焙烧法和浮选法对粉煤灰提铝残渣脱碳的对比研究  

Comparative study on decarbonization of aluminum extraction residue from fly ash by roasting and flotation

作　　者：王瑞 赵辉 赵宇航 WANG Rui;ZHAO Hui;ZHAO Yuhang(Guoneng zhuneng Group Co.,Ltd.,Ordos 010300,China;Ordos Northwest Energy Chemical Co.,Ltd.,Ordos 010321,China)

机构地区：[1]国能准能集团有限责任公司,内蒙古鄂尔多斯010300 [2]鄂尔多斯市西北能源化工有限责任公司,内蒙古鄂尔多斯010321

出　　处：《无机盐工业》2024年第9期136-141,共6页Inorganic Chemicals Industry

摘　　要：为实现粉煤灰“一步酸溶法”提取氧化铝后残渣(白泥)的资源化利用,对白泥进行脱碳研究,开展了白泥焙烧脱碳和浮选脱碳实验。结果表明:焙烧脱碳可获得烧失量小于2%的合格白泥产品,但对温度控制要求严格,控制不当产品合格率降低,同时生产过程能耗高;浮选脱碳不仅可获得合格白泥产品,还可以回收碳资源。进一步考察不同浮选工艺参数对白泥脱碳效率的影响,在矿浆与药剂作用时间为8 min、浮选时间为10 min、矿浆质量浓度为250 g/L、充气量为140 L/h、捕收剂(柴油)用量为4 kg/t、乳化剂(吐温-80)用量为1.5 kg/t、起泡剂(仲辛醇)用量750 g/t的条件下,白泥脱碳效果最好,浮选白泥烧失量达2.14%,碳回收率达89%,是优选的白泥脱碳方法。In order to realize the resource utilization of residue(white mud)produced by“one step acid method”extracting alumina from flyash,the white mud was studied for decarbonization.The roasting decarbonization flotation decarburization of white mud were conducted,the result was indicative that qualified white mud product with less than 2%firing loss could be obtained by roasting decarburization.However,the temperature need to be strictly controlled.The product was usually substandard if not controlled properly.At the same time,the process energy consumption was relatively high.Flotation decarburization could not only obtain qualified white mud,but also recover carbon resources.The influence of different flotation parameters on the decarburization efficiency was studied.The research showed that under the condition of pulp and reagent reaction time of 8 min,flotation time of 10 min,pulp density of 250 g/L,inflating volume of 140 L/h,capture agent(diesel)dosage of 4 kg/t,emulsifier(Tween-80)dosage of 1.5 kg/t,foaming agent(2-octanol)dosage of 750 g/t,firing loss of flotation white mud was 2.14%,and the carbon recovery was 89%,decarbonization efficiency was the best,flotation was the preferred white mud decarbonization method.

关 键 词：白泥 脱碳 烧矢量 浮选 

分 类 号：TQ127.2[化学工程—无机化工]