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测定了含Cr_2O_3炉渣的成渣温度.渣中含有少量(≈2%)Cr_2O_3,可使成渣温度下降30～80℃,Cr_2O_3含量超过4%,成渣温度又上升到1450℃±.因此在吹炼含铬铁水时,若渣中Cr_2O_3含量控制在4%以下时,吹炼操作不会有困难.在吹炼含铬半钢情况下,若用红砖作助熔剂,同时炉渣成份控制在下列范围内,CaO/SiO_2=3～5,Cr_2O_3<7%, ∑FeO～20%, Al_2O_3≈3%,,成渣温度火致在1280～1360℃.工业试验证明,吹炼操作顺利,渣化得快,化得透.对红砖的助熔作用也作了初步观察.
The slagging temperature of Cr 2 O 3 -containing slag was measured, and the slag contained a small amount of Cr 2 O 3 (≈2%), which resulted in a decrease of slag forming temperature by 30-80 ℃, a Cr 2 O 3 content of over 4% and a slag temperature of 1450 ℃ ±. When the chromium-containing molten iron is blown, if the Cr_2O_3 content in the slag is controlled below 4%, there is no difficulty in the blowing operation.In the case of blowing the chromium-containing semi-steel, if the red brick is used as a flux and the slag content is controlled at In the following range, CaO / SiO_2 = 3 ~ 5, Cr_2O_3 <7%, ΣFeO ~ 20%, Al_2O_3≈3% ,, slag temperature caused by fire at 1280 ~ 1360 ℃ .Industrial test showed that the blowing operation is smooth, slag The faster, more thoroughly. The red brick fluxing effect has also made a preliminary observation.