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Method for extracting copper from bound-type oxidized copper ore by wet process

A technology of copper oxide ore and wet method, applied in the field of wet copper extraction, can solve problems such as poor effect, and achieve the effects of easy implementation, no smoke pollution, and simple operation.

Active Publication Date: 2015-10-14
西安西北有色地质研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the beneficiation and leaching process of copper ore, there is a type of ore that is difficult to process, the so-called bonded copper oxide ore, which refers to a part of the copper oxide combined with the gangue in a certain form, or mechanically becomes Inclusions of extremely finely dispersed copper minerals, or chemically isomorphic or adsorbed impurities, combined with copper oxide in various forms and loose muddy silicon-aluminum, calcium-magnesium, or iron-manganese oxides Combination also refers to the use of H in the process of chemical analysis 2 SO 4 -Na 2 SO 3 After leaching, bromine-methanol leaching, and cyanide leaching of sulfide phase and free oxidation phase copper minerals, the remaining copper in the leaching residue needs to be dissolved in HF. This type of copper minerals is difficult to use for mechanical beneficiation. However, the sulfuric acid leaching method commonly used for free copper oxide is not effective, and the extraction of copper in copper oxide ore has always been a difficult technical problem in this field.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment includes the following steps:

[0027] Step 1: Crushing the combined copper oxide ore and then grinding to a particle size of 0.074 mm to 0.15 mm to obtain ore powder; the mass content of copper in the combined copper oxide ore is 1.08%, and the combined copper oxide ore in the combined copper oxide ore is The phase occupancy rate is 44.76%;

[0028] Step 2. Mix the lye and the ore powder described in step 1 uniformly at a mass ratio of 1.036:1, and stir for 60 minutes at a temperature of 90° C. for pretreatment, and obtain pretreatment liquid and pretreatment slag after filtering; The lye is a sodium hydroxide solution with a mass concentration of 3.47%;

[0029] Step 3, mix the water and the pretreated slag described in step 2 uniformly at a mass ratio of 2:1 to obtain a solid-liquid mixture, then add concentrated sulfuric acid to the solid-liquid mixture, and mix the solid-liquid mixture under stirring conditions Carry out acid leaching treatment, o...

Embodiment 2

[0034] This embodiment includes the following steps:

[0035] Step 1: Crushing the combined copper oxide ore and then grinding to a particle size of 0.074 mm to 0.15 mm to obtain ore powder; the mass content of copper in the combined copper oxide ore is 1.2%, and the combined copper oxide ore in the combined copper oxide ore is The phase occupancy rate is 48.36%;

[0036] Step 2. Mix the lye and the ore powder described in step 1 uniformly according to the mass ratio of 1.53:1, and stir for 240 min at a temperature of 60°C for pretreatment, and obtain pretreatment liquid and pretreatment slag after filtering; The lye is a sodium hydroxide solution with a mass concentration of 1.96%;

[0037] Step 3, mix the water and the pretreated slag described in step 2 uniformly according to the mass ratio of 1.5:1 to obtain a solid-liquid mixture, then add concentrated sulfuric acid to the solid-liquid mixture, and stir the solid-liquid mixture Carry out acid leaching treatment, obtain ...

Embodiment 3

[0043] This embodiment includes the following steps:

[0044] Step 1: Crushing the combined copper oxide ore and then grinding to a particle size of 0.074 mm to 0.15 mm to obtain ore powder; the mass content of copper in the combined copper oxide ore is 2.07%, and the combined copper oxide ore in the combined copper oxide ore is The phase occupancy rate is 50.91%;

[0045] Step 2, mix the lye and the ore powder described in step 1 uniformly at a mass ratio of 1.29:1, stir for 240 min at a temperature of 85°C for pretreatment, and obtain pretreatment liquid and pretreatment slag after filtering; The lye is a sodium hydroxide solution with a mass concentration of 6.98%;

[0046] Step 3, mix the water and the pretreated slag described in step 2 uniformly in a mass ratio of 3:1 to obtain a solid-liquid mixture, then add concentrated sulfuric acid to the solid-liquid mixture, and stir the solid-liquid mixture Carry out acid leaching treatment, obtain copper-containing acid leachi...

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Abstract

The invention discloses a method for extracting copper from bound-type oxidized copper ore by a wet process. The method comprises the steps of (1) crushing the bound-type oxidized copper ore and grinding to obtain ore powder; (2) pretreating the ore powder by alkali liquid to obtain pretreated liquid and pretreated residue; (3) carrying out acid leaching treatment on the pretreated residue, and filtering to obtain copper-containing acid leachate; and (4) extracting copper from the copper-containing acid leachate to obtain copper sponge. According to the method, the ore powder of the bound-type oxidized copper ore is pretreated by the alkali liquid, the leaching of copper from the bound-type oxidized copper ore is achieved by the acid leaching treatment process, and a copper sponge product is obtained by further recovery. The method has obvious extracting effect on copper in the bound-type oxidized copper ore with a copper bound-type phase accounting for 40% or above, and the copper extraction rate can reach 80-93.5%.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy of nonferrous metals, and in particular relates to a method for extracting copper by wet method from bonded copper oxide ore. Background technique [0002] In the beneficiation and leaching process of copper ore, there is a type of ore that is difficult to process, the so-called bonded copper oxide ore, which refers to a part of the copper oxide combined with the gangue in a certain form, or mechanically becomes Inclusions of extremely finely dispersed copper minerals, or chemically isomorphic or adsorbed impurities, combined with copper oxide in various forms and loose muddy silicon-aluminum, calcium-magnesium, or iron-manganese oxides Combination also refers to the use of H in the process of chemical analysis 2 SO 4 -Na 2 SO 3 After leaching, bromine-methanol leaching, and cyanide leaching of sulfide phase and free oxidation phase copper minerals, the remaining copper in the leaching...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/08C22B3/46C22B15/00
CPCY02P10/20
Inventor 李洁孔令采马晶向虹黄孟魁翟旭东王明
Owner 西安西北有色地质研究院有限公司
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