(中南大學(xué) 資源加工與生物工程學(xué)院，長(zhǎng)沙 410083)
摘 要: 采用DDA(十二胺)和KAX(異戊基黃原酸鉀)的陽(yáng)陰離子混合藥劑作為捕收劑，對(duì)異極礦進(jìn)行單礦物浮選及檢測(cè)，并與單獨(dú)使用DDA或者KAX作為捕收劑進(jìn)行比較。結(jié)果表明：采用DDA和KAX的摩爾比為1:3的混合捕收劑浮選異極礦時(shí)，比單獨(dú)使用DDA或者KAX對(duì)異極礦的浮選效果要好，且在pH值為10左右時(shí)浮選效果最佳，回收率達(dá)86%；DDA和KAX混合后各自所帶的陰、陽(yáng)離子電性中和，降低了捕收劑分子之間的靜電斥力，從而使混合捕收劑的臨界膠束濃度值降低，在礦物表面吸附時(shí)形成半膠束吸附的濃度值降低，更易于在異極礦表面形成半膠束吸附，對(duì)礦物浮選捕收效果增強(qiáng)。
關(guān)鍵字: 異極礦；浮選；十二胺；異戊黃藥；混合捕收劑；吸附模型
（School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The single mineral flotation and detection of hemimorphite in the presence of mixed collector (cationic/anionic) was investigated and compared with DDA (dodecylamine) or KAX (isoamylxanthate) alone. The results show that the flotation efficiency using mixed collectors (DDA and KAX) is better than that using DDA or KAX alone. The optimum pH value is about 10 with the topmost recovery rate of 86%. The mixture of DDA and KAX can decrease the micropolarity of the reagents sharply under the condition of low concentration, which can decrease the CMC value, form a micelle adsorption on the surface of hemimorpphite easier and enhance the capacity of collecting.
Key words: hemimorphite; flotation; dodecylamine; isoamylxanthate; mixed collector; adsorption quantity
