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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.

Inactive Publication Date: 2010-07-07
厦门紫金矿冶技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The main purpose of the present invention is to overcome the disadvantages of low nickel-cobalt leaching rate and high cost when processing low-grade laterite nickel ore in the prior art, and provide a method for leaching coarse grains in laterite nickel ore by adding acid in stages

Method used

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

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Effect test

Embodiment 1

[0046] A. Prepare the collected ore sample and the dense overflow water of fine mud according to the liquid-solid ratio of 1.5:1, wash the ore in the ore washing equipment for 60 minutes, and then pass through a 0.22mm sieve;

[0047] B. Use a jaw crusher to crush the ore samples with a particle size greater than 0.22mm on the sieve until the particle size is less than 20mm;

[0048] C. After crushing, the ore is mixed evenly and put into the pile. Get part and carry out particle size sieve analysis, the result is as shown in table 1;

[0049] D. The first batch of ore piles use tap water and sulfuric acid to prepare the spray liquid. The concentration of sulfuric acid in the first spray is 7%, the liquid-solid ratio is 1.5:1, and the spray intensity is 15L / m 2 h, after the first spraying, the expensive spraying liquid returns to the circular spraying and leaching after adding sulfuric acid, a total of four cycles, and the sulfuric acid is added to the circulating spraying li...

Embodiment 2

[0062] A. Prepare the collected ore sample and the dense overflow water of fine mud according to the liquid-solid ratio of 1.5:1, wash the ore in the ore washing equipment for 60 minutes, and then pass through a 0.22mm sieve;

[0063] B. Use a jaw crusher to crush the ore samples with a particle size greater than 0.22mm on the sieve until the particle size is less than 5mm;

[0064] C. After crushing, the ore is mixed evenly and put into the pile;

[0065] D. Use ore heap washing water and sulfuric acid to prepare spray liquid. The concentration of sulfuric acid in the first spray is 7%, the liquid-solid ratio is 1.5:1, and the spray intensity is 15L / m 2 h, after the first spraying, the expensive spraying liquid returns to the circular spraying and leaching after adding sulfuric acid, a total of four cycles, and the sulfuric acid is added to the circulating spraying liquid in four equal parts according to the amount of 600kg / t ore, and the cycle After spraying, the precious l...

Embodiment 3

[0071] A. Prepare the collected ore sample and the dense overflow water of fine mud according to the liquid-solid ratio of 1.5:1, wash the ore in the ore washing equipment for 60 minutes, and then pass through a 0.22mm sieve;

[0072] B. Use a jaw crusher to crush the ore samples with a particle size greater than 0.22mm on the sieve until the particle size is less than 40mm;

[0073] C. After crushing, the ore is mixed evenly and put into the pile;

[0074] D. Use ore heap washing water and sulfuric acid to prepare spray liquid. The concentration of sulfuric acid in the first spray is 14%, the liquid-solid ratio is 1.5:1, and the spray intensity is 4L / m 2 h, after the first spraying, the expensive spraying liquid returns to the circulating spraying and leaching after adding sulfuric acid, and the total cycle is twice, and the sulfuric acid is added to the circulating spraying liquid in two equal parts according to the amount of 600kg / t ore, and the circulating After spraying,...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/06C22B23/00
CPCY02P10/20
Inventor 陈景河刘升明王中溪季常青叶志勇谢洪珍
Owner 厦门紫金矿冶技术有限公司
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