Preparation method of scouring agent for aluminum and aluminum alloy

Abstract

The invention relates to a preparation method of a scouring agent for aluminum and an aluminum alloy, which comprises the following steps: firstly, selecting ingredients according to the following percentages by weight: 30-85% of NaCl, 5-40% of Na2SiF6, 5-40% of Na2SO4, 2-20% of CaF2 and 0.5-10% of C6Cl6; uniformly mixing and fully stirring the selected ingredients; placing the mixture into a crucible, carrying out overheat melting to eliminate crystal water, and preserving the temperature for 30-60 minutes; and finally, processing after cooling to obtain the scouring agent. The method has the advantages of simple process and low cost. The prepared scouring agent does not contain sylvite, so that sylvite can not be introduced into the scouring and purifying treatment procedures, and therefore, an aluminum electrolysis cell can not be seriously corroded as a result of the introduction of sylvite when aluminum ash is directly recycled in the cell.

Description

1. Technical field [0001] The invention belongs to the field of metallurgy and relates to a preparation method of a refining agent for aluminum and aluminum alloys. 2. Background technology [0002] Aluminum liquid or aluminum alloy liquid will inevitably absorb and carry gas and produce inclusions during electrolysis, smelting and transfer, which will reduce the purity of aluminum liquid or aluminum alloy liquid and affect the quality. Therefore, it is necessary to refine and purify aluminum liquid and aluminum alloy liquid to remove these gases and inclusions, improve the quality of aluminum liquid or aluminum alloy liquid, and add refining agent to aluminum liquid or aluminum alloy liquid for refining and purification treatment is a commonly used measure. Some wastes will be produced during the refining process, commonly known as "aluminum ash", and more than 80% of the aluminum ash is metallic aluminum and alumina. At present, the traditional processing method of alumi...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a refining agent for aluminum and aluminum alloys, and the refining agent does not contain potassium salt, which is applied to the refining of aluminum and aluminum alloys, and solves the problem of refining and purification of existing refining agents. In the process of aluminum and aluminum alloy, because the aluminum ash produced by it contains potassium salt and seriously corrodes the aluminum electrolytic cell, the problem that the aluminum ash cannot be returned to the cell for utilization