Leaching studies of magnesite obtained from Tamilnadu Magnesite Limited, Salem, have been carried out using hydrochloric acid leaching and percentage of magnesium chloride recovered was estimated. The variables considered in this study were the following: duration of leaching, volume percentage of hydrochloric acid, temperature, and pulp density. Percentage recovery of magnesium chloride increased with duration of the leaching, volume % of concentrated hydrochloric acid, and temperature. Percentage recovery of magnesium chloride decreased with increase of pulp density. The optimum conditions found to be pulp density (10%), hydrochloric acid concentration (30%), duration of leaching (2 h), and temperature (348.15 K). Iron was removed by treating the leach liquor with hydrogen peroxide and by raising the pH to 3.5–4. The purified leach liquor was subjected to spray drying for producing high pure magnesium chloride.

使用盐酸浸出对从塞勒姆的 Tamilnadu Magnesite Limited 获得的菱镁矿进行了浸出研究，并估计了回收的氯化镁百分比。本研究中考虑的变量如下：浸出持续时间、盐酸体积百分比、温度和纸浆密度。氯化镁的回收百分比随着浸出时间、浓盐酸的体积百分比和温度而增加。氯化镁的回收率随着纸浆密度的增加而降低。发现的最佳条件是纸浆密度 (10%)、盐酸浓度 (30%)、浸出时间 (2 h) 和温度 (348.15 K)。通过用过氧化氢处理浸出液并将 pH 值提高到 3.5-4 来去除铁。