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Two-section series high-pressure roller milling-stirring milling short-process grinding system and method

A high-pressure roller mill and high-pressure roller mill technology, which is applied in the field of mineral processing, can solve the problems of unstable pulverized product indicators and complex processes, and achieve the effects of reducing grinding energy consumption and medium consumption, high energy consumption, and sufficient development.

Pending Publication Date: 2021-07-13
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantage is that the process is more complicated, and the crushed product index is unstable.

Method used

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  • Two-section series high-pressure roller milling-stirring milling short-process grinding system and method
  • Two-section series high-pressure roller milling-stirring milling short-process grinding system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A two-stage series high-pressure roller mill-stirring mill short-process crushing system, its structure diagram is shown in figure 1, including one section of high pressure roller mill 1, one section of vibrating screen 2, two sections of high pressure roller mill 3, two section of vibrating screen 4, stirring mill 5 and classification equipment 6 (the classification equipment of this embodiment is a hydrocyclone), one section The material outlet of the high-pressure roller mill 1 is connected with the first-stage vibrating screen 2, the over-screen material outlet of the first-stage vibrating screen 2 is connected with the over-screen material inlet of the first-stage high-pressure roller mill 1, and the under-screen material outlet of the first-stage vibrating screen 2 is connected with the second-stage The material inlet of the high-pressure roller mill 3 is connected, the material outlet of the second-stage high-pressure roller mill 3 is connected with the second-sta...

Embodiment 2

[0042] Using the two-stage series high-pressure roller mill-stirring mill short-process crushing system of Example 1, the two-stage series-connected high-pressure roller mill-stirring mill short-process crushing method is the same as that of Example 1, the difference is that:

[0043] (1) The finely crushed mineral particle size is -12mm copper ore sample; the sieve size of the first section of the vibrating screen is 5mm, the mass concentration of the agitated mill is 60%, the volume filling rate of the agitated mill is 70%, the material-to-ball ratio is 0.7, ceramic The diameter of the ball is 6mm, and the grinding time is 3min.

[0044] (2) After the agitated grinding ore product is classified by the hydrocyclone, the concentration of the mineral content in the overflow product is 35%, and the concentration of the mineral content in the settling sand is 65%. The grit-set product is transported to the stirring mill again for grinding operation. The mineral content of -0.074m...

Embodiment 3

[0046] Using the two-stage series high-pressure roller mill-stirring mill short-process crushing system of Example 1, the two-stage series-connected high-pressure roller mill-stirring mill short-process crushing method is the same as that of Example 1, the difference is that:

[0047] (1) The finely crushed mineral particle size is -12mm gold ore sample; the sieve size of the first section of the vibrating screen is 4mm, the mass concentration of the agitated mill is 70%, the volume filling rate of the agitated mill is 75%, the material-to-ball ratio is 0.85, ceramic balls The diameter is 10mm, and the grinding time is 4.5min.

[0048] (2) After the agitated grinding ore product is classified by the hydrocyclone, the concentration of the mineral content in the overflow product is 38%, and the concentration of the mineral content in the settling sand is 62%. Grit products are sent to the stirring mill again for grinding operation. The mineral content of -0.045mm in the overflow...

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Abstract

The invention discloses a two-section series high-pressure roller milling-stirring milling short-process grinding system and method, and belongs to the field of mineral processing. According to the two-section series high-pressure roller milling-stirring milling short-process grinding system, a first-section high-pressure roller mill is communicated with a first-section vibrating screen, an undersize material outlet of the first-section vibrating screen is communicated with a second-section high-pressure roller mill, the second-section high-pressure roller mill is communicated with a second-section vibrating screen, and an undersize material outlet of the second-section vibrating screen is communicated with a stirring mill; and the stirring mill is connected with a grading device. According to the method, materials crushed and screened by the first-section high-pressure roller mill are crushed by the second-section high-pressure roller mill, and then ore grinding operation is conducted through the stirring mill, so that ball milling operation with high energy consumption and low ore grinding efficiency in a traditional process is omitted, and the energy-saving advantages of the high-pressure roller mill and the stirring mill are fully exerted. The grinding process can be simplified, and meanwhile the grinding efficiency and the treatment capacity can be greatly improved, the ore grinding dissociation effect of the stirring mill is enhanced, the economic benefits of enterprises can be improved, and large-scale industrial operation of the high-pressure roller mill is facilitated.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a two-stage high-pressure roller mill-stirring mill short-process crushing system and a method thereof. Background technique [0002] The crushing and grinding operation is the preparatory operation before sorting. Its task is to provide the selected materials with qualified particle size for the mineral processing operation. The standard for judging the qualified particle size of the selected materials is that the useful minerals in the ore must achieve sufficient monomer dissociation, and after crushing, they must As slight as possible to facilitate subsequent sorting operations. Ore crushing and grinding is the operation with the highest energy consumption in the process of mineral resources processing and utilization, especially when performing ultra-fine grinding operations, the energy consumption of traditional horizontal ball mills increases exponent...

Claims

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Application Information

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IPC IPC(8): B02C21/00B02C23/14
CPCB02C21/005B02C23/14
Inventor 韩跃新李艳军秦永红高鹏余建文
Owner NORTHEASTERN UNIV
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