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杭州钢铁厂三号高炉(255米~3)自1979年一月中修恢复生产以来,炉况不稳。检修后炉容缩小(上小下大),故风量小,风压高,鼓风动能低。又因进风不均匀,进风量小的风口焦炭回旋不活跃,影响炉料均匀下降。三号高炉是马基式布料器。中修后一段时期装料制度仍以正花装为主,有时采用正花装加倒花装,或全部倒花装。这段时期炉况顺行不够理想,塌坐料较频繁,炉温波动较大,生铁炉外脱硫炉数较多,焦比在600公斤以上。
Since the third blast furnace at Hangzhou Iron & Steel Plant (255m ~ 3) resumed production in January 1979, the furnace was unstable. After the overhaul of furnace capacity reduced (small small), so the air volume is small, high pressure, low drum kinetic energy. Because of uneven air intake, air inlet small coke swirl is not active, affecting the average charge down. The third blast furnace is a horse-based distributor. After a period of repair charge system is still mainly positive spend, and sometimes spend positive plus spend down, or all downflowery equipment. During this period, the furnace condition was not ideal and the slump material was more frequent, the temperature of the furnace fluctuated greatly, and the number of desulfurization furnace outside the pig iron furnace was more than 600 kg.