Integrated Technology for Processing of Apatite Concentrate

IF 0.7 4区 工程技术 Q4 ENGINEERING, CHEMICAL Theoretical Foundations of Chemical Engineering Pub Date : 2024-01-17 DOI:10.1134/S0040579523050172
E. P. Lokshin, O. A. Tareeva
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Abstract

A technology is proposed for processing of apatite concentrates by decomposition by phosphoric acid at 20°C in the presence of a sulfonic cation-exchange resin, defluorination of the obtained phosphoric acid, desorption of the sorbed cations with concentrated solutions of alkali metal salts, sequential hydrolytic precipitation of the thorium-enriched impurity cake and nonradioactive concentrate of carbonates of rare-earth and alkaline-earth elements, and regeneration of the sulfonic cation cation-exchange resin from the Na+ form to the H+ form. It is shown that the technology is also applicable for the processing of apatite concentrate with a high content of rare-earth elements and strontium. The technology ensures the recovery of all valuable components into commercial products while minimizing the consumption of reagents and energy, the amount of generated waste, and the environmental pollution.

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加工磷灰石精矿的集成技术
提出了一种处理磷灰石精矿的技术,即在 20°C 下,在磺酸阳离子交换树脂的存在下,用磷酸进行分解,对得到的磷酸进行脱氟处理,用碱金属盐的浓溶液对吸附的阳离子进行解吸、依次水解沉淀富含钍的杂质滤饼以及稀土和碱土元素碳酸盐的非放射性浓缩物,并将磺酸阳离子交换树脂从 Na+ 形式再生为 H+ 形式。实验表明,该技术也适用于处理稀土元素和锶含量较高的磷灰石精矿。该技术可确保将所有有价值的成分回收到商业产品中,同时将试剂和能源消耗、产生的废物量以及环境污染降至最低。
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来源期刊
CiteScore
1.20
自引率
25.00%
发文量
70
审稿时长
24 months
期刊介绍: Theoretical Foundations of Chemical Engineering is a comprehensive journal covering all aspects of theoretical and applied research in chemical engineering, including transport phenomena; surface phenomena; processes of mixture separation; theory and methods of chemical reactor design; combined processes and multifunctional reactors; hydromechanic, thermal, diffusion, and chemical processes and apparatus, membrane processes and reactors; biotechnology; dispersed systems; nanotechnologies; process intensification; information modeling and analysis; energy- and resource-saving processes; environmentally clean processes and technologies.
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