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Process for separating copper in nickel-cobalt-copper system by solvent extraction method

An extraction method and solvent technology, which is applied in the technical field of separating copper in nickel-cobalt-copper system by solvent extraction method, can solve the problems of low direct yield, high added value, high production cost, etc., achieve high copper recovery rate, reduce burden, Realize the effect of purification and separation

Inactive Publication Date: 2011-11-09
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the sulfidation precipitation method (sulfur dioxide + sulfur powder) is mainly used to remove copper in the acidic system of nickel-cobalt-copper miscellaneous materials: copper is removed as copper sulfide precipitation, and a certain amount of nickel-cobalt is carried in the copper sulfide slag, and nickel-cobalt and copper need to be further processed. Separation and recovery, high production cost, low direct recovery rate, and copper cannot be directly recovered into high value-added products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] In the nickel-cobalt-copper liquid, the content of each component before copper removal is shown in Table 1-1.

[0016] Table 1-1 Composition in nickel-cobalt-copper system before copper removal (g / l)

[0017] co 2+ Ni 2+ Cu 2+ Fe 2+ Mg 2+ Ca 2+ mn 2+ NH 4+ 35.5 55.6 14.8 3.65 3.68 3.12 1.02 0.5

[0018] In N902-sulfonated kerosene, the volume percentage of N902 is 30%, and the volume percentage of sulfonated kerosene is 70%.

[0019] In a small-scale mixed extraction and clarification tank, N902-sulfonated kerosene and nickel-cobalt-copper feed liquid are mixed at a volume ratio of 4:1, and the pH of the feed liquid is adjusted to 2.5 with sodium carbonate, and 4-stage extraction is carried out at room temperature; each stage of extraction The mixing time was 4 minutes. After clarification and phase separation of the raffinate, 4 mol / L sulfuric acid was used as the stripping agent for the copper-loaded organic phase, and...

Embodiment 4

[0043] In the nickel-cobalt-copper liquid, the content of each component before copper removal is shown in Table 4-1.

[0044] Table 4-1 Composition of pre-copper solution (g / l)

[0045] co 2+ Ni 2+ Cu 2+ Fe 2+ Mg 2+ Ca 2+ mn 2+ NH 4+ 24.75 45.26 12.9 2.89 3.57 2.98 0.87 0.26

[0046] In N902-sulfonated kerosene, the volume percentage of N902 is 28%, and the volume percentage of sulfonated kerosene is 72%.

[0047] In a small-scale mixed extraction and clarification tank, N902-sulfonated kerosene and nickel-cobalt-copper feed liquid were mixed at a volume ratio of 3.9:1, and the pH of the feed liquid was adjusted to 2.5 with sodium carbonate, and 4 stages of extraction were carried out at room temperature; each stage of extraction 3 minutes. After clarification and phase separation of the raffinate, 4 mol / L sulfuric acid was used as the stripping acid for the copper-loaded organic phase, and the volume ratio of the organic phase...

Embodiment 5

[0052] In the nickel-cobalt-copper liquid, the content of each component before copper removal is shown in Table 5-1.

[0053] Table 5-1 Composition of pre-copper solution (g / l)

[0054] co 2+ Ni 2+ Cu 2+ Fe 2+ Mg 2+ Ca 2+ mn 2+ NH 4+ 28.4 50.1 3.2 2.56 1.75 1.20 1.07 0.20

[0055]In N902-sulfonated kerosene, the volume percentage of N902 is 20%, and the volume percentage of sulfonated kerosene is 80%. In a small-scale mixed extraction and clarification tank, N902-sulfonated kerosene and nickel-cobalt-copper feed liquid are mixed at a volume ratio of 3:1, and the pH of the feed liquid is adjusted to 2.5 with sodium carbonate, and 3-stage extraction is carried out at room temperature; each stage of extraction 3 minutes. After clarification and phase separation of the raffinate, 3.9 mol / L sulfuric acid was used as the stripping acid for the copper-loaded organic phase, and the volume ratio of the organic phase to the stripping aci...

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Abstract

The invention provides a process for separating copper in a nickel-cobalt-copper system by a solvent extraction method. The process comprises the following steps: by taking N902-sulfonated kerosene as an extracting agent, controlling the volume ratio of an organic phase to a water phase at (3:1) to (4:1); regulating the pH value of a material liquid to 2.0-2.5; extracting at room temperature; and after carrying out clearing and phase separation on raffinate, based on sulfuric acid as a reverse extraction acid for the copper-supported organic phase, controlling the volume ratio of the organic phase to the reverse extraction acid at (6:1)-(4:1), carrying out reverse extraction at room temperature, and eluting a reverse extraction liquid to obtain a copper sulfate solution. In the process, the N902-sulfonated kerosene is used as the extracting agent, sulfuric acid is used as a reverse extraction agent, copper is separated out of the high-concentration nickel-cobalt-copper system in a high selectivity and high reverse extraction property mode, and copper is output in a pure copper sulfate solution form, thereby avoiding the retreatment and recovery of copper slag with a chemical method, and the recovery of copper is high; and after nickel-cobalt raffinate with copper removed is subjected to sodium jarosite iron removal, P204 deep impurity removal and P507 separation of nickel-cobalt, nickel-cobalt salt products are produced, thereby achieving the purification and separation of copper in a nickel-cobalt-copper impure material and the comprehensive recovery of nickel-cobalt-copper.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal smelting, and relates to a method for extracting copper from a nickel-cobalt-copper system, in particular to a process for separating copper in the nickel-cobalt-copper system by a solvent extraction method. Background technique [0002] In the field of metallurgy and chemical industry, complex acidic systems containing cobalt, nickel, copper, iron, calcium, magnesium and other metals are often produced, which are usually called "nickel-cobalt-copper miscellaneous materials". There are two main sources of nickel-cobalt-copper miscellaneous materials: one is nickel-cobalt sulfide produced by high-pressure acid leaching and ammonium sulfide precipitation of laterite ore. After roasting, desulfurization and leaching, the solution contains cobalt, nickel, copper , iron, calcium, magnesium and other metals; the other is copper-containing, manganese-containing, zinc-containing cobalt carbonate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/34C22B15/00
CPCY02P10/20
Inventor 卓文叶先英
Owner JINCHUAN GROUP LIMITED
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