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Method for preparing artificial vesuvianite building block from Bayer red mud

A technology of Bayer red mud and volcanic stone is applied in the field of using Bayer red mud to produce artificial volcanic stone blocks, which can solve the problems of hindering the sustainable development of the aluminum industry, harming the natural environment, occupying a large amount of land, etc. Sound absorption and noise reduction, hearing environment, small investment effect

Inactive Publication Date: 2013-07-17
四川海吉尔环保科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Red mud is the solid waste discharged during the alumina production process. It is one of the main industrial wastes with large discharge volume, serious harm to the natural environment and difficult to use. It is named because its appearance color is similar to red soil; In 2006, my country's alumina output was about 9.5 million tons, and the discharge of red mud was about 10 million tons. Adding the cumulative accumulation over the years, the amount exceeded 100 million tons, and the utilization rate was only about 15%. At present, the world's annual About 60 million tons of red mud are discharged, and most of the red mud can only be stored by damming and intercepting. The storage of red mud not only takes up a lot of land, but also easily causes land alkalization and water pollution, and is also a waste of resources. , seriously hampering the sustainable development of the aluminum industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take sodium hydroxide content as 1%, SiO 2 Bayer red mud with a content of 18%, add surfactant stearic acid with a weight of 0.1% of the weight of Bayer red mud, and then mix the above materials with 10% coal fine powder and send them to a ball mill to grind them into a 150-mesh slurry Material; above-mentioned slurry is added clay by the ratio of 6:4, then add 1% leavening agent wood sawdust, 1% blowing agent hydrogen peroxide, 4% molding binder water glass; Adopt hydraulic molding machine to above-mentioned The ingredients are extruded and rolled into 600X240X12 (length, width, height) brick adobe; the prepared adobe is naturally dried to a moisture content of 7%, and the dried adobe is put into a tunnel kiln for firing. ℃ for 3 hours, and then the fired green body is transported to the cooling zone of the tunnel kiln for gradual cooling to 70 ℃, and finally the bulk density is 450 Kg / m 3 , water absorption 16.5%, cylinder compressive strength 1.218 Mpa, water conten...

Embodiment 2

[0027] Take sodium hydroxide content as 1%, SiO 2 Bayer red mud with a content of 32%, add surfactant benzenesulfonic acid with a weight of 0.3% of the weight of Bayer red mud, then mix the above material with 10% coal fine powder and send it to a ball mill to grind it into a 180-mesh slurry Material; the above slurry is added to clay in a ratio of 7:3, then add 3% leavening agent plant fiber, 1.5% foaming agent hydrogen peroxide, and 5% molding binder sulfurous acid pulp waste liquid; adopt hydraulic molding The above-mentioned ingredients are extruded by the machine and rolled into 600X180X12 (length, width, height) bricks; the prepared bricks are naturally dried to a moisture content of 6%, and the dried bricks are put into a tunnel kiln for firing , fired at 1200°C for 6 hours, and then the fired green body was transported to the cooling zone of the tunnel kiln for gradual cooling to 60°C, and finally the bulk density was 480 Kg / m 3 , water absorption 16%, cylinder compre...

Embodiment 3

[0029] Take sodium hydroxide content as 2%, SiO 2 Bayer red mud with a content of 38%, add surfactant benzenesulfonic acid with a weight of 0.5% of the weight of Bayer red mud, and then mix the above materials with 10% coal fine powder and send them to a ball mill to grind them into a 200-mesh slurry Material; the above-mentioned slurry is added to clay in a ratio of 8:2, then add 5% of the leavening agent plant fiber, 2% of the foaming agent hydrogen peroxide, and 6% of the forming binder sulfurous acid pulp waste liquid; adopt hydraulic molding The machine extrudes the above ingredients and rolls them into 320X240X120 (length, width, height) brick adobe; the prepared adobe is naturally dried to a moisture content of 5%, and the dried adobe is put into a tunnel kiln for firing , fired at 1400°C for 8 hours, and then the fired green body was transported to the cooling zone of the tunnel kiln for gradual cooling to 60°C, and finally the bulk density was 470Kg / m 3 , water absor...

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Abstract

The invention discloses a method for preparing an artificial vesuvianite building block from Bayer red mud. The method for preparing the artificial vesuvianite building block from Bayer red mud comprises the following steps of carrying out milling and slurrying of Bayer red mud, carrying out mixing and blank preparation, carrying out drying and sintering, and carrying out cooling. The method for preparing the artificial vesuvianite building block from Bayer red mud has a low investment cost and simple processes, realizes the preparation of the artificial vesuvianite building block which is a novel artificial non-metallic porous material vesuvianite building block, and provides a novel and reliable approach for Bayer red mud comprehensive utilization. Because of addition of fine coal powder, a leavening agent, a foaming agent and a molding binder in ingredients, a sintered blank has regular or irregular micro-apertures, small apertures and big apertures thereby forming the artificial vesuvianite building block which is a sponge-like ceramic building product. The artificial vesuvianite building block can absorb sound, reduce noise, improve a hearing environment, adjust air humidity by its unique breathing function and improve an ecological environment. Therefore, the artificial vesuvianite building block can be widely utilized for masonry building, floor building and wall decoration, and is an ideal, eco-friendly and energy-saving building and decorative material.

Description

technical field [0001] The invention relates to a comprehensive utilization method of Bayer red mud tailings, in particular to a method for producing artificial volcanic stone blocks by using Bayer red mud. Background technique [0002] Natural volcanic stone (commonly known as pumice or porous basalt) is a functional environmental protection material. It is a very precious porous stone formed by volcanic glass, minerals and air bubbles after a volcanic eruption. It has many pores, light weight, high strength, heat preservation, With the advantages of heat insulation, sound absorption, fire prevention, acid and alkali resistance, corrosion resistance, no pollution, no radioactivity, etc., it can be widely used in indoor, external wall and floor decoration, replacing traditional natural stone and artificial ceramic tiles, and can also be widely used in municipal Squares, roads and roadbed masonry and solid wall masonry of housing construction, etc. Therefore, it is an ideal n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/132C04B38/02
CPCY02P40/69Y02P40/60
Inventor 邹健彪
Owner 四川海吉尔环保科技发展有限公司
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