POTASSIUM EXTRACTION FROM POTASSIUM-RICH SHALE BY HIGH PRESSURE HYDROTHERMAL METHOD
POTASSIUM EXTRACTION FROM POTASSIUM-RICH SHALE BY HIGH PRESSURE HYDROTHERMAL METHOD
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发表时间：
2008
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通讯作者：
Yin Wan-zhong
中科院分区：
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作者：
Yin Wan-zhong
采用高压水热法对富钾页岩提钾工艺进行了研究。适宜的提取条件为：CaO为添加剂，C/S（Ca / Si摩尔比）为4，浸出时间为4h，浸出温度为250℃，-0.074mm样品为90%，搅拌速率为1000r/min，液固比为11.4。钾的提取率可达95%以上。采用XRD分析了物相变化规律，确定了高压水热萃取钾的反应机理。
The process of potassium extraction from potassium-rich shale is studied by high pressure hydrothermal method.The suitable extracting conditions are as follows: CaO as addition agent,C/S(mole ratio of Ca and Si) of 4,leaching time of 4h,leaching temperature of 250℃,-0.074mm sample of 90%,stirring rate of 1000r/min,and the ratio of liquid-to-solid of 11.4.Extracting ratio of potassium of more than 95% is obtained.Variable law of Phase is analyzed by XRD,and then reaction mechanism of potassium extraction under high pressure hydrothermal system is determined.