フィルターによる介在物の付着分離効果

概要

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To separate inclusions from molten steel, a new method by filtration which is different from conventional ones based on floating-out of inclusions was investigated. Since filters with pores smaller than the diameter of inclusion are considered not to be applicable to molten steel, ceramic filters with many small holes were used with expectation of getting inclusions adhered on them. As the first step the influences of filter shape design and deoxidation of steel on the filtration of inclusions were investigated. Results obtained are summarized as follows : (1) The inclusions filtered are only of alumina type and therefore this filter is effective for removal of inclusion in aluminum killed steel. (2) Inclusions adhere at first on the edge of a filter pore where the flow of molten steel changes and grow to cover on the top surface of the filter and fill up the inner part of the pore. When the layer of adhered inclusions on the filter becomes thick, the molten steel can not go through the filter. (3) From the reason mention above, the increase of thickness of the filter dose not improve removal of inclusions.
社団法人日本鉄鋼協会の論文
1985-04-01