(1. 廣西大學(xué) 資源與環(huán)境學(xué)院， 南寧 530004;
2. 中南工業(yè)大學(xué) 礦物工程系，長沙 410083)
摘 要: 用能帶理論分析了電化學(xué)調(diào)控浮選模型， 提出了采用有機(jī)抑制劑來改變礦物電子能級、 實(shí)現(xiàn)硫化礦的浮選分離。 研究了有機(jī)抑制劑對礦物抑制的兩種電化學(xué)機(jī)理： 一是有機(jī)抑制劑增加了礦物費(fèi)米能級， 礦物電子向黃藥的空能級傳遞， 雙黃藥被還原； 二是有機(jī)抑制劑降低了礦物邊緣能級， 從而導(dǎo)致礦物表面電子密度增大， 黃藥空能級被電子占據(jù)， 雙黃藥被還原。 開發(fā)了5種電化學(xué)浮選分離新型有機(jī)抑制劑， 實(shí)現(xiàn)了8種人工混合精礦和3種礦石的浮選分離。
關(guān)鍵字: 有機(jī)抑制劑； 電化學(xué)調(diào)控浮選分離； 能帶結(jié)構(gòu)； 硫化礦物
（1. College of Resource and Environment，Guangxi University， Nanning 530004， P.R.China;
2. Department of Mineral Engineering，Central South University of Technology， Changsha 410083， P.R.China）
Abstract:The model of electrochemical flotation was analyzed by means of energy band theory， a new viewpoint of electrochemical separation byusing organic depressants to change energy band of minerals was proposed. There are two mechanisms of depressing sulphide minerals in thepresence of organic depressants. One is to increase the Fermi level of minerals by organic depressant， which may lead the electrons transfer into unoccupiedlevel of xanthate， as a result dixanthogen is reduced， such as the case of thioglycollic acid. The other is to lower the limited level of sulphide minerals， which may increase the electronic density of mineral surface， as a resultsthe unoccupied levels of xanthate are occupied by electrons， and dixanthogen is reduced, as the case of sodium humate. Five new organic depressants for electrochemical separation were developed， eight artificial bulk concentrates were separated by use of new organic depressants and three sulphide ores were tested successfully.
Key words: organic depressants; electrochemical separation; structure of energy band; sulphide minerals
