ng s\u1eaft quy m\u00f4 nh\u1ecf ph\u00eda B\u1eafc Vi\u1ec7t Nam&quot; do ThS. L\u01b0u V\u0103n Th\u1ef1c l\u00e0m ch\u1ee7 nhi\u1ec7m \u0111\u1ec1 t\u00e0i. \u0110\u00e2y l\u00e0 \u0111\u1ec1 t\u00e0i thu\u1ed9c Ch\u01b0\u01a1ng tr\u00ecnh khoa h\u1ecdc v\u00e0 c\u00f4ng ngh\u1ec7 tr\u1ecdng \u0111i\u1ec3m: &quot;\u0110\u1ed5i m\u1edbi v\u00e0 hi\u1ec7n \u0111\u1ea1i ho\u00e1 c\u00f4ng ngh\u1ec7 trong ng\u00e0nh c\u00f4ng nghi\u1ec7p khai kho\u00e1ng \u0111\u1ebfn n\u0103m 2015, t\u1ea7m nh\u00ecn \u0111\u1ebfn n\u0103m 2025&quot;. Th\u1eddi gian th\u1ef1c hi\u1ec7n \u0111\u1ec1 t\u00e0i l\u00e0 24 th\u00e1ng t\u1eeb 1\/2012 \u0111\u1ebfn 12\/2013.<\/strong><\/p>\n

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\u00a0\u00a0\u00a0\u00a0 Ng\u00e0y 8\/5\/2014, t\u1ea1i V\u0103n ph\u00f2ng B\u1ed9 C\u00f4ng Th\u01b0\u01a1ng, H\u1ed9i \u0111\u1ed3ng Khoa h\u1ecdc c\u1ea5p Nh\u00e0 n\u01b0\u1edbc \u0111\u00e3 t\u1ed5 ch\u1ee9c H\u1ed9i ngh\u1ecb nghi\u1ec7m thu \u0111\u1ec1 t\u00e0i: “Nghi\u00ean c\u1ee9u \u0111\u1ec1 xu\u1ea5t c\u00e1c gi\u1ea3i ph\u00e1p c\u00f4ng ngh\u1ec7 c\u01a1 gi\u1edbi ho\u00e1 khai th\u00e1c v\u00e0 tuy\u1ec3n h\u1ee3p l\u00fd cho c\u00e1c m\u1ecf qu\u1eb7ng s\u1eaft quy m\u00f4 nh\u1ecf ph\u00eda B\u1eafc Vi\u1ec7t Nam<\/em>” do ThS. L\u01b0u V\u0103n Th\u1ef1c l\u00e0m ch\u1ee7 nhi\u1ec7m \u0111\u1ec1 t\u00e0i. \u0110\u00e2y l\u00e0 \u0111\u1ec1 t\u00e0i thu\u1ed9c Ch\u01b0\u01a1ng tr\u00ecnh khoa h\u1ecdc v\u00e0 c\u00f4ng ngh\u1ec7 tr\u1ecdng \u0111i\u1ec3m: “\u0110\u1ed5i m\u1edbi v\u00e0 hi\u1ec7n \u0111\u1ea1i ho\u00e1 c\u00f4ng ngh\u1ec7 trong ng\u00e0nh c\u00f4ng nghi\u1ec7p khai kho\u00e1ng \u0111\u1ebfn n\u0103m 2015, t\u1ea7m nh\u00ecn \u0111\u1ebfn n\u0103m 2025”. Th\u1eddi gian th\u1ef1c hi\u1ec7n \u0111\u1ec1 t\u00e0i l\u00e0 24 th\u00e1ng t\u1eeb 1\/2012 \u0111\u1ebfn 12\/2013.<\/span><\/p>\n

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\n\u0110\u1ec1 t\u00e0i \u0111\u00e3 ho\u00e0n th\u00e0nh to\u00e0n b\u1ed9 n\u1ed9i dung nghi\u00ean c\u1ee9u theo \u0111\u1ec1 c\u01b0\u01a1ng \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00ea duy\u1ec7t, v\u1edbi c\u00e1c n\u1ed9i dung ch\u00ednh nh\u01b0 sau: <\/p>\n

