Autogenous mill stubborn stone bypass high-pressure roller grinding process

A high-pressure roller mill and autogenous mill technology, applied in the direction of solid separation, filter screen, grid, etc., can solve the problems of low work efficiency and difficult stone treatment, so as to improve processing efficiency, improve screening ability, and avoid clogging. Effect

Inactive Publication Date: 2020-02-21
马钢集团设计研究院有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of difficult stone treatment and low work efficiency in existing autogenous mills, the present invention provides a high-pressure roller grinding process for self-grinding machine stubborn stones bypass

Method used

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  • Autogenous mill stubborn stone bypass high-pressure roller grinding process
  • Autogenous mill stubborn stone bypass high-pressure roller grinding process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A kind of autogenous mill stubborn stone bypass high-pressure roller mill process of the present embodiment uses a high-pressure roller mill system, such as figure 1 As shown, the high-pressure roller mill system includes a feed conveyor belt 1, an autogenous mill 2, and a sieve hopper 4, and is characterized in that: it also includes a cylinder sieve 3, a sieve hopper 5, a return conveyor belt 6 and a crushing Device 7, the end of described feed conveyer belt 1 is positioned at above the feed inlet of autogenous mill 2; An upper screen funnel 4 is arranged directly below, and an under-screen funnel 5 is arranged below the discharge end of the cylindrical sieve 3; the head end of the return conveyor belt 6 is located below the under-screen funnel 5, and The end is located above the feed inlet of the crushing device 7, and its process steps are as follows:

[0038] Step 1. The ore discharge product of the autogenous mill 2 enters the cylinder screen 3: the cylinder scre...

Embodiment 2

[0042] A kind of autogenous mill stubborn stone bypass high-pressure roller mill process of the present embodiment, its basic structure of the high-pressure roller mill system used is the same as that of embodiment 1, the differences and improvements are as follows: figure 2 As shown, the cylindrical sieve 3 includes a connecting plate 31, a first-stage sieve 32, a second-stage sieve 33, a supporting cylinder 35, a first-stage sieve discharge port 36, a second-stage sieve discharge port 37, a support ring 38, and a feed port 39 and the fixed plate 30, from the axis of the cylindrical screen 3 from the inside to the outside, followed by the support cylinder 35, the first stage sieve 32 and the second stage sieve 33, the support cylinder 35, the first stage sieve 32 and the second stage sieve 33 are located on the connecting plate 31 and the fixed plate 30, the feeding port 39 is located on the connecting plate 31, the opening of the feeding port 39 is located between the suppor...

Embodiment 3

[0044] In this embodiment, a kind of autogenous mill obstinate bypass high-pressure roller mill process, the basic structure of the high-pressure roller mill system used is the same as that of embodiment 2, the difference and improvement are: the first-stage sieve 32 and the second-stage sieve 33 All have sieve holes, and the sieve hole diameter on the second-stage sieve 33 is smaller than the sieve hole diameter on the first-stage sieve 32, and the sieve hole diameter of the second-stage sieve 33 is 3-8 mm, so that only the ore that is qualified to be ground can enter the lower sieve. One-stage treatment process; the hole diameter of the first-stage sieve 32 is 12-18mm, which ensures that larger ores and stubborn stones can pass through the cylindrical sieve 3, and prevents larger ores or stubborn stones from being blocked in the cylindrical sieve 3. Compared with Simple autogenous mill 2 grinding, the output of qualified ore in this embodiment has increased by 30%, and the co...

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Abstract

The invention discloses an autogenous mill stubborn stone bypass high-pressure roller grinding process, and relates to the technical field of stubborn stone crushing. The process is used for solving the problem that the stubborn stone crushing efficiency of an autogenous mill is low. A high-pressure roller grinding system comprises a feeding conveying belt, the autogenous mill and an oversize funnel, and further comprises a cylindrical screen, an undersize funnel, a material returning conveying belt and a crushing device, undersize products enter the next section through the undersize funnel,oversize products are fed into the autogenous mill through a high-pressure roller mill feed belt type conveyor below the products, and stubborn stone in the autogenous mill is recycled and crushed, sothat the working efficiency of the autogenous mill is improved. The process mainly considers the raw ore grade, the raw ore magnetic rate and the screening granularity, so that the results that the higher the magnetic rate is, the larger the tailing discarding amount is, and the lower the original ore grade is, the larger the tailing discarding amount is, and the smaller the screening granularityis, the larger the tailing discarding amount is are obtained.

Description

technical field [0001] The invention relates to the technical field of crushing pebbles, more specifically to a high-pressure roller mill process with bypass of self-grinding pebbles. Background technique [0002] In the ore crushing link, the autogenous mill crushes the ore by impacting and grinding each other, and the autogenous mill crushes relatively large. Using the autogenous mill can reduce medium and fine crushing operations, and the coarsely crushed products are directly fed into the autogenous mill, which simplifies the process flow, occupies a small area, and requires less capital investment; compared with the ball mill, the autogenous mill does not need to add steel balls, saving steel ball consumption . When the self-grinding machine grinds ore, due to the uneven feed particle size, it is easy to form a kind of obstinate stone that is too light as a grinding medium and unqualified as a grinding product in the autogenous mill. Grinding, so the stubborn stone ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C23/12B07B1/24B07B1/46B02C4/02B02C4/28
CPCB02C4/02B02C4/286B02C23/12B07B1/24B07B1/4609
Inventor 孙业长姚卫红金振科邓秀兰
Owner 马钢集团设计研究院有限责任公司
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