Production technology of full-dry desulfurizing gypsum building material product

A technology of desulfurization gypsum and production process, which is applied in the field of production process of all-dry desulfurization gypsum building material products. It can solve the problems of no gypsum building material related technology, expansion screws can not be grasped tightly, and block density is not high. It achieves light weight, The effect of energy saving and low production cost

Inactive Publication Date: 2008-05-07
重庆金仓龙新型建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 1. The strength is low; the construction difficulty of rising the wall;
[0010] 2. Due to the addition of a release agent during production; the dust on the inner and outer walls is not sticky, and it will fall off in large pieces after half a year, which has caused great contradictions between suppliers and sellers;
[0011] 3. The density of the cast-molded blocks is not high, and even the expansion screws cannot be grasped tightly during the use of the wall; this increases the difficulty of home decoration;
[0012] 4. The density of the cast-molded blocks is small, which causes the wall surface to stand out during the use of the wall, which completely affects the aesthetics of the decorated wall surface, and there are many complaints from consumers;
[0013] According to the search of Chinese patents, there is no related technology for the production of gypsum building materials by the all-dry process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: the production method of solid gypsum brick by full-dry method desulfurization, comprises the following steps:

[0038] (1) Using desulfurized gypsum as raw material, dry and calcinate at a temperature of 180°C±10°C for 20 to 30 minutes; generate high-strength anhydrous gypsum powder and hemihydrate gypsum powder to form gypsum miscible powder;

[0039] (2) Add 15% water and 1.5% inorganic silicon coagulant to the mixed-phase powder obtained in step (1) and mix and stir; since one molecule of hemihydrate gypsum has only half part water, the mixed water liquid added is also only half part Water, so that the powder after stirring is still powdery.

[0040] (3) Transport the mixed dry powder into the paving machine, and the paving machine will spread the powder according to the thickness of the solid brick;

[0041] (4) Press compact large embryo bricks, and then cut them with gang saws to obtain gypsum solid bricks of required specifications, and complete t...

Embodiment 2

[0042] Example 2: Take the material from the phosphogypsum powder pile, send it to a dry calciner for calcination, the temperature is 220°C ± 10°C, and the time is 15-25 minutes to produce qualified mixed-phase powder. Use after homogenization, the homogenized powder is transported to the mixer, add 20% water and 5% coagulant waterproofing agent (that is, 1%-5% inorganic silicon waterproofing agent) to the hemihydrate gypsum and mix; make the stirred The powder is still powdery. Transport the mixed dry powder into the paving machine, and the paving machine will spread the powder according to the model of the block, and send the blank material into the press, and use high pressure, that is, 50 kg / cm 2 The pressure makes it shape, and the required high-strength gypsum hollow block is obtained.

Embodiment 3

[0043] Embodiment 3: The chemical gypsum powder that the raw material is piled up is sent into a dry calciner for calcination, the temperature is 300° C., and the time is 10-15 minutes, and the qualified mixed-phase powder is produced; it is passed through a 40-mesh sieve, and 15 % water, 2.5% polyvinyl alcohol coagulant and 1%-2% inorganic silicon waterproofing agent are mixed and stirred; the powder after stirring is still powdery. The dry powder that has been mixed according to the quantity is transported into the paving machine, and the paving machine spreads the powder according to the thickness of the solid brick, and sends the blank material into the press, and shapes it with high pressure, that is, 30 kg / cm2; The tightly pressed large embryo bricks are cut by gang saws to obtain the required high-strength gypsum solid bricks.

[0044]The desulfurized gypsum or phosphogypsum wall solid brick of the invention has the characteristics of high strength, smooth surface, smal...

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Abstract

The invention relates to a production technique of a total drying desulfurizing gypsum building material product, which comprises the following steps: desulfurizing gypsum, phosphor gypsum or natural gypsum are taken as the raw materials, through roasting, sieving, adding water and inorganic silicon water repellent compound, the raw materials are still dry powder; then the gypsum building material product with high consistency is obtained through installing by a paver and shaped by high pressure. The product has high strength, good rigidity, without shrinkage and no need of release agent. The gypsum product needs no drying to produce and greatly saves energy, and the energy-saving effect is good. The gypsum product having simple production technique saves energy consumption without discharge of contamination, and has no poison and damage with very low production cost. The invention can completely satisfy various requirements of users.

Description

technical field [0001] The invention relates to a process for producing high-strength gypsum solid bricks, energy-saving hollow blocks, gypsum fiber boards and other building material products by using desulfurized gypsum from industrial waste residues as raw materials and adopting an all-dry method. Background technique [0002] Desulfurization gypsum, the waste generated after desulfurization of soot in power plants, has not been well utilized at present. The continuous increase of these wastes not only occupies the site, but also pollutes the environment, thus becoming a difficult problem for enterprises. For this reason, the country vigorously advocates the comprehensive utilization of chemical gypsum such as desulfurized gypsum and phosphogypsum from industrial waste residues. Simultaneously, the state has made legal provisions to prohibit the use of sintered clay solid red bricks as building materials in building construction. At present, the bricks made of gypsum pow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B11/02C04B11/26
CPCC04B28/14C04B28/142C04B2111/00017C04B28/144
Inventor 王安全
Owner 重庆金仓龙新型建材有限公司
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