CAJ | 학술논문

提出NaOH分解含铟铁矾渣新工艺,考察NaOH用量、液固比、温度和时间对铁矾渣分解率的影响,并讨论铁矾渣中杂质金属,如Zn、In、Cu、Cd、Pb、As、Sb、Sn和Ag等在NaOH分解过程中的行为.结果表明:在m(NaOH)-m(铁矾渣)=0.381 4-1、温度60 ℃、液固比2-1、反应时间2 h的最优条件下,铁矾渣的分解率达到98.03%,而原料中的杂质金属,如Sn、Sb、Zn、In、Cu、Cd、Pb和Ag等绝大部分留在分解渣中,As则以AsO43-的形态大部分进入溶液,浸出率达到83.36%.DSC-TGA热分析和X射线衍射分析结果表明:在NaOH分解过程中,铁矾渣中的铁主要以Fe3O4形式沉淀入渣;分解渣中Fe、In和Zn的含量分别为38.81%、0.23%和12.89%;经稀盐酸选择性浸出铟和锌后,进一步磁选富集可作为炼铁原料.
제출NaOH분해함인철반사신공예,고찰NaOH용량、액고비、온도화시간대철반사분해솔적영향,병토론철반사중잡질금속,여Zn、In、Cu、Cd、Pb、As、Sb、Sn화Ag등재NaOH분해과정중적행위.결과표명:재m(NaOH)-m(철반사)=0.381 4-1、온도60 ℃、액고비2-1、반응시간2 h적최우조건하,철반사적분해솔체도98.03%,이원료중적잡질금속,여Sn、Sb、Zn、In、Cu、Cd、Pb화Ag등절대부분류재분해사중,As칙이AsO43-적형태대부분진입용액,침출솔체도83.36%.DSC-TGA열분석화X사선연사분석결과표명:재NaOH분해과정중,철반사중적철주요이Fe3O4형식침정입사;분해사중Fe、In화Zn적함량분별위38.81%、0.23%화12.89%;경희염산선택성침출인화자후,진일보자선부집가작위련철원료.
The decomposition of ammonium jarosite bearing indium in NaOH medium were studied. The effects of NaOH addition, liquid-solid ratio, decomposition temperature and time on the decomposition ratio of ammonium jarosite were investigated, respectively, and the behavior of impurity elements, such as Zn, In, Cu, Cd, Pb, As, Sb, Sn and Ag in jarosite residues was also discussed. The results show that the decomposition rate of ammonium jarosite can reach 98.03% under the following optimum conditions, which are m(NaOH)-m(jarosite)=0.381 4-1, temperature 60 ℃, liquid-solid ratio 2-1, reaction time 2 h. During the alkaline decomposition, the impurity elements, such as Zn, In, Cu, Cd, Pb, Sb, Sn and Ag are left in the residue, while As is leached into the pregnant solution as AsO43- with leaching rate of 83.36%. DSC-TGA thermal analysis and XRD characterization results demonstrate that Fe is precipitated as Fe3O4 during alkaline decomposition of jarosite. The contents of Fe, In and Zn in decomposition residue are 38.81%, 0.23% and 12.89%, respectively. After selective leaching of In and Zn with dilute HCl solution, the iron concentrates obtained from magnetic separation can be used as raw material for iron smelting.