【作者】 王彩丽； 郑水林； 王怀法；

【Author】 WANG Cai-li~1,ZHENG Shui-lin~2,WANG Huai-fa~1 (1.College of Mining Technology,Tai Yuan University of Technology,Tai Yuan,030024,China;2.School of Chemical and Environmental Engineering,China University of Mining and Technology,Beijing 100083,China)

【机构】 太原理工大学矿业工程学院； 中国矿业大学化学与环境工程学院；

【摘要】 以硅灰石为原料,硫酸铝和硅酸钠为包覆剂,采用非均匀成核法,制备了一种硅酸铝-硅灰石复合粉体材料1研究了搅拌速度、反应温度、反应时间、硫酸铝溶液浓度和滴加速度等工艺条件对复合粉体制备的影响。结果表明:控制机械搅拌速度300～400r/min、反应温度80℃、反应时间30min、硫酸铝溶液浓度0.1mol/L、滴加速度1～2ml/min,可以实现硅酸铝以非均匀成核形式沉积在硅灰石表面,包覆硅酸铝后硅灰石白度提高,粒度增大,比表面积提高200%以上。更多还原

【Abstract】 Taking wollastonite as raw material,aluminium sulfate and water glass as coating modifier,a new type aluminium silicate-wollastonite composite was obtained by heterogeneous deposition method.The processing parameters such as stiring speed, reaction temperature,reaction time,aluminium sulfate concentration and instill speed on the effect of composite powder were investigated.It is shown that aluminium silicate can successfully deposite on the surface of wollastonite by controlling stiring speed 300～400r/min,reaction temperature 80℃,reaction time 30min,aluminium sulfate concentration 0.1mol/L and instill speed 1～2ml/min, the whiteness of wollastonite increases,the particle sizes grow bigger and the specific surface area increases 200%after coated with aluminium silicate.更多还原