| 摘要 |
<p>PURPOSE:To prevent the corrosion of refractory in inner wall of converter caused by endothermic reaction between CO2 and C in high temp. exhaust gas, by lining the part exposed to the high temp. gas in the inner wall of converter with a carbonaceous material or further arranging tuyeres for blowing carbon powder. CONSTITUTION:Pre-refined molten iron and scrap are charged in the converter 1 providing an oxygen top blowing lance 5 and bottom blowing tuyeres 6, to produce molten steel through decarbonizing reaction by the oxygen blowing. In this case, in order to prevent the corrosion of refractory in the inner wall of converter caused by high temp. exhaust gas, the carbon powder, such as coke, coal, etc., is lined together with binder on the part exposed to the highest temp. in the inner wall of converter, to form carbon lining 2. Or further, the tuyeres 4 for blowing carbon powder are arranged to blow the carbon powder in the high temp. exhaust gas, CO2 in the exhaust gas is reacted with the carbon material in the lining 2 or the carbon material from the tuyeres 4 and the endothermic reaction of CO2 + C 2CO is generated caused to lower the exhaust gas temp., and so the corrosion of refractory in the furnace is prevented and the CO concentration in recovered exhaust gas is increased, to recover as high caloric gas.</p> |
