Method for treating high-magnesium phosphate tailings by utilizing diethylenetriamine pentamethylene phosphonic acid

A technology of diethylenetriaminepentamethylenephosphonic acid and high-magnesium phosphorus tailings, which is applied in the field of waste resource utilization, can solve the problems of poor decomposition effect and low comprehensive utilization rate of high-magnesium phosphorus tailings, and improve the comprehensive utilization rate. Improvement of utilization rate, phosphorus grade and cost reduction

Inactive Publication Date: 2019-12-20
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] In view of this, the present invention aims to propose a method for treating high-magnesium phosphorus tailings with diethylenetriaminepentamethylenephosphonic acid, so as to solve the problem of poor decomposition effect of existing high-magnesium phosphorus tailings, resulting in low comprehensive utilization rate The problem

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  • Method for treating high-magnesium phosphate tailings by utilizing diethylenetriamine pentamethylene phosphonic acid

Examples

Experimental program
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Effect test

Embodiment 1

[0021] combine figure 1 As shown, the method of utilizing diethylenetriaminepentamethylenephosphonic acid in this embodiment to treat high-magnesium phosphorus tailings specifically includes the following steps:

[0022] After the pH value of 200g diethylenetriaminepentamethylenephosphonic acid (DTPMP) is adjusted to 1 with ammonia water, the oil bath is heated to 70°C, and then, according to the amount of the total substance of calcium and magnesium in the high-magnesium phosphorus tailings and diethylene triethylene The ratio of the substance amount of amine pentamethylene phosphonic acid is 1.56, adding high-magnesium phosphorus tailings, and stirring and reacting for 90min at a mechanical stirring speed of 100r / min, then filtering while hot, washing with water for 3 times and filtering to obtain The acid hydrolysis slag (silicon slag) is dried to obtain high phosphorus grade tailings.

[0023] For MgO, CaO, P of high magnesium phosphorus tailings in the present embodiment...

Embodiment 2

[0026] combine figure 1 As shown, the method of utilizing diethylenetriaminepentamethylenephosphonic acid in this embodiment to treat high-magnesium phosphorus tailings specifically includes the following steps:

[0027] After the pH value of 200g diethylenetriaminepentamethylenephosphonic acid (DTPMP) is adjusted to 3 with ammonia water, the oil bath is heated to 70°C, and then, according to the amount of the total substance of calcium and magnesium in the high-magnesium phosphorus tailings and diethylene triethylene The ratio of the substance amount of amine pentamethylene phosphonic acid is 1.56, adding high-magnesium phosphorus tailings, and stirring and reacting for 90min at a mechanical stirring speed of 100r / min, then filtering while hot, washing with water for 4 times and filtering to obtain The acid hydrolysis slag (silicon slag) is dried to obtain high phosphorus grade tailings.

[0028] For MgO, CaO, P of high magnesium phosphorus tailings in the present embodiment...

Embodiment 3

[0031] combine figure 1 As shown, the method of utilizing diethylenetriaminepentamethylenephosphonic acid in this embodiment to treat high-magnesium phosphorus tailings specifically includes the following steps:

[0032] After the pH value of 200g diethylenetriaminepentamethylenephosphonic acid (DTPMP) is adjusted to 2.5 with ammonia water, the oil bath is heated to 90 ℃, then, according to the amount of the total substance of calcium and magnesium in the high-magnesium phosphorus tailings and diethylene triethylene The ratio of the substance amount of amine pentamethylene phosphonic acid is 1.56, adding high-magnesium phosphorus tailings, and stirring and reacting for 90 minutes at a mechanical stirring speed of 120r / min, then filtering while hot, washing with water for 5 times and filtering to obtain The acid hydrolysis slag (silicon slag) is dried to obtain high phosphorus grade tailings.

[0033] For MgO, CaO, P of high magnesium phosphorus tailings in the present embodim...

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Abstract

The invention provides a method for treating high-magnesium phosphate tailings by utilizing diethylenetriamine pentamethylene phosphonic acid. The method comprises the following steps that a pH valueof diethylenetriamine pentamethylene phosphonic acid is adjusted with ammonia water to heating to a certain temperature, high-magnesium phosphorus tailings are added, and stirring, filtering, washingand drying are performed to obtain the high-phosphorus grade tailings. According to the method, diethylenetriamine pentamethylene phosphonic acid is adopted to acidify the high-magnesium phosphate tailings, calcium, magnesium and phosphorus can be selectively leached in the process of decomposing the high-magnesium phosphate tailings, the effect of graded decomposition of magnesium reduction and phosphorus enrichment is achieved, the phosphorus grade of the high-magnesium phosphate tailings is improved, a new way is opened for comprehensive utilization of the phosphate tailings, accordingly, the comprehensive utilization rate of the high-magnesium phosphate tailings can be greatly improved, the decomposition rate of MgO is 50-85%, the decomposition rate of CaO is 20-39%. and the decomposition rate of P2O5 is 5-16%.

Description

technical field [0001] The invention relates to the technical field of waste resource utilization, in particular to a method for treating high-magnesium phosphorus tailings with diethylenetriaminepentamethylenephosphonic acid. 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] Phosphate rock resources are very rich in our country, but as a non-renewable resource, 80% of the phosphorite rock is low-grade collophosite that is difficult to select, and contains a large amount of impurities. As the grade of selected phosphate rock decreases, more and more phosphate tailings will be produced. The stacking of tailings will not only occupy a large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B26/20C22B26/22C01B25/01
CPCC01B25/01C22B7/006C22B26/20C22B26/22Y02P10/20
Inventor 张华丽夏琰潘志权吴汉军潘益张家鑫
Owner WUHAN INSTITUTE OF TECHNOLOGY
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