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Method for increasing utilization rate of carbon resources in phosphate tailings

A technology of high magnesium and phosphorus tailings and utilization rate, 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 resources, so as to increase added value, reduce treatment costs, reduce The effect of pollution

Pending Publication Date: 2020-07-14
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of this, the present invention aims to propose a method for improving the utilization rate of carbon resources in phosphorus tailings, so as 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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  • Method for increasing utilization rate of carbon resources in phosphate tailings
  • Method for increasing utilization rate of carbon resources in phosphate tailings

Examples

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Embodiment 1

[0032] combine figure 1 As shown, the method for improving the utilization rate of carbon resources in phosphorus tailings of the present embodiment specifically includes the following steps:

[0033] 1) Take 120g of phosphogypsum and place it in a 500ml three-necked flask, slowly add 100g of ammonia water with a mass fraction of 25%, stir and mix thoroughly to obtain a phosphogypsum-ammonia water mixed suspension, and mix the phosphogypsum-ammonia water mixed suspension Divide into two parts, place them in 250ml flasks respectively, and connect them with rubber tubes in the middle;

[0034] 2) Weigh 100g of high-magnesium phosphorus tailings and mix it with 200ml of water, place it in a 3000ml three-necked flask, start stirring, and connect the three-necked flask to one end of the airway, and the other end of the airway is connected to a portion of phosphogypsum- Add 220ml of industrial hydrochloric acid with a mass fraction of 31% (10.35mol / L) slowly to the flask containing...

Embodiment 2

[0037] combine figure 1 As shown, the method for improving the utilization rate of carbon resources in phosphorus tailings of the present embodiment specifically includes the following steps:

[0038] 11) Take 125g of phosphogypsum and place it in a 500ml three-necked flask, slowly add 90g of ammonia water with a mass fraction of 25%, stir and mix thoroughly to obtain a phosphogypsum-ammonia water mixed suspension, and mix the phosphogypsum-ammonia water mixed suspension Divide into two parts, place them in 250ml flasks respectively, and connect them with rubber tubes in the middle;

[0039] 2) Weigh 100g of high-magnesium phosphorus tailings and mix it with 200ml of water, place it in a 3000ml three-necked flask, start stirring, and connect the three-necked flask to one end of the airway, and the other end of the airway is connected to a portion of phosphogypsum- Add 223ml of industrial hydrochloric acid with a mass fraction of 30.8% (10.32mol / L) slowly to the flask containi...

Embodiment 3

[0042] combine figure 1 As shown, the method for improving the utilization rate of carbon resources in phosphorus tailings of the present embodiment specifically includes the following steps:

[0043] 1) Take 120g of phosphogypsum and place it in a 500ml three-necked flask, slowly add 80g of ammonia water with a mass fraction of 25%, fully stir and mix to obtain a phosphogypsum-ammonia water mixed suspension, and mix the phosphogypsum-ammonia water mixed suspension Divide into two parts, place them in 250ml flasks respectively, and connect them with rubber tubes in the middle;

[0044] 2) Weigh 100g of high-magnesium phosphorus tailings and mix it with 200ml of water, place it in a 3000ml three-necked flask, start stirring, and connect the three-necked flask to one end of the airway, and the other end of the airway is connected to a portion of phosphogypsum- Add 240ml of industrial hydrochloric acid with a mass fraction of 30.0% (10.19mol / L) slowly to the flask containing the...

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Abstract

The invention provides a method for increasing the utilization rate of carbon resources in phosphate tailings. The method comprises the following steps: performing acidolysis on the phosphate tailings, and sequentially introducing CO2 generated in the acidolysis process into two parts of ammonia water-phosphogypsum turbid liquid to obtain a CaCO3 solid and an ammonium sulfate solution, or sequentially introducing CO2 into the ammonia water-phosphogypsum turbid liquid and an ammonia water solution to obtain the CaCO3 solid, the ammonium sulfate solution and an ammonium carbonate solution. A two-stage reaction method is adopted to improve the conversion rate of the reaction of carbon dioxide and ardealite-ammonia water mixed turbid liquid in tailing acidolysis; or unreacted carbon dioxide isabsorbed and stored by adopting a pre-reaction method, therefore, carbon resources in the tailings are effectively recycled; the tailings and the phosphogypsum are combined for treatment, carbon resources in the tailings are finally converted into calcium carbonate products, resource waste is reduced, pollution to the environment is reduced, the additional value of the tailings is increased, a new direction is provided for utilization of the tailings, and a certain economic value is achieved.

Description

technical field [0001] The invention relates to the technical field of waste resource utilization, in particular to a method for improving the utilization rate of carbon resources in phosphorus tailings. Background technique [0002] Phosphorus tailings are essentially a kind of industrial waste, which mainly comes from the tailings slag left after ore dressing and extraction of concentrate, and are subdivided into mining solid waste in industrial solid waste. At present, the treatment and utilization status of high-magnesium phosphorus tailings is severe. Phosphorus tailings that have not been effectively treated for a long time have piled up like mountains, causing serious pollution to the environment and a waste of resources. Therefore, the treatment of phosphorus tailings is currently the Phosphorus chemical research is facing an important topic. [0003] With the rapid development of my country's chemical industry, while the production efficiency is improving, the tota...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18B09B3/00
CPCC01F11/182B09B3/80Y02W30/20
Inventor 张华丽潘益吴汉军张家鑫潘志权
Owner WUHAN INSTITUTE OF TECHNOLOGY
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