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A crushing method for bauxite waste slag high-pressure roller mill

A high-pressure roller mill and high-pressure roller mill technology, applied in grain processing and other directions, can solve the problems of low production efficiency, inability to meet production needs, and low total output ratio.

Active Publication Date: 2017-10-03
HENAN DONGDA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a method for crushing bauxite waste slag by high-pressure roller mill, which can effectively solve the problem of bauxite waste slag being processed by GM800-400 high-pressure roller mill. The amount of material with a particle size ≤ 3 mm accounts for a small proportion of the total output, and the production efficiency is low, which cannot meet the needs of subsequent production.

Method used

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  • A crushing method for bauxite waste slag high-pressure roller mill

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Adjust the gap between the high-pressure roller mill movable roller 6 and the fixed roller 5 of the high-pressure roller mill 13 to be 10mm; the hydraulic system working pressure of the high-pressure roller mill is 16MPa; The height of the warehouse 3 before grinding is controlled at 8300mm; Open the bucket lift 11 of the fine material, start the motor of the hydraulic station 7 of the high pressure roller mill, and the oil pressure reaches 16Mpa; Start the motor of the thin oil station 8 of the high pressure roller mill for 20 seconds , and then start the main motor of the high-pressure roller mill 13; open the rod valve 4, start the bucket lifter 2 for entering the pre-grinding bin; open the belt 14; The bauxite slag 1 with the alumina weight content / silicon dioxide weight content ratio of 2.7 is introduced into the belt 14, and the feeding rate is 72t / h, and the belt conveys the bauxite slag into the feed of the bucket elevator 2 used in the pre-grinding silo. The di...

Embodiment 2

[0011] Adjust the gap between the movable roller and the fixed roller of the high-pressure roller mill to 11mm; the working pressure of the hydraulic system of the high-pressure roller mill is 17MPa; the upper inlet of the high-pressure roller mill is equipped with a pre-grinding warehouse, and the pre-grinding warehouse The height of the storage position is controlled at 8000mm; open the bucket lift of the fine material, start the motor of the hydraulic station 7 of the high pressure roller mill, the oil pressure reaches 17Mpa; start the motor of the thin oil station of the high pressure roller mill for 20 seconds, and then start the high pressure roller mill The main motor of the machine; open the rod valve, start the bucket lift used in the front bin of the grinding; open the belt; the particle size is ≤ 25mm, the water weight content is 5.5%, the alumina weight content is 55±3%, the alumina weight content / dioxide The bauxite waste slag with a silicon weight content ratio ...

Embodiment 3

[0013] Adjust the gap between the movable roller and the fixed roller of the high-pressure roller mill to 10mm; the working pressure of the hydraulic system of the high-pressure roller mill is 15MPa; the upper inlet of the high-pressure roller mill is equipped with a pre-grinding warehouse, and the pre-grinding warehouse The height of the bin is controlled at 7500 mm; open the bucket lift of the fine material, start the motor of the hydraulic station 7 of the high pressure roller mill, the oil pressure reaches 15Mpa; start the motor of the thin oil station of the high pressure roller mill for 20 seconds, and then start the high pressure roller The main motor of the mill; open the rod valve, start the bucket lift used for entering the mill front bin; open the belt; the particle size is ≤ 25mm, the moisture content is 4.8%, the alumina weight content is 55±3%, and the alumina weight content / 2 The bauxite slag with a weight content ratio of silicon oxide of 2.7±0.3 is introduced...

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Abstract

The invention relates to a crushing method of high-pressure roller mills for bauxite waste slag, which effectively solves the problem of low output particle size ≤ 3 mm and low production efficiency. The gap between the movable roller and the fixed roller of the high-pressure roller mill is adjusted, and the hydraulic System working pressure, adjust the bin height of the pre-grinding bin; open the bucket elevator for fine material, the motor of the hydraulic station, the motor of the thin oil station, the main motor, the rod valve and the bucket elevator for entering the warehouse; guide the bauxite waste slag into the belt , enter the bucket elevator for entering the warehouse, and the outlet of the bucket elevator for entering the warehouse is placed in the upper mouth of the pre-mill warehouse. After the outlet of the high-pressure roller mill starts to discharge, take samples from the sampling port of the outlet chute , divided twice by the quartering method, weighed on the balance, the mass is m, and the unit is g; sieved with a standard analytical sieve, the mass of the sample is weighed, the mass is m1, and the unit is g, calculation: output The percentage content of particle size ≤ 3 mm = m1 / m × 100%. The method of the invention is simple, easy to operate, good in effect, accurate, stable and reliable.

Description

technical field [0001] The invention relates to a grinding method for high-pressure roller grinding of bauxite waste slag. Background technique [0002] The working principle of the high-pressure roller mill: mainly rely on two horizontally installed and synchronously rotating squeezing rollers to pulverize and grind the high-pressure material layer. In the process of being forced to move downward, the pressing force of the closed material layer gradually increases to a sufficient degree until it is crushed and squeezed into a dense cake and discharged from the machine. The mechanical strength of this kind of cake is very low, and it will be broken when you twist it by hand. Even the slightly larger particles will also have micro-cracks inside, which will greatly reduce the strength, which is extremely beneficial for further grinding. It can be said that the high-pressure roller mill plays a role in crushing and The double action of grinding. [0003] At present, the indus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B02C4/02B02C4/32B02C4/28
Inventor 王秀峰李民菁李少帅张松茂李新华
Owner HENAN DONGDA TECH CO LTD