(中南大學(xué) 資源加工與生物工程學(xué)院，長(zhǎng)沙 410083)
摘 要: 針對(duì)含多種有價(jià)金屬的還原揮發(fā)氧化鋅煙塵，對(duì)各元素的揮發(fā)特性進(jìn)行熱力學(xué)平衡計(jì)算、實(shí)驗(yàn)室回轉(zhuǎn)窯揮發(fā)和中試試驗(yàn)，驗(yàn)證銦鎘鉛選擇性揮發(fā)效果，獲得高銦物料和脫除氟氯的高鋅焙砂的工藝路線。在實(shí)驗(yàn)室回轉(zhuǎn)窯中，銦和鉛的揮發(fā)率分別為93.20%和95.12%，同時(shí)，得到含鋅67.36%、含氟0.013%和氯0.407%的焙砂。在中試試驗(yàn)中，揮發(fā)產(chǎn)物中銦的平均含量超過(guò)700g/t，較原料富集比超過(guò)2倍，鉛的平均揮發(fā)率達(dá)到98.94%，焙砂中平均鋅含量為64.16%，鋅焙砂中氟和氯的含量分別降到了0.013%和0.211%，這說(shuō)明從氧化鋅煙塵中分離銦并獲得可以滿(mǎn)足電解鋅要求的焙砂的揮發(fā)效果非常顯著。
關(guān)鍵字: 煙塵；氧化鋅；銦；揮發(fā)
（School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:On the basis of zinc oxide fly ash bearing multiple valuable metals，thermodynamic equilibrium calculations, laboratory-scale rotary furnace volatilized experiments and pilot test concerning the volatilization of the metals Pb, Zn, In and Cd were carried out, which verified the processing route at the zinc oxide fly ash by selective volatilization of In, Cd and Pb to yield a high-In volatilized product and a high-Zn and removal fluorine and chlorine roasted product. In the laboratory-scale rotary furnace experiments, the volatilization rates of In and Pb are 93.20% and 95.12%, respectively, and the roasted product contains Zn 67.36%, F 0.013% and Cl 0.407%. In the pilot test, the volatilized product contains In more than 700 g/t, which enriches more than two times comparing with the fly ash, the volatilization rate of Pb is 98.94%, and the roasted product contains Zn 64.16%, F 0.013% and Cl 0.211%. The route have a prominent effect on separation In from zinc oxide fly ash, and the roasted product can completely meet the requirements of electrolytic zinc route．
Key words: fly ash; zinc oxide; indium; volatilization
