Wet treatment method of iron containing nickel sulfide material

Abstract

The invention relates to a wet treatment method extracting nickel from iron containing nickel sulfide material. Its features are after slurring and oxidizing pretreatment to the iron containing nickel sulfide material; adopting pressurizing, adding oxygen, and additive method to effectively lixiviate nickel cobalt and restrain iron, reduce purifying deferrization reagent consumption and iron slag, reduce nickel losing, use sodium hydroxide to sink nickel after leaching solution, use sulphuric acid to dissolve nickel hydroxides, and gaining bright nickel sulphate solution after extracting and reclaiming cobalt. The nickel sulfate solution is produced out nickel sulfate by condensing crystallizing, or electricity nickel products by electro deposit, and both of them are according with GB.

Description

technical field [0001] The invention belongs to a treatment method for nickel sulfide material, in particular to a method for wet extraction of nickel from iron-containing chemical precipitation nickel sulfide material. Background technique [0002] Nickel sulfide ore is the main mineral of nickel smelting raw material. The traditional process is to use fire method to obtain high nickel matte, then normal pressure-hot pressure leaching, purification, electrolysis to produce nickel metal and nickel sulfate and other nickel salts, or through grinding and floating, nickel sulfide anode Electrolytic production of metallic nickel, such as Jinchuan Company, Xinjiang Fukang Smelter and other major domestic manufacturers of metallic nickel and nickel salts, all adopt this process. Its advantages are large production capacity and large scale, but the process is long, the equipment is complicated, the investment is large, and the SO produced during smelting 2 Serious environmental po...

AI Technical Summary

Problems solved by technology

Combined leaching with sulfuric acid at normal pressure and pressurization is easy to generate hydrogen sulfide gas, pollute the environment, a large amount of iron enters the solution (more than 90%), the cost of purification and impurity removal is high, and the loss of nickel is large; chlorination leaching has higher requirements for equipment , it is difficult to implement industrialization; pressurized ammonia leaching also requires a large investment in equipment, and an ammonia recovery system is required

[0003] From the perspective of the above processes, all of them have large investment, high production cost, and limited application of the process. They are only used in ores with high nickel grade and relatively simple composition.

For nickel ore with low nickel-cobalt grade and high iron content, it is impossible to economically and effectively recover the nickel metal in the ore, whether it is produced by pyrometallurgy, reduction ammonia leaching process, or pressurized acid leaching process.

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