【作者】 张盼； 马鸿文；

【Author】 Zhang Pan , Ma Hongwen (National Laboratory of Mineral Materials, China University of Geosciences Beijing 100083)

【机构】 中国地质大学矿物材料国家专业实验室；

【摘要】 以氧化钙为助剂,在200~250℃的水热反应条件下分解钾长石,研究了在不同的Ca／Al+Si、水固比、反应温度和反应时间下,钾长石中氧化钾的溶出率和固相的物相变化。结果表明,在温度为230～ 250℃,Ca／Al+Si=0．83～1．00,水固比=20,反应时间为8h的条件下,氧化钾的溶出率>80％,固相反应产物为结晶良好的针状雪硅钙石晶体。更多还原

【Abstract】 At 200~250℃, on hydrothermal-dissolving potassium feldspar with CaO as additive, in the condition of different Ca/Al+Si atom ratios, liquid/solid weight ratios, reaction temperature and reaction time, the dissolving rate of K2O from potassium feldspar and phases transformation in the solid were investigated. The experimental results indicated that the dissolving rate of K2O from potassium feldspar is over 80% and the solid product is well-crystallized needle-like tobermorite at the condition of reaction temperature: 230~250℃, Ca/Al+Si atom ratios: 0.83-1.00, liquid/solid weight ratios: 20, reaction time: 8h.更多还原