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以山东钢铁莱芜分公司50t电炉热装铁水冶炼20CrMnTiH齿轮钢实际生产数据为研究对象,利用统计学方法研究了原料铁水比对电炉冶炼吨钢电耗、吨钢氧耗及冶炼周期的影响。发现平均每增加1%的原料铁水,吨钢电耗降低4.602kW·h,吨钢氧耗增加0.147m3。电炉冶炼周期随铁水比增大开始逐步降低;当铁水比超过39.6%之后,电炉冶炼周期则随铁水比增大而略有增加,但吨钢冶炼电耗仍继续降低。铁水比达到70%以上时,吨钢平均冶炼电耗接近零。结合基于线性规划理论的优化配料计算,结果表明,随着铁水比的增加,吨钢原料消耗、电耗以及氧耗的成本之和逐渐降低。考虑冶炼周期及生产成本的综合控制,认为电炉冶炼齿轮钢最佳铁水比应为60%左右。
Taking the actual production data of 20CrMnTiH gear hot-rolled hot-rolled hot metal in 50t EAF of Laiwu Branch of Shandong Iron & Steel Co., Ltd. as the research object, the influence of the raw material hot metal ratio on the electricity consumption per ton of EAF, the oxygen consumption per ton and the smelting cycle was studied by using statistical methods. It was found that for every 1% increase of raw material hot metal, the electricity consumption per ton of steel was reduced by 4.602kW · h, and the oxygen consumption per ton of steel increased by 0.147m3. When the ratio of hot metal to hot metal exceeds 39.6%, the smelting cycle of electric furnace increases slightly with the increase of hot metal ratio, but the power consumption of one ton of steel smelting still continues to decrease. When the hot metal ratio reaches over 70%, the average power consumption per ton of steel is close to zero. Combined with the calculation of optimized ingredients based on linear programming theory, the results show that with the increase of the ratio of hot metal to molten steel, the sum of the cost of raw material consumption, electricity consumption and oxygen consumption gradually decreases. Considering the comprehensive control of the smelting cycle and the production cost, it is believed that the optimum hot metal ratio of EAF steel gear should be about 60%.