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针对攀钢集团西昌钢钒有限公司200 t半钢炼钢转炉采用干法除尘工艺时出现的泄爆率高、煤气回收量低、除尘效果差等问题,结合半钢炼钢生产实际,对干法除尘泄爆原理及其在半钢炼钢转炉应用的难点进行分析,在此基础上对转炉风机转速、供氧制度、造渣加料制度及氧枪枪位制度等工艺参数进行改进。改进后的应用效果表明,200 t半钢炼钢转炉泄爆率由7.60%降低到0.08%,煤气回收量由54.6提高到123.6 m3/t,除尘灰回收量显著增加;同时,转炉冶炼周期缩短4 min,氧耗降低2.4 m3/t,除尘效果更好,保证了转炉冶炼的顺行,大大降低了炼钢能耗。
Aiming at the problems of high explosion venting rate, low gas recovery and poor dust removal performance of the 200 t semi-steel steelmaking converter of Panzhihua Iron and Steel Group Xichang Steel and Vanadium Co., Ltd., combined with the actual production of semi-steel steelmaking, Method and its application in semi-steel steelmaking converter were analyzed. On the basis of this, the process parameters of converter fan speed, oxygen supply system, slagging feeding system and oxygen lance gun position were improved. The improved application results show that the blast-out rate of 200t semi-steel steelmaking converter decreased from 7.60% to 0.08%, the gas recovery increased from 54.6 to 123.6 m3 / t, the dust recovery significantly increased; meanwhile, the converter smelting cycle was shortened 4 min, oxygen consumption decreased 2.4 m3 / t, better dust removal, to ensure the smooth smelting furnace, greatly reducing the energy consumption of steelmaking.