Autoclaved phosphogypsum brick and method for preparing same

A technology of gypsum bricks and phosphogypsum, which is applied in the field of autoclaved phosphogypsum bricks and its preparation, can solve the problems of low strength, low cost, and high strength of phosphogypsum bricks, and achieve the effects of low manufacturing cost, increased strength, and low quality requirements

Inactive Publication Date: 2010-03-31
SICHUAN HONGDA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of high cost and low strength of phosphogypsum bricks existing in the existing phosphogypsum comprehensive utilization technology, and provide an autoclaved phosphogypsum brick with low cost and high strength

Method used

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  • Autoclaved phosphogypsum brick and method for preparing same
  • Autoclaved phosphogypsum brick and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The autoclaved phosphogypsum brick provided in this embodiment is made from the following raw materials:

[0034]60kg of phosphogypsum, 7.8kg of calcium carbide slag, 30kg of zinc smelting slag, 2kg of construction sand with a particle size of <2mm, 0.2kg of Glauber’s salt, and 15kg of water.

[0035] The raw materials in the above ratio are prepared into autoclaved phosphogypsum bricks according to the steps of material preparation, batching, grinding, stirring, brick making and curing. Choose 5 autoclaved phosphogypsum bricks prepared in this example, according to the standard of GB / T 2542-2003 "Test Method for Wall-laying Bricks", carry out compression test with TYE-3000 pressure testing machine, the results are shown in Table 1.

Embodiment 2

[0037] The autoclaved phosphogypsum brick provided in this embodiment is made from the following raw materials:

[0038] Phosphogypsum 75kg, calcium carbide slag 3.9kg, fluidized furnace coal slag 20kg, construction sand with particle size <2mm 1kg, Glauber’s salt 0.1kg, water 11kg.

[0039] The raw materials in the above ratio are prepared into autoclaved phosphogypsum bricks according to the steps of material preparation, batching, grinding, stirring, brick making and curing. Choose 5 autoclaved phosphogypsum bricks prepared in this example, according to the standard of GB / T 2542-2003 "Test Method for Wall-laying Bricks", carry out compression test with TYE-3000 pressure testing machine, the results are shown in Table 1.

Embodiment 3

[0041] The autoclaved phosphogypsum brick provided in this embodiment is made from the following raw materials:

[0042] 80kg of gypsum, 3.9kg of lime slag, 15kg of chain grate furnace coal slag, 1kg of construction sand with a particle size of <2mm, 0.1kg of sodium sulfate, and 10kg of water.

[0043] The raw materials in the above ratio are prepared into autoclaved phosphogypsum bricks according to the steps of material preparation, batching, grinding, stirring, brick making and curing. Choose 5 autoclaved phosphogypsum bricks prepared in this example, according to the standard of GB / T 2542-2003 "Test Method for Wall-laying Bricks", carry out compression test with TYE-3000 pressure testing machine, the results are shown in Table 1.

[0044] Table 1 Compression test results of phosphogypsum unburned bricks

[0045]

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Abstract

The invention discloses an autoclaved phosphogypsum brick completely prepared by industrial waste residues and a method for preparing the same and belongs to the technical field of construction materials. The autoclaved phosphogypsum brick is prepared from the following raw materials in part by weight: 60 to 80 parts of phosphogypsum, 3.9 to 7.8 parts of neutralization modifying agent, 15 to 30 parts of activated admixture, 1 to 2 parts of cementing aggregate, 0.1 to 0.2 part of exciting agent and 10 to 15 parts of water, wherein the neutralization modifying agent is carbide slag or lime slag;the activated admixture is one or more of zinc smelting granulated slag, fluidized bed furnace fire coal slag and grate furnace fire coal slag; the cementing aggregate is construction sand; and the exciting agent is glauber salt or sodium sulfate. The compressive strength of the autoclaved phosphogypsum brick disclosed in the invention reaches 15 to 20MPa.

Description

technical field [0001] The invention discloses an autoclaved phosphogypsum brick made entirely of industrial waste residue and a preparation method thereof, belonging to the technical field of building materials. Background technique [0002] In the process of smelting or chemical production, a large amount of industrial waste residue will be produced, such as phosphogypsum produced by the phosphorus chemical industry, zinc smelting slag produced by zinc smelting equipment, calcium carbide slag produced by calcium carbide plant, and fluidized fluidized furnace left by coal-fired fluidized calciner Coal-fired slag, coal-fired chain grate furnace coal slag left over from coal-fired chain grate furnace, etc. The comprehensive utilization of industrial waste slag is a huge and complex system engineering. With the continuous development of the chemical industry, the pressure on the treatment of industrial waste slag is increasing, especially the treatment pressure of phosphogypsu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E04C1/40C04B28/14B28B3/00B28B11/24
CPCC04B28/143C04B2201/52Y02W30/91C04B14/06C04B18/0481C04B18/141C04B18/144C04B22/147C04B40/024C04B18/067
Inventor 蒲中云陈维贵马功富杨守明罗万林钟显刚易遵礼
Owner SICHUAN HONGDA
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