Method for producing high-strength environment-friendly whitewash gypsum by using desulfurization gypsum

Abstract

The invention relates to a method for producing high-strength environment-friendly whitewash gypsum by using desulfurization gypsum. The method comprises the following steps of: firstly, frying the desulfurization gypsum into desulfurization building gypsum with Beta-type semi-hydrated gypsum as the main component, and grinding the desulfurization building gypsum till the specific surface area is 2000-2500cm / g, thus obtaining modified desulfurization building gypsum; and secondly, sequentially doping 0.5-0.6 percent of set retarder and 0.2-0.4 percent of water retention agent into the modified desulfurization building gypsum obtained in the first step according to mass percentage, mixing evenly and then packaging the mixture, thus obtaining the finished product. By grinding and modifying the fried desulfurization building gypsum, the method changes the particle grading distribution of the desulfurization building gypsum and effectively improves the physical properties such as the water retention property, the strength and the like of the whitewash gypsum; the utilization of the muscle protein type gypsum set retarder for adjusting the setting time greatly reduces the strength loss caused by the prolonging of the setting time; and the product obtained according to the method meets environmental protection requirements.

Description

technical field

[0001] The invention relates to a production method of plastering gypsum, in particular to a method for producing high-strength and environment-friendly plastering plaster by using desulfurized gypsum. Background technique

[0002] Desulfurization gypsum is the wet flue gas desulfurization product of large and medium-sized power plants. At present, the annual emission of desulfurization gypsum in my country has reached 10 million tons. The use of desulfurization gypsum to produce plaster plaster has rich resource advantages, and plaster plaster has low energy consumption and convenient construction. , fine plastering layer, good living comfort and fire resistance, etc., is a wall plastering material with good development prospects.

[0003] Due to the fine particle size of desulfurized gypsum, 90% of it is concentrated below 70μm, and the specific surface area is usually 1400-1600cm 2 / g, with high fineness, so desulfurized gypsum can be used directly after f...

Examples

Embodiment 1

[0025] Embodiment 1 A kind of method utilizing desulfurization gypsum to produce high-strength environment-friendly plaster plaster, comprises the following steps:

[0026] (1) Fry the desulfurized gypsum in the fluidized furnace (specification / model T300-2000×2500) of Jingtai Jinlong Building Materials Co., Ltd. at a temperature of 160-180°C for 80-90 minutes, and fry it into β-type hemihydrate gypsum. The main component is desulfurized building gypsum; the prepared desulfurized building gypsum is ground to a specific surface area of ​​2000-2100 cm 2 / g to obtain modified desulfurized building gypsum; the modified desulfurized building gypsum meets the technical index requirements specified in GB / T9776-2008 "Building Gypsum" in Building Gypsum S3.0GB / T9776-2008.

[0027] (2) Get 100kg of modified desulfurized building gypsum obtained in step (1), then add 0.5kg of retarder and 0.2kg of water retaining agent successively, and put it into a mixer (DSH of Wuxi Hengguang Powder E...

Embodiment 2

[0029] Embodiment 2 A kind of method utilizing desulfurization gypsum to produce high-strength environment-friendly plaster plaster, comprises the following steps:

[0030] (1) Put the desulfurized gypsum into the boiling furnace, and fry it at a temperature of 160-180°C for 80-90 minutes, and fry it into a desulfurized building gypsum with β-type hemihydrate gypsum as the main component; the prepared desulfurized building gypsum Grind by a pulverizer until the specific surface area is 2100-2300cm 2 / g to obtain modified desulfurized building gypsum; the modified desulfurized building gypsum meets the technical index requirements specified in GB / T9776-2008 "Building Gypsum" in Building Gypsum S3.0GB / T9776-2008.

[0031] (2) Take 100kg of the modified desulfurized building gypsum obtained in step (1), then add 0.6kg of retarder and 0.4kg of water-retaining agent in turn, put it into the mixer and stir for 10 minutes, press the 40kg / bag. Wherein the mass ratio of modified star...

