The leaching of the major mineral (potassium alunite) from alunite ores with a potassium hydroxide solution is studied. The process occurs with the retention of other minerals (dickite, hematite, quartz) in the leaching residues. The kinetics of leaching of potassium alunite from alunite raw materials is studied by the powder dissolution method in the temperature range of a potassium hydroxide solution 333–368 K at a KOH concentration of 52.96–243.8 g/L. The activation energy of the process is calculated using the experimental results obtained ( E _a = 73.14 kJ/mol). The calculated energy indicates that the leaching of alunite from alunite ores is controlled by a surface chemical reaction, and the reaction order with respect to KOH is 1.02. The process under study is described by a first-order kinetic equation.

中文翻译：

---

碱溶液中铝矾土中铝矾土溶解的动力学规律

研究了用氢氧化钾溶液浸提钠矾石矿石中的主要矿物（亚矾酸钾）。浸出残渣中会保留其他矿物（迪克石，赤铁矿，石英）。通过粉体溶解法研究了在KOH浓度为52.96-243.8 g / L的氢氧化钾溶液333-368 K的温度范围内从亚铝石原料中浸出亚铝酸钾的动力学。使用获得的实验结果计算过程的活化能（ E _a= 73.14 kJ / mol）。计算出的能量表明，通过表面化学反应控制了从亚铝石矿石中浸出亚铝石，并且相对于KOH的反应顺序为1.02。研究过程由一阶动力学方程式描述。