中南大学学报（自然科学版）2018，Vol.49Issue(2)：268-274,7.DOI:10.11817/j.issn.1672-7207.2018.02.002
SCMG对煤和蒙脱石浮选分离的影响
Influence of SCMG on separation of coal and montmorillonite
摘要
Abstract
A type of inhibitor ethyloic sesbania cannabian pers gum (SCMG) was obtained by etherification of sesbania gum with sodium hydroxide and chloroacetic acid. The effect of SCMG on separation of coal and montmorillonite and the inhibition mechanism of SCMG were investigated by mineral flotation, adsorption experiment and X-ray photoelectron spectroscopy (XPS) analysis. The results show that SCMG has good selectivity for inhibition, which depresses the flotation of montmorillonite observably. With SCMG mass fraction of 500 g/t, the ash content (mass fraction) of flotation concentrate decreases by 17.25％ compared with the one without inhibitor. The different adsorption capacities of coal and montmorillonite to SCMG make SCMG own selective inhibition. The SCMG adsorption process of coal and montmorillonite ends to be monolayer adsorption. Langmuir adsorption constantKA of montmorillonite is larger than that of coal, which makes montmorillonite absorb SCMG preferentially. SCMG is absorbed on the surface of coal and montmorillonite by chemical adsorption, with the thickness of adsorption layer being about 0.26 nm and 0.68 nm, respectively.关键词
SCMG/蒙脱石/抑制剂/吸附Key words
SCMG/montmorillonite/inhibitor/adsorption分类
矿业与冶金引用本文复制引用
徐东方,朱书全,朱志波,崔浩然..SCMG对煤和蒙脱石浮选分离的影响[J].中南大学学报（自然科学版）,2018,49(2):268-274,7.基金项目
国家重点基础研究发展规划(973计划)项目(2012CB214901) （973计划）
国家自然科学基金资助项目(51404274) (Project(2012CB214901) supported by the National Basic Research Development Program(973 Program) of China （51404274）
Project(51404274) supported by the National Natural Science Foundation of China) （51404274）
