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Method of preparing aerated concrete by utilizing water-quenched manganese slag

A technology for air-entrained concrete and water-quenched manganese slag, which can be used in climate sustainability, sustainable waste treatment, solid waste management, etc., and can solve problems such as easy loss and pollution of water quality.

Active Publication Date: 2014-07-16
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of the economy, a series of social, economic and environmental problems caused by the discharge of water-quenched manganese slag have begun to emerge. On the one hand, landfills occupy a large amount of land; It is easy to lose and pollute the water quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Ingredients by weight percentage: cement 15%, lime 13%, water-quenched manganese slag 27%, silica sand 42%, gypsum 3%, water-material ratio is 0.49, aluminum powder is 0.12% of the total weight of dry material.

[0016] (2) Dry the water-quenched manganese slag until the moisture content is less than 1%, put it into a ball mill and grind it until the specific surface area is 415m 2 / Kg, silica sand is ground in a ball mill to a specific surface area of ​​335 m 2 / Kg, lime milled to a specific surface area of ​​380 m 2 / Kg.

[0017] (3) Mix the manganese slag, silica sand, cement and gypsum obtained in step (2), add water and stir together for 3 minutes to obtain a mixed slurry.

[0018] (4) Add the lime obtained in step (2) to the mixed slurry obtained in step (3) and stir for 5 minutes, then add aluminum powder with a total weight of 0.12% of the dry material and stir for 30 seconds to obtain a well-mixed mixture. Then pour the evenly mixed mixture into the conc...

Embodiment 2

[0022] (1) Ingredients by weight percentage: cement 14%, lime 15%, water-quenched manganese slag 25%, silica sand 43%, gypsum 3%, water-material ratio is 0.5, aluminum powder is 0.12% of the total weight of dry material.

[0023] (2) Dry the water-quenched manganese slag until the moisture content is less than 1%, put it into a ball mill and grind it until the specific surface area is 415m 2 / Kg, silica sand is ground in a ball mill to a specific surface area of ​​335 m 2 / Kg, lime milled to a specific surface area of ​​380 m 2 / Kg.

[0024] (3) Mix the manganese slag, silica sand, cement and gypsum obtained in step (2), add water and stir together for 3 minutes to obtain a mixed slurry.

[0025] (4) Add the lime obtained in step (2) to the mixed slurry obtained in step (3) and stir for 5 minutes, then add aluminum powder with a total weight of 0.12% of the dry material and stir for 30 seconds to obtain a well-mixed mixture. Then pour the evenly mixed mixture into the concr...

Embodiment 3

[0029] (1) Ingredients by weight percentage: cement 13%, lime 17%, water-quenched manganese slag 23%, silica sand 44%, gypsum 3%, water-material ratio is 0.51, aluminum powder is 0.12% of the total weight of dry material.

[0030] (2) Dry the water-quenched manganese slag until the moisture content is less than 1%, put it into a ball mill and grind it until the specific surface area is 415m 2 / Kg, silica sand is ground in a ball mill to a specific surface area of ​​335 m 2 / Kg, lime milled to a specific surface area of ​​380 m 2 / Kg.

[0031] (3) Mix the manganese slag, silica sand, cement and gypsum obtained in step (2), add water and stir together for 3 minutes to obtain a mixed slurry.

[0032] (4) Add the lime obtained in step (2) to the mixed slurry obtained in step (3) and stir for 5 minutes, then add aluminum powder with a total weight of 0.12% of the dry material and stir for 30 seconds to obtain a well-mixed mixture. Then pour the evenly mixed mixture into the conc...

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Abstract

The invention discloses a method of preparing aerated concrete by utilizing water-quenched manganese slag. Materials are as follows in percent by weight: 13%-15% of cement, 13%-17% of lime, 23%-27% of water-quenched manganese slag, 42%-44% of silica sand and 2%-3% of gypsum, wherein ratio of water to material is 0.49-0.51, and aluminum powder accounts for 0.12% of the total weight of the dry materials. The water-quenched manganese slag aerated concrete building block is completed by processes such as material stirring, casting, gas-forming, cutting, autoclaved-curing, and the like, wherein the autoclaved curing system is as follows: heating for 2.5 hours until atmospheric pressure reaches 1.2 mpa-1.25 mpa, keeping temperature and pressure constant for 6.5 hours, cooling and reducing the pressure for 2 hours to the normal temperature and the normal pressure, wherein the finally obtained product has oven-dry compressive strength of over 3.5 MPa, desiccated bulk density of 607 Kg / m<3>-615Kg / m<3>, and satisfies requirements of national B06-level aerated concrete qualified products. The method disclosed by the invention not only provide the aerated concrete products with reasonable price for the building market, but also finds a novel utilization way for water-quenched manganese slag.

Description

technical field [0001] The invention relates to a method for preparing air-entrained concrete by using water-quenched manganese slag, which belongs to the technical field of building materials. Background technique [0002] Under the environment of my country's rapid economic development, the increasing demand for manganese and manganese alloy series products stimulates the mining and utilization of manganese ore resources, and what follows is the discharge of a large amount of manganese-containing waste slag after smelting. Water-quenched manganese slag is a granular particle formed by quenching the discharged slag with water during the high-temperature smelting process of ferromanganese alloy. It is also called manganese slag because of the high content of manganese oxide, and its quantity is about 2-2.5 times the output of ferromanganese alloy. , although the water-quenched manganese slag has potential hydraulic and pozzolanic properties after water-quenching and quenchin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/14C04B14/06C04B22/14C04B22/04
CPCY02W30/91
Inventor 陈平姜晗刘荣进韦家崭赵艳荣邹小平
Owner GUILIN UNIVERSITY OF TECHNOLOGY