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Efficient utilization process of aluminum ash in electrolytic aluminum plant

An aluminum ash and aluminum plant technology, which is applied in the field of high-efficiency utilization of aluminum ash in electrolytic aluminum plants to achieve the effects of avoiding pollution, realizing harmless transfer, and reducing steelmaking costs.

Active Publication Date: 2017-10-13
王强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] According to the description of these documents, it can be seen that the application of aluminum ash in the electrolytic aluminum plant in the middle of the steelmaking process has not yet had a process method that can eliminate its potentially harmful elements.

Method used

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Examples

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Embodiment Construction

[0032] Below in conjunction with embodiment the invention is further described.

[0033] Embodiment, take the production of a 120 ton LF refining furnace as an example:

[0034] 1) Purchasing the aluminum ash produced by the local electrolytic aluminum plant (the Al 2 o 3 content of 80%) 600Kg, and purchase 300kg of local limestone with a CaO content of 52%, and purchase 100kg of graphite carbon with a carbon content of 85%.

[0035] 2) Crush the limestone and graphite, and then grind them to less than 1mm in the middle of the Raymond mill, then mix them with aluminum ash, mix them evenly, add them to a high-pressure ball press machine, press them into balls, and then transport them to the converter for discharge The steel work station is ready for use.

[0036] 3) To replace the deoxidizer during LF smelting, add 0.8-3kg of slag balls per ton of steel, and use it according to the traditional steelmaking process.

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Abstract

The invention discloses an efficient utilization process of aluminum ash in an electrolytic aluminum plant. Limestone powder and graphite carbon are added into white aluminum ash in the electrolytic aluminum plant and pressed to form spheres for the LF refining process; the weight percentage contents of three components are respectively aluminum ash of 60%, limestone powder of 30% and graphite carbon of 10%; limestone and graphite are crushed, are finely grinded in a Raymond mill to reach the particle size below 1 mm, are mixed with the aluminum ash for uniform mixing, and are added in a high-pressure ball press to be pressed to form slag balls; the slag balls are transferred to a converter tapping station for future use; a deoxidizing agent is replaced during LF smelting; 0.8-3 kg of slag balls are added in each ton of steel; and a traditional steel refining process is operated.

Description

technical field [0001] The invention relates to an industry cross-innovation process for the rational application of white aluminum ash produced in the electrolytic aluminum production process in the steelmaking production process, in particular to a high-efficiency utilization process for the aluminum ash in an electrolytic aluminum plant. Background technique [0002] Aluminum production enterprises and iron and steel production enterprises are both pillar industries and strategic industries of the national economy. Aluminum ash is an inevitable by-product of the aluminum industry. Its composition is complex, containing a large amount of metallic aluminum, molten salt mixture, alumina, alloys and other components. In the process of producing aluminum by molten salt electrolysis of alumina, a certain amount of aluminum ash will be produced due to the carrying of operation and measurement equipment, anode replacement, aluminum tapping, ingot casting and electrolytic cell ove...

Claims

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Application Information

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IPC IPC(8): C21C7/06
CPCC21C7/06Y02P10/20
Inventor 王强
Owner 王强
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