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A method for processing aluminum resources by Bayer-red mud alkali solution series process

A technology of red mud and resources, which is applied in the field of Bayer-red mud alkali-dissolution series process to treat aluminum resources, can solve environmental hazards and other problems, achieve high recovery rate, low alkali consumption, and reduce pressure

Active Publication Date: 2020-10-20
SHENYANG POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the discharged red mud also contains a certain amount of alkali, which is still potentially harmful to the environment even if effective anti-seepage measures are taken.

Method used

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  • A method for processing aluminum resources by Bayer-red mud alkali solution series process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Such as figure 1 Shown, a kind of Bayer-red mud alkali-dissolution tandem process processes the method for aluminum resource, comprises the following steps:

[0068] The raw material used in this example is a diaspore type aluminum resource, and the main chemical composition is: Al 2 o 3 : 50%, SiO 2 : 19%, Fe 2 o 3 : 8.5%, TiO 2 : 2.3%. The ingredients of the raw materials can also use other components, which cannot be used to limit the protection scope of the present invention.

[0069] (1) Preparation of raw ore pulp: Take 1000g of bauxite with the above composition for crushing and grinding, and mix it with circulating lye and lime for grinding to prepare raw ore pulp, and grind it into granules with a particle size of -100 Mesh to -400 mesh;

[0070] (2) Dissolution: The qualified raw ore slurry is pumped into the dissolution system for dissolution. The dissolution temperature is 260°C and the dissolution time is 60 minutes to produce the dissolved ore slur...

Embodiment 2

[0086] Such as figure 1 Shown, a kind of Bayer-red mud alkali-dissolution tandem process processes the method for aluminum resource, comprises the following steps:

[0087] The raw materials used in this example are boehmite-type aluminum resources, and the chemical composition is: Al 2 o 3 : 44.8%, SiO 2 : 21.5%, Fe2 o 3 : 9.5%, TiO 2 : 0.8%. The ingredients of the raw materials can also use other components, which cannot be used to limit the protection scope of the present invention.

[0088] (1) Preparation of raw ore pulp: Take 1000g of bauxite with the above composition for crushing and grinding, and mix it with circulating lye and lime for grinding to prepare raw ore pulp, and grind it into granules with a particle size of -100 Mesh to -400 mesh;

[0089] (2) Dissolution: Send the qualified raw ore pulp into the dissolution system for dissolution. The dissolution temperature is 105°C and the dissolution time is 60 minutes to produce the dissolved ore pulp. The alu...

Embodiment 3

[0105] Such as figure 1 Shown, a kind of Bayer-red mud alkali-dissolution tandem process processes the method for aluminum resource, comprises the following steps:

[0106] The raw materials used in this example are boehmite-type and boehmite-type mixed aluminum resources, and the chemical composition is: Al 2 o 3 : 47.2%, SiO 2 : 3.9%, Fe 2 o 3 : 19.7%, TiO 2 : 2.3%. The ingredients of the raw materials can also use other components, which cannot be used to limit the protection scope of the present invention.

[0107] (1) Preparation of raw ore pulp: Take 1000g of bauxite with the above composition for crushing and grinding, and mix it with circulating lye and lime for grinding to prepare raw ore pulp, and grind it into granules with a particle size of -100 Mesh to -400 mesh;

[0108] (2) Dissolution: Send the qualified raw ore pulp into the dissolution system for dissolution. The dissolution temperature is 300°C and the dissolution time is 10 minutes to produce the d...

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Abstract

The invention relates to a method for utilizing aluminum resources and particularly relates to a method for treating aluminum resources by a Bayer-red mud alkali solution series process. The method mainly comprises: (1) preparation of raw ore pulp, (2) dissolution, (3) red mud separation and washing, (4) fine filtration, (5) seed decomposition, (6) aluminum hydroxide separation and washing, (7) alumina roasting, (8) mother liquor evaporation and lye preparation, (9) red mud iron selection, (10) sodium ferrite synthesis, (11) red mud pulp preparation, (12) red mud dissolution, (13) high iron product solid-liquid separation and washing, (14) secondary mother liquor preparation, (15) red mud leachate mixing and (16) circulating mother liquor evaporation and lye preparation. The method solvesthe problem that the red mud produced by the existing alumina industry cannot be effectively used so that great environmental pollution and waste of resources are produced. The method fully utilizes red mud, reduces the pressure on the environment and realizes the clean production in the alumina industry.

Description

technical field [0001] The invention relates to a method for utilizing aluminum resources, in particular to a method for processing aluminum resources through a Bayer-red mud alkali solution series process. Background technique [0002] Alumina industry is one of the basic raw material industries in my country. my country's alumina industry started in 1953 from the first alumina plant (Shandong Aluminum Plant) with a designed annual output of 35,000 tons. By 2017, the alumina production capacity exceeded 70 million tons, and the alumina output reached 69.02 million tons. Both production capacity and output rank first in the world. [0003] my country's proven bauxite resources rank sixth in the world, and the top five are: Guinea, Australia, India, Vietnam, and Brazil. The bauxite in my country is mainly diaspore type bauxite (accounting for more than 98%), and the bauxite in foreign countries is mostly gibbsite type bauxite, and some boehmite type bauxite Bauxite. Most of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F7/14C01G49/00
CPCC01F7/144C01G49/0018C01G49/0081
Inventor 李来时吴玉胜
Owner SHENYANG POLYTECHNIC UNIV