– \u0110\u00e1nh gi\u00e1 t\u1ed5ng quan v\u1ec1 c\u00f4ng ngh\u1ec7 c\u01a1 gi\u1edbi ho\u00e1 khai th\u00e1c, tuy\u1ec3n t\u1ea1i c\u00e1c m\u1ecf qu\u1eb7ng s\u1eaft tr\u00ean th\u1ebf gi\u1edbi v\u00e0 kh\u1ea3 n\u0103ng \u00e1p d\u1ee5ng c\u01a1 gi\u1edbi ho\u00e1 t\u1ea1i Vi\u1ec7t Nam;<\/p>\n

– Kh\u1ea3o s\u00e1t, t\u1ed5ng quan v\u1ec1 \u0111i\u1ec1u ki\u1ec7n \u0111\u1ecba ch\u1ea5t, k\u1ef9 thu\u1eadt c\u00f3 li\u1ec7n quan \u1edf c\u00e1c m\u1ecf qu\u1eb7ng s\u1eaft quy m\u00f4 nh\u1ecf ph\u00eda B\u1eafc Vi\u1ec7t Nam t\u1ea1i c\u00e1c m\u1ecf \u1edf L\u00e0o Cai, Y\u00ean B\u00e1i, H\u00e0 Giang, Cao B\u1eb1ng, B\u1eafc K\u1ea1n, Th\u00e1i Nguy\u00ean;<\/p>\n

– Nghi\u00ean c\u1ee9u \u0111\u00e1nh gi\u00e1 hi\u1ec7n tr\u1ea1ng c\u00f4ng ngh\u1ec7 khai th\u00e1c v\u00e0 tuy\u1ec3n t\u1ea1i c\u00e1c m\u1ecf qu\u1eb7ng s\u1eaft ph\u00eda B\u1eafc Vi\u1ec7t Nam;<\/p>\n

– Nghi\u00ean c\u1ee9u l\u1ef1a ch\u1ecdn v\u00e0 \u0111\u1ec1 xu\u1ea5t c\u00e1c gi\u1ea3i ph\u00e1p c\u00f4ng ngh\u1ec7 c\u01a1 gi\u1edbi ho\u00e1 khai th\u00e1c v\u00e0 tuy\u1ec3n t\u1ea1i c\u00e1c m\u1ecf s\u1eaft quy m\u00f4 nh\u1ecf ph\u00eda B\u1eafc Vi\u1ec7t Nam;
\n– Nghi\u00ean c\u1ee9u, t\u00ednh to\u00e1n th\u1eed nghi\u1ec7m t\u1ea1i m\u1ecf s\u1eaft N\u00e0 L\u0169ng v\u00e0 m\u1ecf s\u1eaft K\u00edp T\u01b0\u1edbc;<\/p>\n

T\u1ea1i H\u1ed9i ngh\u1ecb, \u0111\u1ea1i di\u1ec7n nh\u00f3m th\u1ef1c hi\u1ec7n \u0111\u1ec1 t\u00e0i tr\u00ecnh b\u00e0y nh\u1eefng k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u ch\u00ednh c\u1ee7a \u0111\u1ec1 t\u00e0i, n\u00eau nh\u1eefng \u01b0u, nh\u01b0\u1ee3c \u0111i\u1ec3m trong qu\u00e1 tr\u00ecnh \u0111\u00e1nh gi\u00e1 hi\u1ec7n tr\u1ea1ng c\u00f4ng t\u00e1c khai th\u00e1c \u1edf c\u00e1c m\u1ecf qu\u1eb7ng s\u1eaft \u1edf khu v\u1ef1c ph\u00eda B\u1eafc Vi\u1ec7t Nam. \u0110\u1ed3ng th\u1eddi, \u0111\u1ec1 xu\u1ea5t c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt c\u00f4ng ngh\u1ec7 c\u01a1 gi\u1edbi h\u00f3a kh\u00e2u khai th\u00e1c v\u00e0 tuy\u1ec3n cho c\u00e1c m\u1ecf khai th\u00e1c qu\u1eb7ng s\u1eaft c\u00f3 quy m\u00f4 khai th\u00e1c nh\u1ecf \u1edf ph\u00eda B\u1eafc Vi\u1ec7t Nam.
\n C\u00e1c n\u1ed9i dung \u0111\u01b0\u1ee3c \u0111\u1ec1 t\u00e0i nghi\u00ean c\u1ee9u \u0111\u1ec1 xu\u1ea5t nh\u01b0 sau:<\/p>\n

