Bauxite grinding system equipment and grinding process

A kind of system equipment and bauxite technology, applied in the direction of grain processing, etc., can solve the problems of high energy consumption, low production capacity, coarsening of bauxite particles, etc., achieve low noise, increase production capacity, and reduce the amount of ore entering the grinding Effect

Inactive Publication Date: 2013-06-05
GUIYANG AL-MG DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a bauxite grinding system equipment and a grinding process using the system equipment, the system equipment and the grinding process can further refine the bauxite particles entering the raw material mill unit , improve the production capacity of the raw material mill unit, and reduce the energy consumption of the entire slurry preparation system, so as to overcome the problems of coarse bauxite particles, low production capacity and high energy consumption in the existing technology

Method used

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  • Bauxite grinding system equipment and grinding process
  • Bauxite grinding system equipment and grinding process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: The equipment of the bauxite grinding system is as follows: the high-level feeding bin 1 is connected to the high-pressure roller mill 2, the high-pressure roller mill 2 is connected to the distributor 7, and the edge material outlet of the material distributor 7 is connected to the edge material circulation System 3 is connected. The side material circulation system 3 includes a side material cutting machine and a bucket elevator, and the bucket elevator is connected with the high-level feeding bin 1 .

[0021] The grinding process using bauxite grinding system equipment is (see attached figure 1 . ), after the crushing section and before the raw material grinding section in the traditional pulp preparation system, an ore pre-grinding process with high-pressure roller mill as the main equipment is added. The specific process of the pre-grinding section is as follows: the crushed ore is sent to the high-level feeding bin 1 above the high-pressure roller ...

Embodiment 2

[0022] Embodiment 2: Bauxite grinding system equipment On the basis of Embodiment 1, there is also: the middle material outlet of the distributor 7 is connected with the ore classification system 4, the ore classification system 4 is connected with the finished pulp tank 5, and the finished pulp is The tank 5 is connected with the finished pulp pump 6 .

[0023] The grinding process of the bauxite grinding system equipment is as follows: the crushed ore enters the high-level feeding silo 1 through the bucket elevator, and after a short storage in the silo, the ore enters the high-pressure roller mill 2 evenly for rolling, The rolled "side material" is sent to the hopper elevator through the side material circulation system 3 and then enters the high-pressure roller press 1 for rolling; the rolled "middle material" enters the ore classification system 4 for classification. This system screens out the qualified ore from the raw ore pulp that can be directly prepared in the "inte...

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Abstract

The invention discloses bauxite grinding system equipment and a grinding process. According to the bauxite grinding system equipment, a high-position feeding bin (1) is connected with a high-pressure roller mill (2) which is connected with a distributor (7), and a rim material outlet of the distributor (7) is connected with a rim material circulating system (3). The rim material circulating system (3) comprises a rim material cutting machine and a bucket type lifter which is connected with the high-position feeding bin (1). The pre-grinding technological process in which the high-pressure roller mill is used as main equipment is added into a bauxite pulp preparing system, ore granularity after roller milling is lowered, and meanwhile an ore grading system is added, and parts of ores after roller milling are directly used for preparing qualified ore pulp. The bauxite grinding system equipment and the grinding process have the advantages that the Bond work index of the ores after roller milling is lowered, so that energy consumption of the whole ore pulp preparing system is lowered, more crushing and less grinding are achieved, the granularity of the ground ores is lowered, and accordingly the capacity of a grinding machine set can be improved.

Description

technical field [0001] The invention relates to a bauxite grinding section equipment and a grinding process in alumina production. Background technique [0002] The bauxite slurry preparation system is one of the important links in the alumina production process, and the energy consumption of this system accounts for a considerable proportion of the production energy consumption of the whole plant. At present, the basic process of ore crushing and grinding is: first-stage crushing → second-stage crushing → third-stage crushing → aluminum ore homogenization → raw material grinding. "Primary crushing (coarse crushing)" is located in the mine, and the ore particle size after crushing is usually 200mm; (fine crushing)" is located in the mine or alumina plant, and the particle size of the crushed ore is 15-25mm. The crushed ore enters the homogenization yard for stockpiling and homogenization, and then is sent to the "raw material mill" section to be ground into qualified ore p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C4/02B02C23/08
Inventor 李荣华刘希泉杨小平
Owner GUIYANG AL-MG DESIGN & RES INST
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