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Recycling treatment method of high-magnesium phosphate tailings

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

Active Publication Date: 2019-11-22
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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  • Recycling treatment method of high-magnesium phosphate tailings

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Embodiment 1

[0030] Combine figure 1 As shown, the resource treatment method of high-magnesium phosphate tailings of this 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 phosphate tailings powder, and gradually add the high-magnesium phosphate tailings to the three-necked flask In the flask, when the high-magnesium phosphate tailings are added, turn on the condensed water, start stirring, reflux for 30 minutes at 60°C, and carry out the acidolysis reaction. After the acidolysis reaction is over, heat and filter at 60°C to obtain acidolysis solution A and Silicon slag, where the silicon slag is washed three times with 100 mL of distilled water, and the first water washing liquid is mixed with acid hydrolysis liquid A;

[0032] 2) Pour the acid hydrolysis solution A into a dry beaker, place it in an ice bath at -2°C, and let it sta...

Embodiment 2

[0038] Combine figure 1 As shown, the resource treatment method of high-magnesium phosphate tailings of this 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 phosphate tailings powder, and gradually add the high-magnesium phosphate tailings to the three-necked flask In the flask, when the high-magnesium phosphate tailings are added, turn on the condensed water, start stirring, reflux for 30 minutes at 60°C, and carry out the acidolysis reaction. After the acidolysis reaction is over, heat and filter at 60°C to obtain acidolysis solution A and Silicon slag, where the silicon slag is washed three times with 100 mL of distilled water, and the first water washing liquid is mixed with acid hydrolysis liquid A;

[0040] 2) Pour the acid hydrolysis solution A into a dry beaker, place it in an ice bath at -2°C, and let it sta...

Embodiment 3

[0046] Combine figure 1 As shown, the resource treatment method of high-magnesium phosphate tailings of this 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 phosphate tailings powder, and gradually add the high-magnesium phosphate tailings to the three-necked flask In the flask, when the high-magnesium phosphorus tailings are added, turn on the condensed water, start stirring, reflux at 35°C for 35 minutes, and carry out the acidolysis reaction. After the acidolysis reaction is completed, keep the temperature and suction at 60°C to obtain acidolysis solution A and silicon. The slag, in which, the silicon slag is washed three times with 100 mL of distilled water, and the first water washing liquid is mixed with the acid hydrolysis liquid A;

[0048] 2) Pour the acid hydrolysis solution A into a dry beaker, place it in...

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Abstract

The invention provides a recycling treatment method of high-magnesium phosphate tailings. The recycling treatment method comprises the following steps: performing acidolysis by hydrochloric acid for separating out silicon slag in the high-magnesium phosphate tailings; carrying out low-temperature standing treatment, so that phosphorus in the high-magnesium phosphate tailings is separated out in the form of calcium chlorophosphate; then, performing sulfuric acid acidification to separate out the calcium and magnesium in the high-magnesium phosphate tailings; and finally, carrying out step-by-step concentration treatment to obtain calcium sulfate whiskers and magnesium chloride whiskers. The product is high in additional value, the whole resource utilization process of the high-magnesium phosphate tailings is simple, the resource utilization rate of the high-magnesium phosphate tailings is greatly increased, the problem of accumulation of the phosphate tailings is solved, environmental pollution caused by the phosphate tailings is solved, the ecological environment is improved, and huge economic, social and environmental benefits are achieved.

Description

Technical field [0001] The invention relates to the technical field of waste resource utilization, in particular to a resource treatment method of high-magnesium phosphate tailings. Background technique [0002] Phosphate tailings mainly come from the tailings left after the concentrate is extracted from the beneficiation, which belongs to the mining solid waste in the industrial solid waste. Its minerals mainly include dolomite, fluoroapatite and quartz, and its CaO content is about 30.0-34.0%, P 2 O 5 The content is about 4-8.5%, and the MgO content is about 12-18%. [0003] With the increase in phosphate mining, the number of phosphate tailings is also rising rapidly. Every 1 million tons of phosphate rock will produce 300,000 to 400,000 tons of phosphate tailings. At present, the comprehensive utilization rate of phosphorus tailings is only 18%, and most of them are discharged to tailings ponds or stored in tailings yard after dehydration. Its comprehensive utilization metho...

Claims

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Application Information

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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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