* \u0110\u1ed1i v\u1edbi kh\u00e2u khai th\u00e1c:<\/p>\n

D\u1ef1a tr\u00ean k\u1ebft qu\u1ea3 kh\u1ea3o s\u00e1t, ph\u00e2n t\u00edch, \u0111\u00e1nh gi\u00e1 v\u00e0 nghi\u00ean c\u1ee9u \u0111\u1ec1 t\u00e0i:<\/p>\n

– \u0110\u1ed1i v\u1edbi \u0111i\u1ec1u ki\u1ec7n c\u00e1c m\u1ecf c\u00f3 d\u1ea1ng tr\u00ean s\u01b0\u1eddn n\u00fai (KM1) v\u00e0 (KM2), \u0111\u1ec1 t\u00e0i ki\u1ebfn ngh\u1ecb l\u1ef1a ch\u1ecdn HTKT xu\u1ed1ng s\u00e2u d\u1ecdc m\u1ed9t ho\u1eb7c 2 b\u1edd c\u00f4ng t\u00e1c, s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 kh\u1ea5u theo l\u1edbp \u0111\u1ee9ng v\u1edbi g\u00f3c nghi\u00eang b\u1edd c\u00f4ng t\u00e1c l\u1edbn, s\u1eed d\u1ee5ng MXTLGN \u0111\u1ec3 x\u00fac ch\u1ecdn l\u1ecdc v\u00e0 khai th\u00e1c qu\u1eb7ng.<\/p>\n

– \u0110\u1ed1i v\u1edbi c\u00e1c m\u1ecf c\u00f3 d\u1ea1ng n\u1eb1m tr\u00ean b\u1ec1 m\u1eb7t (KM3), \u0111\u1ec1 xu\u1ea5t s\u1eed d\u1ee5ng HTKT ngang khai th\u00e1c nh\u1eb1m t\u1eadn d\u1ee5ng kh\u00f4ng gian \u0111\u1ec3 \u0111\u1ed5 th\u1ea3i trong.<\/p>\n

– C\u00e1c kh\u00e2u c\u00f4ng ngh\u1ec7 m\u1ecf \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t l\u1ef1a ch\u1ecdn c\u00e1c thi\u1ebft b\u1ecb ph\u1ee5 thu\u1ed9c v\u00e0o \u0111\u1eb7c \u0111i\u1ec3m \u0111i\u1ec1u ki\u1ec7n c\u1ee7a t\u1eebng m\u1ecf, c\u00e1c thi\u1ebft b\u1ecb \u0111\u01b0\u1ee3c l\u1ef1a ch\u1ecdn ph\u1ea3i hi\u1ec7n \u0111\u1ea1i, n\u0103ng su\u1ea5t cao, ho\u1ea1t \u0111\u1ed9ng ch\u1eafc ch\u1eafn, nh\u1ecbp nh\u00e0ng, ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3 v\u00e0 \u00edt \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn m\u00f4i tr\u01b0\u1eddng. Kh\u00e2u n\u1ed5 m\u00ecn l\u1ef1a ch\u1ecdn c\u00e1c lo\u1ea1i m\u00e1y khoan th\u1ee7y l\u1ef1c v\u00e0 khoan tay c\u00f3 \u0111\u01b0\u1eddng k\u00ednh d = 42-127mm; thi\u1ebft b\u1ecb x\u00fac b\u1ed1c – v\u1eadn t\u1ea3i \u0111\u1ea5t \u0111\u00e1 v\u00e0 qu\u1eb7ng l\u1ef1a ch\u1ecdn lo\u1ea1i m\u00e1y x\u00fac th\u1ee7y l\u1ef1c g\u1ea7u ng\u01b0\u1ee3c c\u00f3 dung t\u00edch E = 1,0-3,5m3 k\u1ebft h\u1ee3p v\u1edbi lo\u1ea1i \u00f4t\u00f4 c\u00f3 t\u1ea3i tr\u1ecdng q = 10-32 t\u1ea5n.<\/p>\n

