The usage of immobilized Acidithiobacillus ferrooxidans cells for stirred tank leaching of non-ferrous metals
In this work the results of stirred-tank leaching of sulfide flotation concentrates using ferric ions solution with the separate biological regeneration ( biooxidation stage) by means of immobilized Acidithiobacillus ferrooxidans are given. The experimental work on a sample of pyrrhotite concentrate which contains; 1.2％ nickel, 0. 25％ copper and 75％ iron is described. It is shown that the ability of bacteria to adsorb on the surface of solid materials can increase the rate of oxidant regeneration. The process of cell immobilization on various carriers of organic and inorganic composition is conducted in this investigation, and the effect of physicochemical factors and surface properties of solid materials on activity and number of immobilized cells is discussed in detail. The fastest oxidation kinetics was achieved by using activated carbon -7. 4 g of Fe( II)/( L ? h) , at a flow rate of an average of 1 L/h. The leaching of pyrrhotite concentrate ( at 80℃, pH = 1.7) usage solution containing up to 10 Fe ( II) g/L with separate regeneration in a closed cycle allows the achievement of an 84％ nickel and 86％ copper yield in 12 hours.
immobilization biooxidation of ferrous iron leaching non-ferrous metals activated carbon
Maxim S. Gusakov Lyubov N. Krulova Eduard V. Adamov
National University of Science and Technology (MISIS), 119049, Moscow, Russia
国际会议
The 19th International Biohydrometallurgy Symposium(第19届国际生物湿法冶金大会 IBS2011)
长沙
英文
609-610
2011-09-18（万方平台首次上网日期，不代表论文的发表时间）