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Ultralow-energy-consumption grinding technology for non-ferrous metal ore

A non-ferrous metal and process technology, applied in the field of ultra-low energy consumption grinding process, to achieve the effect of uniform particle size distribution, simple configuration and easy industrial production

Inactive Publication Date: 2019-01-04
JIANGXI UNIV OF SCI & TECH
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  • Abstract
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  • Claims
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Problems solved by technology

The common feature of these inventive methods is that high-pressure roller mills are used for fine crushing, and the disadvantage is that ball mills are used for subsequent grinding.

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  • Ultralow-energy-consumption grinding technology for non-ferrous metal ore

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] Taking the porphyry copper mine as an example, its Platts hardness coefficient is 12, and the ball milling work index is 16kwh / t. The method proceeds as follows:

[0020] (1) The particle size of the raw ore mined in the open pit and underground is -1000mm.

[0021] (2) The raw ore in step (1) is crushed by conventional coarse crushing, medium crushing and fine crushing processes. Among them, the coarse crushing and medium crushing are open-circuit crushing, and the fine crushing and sieve form a closed circuit, and the fine crushing product is controlled to be -12mm.

[0022] (3) Use a h...

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Abstract

The invention provides an ultralow-energy-consumption grinding technology for non-ferrous metal ore and belongs to the field of ore selection. The technology is mainly composed of grinding processes such as rough crushing, middle crushing, fine crushing, high-pressure rolling, stirring grinding and sand grinding. The technology aims at most non-ferrous metal ore with medium rigidity, and the totalenergy consumption of the ultralow-energy-consumption grinding technology can be controlled below 15 kwh / t; compared with a traditional three-segment one-closed-circuit ore crushing and two-segment full-closed-circuit ore grinding technology and a traditional rough crushing and SAB technology, the technology has the advantages that the total energy consumption is lowered by 30% or above, the operation technology is compact and low in cost, industrial production and allocation are easily achieved, and the technology is suitable for application and popularization.

Description

technical field [0001] The invention belongs to the field of mineral processing and relates to an ultra-low energy consumption grinding process for nonferrous metal ore. Background technique [0002] In the development process of non-ferrous metals, the particle size of the raw ore block extracted from the mining field can reach 1000-1500mm, while the selected particle size required by the beneficiation process is usually 0.1-0.2mm or even finer, and the crushing ratio is as high as 15000 times. Generally, it is necessary to set up grinding processes such as coarse crushing, medium crushing, fine crushing, coarse grinding, and fine grinding. The traditional coarse crushing, medium crushing, fine crushing and sieve form a three-stage closed-circuit crushing process, and the fine crushing product is generally -12mm; the coarse grinding, fine grinding, spiral classifier, and hydrocyclone form a closed-circuit grinding, and the final grinding Products can reach 0.1mm or even fi...

Claims

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Application Information

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IPC IPC(8): B02C21/00
CPCB02C21/00
Inventor 吴彩斌廖宁宁叶景胜袁程方
Owner JIANGXI UNIV OF SCI & TECH
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