– D\u1ef1a tr\u00ean k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u1ee7a \u0111\u1ec1 t\u00e0i \u0111\u00e3 ti\u1ebfn h\u00e0nh \u00e1p d\u1ee5ng th\u1eed nghi\u1ec7m c\u00f4ng ngh\u1ec7 x\u00fac b\u1ed1c ch\u1ecdn l\u1ecdc qu\u1eb7ng t\u1ea1i m\u1ecf s\u1eaft N\u00e0 L\u0169ng (Cao B\u1eb1ng). K\u1ebft qu\u1ea3 cho th\u1ea5y t\u1ef7 l\u1ec7 t\u1ed5n th\u1ea5t gi\u1ea3m 12,6% -15,8% t\u1ef7 l\u1ec7 l\u00e0m ngh\u00e8o gi\u1ea3m t\u1eeb 13%-16,4%, h\u00e0m l\u01b0\u1ee3ng qu\u1eb7ng nguy\u00ean khai trung b\u00ecnh t\u0103ng 3,40% – 7,74%.<\/p>\n

* \u0110\u1ed1i v\u1edbi kh\u00e2u tuy\u1ec3n kho\u00e1ng:<\/p>\n

T\u1eeb c\u00e1c nghi\u00ean c\u1ee9u, \u0111\u1ec1 xu\u1ea5t c\u00e1c gi\u1ea3i ph\u00e1p c\u00f4ng ngh\u1ec7, \u0111\u1ed3ng b\u1ed9 thi\u1ebft b\u1ecb c\u01a1 gi\u1edbi h\u00f3a tuy\u1ec3n qu\u1eb7ng s\u1eaft cho c\u00e1c m\u1ecf \u0111i\u1ec3n h\u00ecnh r\u00fat ra c\u00e1c gi\u1ea3i ph\u00e1p c\u00f4ng ngh\u1ec7 chung \u0111\u1ed1i v\u1edbi t\u1eebng \u0111\u1ed1i t\u01b0\u1ee3ng qu\u1eb7ng s\u1eaft c\u00e1c m\u1ecf nh\u1ecf ph\u00eda B\u1eafc Vi\u1ec7t Nam nh\u01b0:<\/p>\n

– L\u1ef1a ch\u1ecdn quy m\u00f4 x\u01b0\u1edfng tuy\u1ec3n: C\u00e1c m\u1ecf v\u00e0 \u0111i\u1ec3m m\u1ecf g\u1ea7n nhau c\u00f3 c\u00f9ng \u0111\u1eb7c \u0111i\u1ec3m qu\u1eb7ng n\u00ean x\u00e2y d\u1ef1ng c\u00e1c x\u01b0\u1edfng tuy\u1ec3n t\u1eadp trung \u0111\u1ec3 n\u00e2ng cao kh\u1ea3 n\u0103ng c\u01a1 gi\u1edbi h\u00f3a, m\u1ee9c \u0111\u1ed9 an to\u00e0n v\u00e0 thu\u1eadn ti\u1ec7n trong c\u00f4ng t\u00e1c qu\u1ea3n l\u00fd v\u1eadn h\u00e0nh. V\u1edbi c\u00e1c m\u1ecf n\u1eb1m ri\u00eang l\u1ebb, c\u1ea7n ch\u1ecdn ph\u01b0\u01a1ng \u00e1n x\u00e2y d\u1ef1ng x\u01b0\u1edfng c\u00f3 n\u0103ng su\u1ea5t ph\u00f9 h\u1ee3p gi\u1eefa m\u1ee9c \u0111\u1ea7u t\u01b0, tr\u1eef l\u01b0\u1ee3ng.<\/p>\n

– L\u1ef1a ch\u1ecdn c\u00f4ng ngh\u1ec7 tuy\u1ec3n v\u00e0 thi\u1ebft b\u1ecb \u0111\u1ed3ng b\u1ed9: Ph\u00f9 h\u1ee3p v\u1edbi t\u00ednh ch\u1ea5t qu\u1eb7ng, y\u00eau c\u1ea7u s\u1ea3n ph\u1ea9m, m\u1ee9c \u0111\u1ed9 \u0111\u1ea7u t\u01b0 v\u00e0 c\u00e1c \u0111i\u1ec1u ki\u1ec7n t\u1ef1 nhi\u00ean x\u00e3 h\u1ed9i khu v\u1ef1c \u0111\u1ed3ng th\u1eddi tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n, qui \u0111\u1ecbnh hi\u1ec7n h\u00e0nh.<\/p>\n

