Technology for the processing of low-quality iron bauxites from Kazakhstan deposits
On the Republic of Kazakhstan territory at the Kostanay region there are explored reserves of bauxite that allow organizing the construction of alumina refinery.Bauxites available are characterized by high content of iron oxide which did not allow involving them into the industrial processing by known technologies of alumina production before.Theoretical and laboratory investigations gave ground for the development of new technology for the production of alumina from low-quality iron bauxites by Bayer-hydro-chemistry, hydro-garnet version method.The new technology consists in three-stage processing of initial raw material of any quality.At the first stage the Bayer leaching is conducted;at the second stage the hydro-chemical leaching of red mud takes place in liquor with high caustic ratio.At the third stage the mixed aluminate liquor is processed by standard method, producing alumina and recycled liquid phase.Solid waste of bauxite processing that practically does not have any alkalis becomes commercial product.In comparison with known alumina production technologies this process increases the commercial alumina yield, reduces the caustic, energy resources and fuel consumption, decreases capital costs and carbon dioxide emissions to atmosphere.The technology applied allows involving any types of low-quality bauxites into the industrial processing, eliminating red mud dumps and achieving the complete utilization of ash.
bauxite alumina pilot plant hydrogarnet technology technical and economic calculation
R.A.Abdulvaliyev E.A.Tastanov V.V.Medvedev S.N.Akhmedov
Centre of Earth Sciences, Metallurgy and Ore Beneficiation, Shevchenko St.29/133, 050010, Almaty,Kaz ALCORUS Co.Ltd., Makarova St.18 A, 3-H, 199053, Petersburg, Russian Federation
国际会议
32th International Conference & Exhibition ICSOBA-2014(第32届国际铝土矿、氧化铝和铝工业技术学术年会)
郑州
英文
181-190
2014-10-12（万方平台首次上网日期，不代表论文的发表时间）