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A kind of resource processing method of high magnesium phosphorus tailings

A technology of high-magnesium phosphorus tailings and treatment methods, applied in chemical instruments and methods, single crystal growth, single crystal growth, etc., can solve the problems of low resource utilization rate of phosphorus tailings and low added value of products, and achieve high The resource utilization process of magnesium phosphorus tailings is simple, the effect of reducing the cost of resource utilization and improving the utilization rate of resource

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 treatment 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 kind of resource processing method of high magnesium phosphorus tailings

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Embodiment 1

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

[0031] 1) Measure 520mL of industrial hydrochloric acid with a mass fraction of 32% (10.34mol / 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 -2°C, and let it stand for 11 hours to completely precipitate the white calcium chloride phosphate, then filter it at -2...

Embodiment 2

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

[0039] 1) Measure 520mL of industrial hydrochloric acid with a mass fraction of 32% (10.34mol / 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;

[0040] 2) Pour the acid solution A into a dry beaker, place it in an ice bath at -2°C, and let it stand for 11 hours to completely precipitate the white calcium chlorphosphate, then filter it at -2°C t...

Embodiment 3

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

[0047]1) Measure 493mL of industrial hydrochloric acid with a mass fraction of 34% (10.76mol / 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, open the condensed water, start stirring, reflux at 35°C for 35 minutes, and carry out the acidolysis reaction. 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 -11°C, and let it stand for 5.5 hours to completely precipitate the white calcium chlorphosphate, then filter it at -11°C to separate ...

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Abstract

The invention provides a method for resourceful treatment of high-magnesium phosphorus tailings. The resourceful treatment method first uses hydrochloric acid acid hydrolysis to separate the silicon slag in the high-magnesium phosphorus tailings, and then leaves the high-magnesium phosphorus tailings by standing at low temperature. 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, and finally, calcium sulfate whiskers and magnesium chloride whiskers are obtained through step-by-step concentration treatment, and the obtained products are added The 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 problems caused by phosphorus tailings. Environmental pollution and improvement of ecological environment have huge economic, social and environmental benefits.

Description

technical field [0001] The invention relates to the technical field of resource utilization of waste, in particular to a method for resource recovery 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): C30B29/62C30B29/46C30B29/12C30B7/14
CPCC30B7/14C30B29/12C30B29/46C30B29/62
Inventor 张华丽潘益吴汉军潘志权
Owner WUHAN INSTITUTE OF TECHNOLOGY
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