本文選題：鋯冶金廢渣　切入點(diǎn)：鋯回收　出處：《稀有金屬》2017年07期

【摘要】：通過(guò)鹽酸酸浸鋯冶金廢渣回收堿熔過(guò)程中已發(fā)生分解的鋯,分析了鹽酸濃度、酸浸溫度、液固比等工藝參數(shù)對(duì)堿熔過(guò)程中已發(fā)生分解的鋯回收率的影響,并對(duì)鋯冶金廢渣中的物相組成、回收前后鋯元素在鋯冶金廢渣中存在的形態(tài)以及對(duì)鋯元素的回收工藝流程進(jìn)行了研究。結(jié)果表明:鹽酸濃度、酸浸溫度是影響鋯回收率的主要因素。鋯冶金廢渣中已分解鋯的回收率隨著鹽酸濃度的增大而增大,當(dāng)鹽酸濃度由2mol·L~(-1)增大到4 mol·L~(-1)時(shí),鋯的回收率增幅僅為4.02%。鋯冶金廢渣中已分解鋯的回收率隨著溫度的升高而升高,當(dāng)酸浸溫度超過(guò)50℃后,鋯冶金廢渣中已分解鋯的回收率已無(wú)明顯的增長(zhǎng)。鋯冶金廢渣中鋯元素主要以ZrSiO_4,ZrOCl_2兩種形式存在,鹽酸酸浸鋯冶金廢渣可實(shí)現(xiàn)對(duì)ZrOCl_2的回收。最佳的工藝條件為:鹽酸濃度2 mol·L~(-1),酸浸溫度50℃,液固比5∶1。在此條件下,堿熔過(guò)程中已發(fā)生分解的鋯的回收率可達(dá)到62%。
[Abstract]:The effects of hydrochloric acid concentration, acid leaching temperature and liquid-solid ratio on the recovery rate of zirconium decomposed in alkali melting process were analyzed by acid leaching zirconium hydrochloric acid metallurgical waste residue. The phase composition of zirconium metallurgical waste residue, the morphology of zirconium element in zirconium metallurgical waste slag before and after recovery and the recovery process of zirconium element were studied. The results showed that the concentration of hydrochloric acid was the same as that of hydrochloric acid. Acid leaching temperature is the main factor affecting the recovery of zirconium. The recovery rate of decomposed zirconium in zirconium metallurgical residue increases with the increase of hydrochloric acid concentration, when the concentration of hydrochloric acid is increased from 2mol L ~ (-1) to 4 mol / L ~ (-1). The recovery rate of zirconium increased only by 4.02%. The recovery rate of decomposed zirconium in zirconium metallurgical waste residue increased with the increase of temperature, when the acid leaching temperature exceeded 50 鈩，

本文編號(hào)：1663024