Process for comprehensively developing and utilizing nickel, cobalt, iron and magnesium from laterite-nickel ore

A technology of lateritic nickel ore and nickel-cobalt, which is applied in the direction of improving process efficiency, etc., can solve the problems of insufficient comprehensive utilization of resources and poor versatility, and achieve the effects of low cost, wide application range and complete scheme
CN101338376AInactive Publication Date: 2009-01-07CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2009-01-07
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a method for compressively developing and utilizing nickel and cobalt in a lateritic nickel ore. The lateritic nickel ore is used as the raw material; the technical flows of mining, defibrination and ore preparation, pressurizing and wet chlorinating extraction, separating the nickel (cobalt) and iron by extraction, hydrolyzing magnesium chloride with a high temperature, magnetizing and roasting the extracted slag, magnetically separating, etc., and the like, are adopted to extract the middle product of the nickel and cobalt, recycle the light magnesium chloride and the materials used for pudding. The invention is mainly characterized in that the nickel and cobalt in the lateritic nickel ore is firstly and selectively dissolved and extracted by using the pressurized muriatic acid; a depositing method is used on the nickel and cobalt in a liquid to obtain the middle product; the mother liquid after the nickel is deposited is hydrolyzed by high temperature to obtain the light magnesium chloride and the chlorine hydride is recycled to obtain the muriatic acid; a material used for pudding is obtained after the extracted slag is reduced, magnetized, roasted and weakly separated in a magnetic way; the recycling muriatic acid enters the working period of extraction, thereby leading the muriatic acid to closely circulate. The method of the invention comprehensively recycles nickel and cobalt, magnesium and iron and has the advantages of high nickel and cobalt extraction rate, low cost, less investment and closed muriatic acid circulation. The whole technique is simple, clean, environmental friendly and is applicable for industrial production with large scale in particular.
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Description

technical field

[0001] The invention belongs to the field of non-ferrous metal hydrometallurgy, a process method for extracting nickel and cobalt from laterite nickel ore by wet chlorination and comprehensively utilizing magnesium and iron, especially a process for processing low-grade laterite nickel ore and comprehensively utilizing valuable metal method. Background technique

[0002] The types of nickel resources are usually divided into two types: nickel sulfide ore and nickel oxide ore. From a global perspective, currently about 70% of nickel is extracted from nickel sulfide ore, but nickel in oxide ore accounts for 65-70% of the total reserves. With the gradual reduction of nickel sulfide resources and high-grade laterite nickel ore resources, the economic development of a large number of laterite nickel ore with a grade of about 1% has been paid more and more attention by people.

[0003] According to the content of iron and magnesium in the ore, nickel-bearing late...

Claims

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