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Method for producing phosphate concentrate and by-producing alpha-hemihydrate gypsum and magnesium carbonate from calcareous collophanite

A technology of hemihydrate gypsum and collophosite, which is applied in the field of resource utilization of waste, can solve the problems of low added value of products and low utilization rate of collophosite resources, and achieve the goal of increasing added value, convenient operation and short process Effect

Active Publication Date: 2020-07-28
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 and by-product α-hemihydrate gypsum and magnesium carbonate from calcareous collophosite, so as to solve the problem of low resource utilization rate of existing collophosite and additional product additions. low value problem

Method used

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  • Method for producing phosphate concentrate and by-producing alpha-hemihydrate gypsum and magnesium carbonate from calcareous collophanite

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Effect test

Embodiment 1

[0034] combine figure 1 As shown, the method for producing phosphate concentrate and byproduct α-hemihydrate gypsum and magnesium carbonate from the calcareous collophosphine of the present embodiment specifically includes the following steps:

[0035] 1) Take 500g of calcareous colloidal phosphate and place it in the flotation machine, add 800ml of water and stir it evenly to obtain a pulp; add 8.5kg / t of sulfuric acid, 4kg / t of phosphoric acid, and 1.5kg to the pulp in the flotation machine in sequence / t Sulfofatty acid collector, after adding, stir for 8 minutes, then, ventilate and scrape bubbles for 8 minutes, carry out reverse flotation, and then drain the concentrate product and tailing product to obtain phosphorous concentrate and calcium-magnesium-rich ore , Phosphate concentrate can be used to produce phosphoric acid;

[0036] 2) Put the calcium-magnesium-rich ore obtained in step 1) into a 1000ml three-necked flask, add 180ml of hydrochloric acid with a mass fract...

Embodiment 2

[0042] combine figure 1 As shown, the method for producing phosphate concentrate and byproduct α-hemihydrate gypsum and magnesium carbonate from the calcareous collophosphine of the present embodiment specifically includes the following steps:

[0043] 1) Take 500g of calcareous colloidal phosphate and place it in the flotation machine, add 910ml of water and stir it evenly to obtain a pulp; add 15kg / t of sulfuric acid, 6.5kg / t of phosphoric acid, and 3.0kg of the pulp in the flotation machine in sequence / t sulfo fatty acid collector, after the addition is complete, stir for 6 minutes, then ventilate and scrape bubbles for 15 minutes, carry out reverse flotation, and then drain the concentrate product and tailing product to obtain phosphorous concentrate and calcium-magnesium-rich ore , Phosphate concentrate is used to produce phosphoric acid;

[0044] 2) Put the calcium-magnesium-rich ore obtained in step 1) into a 1000ml three-necked flask, add 210ml of hydrochloric acid w...

Embodiment 3

[0050] combine figure 1 As shown, the method for producing phosphate concentrate and byproduct α-hemihydrate gypsum and magnesium carbonate from the calcareous collophosphine of the present embodiment specifically includes the following steps:

[0051] 1) Take 500g of calcareous collophosphine and place it in the flotation machine, add 1200ml of water and stir evenly to obtain a pulp; add 15.2kg / t of sulfuric acid, 7.7kg / t of phosphoric acid, and 1.2 kg / t of sulfuric acid to the pulp in the flotation machine kg / t sulfo fatty acid collector, after the addition is complete, stir for 4 minutes, then ventilate and scrape bubbles for 12 minutes, carry out reverse flotation, and then drain the concentrate product and tailings product to obtain phosphorus concentrate and calcium-magnesium-rich ore, phosphate concentrate is used to produce phosphoric acid;

[0052] 2) Put the calcium-magnesium-rich ore obtained in step 1) into a 1000ml three-necked flask, add 190ml of hydrochloric ac...

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Abstract

The invention provides a method for producing phosphate concentrate and by-producing alpha-hemihydrate gypsum and magnesium carbonate from calcareous collophanite. According to the method, phosphate concentrate and calcium-rich and magnesium-rich tailings in the calcareous collophanite are separated out through flotation; then the calcium-rich and magnesium-rich tailings are subjected to acidolysis; and then a calcium precipitation reaction, a phosphorus precipitation reaction, concentration and a magnesium precipitation reaction are conducted in sequence so as to obtain a series of products such as alpha-hemihydrate gypsum and magnesium carbonate. According to the invention, flotation is conducted on the calcareous collophanite at first, and then calcium and magnesium elements in the tailings obtained by flotation are comprehensively utilized, so the phosphorus grade of the collophanite is improved, the collophanite is converted into the phosphate concentrate which is better to utilize, a series of problems caused by the tailings are solved, the added value of the collophanite is increased, negative influence on the environment is reduced, and a good guiding effect is provided fordevelopment and utilization of the collophanite.

Description

technical field [0001] The invention relates to the technical field of resource utilization of waste, in particular to a method for producing phosphate concentrate from calcareous collophosite and by-producting α-hemihydrate gypsum and magnesium carbonate. 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 processing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/08C01F5/24C01F11/46
CPCB03D1/08C01F5/24C01F11/46
Inventor 张华丽潘益潘志权
Owner WUHAN INSTITUTE OF TECHNOLOGY
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