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Method for recovering copper and cobalt in copper raffinate by adopting nanofiltration membrane concentration separation-neutralization and sedimentation

A nanofiltration membrane and raffinate technology, applied in the field of hydrometallurgy, can solve the problems of poor operating environment, large operating pressure, and small processing capacity, achieve significant environmental and economic benefits, improve recycling value, and reduce waste water. The effect of emissions

Active Publication Date: 2017-12-12
中国有色集团刚果矿业有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In addition to the above-mentioned copper raffinate treatment method, CN104131162B discloses a method for comprehensive recovery and recycling of copper raffinate. Diffusion dialysis recovers the valuable metal zinc in the copper extraction residual liquid, which effectively utilizes gold-containing multi-element gold concentrate resources; however, the ion exchange membrane method still has a small amount of treatment when the copper extraction residual liquid is treated, which cannot reduce the discharge of waste liquid Insufficiencies such as impurity removal and acid-containing liquid cannot be discharged directly
However, this method still has the disadvantages of small processing capacity, inability to reduce the discharge of waste liquid, and the inability to directly discharge the acid-containing liquid for removal of impurities.
CN104909497A discloses a method for treating acidic wastewater from non-ferrous metal mines. The method combines oxidation treatment, iron precipitation treatment, membrane treatment, sulfide precipitation, coagulation precipitation and neutralization treatment technologies together, and has good treatment effect and can recycle waste water Valuable metals and other characteristics; but this method also has problems such as complex process flow, poor operating environment during oxidation treatment and vulcanization treatment, low rejection rate of reverse osmosis membrane used and high operating pressure

Method used

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  • Method for recovering copper and cobalt in copper raffinate by adopting nanofiltration membrane concentration separation-neutralization and sedimentation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The cobalt-containing copper raffinate to be treated is centrally stored in the raw material liquid storage tank, and the material liquid is pretreated by an air flotation degreaser, a multi-media filter and a security filter to remove the oil, organic extractant, Colloidal and granular impurities; the treated feed liquid enters the nanofiltration membrane element through the pressure lifting system for 3-fold concentration to obtain 10.5g / L acid-containing dialysate and copper and cobalt-rich concentrates; the dialysate is returned to the leaching process The copper-rich, cobalt-rich concentrated solution is placed in the neutralization reaction stirring tank, and the lime milk with a mass concentration of 15% is added under normal temperature conditions, and the pH value of the neutralization reaction of the concentrated solution is adjusted and controlled to be 3, and the solid-liquid separation is carried out after the reaction for 90min. ; Put the neutralized liquid...

Embodiment 2

[0044] The cobalt-containing copper raffinate to be treated is centrally stored in the raw material liquid storage tank, and the material liquid is pretreated by air flotation degreaser, multi-media filter, security filter, etc. to remove oil and organic extractant contained in the solution. , colloidal and granular impurities; the treated feed liquid enters the nanofiltration membrane element through the pressure lifting system for 3.5 times concentration to obtain 11.5g / L acid-containing dialysate and copper and cobalt-rich concentrates; the dialysate is returned to leaching Process: The copper-rich and cobalt-rich concentrated solution is placed in a neutralization reaction stirring tank, and lime milk with a mass concentration of 15% is added under normal temperature conditions, and the pH value of the neutralization reaction of the concentrated solution is adjusted and controlled to be 3, and the solid-liquid reaction is carried out after 120min. Separation; put the neutra...

Embodiment 3

[0051] The cobalt-containing copper raffinate to be treated is centrally stored in the raw material liquid storage tank, and the material liquid is pretreated by an air flotation degreaser, a multi-media filter and a security filter to remove the oil, organic extractant, Colloidal and particulate impurities; the treated feed liquid enters the nanofiltration membrane element through the pressure lifting system for 4-fold concentration to obtain 11.8g / L sulfuric acid-containing dialysate and copper and cobalt-rich concentrates; the dialysate is returned to the leaching process The copper-rich and cobalt-rich concentrated solution is placed in the neutralization reaction stirring tank, and the lime milk with a mass concentration of 15% is added under normal temperature conditions, and the pH value of the neutralization reaction of the concentrated solution is adjusted and controlled to be 3.2, and the solid-liquid separation is carried out after the reaction for 90 minutes. ; Put ...

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Abstract

The invention belongs to the technical field of wet metallurgy, particularly relates to a method for comprehensively recovering useful resources from a copper raffinate, and especially relates to a method for recovering copper, cobalt and sulfuric acid in the low-cobalt copper raffinate by adopting a nanofiltration membrane concentration separation-neutralization and sedimentation technology. Concretely, the nanofiltration membrane concentration separation technology is adopted for preventing copper, cobalt, iron, calcium, aluminum, arsenic and magnesium in the copper raffinate from entering a concentrated solution, the concentrated solution is treated by chemical precipitation so as to recover valuable metal cobalt and copper, and meanwhile, iron, aluminum, arsenic, calcium and magnesium impurities in the raffinate are open-circuit removed; and a dialysate (a sulfuric acid solution) returns to a leaching system of a copper hydrometallurgy process, so that the aims of recycling the useful resources in the raffinate, purifying and removing impurities are achieved, and meanwhile, the quality requirements of leaching and electrodeposition processes on the solution during copper hydrometallurgy production are met.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, in particular to a method for comprehensively recovering useful resources from copper raffinate, in particular to a method for recovering copper from low-cobalt copper raffinate by using nanofiltration membrane concentration separation and neutralization precipitation technology , cobalt and sulfuric acid method. Background technique [0002] Cobalt metal has the characteristics of good high temperature resistance, corrosion resistance, strong magnetism, etc., and is widely used in aerospace, machinery manufacturing, electrical and electronics, chemistry, ceramics and other industrial fields. , an important raw material for batteries, has special significance in national economic and social development, and is an important strategic metal. [0003] Although cobalt is a small metal, it is a very scarce resource, known as "industrial monosodium glutamate" and "industrial tooth". The world...

Claims

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Application Information

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IPC IPC(8): C22B3/22C22B3/44C22B15/00C22B23/00C22B3/08
CPCC22B3/08C22B3/22C22B3/44C22B15/0086C22B15/0089C22B23/0453C22B23/0461Y02P10/20
Inventor 于文圣李淑梅谢开寿徐文彦李辉张向军林博杨斌王勇
Owner 中国有色集团刚果矿业有限公司
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