Technique for improving solid content of raw pulp

A process method and slurry technology, applied in chemical instruments and methods, inorganic chemistry, alumina/aluminum hydroxide, etc., can solve problems such as unreachable, achieve the effects of reducing quantity, improving technical indicators, and saving engineering investment

Inactive Publication Date: 2008-04-23
GUIYANG AL-MG DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As the existing raw material grinding process is affected by the classifier, the solid content of raw ore pulp can only reach 250-300g / l at present, which cannot meet the requirements of 600-800g / l recommended in the test report

Method used

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  • Technique for improving solid content of raw pulp

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Effect test

Embodiment 1

[0016] Embodiment 1 of the present invention: In the process after hydrocyclone grading, a hydrocyclone concentration device is set; the specification of hydrocyclone is φ300~500; The raw ore pulp that comes out has a solid content of 250-300g / l and a pressure of 0.1-0.12MPa, and is sent to the additional hydrocyclone for concentration; the concentrated underflow raw ore pulp has a solid content of 600-800g / l, As the product of this process is sent to the normal pressure desiliconization process, the overflow after concentration by the hydrocyclone has a solid content of 100-150g / l, and the overflow returns to the intermediate pump pool for circular classification and concentration. Since the solid content of raw ore pulp is greatly increased, the number of subsequent atmospheric pressure desilication tanks can be appropriately reduced.

Embodiment 2

[0017] Embodiment 2 of the present invention: the raw ore pulp overflow product obtained in the existing hydrocyclone classifying unit (or spiral classifier) ​​of the raw material mill in the alumina factory, its solid content is 200~300g / l, enters the middle raw ore pulp tank, Use pumps and pipelines to send the materials in the intermediate raw ore slurry tank to one (group) or several (groups) hydrocyclone concentration devices (determine the number of units and groups according to the production scale), and the hydrocyclone concentration device feeds The pressure is 0.1-0.12MPa, the specification of the hydrocyclone is φ300-500, and the solid content of the concentrated underflow raw ore pulp reaches 600-800g / l. As the product of this process, it is sent to the normal pressure desiliconization process. The solid content of the fluid is 100-150g / l, and the overflow is returned to the intermediate pump pool for circulation classification and concentration.

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Abstract

The invention discloses a process for increasing solid content in ore pulp, wherein an ore pulp concentration installation is added to the water cyclone equipment into the conventional technique, the process comprises the following steps, feeding the crude ore pulp from the overflow port of the water cyclone equipment in the conventional raw material grinding step with a solid content of 250-300g / l into the added water cyclone equipment for concentration, the solid content in the concentrated ore pulp can reach 600-800g / l. As a normal atmosphere desiliconisation procedure, the overflow after concentration is returned into the middle pumping pond for circulation grading and condensing.

Description

Technical field: [0001] The invention relates to an alumina production process, which is used in the raw material grinding process of an alumina plant. Background technique: [0002] In the raw material grinding process of the Bayer Alumina Plant, bauxite, lime, and part of the circulating mother liquor are added to the raw material mill for grinding in a certain proportion, and the ore pulp after grinding is classified by a hydraulic cyclone or a spiral classifier. , the graded underflow is returned to the raw material mill for re-grinding as the returned sand, and the graded overflow is sent to the normal pressure desiliconization process of the dissolution workshop as the raw ore pulp for normal pressure desiliconization. [0003] For raw ore pulp classification using hydrocyclones, the solid content of the inlet hydrocyclone is 400-550g / l, the solid content of the underflow of the hydrocyclone is 800-1000g / l, and the solid content of the overflow is 250-300g / l. The soli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/02C01F7/0613
CPCC22B21/0007C01F7/0613
Inventor 陈德
Owner GUIYANG AL-MG DESIGN & RES INST
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