Method for segmented acid-adding and circulating leaching of coarse particles in laterite nickel ores

A technology of laterite nickel ore and acid circulation is applied in the field of metal metallurgy, which can solve the problems of high cost and low leaching rate of nickel and cobalt, and achieve the effects of improving strength, being beneficial to leaching and improving penetration rate.
CN101768666AInactive Publication Date: 2010-07-07厦门紫金矿冶技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
厦门紫金矿冶技术有限公司
Publication Date
2010-07-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the field of metal metallurgy, in particular to a method for segmented acid-adding and circulating leaching of coarse particles in low-grade nickel oxide ores. The method comprises the steps of firstly washing raw ores, screening, breaking the part on a screen to a certain particle size, adopting the method of segmented acid-adding, circulating spray-leaching and washing an ore heap after spraying for extracting nickel and cobalt from low-grade laterite nickel ores, returning washing liquid to the preparation stage of acid liquid and continuing the spraying of a new heap. The method has the advantages of short process flow, simple equipment, low investment, low cost, environment-friendly property and high leaching rate of the nickel and the cobalt, and can treat the low-grade oxidized laterite nickel-cobalt mineral resources which can not be treated by the traditional dressing-metallurgy process, expand the utilization range of the resources and improve the comprehensive recycling level of nickel and cobalt metals.
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Description

technical field

[0001] The invention relates to the field of metallurgy, in particular to a method for cyclically leaching coarse grains in low-grade nickel oxide ores by adding acid in stages. Background technique

[0002] With the gradual depletion of nickel sulfide mines, the global nickel industry has focused on resource development on laterite nickel resources, which account for 72% of global reserves.

[0003] At present, there are roughly three treatment processes for nickel laterite ore in the world, namely, bioleaching process, fire process, and wet process. The wet process can be divided into ammonia leaching process, acid leaching process and heap leaching process.

[0004] Heap leaching is a relatively economical method for extracting valuable metals from low-grade ores. At present, it has been successfully applied in the recovery process of gold, silver, copper and other metals. Heap leaching is usually to pile the raw materials directly from the ore deposit ...

Claims

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