Method for leaching bidery metal by sulfuric acid and inflation agitation leaching trough

Abstract

The invention relates to a method of lixiviating a white metal with vitriol and a charged churn of lixiviation tank. The method is as follows; the white metal is ground subtly as a lixiviation raw material; in lixiviation phase 1, add certain amount of white metal into a reactor, confect lixiviation solution with a liquid / solid ratio of 5:1 using H2SO4; churn lixiviate under the temperature of 85 - 100 DEG C; in lixiviation phase 2, lead the air to oxidize a lixiviated copper, under the temperature of 80- 85 DEG C, charge a turbine and churn lixiviate; slag and filtrate are generated after a filtration and rinse of pulp, magnetic material is selected and return to lixiviation phase 1; slag and filtrate are generated after the filtration and rinse of pulp, and the pulp is recycled; the lixiviation solution is used as the stock solution for the recycle of Cu and CO. Charge-churn the lixiviation tank comprises a stirrer, a beaker, the lixiviation tank is placed upon an electric cooker, a churn shaft and a blade are made of titanium, two pieces of PTFE baffles are arranged inside the beaker, a charging tube is a glass tube with a nozzle, the nozzle is positioned between the blade and the shaft, a lid is supplied on the beaker.

Description

technical field [0001] The invention relates to the field of nonferrous metal hydrometallurgy, and more specifically relates to a method for leaching white metal with sulfuric acid and an aeration stirring leaching tank used in the method. Background technique [0002] White metal is one of the important cobalt raw materials imported from Africa. It is a copper, iron and cobalt alloy obtained by reducing and smelting the converter slag obtained during the converter blowing process in the copper smelting process. As we all know, Zambia's Copperbelt ore belt (and the adjacent Zaire DRC ore belt) is a world-renowned copper mine, and it is also one of the world's major cobalt ore belts. Converter slag containing a large amount of cobalt has been piled up in the local area. for nearly sixty years. [0003] In recent years, the local government and other countries, including China, have successively built factories in the above-mentioned areas to produce white metal. At present...

AI Technical Summary

Problems solved by technology

The disadvantage is that the regeneration of divalent iron ions or monovalent copper ions requires chlorine gas, and it takes a long time to regenerate with air or oxygen

[0031] 4) leaching white metal with sulfuric acid and sodium chlorate is a fast and easy method for leaching, but its biggest disadvantage is that the price of sodium chlorate is relatively high, and the cost of sodium chlorate required per ton of metal cobalt reaches 10,000 Yuan;

[0032]5) Oxidative leaching with sulfuric acid-hydrochloric acid mixed acid, there are problems such as long leaching time, large amount of oxygen consumption, CL- in the leachate, etc.

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