(昆明理工大學(xué) 冶金與能源工程學(xué)院，昆明 650093)
摘 要: 通過(guò)研究FeSO4-ZnSO4-MgSO4-H2SO4體系中鋅、鐵、鎂的結(jié)晶行為，考察不同硫酸鹽濃度下溫度對(duì)硫酸亞鐵、硫酸鋅和硫酸鎂結(jié)晶的影響。結(jié)果表明：隨著溫度的升高，硫酸亞鐵、硫酸鋅和硫酸鎂的溶解度降低；改變初始溶液中亞鐵離子的濃度，硫酸亞鐵的急劇降低區(qū)間(160~180 ℃)保持不變；硫酸鋅和硫酸亞鐵的存在提高了硫酸鎂的結(jié)晶率；硫酸鎂和硫酸亞鐵的存在提高硫酸鋅的結(jié)晶率；低于160 ℃時(shí)，硫酸鋅和硫酸鎂的存在提高了硫酸亞鐵結(jié)晶率，高于170 ℃時(shí)，硫酸鋅和硫酸鎂的存在降低硫酸亞鐵結(jié)晶率。
關(guān)鍵字: 硫酸亞鐵；硫酸鋅；硫酸鎂；溶解度；結(jié)晶；溫度
（Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China）
Abstract:The effects of different sulfate concentrations on the crystallization of ferrous sulfate, zinc sulfate and magnesium sulfate were investigated through investigating the crystallization behavior of zinc, iron and magnesium in FeSO4-ZnSO4-MgSO4-H2SO4 system. The results show that the solubility of ferrous sulfate, zinc sulfate and magnesium sulfate decreases with the increase of temperature. When the concentration of ferrous ions in the initial solution is changed, the sharp decrease interval of ferrous sulfate (160-180 ℃) remains unchanged. The presence of zinc sulfate and ferrous sulfate increases the crystallization rate of magnesium sulfate, the presence of magnesium sulfate and ferrous sulfate increases the crystallization rate of zinc sulfate. When the temperature is lower than 160 ℃, the presence of zinc sulfate and magnesium sulfate increases the crystallization rate of ferrous sulfate, when the temperature is higher than 170 ℃, it decreases the crystallization rate of ferrous sulfate.
Key words: ferrous sulfate; zinc sulphate; magnesium sulfate; solubility; crystallization; temperature
