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Leaching kinetics of electric arc furnace dust in nitric acid solutions
International Journal of Chemical Kinetics ( IF 1.5 ) Pub Date : 2020-08-07 , DOI: 10.1002/kin.21411
Mert Zoraga 1 , Sedat Ilhan 1 , Ahmet Orkun Kalpakli 1
Affiliation  

Electric arc furnace dust contains mainly ZnO, ZnFe2O4, and iron oxides. In this study, chemical composition of ZnO, ZnFe2O4, and Fe2O3 and leaching kinetics of ZnO, ZnFe2O4, and Fe2O3 in HNO3 solutions were investigated. It was seen that the dissolution of ZnO is very fast, therefore the leaching kinetics of ZnO cannot be determined. Kinetic parameters and model equations were derived for the leaching of ZnFe2O4 and Fe2O3. Leaching kinetics of ZnFe2O4 was explained by the pseudohomogeneous reaction model. Activation energy and order of HNO3 concentration were found to be as 37.5 kJ mol−1 and 0.37, respectively. The model equation was derived as urn:x-wiley:05388066:media:kin21411:kin21411-math-0001. It was determined that experimental data for the leaching kinetics of Fe2O3 best fit with the shrinking core model (SCM). Activation energy and order of HNO3 concentration were found to be as 51.5 kJ mol−1 and 0.67, respectively The model equation was derived using SCM as urn:x-wiley:05388066:media:kin21411:kin21411-math-0002.

中文翻译:

硝酸溶液中电弧炉粉尘的浸出动力学

电弧炉粉尘主要包含ZnO,ZnFe 2 O 4和氧化铁。在这项研究中,氧化锌的化学组成,的ZnFe 2 Ò 4和Fe 2 ö 3和ZnO的浸出动力学,的ZnFe 2 Ò 4和Fe 2 ö 3在HNO 3种溶液进行了研究。可以看出,ZnO的溶解非常快,因此不能确定ZnO的浸出动力学。推导了ZnFe 2 O 4和Fe 2 O 3浸出的动力学参数和模型方程2 O 4由假均相反应模型解释。发现活化能和HNO 3浓度的阶数分别为37.5kJ mol -1和0.37。模型方程为骨灰盒:x-wiley:05388066:media:kin21411:kin21411-math-0001。已确定,Fe 2 O 3浸出动力学的实验数据与收缩核模型(SCM)最为吻合。发现HNO 3的活化能和浓度顺序分别为51.5 kJ mol -1和0.67 骨灰盒:x-wiley:05388066:media:kin21411:kin21411-math-0002
更新日期:2020-08-07
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