KHOA HOC VA CONG NGHE MO NGHIEN curu THANH PHAN VAT CHAT VA DjNH HirCTNG CONG NGHE TUYEN QUANG NIKEN-DONG XAM TAN M O QURNG TRUNG VR HR TRl, CRO B^NG ThS TRAN THI HIEN, ThS DAO CONG VU ThS PHAM Bdc PHONG - Vien KH&CN Mo-Luyen TU lu-png khoang san niken cua nu-ac ta kha nho va tap trung chu y l u 6- tinh San La (mo niken Ban Phue, niken-ding Ta Khoa), Cao Bang (mo niken-dIng Suli Cun, niken-dIng xa Quang Trung va Ha Tri); theo tong hpp tai nguyen niken nu-ac ta khoang 507 ngan tan Ni N l n cong nghiep nu-ac ta dang tren da phat triln manh, niken cang du-pc SLP dung rpng rai nhieu ITnh VLPC cua nen kinh t l q u i c dan Toan bp cac san pham c6 the c h i biin tCp niken deu phai du-a vao nguon nhap khiu Hien nay, nu-ac quang niken-dIng dang xam tan chu-a du-pc quan tam cung nhu- nghien cu-u eong nghe tuyen c h i biin Do vay, viee nghien cu-u phin vat chat sau d6 nghien cu-u djnh hu-ang eong nghe tuyen, c h i bien nang cao chit lu-ang quang niken-dlng (NiCu) xam tan mo Quang Trung va Ha Tri khong chi CO y nghTa khoa hpc ma co y nghTa thu-c t l lan, g6p phin vao su- nghiep eong nghiep hoa d i t nu-ac T phan tich ray c l p hat, nham xac djnh phan hda hpc, su- phan b l Ni-Cu-Co-MgO cac cap hat, phin vat chat eua m i u nghien cu-u K i t qua phan tfch hoa da nguyen t l tai Trung tam Phan tfch Vien KH&CN Mo - Luyen kim t h i hien a Bang 2, k i t qua phan tich hoa k i l m tra va phan tich ICP thyc hien tai Trung tam thf nghiem dja chit T i n g Cue Dja chit va Khoang san t h i hien 6- Bang 3 K i t qua phan tich phan vat chat mau nghien cu'u 3.1 Kit qua phan tieh phan khoang vat mau quang nguyen khai a) Kit qua phan tich ranghen: k i t qua phan tich ranghen tren may D8-Advanee du-ac neu Bang 1, gian d l ranghen the hien 6- H.I Bang Kit qua phan tich ranghen mau quang nguyen khai M i u nghien cu'u Mau nghien CLPU phin vat ehit va dinh hu-ang eong nghe tuyin du-pc Lien doan Dja chit Dong Bac khoan va l i y m i u dai dien cho toan mo M i u la loai quang dang da CLPng, mau ghi, xam, ran chic, khong bun set Phu'O'ng phap nghien cu'u D I xac djnh phan vat chat m i u da siidung cac phu-ang phap phan tich khae nhu-; Phan tich hoa da nguyen to, phan tich khoang tu-ang, thach hpc du-ai kinh hiln vi soi n i i MBC-9 va kinh hien vi phan cu-c Leica DM750P, phan tich ranghen, phan tich nhiet vi sai, tai Khoa dja chit, Tru-o-ng Dai hpc Khoa hpc Tu- nhien; Trung tam Thi nghiem Dja chit, Tong Cyc Dia chit va Khoang san; Vien Khoa hpc Dja chit, Bp Tai nguyen va Moi tru-6-ng Ngoai SLP dung cac phu-ang phap kim P * " " ^ Ten khoang vat Mica - KAl2[A1Si30io](OH)2 Talc-Mg3[Si40io](OH)2 Amphibol Antigorit - 3MgO.2SiO2.2H2O Clorit - Mg2Al3[AISi30io](OH)8 Thach anh - Si02 Albit-NaAISi308 Diopsid - CaMgSi206 Maghemit + Magnetit Canxit - CaC03 Pyrotin - Fei.xS Chalcopyrit - CuFeS2 Pentlandit - (Fe,Ni)9S8 Khoang ham j lu-ang (%) j 14+16 4+6 15+17 ie+18 19+21 1+3 11+13 3+5 1+3 4+6 1+3 It -: It CONG NGHliP MO $61-2017 KHOA HOC VA CONG NGHE MO 12 NHmKVSS H Gian phan tich khoang vat miu quang Nl-Cu Nhan xet: K i t qua nghien cu-u va phan tich ranghen cho thay phin khoang vat kha phu-e tap bao g i m khoang Pentlandit ehu-a niken, Chalcopyrit, Pyrotin chu-a ding, sat, vai ham lu-png khoang thap, khoang ehu-a MgO xuit hien kha nhilu t i n tai cac khoang Diopsid, Clorit, Antigorit, Tale b Ket qua phan tieh khoang twang, thaeh hge b Md ta cac khoang vat miu khoang tudng Thanh phin khoang vat quang mau la cac khoang vat sulphur Trong p h i blln han la pyrotin Chung co dang hat tha hinh, tao cac dam nho phan bo rai rac n l n m i u Kieh thu-ac hat tCp 0,1+1,5 mm Pyrotin thu-6-ng mpc xen vai chalcopyrit va pentlandit Pentlandit va chalcopyrit c6 it han Chung e6 dang t i m , hat, thu-ang mpc ghep cung vai pyrotin cung mpt t l hpp khoang vat Pentlandit co dang tu- hinh han chalcopyrit Kich thu-ac hat tCp 0,01+1 mm Ngoai co nhu-ng eho chalcopyrit va pentlandit tao nhij-ng hat rieng re, hoac dang xen vao cae hat phi quang dang vay spi Pyrit: Dang hat tu- hinh, manh nho, kich thu-ac 0,1+1,5 mm Sphalerit: Co rat ft, gap vai hat nho nam chalcopyrit Kich thu-ae