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Method for preparing geopolymer adsorption material by using Bayer process red mud

A technology of Bayer red mud and adsorption materials, which is applied in the field of inorganic non-metallic material preparation, can solve the problem of no substantial progress in the comprehensive utilization of Bayer red mud, and achieve the effects of strong scalability, uniform pores, and high strength

Active Publication Date: 2016-03-02
徐州星皓乐器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the treatment of red mud is mainly used for building materials and extracting useful substances from it. After a lot of experimental research, the application of sintered red mud in building materials has entered the stage of large-scale production, and has accumulated decades of production experience , and there is no substantial progress in the comprehensive utilization of Bayer process red mud

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) First, kaolin and Bayer process red mud were dried to a moisture content of 0.8%, and then the kaolin was calcined at 800°C for 6 hours and then ball-milled to a specific surface area of ​​800m 2 / Kg, the Bayer red mud is ball milled to a specific surface area of ​​400m 2 / Kg.

[0018] (2) Mix the Bayer process red mud treated in step (1) with the calcined kaolin treated in step (1) at a mass ratio of 3:7.

[0019] (3) Utilize chemically pure NaOH to transfer high-modulus industrial water glass to a water glass solution with a modulus of 1.5.

[0020] (4) the mixture that step (2) is made is placed in stirring pot, then add the water glass solution that the modulus that a certain amount of step (3) makes is 1.5, make the sodium oxide quality in the water glass solution be step ( 2) 8% of the total mass of the prepared mixture, the water-cement ratio of the slurry is 0.36, and the mixture is evenly stirred.

[0021] (5) get the aluminum powder that accounts for th...

Embodiment 2

[0023] (1) First, kaolin and Bayer process red mud were dried to a moisture content of 0.5%, and then the kaolin was calcined at 800°C for 6 hours and then ball-milled to a specific surface area of ​​800m 2 / Kg, the Bayer red mud is ball milled to a specific surface area of ​​400m 2 / Kg.

[0024] (2) Mix the Bayer process red mud treated in step (1) with the calcined kaolin treated in step (1) at a mass ratio of 1:1.

[0025] (3) Utilize chemically pure NaOH to transfer high-modulus industrial water glass to a water glass solution with a modulus of 1.5.

[0026] (4) the mixture that step (2) is made is placed in stirring pot, then add the water glass solution that the modulus that a certain amount of step (3) makes is 1.5, make the sodium oxide quality in the water glass solution be step ( 2) 8% of the total mass of the prepared mixture, the water-cement ratio of the slurry is 0.36, and the mixture is evenly stirred.

[0027] (5) get the aluminum powder that accounts for th...

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Abstract

The invention discloses a method for preparing geopolymer adsorption material by using Bayer process red mud. According to the invention, kaolin and red mud are respectively dried, kaolin is calcined after ball milling, then red mud and calcined kaolin are mixed according to mass ratio of 3: 7-6: 4, placed in a stirring pan, a soluble glass solution with 1.5 of modulus is added for uniformly stirring until the sodium oxide mass in the soluble glass solution accounts for 8% of total mass of a mixture of the calcined kaolin and red mud, the water cement ratio of the slurry is 0.35-0.38; a proper amount of aluminum powder and powdered soap are placed in a few water, and uniformly dispersed and then added in the obtained slurry, uniformly stirred; after waiting for 3-5 minutes, the expanded slurry is filled in a die, and the expanded slurry is placed in a baking oven with the die or placed in the baking oven without die for maintenance, so that the geopolymer adsorption material is prepared. The method has the advantages of simple equipment, low cost, easy popularization and little environmental influence, the prepared geopolymer adsorption material has the advantages of uniform pore and high strength, and can be reused after being processed by an acid solution.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic materials, and in particular relates to a method for preparing geopolymer adsorption materials by using Bayer process red mud. Background technique [0002] Geopolymer materials are completely different from Portland cement in terms of mineral composition. It is composed of amorphous minerals, and its main raw material is highly active metakaolin; alkaline activators (caustic potash, caustic soda, water glass, potassium silicate etc.); hardening accelerator (calcium silicate and silica fume with low calcium-silicon ratio, all of which are amorphous); admixture (mainly retarder). After entering the 1990s, the selection range of raw materials and activators has been greatly expanded, and the sources of silicon-alumina raw materials have been expanded to four categories: volcanic zeolite, fly ash, mineral waste residue, and burnt clay; activators include single alkali me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16B01J20/30C02F1/28
Inventor 朱文凤彭鹏王林江王斌王珏
Owner 徐州星皓乐器有限公司