Filtering method and device for magnesium melt

Abstract

A method and apparatus for filtering magnesia fused mass is disclosed. The apparatus comprises a crucible, a partition fixed in the crucible, a pretreatment chamber comprising the crucibleand the partition; is characterized in that there is provided with a filter unit airproofed and fixed in the crucible between the partition and the delivery end of magnesia fused mass, a sediment chamber of magnesia fused mass is between the filter unit and the partition, and forms a subsequence treatment chamber for filtering the subsequence magnesia fused mass with the delivery end of magnesia fused mass; the filter unit comprises a filter orifice plate, which inclines the subsequence treatment chamber and is mounted on the support with an included angle of 0-90 DEG with the surface of crucible, and a support frame, the front-to-back terminals and bottom of which are respectively airproofed and fixed on the front-to-back inner wall and bottom of the crucible. The purification of magnesia fused mass is performed in case that magnesia fused mass from the pretreatment chamber may pass through the filter unit airproofed and fixed in the crucible from bottom to top at low speed. The block can be eliminated in the filter of magnesia fused mass at present because the filter orifice plate can be self-purified in use, accordingly the labor productivity is improved greatly.

Description

technical field [0001] The invention relates to a magnesium melt filtering method and a device thereof, and belongs to the field of light metal smelting and processing thereof. technical background [0002] In recent years, magnesium alloy materials have received more and more attention and application, but the presence of inclusions in magnesium alloys will reduce the strength, plasticity and corrosion resistance of the material. In order to reduce inclusions in magnesium alloys, a variety of magnesium melt purification methods have been developed, such as flux method, static method, flotation method and filtration method, among which filtration method is recognized as the most effective. [0003] By document retrieval, obtain following document and the present invention is the closest: [0004] Document 1: "Research on the Application of Foam Ceramic Filtration Technology in the Production of High Standard Magnesium Alloy Castings" was published in "Special Casting and No...

AI Technical Summary

Problems solved by technology

Therefore, after using pure magnesia foam ceramic filter to filter magnesium melt for a period of time, the internal filter channel will be blocked by impurity particles retained by the filter, which not only reduces the filter efficiency, but also rapidly increases the pressure at both ends of the filter inlet and outlet , causing the liquid level of the magnesium molten pool at the inlet to rise, and severe cases will cause the magnesium melt to overflow from the crucible; due to the particularity of the structure of pure magnesia foam ceramics, no matter how it is filtered, the impurities accumulated in the filter medium will Particles are difficult to fall off from the foam ceramics by themselves

Therefore, in order to maintain the refining capacity, the filter medium must be replaced regularly; in addition to increasing the cost, the brittle ceramic foam filter is easily damaged during the replacement operation

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