细粒赤铁矿精矿沉降效果影响因素实验研究  

Experimental Research on Influence Factors of Fine-grained Hematite Flotation Concentrate Based on Orthogonal Test

作　　者：胡宗岗 芦川 张芹[1] Hu Zonggang;Lu Chuan;Zhang Qin(College of Resources and Environmental Engineering,Wuhan University of Science and Technology,Wuhan,Hubei,China;China Baowu Steel Group Corporation Limited,Wuhan,Hubei,China)

机构地区：[1]武汉科技大学资源与环境工程学院,湖北武汉430081 [2]中国宝武钢铁集团有限公司武钢有限炼铁厂,湖北武汉430080

出　　处：《矿产综合利用》2023年第2期56-62,共7页Multipurpose Utilization of Mineral Resources

基　　金：国家自然科学基金面上项目(50974099)。

摘　　要：本文以细粒赤铁矿精矿作为研究对象,为探究铁精矿在实际生产浓密脱水阶段产生的浓密池溢流损失严重等问题,通过澄清层分界面平均沉降速度、上清液浊度和单位沉降面积等研究指标,考查细粒赤铁矿精矿的入料浓度、絮凝剂分子量、絮凝剂单耗、絮凝剂溶液浓度等因素对细粒赤铁矿精矿絮凝沉降的影响。设计正交实验探究细粒赤铁矿精矿絮凝沉降影响因素的实验研究。借助SPSS26统计软件对实验结果展开分析。研究结果表明:影响因素对平均沉降速度影响程度大小顺序为:絮凝剂单耗>絮凝剂溶液浓度>入料浓度>絮凝剂分子量;对上清液浊度影响程度大小顺序为:絮凝剂单耗>絮凝剂溶液浓度>入料浓度>絮凝剂分子量;对单位沉降面积影响程度大小顺序为:絮凝剂溶液浓度>入料浓度>絮凝剂单耗>絮凝剂分子量。综合考虑,在本实验中细粒赤铁矿精矿絮凝沉降效果较优条件为:絮凝剂分子量为1500万、入料浓度为10%、絮凝剂单耗为60g/t、絮凝剂溶液浓度为0.10%。This paper takes the fine-grained hematite concentrate as the research object.In order to explore the serious overflow loss of the thickening tank in the actual production of thickening and dehydration,the average sedimentation velocity of the clarification layer interface,supernatant turbidity and the unit sedimentation area and other research indicators were used to investigate the effects of fine-grained hematite concentrate feed concentration,flocculant molecular weight,flocculant unit consumption,and flocculant solution concentration on the flocculation and sedimentation of fine-grained hematite concentrate.An experimental study on the influencing factors of flocculation and sedimentation of fine-grained hematite concentrate was designed by designing an orthogonal test.The test results were analyzed with the help of SPSS26 statistical software.The research results show that the order of the influence factors on the average settling velocity is:flocculant unit consumption>flocculant solution concentration>feed concentration>flocculant molecular weight;the order of influence on supernatant turbidity is:flocculant unit consumption>flocculant solution concentration>feed concentration>flocculant molecular weight;the order of the degree of influence on the unit settling area is:flocculant solution concentration>feed concentration>flocculant unit consumption>flocculant molecular weight.Considering comprehensively,the optimal conditions for the flocculation and sedimentation effect of fine-grained hematite concentrate in this experiment are:the molecular weight of the flocculant is 15 million,the feed concentration is 10%,the unit consumption of the flocculant is 60 g/t,and the concentration of the flocculant solution is 0.10%.

关 键 词：赤铁矿 絮凝剂 絮凝沉降 正交实验 方差分析 

分 类 号：TD985[矿业工程—选矿]