– B\u1ed1 tr\u00ed c\u00e1c thi\u1ebft b\u1ecb trong x\u01b0\u1edfng tuy\u1ec3n: \u0110\u1ea3m b\u1ea3o gi\u1ea3m thi\u1ec3u c\u00e1c d\u00f2ng ch\u1ea3y c\u01b0\u1ee1ng b\u1ee9c, thu\u1eadn ti\u1ec7n trong c\u00f4ng t\u00e1c v\u1eadn h\u00e0nh, b\u1ea3o d\u01b0\u1ee1ng v\u00e0 s\u1eeda ch\u1eefa thi\u1ebft b\u1ecb.<\/p>\n

\u0110\u1ed1i v\u1edbi qu\u1eb7ng t\u1eeb t\u00ednh m\u1ea1nh v\u00e0 h\u1ed7n h\u1ee3p magnetite – hematite: D\u00e2y chuy\u1ec1n tuy\u1ec3n qu\u1eb7ng s\u1eaft deluvi – eluvi g\u1ed3m c\u00e1c kh\u00e2u tuy\u1ec3n r\u1eeda- \u0111\u00e1nh t\u01a1i, tuy\u1ec3n t\u1eeb, tuy\u1ec3n tr\u1ecdng l\u1ef1c thu h\u1ed3i tinh qu\u1eb7ng. D\u00e2y chuy\u1ec1n tuy\u1ec3n qu\u1eb7ng g\u1ed1c g\u1ed3m c\u00e1c kh\u00e2u \u0111\u1eadp – s\u00e0ng, nghi\u1ebfn – tuy\u1ec3n t\u1eeb – tuy\u1ec3n tr\u1ecdng l\u1ef1c thu h\u1ed3i tinh qu\u1eb7ng. \u0110\u1ed1i v\u1edbi qu\u1eb7ng t\u1eeb t\u00ednh y\u1ebfu hay kh\u00f4ng t\u1eeb, c\u00f4ng ngh\u1ec7 tuy\u1ec3n \u00e1p d\u1ee5ng l\u00e0 tuy\u1ec3n r\u1eeda thu h\u1ed3i \u0111\u01b0\u1ee3c tinh qu\u1eb7ng c\u00f3 h\u00e0m l\u01b0\u1ee3ng s\u1eaft tr\u00ean 50% \u0111em ti\u00eau th\u1ee5 tr\u1ef1c ti\u1ebfp ho\u1eb7c ph\u1ed1i tr\u1ed9n v\u1edbi tinh qu\u1eb7ng s\u1eaft c\u00f3 t\u1eeb t\u00ednh h\u00e0m l\u01b0\u1ee3ng cao….<\/p>\n

