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Red mud raw material-based non-steamed brick and production method thereof

A technology that avoids steaming bricks and red mud is applied in sustainable waste treatment, solid waste management, climate sustainability, etc. It can solve the problems of low utilization rate of industrial waste residues, achieve simple production and process maintenance conditions, and improve gelation. Active, strong effect

Inactive Publication Date: 2015-08-19
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a non-steamed brick based on red mud raw material and its preparation method, to solve the problem of low utilization rate of red mud, slag, desulfurization ash and desulfurization gypsum industrial waste residue

Method used

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  • Red mud raw material-based non-steamed brick and production method thereof
  • Red mud raw material-based non-steamed brick and production method thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0025] The preparation method includes: drying process, weighing ingredients and grinding and mixing process, the specific method process is as follows:

[0026] (1) Drying process: Dry red mud, desulfurized ash, slag, lime, and desulfurized gypsum with a dryer to remove free water;

[0027] (2) Grinding process: put red mud into a ball mill and grind until the specific surface area is ≥600m 2 / kg;

[0028] (3) Weighing ingredients and mixing process: Weigh ingredients according to the above raw material formula, and then put the above three raw materials into a ball mill to mix and grind until the specific surface area is ≥ 600m 2 / kg;

[0029] (4) Raw material ratio and molding: red mud 70-80%; desulfurized ash 0-10%; slag 0-10%; lime 5%; desulfurized gypsum 8-10%; water glass 0-5%, plus water , the amount of water added accounts for 30-40% of the total amount of ingredients; fully stir in the mixer, pour into the mold, and place it on the vibrating table for compact mold...

Embodiment 1

[0033] Example 1: Experiments and performance tests were carried out with reference to the national standard "Test Methods for Wall Bricks" GB / T2542-92.

[0034] The raw materials used in the test were dried with a dryer and then ground, and then the ingredients were weighed and put into a ball mill for mixing. Put the mixture into the mixer and add 30-40% water, mix well, pour it into the mold, put it on the vibrating table for compact molding, and then perform standard curing for 1-3 days to demould, and finally transport the site for natural curing until 28 days. Finished products are available.

[0035] Table 1 Effects of different dosages on the mechanical properties of unburned bricks

[0036]

[0037] The qualified judgment value and classification of the mechanical properties of unburned bricks according to the national standard are shown in Table 2 below.

[0038] Table 2 Judgment criteria for strength grades

[0039] strength level

[0040] After 28 ...

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Abstract

The invention relates to a red mud raw material-based non-steamed brick and a production method thereof, and belongs to a building material wall brick and a production method thereof. The brick is produced by adopting industrial waste residue red mud as a main raw material, granular blast furnace slag micro-powder, lime and gypsum as auxiliary materials and water glass as an alkaline exciting agent. The red mud raw material-based non-steamed brick concretely comprises, by mass, 70-80% of the red mud, 0-10% of desulfurized ash, 0-10% of slag, 5% of lime, 8-10% of desulfurized gypsum and 0-5% of water glass. The method comprises the following steps: drying the above ingredients, grinding, weighing the ingredients, mixing according to above proportions, molding, and carrying out standard maintenance and natural maintenance. The above molding process is simple, and is characterized by direct casting vibration molding without pressurization, and the above natural maintenance process is characterized by normal-temperature rapid reaction solidification, and has the advantages of no sintering, and no steam or steam press maintenance. The non-steamed brick has the advantages of high compressive strength, strong drying shrinkage resistance, and no efflorescence phenomenon after long-term storage. The method massively using the industrial waste slag has the advantages of resource and energy saving, low cost and small energy consumption.

Description

technical field [0001] The invention relates to a building material wall brick and a preparation method thereof, in particular to a non-steaming brick based on red mud raw materials and a preparation method thereof. Background technique [0002] Since 2003, solid clay bricks have been banned in 170 domestic cities for a limited time, and it is imminent to study alternatives to solid clay bricks. Among them, unburned bricks have been vigorously developed because of their low production costs, superior performance, and good environmental benefits. A lot of research has been done on previous people. For example, Yue Yunlong and others used red mud and fly ash as raw materials and cement as a curing agent to make unburned bricks. The ingredients were: 60% alkali slag cement, 30% red mud, and Ash 10%, produced by pressure molding, the mechanical properties of unfired bricks obtained meet the national standard of fly ash bricks. Wang Mei and others have developed red mud fly ash ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26C04B28/14C04B18/30
CPCY02W30/91
Inventor 姬永生鲍忠正胡亦杰黄鹏吴萌朱蕊
Owner CHINA UNIV OF MINING & TECH
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