高炉への粉体吹き込みによる銑中 Si 低下テスト

概要

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In order to lower the Si content in pig iron, the injection of powder restraining the reduction of SiO_2 was examined at Chiba No.2 Blast Furnace with 1380m^3 inner volume and 20 tuyeres. The powder used is CaCO_3 or iron oxide and it was injected through 5 tuyeres of 20 ones. In case of the injection of CaCO_3 powder in 8 kg/t-p, 1) Si content in pig iron decreased from 0.84% to 0.68% at 1500℃. 2) S content in pig iron decreased from 0.034% to 0.027% at 1500℃. 3) Si content in fine particles sampled in raceway is less than that without injection of CaCO_3 powder. In case of the injection of iron oxide powder in 32 kg/t-p, 1) Si content in pig iron decreased from 0.72% to 0.57% at 1470℃. 2) S content in pig iron increased from 0.04% to 0.05% at 1470℃. 3) Si content in fine particles sampled in raceway is less than that without injection of iron oxide powder.
社団法人日本鉄鋼協会の論文
1985-06-01