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Preparation method of polysilicon aluminum ferric sulfate flocculant based on red mud

A technology of polymerizing aluminum silicosulfate and flocculant, which is applied in chemical instruments and methods, flocculation/sedimentation water/sewage treatment, water/sludge/sewage treatment, etc. , occupation of land and other issues, to achieve the effects of excellent stability and water purification effect, uniform distribution of silicon, aluminum and iron, and low cost of use

Inactive Publication Date: 2019-07-23
滨州大宗固废资源循环利用研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Red mud, fly ash and other industrial wastes are rich in aluminum, silicon, ferrosilicon, and most of them are industrial wastes. The world produces over 100 million tons of red mud every year, and my country alone discharges about 2 million tons of red mud every year. Such a large amount of red mud is huge Some of them are piled up in the waste dump, occupying a large amount of land, causing alkalization of the land, polluting the groundwater, and endangering people's health
A large amount of metal resources such as alumina and iron oxide in red mud have not been fully and effectively utilized, resulting in a huge waste of resources

Method used

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preparation example Construction

[0023] The present invention provides a technical solution: a method for preparing a red mud-based polysilicate aluminum ferric sulfate flocculant, the method comprising the following steps:

[0024] S1. Mix 1 part of red mud, 0.6-1.3 parts of ferrous sulfate, and 0.4-0.9 parts of alkali in a weight ratio, and calcinate the mixture;

[0025] S2, the mixture is cooled after the calcination is completed, and then the cooled mixture is ground to obtain activated red mud powder, which is ground to a particle size of 100-300 mesh;

[0026] S3. Prepare hydrochloric acid with a volume ratio of 1:1, place the hydrochloric acid in a container of an appropriate size, and then add the activated red mud powder obtained from S2;

[0027] S4, pickling 1 part of activated red mud powder and 10 parts of hydrochloric acid by weight, the pickling time is 3 hours, and the environmental temperature of the pickling process is 50-80°C;

[0028] S5. Add a stabilizer to the acid leaching product solution obtai...

Embodiment 1

[0033] First, weigh 1Kg of red mud, 1Kg of ferrous sulfate and 0.5Kg of soda ash and mix thoroughly, calcinate the above mixture for 1 hour, then cool it to room temperature, then grind the cooled mixture to a particle size of 200 mesh, and then reduce the volume Activated red mud powder with a ratio of 1:1 and 25 kg of industrial hydrochloric acid were stirred for acid leaching at 70°C for 3 hours. Finally, a stabilizer was added to the acid leaching product solution for reaction. The stabilizer was disodium hydrogen phosphate, stabilizer The dosage is 0.4% of the mass of the solution, and the polysilicate aluminum ferric sulfate composite flocculant is obtained by filtration. The product does not appear gel after 60 days of storage.

Embodiment 2

[0035] First, weigh 1.5Kg of red mud, 1.95Kg of ferrous sulfate and 1.3Kg of soda ash and mix thoroughly, calcinate the above mixture for 1.5 hours, then cool it to room temperature, and then grind the cooled mixture to a particle size of 100 mesh, then The activated red mud powder with a volume ratio of 1:1 and 50 kg of industrial hydrochloric acid were stirred for acid leaching at 80°C for 3 hours. Finally, a stabilizer was added to the acid leaching product solution for reaction. The stabilizer was superphosphate, which stabilized The dosage of the agent is 0.4% of the mass of the solution, and the polysilicate aluminum ferric sulfate composite flocculant is obtained by filtration, and no gel appears after the product is stored for 60 days.

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Abstract

The invention discloses a preparation method of a polysilicon aluminum ferric sulfate flocculant based on red mud, and relates to the technical field of composite flocculants. The invention disclosesa preparation method of the polysilicon aluminum ferric sulfate flocculant based on red mud. The prepared polysilicon aluminum ferric composite flocculant is a macromolecular flocculant for water treatment and is prepared by taking red mud waste as a main raw material, so that iron oxide, aluminum oxide and silicon oxide in the red mud waste are effectively utilized for preparing the flocculant. Alarge amount of red mud waste is used in production, so that serious environment pollution due to the red mud waste is avoided, and the red mud waste can be recycled. The method is low in use cost and high in product additional value, the comprehensive utilization rate of the red mud waste is increased, good social benefits, economic benefits and environmental benefits are achieved, and great convenience is brought to people during production and manufacturing of the flocculating agent.

Description

Technical field [0001] The invention relates to the technical field of composite flocculants, in particular to a method for preparing a red mud-based polysilicate aluminum ferric sulfate flocculant. Background technique [0002] Coagulation is currently one of the most widely used unit technologies in the field of water treatment. Where surface water is used as the source of urban drinking water or industrial water, the treatment of various industrial wastewater and urban sewage, the reinjection of oilfield groundwater and sludge treatment, and the advanced treatment of urban and industrial reuse water often use coagulation As the pre-key unit technology in the water treatment process, that is, as the pre-treatment process for the separation and removal of polluting impurities. However, the coagulation treatment effect not only determines the operation status of the subsequent treatment process to a large extent, but also affects the effluent quality and treatment cost of the en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/52
CPCC02F1/5245
Inventor 张会邢乃军谈中伟刘天宝
Owner 滨州大宗固废资源循环利用研究院有限公司
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