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High-doping ratio red mud sintered brick and preparation method thereof

A high-volume, sintered brick technology, applied in the field of building materials, can solve the problems of low utilization rate of red mud, difficult to realize industrialization, complicated process, etc., and achieve the effect of low production cost, high dosage and simple process flow

Inactive Publication Date: 2013-09-25
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above studies can solve some problems, they either have low utilization rate of red mud or complex procedures, making it difficult to realize industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1 of the present invention: preparation of high-volume red mud sintered bricks, calculated in parts by weight, 40 parts of Bayer process red mud, 40 parts of construction waste (CaO mass percentage content is 25%), 19.2 parts of glass waste and 0.8 parts of barium carbonate waste, mix the barium carbonate waste with red mud, carry out the first aging, the aging time is 10 hours, then mix the mixture after the first aging with the finely ground construction waste and glass waste Mix evenly, add water accounting for 25% of the total weight of the above-mentioned components to the second mixture, and carry out the second aging. The aging time is 2 days, and then the mixture after the second aging is pressed The wet billet is prepared by molding, the molding pressure of compression molding is 1Mpa, and the pressure holding time is 10 minutes; the wet billet is dried at 50°C for 2 hours, and then fired at 950°C for 1 hour to obtain sintered Finished bricks.

[0019]...

Embodiment 2

[0020] Example 2 of the present invention: preparation of high-volume red mud sintered bricks, calculated in parts by weight, taking 40 parts of red mud from mixed-linking method, 40 parts of construction waste (CaO mass percentage content is 32%), and 19.2 parts of glass waste And 0.8 parts of barium carbonate waste, mix the barium carbonate waste with red mud, carry out the first aging, the aging time is 5 hours, then mix the mixture after the first aging with the ground construction waste and glass The waste is mixed evenly, and the water that accounts for 23% of the total weight of the above-mentioned components is added to the second mixture, and the second aging is carried out. The aging time is 4 days, and the mixture after the second aging is used The wet billet was prepared by press molding, the molding pressure of press molding was 3Mpa, and the holding time was 2 minutes; the wet billet was dried at 100°C for 0.6 hours, and then calcined at 700°C for 2.5 hours to obt...

Embodiment 3

[0022] Example 3 of the present invention: preparation of high-volume red mud sintered bricks, calculated in parts by weight, 50 parts of sintered red mud, 35 parts of construction waste (CaO mass percentage content is 20%), 14 parts of glass waste and 1 part of barium carbonate waste, mix the barium carbonate waste with red mud, carry out the first aging, the aging time is 20 hours, then mix the mixture after the first aging with the finely ground construction waste and glass waste Mix well, add water accounting for 27% of the total weight of the above components to the second mixture, and carry out the second aging. The aging time is 0.5 days, and then the mixture after the second aging is pressed The wet billet is prepared by molding, the molding pressure of compression molding is 3Mpa, and the holding time is 5 minutes; the wet billet is dried at 80°C for 2 hours, and then fired at 800°C for 2 hours to obtain sintered Finished bricks.

[0023] The finished product of Exam...

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PUM

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Abstract

The invention discloses a high-doping ratio red mud sintered brick and a preparation method thereof. The high-doping ratio red mud sintered brick comprises, by weight, 30 to 70 parts of red mud, 10 to 40 parts of waste building materials, 14 to 30 parts of waste glass materials, 0.5 to 1 part of waste barium carbonate materials and water, wherein the weight of the water is 23 to 27% of the total weight of the above materials. The preparation method utilizes a plurality of waste materials as raw materials, and prepares the raw materials into fired bricks having performances satisfying qualified product or first-grade product requirements in the national standard by a suitable processing method. The high-doping ratio red mud sintered brick has a high red mud addition amount, low energy consumption and radioactivity below the national standard. The high-doping ratio red mud sintered brick is prepared from the raw materials having wide sources, belongs to the field of waste utilization and avoids secondary pollution. The preparation method has simple processes and a low production cost, can be industrialized easily and has very ideal use effects.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a high-volume red mud sintered brick and a preparation method thereof. Background technique [0002] Red mud is the polluting waste residue discharged during the alumina production process. On average, 1-2 tons of red mud is produced for every 1 ton of alumina produced. my country, as the world's fourth largest producer of alumina, discharges more than 5.5 million tons of red mud every year. . At present, one of the characteristics of red mud is large discharge and extremely low comprehensive utilization rate. With the annual increase of alumina production in my country and the gradual decrease of bauxite grade, the annual output of red mud will continue to increase. It is estimated that by 2015, the cumulative stockpiling of red mud in my country will reach 350 million tons. The wet storage or dehydration and drying treatment of red mud reservoirs (dams) that are often used no...

Claims

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Application Information

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IPC IPC(8): C04B30/00B09B3/00
CPCY02W30/58
Inventor 王家伟赵平源吕常胜
Owner GUIZHOU UNIV
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