——黃藥與硫化礦物作用的能帶模型
(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: 用能帶模型研究了黃藥與硫化礦物的作用機(jī)理， 說明了硫化礦物表面捕收劑膜的穩(wěn)定性與半導(dǎo)體能帶結(jié)構(gòu)的關(guān)系，并推導(dǎo)出黃鐵礦Barsky關(guān)系式。對(duì)礦物表面雙黃藥解吸作用的研究，表明礦物表面雙黃藥的解吸主要受控于礦物電子能級(jí)，而半導(dǎo)體礦物邊緣能級(jí)和費(fèi)米能級(jí)影響礦物表面雙黃藥的穩(wěn)定性，改變硫化礦物的費(fèi)米能級(jí)或邊緣能級(jí)可以實(shí)現(xiàn)雙黃藥的解吸。根據(jù)電化學(xué)浮選抑制的能帶模型，可開發(fā)出高效硫化礦有機(jī)抑制劑。
關(guān)鍵字: 能帶模型； 硫化礦物； 雙黃藥； 電化學(xué)浮選
——Energy band model of xanthate interacting with sulphide minerals
（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 interaction mechanism between xanthate and sulphide minerals was discussed by means of energy band model, and the correlation of stability of collector's coating with energy band structure of semiconductor was also illustrated, meanwhile the Barsky formula was deduced from theory. The correlation between desorption of dixanthogen on the mineral surface and energy level of mineral was researched. The results show that the desorption of dixanthogen on mineral surface is mainly controlled by electronic level of minerals; Fermi level and edge level can affect the stability of dixanthogen electrochemically adsorbing on the mineral surface. Based upon energy band model of electrochemical separation, new organic depressants can be developed.
Key words: model of energy bands; sulphide minerals; dixanthogen; electrochemical flotation
