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Technological method of extracting aluminium silicon alloy from fly ash

A technology of aluminum-silicon alloy and process method, applied in the direction of improving process efficiency, etc., can solve problems such as shortage of aluminum-silicon alloy materials, difficulty in handling fly ash, high price, etc., and achieve the goal of saving ore resources and reducing sewage charges Effect

Inactive Publication Date: 2007-08-29
严瑞山
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the technical problem that fly ash is difficult to handle, the object of the present invention is to provide a method for extracting aluminum-silicon alloy from fly ash, by extracting aluminum-silicon alloy from fly ash. The second is to make the power plant have a new economic growth point, the third is to provide a new source of raw materials for aluminum-silicon alloys, and the fourth is to alleviate the material shortage and high prices of aluminum-silicon alloys in the automobile industry and aerospace industry situation

Method used

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specific Embodiment approach 2

[0023] 2 tons of fly ash, 0.4 tons of coke powder and bituminous coal, 0.5 tons of kaolin, and 0.15 tons of binder. After the low-temperature dryer is maintained and dried to a moisture content of ≤1%, it is sent to a blast furnace for smelting at a temperature of 1600°C-1800°C. After 4 hours, it is successively released, and 0.07 tons of sodium fluoroaluminate, sodium fluoride and chloride are added to the refining furnace. The refining agent composed of zinc is refined for 0.5 hours, then vacuum filtered to remove slag, cast ingots, and after cooling, it becomes an aluminum-silicon alloy containing 60.77% Al and 20.14% Si.

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Abstract

A process for extracting AlSi alloy from powdered coal ash includes such steps as proportionally mix powdered coal ash with reducing agent, coke powder, bitumite, bauxite and adhesive, stirring, rolling to become pellets, curing while drying, smelting in ore roaster at 1600-2200 deg.C for 4 hr, discharging, refining at 1400-1800 deg.C while adding refining agent, vacuum filtering, and casting. The content of Al and Si in finished ingot is more than 70%.

Description

Technical field: [0001] The invention relates to the technical field of directly extracting aluminum-silicon alloys using submerged arc furnaces or blast furnaces by using aluminum-silicon elements in fly ash, in particular to a process for extracting aluminum-silicon alloys from fly ash. Background technique: [0002] At present, a large amount of fly ash produced by coal-fired power plants is generally used to make hollow bricks, and most of them are buried as waste. The power plant has to pay an environmental protection waste disposal fee of 30 yuan per ton. For power plants It is said that this is not a small cost. What is more important is that the fly ash treatment will occupy a large area of ​​cultivated land. Originally, my country's land resources are very poor. Calculated according to the fly ash produced by all power plants in the country, the annual occupation of The arable land amounts to hundreds of thousands of mu, and even the international community has not so...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C21/02C22C1/00C22B7/04
CPCY02P10/20
Inventor 严瑞山曲万山
Owner 严瑞山