Simulation study on the mining conditions of dissolution of low grade solid potash ore in Qarhan Salt Lake

Abstract The output and grade of liquid potash minerals in Qarhan Salt Lake are decreasing year by year, which has become the main problem restricting the sustainable production of potassium fertilizer. The exploitation and utilization of low-grade solid potash ore, which is in the strata of the Qar...

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Autores principales:	Ruiqin Li, Chenglin Liu, Pengcheng Jiao, Yufei Hu, Wanping Liu, Shijun Wang
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/efe8a94cb9f7470faead38e42e84ee3a
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spelling	oai:doaj.org-article:efe8a94cb9f7470faead38e42e84ee3a2021-12-02T16:51:09ZSimulation study on the mining conditions of dissolution of low grade solid potash ore in Qarhan Salt Lake10.1038/s41598-021-88818-z2045-2322https://doaj.org/article/efe8a94cb9f7470faead38e42e84ee3a2021-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-88818-zhttps://doaj.org/toc/2045-2322Abstract The output and grade of liquid potash minerals in Qarhan Salt Lake are decreasing year by year, which has become the main problem restricting the sustainable production of potassium fertilizer. The exploitation and utilization of low-grade solid potash ore, which is in the strata of the Qarhan Salt Lake, represents the fundamental framework for the sustainable development of Qarhan Salt Lake’s potash fertilizer. PHREEQC is a simulation software for hydrogeochemistry. In this paper, PHREEQC was applied to simulate temperature, pH value and solvent chemical characteristics which affect the dissolution process of low-grade solid potash minerals. The simulation results indicate that the optimum temperature for ore dissolution is around 25 °C, because, around this temperature, the dissolving ability of solvents to low-grade solid potash minerals is enhanced, while the dissolving ability to halite remains basically unchanged, which is conducive to selective dissolution of low-grade solid potash. It is recommended the temperature is between 20 and 30 ℃. The simulation results show that, when the pH value of solvents is more than 9, although it is advantageous to selective dissolution of low-grade solid potash minerals, the solvent becomes strong alkali solution, which will cause environmental pollution and seriously corrode materials and equipment in actual production, so it is recommended the pH value of the solvent is adjusted between 6 and 8. The simulation results show that, when the values of K+, Na+, Mg2+, Ca2+, Cl− and SO4 2− in the solvent are 0.1%, 2.9%, 3.77%, 0.05%, 15.72% and 0.13% respectively, the solubility of low-grade solid potash ores is stronger, which is more conducive to selective ore dissolution. It is suggested that in actual production, the chemical composition of solvents prepared with old brine and fresh water should be as close as possible to the above chemical composition characteristics.Ruiqin LiChenglin LiuPengcheng JiaoYufei HuWanping LiuShijun WangNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ruiqin Li Chenglin Liu Pengcheng Jiao Yufei Hu Wanping Liu Shijun Wang Simulation study on the mining conditions of dissolution of low grade solid potash ore in Qarhan Salt Lake
description	Abstract The output and grade of liquid potash minerals in Qarhan Salt Lake are decreasing year by year, which has become the main problem restricting the sustainable production of potassium fertilizer. The exploitation and utilization of low-grade solid potash ore, which is in the strata of the Qarhan Salt Lake, represents the fundamental framework for the sustainable development of Qarhan Salt Lake’s potash fertilizer. PHREEQC is a simulation software for hydrogeochemistry. In this paper, PHREEQC was applied to simulate temperature, pH value and solvent chemical characteristics which affect the dissolution process of low-grade solid potash minerals. The simulation results indicate that the optimum temperature for ore dissolution is around 25 °C, because, around this temperature, the dissolving ability of solvents to low-grade solid potash minerals is enhanced, while the dissolving ability to halite remains basically unchanged, which is conducive to selective dissolution of low-grade solid potash. It is recommended the temperature is between 20 and 30 ℃. The simulation results show that, when the pH value of solvents is more than 9, although it is advantageous to selective dissolution of low-grade solid potash minerals, the solvent becomes strong alkali solution, which will cause environmental pollution and seriously corrode materials and equipment in actual production, so it is recommended the pH value of the solvent is adjusted between 6 and 8. The simulation results show that, when the values of K+, Na+, Mg2+, Ca2+, Cl− and SO4 2− in the solvent are 0.1%, 2.9%, 3.77%, 0.05%, 15.72% and 0.13% respectively, the solubility of low-grade solid potash ores is stronger, which is more conducive to selective ore dissolution. It is suggested that in actual production, the chemical composition of solvents prepared with old brine and fresh water should be as close as possible to the above chemical composition characteristics.
format	article
author	Ruiqin Li Chenglin Liu Pengcheng Jiao Yufei Hu Wanping Liu Shijun Wang
author_facet	Ruiqin Li Chenglin Liu Pengcheng Jiao Yufei Hu Wanping Liu Shijun Wang
author_sort	Ruiqin Li
title	Simulation study on the mining conditions of dissolution of low grade solid potash ore in Qarhan Salt Lake
title_short	Simulation study on the mining conditions of dissolution of low grade solid potash ore in Qarhan Salt Lake
title_full	Simulation study on the mining conditions of dissolution of low grade solid potash ore in Qarhan Salt Lake
title_fullStr	Simulation study on the mining conditions of dissolution of low grade solid potash ore in Qarhan Salt Lake
title_full_unstemmed	Simulation study on the mining conditions of dissolution of low grade solid potash ore in Qarhan Salt Lake
title_sort	simulation study on the mining conditions of dissolution of low grade solid potash ore in qarhan salt lake
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/efe8a94cb9f7470faead38e42e84ee3a
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_version_	1718383014405210112

Simulation study on the mining conditions of dissolution of low grade solid potash ore in Qarhan Salt Lake

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