(東北大學(xué) 多金屬共生礦生態(tài)化冶金教育部重點(diǎn)實(shí)驗(yàn)室，沈陽(yáng) 110819)
摘 要: 硫化礦加壓浸出體系的氧化過程主要在液相內(nèi)進(jìn)行，氧氣的氣含率對(duì)氣液固三相反應(yīng)的最終效果和有價(jià)金屬的提取率具有重要意義。本研究使用透明石英高壓釜和高速照相機(jī)等設(shè)備，在高溫高壓條件下，研究推進(jìn)式攪拌槳工作過程中氣液兩相混合狀態(tài)和氣泡在溶液中的行為規(guī)律。結(jié)果表明：當(dāng)攪拌速度從400 r/min上升到550 r/min，氣含率從0.137%上升到1.58%；當(dāng)溫度從363 K增加到423 K時(shí)，氣含率從1.22%降低到0.774%；當(dāng)氧分壓從0.2 MPa增加至0.8 MPa，氣含率從0.997%降低到0.951%。最后，通過對(duì)實(shí)驗(yàn)數(shù)據(jù)進(jìn)行因次分析，得出氣含率的準(zhǔn)數(shù)方程。
關(guān)鍵字: 硫化礦；加壓浸出；氣含率；因次分析；準(zhǔn)數(shù)方程
（Key Laboratory for ecological Metallurgy of Multimetallic Mineral, Ministry of Education, Northeastern University, Shenyang 110819, China）
Abstract:The oxidation process of the sulfide ore pressure leaching is mainly carried out in the liquid phase. Therefore, the gas holdup is essential for the gas-liquid-solid phase reaction and the extraction rate of valuable metals. In this study, the transparent quartz autoclave and high speed camera were used to investigate the mixture condition of the gas-liquid phase and the behavior of bubbles in the solution under high temperature and high pressure conditions. The results show that when the agitation rate increases from 400 r/min to 550 r/min, the gas holdup increases from 0.137% to 1.58%. When the temperature increases from 363 to 423 K, the gas holdup decreases from 1.22% to 0.774%. When the oxygen partial pressure increases from 0.2 MPa to 0.8 MPa, the gas holdup decreases from 0.997% to 0.951%. Finally, through the analysis of experimental data, the criterion equation about gas holdup is derived.
Key words: sulfide ore; pressure leaching; gas holdup; dimensional analysis; quasi-logarithmic equation
