Coupling use method utilizing various industrial solid/dangerous wastes

A technology of industrial and waste cathode carbon blocks, which is applied in the direction of solid waste removal, chemical instruments and methods, aluminum compounds, etc., and can solve the problem of low comprehensive utilization efficiency of valuable components and difficulty in a large amount of consumption and recycling of various industrial wastes Use and other issues to achieve the effect of reducing weight, reducing energy consumption, and reducing production costs

Active Publication Date: 2021-04-02
UNIV OF SCI & TECH BEIJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a coupling method of utilizing various industrial solid / hazardous wastes, to solve the major common problem that the existing various industrial wastes are difficult to consume and utilize in large quantities, and to break through the traditional industrial solid waste treatment process The problem of low comprehensive utilization efficiency of middle and valuable components has broad industrial application prospects

Method used

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  • Coupling use method utilizing various industrial solid/dangerous wastes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] use as figure 1 In the method shown, the pre-desiliconized coal gangue ash, aluminum ash, red mud, spent cathode carbon block, carbide slag, and sodium-containing additives are uniformly mixed in a mass ratio of 34:6:10:4:23:23; the mixed Uniform raw meal is calcined at 1000°C for 30 minutes at high temperature. After the calcined clinker is dissolved, sodium aluminate solution and solid slag can be obtained. After analysis, the standard alumina dissolution rate of clinker is 92.2%, and the standard sodium oxide of clinker is 92.2%. The dissolution rate was 94.5%.

Embodiment 2

[0040] use as figure 1 In the method shown, the pre-desiliconized coal gangue ash, aluminum ash, red mud, spent cathode carbon block, carbide slag, and sodium-containing additives are uniformly mixed in a mass ratio of 29:5:9:3:33:21; the mixed Uniform raw meal is calcined at 1100°C for 60 minutes at high temperature. After the calcined clinker is dissolved, sodium aluminate solution and solid slag can be obtained. After analysis, the standard alumina dissolution rate of clinker is 92.5%, and the standard sodium oxide standard of clinker is 92.5%. The dissolution rate was 94.2%.

Embodiment 3

[0042] use as figure 1 In the method shown, the pre-desiliconized coal gangue ash, aluminum ash, red mud, spent cathode carbon block, carbide slag, and sodium-containing additives are uniformly mixed in a mass ratio of 24:6:8:4:39:19; the mixed The uniform raw meal is calcined at 1200°C for 90 minutes at a high temperature. After the calcined clinker is dissolved, sodium aluminate solution and solid slag can be obtained. After analysis, the standard alumina dissolution rate of the clinker is 93.1%, and the standard sodium oxide of the clinker is 93.1%. The dissolution rate was 94.8%.

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Abstract

The embodiment of the invention discloses a coupling use method utilizing various industrial solid/hazardous wastes, and belongs to the field of industrial solid waste resource utilization. The coupling use method comprises the following steps: firstly, selecting pre-desiliconized coal gangue ash, aluminum ash, red mud, waste cathode carbon blocks and carbide slag as raw materials, then adding oneor more of sodium hydroxide, sodium carbonate and sodium bicarbonate as additives to prepare a uniformly mixed raw material, then sintering the raw material at a high temperature to obtain clinker, and finally, dissolving out the clinker to obtain solid slag and sodium aluminate. According to the method disclosed by the invention, aluminum-containing and sodium-containing components in the raw material can be converted into sodium aluminate in a sintering process by utilizing a coupling use method of various industrial solid/dangerous wastes, the calcium-containing component is easy to separate after being combined with impurity silicon, the carbon-containing component provides part of heat required by sintering, and the iron-containing component reduces the temperature required by sintering; and the standard dissolution rate of alumina in the sintered clinker is greater than 92%, and the standard dissolution rate of sodium oxide is greater than 94%.

Description

technical field [0001] The invention belongs to the field of resource utilization of industrial solid waste, and in particular relates to a method for coupling utilization of various industrial solid / hazardous wastes. Background technique [0002] With the rapid development of my country's industry, a large amount of mineral raw materials are constantly being consumed, and a large amount of waste by-products are also produced. For example, a large amount of aluminum-silicon-containing solid waste coal gangue will be produced in the process of coal mining and washing, a large amount of alkali-containing solid waste red mud will be produced in the alumina production process, and carbon-containing hazardous waste will be produced in the aluminum electrolysis production process. Waste cathode carbon blocks, aluminum-containing hazardous waste aluminum ash, calcium-containing solid waste carbide slag produced in the process of acetylene gas preparation, etc. These industrial wast...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/06C01F7/08C01F7/14B09B3/00B09B5/00
CPCC01F7/0693C01F7/08C01F7/14B09B3/00B09B5/00B09B3/40
Inventor 刘风琴柯朝阳许志谦顾松青王志平谢明壮于国庆
Owner UNIV OF SCI & TECH BEIJING
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