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A resource utilization method of high magnesium phosphorus tailings

A high-magnesium phosphorus tailings and resource utilization technology, applied in the field of waste resource utilization, can solve the problems of low resource utilization rate of phosphorus tailings and low added value of products, and achieve the process of resource utilization of high magnesium phosphorus tailings Simple, reduce the cost of resource utilization, and improve the effect of ecological environment

Active Publication Date: 2021-11-12
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention aims to propose a resource utilization method of high-magnesium phosphorus tailings to solve the problems of low resource utilization rate of existing phosphorus tailings and low added value of products

Method used

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  • A resource utilization method of high magnesium phosphorus tailings

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Embodiment 1

[0030] combine figure 1 As shown, the resource utilization method of the high-magnesium phosphorus tailings of the present embodiment specifically includes the following steps:

[0031] 1) Measure 500mL of industrial hydrochloric acid with a mass fraction of 33% (10.39mol / L) in a clean three-necked flask, weigh 261.8g of high-magnesium phosphorus tailings powder, and gradually add high-magnesium phosphorus tailings to the three-necked flask In the flask, after adding the high-magnesium phosphorus tailings, turn on the condensed water, start stirring, and reflux at 60°C for 30 minutes to carry out the acidolysis reaction. Silicon slag, wherein, the silicon slag is washed three times with 100mL distilled water, and the first washing solution is mixed with the acid solution A;

[0032] 2) Pour the acid solution A into a dry beaker, place it in an ice bath at -5°C, and let it stand for 9 hours to completely precipitate the white calcium chloride phosphate, then filter it at -5°C ...

Embodiment 2

[0038] combine figure 1 As shown, the resource utilization method of the high-magnesium phosphorus tailings of the present embodiment specifically includes the following steps:

[0039] 1) Measure 510mL of industrial hydrochloric acid with a mass fraction of 33% (10.39mol / L) in a clean three-necked flask, weigh 261.8g of high-magnesium phosphorus tailings powder, and gradually add high-magnesium phosphorus tailings to the three-necked flask In the flask, after adding the high-magnesium phosphorus tailings, turn on the condensed water, start stirring, and reflux at 40°C for 20 minutes to carry out the acidolysis reaction. Silicon slag, wherein, the silicon slag is washed three times with 100mL distilled water, and the first washing solution is mixed with the acid solution A;

[0040] 2) Pour the acid solution A into a dry beaker, place it in an ice bath at -8°C, and let it stand for 7 hours to completely precipitate the white calcium chloride phosphate, then filter it at -8°C ...

Embodiment 3

[0046] combine figure 1 As shown, the resource utilization method of the high-magnesium phosphorus tailings of the present embodiment specifically includes the following steps:

[0047]1) Measure 490mL of industrial hydrochloric acid with a mass fraction of 34% (10.81mol / L) in a clean three-necked flask, weigh 261.8g of high-magnesium phosphorus tailings powder, and gradually add high-magnesium phosphorus tailings to the three-necked flask In the flask, after the addition of high-magnesium phosphorus tailings is completed, open the condensed water, start stirring, and reflux at 30°C for 40 minutes to carry out acidolysis reaction. Silicon slag, wherein, the silicon slag is washed three times with 100mL distilled water, and the first washing solution is mixed with the acid solution A;

[0048] 2) Pour the acid solution A into a dry beaker, place it in an ice bath at -10°C, and let it stand for 6 hours to completely precipitate the white calcium chlorphosphate, then filter it a...

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Abstract

The invention provides a resource utilization method of high-magnesium phosphorus tailings. In the resource utilization method, the silicon slag in the high-magnesium phosphorus tailings is separated by acid hydrolysis with hydrochloric acid, and then the high-magnesium phosphorus tailings are made The phosphorus in the ore is precipitated in the form of calcium chlorophosphate, and then the calcium and magnesium in the high-magnesium phosphorus tailings are separated by sulfuric acid acidification. Finally, calcium sulfate whiskers and magnesium sulfate whiskers are obtained through step-by-step concentration treatment. The obtained product The added value is high, and the whole resource utilization process of high-magnesium phosphorus tailings is simple, which is conducive to greatly improving the resource utilization rate of high-magnesium phosphorus tailings, thereby helping to solve the problem of phosphorus tailings accumulation, and further helping to solve the problem caused by phosphorus tailings. Environmental pollution, improve the ecological environment, has huge economic, social and environmental benefits.

Description

technical field [0001] The invention relates to the technical field of waste resource utilization, in particular to a method for resource utilization of high-magnesium phosphorus tailings. Background technique [0002] Phosphorus tailings mainly come from the tailings left after beneficiation and extraction of concentrate, which belongs to mining solid waste in industrial solid waste. Its minerals mainly include dolomite, fluorophosphorite and quartz, and its CaO content is about 30.0-34.0%. 2 o 5 The content is about 4-8.5%, and the MgO content is about 12-18%. [0003] With the increase of phosphate rock mining, the amount of phosphate tailings is also rising rapidly. After every 1 million tons of phosphate rock is selected, 300,000 to 400,000 tons of phosphorus tailings will be produced. At present, the comprehensive utilization rate of phosphorus tailings is only 18%, and most of them are discharged to tailings ponds or dehydrated and stored in tailings yards. Its c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/62C30B29/46C30B7/14C01B25/455
CPCC01B25/455C30B7/14C30B29/46C30B29/62
Inventor 张华丽潘益吴汉军潘志权
Owner WUHAN INSTITUTE OF TECHNOLOGY
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