Separation method of nickel in sulfate solution

A separation method, sulfate technology, applied in the direction of improving process efficiency, etc., can solve the problems of difficult to achieve continuous operation, cumbersome operation process, etc., and achieve the effect of low equipment requirements, low reagent consumption, and short operation process

Inactive Publication Date: 2018-03-02
BEIJING GENERAL RES INST OF MINING & METALLURGY
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Problems solved by technology

Since the raw material contains NH 4 + , so the cobalt leaching solution contains NH 4 + , the cobalt leaching solution will contain NH 4 + , for example: the cobalt-extracting solution obtained by NaOH saponification is a high-concentration sodium sulfate solution containing ammonium sulfate, and the cobalt-extracting solution obtained by ammonia saponification is a high-concentration ammonium sulfate solution; this high-concentration ammonium sulfate solution may contain ammonium sulfate In the high-concen

Method used

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  • Separation method of nickel in sulfate solution

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Effect test

Embodiment 1

[0036] Such as figure 1 Shown, a kind of separation method of nickel in sulfate solution is used for processing the solution after cobalt extraction, and the concentration of ammonium sulfate in the solution after cobalt extraction is 200g / L, and the concentration of nickel ions is 2.5g / L. The method may include the steps of:

[0037]Step a1, using ammonia water to adjust the pH value of the cobalt-extracted solution to 9-10, then using No. 260 solvent oil as a diluent, and using nickel extractant LIX984 as an organic phase to extract and separate nickel. The volume concentration of nickel extractant LIX984 is 10 %, the extraction ratio O / A=1:1, the number of extraction stages is 3, and the mixing time is 3min, thereby obtaining a nickel-loaded organic phase and an ammonium sulfate raffinate containing 0.9mg / L of nickel.

[0038] Step b1, washing and back-extracting the nickel-loaded organic phase, the washing ratio O / A=15:1, the number of washing stages is 2, the back-extrac...

Embodiment 2

[0040] Such as figure 1 Shown, the separation method of nickel in a kind of vitriol salt solution is used for processing the solution after a certain cobalt extraction, and the concentration of ammonium sulfate in the solution after the extraction of cobalt is 20g / L, sodium sulfate concentration 150g / L, nickel ion concentration is 1.5g / L, the separation method may comprise the following steps:

[0041] Step a2, using ammonia water to adjust the pH value of the cobalt-extracted solution to 9-10, then using No. 260 solvent oil as the diluent, and using nickel extractant LIX984 as the organic phase to extract and separate nickel, the volume concentration of the nickel extractant LIX984 is 10 %, the extraction ratio O / A=2:1, the number of extraction stages is 3, and the mixing time is 3min, thereby obtaining a nickel-loaded organic phase and an ammonium sulfate raffinate containing 0.7mg / L of nickel.

[0042] Step b2, washing and back-extracting the nickel-loaded organic phase, t...

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Abstract

The invention discloses a separation method of nickel in a sulfate solution. The separation method includes the steps of: adjusting the pH value of a solution after cobalt extraction to 7-10 via a complexing neutralizer, and extracting and separating nickel with 260# solvent oil as a diluent and a nickel extraction agent as an organic phase to obtain an organic phase supporting nickel and a sulfate raffinate; and washing and reversal-extracting the organic phase supporting nickel to prepare a reversal-extract containing nickel and an organic phase. The method can effectively separate nickel ina high-concentration sulfate solution, is low in energy and reagent consumption, has short operation process, is low in equipment demand and can easily achieve continuous operation.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, and relates to a method for separating nickel in a sulfate solution. The sulfate solution especially refers to the sulfate solution obtained after the cobalt intermediate product is leached with sulfuric acid and cobalt is extracted, and the solution mainly contains one or both of ammonium sulfate and sodium sulfate. Background technique [0002] Cobalt is an important strategic metal and a key functional element in materials such as lithium batteries and hard alloys. For a long time, my country's cobalt resources have been in serious shortage, and cobalt production mainly comes from by-products of nickel and copper metallurgical processes. About 90% of my country's annual demand for cobalt resources depends on imports. However, as cobalt resource exporting countries restrict the export of raw ore, my country imports less and less cobalt raw ore. Therefore, most of them are cobalt smelti...

Claims

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Application Information

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IPC IPC(8): C22B3/26C22B23/00
CPCC22B23/0492C22B3/26Y02P10/20
Inventor 尹飞张永禄王振文揭晓武崔成旺
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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