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Harm reduction processing method for phosphogypsum and red mud

A treatment method, phosphogypsum technology, applied in the field of phosphorus chemical industry, environmental protection and industrial waste slag reduction, aluminum chemical industry, can solve environmental pollution and other problems, achieve the effect of difficult construction, high requirements, and saving investment in yard anti-seepage

Inactive Publication Date: 2008-09-17
贵州平坝宏大铝化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is achieved by using the industrial waste residue in the phosphate fertilizer industry--phosphogypsum and the industrial waste residue in the aluminum industry--red mud to mix, stir evenly and then stack them to reduce and reduce the amount of waste in phosphogypsum and red mud waste. The amount and concentration of harmful substances can be reduced, so as to completely solve the environmental pollution problems caused by phosphogypsum and red mud, and further serve as artificial soil base materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The red mud used in the implementation is the fresh red mud under the plate and frame filter press of Guizhou Pingba Hongda Aluminum Chemical Co., Ltd. The chemical composition of the red mud is: Al 2 o 3 : 23.84%, SiO 2 : 13.60%, Fe 2 o 3 : 7.4%; CaO: 22.5%, TiO 2 : 7.5%, Na 2 O: 5.4%.

[0031]The alkalinity of red mud is determined according to the national standard of the People's Republic of China: Solid Waste Corrosion Measurement GB / T15555.12-1995, the pH value is 11.3,

[0032] The phosphogypsum used in the implementation is fresh phosphogypsum under the transition machine of Chitianhua Group Guizhou Tianfeng Chemical Co., Ltd., and the chemical composition of phosphogypsum: SiO 2 : 4.08%, Fe 2 o 3 : 0.4%; CaO: 33.6%, SO 3 : 44.33%, P 2 o 5 : 2.52%, water-soluble phosphorus 1.36%.

[0033] The acidity of phosphogypsum is determined according to the national standard of the People's Republic of China: Determination of Corrosivity of Solid Waste GB / T1...

Embodiment 2

[0040] The red mud used in the implementation is the fresh red mud under the plate and frame filter press of Guizhou Pingba Hongda Aluminum Chemical Co., Ltd. The chemical composition of the red mud is: Al 2 o 3 : 24.05%, SiO 2 : 13.87%, Fe 2 o 3 : 7.1%; CaO: 23.6%, TiO 2 : 7.35%, Na 2 O: 6.0%.

[0041] The alkalinity of red mud is determined according to the national standard of the People's Republic of China: Solid Waste Corrosion Measurement GB / T15555.12-1995, and the pH value is 11.5.

[0042] The chemical composition and water-soluble fluoride of the phosphogypsum used in the implementation are the same as in Example 1.

[0043] Ingredients: Take 100 kg of phosphogypsum, mix it with a mixer and store it according to the weight ratio of phosphogypsum to red mud of 1.0:1.0.

[0044] Implementation results:

[0045] After 2 days, a sample was taken for detection (the detection method was the same as before), and the pH value of the mixture was 7.7, and the water-sol...

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PUM

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Abstract

The invention discloses a harm reducing processing method for phosphogypsum and red mud, comprising the following steps: processing acidity-alkalinity analysis to the phosphogypsum and red mud at first, then mixing the phosphogypsum and red mud to 1.0 to 1.0 according to the molar ratio of H<+> and OH<-> based on the alkali content of the phosphogypsum and red mud, and then stacking the mixture of phosphogypsum and red mud after being stirred uniformly. By resolving the long-period unresolved major problem for enterprises, the harm reducing processing method for phosphogypsum and red mud has the advantages of less investment, quick returns and important contribution to the environmental protection.

Description

Technical field: [0001] The invention relates to a harm reduction treatment method for phosphogypsum and red mud, and belongs to the technical category of phosphorus chemical industry, aluminum chemical industry, environmental protection and industrial waste residue reduction. Background technique: [0002] The comprehensive utilization of phosphogypsum and red mud is not only a difficult problem for enterprises, but also a difficult problem for the whole country and even the world. [0003] (1) Phosphogypsum [0004] Phosphogypsum is the solid waste discharged during the production of phosphate fertilizer and phosphoric acid. For every ton of phosphoric acid produced (in P 2 o 5 Total) about 4.5-5 tons of phosphogypsum will be produced. Phosphogypsum dihydrate gypsum (CaSO 4 2H 2 O) and hemihydrate gypsum (CaSO 4 1 / 2H 2 O), mostly dihydrate gypsum. In addition to calcium sulfate as the main component, phosphogypsum also contains a small amount of phosphoric acid, si...

Claims

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Application Information

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IPC IPC(8): B09B3/00
Inventor 胡兆平姚华龙
Owner 贵州平坝宏大铝化工有限公司
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