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Phosphogypsum non-autoclaved and unburned hollow brick and preparation method thereof

A technology for phosphogypsum and hollow bricks, which is applied in the field of non-steaming and non-burning hollow bricks and its preparation, can solve the problems that the proportion of phosphogypsum components is not high, cannot be used on a large scale, and the comprehensive utilization rate is less than 10%, reaching Good thermal insulation, light weight, and cost reduction effects

Inactive Publication Date: 2009-04-01
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The research on the utilization of phosphogypsum in my country started in the 1960s, and it started relatively late. Moreover, due to the immature technology, high cost, and large secondary pollution, it has not been utilized on a large scale, and the comprehensive utilization rate is less than 10%.
[0009] The proportion of phosphogypsum components in the above processes is not high, and cement or various adhesives are mostly used as auxiliary materials, and the cost is relatively high

Method used

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  • Phosphogypsum non-autoclaved and unburned hollow brick and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Grind 60% of phosphogypsum, 25% of fly ash, 8% of coal gangue, and 2% of yellow phosphorus slag (percentage by weight) (phosphogypsum and coal gangue need to be weathered naturally) to 100-160 mesh, add 5% of water and mix well Stirring, molding, demoulding, resting, palletizing, normal pressure natural curing, performance testing. Among them: resting time is 10-12 hours, normal pressure natural curing can be done indoors or outdoors, in the outdoor curing, sprinkle water on the 1st and 4th day after stacking to make the bricks absorb water to saturation, and the natural curing time is about 15-17 days .

[0029] The measured properties of the material are as follows:

[0030] Compressive strength 8.4Mpa;

[0031] Flexural strength 1.5Mpa

[0032] It meets the requirements of the standard "JC422-1991 (1996) Non-fired Ordinary Brick".

Embodiment 2

[0034] Grind 55% of phosphogypsum, 28% of fly ash, 7% of coal gangue, and 5% of yellow phosphorus slag (percentage by weight) to 100-160 meshes, then add 5% of water and mix evenly. Other procedures are the same as in Example 1. The measured product performance is as follows:

[0035] Compressive strength 8.6Mpa;

[0036] Flexural strength 1.8Mpa

[0037] It meets the requirements of the standard "JC422-1991 (1996) Non-fired Ordinary Brick".

Embodiment 3

[0039] After grinding 55% of phosphogypsum, 30% of fly ash, 8% of coal gangue, and 3% of yellow phosphorus slag (percentage by weight) to 100-160 meshes, add 4% of water and mix evenly. Other procedures are the same as in Example 1. The measured product performance is as follows:

[0040] Compressive strength 9.1Mpa;

[0041] Flexural strength 2.0Mpa

[0042] It meets the requirements of the standard "JC422-1991 (1996) Non-fired Ordinary Brick".

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Abstract

The invention provides an ardealite non-autoclave non-burned air brick and a preparation method thereof. The following raw materials by weight percentage are used for preparation: ardealite, 50-60%; fly ash, 25-35%; gangue, 5-15%; yellow phosphorus slag, 0-10%; water, 0-10%. The preparation method includes: after the ardealite, fly ash, gangue and yellow phosphorus slag are milled to 100-160 eye, and mixed evenly according to proportion, then stirring, shaping, demoulding, repose, stacking and natural maintenance at normal pressure are carried out sequentially. The preparation method is characterized in that: by fully utilizing the cementing properties produced by the interaction of the industrial waste residue, and the like, the produced products have high intensity, good heat retaining property and light weight; process is simple and cost is low. Ardealite, fly ash, gangue and yellow phosphorus slag are utilized uttermost, and secondary pollution is not produced, and a new way to comprehensive utilization of waste residue and energy conservation and emission reduction is created, especially the problem of stacking ardealite is solved, thus the environment is protected greatly.

Description

technical field [0001] The invention relates to a non-steaming and non-burning hollow brick prepared by using phosphogypsum as a raw material and a preparation method thereof. Background technique [0002] With the gradual reduction of my country's land area and the increasing demand for building materials, my country banned the production of clay solid bricks in 2000. Various fly ash bricks, slag bricks, lime-sand bricks and other new wall materials will be an inevitable trend in the development of building materials. [0003] Phosphogypsum is characterized as a hazardous solid waste, it is a by-product of wet-process phosphoric acid production, the main component is CaSO 4 2H 2 O, CaSO 4 1 / 2H 2 O, in addition to containing a small amount of phosphorus, fluorine, iron, aluminum, magnesium and organic matter. [0004] The research on the utilization of phosphogypsum in our country started in the 1960s, which started relatively late. Due to the immature technology, high ...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B18/08
CPCY02W30/91
Inventor 杨月红张慧娜赵健蓉宁平方祖国欧根能
Owner KUNMING UNIV OF SCI & TECH