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Grinding method for pipelining slurry in manufacturing process of aluminium oxide

A pipeline and alumina technology, which is applied in the fields of alumina/hydroxide, grain processing, etc., can solve the problems of large constraints and many equipment in the process link, and achieve the promotion of cost reduction, optimization of pulp fineness, and convenient operation and maintenance Effect

Inactive Publication Date: 2009-11-18
GUIZHOU BRANCH CHINA ALUMINUM IND
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Problems solved by technology

This process takes advantage of the large crushing capacity of the first-stage rod mill and the good grinding performance of the second-stage ball mill. Compared with the one-stage grinding process, the grinding efficiency is greatly improved. There is a problem with the table mill, and the whole process will be interrupted

Method used

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  • Grinding method for pipelining slurry in manufacturing process of aluminium oxide

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Embodiment

[0017] The specification of the three-chamber tube mill is φ3.2×12m, and the production capacity is 90t / h. The effective lengths of the three warehouses are 3m, 3m, and 5m respectively. Warehouse steel forging 60 tons. Add bauxite and lime to the three-chamber forced discharge tube mill through the grinding head bin and electronic belt scale in proportion, and mix a certain amount of mixed mother liquor into the mill. According to the different characteristics of bauxite, the amount of lime added is usually 9.5-12.5% ​​of the weight of bauxite, and the amount of mixed mother liquor fed into the mill is controlled by the L / S in the mill in the range of 0.4-0.8. Calculated according to the ore load of the mill at 90t / h, the amount of lime to be added is 8.6-11.3t / h, and the amount of mixed masterbatch added to the mill is 26-53m 2 / h, according to the required solid content of the finished pulp is 300g / l, and the amount of mixed masterbatch that needs to be added at the dischar...

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Abstract

A grinding method of pipelining slurry in the manufacturing process of the aluminium oxide relates to the slurry grinding method in the manufacturing process of the aluminium oxide, which is characterized in that the grinding process adopts a three-bin strong drainage type tuber grinder to grind the ore; a cylinder screen is externally arranged at the discharge end of the grinder for one-time screen separation; a hydraulic cyclone is adopted for grading to constitute a closed circuit grinding process flow. On the basis of the current grinding techniques, the method of the invention takes up respective advantages, thus effectively simplifying the grind grading process flow, reducing grinding energy consumption and further optimizing the grinding fineness index, the invention further has the advantage of easy operation and management.

Description

technical field [0001] The invention relates to a method for grinding pipelined pulp in alumina production, which relates to the pulp grinding process technology in the alumina production process. Background technique [0002] The preparation of pipelined pulp is an important process link in alumina production, and plays a pivotal role in the entire alumina production process. The grinding degree and pass rate of pipelined pulp directly affect the technical indicators and dissolution rate of pipelined dissolution process. The service life of the device. [0003] At present, there are two main pulp preparation processes in the alumina production process: [0004] (1) A closed-circuit grinding process composed of a ball mill, a spiral classifier, and a hydrocyclone. The technical characteristics of this process are: a closed-circuit grinding process composed of a ball mill, a spiral classifier, and a hydrocyclone for two classifications. The earth ore, lime and mixed mother ...

Claims

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Application Information

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IPC IPC(8): B02C17/00B02C23/08B02C17/06B02C17/22B02C17/20C01F7/02
Inventor 黑明张春华秦天长王英杰王鹏
Owner GUIZHOU BRANCH CHINA ALUMINUM IND
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