(江西理工大學(xué) 江西省礦業(yè)工程重點實驗室，贛州 341000)
摘 要: 通過浮選試驗、吸附量測試和XPS分析，研究油酸鈉和聚醚P123組合捕收劑以及抑制劑海藻酸鈉在白鎢礦與方解石浮選分離中的作用，考察鈣離子對白鎢礦與方解石浮選分離的影響，并分析海藻酸鈉對方解石的抑制作用機(jī)理。結(jié)果表明：與常用捕收劑油酸鈉相比，油酸鈉和聚醚P123組合捕收劑提高白鎢礦的浮選回收率，并降低方解石的浮選回收率，但僅用捕收劑在試驗所研究的pH范圍內(nèi)無法實現(xiàn)白鎢礦與方解石的浮選分離。抑制劑海藻酸鈉在白鎢礦及方解石表面均能被吸附，但在方解石表面的吸附量顯著高于在白鎢礦表面的吸附量，從而對方解石具有選擇性抑制作用。鈣離子的存在對方解石和白鎢礦的浮選影響較小，對海藻酸鈉的抑制行為也沒有影響，使用海藻酸鈉做抑制劑能夠?qū)崿F(xiàn)白鎢礦與方解石的浮選分離。XPS分析表明海藻酸鈉作用后方解石表面鈣原子的特征吸收峰發(fā)生明顯偏移，說明海藻酸鈉主要是通過與方解石表面的鈣離子發(fā)生化學(xué)反應(yīng)而吸附在方解石表面。
關(guān)鍵字: 白鎢礦；方解石；組合捕收劑；海藻酸鈉；浮選分離
（Jiangxi Key Laboratory of Mining Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China）
Abstract:The role of combined collector and depressant sodium alginate in the flotation separation of scheelite from calcite was studied, the effect of calcium ion on the separation of scheelite and calcite was analyzed, and the depression mechanism of sodium alginate on calcite was discussed. The results show that, compared with the commonly used collector sodium oleate, the combine use of sodium oleate and polyether P123 improves the recovery of scheelite while decreases the recovery of calcite, but the flotation separation of scheelite and calcite can not be achieved by using collector only. The depressant sodium alginate can be adsorbed on the surface of both scheelite and calcite, but the adsorption amount on calcite surface is greater than that on scheelite surface. So sodium alginate has selective depression effect on calcite. The presence of calcium ion has little effect on the flotation of scheelite and calcite, and also does not influence the depression effect of sodium alginate. The flotation separation of scheelite and calcite can be achieved using sodium alginate as depressant. XPS analysis shows that the characteristic adsorption peak of calcium ion on calcite surface displaces obviously after interacting with sodium alginate, which illustrates that the adsorption of sodium alginate on calcite surface mainly through chemical reaction of sodium alginate with calcium calcite surface.
Key words: scheelite; calcite; combined collector; sodium alginate; flotation separation
