Vulcanization-oxidization mixing copper ore floatation method

A technology for flotation of mixed copper ore and minerals, applied in flotation, solid separation and other directions, can solve the problems of poor economic benefit, large consumption of mineral processing agents, low recovery rate of copper concentrate, etc. rate and concentrate quality, and the effect of reducing flotation equipment and energy consumption

Inactive Publication Date: 2008-06-04
CENT SOUTH UNIV
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AI Technical Summary

Problems solved by technology

Therefore, the use of conventional flotation methods to produce copper concentrates has problems

Method used

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  • Vulcanization-oxidization mixing copper ore floatation method

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Effect test

Embodiment 1

[0017] Using a copper mine in Hunan with 0.91% Cu and 11.65% S in the raw ore, the phase analysis of copper minerals shows that 26.5% of the copper minerals exist in the form of copper oxide, and the rest are copper sulfide minerals. Mainly mine. Other minerals are mainly pyrite, pyrrhotite, magnetite, etc., and gangue minerals are mainly quartz, calcite, etc. The mineral is ball-milled with a wet ball mill so that the particle size of the product is -0.074mm and accounts for about 80%. figure 1 As shown, ethyl amyl xanthate formate is added during the grinding process, and the addition amount is 28g / t raw ore, and the pH of the grinding system is controlled at pH 10. Grinding products go directly to flotation without desliming. Flotation includes one fast separation, one rough separation, one sweep and three selections. During fast separation, 20g / t raw ore of nonylhydroxamic acid and 20g / t raw ore of foaming agent are added; during rough separation, amyl hydroxamic acid is...

Embodiment 2

[0019] Using a copper mine in Yunnan that contains 1.12% Cu and 12.77% S in the original ore, the phase analysis of copper minerals shows that 27.3% of the copper minerals exist in the form of copper oxide, and the rest are copper sulfide minerals. Mainly mine. Other minerals are mainly pyrite, arsenopyrite, magnetite, etc., and main gangue minerals are mainly quartz, calcite, etc. The mineral is ball milled with a wet ball mill so that the particle size of the product is -0.074mm and accounts for about 74%. figure 1 As shown, ethyl amyl xanthate formate is added during the grinding process, the addition amount is 40g / t raw ore, and the pH of the grinding system is controlled at pH 9.8. Grinding products go directly to flotation without desliming. Flotation includes one quick separation, one rough separation, one sweep and three times of beneficiation. During the fast separation, 30g / t raw ore of nonylhydroxamic acid and 28g / t raw ore of foaming agent are added; during the r...

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Abstract

The invention discloses a sulfurization-oxidation mixed copper mine flotation method, comprising the steps of ore grinding and copper flotation: 20 to 50g/t of pentyl xanthic acid ethyl formate raw ore is added in the grinding process; meanwhile, a pH adjusting agent is added to lead the pH of the mine slurry to keep between 9.5 and 10.5; the invention comprises one time of fast selection, one time of coarse selection, one time of sweeping selection and three times of precise selection; in the fast selection process, 20 to 30g/t of nonyl hydroxamic acid raw ore is added and 20 to 30g/t of frother raw ore is added; in the coarse selection process, 10 to 30g/t of the pentyl xanthic acid ethyl formate raw ore and 10 to 20g/t of the nonyl hydroxamic acid raw ore as well as 10 to 20g/t of the frother raw ore are added; in the sweeping selection process, 10 to 20g/t of the nonyl hydroxamic acid raw ore is added; the pH of the flotation mine pulp is kept between 9.5 and 10.5 and the copper ore is recovered. Compared with the traditional flotation methods of copper sulphide ore and copper oxide ore, the invention improves the flotation efficiency, reduces flotation equipment and energy loss and increases the copper recovery for more than 10%.

Description

technical field [0001] The invention relates to copper ore flotation, in particular to a sulfide-oxidation mixed copper ore flotation method. Background technique [0002] my country's copper ore reserves are not small, but the average grade of copper mines in my country is only 0.87%, and the grades of super-large copper mines larger than 2 million tons are basically lower than 1%. Most of the copper mineral resources are complex paragenetic ores. Most of the small and medium-sized mines, large-scale deposits accounted for only 2.7%, medium-sized deposits accounted for 8.9%, small-scale deposits accounted for 88.4%. A substantial portion is of the sulphide-oxidation mixed copper ore type, characterized by high copper oxidation rates and complex compositions. The traditional copper ore flotation technology only considers the flotation of copper sulfide ore (comprising primary chalcopyrite, secondary chalcocite, copper ore, etc.), and only considers the use of activators for ...

Claims

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Application Information

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IPC IPC(8): B03D1/004B03D1/008B03D1/00B03B1/00B03B1/04B03D101/02B03D103/02
Inventor 覃文庆何名飞刘三军张雁生王军
Owner CENT SOUTH UNIV
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