Sulfur-containing waste residue environment-friendly building material product and preparation method thereof

An environmentally friendly and building materials technology, applied in the field of building materials, can solve problems such as low strength and poor durability, and achieve the effects of large specific surface area, improved bonding performance, and reduced costs

Inactive Publication Date: 2020-07-10
CHINA UNIV OF GEOSCIENCES (WUHAN) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide an environmentally friendly building material product containing sulfur waste residue and its preparation method, so as to at least overcome the disadvantages of low strength and poor durability of existing gypsum products

Method used

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  • Sulfur-containing waste residue environment-friendly building material product and preparation method thereof
  • Sulfur-containing waste residue environment-friendly building material product and preparation method thereof

Examples

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preparation example Construction

[0035] The present invention also provides a method for preparing an environmentally friendly building material product containing sulfur waste residue, comprising the following steps:

[0036] S1. Stir cement and desulfurized gypsum in a mixer according to the weight ratio of raw materials, and mix uniformly to obtain a dry mixture;

[0037] S2. Add water, curing agent A, and curing agent B to the dry mixture prepared in step S1 according to the weight ratio of raw materials, and mix and stir for 2 to 7 minutes to prepare a slurry;

[0038] S3. pouring the slurry prepared in step S2 into a mold, and performing static pressure molding to obtain a green body, the molding pressure is 10-60MPa, and the pressure holding time is 10s-3min;

[0039] S4. Put the green body prepared in step S3 into a standard box for curing, and demould, and obtain the sulfur-containing waste residue environmental protection building material product.

[0040] As an optional implementation, in step S4...

Embodiment 1

[0043] An environmentally friendly building material product containing sulfur-containing waste residues in this embodiment is composed of the following raw materials in parts by weight: 75 parts of desulfurized gypsum, 5 parts of cement, 0.1 part of curing agent A, 0.1 part of curing agent B, and 6 parts of water; wherein: The cement is ordinary Portland cement; the curing agent A is composed of the following raw materials in parts by weight: 80 parts of fly ash, 5 parts of nano silicon dioxide, and 5 parts of sodium hydroxide; the curing agent B is inorganic The silica-alumina gel is specifically composed of 30 parts of inorganic aluminum gel and 50 parts of inorganic silica gel.

[0044] The preparation method of the above-mentioned sulfur-containing waste residue environmental protection building material products in this embodiment comprises the following steps:

[0045] S1. Stir cement and desulfurized gypsum in a mixer according to the weight ratio of raw materials, and...

Embodiment 2

[0052] A sulfur-containing waste residue environmental protection building material product in this embodiment is composed of the following raw materials in parts by weight: 80 parts of desulfurized gypsum, 10 parts of cement, 0.2 parts of curing agent A, 0.2 parts of curing agent B, and 8 parts of water; wherein: The cement is sulfoaluminate cement; the curing agent A is composed of the following raw materials in parts by weight: 82 parts of fly ash, 6 parts of nano silicon dioxide, and 6 parts of sodium hydroxide; the curing agent B is sodium water glass.

[0053] The preparation method of the above-mentioned sulfur-containing waste residue environmental protection building material products in this embodiment comprises the following steps:

[0054] S1. Stir cement and desulfurized gypsum in a mixer according to the weight ratio of raw materials, and mix uniformly to obtain a dry mixture;

[0055] S2. Add water, curing agent A, and curing agent B to the dry mixture prepared...

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Abstract

The invention discloses a sulfur-containing waste residue environment-friendly building material product and a preparation method thereof. The formula comprises the following components by weight: 75-95 parts of desulfuration gypsum, 5-25 parts of cement, 0.1-0.6 part of a curing agent A, 0.1-0.6 part of a curing agent B and 6-15 parts of water. The preparation method specifically include: makingthe raw materials into a slurry, mixing the prepared slurry evenly, then performing injection molding, conducting static pressure forming under a pressure of 10-60MPa to obtain a green body, and maintaining the pressure for 10s-3min; and conducting curing and demolding to obtain the sulfur-containing waste residue environment-friendly building material product. According to the invention, the burden of industrial solid waste emission on the environment is greatly reduced, the cost is reduced, resource consumption is reduced, functionalization, greenization and value increment of the product are achieved while a large amount of desulfuration gypsum is consumed, and the sulfur-containing waste residue environment-friendly building material product has good economic benefits and social benefits.

Description

technical field [0001] The invention belongs to the technical field of building materials. More specifically, the invention relates to an environmentally friendly building material product containing sulfur waste residue and a preparation method thereof. Background technique [0002] Desulfurization gypsum is a by-product of desulfurization in coal-fired power plants. It is obtained by reacting quicklime or limestone with flue gas generated after coal combustion to remove sulfur dioxide in the flue gas. [0003] Desulfuration gypsum (English name Desulfuration Gypsum) is also known as flue gas desulfurization gypsum, sulfur gypsum or FGD gypsum. The main component is the same as natural gypsum, calcium sulfate dihydrate CaSO 4 2H 2 O, content >93%. The FGD process is a technology that uses lime-limestone to recover sulfur dioxide in the flue gas of coal or oil. This technology is to grind the lime-limestone into a slurry to make the 2 The flue gas passes through the sl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14B28B3/02C04B111/20C04B111/27
CPCB28B3/02C04B28/144C04B2111/20C04B2111/27C04B2201/50C04B7/02C04B22/0006C04B22/06C04B22/062C04B7/32C04B22/00C04B24/302
Inventor 段平郭亮刘新豪余文杰苏良刚周满春
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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