(1. 西安科技大學(xué) 化學(xué)與化工學(xué)院，西安 710054；
2. 東北大學(xué) 資源與土木工程學(xué)院，沈陽(yáng) 110819；
3. 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)
摘 要: 通過(guò)浮選試驗(yàn)、離子濃度測(cè)定、動(dòng)電位測(cè)定和理論計(jì)算等方法研究了方解石和六偏磷酸鈉對(duì)白鎢礦浮選的影響。結(jié)果表明：六偏磷酸鈉與方解石存在協(xié)同作用，可強(qiáng)化六偏磷酸鈉對(duì)白鎢礦的抑制作用；方解石主要通過(guò)鈣離子強(qiáng)化六偏磷酸鈉對(duì)白鎢礦的抑制作用，碳酸根離子不影響六偏磷酸鈉的抑制性能，過(guò)量碳酸根離子的存在反而能夠減弱方解石和六偏磷酸鈉對(duì)白鎢礦的協(xié)同抑制作用。機(jī)理研究表明，方解石表面的鈣離子在六偏磷酸鈉的作用下可解吸至溶液中，增加溶液中的鈣離子濃度，使六偏磷酸鈉對(duì)白鎢礦浮選的抑制作用增強(qiáng)。
關(guān)鍵字: 白鎢礦；方解石；六偏磷酸鈉；鈣離子；浮選
（1. School of Chemistry and Chemical Engineering, Xi’an University of Science and Technology, Xi’an 710054, China;
2. School of Resource and Civil Engineering, Northeastern University, Shenyang 110819, China;
3. State Key Laboratory of Comprehensive Utilization of Low Grade Refractory Gold Resources, Shanghang 364200, China）
Abstract:The depressing effect of sodium hexametaphosphate and calcite on scheelite recovery was studied by flotation tests, dissolution measurements and theoretical calculation. The results indicate that the synergistic effect existed between sodium hexametaphosphate and calcite has significant depressing effect on the scheelite flotation. Calcite will enhance the depression of sodium hexametaphosphate with the action of calcium ions on its surface. The carbonate ions have little effect on the depressing effect of sodium hexametaphosphate, instead, the presence of excess carbonate ions can decrease the synergistic depressing effect of calcite and sodium hexametaphosphate on scheelite flotation. The sodium hexametaphosphate can not only react with the scheelite, but also it will deadsorb the calcium ions of calcite, thus increases the calcium ions concentration in solution, which is benefit to the depression of scheelite flotation.
Key words: scheelite; calcite; sodium hexametaphosphate; calcium ions; flotation
