Filter for purifying smelting molten steel

Abstract

The invention belongs to the technical field of high-temperature alloy, and in particular relates to a filter for purifying molten steel, which consists of an upper layer of filter screen, a lower layer of filter screen, and a solid ceramic ball layer in the middle of two layers of the filter screens. The filter is pre-placed at a shell-shaped cap opening of an ingot mould or a cast element; when the molten steel flows through the filter, the molten steel flows through a first layer of the filter screen, and large impurities in the molten steel are filtered; then the molten steel enters into a ceramic ball, and small impurities in the molten steel are adsorbed; and finally the molten steel flows through a second layer of the filter screen the aperture of which is flexural and fine, the small impurities in the molten steel are further adsorbed, and the purified molten steel is finally obtained. The filter can solve the problems of low filtration efficiency and difficult reutilization of high-temperature alloy returning materials in the prior filter for purifying and melting the molten steel of the high-temperature alloy, and improves filtration effect greatly compared with the prior filter method; the filtration efficiency can reach more than 70 percent; and according to difference of materials used for the filter screens and the ceramic ball, the filter can be widely applied to producing purified high-temperature alloy and various alloys.

Description

Technical field: [0001] The invention belongs to the technical field of high-temperature alloys, and in particular relates to a purified smelting molten steel filter, which is suitable for the purified smelting of high-temperature alloys. Background technique: [0002] At present, K417 and other high-temperature alloys and their turbine blades have the largest output in my country, and usually the weight of precision castings only accounts for 30% of the input materials. For this reason, in the 1970s, the Institute of Metals stipulated that the return material of the K417 alloy within five times could be 100% reused. However, the large-scale production over the past 30 years has made the use of the returned material far more than 5 times, and there are serious problems in reuse, and the K417 alloy contains a relatively high content of strategic elements (15wt% Co, 60wt% Ni). Therefore, the purification and use of its returned materials are of great significance in terms of ...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a purified smelting molten steel filter, which solves the problem of low filtration efficiency of traditional superalloy purified smelting molten steel filter and high temperature alloy return material Difficulty in reuse and other problems, through simple, feasible and low-cost filters, high-purity and low-inclusion superalloy master alloys can be prepared, and precision castings can also be poured

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