小型溶鉱炉による砂鉄使用の研究 : 砂鉄の研究 I

概要

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We studied on the use of iron sand in the blast furnace. In the case of pig iron making with a high rate charge of iron sand, it is well known that pig iron runs out of the slag tapping hole at slagging. Therefore in actual operation, it is not practicuble to use iron sand in large quantities. Thorough investigation of this problem shows that viscosity of pig iron grows worse with the increase of Ti in pig iron, and sticky iron does not flow out well at tapping, and as the result pig iron surface becomes higher than the slag tap hole of the furnace and pig iron runs out of the slag tap hole. We studied how to decrease Ti content of pig iron and improve iron viscosity, and found that blowing of fines ore through the pig iron layer was the most effective for oxidization (slagging) of Ti in pig iron. As the first step to industrialization of this method, we applied it to the small blast furnace (inner volume 50m^3) and found that blast furnace operation could be made successfully even with 50% iron sand charging. This method is being applied for a patent.
社団法人日本鉄鋼協会の論文
1964-01-01