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Novel ore grinding method used for optimizing copper ore flotation behavior

A grinding and behavioral technology, applied in grain processing, etc., can solve the problems of large grinding power consumption, high cost of media wear, and steel ball iron pollution, so as to improve the degree of monomer dissociation and reduce grinding power consumption , Reduce the effect of medium wear

Inactive Publication Date: 2017-09-15
NORTHEASTERN UNIV
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Problems solved by technology

[0004] (1) Steel balls are currently used as the grinding medium. The steel balls are severely worn and produce a large amount of iron pollution. During the grinding process, the surface of copper minerals will be covered, which is not conducive to the recovery of copper minerals;
[0005] (2) The particle size distribution of grinding products is uneven, and the particle size of over-grinding and under-grinding is more, which affects the quality of flotation concentrate products;
[0006] (3) The grinding efficiency is low, the cost of media wear is high, the power consumption of grinding is large, and the phenomenon of slurry agglomeration and ball paste is prone to occur

Method used

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specific Embodiment

[0030] For the grinding operation of copper ore in a copper ore dressing plant in Jiangxi, alumina ceramic balls are selected as the grinding medium, calculated by mass percentage: Al in alumina ceramic balls 2 o 3 The content is 91.5%, SiO 2 4.5% for CaO, 1.8% for CaO, 2% for MgO, and 0.2% for Fe. Alumina ceramic balls have a Mohs hardness of 8.8 and a specific gravity of 4.6g / cm 3 . select Φ 1 =20mm, Φ 2 =15mm and Φ 3 = 5mm three specifications of alumina ceramic balls, their proportions are 50%, 30%, and 20% respectively, the filling rate of the mill medium is 50%, the total filling rate of the medium slurry mixture is 75%, and the grinding concentration is 65% , the pulp temperature is 35°C, the addition amount of the grinding aid sodium hexametaphosphate is 140g / t, the pH of the pulp is controlled at 11, and the grinding product with a particle size of -0.043mm accounting for 85% is obtained. Then under the condition that other beneficiation processes are constant,...

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Abstract

The invention discloses a novel ore grinding method used for optimizing a copper ore flotation behavior. According to the novel ore grinding method, a vertical stirring grinder is used as ore grinding main equipment, aluminum oxide ceramic balls are adopted as ore grinding media, the ore grinding conditions such as the filling rate, the pulp density, the pulp temperature, the pulp pH, grinding aid types and contents and other factors are strictly controlled, the single separation degree of ore can be improved easily, ore grinding products evener in particle size are obtained, and beneficial conditions are created for subsequent copper ore flotation operation. According to the method, the ore grinding time is shortened by 60%, the ore grinding power consumption is reduced by 40%, medium wear is reduced by 75%, the copper concentrate grade is improved by 2.46%, and the recovery rate is improved by 8.15%.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal beneficiation, and in particular relates to a novel grinding method for optimizing the flotation behavior of copper ore. Background technique [0002] Copper is one of the metal elements discovered and used by humans earlier. Due to its unique physical and chemical properties and metal properties, it has long been an indispensable metal resource in human production and daily life. With the rapid development of my country's social economy, the demand for copper resources has increased rapidly, but the reserves of copper resources in my country only account for 4.29% of the global reserves, and the dependence on the international market is increasing year by year. Moreover, with the continuous development and utilization of copper ore resources, copper ore resources are decreasing day by day. Therefore, in order to meet the demand for copper in my country's economic development, improve th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C17/10B02C17/20B02C17/18B02C23/36
CPCB02C17/10B02C17/18B02C17/20B02C23/36
Inventor 韩跃新张小龙李艳军高鹏
Owner NORTHEASTERN UNIV
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