Thong tin khoa hpc cong nghe m d NGHIEN CUU DE XUAT CONG NGHE TUYEN QUANG BO XIT Tan Rai - Lam Dong Bauxite is the key material for manufacturing aluminum, ThS HOANG MINH HUNG which has been widely used with the greatest volume on Vien Khoa hpc Cdng nghe Md - TKV the worid nowadays Concerning to the bauxite mining and processing technology for minimizing environmental pollution, this paper refers to the study on the selection of the bauxite ore separation technologies at Tan Rai area (Lam Dong province) Dat van de Bdxit la nguyen lieu chCi yeu de san xua't nhdm kim loai Nhdm la mdt cac kim loai mau cd ban difpc loai ngudi hien sir dung vdi khdi lupng Idn nha't Da cd nhieu qudc gia td chifc khai thac che bien quang bdxit nhdm nhU An Dp, Inddnexia, Trung Qud'c, Australia, Nga, Brazin, Hungari, Jamaica, Malaixia Tuy nhien, nhu cau dien nang cho dien phan nhdm rat Idn, cdng nghe luyen alumin ddi hoi trinh dp cao, dam bao an toan mdi trifdng nen chi cd mdt sd nifdc da dau tu phat then nganh cdng nghiep luyen alumin va dien phan nhdm nhu Trung Qud'c, An Dp, Australia, Nga, Hungari Lien quan den van de lifa chpn cdng nghe khai thac, che bien quang bdxit b Tay Nguyen nham giam thieu d nhilm mdi trudng, bai viet de cap den viec phan tfch, lifa chpn cdng nghe cho nha may tuyen quang bdxit Lam Ddng Gidi thieu cdng nghe tuyen quang bdxit Lam Ddng theo thiet kecosd Vila qua Vien KHCN Mo va Luyen kim va mdt sd td chifc khac da tien hanh nghien curu tfnh kha tuyen rCfa quang bdxft Tan Rai - Lam Ddng TCf ket qua nghien curu da de xua't cdng nghe lam cd sd cho viec lap du an dau tu va thidt ke cd sd nha may tuyen, ket qua dupe the hien nhU sau: - Mau quang nguyen khai cd cap hat Idn nha't ~300mm, - Dp am binh quan: 23,32%, - Ham lUdng AI2O3 khoang 39,15%, - Ham lUdng SiOz khoang 6,25%, - Ham lUdng FejOa khoang 27,25% i ^ — ' ^ l - Ham lUdng TiOa khoang 4,32%, - Hao hut nung (MKN) khoang 22,57% - Ket qua nghien cifu phan khoang vat chii yeu la gipxit- 50%; gdtit -15% limonit -25%; kaolinit - % bdmit - % ; thach anh - % rutin+ilmenit+leicoxen ~ 3% hematit ~ % va sd khoang vat khac nhu fenspat, clorit, olivin, ~3% - Cap hat -0,063mm chiem khoang 32,75%; Chi sd deo la 15,72% thudc loai khd rCia - Thf nghiem dung sang quay danh tdi ket hdp vdi phan cap cao xoan, tuyen rCfa giai doan de rCfa quang 0-40mm va tach cap hat 0-0,5mm Ket qua la da cho san pham tinh quang bdxft, dam bao ham