1. Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China;
2. Kunming Gaoju Science and Technology Co., Ltd., Kunming, Yunnan 650106, China
Abstract：Coprecipitation of arsenic and iron in sulphuric acid system to produce large particle sized scorodite was carried out. The effects of initial Fe/As molar ratio, initial pH, temperature, agitation speed and oxygen partial pressure on scorodite crystalline formation, particle size distribution and the precipitation rates of As and Fe were investigated. The results showed that the decrease of Fe/As molar ratio, initial pH and temperature was beneficial to large and purified scorodite formation which was independent of oxygen partial pressure. Higher agitation speed was available for the formation of more purified scorodite but small-sized scorodite. The precipitation of As was higher than 97%, the content of arsenic in residue was larger than 30% and the average size of scorodite was larger than 20 ?m under the optimum conditions of Fe/As molar ratio 1.5, initial pH 1.0, temperature 160℃, agitation speed 500 r/min, oxygen partial pressure 0.4 MPa.
余自秀 李存兄 魏昶 樊刚 李兴彬 邓志敢 李旻廷. 砷铁水热共沉淀制备大颗粒臭葱石[J]. 过程工程学报, 2018, 18(1): 126-132.
Zixiu YU Cunxiong LI Chang WEI Gang FAN Xingbin LI Zhigan DENG Minting LI. Preparation of Large-sized Scorodite Based on Arsenic and Iron Hydrothermal Co-precipitation. Chin. J. Process Eng., 2018, 18(1): 126-132.
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2018, Vol. 18 
