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A non-fired brick with red mud and magnesium slag as the main materials

A technology of unburned bricks and magnesia slag, applied in the fields of comprehensive utilization of resources and new building materials

Inactive Publication Date: 2011-12-14
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the research and application of using red mud and magnesium slag with high moisture content as the main raw materials, using industrial solid waste as auxiliary materials (non-industrial raw materials), completely utilizing waste, and adopting compression molding technology to produce unburned bricks for construction has not yet been done. see the report

Method used

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  • A non-fired brick with red mud and magnesium slag as the main materials

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Experimental program
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Effect test

Embodiment 1

[0029] Example 1 : To produce unfired bricks pressed and formed with red mud and magnesium slag as the main materials. The composition is red mud, magnesium slag, aggregate, and the dry basis mass ratio of red mud, magnesium slag, and aggregate is 45:40:15 , the aggregate is SiO 2 +Al 2 o 3 =85% boiling slag.

[0030] The red mud and magnesium slag are the main materials of the method of pressing and forming unburned bricks to produce unburned bricks. The red mud and magnesium slag are used as the main raw materials, and other industrial waste residues are used as aggregates. The mass ratio of red mud: magnesium slag: aggregate is 45: Prepare the mixture at 40:15, add process water to adjust the mass ratio of mixture to water to 100:30, and then go through the brick-making processes such as primary mixing, forced mixing, static pressure forming, billet stacking, and steam curing to obtain unburned bricks.

[0031] The red mud is the industrial waste of the sintering metho...

Embodiment 2

[0035] Example 2: Example 1: Production of unfired bricks that are pressed and formed with red mud and magnesium slag as the main materials. The components are red mud, magnesium slag, boiling slag, coal slag, and the dry weight of red mud, magnesium slag, boiling slag, and coal slag The ratio is 45:40:10:5, the aggregate is a mixture of boiling slag and cinder, SiO in the mixture 2 +Al 2 o 3 =67%.

[0036] The red mud and magnesium slag are the main materials of the method of pressing and forming unburned bricks. The red mud and magnesium slag are used as the main raw materials, and the boiling slag and coal slag are used as aggregates. Red mud: magnesium slag: boiling slag: coal slag = 45 : 40:15 mass ratio batching, add process water to adjust the mass ratio of mixture to water to 100:31, and then go through the brick making processes such as primary mixing, forced mixing, static pressure forming, stacking blanks, steam curing, etc., to obtain unfired brick.

[0037] ...

Embodiment 3

[0042] Example 3: Production of unfired bricks with red mud and magnesium slag as the main materials, which are composed of red mud, magnesium slag, and aggregate. The mass ratio of red mud, magnesium slag, and aggregate is 50:40:10, and the aggregate is SiO 2 +Al 2 o 3 =70% blast furnace slag.

[0043] The red mud used is the industrial waste slag produced in the alumina production process of the hybrid method, the magnesium slag is the industrial waste slag discharged from the production of metal magnesium by the Pidgeon method in the silicon thermal reduction method, and the process water added is the alkali-containing waste water recovered by the paper mill .

[0044] Magnesium slag pretreatment: Put the magnesium slag into a square basket without a top cover and with Φ3 small holes on each side. The square basket is placed on the maintenance trolley, and is sent to the steam curing kettle by the transfer vehicle, and is treated by 1.0MPa steam. After 3 hours, cool n...

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Abstract

The invention relates to a baking-free brick based on red mud and magnesium slag as main materials and belongs to the technical fields of novel building materials and comprehensive utilization of resources. The baking-free brick consists of red mud and aggregate, wherein the mass ratio of red mud to magnesium slag to aggregate is (45-50):(35-40):(10-15); the ratio of mixture to water is 100:(28-32); the aggregate is one or any mixture of more of industrial solid wastes such as boiled furnace slag, blast furnace slag, steel slag, coal slag, yellow phosphorus furnace slag, water gas gasifying slag and the like which are subjected to quick cooling at high temperature; and the content of SiO2 and Al2O3 in the aggregate is less than 65%. According to the invention, the baking-free brick is obtained by brick-manufacturing processes such as raw material pretreatment, mixing, static pressure formation, palletizing, steam curing and the like. According to the invention, the production process is simple, the energy consumption is low, and the product has the characteristics of high strength, high carbonization coefficient, high softening coefficient, low water absorption, damp and hot alternation resistance, good freezing resistance, no crystalline bloom and the like.

Description

technical field [0001] The invention relates to a method for producing unburned bricks by using red mud and magnesium slag, which belongs to the technical field of comprehensive utilization of resources and new building materials. Background technique: [0002] Red mud is the solid waste discharged during the alumina production process. According to the different alumina production processes, it is divided into sintering method, Bayer method and mixed method red mud. Due to the different alumina production methods and bauxite quality, the chemical composition, physical properties and mineral phases of red mud are different, but because of the high iron oxide content, its appearance color is similar to laterite, so it is generally called red mud. Regardless of sintering red mud or Bayer red mud, their common characteristics are alkali. Due to the existence of alkali, the utilization of red mud is very difficult, which is the main reason for the low utilization rate of red mu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/08C04B18/14C04B18/04
CPCY02W30/91
Inventor 夏举佩张召述师垒垒谷立轩
Owner KUNMING UNIV OF SCI & TECH
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