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A method for efficiently leaching k, ca, mg, p from phosphorus and potassium associated ore by using extraction agent and hydrochloric acid acid hydrolysis technology

A phosphorus and potassium associated ore and extraction agent technology, applied in the industrial field, can solve the problems of hindering the acidolysis process, long reaction time, high reaction temperature, etc., and achieve the effects of reducing reaction time, alleviating corrosion hazards, reducing reaction temperature and

Active Publication Date: 2017-12-19
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the presence of phosphorus in the associated ore of phosphorus and potassium, phosphoric acid is generated under the acidic conditions of hydrochloric acid, and then insoluble orthophosphate is produced to wrap or cover the surface of the ore particles, which hinders the progress of the acidolysis process, resulting in even in the presence of fluorine. In the presence of auxiliary agents such as chemical salts, the use of hydrochloric acid to hydrolyze phosphorus and potassium associated ores can only obtain P, K, Ca and Mg with low yields, and the reaction temperature is relatively high and the reaction time is long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for efficiently leaching K, Ca, Mg, P from phosphorus and potassium associated ore by using extraction agent and hydrochloric acid acid hydrolysis technology, comprising the steps of: weighing 20g of phosphorus and potassium associated ore, CaF 2 1.8g, 22.5% (mass concentration) HCl 68ml, tributyl phosphate 2ml, put into a three-necked flask in turn, heat up, start stirring, react at 75°C for 4h, wash and filter with water, and obtain a leaching solution containing K, Ca, Mg, P .

[0021] Determination of K in the leaching solution by atomic absorption spectrometry + , Ca 2+ , Mg 2+ content, using the ammonium molybdate titration method to determine the H in the leach solution 3 PO 4 The content of calculated and obtained employing the present embodiment method to process phosphorus-potassium associated ore, wherein the leaching rate of phosphorus reaches 98.3%; The leaching rate of potassium is 96.2%; The leaching rate of Ca is 97.5%; The leaching rate of...

Embodiment 2

[0023] A method for efficiently leaching K, Ca, Mg, P from phosphorus and potassium associated ore by using extraction agent and hydrochloric acid acid hydrolysis technology, comprising the steps of: weighing 20g of phosphorus and potassium associated ore, CaF 2 3.0g, 30% (mass concentration) HCl 52ml, n-heptanol 2.5ml, put into a three-necked flask in turn, heat up, start stirring, react at 80°C for 3h, wash and filter with water, and obtain a leaching solution containing K, Ca, Mg, P .

[0024] Determination of K in the leaching solution by atomic absorption spectrometry + , Ca 2+ , Mg 2+ content, using the ammonium molybdate titration method to determine the H in the leach solution 3 PO 4 The content of calculated and obtained employing the present embodiment method to process phosphorus and potassium associated ore, wherein the leaching rate of phosphorus reaches 99.1%; The leaching rate of potassium is 98.5%; The leaching rate of Ca is 98.4%; The leaching rate of Mg ...

Embodiment 3

[0026] A method for efficiently leaching K, Ca, Mg, P from phosphorus and potassium associated ore by using extraction agent and hydrochloric acid acid hydrolysis technology, comprising the steps of: weighing 20g of phosphorus and potassium associated ore, CaF 2 1.2g, 65ml of 27% HCl (mass concentration), 2.5ml of polyether polyol MN-1000, put them into a three-necked flask in turn, raise the temperature, start stirring, react at 70°C for 4h, wash and filter with water, and obtain K, Ca, Mg, P Leaching solution.

[0027] Determination of K in the leaching solution by atomic absorption spectrometry + , Ca 2+ , Mg 2+ content, using the ammonium molybdate titration method to determine the H in the leach solution 3 PO 4 The content of calculated and obtained employing the present embodiment method to process phosphorus and potassium associated ore, wherein the leaching rate of phosphorus reaches 99.5%; The leaching rate of potassium is 97.8%; The leaching rate of Ca is 99.3%;...

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Abstract

The invention belongs to the field of industry, in particular to a method using extraction agent and a hydrochloric acid acidolysis technology to efficiently leach K, Ca, Mg and P from P and K associated ore. Specifically, the method comprises: mixing the P and K associated ore, fluoride, extraction agent and a hydrochloric acid solution; under stirring, heating to perform coupling reaction in which phosphoric acid extracting and P and K associated ore acidolysis are performed synchronously, after action is finished, naturally cooling, and after filtering, obtaining an extraction solution containing K, Ca, Mg and P. The phosphoric acid extracting process and P and K associated ore acidolysis process by adding fluoride are coupled, K, Ca, Mg and P can be efficiently leached from the P and K associated ore, and the leaching rate of the K, Ca, Mg and P is greatly improved; reaction temperature and reaction time are effectively reduced and the corrosion hazard to the device caused by acidolysis of the P and K associated ore is effectively reduced.

Description

technical field [0001] The invention belongs to the industrial field, and in particular relates to a method for efficiently leaching K, Ca, Mg and P from phosphorus and potassium associated ores by using an extractant and hydrochloric acid acid hydrolysis technology. Background technique [0002] Nitrogen, phosphorus and potassium are the three elements that ensure the normal growth of crops and play a vital role in the development of agriculture in my country. Nitrogen fertilizers are generally obtained by synthetic ammonia technology. However, my country is extremely short of potassium and phosphate fertilizers, especially potassium fertilizers. Except for the large amount of soluble potassium reserves in the Qinghai Lake area of ​​my country, there is basically no large amount of soluble potassium ore in other places. Phosphate rocks in most areas of our country belong to medium and low-grade phosphate rocks or phosphate-potassium paragenetic ores, and the processing of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B26/10C22B26/22C01B25/22
CPCC01B25/2212C22B26/10C22B26/22
Inventor 王存文周俊锋刘存成马家玉覃远航吕仁亮汪铁林王为国陈苏芳冯魏良唐正姣张俊峰吴元欣
Owner WUHAN INSTITUTE OF TECHNOLOGY