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Ardealite tailing associated resource recovery process

A resource recovery and phosphogypsum technology, applied in the field of phosphogypsum, can solve the problems of less than 10% comprehensive utilization rate and low utilization rate of phosphogypsum, and achieve good ventilation, energy saving, and increase the number of holes

Inactive Publication Date: 2021-01-05
福泉环保城发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the process of producing wet-process phosphoric acid by the dihydric method, 4-5 tons of phosphogypsum is produced for every ton of phosphoric acid produced. According to statistics, the current annual discharge of phosphogypsum in the world is more than 200 million tons, and the annual discharge of phosphogypsum in China is also Up to more than 20 million tons, while the comprehensive utilization rate is less than 10%
The inventors of the present application have found in long-term research that in the existing research on directly using phosphogypsum as raw material to prepare ceramsite, all phosphogypsum is an additive, that is, phosphogypsum is not used as the main raw material, so that the utilization of phosphogypsum rate is not high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A process for recovering phosphogypsum tailings associated resources, comprising: (1) drying and crushing phosphogypsum to obtain phosphogypsum powder; (2) grinding and mixing the phosphogypsum powder with auxiliary materials, red jade soil, vermiculite and bentonite, Add water and compound microbial bacterial agent, stir and mix evenly, stack and mature at 40°C for 24 hours to obtain granulation raw materials; (3) granulate the granulation raw materials to obtain pellets, and dry the pellets Dry and sinter to obtain phosphogypsum ceramsite.

[0022] Wherein, the auxiliary materials include KCl, CaSiO3 and MgSiO3, in parts by mass: 20 parts of KCl, 30 parts of CaSiO3 and 20 parts of MgSiO3.

[0023] The usage amount of each raw material in the step (2) is, in parts by mass: 100 parts of phosphogypsum powder, 2 parts of auxiliary materials, 20 parts of red jade soil, 10 parts of vermiculite and 30 parts of bentonite.

[0024] The compound microbial bacterial agent inclu...

Embodiment 2

[0029] A process for recovering phosphogypsum tailings associated resources, comprising: (1) drying and crushing phosphogypsum to obtain phosphogypsum powder; (2) grinding and mixing the phosphogypsum powder with auxiliary materials, red jade soil, vermiculite and bentonite, Add water and compound microbial bacterial agent, stir and mix evenly, stack and mature at 50°C for 48 hours to obtain granulation raw materials; (3) granulate the granulation raw materials to obtain pellets, and dry the pellets , sintered to obtain phosphogypsum ceramsite.

[0030] Wherein, the auxiliary materials include KCl, CaSiO3 and MgSiO3, in parts by mass: 50 parts of KCl, 60 parts of CaSiO3 and 40 parts of MgSiO3.

[0031] The amount of each raw material used in step (2) is, in parts by mass: 100 parts of phosphogypsum powder, 6 parts of auxiliary materials, 40 parts of red jade soil, 30 parts of vermiculite and 60 parts of bentonite.

[0032] The compound microbial bacterial agent includes: Baci...

Embodiment 3

[0037] A process for recovering phosphogypsum tailings associated resources, comprising: (1) drying and crushing phosphogypsum to obtain phosphogypsum powder; (2) grinding and mixing the phosphogypsum powder with auxiliary materials, red jade soil, vermiculite and bentonite, Add water and compound microbial bacterial agent, stir and mix evenly, stack and mature at 45°C for 36 hours to obtain granulation raw materials; (3) granulate the granulation raw materials to obtain pellets, and dry the pellets , sintered to obtain phosphogypsum ceramsite.

[0038] Wherein, the auxiliary materials include KCl, CaSiO3 and MgSiO3, in parts by mass: 35 parts of KCl, 45 parts of CaSiO3 and 30 parts of MgSiO3.

[0039] The usage amount of each raw material in the step (2) is, in parts by mass: 100 parts of phosphogypsum powder, 4 parts of auxiliary materials, 30 parts of red jade soil, 20 parts of vermiculite and 40 parts of bentonite.

[0040] The compound microbial bacterial agent includes:...

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Abstract

The invention discloses an ardealite tailing associated resource recovery process which comprises the following steps: (1) drying and crushing ardealite to obtain ardealite powder; (2) grinding and mixing the ardealite powder with auxiliary materials, akadama soil, vermiculite and bentonite, adding water and a composite microbial agent, uniformly stirring and mixing, and stacking and curing for 24-48h at the temperature of 40 to 50 DEG C, so as to obtain a granulation raw material; and (3) granulating a granulation raw material to obtain a granular blank, and drying and sintering the granularblank to obtain the ardealite ceramsite. The ardealite is prepared into the ceramsite, so that recycling of the ardealite is realized, energy is saved, and the problem of environmental pollution of industrial wastes is solved. The composite microbial agent can adjust the pH value of the ceramsite, and can also increase the number of holes in the granulation raw material.

Description

technical field [0001] The invention relates to the field of phosphogypsum, in particular to a process for recovering associated resources of phosphogypsum tailings. Background technique [0002] Ceramsite is ceramic particles, most of which are round or oval spheres in appearance, and a small amount of irregular shaped particles such as imitation gravel. Its surface has a hard shell, which is pottery or glaze, which gives ceramsite high strength. Ceramsite has more pores and sufficient air permeability, and the pores have better adsorption properties, which can absorb more water vapor, making the water retention and moisturizing properties stronger. For this reason, some researchers use ceramsite in soilless cultivation, landscaping and other fields. [0003] Phosphogypsum is a solid waste discharged from the production of phosphate fertilizers and phosphoric acid. The main component of phosphogypsum is calcium sulfate (CaSO 4 2H 2 O), in addition, it also contains a sm...

Claims

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Application Information

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IPC IPC(8): C04B33/132C04B33/13C04B33/32C04B38/02
CPCC04B38/009C04B38/025C04B33/132C04B33/13C04B33/32C04B2235/3201C04B2235/3454C04B2235/3445C04B2235/6562C04B2235/6567Y02P40/60
Inventor 周春松王荔孙坚沈锦君余云丰
Owner 福泉环保城发展有限公司
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