罗布泊地区分布着一定储量的硫酸盐型沉积盐矿，钾含量虽然不高，但仍具有开发利用的价值。对该硫酸盐型沉积盐矿进行晶体结构分析，并对矿样进行溶浸提取钾实验研究。研究结果表明：该硫酸盐型沉积盐矿主要成分为NaCl，并含有较多的硫酸盐及其复盐，如硫酸镁、芒硝、石膏、杂卤石、钾镁矾和少量光卤石等；K⁺含量为1.9%~5.3%（质量分数，下同），Mg²⁺含量为4.2%~6.9%，SO₄^2-含量为17.1%~30.2%。采用罗布泊原卤、罗布泊盐湖卤水生产硫酸钾工艺不同阶段的工艺卤水、不同的饱和盐水和去离子水进行溶浸实验，发现罗布泊原卤是溶浸该盐矿提取钾的较佳溶浸剂；溶浸剂中硫酸根含量高有利于K⁺浸出；溶浸液固比对钾浸出率影响最为显著，其次是溶浸温度，溶浸时间影响最小。罗布泊原卤溶浸较优的条件是液固比为2.0、溶浸温度为25 ℃、溶浸时间为45 min，K⁺浸出率可达87.6%，浸出液中 K⁺含量提高至原卤的2.53倍。研究结果可为硫酸盐型沉积盐矿中钾的开发利用提供理论支撑和数据支持。

The Lop Nur region hosts certain reserves of sulfate-type sedimentary salt deposits.Although its potassium content is not high，it still possesses value for development and utilization.Crystal structure analysis was conducted on this sulfate-type sedimentary salt deposits，along with experimental studies on potassium extraction via leaching.The results indicated that the ore was primarily composed of NaCl and contained substantial amounts of sulfates and their double salts，such as magnesium sulfate，mirabilite，gypsum，polyhalite，kainite，and minor carnallite.The content ranges were 1.9% to 5.3% for K⁺，4.2% to 6.9% for Mg²⁺，and 17.1% to 30.2% for SO₄²⁻（all by mass）.Leaching experiments employing raw brine from Lop Nur，process brines from different stages of potassium sulfate production using Lop Nur salt lake brine，various saturated brines，and deionized water revealed that the raw Lop Nur brine was the superior leaching agent for potassium extraction from this salt deposits.A high sulfate ion content in the leaching agent favored K⁺ dissolution.Among the leaching parameters，the liquid-to-solid ratio exerted the most significant influence on the potassium leaching rate，followed by leaching temperature，with leaching time having the least effect.The optimal leaching conditions using raw Lop Nur brine were liquid-to-solid ratio of 2.0，temperature of 25 ℃，and duration of 45 min.Under these conditions，the K⁺ leaching rate reached 87.6%，and the K⁺ content in the leachate was increased to 2.53 times that of the original brine.These findings provided theoretical support and data for the development and utilization of potassium from sulfate-type sedimentary salt deposits.