Method for removing arsenic from copper ore

A technology for copper ore and arsenic copper ore, which is applied to the improvement of process efficiency, flotation, solid separation, etc., can solve the problems of poor dearsenic effect of copper ore, and achieve good arsenic removal effect, strong inhibitory effect, and simple process flow Effect

Active Publication Date: 2019-01-25
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the poor arsenic removal effect of copper ore in the existing copper-arsenic flotation separation, the present invention provides a method for removing arsenic from copper ore, which can effectively remove arsenic in copper ore and simultaneously realize sulfidation Simultaneous recovery of copper and copper oxide

Method used

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  • Method for removing arsenic from copper ore

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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the Cu grade of a copper mine in Yunnan is 0.68%, and the As grade is 4.80%. The specific steps are as follows:

[0025] (1) Roughly grind arsenic-containing copper ore to a fineness of -0.074mm, accounting for 50%. When grinding, add lime to make the slurry pH=10. After the first flotation of the slurry, the crude copper concentrate and the first flotation tail are obtained. Mine, flotation agents and their order of addition are inhibitors (10% ammonium chloride, 10% aluminum sulfate, 80% sodium thiosulfate) 300g / t, xanthate 10g / t and pinitol oil 15g / t, The slurry concentration is 20%;

[0026] (2) After the second flotation of the copper coarse concentrate, the copper concentrate and the second flotation tailings are obtained respectively, and the second flotation tailings are returned to the coarse grinding operation, and the flotation inhibitor (chlorinated Ammonium 10%, aluminum sulfate 10%, sodium thiosulfate 80%) dosage is 250g / t, flotatio...

Embodiment 2

[0031] Such as figure 1 As shown, the Cu grade of a copper mine in Jiangxi is 2.08%, and the As grade is 6.43%. The specific steps are as follows:

[0032] (1) Roughly grind arsenic-containing copper ore to a fineness of -0.074mm, accounting for 60%. When grinding, add lime to make the slurry pH=11. After the first flotation of the slurry, the copper concentrate and the first flotation tail are obtained. Mine, flotation agents and their order of addition are inhibitors (10% ammonium chloride, 80% aluminum sulfate, 10% sodium thiosulfate) 1000g / t, xanthate 100g / t and pinitol oil 50g / t, The slurry concentration is 30%;

[0033] (2) After the second flotation of the copper coarse concentrate, the copper concentrate and the second flotation tailings are obtained respectively, and the second flotation tailings are returned to the coarse grinding operation, and the flotation inhibitor (chlorinated Ammonium 10%, aluminum sulfate 80%, sodium thiosulfate 10%) The dosage is 500g / t, and the...

Embodiment 3

[0038] Such as figure 1 As shown, the Cu grade of a copper flotation concentrate in Sichuan is 14.08% and the As grade is 2.61%. The steps are as follows:

[0039] (1) Roughly grind arsenic-containing copper ore to a fineness of -0.074mm, accounting for 70%. When grinding, add lime to make the slurry pH=12. After the first flotation of the slurry, a crude copper concentrate and a flotation tail are obtained. Mine, flotation agents and their order of addition are inhibitors (40% ammonium chloride, 30% aluminum sulfate, 30% sodium thiosulfate) 1500g / t, xanthate 150g / t and pinitol oil 75g / t, The slurry concentration is 45%;

[0040] (2) After the second flotation of the copper coarse concentrate, the copper concentrate and the second flotation tailings are obtained respectively, and the second flotation tailings are returned to the rough grinding operation, and the flotation inhibitor (chlorinated Ammonium 40%, aluminum sulfate 30%, sodium thiosulfate 30%) The dosage is 1000g / t, and...

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Abstract

The invention discloses a method for removing arsenic from copper ore. The method comprises the steps of subjecting arsenic-containing copper ore to primary flotation after coarse grinding to obtain coarse copper concentrates and primary flotation tailings, subjecting the coarse copper concentrates to secondary flotation for arsenic removal to obtain copper concentrates and secondary flotation tailings, subjecting the secondary flotation tailings to coarse grinding, subjecting the primary flotation tailings to tertiary flotation after fine grinding to obtain tertiary flotation concentrates andtertiary flotation tailings, subjecting the tertiary flotation concentrates to primary floatation, leaching the tertiary flotation tailings in an ultrasonic wave radiation environment according to aleaching method to obtain leaching slags and leachate, subjecting the leachate to sulfide precipitation after oxidation to be purified, putting sediments and the leaching slags into the tailings, andtaking the precipitated filtrate as a copper pregnant solution. The method has the advantages of simplicity in process, easiness in implementation, good arsenic removal effect on the copper ore, capability of treating arsenic-containing complex copper ore containing copper sulfide and copper oxide, and wide application to copper ore arsenic removal in the industry.

Description

Technical field [0001] The invention relates to a method for removing arsenic from copper ore, and belongs to the technical field of mineral processing. Background technique [0002] Copper is a metal with strategic value and plays an important role in the construction of the national economy. With the development of society, the demand for copper is increasing day by day. According to the survey data of the National Bureau of Statistics, my country's copper consumption in 2006 was 3.4 million tons, and by 2016, my country's copper consumption has increased to 10.2 million tons, and continues to maintain Rising trend. However, with the large-scale development of copper ore resources in recent years, there are fewer and fewer rich ore resources, and the overall resources tend to be depleted. At the same time, a large number of copper mines have high levels of harmful impurities. Although the current various copper sulfide smelting processes are relatively mature, But most of them...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/11C22B3/14C22B3/44C22B15/00B03D1/002B03D1/018B03B1/00B03D101/06B03D103/02
CPCB03B1/00B03D1/002B03D1/018B03D2201/06B03D2203/02C22B1/11C22B3/14C22B3/44C22B15/0008C22B15/0078C22B15/0089Y02P10/20
Inventor 罗斌赖浩刘全军
Owner KUNMING UNIV OF SCI & TECH
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