含铁尘泥在烧结生产中高效使用技术研究

 为了科学、合理地利用这一资源,在掌握含铁尘泥理化特性的基础上,进行了不同含铁尘泥配比、不同配碳量的烧结试验研究,并进行了工业性试验。试验结果表明,含铁尘泥中的CaO和C等烧结生产所需加入的元素含量较高,有利于降低烧结矿成本,由于其粒度过细,不利于改善烧结透气性；含铁尘泥中碳的含量完全替代烧结燃料的碳含量时,随着含铁尘泥配加量的增加,烧结产质量指标变差；用含铁尘泥(含铁尘泥中碳含量按1/3比例折算成烧结染料)替代烧结燃料时,无论含铁尘泥配比为3.0%还是5.0%,其烧结产质量指标均与基准方案相近,而且有利于改善高炉经济效益指标,能够达到高效使用含铁尘泥的目的。本研究为高效使用含铁尘泥提供了理论基础和技术依据。

Technigue of High Efficient Use for Ferruginous Mud in Sintering Production

In the iron and steel enterprises, the sintering process and sintering plant are the best paths for waste recycling. Any type of ferruginous waste generated as a byproduct of the different stages of steel production could be used in this way. In order to use the ferruginous mud resources scientifically and rationally, the experimental studies and a pilot industrial test for different ferruginous mud mixture ratios and different carbon proportions are conducted on basis of physical and chemical properties control of ferruginous mud. Test results show that use of ferruginous mud with higher levels of substances requisite in the sintering production, such as CaO and C, helps to reduce the cost of sintering ore, however, its fine granularity is detrimental to the sintering permeability. The indexes of yield and quality of sinter decrease with increasing carbon content of ferruginous mud, when it entirely substitutes carbon from sintering fuel. On the other hand, when 1/3 of the carbon content is provided by ferruginous mud instead of sintering fuel, sintering quality is close to the baseline values. The theoretical foundation and technical basis for higher efficiency of sintering using ferruginous mud are offered.