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Method for preparing high-strength foam glass by utilizing red mud and waste glass

A foam glass and waste glass technology, which is applied in the field of preparing high-strength foam glass by using red mud and waste glass, can solve the problems of poor water resistance, low strength and short life, and achieves good dimensional stability, low thermal conductivity and small specific gravity. Effect

Active Publication Date: 2012-12-26
刘立强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the insulation materials commonly used in buildings are mostly polystyrene, polyurethane foam materials and foamed concrete, etc. The above materials have disadvantages such as flammability, low strength, poor water resistance, and short life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Put 2% of red mud, 95% of waste glass and 3% of carbon powder into a ball mill according to the mass percentage, and ball mill it to more than 150 mesh to obtain a powder batch material. Put the batch material into a high temperature resistant mold, and fire according to the following firing system: from room temperature to 700°C at a heating rate of 5°C / min, and hold for 30 minutes; then cool down to 500°C at a cooling rate of 20°C / min , keep warm for 30min, and then cool down to room temperature at a cooling rate of 0.2°C / min to obtain red mud foam glass.

Embodiment 2

[0017] According to the mass percentage, 40% red mud, 59.9% waste glass and 0.1% Na 2 CO 3 Put it into a ball mill and ball mill it to more than 150 mesh to obtain a powder batch material. Put the batch material into a high temperature resistant mold, and fire according to the following firing system: from room temperature to 750°C at a heating rate of 10°C / min, and keep for 25 minutes; then cool down to 550°C at a cooling rate of 15°C / min , keep warm for 30min, and then cool down to room temperature at a cooling rate of 0.5°C / min to obtain red mud foam glass.

Embodiment 3

[0019] Mix 15% red mud, 80% waste glass, 3% carbon powder and 2% Na by mass percentage 2 CO 3 Put it into a ball mill and ball mill it to more than 150 mesh to obtain a powder batch material. Put the batch material into a high temperature resistant mold, and fire according to the following firing system: from room temperature to 800°C at a heating rate of 15°C / min, and hold for 20 minutes; then cool down to 600°C at a cooling rate of 25°C / min , keep warm for 25min, and then cool down to room temperature at a cooling rate of 1°C / min to obtain red mud foam glass.

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Abstract

The invention relates to foam glass manufacturing method, in particular to a method for preparing high-strength foam glass by utilizing red mud and waste glass. The invention aims at providing a preparation method for high-strength red mud foam glass which utilizes solid wastes and reduces the foam glass production cost. According to the technical scheme, the method for preparing high-strength foam glass by utilizing red mud and waste glass comprises the steps: firstly mixing red mud, waste glass and foam agent, carrying out ball milling to obtain powder batch mixture, and then conducting foaming and annealing treatment to obtain high-strength red mud foam glass product, wherein the red mud is polluting waste slag exhausted when the aluminum oxide is extracted in aluminum industry. The method has the beneficial effects of massively applying solid wastes red mud and waste glass, being environment-friendly and energy-saving, and changing wastes into valuables, thereby having good social benefits and economic benefits.

Description

[0001] technical field [0002] The invention relates to a method for manufacturing foam glass, in particular to a method for preparing high-strength foam glass by utilizing red mud and waste glass. Background technique [0003] Red mud is the solid waste generated during the production of alumina from bauxite. For every ton of alumina produced, about 0.8~2.0t of red mud is produced. As the aluminum content of domestic bauxite decreases, the amount of red mud produced per ton of alumina is also increasing. It is estimated that by 2015, the cumulative stockpiles will reach 350 million tons. At present, the alumina industry continues to expand, and the amount of waste red mud produced is also increasing year by year. The stacking and discharge of a large amount of red mud not only takes up a lot of land and arable land, but also forms dust flying around the dried red mud, causing serious air pollution. . Red mud contains high alkali, which infiltrates into the surrounding w...

Claims

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Application Information

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IPC IPC(8): C03C11/00
Inventor 刘立强张淑国张全鹏
Owner 刘立强
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