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Braking-free brick mainly prepared from polyaluminum chloride waste residues and red mud and preparation method thereof

A technology of polyaluminum chloride and unburned bricks, which is applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of low cost, achieve low cost, improve compressive strength, and good technical performance Effect

Active Publication Date: 2014-02-05
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a method for producing burn-free bricks with red mud and PAC waste residue as main raw materials and active mineral materials, lime, and gypsum as auxiliary materials. While comprehensively utilizing red mud and PAC waste residue, the The environmental pollution problems caused by the storage and disposal of red mud and PAC waste residue, and the unburned bricks at the production site are of good quality, high strength, good technical performance, and low cost

Method used

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  • Braking-free brick mainly prepared from polyaluminum chloride waste residues and red mud and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]1. Dry red mud and PAC waste residue at 105°C for 3 hours respectively. After natural cooling, crush the dried red mud and pass through a 80-mesh sieve to obtain red mud powder. Grind the dried PAC waste residue and pass through 40 Mesh sieve to get PAC waste residue powder.

[0038] 2. Dry the lime and gypsum respectively at 105°C for 3 hours. After natural cooling, crush the dried lime and gypsum respectively, and pass through a 100-mesh sieve to obtain lime powder and gypsum powder respectively.

[0039] 3. Weigh 25 parts of red mud powder, 45 parts of polyaluminum chloride waste slag powder, 20 parts of fly ash, 6 parts of lime, and 4 parts of gypsum. Stir and mix the above raw materials evenly for initial mixing. The initial mixing time is 3 minutes , and then add 8 parts of water, and then carry out secondary mixing by stirring, and the mixing time of secondary mixing is 5min to obtain a mixture. The added water can be tap water, recovered reclaimed water or conde...

Embodiment 2

[0044] 1. Dry red mud and PAC waste residue at 105°C for 4 hours respectively. After natural cooling, crush the dried red mud and pass through a 80-mesh sieve to obtain red mud powder. Grind the dried PAC waste residue and pass through 40 Mesh sieve to get PAC waste residue powder.

[0045] 2. Dry lime and gypsum respectively at 105°C for 4 hours, and after natural cooling, crush the dried lime and gypsum respectively, and pass through a 100-mesh sieve to obtain lime powder and gypsum powder respectively.

[0046] 3. Weigh 35 parts of red mud powder, 35 parts of polyaluminum chloride waste residue powder, 2 parts of cement, 18 parts of fly ash, 5 parts of lime, and 5 parts of gypsum. Stir the above raw materials evenly for initial mixing. The time is 4 minutes, then 10 parts of water are added, and then the secondary mixing is carried out by stirring, and the mixing time of the secondary mixing is 4 minutes to obtain a mixture. The added water can be tap water, recovered recl...

Embodiment 3

[0051] 1. Dry red mud and PAC waste residue at 105°C for 3 hours respectively. After natural cooling, crush the dried red mud and pass through a 80-mesh sieve to obtain red mud powder. Grind the dried PAC waste residue and pass through 40 Mesh sieve to get PAC waste residue powder.

[0052] 2. Dry the lime and gypsum respectively at 105°C for 3 hours. After natural cooling, crush the dried lime and gypsum respectively, and pass through a 100-mesh sieve to obtain lime powder and gypsum powder respectively.

[0053] 3. Weigh 35 parts of red mud powder, 35 parts of polyaluminum chloride waste residue powder, 5 parts of cement, 15 parts of fly ash, 4 parts of lime, and 6 parts of gypsum. Stir the above raw materials evenly for initial mixing. The time is 5 minutes, then 12 parts of water are added, and the second mixing is carried out by stirring, and the mixing time of the second mixing is 5 minutes to obtain a mixture. The added water can be tap water, recovered reclaimed water...

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Abstract

The invention relates to a braking-free brick mainly prepared from polyaluminum chloride waste residues and red mud and a preparation method thereof. Raw materials for preparing the braking-free brick comprise the red mud, the polyaluminum chloride waste residues, an active mineral material, lime and gypsum. The preparation method comprises the following steps: uniformly mixing the raw materials in proportion, adding 8-12 parts of water, stirring, mixing, carrying out compression molding, sprinkling water and curing. The preparation method has the advantages that the red mud and the PAC (polyaluminum chloride) waste residue are used as the main raw materials, pulverized fuel ash, cement, the lime and the gypsum are added, so that the using amount of an excitant is reduced, the strength of the brick is improved, the usability of the braking-free brick can be improved, meanwhile the national standard requirements are completely satisfied, a gel material does not need to be added in a production process, the heat energy does not need to be consumed, the accumulation of the red mud and the PAC is reduced in a larger sense, and the pollution to environments due to the emission of the red mud and the PAC waste residues is solved.

Description

technical field [0001] The invention relates to an unfired brick with polyaluminum chloride waste slag and red mud as main materials and a preparation method thereof, belonging to the technical field of comprehensive utilization of industrial solid waste resources and new building materials. Background technique [0002] Red mud is the waste residue produced during the production of alumina. It is red because it contains a large amount of iron oxide, so it is called red mud. The output of red mud varies with ore grade, production method and technical level. Most production plants produce 1.0-1.8 tons of red mud for every 1t of alumina produced. It is estimated that the red mud produced by the alumina industry in the world exceeds 6×10 7 t. The amount of red mud produced in my country's alumina production process exceeds 6 million tons every year, all of which are stored in the open air, and most of the dams of the storage yard are constructed with red mud. At present, pe...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B18/30
CPCY02W30/91
Inventor 岳钦艳岳东亭高宝玉何红桃张晓伟王小娟
Owner SHANDONG UNIV
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