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Method for preparing calcium chloride phosphate and magnesium chloride whiskers from high-magnesium phosphate tailings

A technology of high-magnesium phosphorus tailings and calcium chlorophosphate, which is applied in the field of waste resource utilization, can solve the problems of low added value of products and low utilization rate of phosphorus tailings, so as to reduce resource utilization costs and improve resource utilization. High utilization rate and high added value

Inactive Publication Date: 2019-11-12
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 method for preparing calcium chlorophosphate and magnesium chloride whiskers from high-magnesium phosphorus tailings, so as to solve the problems of low resource utilization rate of existing phosphorus tailings and low added value of products

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  • Method for preparing calcium chloride phosphate and magnesium chloride whiskers from high-magnesium phosphate tailings

Examples

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Effect test

Embodiment 1

[0026] combine figure 1 As shown, the method for preparing calcium chlorophosphate and magnesium chloride whiskers by utilizing high-magnesium phosphorus tailings of the present embodiment specifically comprises the following steps:

[0027] 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;

[0028] 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 ...

Embodiment 2

[0032] combine figure 1 As shown, the method for preparing calcium chlorophosphate and magnesium chloride whiskers by utilizing high-magnesium phosphorus tailings of the present embodiment specifically comprises the following steps:

[0033] 1) Measure 513mL of industrial hydrochloric acid with a mass fraction of 33% (10.41mol / 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 45°C for 20 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;

[0034] 2) Pour the acid solution A into a dry beaker, place it in an ice bath at -8°C, and let it stand for 8 hours to completely precip...

Embodiment 3

[0038] combine figure 1 As shown, the method for preparing calcium chlorophosphate and magnesium chloride whiskers by utilizing high-magnesium phosphorus tailings of the present embodiment specifically comprises the following steps:

[0039] 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, turn on the condensed water, start stirring, and reflux at 35°C for 35 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 -11°C, and let it stand for 5.5 hours to completely precipitate th...

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Abstract

The invention provides a method for preparing calcium chloride phosphate and magnesium chloride whiskers from high-magnesium phosphate tailings. The method comprises the following steps: performing acidolysis by using hydrochloric acid, separating out silicon slag in high-magnesium phosphate tailings, performing low-temperature standing to make phosphorus in the high-magnesium phosphate tailings precipitate in the form of calcium chloride phosphate, performing acidification by using sulfuric acid, separating out calcium and magnesium in the high-magnesium phosphate tailings, and performing concentrating treatment to obtain the magnesium chloride whiskers. The method makes the whole recycling process of the high-magnesium phosphate tailings simple, and facilitates the great improvement of the recycling rate of the high-magnesium phosphate tailings, so the accumulation problem of the phosphate tailings accumulation can be easily solved, thereby the method easily solves the environmentalpollution caused by the phosphate tailings, improves the ecological environment, and has great 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 preparing calcium chlorophosphate and magnesium chloride whiskers from 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B25/455C30B29/12C30B29/62B09B3/00
CPCC01B25/455C30B29/12C30B29/62B09B3/40
Inventor 张华丽潘益潘志权吴汉军
Owner WUHAN INSTITUTE OF TECHNOLOGY
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