(1. 江西理工大學(xué) 江西省礦業(yè)工程重點實驗室，贛州 341000；
2. 中南大學(xué) 資源加工與生物工程學(xué)院，長沙 410083)
摘 要: 通過浮選試驗、吸附量試驗和紅外光譜測試，考察捕收劑戊黃藥(PAX)和抑制劑羧甲基纖維素(CMC)的添加順序?qū)G泥石與黃鐵礦浮選分離的影響，并研究其作用機理。結(jié)果表明：先加抑制劑羧甲基纖維素時，羧甲基纖維素是綠泥石的有效抑制劑，但也會抑制黃鐵礦的浮選，影響綠泥石與黃鐵礦的浮選分離；先加入捕收劑戊黃藥時，羧甲基纖維素對黃鐵礦的抑制作用減弱，而綠泥石的浮選回收不受影響，黃鐵礦與綠泥石的分離選擇性提高。抑制劑羧甲基纖維素能同時吸附在黃鐵礦與綠泥石表面，而捕收劑戊黃藥只能吸附在黃鐵礦表面。戊黃藥與羧甲基纖維素在黃鐵礦表面存在競爭吸附，先加捕收劑時，戊黃藥的預(yù)先吸附降低了羧甲基纖維素在黃鐵礦表面的吸附量，減弱了羧甲基纖維素對黃鐵礦的抑制作用，提高了黃鐵礦與綠泥石的分離選擇性。
關(guān)鍵字: 綠泥石；黃鐵礦；戊黃藥；浮選分離；羧甲基纖維素；競爭吸附
（1. Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;
2. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The effects of collector potassium amyl xanthale (PAX) and depressant carboxy methyl cellulose (CMC) addition order on the separation of chlorite from pyrite were investigated by flotation tests, adsorption tests and FTIR study. The results show that CMC is an effective depressant in the flotation of chlorite, while it also depresses the flotation of pyrite. With the addition of PAX first, the depression effect of CMC on the pyrite is weakened while the chlorite flotation recovery is not influenced. CMC is adsorbed on the surfaces of both pyrite and serpentine while PAX is only adsorbed on the pyrite surface. CMC and PAX compete in adsorbing on pyrite surface and the adsorption density of CMC decreases in the presence of a pre-adsorbed layer of PAX. However, there is no competitive adsorption on the chlorite surface between PAX and CMC, while PAX can not be adsorbed on the chlorite surface.
Key words: chlorite; pyrite; potassium amyl xanthale; flotation separation; carboxy methyl cellulose; competitive adsorption
