Method for laterite-nickel ore resourceful treatment and comprehensive recycling

A technology of laterite nickel ore and resource utilization, which is applied in the field of hydrometallurgy and smelting, can solve the problems of loss of nickel and cobalt along the process, high cost, and many returned materials, and achieves the effect of high nickel recovery rate and low cost.

Active Publication Date: 2016-02-03
广西银亿再生资源有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a cumbersome process leads to the loss of nickel and cobalt along the process, the water expansion of the system caused by washing water, the large consump

Method used

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  • Method for laterite-nickel ore resourceful treatment and comprehensive recycling

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Effect test

Embodiment 1

[0037] A method for resource processing and comprehensive recycling of laterite nickel ore, comprising the following specific steps:

[0038] a) Pretreatment: Pretreatment includes adding water to the laterite nickel ore for slurrying and sieving, wherein the weight ratio of laterite nickel ore: water is 1:4-6, and then stirring for 0.5 hours to gradually pass through the mesh The sieve is 8mm and 1mm, and the oversize is crushed and ground, and mixed with the undersize, and the mixed pulp is passed through a cyclone separator to obtain at least 90% of the laterite nickel ore with a particle size of no more than 0.147mm. Enter the super thickener to obtain the underflow pulp with a mass concentration of 26-32%. The pulp larger than 0.147mm is returned to the grinding process. The supernatant is returned to the slurry washing cycle;

[0039] b) High acid leaching: Take 1500g of underflow pulp with a concentration of 30.64%, add 400g of concentrated sulfuric acid for leaching,...

Embodiment 2

[0050] A method for resource processing and comprehensive recycling of laterite nickel ore, comprising the following specific steps:

[0051] a) pretreatment: same as embodiment 1;

[0052] b) High-acid leaching: Take 30kg of underflow pulp with a concentration of 30.64%, add 8.6kg of concentrated sulfuric acid for leaching, the reaction pressure is normal pressure, the reaction temperature is 85-90°C, and the reaction time is 3 hours. slag; the leached slag was washed and dried to obtain 4.75 kg of dry slag, and the combined leaching solution and washing water were 28.64 L of solution. See Table 1 below for specific components;

[0053] Table 1 The specific components of the combined leachate and washing water

[0054] the element

Fe

Ni

co

Mg

mn

sulfuric acid

Contentg / L

21.65

4.63

0.10

34.86

0.77

18.67

[0055] Table 2 Concrete components of leaching slag

[0056] the element

Fe

Ni

...

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Abstract

The invention discloses a method for laterite-nickel ore resourceful treatment and comprehensive recycling. The method includes the main steps of pretreatment, high acid leaching to obtain silicon, precursor iron extracting through magnetic flocculation iron removal, Ni-Co extraction separation, adsorption to obtain manganese, electric flocculation treatment of waste water and magnesium salt work section. The method for laterite-nickel ore resourceful treatment and comprehensive recycling has the following advantages that (1) the process is short; (2) few types of intermediate materials and washing water are used; (3) the change range of potential of hydrogen (pH) value of a solution is small; (4) the heavy metal treatment cost is low; (5) waste water and waste residues can be comprehensively utilized; (6) the nickel recovery rate is high. By means of the novel process route, resources in laterite-nickel ores can be comprehensively utilized, extraction of nickel, cobalt, manganese, iron, magnesium, silicon and the like is included, intermediate residues are not generated, material reverting is also avoided, the comprehensive processing cost is remarkably reduced, and economic benefits and social benefits are remarkable.

Description

technical field [0001] The invention relates to a hydrometallurgical smelting method, in particular to a smelting process for comprehensive recovery of various elements through hydrometallurgical smelting of laterite nickel ore. Background technique [0002] Lateritic nickel ore is mainly divided into three mineral components with mining value: the limonite layer on the surface, the saprolite layer above the bedrock, and the transition layer between limonite and saprolite. The nickel-containing minerals in limonite are goethite and / or hematite; the nickel-containing minerals in saprolite are mainly magnesite with high magnesium content. The content of main elements in laterite nickel ore is arranged from high to low: silicon dioxide, magnesium, iron, nickel, aluminum, of which the content of silicon dioxide, magnesium and iron is 20-25 times and 10-20 times that of nickel, respectively. And 10 to 15 times. [0003] In the existing wet nickel extraction metallurgical proces...

Claims

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Application Information

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IPC IPC(8): C22B1/00C22B3/08C22B23/00C22B47/00C22B26/22C22B3/26
CPCY02P10/20
Inventor 何嘉靖朱红斌杨声全覃一峰
Owner 广西银亿再生资源有限公司
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