V\u1ec1 gi\u1ea3i ph\u00e1p l\u01b0a ch\u1ecdn thi\u1ebft b\u1ecb c\u1ee7a kh\u00e2u c\u1ea5p li\u1ec7u v\u00e0 chu\u1ea9n b\u1ecb kho\u00e1ng s\u1ea3n: C\u00e1c d\u00e2y chuy\u1ec1n tuy\u1ec3n qu\u1eb7ng deluvi – eluvi, qu\u1eb7ng s\u1eaft t\u1eeb t\u00ednh y\u1ebfu v\u00e0 kh\u00f4ng t\u1eeb \u0111\u1ec1 xu\u1ea5t l\u1ef1a ch\u1ecdn m\u00e1ng c\u00e0o c\u1ea5p li\u1ec7u k\u1ebft h\u1ee3p n\u01b0\u1edbc \u00e1p l\u1ef1c v\u1eeba \u0111\u00e1nh t\u01a1i qu\u1eb7ng v\u1eeba \u0111\u1ea9y qu\u1eb7ng, qu\u1eb7ng qu\u00e1 c\u1ee1, gi\u1ea3m c\u1ee1 h\u1ea1t b\u1eb1ng thi\u1ebft b\u1ecb \u0111\u1eadp h\u00e0m. C\u00e1c d\u00e2y chuy\u1ec1n tuy\u1ec3n qu\u1eb7ng s\u1eaft t\u1eeb t\u00ednh m\u1ea1nh v\u00e0 h\u1ed7n h\u1ee3p magnetite – hematite \u0111\u1ec1 xu\u1ea5t s\u1eed d\u1ee5ng c\u00e1c thi\u1ebft b\u1ecb \u0111\u1eadp h\u00e0m trong c\u00f4ng \u0111o\u1ea1n \u0111\u1eadp th\u00f4 t\u1eadp trung. C\u00f4ng \u0111o\u1ea1n \u0111\u1eadp nh\u1ecf s\u1eed d\u1ee5ng \u0111\u1eadp h\u00e0m ho\u1eb7c \u0111\u1eadp c\u00f4n k\u1ebft h\u1ee3p s\u00e0ng rung ph\u00e2n lo\u1ea1i ki\u1ec3m tra t\u1ea1o th\u00e0nh v\u00f2ng k\u00edn.<\/p>\n

L\u1ef1a ch\u1ecdn thi\u1ebft b\u1ecb c\u1ee7a kh\u00e2u \u0111\u00e1nh t\u01a1i, nghi\u1ec1n – tuy\u1ec3n: C\u00e1c d\u00e2y chuy\u1ec1n tuy\u1ec3n qu\u1eb7ng deluvi – eluvi, qu\u1eb7ng s\u1eaft c\u00f3 t\u00ednh y\u1ebfu v\u00e0 kh\u00f4ng t\u1eeb \u0111\u1ec1 xu\u1ea5t s\u1eed d\u1ee5ng m\u00e1y r\u1eeda c\u00e1nh vu\u00f4ng 1-2 c\u1ea5p. V\u1edbi qu\u1eb7ng kh\u00f3 r\u1eeda c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng s\u00e0ng quay r\u1eeda k\u1ebft h\u1ee3p m\u00e1y r\u1eeda c\u00e1nh vu\u00f4ng. C\u00e1c d\u00e2y chuy\u1ec1n tuy\u1ec3n qu\u1eb7ng s\u1eaft g\u1ed1c t\u1eeb t\u00ednh m\u1ea1nh v\u00e0 h\u1ed7n h\u1ee3p magnetite – hematite, \u0111\u1ec1 t\u00e0i \u0111\u1ec1 xu\u1ea5t s\u1eed dung nghi\u1ec1n bi k\u1ebft h\u1ee3p ph\u00e2n c\u1ea5p ru\u1ed9t xo\u1eafn ho\u1eb7c s\u00e0ng rung cao t\u1ea7n trong c\u00f4ng \u0111o\u1ea1n nghi\u1ec1n – ph\u00e2n c\u1ea5p. C\u00f4ng \u0111o\u1ea1n tuy\u1ec3n t\u1eeb s\u1eed d\u1ee5ng m\u00e1y tuy\u1ec3n t\u1eeb c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng th\u1ea5p v\u00e0 m\u00e1y tuy\u1ec3n t\u1eeb c\u01b0\u1eddng \u0111\u1ed9 t\u1eeb tr\u01b0\u1eddng cao. C\u00f4ng \u0111o\u1ea1n tuy\u1ec3n tr\u1ecdng l\u1ef1c s\u1eed dung v\u00edt xo\u1eafn ho\u1eb7c b\u00e0n \u0111\u00e3i. C\u00e1c kh\u00e2u v\u1eadn chuy\u1ec3n qu\u1eb7ng trong d\u00e2y chuy\u1ec1n, kh\u00e2u kh\u1eed n\u01b0\u1edbc tinh qu\u1eb7ng, kh\u00e2u x\u1eed l\u00fd b\u00f9n th\u1ea3i \u0111\u1ec1u \u0111\u01b0\u1ee3c nghi\u00ean c\u1ee9u l\u1ef1a ch\u1ecdn gi\u1ea3i ph\u00e1p ph\u00f9 h\u1ee3p.
\nC\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt, c\u01a1 gi\u1edbi ho\u00e1 tuy\u1ec3n \u0111\u00e3 \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng th\u1eed nghi\u1ec7m t\u1ea1i d\u00e2y chuy\u1ec1n tuy\u1ec3n qu\u1eb7ng s\u1eaft m\u1ecf K\u00edp T\u01b0\u1edbc. K\u1ebft qu\u1ea3 \u00e1p d\u1ee5ng c\u00e1c gi\u1ea3i ph\u00e1p cho th\u1ea5y, t\u1ef7 l\u1ec7 th\u1ef1c thu tinh qu\u1eb7ng t\u1eeb 86% – 88%, n\u0103ng su\u1ea5t tinh qu\u1eb7ng v\u00e0 qu\u1eb7ng nguy\u00ean khai t\u0103ng 5-7 l\u1ea5n\/ng\u01b0\u1eddi, c\u00e1c ch\u1ec9 s\u1ed1 ti\u00eau hao nguy\u00ean, nhi\u00ean v\u1eadt li\u1ec7u \u0111\u1ec1u gi\u1ea3m.<\/p>\n

