六盘水师范学院学报2024，Vol.36Issue(3)：19-27,9.DOI:10.16595/j.1671-055X.2024.03.003
非离子型捕收剂作用下的铝电解渣浮选脱碳试验研究
Study on the Flotation Decarbonization of Aluminum Electrolysis Slag under the Action of Non-ionic Collectors
摘要
Abstract
Due to selective oxidation and unequal combustion on the surface of the carbon anode during the aluminum electrol-ysis process,carbon particles will break off and form carbon residue,known as anode carbon slag.The carbon slag contains graphi-tized carbon with an oxidized surface and toxic impurities such as calcium fluoride(CaF2),corundum(α-Al2O3),and cryolite(NaAl11O17).The XPS analysis results indicate that the main oxygen-containing groups present on the surface of the carbon parti-cles in the raw carbon slag are O1s C=O,with a content of 45.54%.Laser particle size analysis shows that the sample contains a large amount of fine inorganic mineral clay,which can cover the surface of the carbon particles during the flotation process,there-by further reducing the hydrophobicity of the carbon particle surface.Therefore,to recover the carbon particles in the aluminum electrolysis slag through flotation,it is necessary to grind the solid slag into finer particles and add a higher amount of kerosene.To achieve an ideal recovery rate of carbon particles by adding traditional collectors such as kerosene,this study selected non-ionic surfactants oleic acid,methyl linoleate,and ricinoleic acid as flotation collectors.The flotation results show that the optimal dosage of kerosene and ricinoleic acid for decarburization is 1500g/t,while the optimal dosage of oleic acid and methyl linoleate is 500g/t.Moreover,when the dosage of methyl linoleate is 500g/t,the flotation effect is the best,with the maximum recovery rates of concen-trate and combustible matter being 25.70%and 73.12%,respectively.In addition,combined with PABI testing,it is shown that methyl linoleate can better improve the hydrophobicity of the carbon particle surface in the aluminum electrolysis slag,which is consistent with the flotation results.关键词
阳极炭渣/泡沫浮选/粒度分布/表面疏水性/颗粒-气泡粘附Key words
Carbon anode slag/Froth flotation/Particle size distribution/Surface hydrophobicity/Particle-bubble attachment分类
化学化工引用本文复制引用
王市委,吴水莲,孔荣洁..非离子型捕收剂作用下的铝电解渣浮选脱碳试验研究[J].六盘水师范学院学报,2024,36(3):19-27,9.基金项目
国家自然科学基金项目"气液界面流动性与吸附特性协同作用下低阶煤浮选的矿化行为研究"(52264032) （52264032）
大学生创新创业计划项目"基于不同气泡形态下的低阶煤浮选矿化行为研究"(202310977082). （202310977082）
