Method for producing phosphate concentrate from calcareous collophanite and by-producing gypsum whiskers and magnesium ammonium phosphate

A technology for by-product gypsum and magnesium ammonium phosphate, which is applied in the field of waste resource utilization, can solve the problems of low product added value and low utilization rate of collophosphate rock, so as to increase added value, improve phosphorus taste, and simplify the process. Effect

Pending Publication Date: 2020-08-04
WUHAN INSTITUTE OF TECHNOLOGY
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  • Claims
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Problems solved by technology

[0006] In view of this, the present invention aims to propose a method for producing phosphate concentrate from calcareous collophosite and by-producting gypsum whiskers and magnesium ammonium phosphate, so as to solve the problem of low resource utilization rate of existing collophosite and the low value-added of products. low problem

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  • Method for producing phosphate concentrate from calcareous collophanite and by-producing gypsum whiskers and magnesium ammonium phosphate

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Effect test

Embodiment 1

[0035] combine figure 1 As shown, the method for producing phosphate concentrate and by-product gypsum whiskers and magnesium ammonium phosphate from calcareous collophosphine of the present embodiment specifically includes the following steps:

[0036] 1) Take 500g of calcareous collophosphine and place it in the flotation machine, add 800ml of water and stir it evenly to obtain the ore pulp; add 8kg / t of sulfuric acid, 5kg / t of phosphoric acid, and 0.8kg / t of the pulp in the flotation machine in sequence After the addition of the sulfo fatty acid collector, stir for 5 minutes, then ventilate and scrape for 10 minutes to carry out reverse flotation, then drain the concentrate product and tailings product to obtain phosphorous concentrate and calcium-magnesium-rich ore. Phosphate concentrate can be used to produce phosphoric acid;

[0037] 2) Put the calcium-magnesium-rich ore obtained in step 1) into a 1000ml three-neck flask, add 195ml of hydrochloric acid with a mass fract...

Embodiment 2

[0044] combine figure 1 As shown, the method for producing phosphate concentrate and by-product gypsum whiskers and magnesium ammonium phosphate from calcareous collophosphine of the present embodiment specifically includes the following steps:

[0045] 1) Take 500g of calcareous collophosphine and place it in the flotation machine, add 850ml of water and stir it evenly to obtain the pulp; add 7kg / t of sulfuric acid, 6kg / t of phosphoric acid, and 2.2kg / t of the pulp in the flotation machine in sequence t sulfo fatty acid collector, after adding, stir for 5 minutes, then, ventilate and scrape bubbles for 12 minutes, carry out reverse flotation, then, the concentrate product and tailings product are drained to obtain phosphorus concentrate and calcium-magnesium-rich ore, phosphorus Concentrates are used to produce phosphoric acid;

[0046] 2) Put the calcium-magnesium-rich ore obtained in step 1) into a 1000ml three-necked flask, add 186ml of hydrochloric acid with a mass fract...

Embodiment 3

[0053] combine figure 1 As shown, the method for producing phosphate concentrate and by-product gypsum whiskers and magnesium ammonium phosphate from calcareous collophosphine of the present embodiment specifically includes the following steps:

[0054] 1) Take 500g of calcareous collophosphine and place it in the flotation machine, add 900ml of water and stir it evenly to obtain a pulp; add 9kg / t of sulfuric acid, 7kg / t of phosphoric acid, and 3.5kg / t of the pulp in the flotation machine in sequence After the addition of the sulfo fatty acid collector, stir for 10 minutes, then blow and bubble with air for 8 minutes, and carry out reverse flotation. Concentrates are used to produce phosphoric acid;

[0055] 2) Put the calcium-magnesium-rich ore obtained in step 1) into a 1000ml three-necked flask, add 202ml of hydrochloric acid with a mass fraction of 30.0% (10.18mol / L), and perform acidolysis reaction at 60°C for 20min, then heat-preserve and filter at 60°C to obtain decomp...

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Abstract

The invention provides a method for producing phosphate concentrate from calcareous collophanite and by-producing gypsum whiskers and magnesium ammonium phosphate, and the method comprises the following steps: separating the phosphate concentrate and calcium-rich and magnesium-rich tailings from the calcareous collophanite by flotation, and carrying out acidolysis on the calcium-rich and magnesium-rich tailings to extract available valuable elements in the tailings, thereby obtaining the gypsum whiskers and the ammonium magnesium phosphate product. The method comprises the following steps: firstly, carrying out flotation on the calcareous collophanite; comprehensively utilizing calcium, magnesium and phosphorus elements in the tailings obtained by flotation; the phosphorus taste of the collophanite is improved, the collophanite can be directly used for wet-process phosphoric acid production, meanwhile, a series of problems generated by the tailings are solved, the added value of the collophanite is increased, the negative influence on the environment is reduced, and a very good guiding effect is provided for development and utilization of the collophanite.

Description

technical field [0001] The invention relates to the technical field of waste resource utilization, in particular to a method for producing phosphate concentrate from calcareous collophosite and by-producting gypsum whiskers and magnesium ammonium phosphate. Background technique [0002] my country is rich in phosphate rock resources, and its reserves rank second in the world. However, there are few rich ore and many lean ore. Most of them are medium and low-grade calcareous collophosphine. Mineral symbiosis is tight, and the embedded particle size is fine, which belongs to refractory phosphate rock. Therefore, the development and utilization of the low- and medium-grade gliphosphite has become an urgent problem to be solved to ensure the sustainable development of resources. [0003] Until the beginning of the 19th century, manual selection was always the main method of mineral processing. Later, with the increase of labor costs and the improvement of other mineral processin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/01C01B25/45C30B7/14C30B29/46C30B29/62C01C1/16C05G1/00
CPCC01B25/01C01B25/451C30B29/46C30B29/62C30B7/14C01C1/164C05G1/00
Inventor 张华丽潘益潘志权
Owner WUHAN INSTITUTE OF TECHNOLOGY
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