Method for decomposing and utilizing phosphate-potassium ore

Through the treatment of phosphorus and potassium ore by nitric acid, gradient acidolysis and mineralization reactions are adopted to solve the problems of waste of phosphorus and potassium ore resources and environmental pollution in the traditional wet phosphorus and potassium process, and the efficient separation and comprehensive utilization of phosphorus and potassium elements are achieved, and the economic value of phosphorus and potassium ore is improved.

CN117303324BActive Publication Date: 2025-07-25SICHUAN UNIV
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Patent Information

Application Number
CN202210722348.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-06-24
Publication Date
2025-07-25
Estimated Expiration
2042-06-24

AI Technical Summary

Technical Problem

In the prior art, traditional wet phosphoric acid process cannot effectively utilize phosphorus and potassium ore, resulting in waste of resources and environmental pollution. Vacuum filtration is prone to blockage, making it difficult to achieve efficient separation and comprehensive utilization of phosphorus and potassium elements.

Method used

Nitrate is used to treat phosphorus and potassium ore. By controlling the acidolysis reaction conditions, gradient acidolysis and mineralization reaction are used to reduce the leachate of potassium elements, and the separation of phosphorus and potassium elements is achieved, and the problem of vacuum filtration and cooling precipitation of potassium fluorosilicate blocking the filter cloth is avoided.

Benefits of technology

It achieves efficient separation of phosphorus and potassium elements, avoids the disadvantages of traditional wet phosphoric acid treatment, and has rich and environmentally friendly products, which improves the economic value of phosphorus and potassium ore.

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Abstract

The present invention relates to a method for decomposing and utilizing phosphate-potassium ore, belonging to the technical field of phosphate-potassium ore treatment. The technical problem solved by the present invention is to provide a method for decomposing and utilizing phosphate-potassium ore. The method comprises the following steps: mixing nitric acid and phosphate-potassium ore, and carrying out an acidolysis reaction; after the reaction is completed, performing solid-liquid separation to obtain a phosphorus-containing filtrate and potassium-containing acid-insoluble substances; wherein, the leaching rate of potassium in the phosphate-potassium ore is ≤3%, and the leaching rate of phosphorus is ≥96%. The present invention for the first time uses nitric acid to treat phosphate-potassium ore, controls the reaction conditions of the acidolysis process to reduce the leaching rate of K element, realizes the separation of phosphorus and potassium elements, avoids the problem that potassium fluorosilicate precipitates and clogs the filter cloth during vacuum filtration and cooling, perfectly avoids the disadvantages of the traditional wet-process phosphoric acid for treating phosphate-potassium ore, and has rich products.
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