A method for recovering copper and cobalt in copper raffinate by using nanofiltration membrane concentration separation-neutralization precipitation

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

Active Publication Date: 2019-10-25
中国有色集团刚果矿业有限公司 +3
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  • Abstract
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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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  • A method for recovering copper and cobalt in copper raffinate by using nanofiltration membrane concentration separation-neutralization precipitation

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 raw material liquid is pretreated by an air flotation degreaser, a multi-media filter, and a security filter to remove oil, organic extractant, Colloidal and granular impurities; the treated feed liquid enters the nanofiltration membrane component through the pressure boosting system for 3 times concentration to obtain the acid-containing 10.5g / L dialysate and copper-rich and cobalt-rich concentrated liquid; return the dialysate to the leaching process ; The copper-rich and cobalt concentrated solution is placed in the neutralization reaction stirring tank, and the mass concentration is 15% lime milk 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 90 minutes of reaction ; put the neutralize...

Embodiment 2

[0044] The cobalt-containing copper raffinate to be treated is centrally stored in the raw material liquid storage tank, and the raw material liquid is pretreated by air flotation degreaser, multi-media filter, security filter, etc. to remove oil and organic extractant contained in the solution , colloid, and granular impurities; the treated feed liquid is concentrated into the nanofiltration membrane component through the pressure lifting system for 3.5 times concentration, and the acid-containing 11.5g / L dialysate and copper-rich and cobalt-rich concentrated liquid are obtained; the dialysate is returned to leaching Process: Copper-rich and cobalt-rich concentrates are placed in a neutralization reaction stirring tank, and milk of lime with a mass concentration of 15% is added at room temperature to adjust and control the pH value of the neutralization reaction of the concentrate to 3, and carry out solid-liquid reaction after 120 minutes of reaction. Separation; put the neut...

Embodiment 3

[0051] The cobalt-containing copper raffinate to be treated is centrally stored in the raw material liquid storage tank, and the raw material liquid is pretreated by an air flotation degreaser, a multi-media filter, and a security filter to remove oil, organic extractant, Colloidal and granular impurities; the treated feed liquid enters the nanofiltration membrane component through the pressure boosting system for 4-fold concentration, and obtains a dialysate containing 11.8g / L sulfuric acid and a concentrated solution rich in copper and cobalt; returns the dialysate to the leaching process ; Copper-rich and cobalt concentrates are placed in the neutralization reaction stirring tank, and the mass concentration is 15% milk of lime 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 90 minutes of reaction ; put the neutr...

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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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Patent Type & Authority Patents(China)
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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