CAJ | 학술논문

传统的金萃取过程为间歇作业，存在操作不连续和有机相损失大等缺点。而离心萃取器作为一种新型的高效萃取设备，具有萃取效果好、可连续操作和操作弹性好等优点，因而在液-液萃取中得到广泛应用。对离心萃取器在金萃取过程中的萃取性能进行了实验研究，结果表明：在保证DBC不发生乳化的前提下，转鼓的最大转速为3000 r/min；随着转鼓转速的增大，金萃取率先显著增大，而后增速减缓，而流比的减小使得转速对萃取率的影响减弱；随着流比的减小，萃取率逐渐降低，且降低速度逐渐增大，而转速的增大使得萃取率随流比的变化幅度增强；随着萃取级数的增大，萃取率迅速增加，但增加速度逐渐减小，最终达到稳定。对含金料液进行4级连续逆流萃取，控制转鼓转速为2000 r/min，流比O/A=1∶3，金萃取率可达98%以上。
전통적금췌취과정위간헐작업，존재조작불련속화유궤상손실대등결점。이리심췌취기작위일충신형적고효췌취설비，구유췌취효과호、가련속조작화조작탄성호등우점，인이재액-액췌취중득도엄범응용。대리심췌취기재금췌취과정중적췌취성능진행료실험연구，결과표명：재보증DBC불발생유화적전제하，전고적최대전속위3000 r/min；수착전고전속적증대，금췌취솔선현저증대，이후증속감완，이류비적감소사득전속대췌취솔적영향감약；수착류비적감소，췌취솔축점강저，차강저속도축점증대，이전속적증대사득췌취솔수류비적변화폭도증강；수착췌취급수적증대，췌취솔신속증가，단증가속도축점감소，최종체도은정。대함금료액진행4급련속역류췌취，공제전고전속위2000 r/min，류비O/A=1∶3，금췌취솔가체98%이상。
Traditional gold extraction is an intermittent process,that has such problems as long operation time, large organic phase-loss and so on.As a new type of high efficient extraction equipment,the centrifugal extractor has the advantages of high efficiency,continuous operation and high operating elasticity,so it is widely used in liquid-liquid extraction.The application of centrifugal extractor in gold extraction was studied.The results show that the max rotation speed is 3 000 r/min under the premise that DBC is not emulsify.With rotation speed increasing,the extractability increases obviously first and then the increase rate slows down gradually,but the decrease of the phase ratio delays this tendency.With the decreasing of phase ratio,the extractability decreases gradually,the decrease rate becomes more significant,and this tendency is also enhanced by the increasing of rotation speed.With the increasing of extraction stages,the extractability increases rapidly,but the growing rate decreases,and finally reaches a steady state.Four stages of counter-current extraction was carried out in centrifugal extractor.Under the conditions of 2 000 r/min rotation speed,O/A=1∶3,the extractability could be arrived at 98%.