CAJ | 학술논문

针现行季铵盐碱性介质下萃取钨工艺存在的再生步骤需消耗氢氧化钠试剂，并产生不能返回浸出的再生液，从而导致系统中碱和水的不平衡。针对此问题，采用HCO 3??CO 32?混合型季铵盐为萃取剂，取消萃取剂再生步骤，对直接从模拟钨矿苏打高压浸出液中萃取钨进行研究。考察温度、相比、接触时间和Na 2 CO 3浓度等因素对钨萃取性能的影响以及杂质在萃取过程中的行为，测定有机相的饱和萃取容量并绘制萃取等温线，并在此基础上进行模拟串级逆流萃取实验。结果表明：采用HCO 3??CO 32?混合型季铵盐萃取剂能有效地从钨矿苏打浸出液中选择性萃取钨；相对于采用CO 32?型季铵盐萃取剂，WO 3的萃取率和P、As的去除率虽有所减小，但能省去后续有机相再生步骤，实现萃取工序碱和水的平衡；模拟串级逆流萃取实验结果表明，经9级逆流萃取，WO 3的萃取率达95.64%，P、As的去除率达90%以上。
침현행계안염감성개질하췌취오공예존재적재생보취수소모경양화납시제，병산생불능반회침출적재생액，종이도치계통중감화수적불평형。침대차문제，채용HCO 3??CO 32?혼합형계안염위췌취제，취소췌취제재생보취，대직접종모의오광소타고압침출액중췌취오진행연구。고찰온도、상비、접촉시간화Na 2 CO 3농도등인소대오췌취성능적영향이급잡질재췌취과정중적행위，측정유궤상적포화췌취용량병회제췌취등온선，병재차기출상진행모의천급역류췌취실험。결과표명：채용HCO 3??CO 32?혼합형계안염췌취제능유효지종오광소타침출액중선택성췌취오；상대우채용CO 32?형계안염췌취제，WO 3적췌취솔화P、As적거제솔수유소감소，단능성거후속유궤상재생보취，실현췌취공서감화수적평형；모의천급역류췌취실험결과표명，경9급역류췌취，WO 3적췌취솔체95.64%，P、As적거제솔체90%이상。
The present technology of extracting tungsten from alkaline solution using quaternary ammonium salt as extractant has problem of disequilibrium of alkali and water because the sodium hydroxide is consumed and regenerated liquid is produced in the regeneration procedure. Aiming at this problem, the direct extraction of tungsten from simulated autoclave-soda leaching liquor was researched in order to shorten the flowsheet and cancel the regeneration process by using mixed quaternary ammonium salt of bicarbonate and carbonate as extractant. The effect of various factors, such as temperature, phase ratio, contact time and Na 2 CO 3 concentration in leaching solution on the extraction of tungsten and the behaviors of impurities in the extraction were investigated. The saturated loading capacity (for WO 3 ) of organic was measured and the extraction isotherm was plotted. On this basis, the simulated counter current extraction was carried out. The results show that the mixed quaternary ammonium salt of bicarbonate and carbonate can selectively extract tungsten effectively from the autoclave-soda leaching liquor of tungsten ore. The regeneration procedure can be cancelled in the new process although both the extraction rate of WO 3 and removing rates of P and As are a little lower than those in the process using quaternary ammonium salt of carbonate as extractant. For that, the balance of soda and water in the whole extraction process is realized. The extraction rate of WO 3 is 95.64%and the removing rates of P and As are higher than 90%in the 9-stage simulated countercurrent extraction.