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随着鞍钢自产铁精矿供应量逐年减少,扩大进口矿用量成为必然。根据鞍钢炼铁总厂烧结车间和西区烧结车间的原料条件,在实验室进行了配加巴西南部粉矿的烧结杯试验研究。结果表明:配加巴西粉矿超过20%后,烧结矿的转鼓强度下降幅度明显。随着巴西南部粉矿配比增加,垂直烧结速度增大,利用系数提高,燃耗略有提高。相同配比条件下,配矿C方案时烧结矿转鼓要高于A、B方案,但烧结速度较慢、烧结机利用系数低,烧结燃耗增加。配加巴西粉矿超过20%后,烧结矿的低温还原粉化趋于严重。相同配比条件下,配矿C方案时烧结矿低温还原粉化最优。据此认为:采用巴西南部粉矿配比不超过20%时,可获得较好的烧结指标。工业应用中应避免采用B配矿方案。
With the supply of iron concentrate produced by Ansteel decreasing year by year, it is inevitable to expand the amount of imported ore. According to the raw materials conditions of Sintering Plant in Anshan Iron and Steel Co., Ltd. and Sintering Plant in the West Zone, the sintering cup experiment with flour mines in southern Brazil was carried out. The results show that with the addition of more than 20% of the Brazilian ore, the drum strength of the sinter decreases obviously. With the increase of the proportion of powder ore in the south of Brazil, the vertical sintering rate increases, the utilization coefficient increases, and the fuel consumption increases slightly. Under the same proportioning condition, the sinter drum with ore C scheme is higher than the scheme A and B, but the sintering speed is slower, the sintering machine utilization coefficient is low and the sintering fuel consumption is increased. With Brazil powder ore more than 20%, the sintering of low temperature reduction powder tends to be serious. The same proportioning conditions, with the program of ore C cryogenic reduction pulverization optimum. Based on this, it is considered that the better sintering index can be obtained when the proportion of powder ore in southern Brazil does not exceed 20%. Industrial applications should avoid using B with mine program.