炼铁除尘灰综合回收试验研究

根据炼铁除尘灰的性质,采用预浸除盐—浮选—磁选—重选联合流程回收其中的铁、碳。碳浮选时采用酸化水玻璃作为分散剂,同时清洗矿物表面,有效抑制了硅及其他非金属氧化物,中性油与酸化脂肪醇作为混合捕收剂,提高了捕收剂的选择性,在确定的工艺条件下,可获得C品位65.42%,C回收81.59%,铁品位54.28%,铁回收率67.95%的分选指标。

Experimental Research on Comprehensive Recovery of Ironmaking Dedusting Ash

According to the properties of ironmaking dedusting ash,the combined flowsheet of preimmersing desalting-Flotation-magnetic separation-gravity separation was adopted to recover iron and carbon.When carbon was flotated,the acidized water glass was adopted as dispersant.Meanwhile,it could be used to wash the surface of minerals,effectively inhibiting silicon and other non-metal oxides.When the neutral oil and the acidizing fatty alcohol were selected as mixed collector,the selectivity of the collector was improved.Under the certain technological condition,the separation index with the carbon grade of 65.42 and its recovery of 81.59% and the iron grade of 54.28% and its recovery of 67.95% were obtained.