摘要
通过静态水热法利用富钾岩石制取了钾-硅复合肥。同国内大多数研究小组单独从富钾岩石中提取钾需要分离等繁琐手段不同,我们采取了一种只需把反应物加热到一定温度,然后保温一定的时间后即可实现高提取率的方法,无须单独提取钾;水热合成的产物中不仅仅含钾和硅,而且也含有钙、镁、铁等元素。采用正交实验确定了不同温度区间内和同一温度条件下的最优化条件;通过正交结果分析表明,影响富钾岩石中钾和硅的溶出率最主要的因素是温度,其次是时间,石灰富钾岩石比以及水固比的影响相对较小。
We focused on preparing K-Si compound fertilizer from potassium-rich rock by static hydrothermal reaction in this paper. We didn＇t need extracting K solely and could easily get the product after the reactants were heated and kept the high temperature for certain time, which was different from other research groups who solely extracted K from potassium-rich rock and got the K product after separating K from other elements. Furthermore our products contained not only K and Si, but also Ca, Mg and Ft. Using the orthogonal experiment, we optimized the experiment conditions during different temperature ranges and on same temperature. By analyzing the data of the orthogonal experiment, we can conclude that the primary factor is temperature that affects the dissolution rate of K and Si in potassium-rich rock： and the next one is time. Compared to temperature and time, the ratio between lime and potassium-rich rock and the ratio between water and reactant solid have less effect on the dissolution rate of K and Si.
出处
《非金属矿》
CAS
CSCD
北大核心
2008年第5期28-31,共4页
Non-Metallic Mines
基金
国家科技支撑计划(2006BAD10B04)
北京市科技计划产业化类项目
中国科学院知识创新工程重要方向项目
国家级星火计划重点项目(2007EA173003)联合资助
关键词
静态水热法
富钾岩石
正交实验
溶出率
static hydrothermal reaction potassium-rich rock orthogonal experiment dissolution rate
