Method for preparing mullite from aluminum ash

A technology of mullite and aluminum ash, applied in the field of preparing mullite, can solve problems such as ecological environment hazards and accumulation, and achieve the effects of improving quality, improving resource recovery and reducing energy consumption

Active Publication Date: 2021-07-13
重庆丰淼生态环境科技有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the aluminum ash cannot be disposed of properly, it will accumulate in large quantities and cause great harm to the ecological environment.

Method used

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  • Method for preparing mullite from aluminum ash
  • Method for preparing mullite from aluminum ash
  • Method for preparing mullite from aluminum ash

Examples

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Embodiment 1

[0067] Embodiment 1 is the additive of doping 6wt%, embodiment 2 is the additive of doping 8wt%, embodiment 3 is the additive of doping 10wt%; Comparative example 1 is the additive of doping 0wt%, comparative example 2 is doping 2wt% of additives, comparative example 3 is doped with 4wt% of additives.

[0068] Example 1-Example 3 and Comparative Example 1-Comparative Example 3 all performed secondary sintering of aluminum ash according to the sintering step in the above method to form mullite. Comparative example 4 is the sintering method proposed in the document "Influence of additives on the crystal phase structure of mullite developed by aluminum plant industrial waste slag", using aluminum plant industrial waste slag and silica as raw materials, silica fume dust as a mineralizer, high temperature sintering reaction To prepare mullite, the temperature during sintering is 1480°C, and the temperature is kept for 5h. Comparative example 5 is the patent "Manufacturing method o...

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Abstract

The invention belongs to the technical field of preparation of mullite by using oxide as a base material, and discloses a method for preparing mullite by using aluminum ash. The method comprises the following steps: adding a heating agent into an aluminum ash raw material, and stir-frying the aluminum ash raw material and the heating agent, so that the aluminum ash raw material is in a high-temperature state, and aluminum elementary substances form an aluminum melt and are gradually collected; exporting and cooling the collected aluminum melt to form aluminum blocks, wherein secondary aluminum ash powder is left; adding silicon powder and an additive into the secondary aluminum ash powder, uniformly mixing to form a mixed material, and carrying out ball milling on the mixed material; and introducing the ball-milled mixed material into a rotary kiln, and sintering to generate mullite, wherein the used additive is a mixture of manganese dioxide and zinc oxide. According to the method for preparing mullite by using aluminum ash, provided by the invention, the aluminum ash can be subjected to harmless and resourceful treatment, so that the influence on the ecological environment is reduced, and meanwhile, resource reutilization is completed.

Description

technical field [0001] The invention belongs to the technical field of preparing mullite by using oxide as a base material, and in particular relates to a method for preparing mullite by using aluminum ash. Background technique [0002] Aluminum is an element second only to oxygen and silicon in the earth's crust, and is the most abundant metal element in the earth's crust. It is widely used in aviation, construction, automobiles and other fields. With the development and progress of society, the production and consumption of primary aluminum and aluminum materials in my country are on the rise. By 2017, my country's aluminum production has reached 58.32 million tons per year, and primary aluminum production has reached 36.3 million tons per year. year. In the process of producing primary aluminum and aluminum materials, aluminum ash will be produced. For every ton of primary aluminum produced, about 30-50kg of aluminum ash will be produced; for processing and utilization of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/185C04B35/622C22B7/00C22B21/00
CPCC04B35/185C04B35/622C04B35/62204C22B21/0069C04B2235/3418C04B2235/3272C04B2235/3267C04B2235/3284C04B2235/656C04B2235/6567C04B2235/6583Y02P10/20
Inventor 李利民王践
Owner 重庆丰淼生态环境科技有限责任公司
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