轧制油泥的再生综合利用
发布时间：2018-10-18 06:59
【摘要】：轧制油泥是钢铁生产过程中的副产品,主要由金属颗粒、水和废油组成。随着中国钢铁行业的快速发展,每年都会产生大量的轧制油泥。因为它会对水源或者土壤造成危害,轧制油泥已经成为一个巨大的环境问题。如果可以好好利用,不仅有利于环境保护,还可使资源得到重复利用。轧制油泥分为上层轧制废油与下层油泥两部分,针对这两部分分别采取不同的方式进行处理。首先对于上层轧制废油,采用絮凝为主其他方法为辅的方法对其进行再生。以阳离子聚丙烯酰胺为絮凝剂,通过正交试验筛选的优化最佳絮凝条件为：废油：阳离子聚丙烯酰胺的质量比=5：1、搅拌时间=30mmin、搅拌温度=25℃、搅拌速率=700 r/min、废油：20%碱量=5 ml/g。通过絮凝处理后,废油的物理性质明显改善。随后,进行减压精馏、减压蒸馏、吸附精制等操作,最后对过滤+絮凝+蒸馏、过滤+絮凝+精馏、过滤+絮凝+白土精制三条工艺进行技术经济比选。而针对轧制底泥,我们首先采用“碱液+超声”的方法对其进行除油,并考察碱液的浓度、碱液与底泥的比例以及超声时间对金属回收率的影响,最佳的除油条件是：碱液浓度为5%,碱液：底泥--6：1、超声时间为25mmin,对应的回收率为63%。分析结果表明,处理后的固体金属粉末形状蓬松,分散性好,其主要成分为铁、铬、镍、锰的单质金属元素及其氧化物,这四种元素含量在70%以上。之后将这种含铁的金属粉末作为铁源制备Fe2O3/graphene复合材料,并用作阳极电池材料,在电流密度为100 mA/g下,恒流充放电100圈后,锂电容量仍达560mAh/g,并且在2000和5000mA/g的高电流密度下,容量仍达508和380mAh/g。
[Abstract]:Rolling sludge is a by-product of iron and steel production process, mainly composed of metal particles, water and waste oil. With the rapid development of iron and steel industry in China, a large number of rolling sludge will be produced every year. Rolling mud has become a huge environmental problem because it can harm water or soil. If we can make good use of it, it is not only beneficial to environmental protection, but also to the reuse of resources. The rolling sludge is divided into upper rolling waste oil and lower layer oil, which are treated in different ways. Firstly, the upper rolling waste oil was regenerated by flocculation and other methods. Using cationic polyacrylamide as flocculant, the optimum flocculating conditions were as follows: mass ratio of waste oil: cationic polyacrylamide = 5: 1, stirring time = 30 min, stirring temperature = 25 鈩，
本文编号：2278350
[Abstract]:Rolling sludge is a by-product of iron and steel production process, mainly composed of metal particles, water and waste oil. With the rapid development of iron and steel industry in China, a large number of rolling sludge will be produced every year. Rolling mud has become a huge environmental problem because it can harm water or soil. If we can make good use of it, it is not only beneficial to environmental protection, but also to the reuse of resources. The rolling sludge is divided into upper rolling waste oil and lower layer oil, which are treated in different ways. Firstly, the upper rolling waste oil was regenerated by flocculation and other methods. Using cationic polyacrylamide as flocculant, the optimum flocculating conditions were as follows: mass ratio of waste oil: cationic polyacrylamide = 5: 1, stirring time = 30 min, stirring temperature = 25 鈩，
本文编号：2278350
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