(1. 低品位難處理黃金資源綜合利用國(guó)家重點(diǎn)實(shí)驗(yàn)室，上杭 364200；
2. 中南大學(xué) 資源加工與生物工程學(xué)院，長(zhǎng)沙 410083)
摘 要: 利用單礦物電位調(diào)控浮選和循環(huán)伏安掃描方法研究浮選與電位的關(guān)系，考察黃鐵礦的浮選電位范圍(電極電位)，并繪制黃鐵礦在不同環(huán)境中的φ—pH—c圖。結(jié)果表明：黃鐵礦與黃藥作用的起始電位為0.1 V左右；電位在0.1~0.3 V之間時(shí)，反應(yīng)受表面電子轉(zhuǎn)移步驟控制；當(dāng)電位大于0.3 V時(shí)，反應(yīng)受傳質(zhì)過(guò)程控制。黃鐵礦對(duì)黃藥氧化起電催化作用。黃藥在黃鐵礦表面的吸附過(guò)程是整個(gè)反應(yīng)的控制步驟，磨礦和攪拌均會(huì)影響捕收劑與黃鐵礦的作用。
關(guān)鍵字: 黃鐵礦；黃藥；電極過(guò)程；動(dòng)力學(xué)；電催化
（1. The State Key Laboratory of Comprehensive Utilization of Low-Grade Ores, Shanghang 364200, China;
2. School of Mineral Processing and Bioengineering, Central South University, Changsha 410083,）
Abstract:The relationship between the flotation and potential of single mineral was studied by potential control flotation and cyclic voltammetry method, the range of pyrite flotation potential was measured, and the φ—pH—c diagram of pyrite in different environments was drawn. The results show that when the initial potential of the reaction between pyrite and xanthate is about 0.1 V；and when the electrical potential is between 0.1 and 0.3 V, the reaction is controlled by surface electron transfer step; yet when the electrical potential is over 0.3 V, the mass transfer process is the dominate step. Pyrite can electro-catalyze the oxidation of xanthate. The adsorption of xanthate on pyrite surface is the control step of the whole reaction, and grinding and mixing may affect the reaction between pyrite and collector.
Key words: pyrite; xanthate; electrode process; kinetics; electro-catalysis
