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Method for extracting nickel from high-grade matte nickel leaching residues

A technology for leaching slag and nickel matte, which is applied in the field of metallurgy, can solve problems such as no effective methods, and achieve the effects of quick results, easy precipitation, and short process flow

Active Publication Date: 2021-12-07
GUANGDONG BRUNP RECYCLING TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no effective method for the recovery and treatment of nickel in high-nickel matte leaching slag

Method used

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  • Method for extracting nickel from high-grade matte nickel leaching residues

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Effect test

Embodiment 1

[0033] This embodiment extracts nickel and prepares nickel sulfate from high nickel matte leaching slag, high nickel matte leaching slag composition: nickel 7.38%, copper 42.3%, iron 10.9%, sulfur 23.35%, refer to figure 1 , proceed through the following steps:

[0034] (1) Raw material pretreatment: high matte leaching slag is ball milled into powder;

[0035] (2) Sulfur oxidation: Add sulfur-dissolved carbon disulfide to the powder obtained in step (1), the concentration of sulfur is 700g / L, and the solid-liquid ratio is controlled to be 1g:0.5mL, the reaction temperature is 120°C, and the reaction time for 1h;

[0036] (3) Filtration treatment: after step (2) reaction finishes, obtain filtrate and filter residue through solid-liquid separation, and filtrate is organic solvent, can recycle after supplementing sulfur;

[0037] (4) Copper replacement: Add concentration to the obtained filter residue of step (3) and be the copper sulfate solution of 4.0mol / L, and control the ...

Embodiment 2

[0043] In this embodiment, nickel is extracted from high nickel matte leaching slag and nickel sulfate is prepared. The components of high nickel matte leaching slag are: 5.58% nickel, 55.7% copper, 8.66% iron, and 20.37% sulfur, carried out through the following steps:

[0044] (1) Raw material pretreatment: high matte leaching slag is ball milled into powder;

[0045] (2) Sulfur oxidation: in the powder material gained in step (1), add in the carbon tetrachloride that dissolves sulfur, the concentration of sulfur is 10g / L, and control solid-liquid ratio is 1g: 5mL, and reaction temperature is 80 ℃, The reaction time is 5h.

[0046](3) Filtration treatment: after step (2) reaction finishes, obtain filtrate and filter residue through solid-liquid separation, and filtrate is organic solvent, can recycle after supplementing sulfur;

[0047] (4) Copper replacement: Add concentration to the obtained filter residue of step (3) and be the copper sulfate solution of 0.1mol / L, and co...

Embodiment 3

[0053] This embodiment extracts nickel from high nickel matte leaching slag and prepares nickel sulfate, high nickel matte leaching slag, composition: nickel 6.28%, copper 58.73%, iron 9.32%, sulfur 17.23%, carry out by following steps:

[0054] (1) Raw material pretreatment: high matte leaching slag is ball milled into powder;

[0055] (2) Sulfur oxidation: add decahydronaphthalene with sulfur dissolved in the powder obtained in step (1), the concentration of sulfur is 350g / L, and the solid-liquid ratio is controlled to be 1g: 2.5mL, and the reaction temperature is 100°C. The reaction time is 3h.

[0056] (3) Filtration treatment: after step (2) reaction finishes, obtain filtrate and filter residue through solid-liquid separation, and filtrate is organic solvent, can recycle after supplementing sulfur;

[0057] (4) Copper replacement: Add concentration to the obtained filter residue of step (3) and be the copper sulfate solution of 2.0mol / L, and control the solid-liquid rati...

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Abstract

The invention discloses a method for extracting nickel from high-grade matte nickel leaching residues. The method comprises the following steps of firstly, adding a crushed material of the high-grade matte nickel leaching residues into an organic solvent dissolved with sulfur, heating for reaction, carrying out solid-liquid separation to obtain first filtrate and first filter residues, adding the first filter residues into a copper sulfate solution, heating for reaction, carrying out solid-liquid separation to obtain second filtrate and second filter residues, carrying out evaporation condensation concentration on the second filtrate, and filtering to obtain copper sulfate crystals and nickel-containing filtrate. According to the method, Cu2S, Ni3S2, CuFeS2, a nickel-iron-copper alloy and the like in the high-grade matte nickel leaching residues are oxidized into CuS, NiS and FeS by utilizing the oxidability of elemental sulfur in the organic solvent, the elemental sulfur in the high-grade matte nickel leaching residues is dissolved in the solvent in the presence of the organic solvent, then NiS and FeS are replaced by more insoluble CuS by adopting a copper sulfate solution, nickel ions and ferrous ions enter the solution, and the copper content in the leaching residues is further improved. Only a small amount of sulfur and copper sulfate are consumed in the whole reaction, and the organic solvent can be recycled.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for extracting nickel from high nickel matte leaching slag. Background technique [0002] High nickel matte is a sulfide eutectic of nickel, copper, cobalt, iron and other metals formed by primary smelting of nickel concentrate through electric converter. It can be used to produce electrolytic nickel, nickel oxide, ferronickel, nickel-containing alloys and various nickel salts. It can also be directly used in steelmaking after special treatment. [0003] After fine grinding and crushing of high-grade nickel matte, it is separated by flotation and magnetic separation to obtain nickel concentrate containing 67%-68% nickel. At the same time, copper concentrate and copper-nickel alloy are selected to recover copper and platinum group gold respectively. The nickel concentrate is melted in a reverberatory furnace to obtain nickel sulfide, and then sent to elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B23/00C22B15/00C22B3/38
CPCC22B7/006C22B23/04C22B15/0063Y02P10/20C22B3/44C22B7/005C22B3/3846C22B3/3844C01G3/10C22B3/22C22B23/0461
Inventor 余海军谢英豪李爱霞张学梅李长东
Owner GUANGDONG BRUNP RECYCLING TECH
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