Bayer-process red mud foamed concrete blocking block and preparation method thereof

A technology of foam concrete and Bayer red mud, which is applied to ceramic products, other household utensils, sustainable waste treatment, etc., can solve the problems of high energy consumption, high production cost, and small amount of slag, and achieve low investment in products, Low cost, effective in solving pollution problems

Inactive Publication Date: 2013-12-25
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current technologies either consume too littl

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiments 1 to 2 are specific implementations of the Bayer process red mud foam concrete block and its preparation method of the present invention, wherein embodiment 1 is the best implementation. In performance testing: flexural and compressive strength refer to the cube compressive strength test method specified in GB / T17671-1999 "Cement Mortar Strength Test Method" and GB / T50081-2002 "Standard for Test Methods of Mechanical Properties of Ordinary Concrete".

[0029] Example 1

[0030] 1) Ingredients: Weigh 45% of Bayer process red mud, 20% of blast furnace water-quenched slag, 30% of cement, and 5% of magnesium oxychloride cementitious material according to the solid mass percentage;

[0031] 2) Mixing: Pour the weighed dry material into the mixer in turn and stir for 0.5~1min to make it fully mixed evenly, add water and stir for 3~6min according to the water-material mass ratio of 1:2 to make mortar;

[0032] 3) Foaming: Mix HTD-1 type composite foaming agent wi...

Embodiment 2

[0040] 1) Ingredients: Weigh 50% of Bayer process red mud, 20% of blast furnace water-quenched slag, 20% of cement, and 10% of magnesium oxychloride cementitious material according to the solid mass percentage;

[0041] 2) Mixing: Pour the weighed dry material into the mixer in turn and stir for 0.5~1min to make it fully mixed evenly, add water and stir for 3~6min according to the water-material mass ratio of 1:2 to make mortar;

[0042] 3) Foaming: Mix HTD-1 type composite foaming agent with quantitative water at a ratio of 1:25 and foam in the foam making machine. In the stirred slurry, the density is 800kg / m 3 Add the foam made by the foam maker and stir evenly;

[0043] 4) Pouring: pour the stirred mixture into the mold;

[0044] 5) Stand still: Slightly vibrate to completely fill the mold, and after scraping off the excess slurry on the mold, stop for 24 hours;

[0045] 6) Demoulding: After the slurry in the mold has formed strength, the demoulding process is carried ou...

Embodiment 3

[0050] 1) Ingredients: Weigh 50% of Bayer process red mud, 15% of blast furnace water-quenched slag, 20% of cement, and 15% of magnesium oxychloride cementitious material according to the solid mass percentage;

[0051] 2) Mixing: Pour the weighed dry material into the mixer in turn and stir for 0.5~1min to make it fully mixed evenly, add water and stir for 3~6min according to the water-material mass ratio of 1:2 to make mortar;

[0052] 3) Foaming: Mix HTD-1 type composite foaming agent with quantitative water at 1:28 and foam in the foam making machine. In the stirred slurry, the density is 800kg / m 3 Add the foam made by the foam maker and stir evenly;

[0053] 4) Pouring: pour the stirred mixture into the mold;

[0054] 5) Stand still: Slightly vibrate to completely fill the mold, and after scraping off the excess slurry on the mold, stop for 24 hours;

[0055] 6) Demoulding: After the slurry in the mold has formed strength, the demoulding process is carried out;

[0056...

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Abstract

The invention discloses a Bayer-process red mud foamed concrete blocking block and a preparation method thereof, belonging to the technical field of preparation of foamed concrete blocking blocks, and mainly relates to a Bayer-process red mud foamed concrete blocking block and a preparation method thereof. The Bayer-process red mud foamed concrete blocking block disclosed by the invention comprises the following components in percent by mass: 45%-55% of Bayer-process red mud, 15%-25% of blast furnace water-quenching slag, 15%-20% of cement and 5%-15% of magnesium oxychloride binding material. According to the preparation method, oil sludge sand is used as the main material and is subjected to the process steps of batching, mixing, foaming, strewing, de-molding and maintaining, so as to obtain the foamed concrete blocking block which is high in strength, light in weight and good in thermal insulation effect. Moreover, Bayer-process red mud is sufficiently utilized, so that the waste material is changed into things of value.

Description

technical field [0001] The Bayer method red mud foam concrete block and a preparation method thereof belong to the technical field of foam concrete block preparation. Background technique [0002] Red mud (mainly Bayer red mud, hereinafter referred to as red mud) is the polluting waste discharged from the aluminum industry when it extracts alumina. It turns red because it contains a large amount of iron oxide, so it is called red mud. Due to different ore grades, production methods and technical levels, about 1.0-1.8 tons of red mud will be discharged for every 1 ton of alumina produced. As the fourth largest producer of alumina in the world, China discharges millions of tons of red mud every year. A large amount of red mud cannot be fully and effectively utilized, and can only be piled up in a large area of ​​storage yard. The stacking of red mud not only occupies a large amount of land, but also consumes more yard construction and maintenance costs, and the alkali presen...

Claims

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Application Information

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IPC IPC(8): C04B28/32C04B38/02C04B18/30
CPCY02W30/91
Inventor 任京成李文浩房青松
Owner SHANDONG UNIV OF TECH
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