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Alumina ball with construction waste core aggregate wrapped by activated alumina and preparation method of alumina ball

A technology of activated alumina and construction waste, which is applied in the directions of alkali metal oxides/hydroxides, chemical instruments and methods, physical/chemical process catalysts, etc. question

Pending Publication Date: 2021-06-25
CHINA ARCHITECTURE DESIGN & RES GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Compared with other purification materials, activated alumina has strong adsorption characteristics and is widely used in sewage treatment, but its market price is high. At the same time, the adsorption characteristics of different grades of activated alumina are quite different, and the effects produced are also different.
At present, there is a lack of new sewage purification materials on the market that use the core aggregate of construction waste as the core and wrap high-performance activated alumina. Efficient adsorption of alumina

Method used

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  • Alumina ball with construction waste core aggregate wrapped by activated alumina and preparation method of alumina ball
  • Alumina ball with construction waste core aggregate wrapped by activated alumina and preparation method of alumina ball
  • Alumina ball with construction waste core aggregate wrapped by activated alumina and preparation method of alumina ball

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Use bauxite as raw material to prepare active alumina wrapped construction waste core aggregate to prepare sewage purification materials, ordinary alumina powder made from bauxite ore, and then compress and compound with crushed and screened construction waste core aggregate, The novel composite high-efficiency activated alumina ball formed after activation is characterized in that the steps of the preparation method are as follows:

[0035] (1) The bauxite ore is screened and crushed to form a powder, and the powder is mixed with a high-temperature aluminum hydroxide solution at a temperature of 110-130°C to form a sodium aluminate solution, and the residue is removed by filtration.

[0036] (2) Sodium aluminate is heated and cooled to crystallize and precipitate to form aluminum hydroxide crystals. After precipitation and washing, a sodium hydroxide filter cake is formed. The filter cake is calcined and dried at a temperature of 950-1200°C to form alumina.

[0037] (3...

Embodiment 2

[0045] The general activated alumina powder is used to prepare activated alumina and wrap the core aggregate of construction waste to prepare sewage purification materials. The seed crystals are prepared from pseudo-boehmite, and then hydrated with general activated alumina powder to obtain activated alumina. The alumina powder and the crushed and screened construction waste core aggregate are repeatedly compressed and compounded to form a new type of composite high-efficiency activated alumina ball after activation. It is characterized in that the steps of the preparation method are as follows:

[0046] (1) Grind pseudo-boehmite and put it in a seed crystal preparation tank, add pure water with a water temperature of 45-55°C to make a slurry, add 100g / L of appropriate amount of aluminum nitrate and aluminum hydroxide, and adjust the pH value to 6 ~9, injecting steam for hydration reaction to obtain seed crystals.

[0047] (2) Dry and pulverize industrial-grade aluminum hydrox...

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Abstract

The invention discloses an alumina ball with construction waste core aggregate wrapped by activated alumina and a preparation method of the alumina ball, and belongs to the field of sewage treatment and construction waste recycling. The alumina ball with the construction waste core aggregate wrapped by the activated alumina is integrally of a core-shell spherical structure, construction waste core aggregate particles are wrapped by the activated alumina to form the core-shell structure, the activated alumina (1) serves as a shell, and the construction waste core aggregate particles (2) serve as a core; and the construction waste core aggregate particles are of a one-particle or multi-particle structure in the spherical structure, one particle is of a single-core structure, two particles are of a dual-core structure, and when the number of the particles is larger than or equal to three, the construction waste core aggregate particles are independently dispersed or gathered into a whole. Compared with common activated alumina, the novel composite efficient activated alumina ball has the characteristics of better adsorbability, stronger catalytic performance, large pore volume and large specific surface area. And the alumina ball is a green and economic low-carbon environment-friendly material.

Description

technical field [0001] The invention belongs to the field of sewage treatment and construction waste recycling, and in particular relates to an environment-friendly and resource-recycling activated alumina-wrapped construction waste core aggregate sewage purification material and a preparation method. Background technique [0002] At present, with the continuous acceleration of urbanization, urban sewage, waste water, construction waste and other pollutants continue to increase, causing harm to urban environmental pollution. Urban resources are also constantly shrinking in the process of urbanization, and will become unsustainable in the future. The depletion of resources will even affect the sustainability and development of our children and grandchildren. In this resource-scarce and pollutant-constant society, how to turn waste pollutants into valuable social resources has become a new direction for the development of today's society, and it is a necessary means to promote...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/28B01J20/30B01J27/055B01J35/08B01J35/10C02F1/00C02F1/28
CPCB01J20/08B01J20/28019B01J20/28057B01J20/28073B01J27/055C02F1/281C02F1/00B01J20/28011B01J35/51B01J35/61B01J35/635
Inventor 卢兴超尹文超
Owner CHINA ARCHITECTURE DESIGN & RES GRP CO LTD
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