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Autoclaved gypsum brick and its manufacturing method

A production method and technology of gypsum bricks, which are applied in the field of building materials, can solve the problems of high steam curing temperature and low product strength, and achieve the effects of low steam curing temperature, good quality and good performance

Active Publication Date: 2018-05-11
中盐安徽红四方新型建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies in the prior art, the present invention provides an autoclaved gypsum brick and its manufacturing method, which solves the technical problems of high steam curing temperature and low strength of the autoclaved gypsum brick products in the prior art

Method used

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  • Autoclaved gypsum brick and its manufacturing method
  • Autoclaved gypsum brick and its manufacturing method
  • Autoclaved gypsum brick and its manufacturing method

Examples

Experimental program
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Embodiment 1

[0031] The autoclaved gypsum brick in this embodiment comprises the following raw materials in weight percentage: 50% of phosphogypsum, 13% of calcium carbide slag, 10% of fly ash, 10% of slag powder, 4% of modifier, and the balance is sulfate saturated solution. The active agent is a mixture of silicon dioxide and aluminum oxide, wherein the mass ratio of silicon dioxide and aluminum oxide is 2:1, and the saturated solution of sulfate is the saturated solution of sulfate at normal temperature.

[0032] According to the percentage by weight of the raw materials of this embodiment, the production method of the autoclaved gypsum brick comprises the following steps:

[0033] S1. Select fresh phosphogypsum just out of the production workshop, place fresh phosphogypsum in low-pressure steam for steam curing pretreatment, steam curing at constant temperature and pressure, steam curing temperature is 110°C, and steam curing time is 12 hours;

[0034] S2. Weighing the phosphogypsum pr...

Embodiment 2

[0038] The autoclaved gypsum brick in this embodiment comprises the following raw materials in weight percentage: 70% of phosphogypsum, 10% of calcium carbide slag, 8% of fly ash, 8% of slag powder, 1% of modifier, and the balance is sulfate saturated solution. The active agent is a mixture of silicon dioxide and aluminum oxide, wherein the mass ratio of silicon dioxide to aluminum oxide is 4:1, and the saturated sulfate solution is a saturated sulfate solution at normal temperature.

[0039] According to the percentage by weight of the raw materials of this embodiment, the production method of the autoclaved gypsum brick comprises the following steps:

[0040] S1. Select fresh phosphogypsum just out of the production workshop, place the fresh phosphogypsum in low-pressure steam for steam curing pretreatment, steam curing at constant temperature and pressure, steam curing temperature is 130°C, and steam curing time is 18 hours;

[0041] S2. Weighing the phosphogypsum pretreate...

Embodiment 3

[0045]The autoclaved gypsum brick in this embodiment comprises the following raw materials in weight percentage: 52% of phosphogypsum, 15% of calcium carbide slag, 15% of fly ash, 12% of slag powder, 2% of modifying agent, and the balance is sulfate saturated solution. The active agent is a mixture of silicon dioxide and aluminum oxide, wherein the mass ratio of silicon dioxide and aluminum oxide is 2:2, and the saturated solution of sulfate is a saturated solution of potassium aluminum sulfate at normal temperature.

[0046] According to the percentage by weight of the raw materials of this embodiment, the production method of the autoclaved gypsum brick comprises the following steps:

[0047] S1. Select fresh phosphogypsum just out of the production workshop, place fresh phosphogypsum in low-pressure steam for steam curing pretreatment, steam curing at constant temperature and pressure, steam curing temperature is 115°C, and steam curing time is 14 hours;

[0048] S2. Weighi...

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Abstract

The invention provides an autoclaved gypsum brick and a preparation method thereof and relates to the technical field of building materials. The autoclaved gypsum brick is prepared from phosphogypsum, carbide slag, fly ash, slag powder, modifier, sulfate saturated solution, the invention solves the problems of high autoclaving temperature and low strength existing in the prior art of autoclaved gypsum brick production, the phosphogypsum content is increased to 65%, combined with the novel modifier and sulfate saturated solution and other components, the obtained autoclaved gypsum brick has the advantages of good performance, good quality, high strength, low autoclaving temperature, saving steam cost and energy.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an autoclaved gypsum brick and a manufacturing method thereof. Background technique [0002] Phosphogypsum is an industrial by-product of wet process production of phosphoric acid in the phosphating industry, and its main component is dihydrate gypsum (Ca 2 SO 4 2H 2 O), usually 85% to 95% of dihydrate gypsum in phosphogypsum. Phosphogypsum has a long history in my country, and the research on its comprehensive development and utilization has a history of decades. [0003] The research on the comprehensive utilization of phosphogypsum in my country began in the 1960s. The methods of comprehensive utilization of phosphogypsum mainly include the production of sulfuric acid co-production cement from phosphogypsum, the production of cement retarder from phosphogypsum, the production of building gypsum powder from phosphogypsum, and the production of gypsum from phosphog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/14
CPCC04B28/143C04B2201/50C04B18/04C04B18/08C04B18/141C04B22/06C04B22/142
Inventor 凌辉勋韩凯锋吴根水孙梦雅王国防王涛王军张维兵杨旭东和小刚
Owner 中盐安徽红四方新型建材科技有限公司