Filtering purifying method and device for light alloy melt heavy infiltration solid inclusions

Abstract

A filtering purifying method and device for light alloy melt heavy infiltration solid inclusions. The device comprises a crucible, a partitioning plate in the crucible, a support frame, and a filtering pore plate; a crucible molten pool is partitioned into a pre-treatment chamber, a filtering chamber, and a post-treatment chamber; the filtering pore plate in the filtering chamber inclines in the post-treatment chamber direction and is placed on the sealed support frame, and an included angle between the filtering pore plate and the crucible molten pool surface is more than 0 degree and less than 90 degrees. Light alloy melt from the pre-treatment chamber flows through the filtering chamber from bottom to top at a low speed; heavy infiltration solid inclusions in the light alloy melt are blocked by the filtering pore plate to be below the filtering pore plate so as to realize the purification of the melt solid inclusions; the inclusions accumulated below the filtering pore plate aggregate and fall with the increase of the accumulating amount, and thus self-purification of the filtering pore plate is realized. The filtering method solves the problem of filtering efficiency attenuation for filtering media caused by obstruction of filtering pores by solid inclusions in metal melt filtering and purification, enables the purification process to run continuously, and reduces the purification maintenance cost and workload.

Description

technical field [0001] The invention relates to a method and device for filtering and purifying solid impurities infiltrated by light alloy melt, and belongs to the field of light metal smelting and processing. technical background [0002] In recent years, light alloy materials have received more and more attention and application, but the existence of inclusions in light alloys will reduce the strength, plasticity and corrosion resistance of materials. In order to reduce inclusions in light alloys, a variety of light alloy 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 "...

AI Technical Summary

Problems solved by technology

Therefore, after using a pure magnesia foam ceramic filter to filter a light alloy melt for a period of time, the internal filter channel will be blocked by the 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. Larger, causing the liquid level of the light alloy molten pool at the entrance to rise, and severe cases will cause the light alloy melt to overflow from the crucible (1); due to the particularity of the pure magnesia foam ceramic structure, no matter how it is filtered, The impurity particles inside the filter media 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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