改性冷轧酸碱废水喷洒烧结矿技术经济分析

Economic Analysis on Technology for Spraying Modified Acid-alkali Wastewater Resulted in Cold Rolling onto Sinter

介绍了含氯化钙改性废水溶液的配制方法及其喷洒烧结矿的实验。实验室实验结果表明,烧结矿的低温还原粉化性能得到改善,氯化钙浓度为2%的改性废水,喷洒量为烧结矿总重量的2%时,与不喷洒的烧结矿基样相比,RDI+6.3提高41.9%、RDI+3.15提高25.1%、RDI-0.5降低3.8%。用改性冷轧酸碱废水代替现有工艺喷洒烧结矿500万t,降低废水处理成本和烧结矿的生产成本,年效益约569.77万元。同时避免了酸碱废水和散料灰对环境的污染。

The method for preparing the modified wastewater solution containing calcium chloride and the experiment for spraying the modified wastewater solution containing calcium chloride onto the sinter were introduced. The experimental results in laboratory show that the low temperature reduction degradation index of the sinter was improved, the values of both RDL63 and RDI＋3.15 of the sinter which was sprayed by the modified wastewater with the concentration of CaC12 2% increased by 41.9% and 25.1% respectively while the index of RDI^5 decreased by 3.8% when the spraying amount of the wastewater made up 2% of the total mass of the sinter sprayed in comparison with those reference samples of the sinter which was not sprayed by using the modified wastewater. So five million tons of the sinter were sprayed by the modified acid-alkali wastewater resulted in cold rolling instead of the current liquid sprayed by the existing technology, which cut down the cost for wastewater treatment and the cost for preparing a sinter. And therefore the annual benefit of about 5.6977 million Yuan was achieved. At the same time the environment is free of pollution caused by the acid-alkali wastewater and bulk material powders.