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Method for producing electrolytic nickel by leaching chemically precipitated nickel sulfide with pure oxygen

A technology of chemical precipitation and nickel sulfide, applied in optics, improvement of process efficiency, photographic technology, etc., can solve problems such as unsuitable treatment of chemical composition nickel sulfide, equipment corrosion suitable for resource range, high operating cost, etc., and reach the scope of mineral resource utilization wide, small investment, low production cost effect

Inactive Publication Date: 2012-06-20
SHAANXI HUAZE NICKEL & COBALT METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

②Copper ion replacement method is suitable for treating nickel sulfide with relatively stable chemical composition, but it needs a large amount of copper ions
However, the above-mentioned process methods all have the disadvantages of large investment, high energy consumption, high operating cost, severe equipment corrosion, small scope of adaptability to resources, and high production cost, especially not suitable for processing nickel sulfide with complex chemical composition.

Method used

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  • Method for producing electrolytic nickel by leaching chemically precipitated nickel sulfide with pure oxygen
  • Method for producing electrolytic nickel by leaching chemically precipitated nickel sulfide with pure oxygen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A. At 30m 3 Add 20m 3 The second-stage high-pressure leaching filtrate, put in 2 tons of nickel sulfide, add sulfuric acid solution, control the concentration of sulfuric acid to 0.2mol / L, and stir and slurry for 30 minutes.

[0033] B. Transport the pulped material to the first stage of atmospheric pressure leaching tank for a stage of oxygen atmospheric pressure leaching, adjust with nickel carbonate and keep the pH value to 4.5, heat to 70 ° C, and the oxygen flow rate per hour is 20m 3 (Oxygen 1m per hour per square solution 3 ), oxygen purity ≥ 95%, and after stirring for 2 hours, filter to obtain a filter residue and filtrate. The filtrate is oxidized and neutralized with an oxidant to remove cobalt and then filtered to obtain cobalt removal slag and cobalt removal filtrate. Cobalt removal slag discharge system, cobalt removal filtrate electrolysis, Electrolytic nickel and anolyte are obtained, a part of the anolyte is added with sodium carbonate to precipitate ...

Embodiment 2

[0037] A. At 30m 3 Add 16m into the stirring tank 3 The second-stage high-pressure leaching filtrate, put in 2 tons of nickel sulfide, add sulfuric acid solution, control the concentration of sulfuric acid to 0.3mol / L, and stir and slurry for 30 minutes.

[0038] B. Transport the pulped material to the first stage of atmospheric pressure leaching tank for a stage of oxygen atmospheric pressure leaching, adjust with nickel carbonate and keep the pH value to 5.0, heat to 80 °C, and the oxygen flow rate per hour is 32m 3 (Oxygen 2m per hour per square solution 3 ), oxygen purity ≥ 95%, filtered after stirring for 3 hours to obtain a filter residue and filtrate, the filtrate was oxidized and neutralized with an oxidant to remove cobalt and then filtered to obtain cobalt-removed residue and cobalt-removed filtrate, cobalt-removed residue was discharged from the system, and cobalt-removed filtrate was electrolyzed , to obtain electrolytic nickel and anolyte, a part of the anolyte ...

Embodiment 3

[0042] A. At 30m 3 Add 18m into the stirring tank 3 The second-stage high-pressure leaching filtrate, put in 2 tons of nickel sulfide, add sulfuric acid solution, control the concentration of sulfuric acid to 0.25mol / L, and stir and slurry for 30 minutes.

[0043] B. Transport the pulped material to the first stage of atmospheric pressure leaching tank for a stage of oxygen atmospheric pressure leaching, adjust and maintain the pH value to 4.8 with nickel carbonate, heat to 75°C, and the oxygen flow rate per hour is 27m 3 (Oxygen 1.5m per hour per square solution 3), oxygen purity ≥ 95%, stirring for 2.5 hours and filtering to obtain a filter residue and filtrate, the filtrate is oxidized and neutralized with an oxidant to remove cobalt and then filtered to obtain cobalt removal residue and cobalt removal filtrate, cobalt removal residue discharge system, cobalt removal filtrate electrolysis, Electrolytic nickel and anolyte are obtained, a part of the anolyte is added with s...

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Abstract

The invention discloses a method for producing electrolytic nickel by leaching chemically precipitated nickel sulfide with pure oxygen, comprising the following steps: mixing and pulpifying chemically precipitated nickel sulfide and high pressure leachate based on the mass ratio of (8-10):1, performing one-stage atmospheric pressure leaching on the pulpified material, removing impurities from one-stage leachate and electrolyzing, producing electrolytic nickel and anolyte, mixing one-stage leached residue with anolyte for secondary pulpifying, further leaching by two-stage high pressure, and returning the obtained leached filtrate to one-stage pulpifying for utilization. The process technique has widely utilized resources, simple technical route, small investment, low energy consumption, no environment pollution, high leaching rate of nickel and cobalt, simple and convenient operation and low production cost, and provides an effective and economical way for producing electrolytic nickel in nickel sulfide concentrates.

Description

technical field [0001] The invention relates to a method for extracting nickel from chemically precipitated nickel sulfide by pure oxygen leaching, in particular to a method for extracting nickel and cobalt by pure oxygen leaching from nickel sulfide with complex chemical composition. Background technique [0002] Chemically precipitated nickel sulfide mainly comes from the solution of laterite nickel ore leached with sulfuric acid or ammonia. 2 S or H 2 The metal sulfides formed by S precipitation. At present, the treatment processes for chemically precipitated nickel sulfide mainly include: ①Roasting and oxidation to form nickel oxide, which is suitable for treating nickel sulfide with low iron content. The process is simple and sulfur can be used. ②The copper ion replacement method is suitable for the treatment of nickel sulfide with a relatively stable chemical composition, but a large amount of copper ions is required. ③Blowing into high nickel matte, further casting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C25C1/08C22B23/00
CPCY02P10/20
Inventor 金国泉赵淳羽
Owner SHAANXI HUAZE NICKEL & COBALT METAL
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