K\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u1ee7a \u0111\u1ec1 t\u00e0i, ngo\u00e0i \u00fd ngh\u0129a v\u1ec1 khoa h\u1ecdc, c\u00f2n c\u00f3 \u00fd ngh\u0129a quan tr\u1ecdng v\u1ec1 kinh t\u1ebf, x\u00e3 h\u1ed9i. \u0110\u00f3 l\u00e0 vi\u1ec7c t\u0103ng s\u1ea3n l\u01b0\u1ee3ng, n\u0103ng su\u1ea5t lao \u0111\u1ed9ng, gi\u1ea3m t\u1ed5n th\u1ea5t t\u00e0i nguy\u00ean, \u0111\u1ea3m b\u1ea3o an to\u00e0n lao \u0111\u1ed9ng v\u00e0 gi\u1ea3m thi\u1ec3u \u00f4 nhi\u1ec5m m\u00f4i tr\u01b0\u1eddng.<\/p>\n

\u0110\u1ec1 t\u00e0i \u0111\u00e3 \u0111\u01b0\u1ee3c H\u1ed9i \u0111\u1ed3ng KHCN \u0111\u00e1nh gi\u00e1 cao v\u00e0 cho \u0111i\u1ec3m \u0111\u1ea1t lo\u1ea1i kh\u00e1.\/<\/p>\n","protected":false},"excerpt":{"rendered":"

Ng\u00e0y 8\/5\/2014, t\u1ea1i V\u0103n ph\u00f2ng B\u1ed9 C\u00f4ng Th\u01b0\u01a1ng, H\u1ed9i \u0111\u1ed3ng Khoa h\u1ecdc c\u1ea5p Nh\u00e0 n\u01b0\u1edbc \u0111\u00e3 t\u1ed5 ch\u1ee9c H\u1ed9i ngh\u1ecb nghi\u1ec7m thu \u0111\u1ec1 t\u00e0i: &quot;Nghi\u00ean c\u1ee9u \u0111\u1ec1 xu\u1ea5t c\u00e1c gi\u1ea3i ph\u00e1p c\u00f4ng ngh\u1ec7 c\u01a1 gi\u1edbi ho\u00e1 khai th\u00e1c v\u00e0 tuy\u1ec3n h\u1ee3p l\u00fd cho c\u00e1c m\u1ecf qu\u1eb7ng s\u1eaft quy m\u00f4 nh\u1ecf ph\u00eda B\u1eafc Vi\u1ec7t Nam&quot; do […]<\/p>\n","protected":false},"author":3,"featured_media":111254,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[37],"tags":[],"yoast_head":"\nH\u1ed9i \u0111\u1ed3ng nghi\u1ec7m thu \u0111\u1ec1 t\u00e0i tr\u1ecdng \u0111i\u1ec3m c\u1ea5p Nh\u00e0 n\u01b0\u1edbc - Vi\u1ec7n Khoa h\u1ecdc C\u00f4ng ngh\u1ec7 M\u1ecf - Vinacomin<\/title>\n<meta name=\"robots\" content=\"index, follow, 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