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High-strength waterproof gypsum plaster prepared from waste slag in the fluorine chemical industry and preparation method of the gypsum plaster

A plastering gypsum, water-resistant technology, which is applied in the field of building materials production, can solve the problems that the performance of gypsum products does not meet the requirements, the solubility of dihydrate gypsum is large, and the softening coefficient is low, and achieves compact structure, simple production technology and equipment, and low cost. Effect

Active Publication Date: 2014-03-12
HUNAN NONFERROUS ENVIRONMENTAL PROTECTION BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process, due to the increase of the calcination link, has high energy consumption, and its mechanism is to generate dihydrate gypsum by hydration of hemihydrate gypsum or anhydrite gypsum to generate strength, but dihydrate gypsum has high solubility, low strength, and poor water resistance (softening coefficient Low, usually around 0.2 ~ 0.3), resulting in the performance of gypsum products can not meet the requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Take the preparation of 100kg high-strength water-resistant plaster plaster as an example, and weigh the proportion according to the prescribed raw material formula. The dosage of each raw material is as follows:

[0045] 70kg of anhydrous fluorine gypsum with a fineness of 150 mesh,

[0046] Fineness 120 mesh water-quenched slag powder 20kg,

[0047] 5kg of silicon-containing pressure slag with a fineness of 210 mesh and a whiteness of 90,

[0048] Portland cement of grade 42.5 3kg,

[0049] Quicklime 1 with a fineness of 210 mesh and a calcium oxide content of 65%,

[0050] The fineness is 90 mesh industrial grade Na 2 SO 4 0.4kg,

[0051] The fineness is 90 mesh industrial grade K 2 SO 4 0.3kg,

[0052] Fineness 150 mesh polyvinyl alcohol powder 0.2kg,

[0053] Fineness 130 mesh methyl cellulose 0.1kg.

[0054] Put the above-mentioned raw material batches into a high-efficiency inclined ball mill, fully stir and grind until the fineness is 120 mes...

Embodiment 2

[0057] Take the preparation of 100kg high-strength water-resistant plaster plaster as an example, and weigh the proportion according to the prescribed raw material formula. The dosage of each raw material is as follows:

[0058] Fluorogypsum powder: 50kg

[0059] Water-quenched slag powder: 27kg

[0060] Silicon-containing pressure slag: 10 kg

[0061] Ordinary Portland cement: 10kg

[0062] Quicklime: 1.7kg

[0063] Sodium sulfate 0.2 kg

[0064] Potassium sulfate 0.6 kg

[0065] Polyvinyl alcohol powder: 0.3kg

[0066] Methylcellulose: 0.2kg

[0067] Put the above-mentioned raw material batches into a high-efficiency inclined ball mill, fully stir and grind until the fineness is 150 mesh, and then the dry powder of fluorine gypsum plastering material is obtained.

[0068] When in use, add 150% of quartz sand (measured by the dry powder mass of fluorogypsum plastering material).

Embodiment 3

[0070] Take the preparation of 100kg high-strength water-resistant plaster plaster as an example, and weigh the proportion according to the prescribed raw material formula. The dosage of each raw material is as follows:

[0071] Fluorogypsum powder: 60kg

[0072] Water-quenched slag powder: 20kg

[0073] Silicon-containing pressure slag: 10 kg

[0074] Ordinary Portland cement: 7kg

[0075] Quicklime: 1.7kg

[0076] Sodium sulfate 0.4kg

[0077] Potassium sulfate 0.5 kg

[0078] Polyvinyl alcohol powder: 0.3kg

[0079] Methylcellulose: 0.1kg

[0080] Put the above-mentioned raw material batches into a high-efficiency inclined ball mill, fully stir and grind until the fineness is 300 mesh, and then the dry powder of fluorine gypsum plastering material is obtained.

[0081] When used, 50%~100% of expanded perlite (measured by the volume of dry powder of fluorogypsum plastering material) is added.

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Abstract

The invention discloses a high-strength waterproof gypsum plaster prepared from waste slag in the fluorine chemical industry. The gypsum plaster is characterized by being prepared form following raw materials by weight: 50-99% of fluorine gypsum powder, 0-40% of an active admixture, 0-20% of silicon-containing pressure slag, 0.5-20% of an alkaline activator, 0.2-5% of a sulfate activator, 0.1%-1% of a tackifier and 0.05%-0.5% of a water-retaining agent. According to the gypsum plaster, the raw materials are easily available, production technology and equipment are simple, the cost is low, and the gypsum plaster has breathing functions. During construction, the gypsum plaster can be blended by using cold water, and is suitable for mechanical spraying, roller coating and brush coating. The gypsum plaster has strong covering power and can be thinly coated. Connection is firm and no powder falls. The gypsum plaster has good economic benefit, social benefit and environmental benefit.

Description

[0001] technical field [0002] The invention relates to the technical field of building material production, in particular to a high-strength water-resistant plaster plaster prepared from fluorine chemical waste residue and a preparation method thereof. Background technique [0003] At present, the total amount of fluorine gypsum waste slag discharged by my country's fluorine chemical enterprises is about 2.5 million tons every year. In addition, a large amount of silicon-containing pressure slag and iron-containing pressure slag are also discharged. Among them, except for a small amount of fluorine gypsum waste residue used as cement additives, most of the fluorine gypsum waste residue and other silicon-containing pressure slag are disposed of by stacking, paving or landfilling, which not only wastes resources and sites, but also pollutes the environment. [0004] Gypsum is a non-toxic, harmless and healthy material, which has the ecological function of breathing and can a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B11/26
Inventor 付立军陈建武
Owner HUNAN NONFERROUS ENVIRONMENTAL PROTECTION BUILDING MATERIALS
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