Embodiment 3

[0033] Embodiment 3 A kind of method utilizing desulfurization gypsum to produce high-strength environment-friendly plastering gypsum, comprises the following steps:

[0034] (1) Put the desulfurized gypsum into the boiling furnace, and fry it at a temperature of 160-180°C for 80-90 minutes, and fry it into a desulfurized building gypsum with β-type hemihydrate gypsum as the main component; the prepared desulfurized building gypsum Grinding by a pulverizer until the specific surface area is 2300-2400cm 2 / g to obtain modified desulfurized building gypsum; the modified desulfurized building gypsum meets the technical index requirements specified in GB / T9776-2008 "Building Gypsum" in Building Gypsum S3.0GB / T9776-2008.

[0035] (2) Take 100kg of the modified desulfurized building gypsum obtained in step (1), then add 0.55kg of retarder and 0.3kg of water-retaining agent in turn, put it into the mixer and stir for 10 minutes, press the 40kg / bag. Wherein the mass ratio of modifie...

technical field

[0001] The invention relates to a production method of plastering gypsum, in particular to a method for producing high-strength and environment-friendly plastering plaster by using desulfurized gypsum. Background technique

[0002] Desulfurization gypsum is the wet flue gas desulfurization product of large and medium-sized power plants. At present, the annual emission of desulfurization gypsum in my country has reached 10 million tons. The use of desulfurization gypsum to produce plaster plaster has rich resource advantages, and plaster plaster has low energy consumption and convenient construction. , fine plastering layer, good living comfort and fire resistance, etc., is a wall plastering material with good development prospects.

[0003] Due to the fine particle size of desulfurized gypsum, 90% of it is concentrated below 70μm, and the specific surface area is usually 1400-1600cm 2 / g, with high fineness, so desulfurized gypsum can be used directly after f...

Examples

Embodiment 1

[0025] Embodiment 1 A kind of method utilizing desulfurization gypsum to produce high-strength environment-friendly plaster plaster, comprises the following steps:

[0026] (1) Fry the desulfurized gypsum in the fluidized furnace (specification / model T300-2000×2500) of Jingtai Jinlong Building Materials Co., Ltd. at a temperature of 160-180°C for 80-90 minutes, and fry it into β-type hemihydrate gypsum. The main component is desulfurized building gypsum; the prepared desulfurized building gypsum is ground to a specific surface area of ​​2000-2100 cm 2 / g to obtain modified desulfurized building gypsum; the modified desulfurized building gypsum meets the technical index requirements specified in GB / T9776-2008 "Building Gypsum" in Building Gypsum S3.0GB / T9776-2008.

[0027] (2) Get 100kg of modified desulfurized building gypsum obtained in step (1), then add 0.5kg of retarder and 0.2kg of water retaining agent successively, and put it into a mixer (DSH of Wuxi Hengguang Powder E...

Embodiment 2

[0029] Embodiment 2 A kind of method utilizing desulfurization gypsum to produce high-strength environment-friendly plaster plaster, comprises the following steps:

[0030] (1) Put the desulfurized gypsum into the boiling furnace, and fry it at a temperature of 160-180°C for 80-90 minutes, and fry it into a desulfurized building gypsum with β-type hemihydrate gypsum as the main component; the prepared desulfurized building gypsum Grind by a pulverizer until the specific surface area is 2100-2300cm 2 / g to obtain modified desulfurized building gypsum; the modified desulfurized building gypsum meets the technical index requirements specified in GB / T9776-2008 "Building Gypsum" in Building Gypsum S3.0GB / T9776-2008.

[0031] (2) Take 100kg of the modified desulfurized building gypsum obtained in step (1), then add 0.6kg of retarder and 0.4kg of water-retaining agent in turn, put it into the mixer and stir for 10 minutes, press the 40kg / bag. Wherein the mass ratio of modified star...

Embodiment 3

[0033] Embodiment 3 A kind of method utilizing desulfurization gypsum to produce high-strength environment-friendly plastering gypsum, comprises the following steps:

[0034] (1) Put the desulfurized gypsum into the boiling furnace, and fry it at a temperature of 160-180°C for 80-90 minutes, and fry it into a desulfurized building gypsum with β-type hemihydrate gypsum as the main component; the prepared desulfurized building gypsum Grinding by a pulverizer until the specific surface area is 2300-2400cm 2 / g to obtain modified desulfurized building gypsum; the modified desulfurized building gypsum meets the technical index requirements specified in GB / T9776-2008 "Building Gypsum" in Building Gypsum S3.0GB / T9776-2008.

[0035] (2) Take 100kg of the modified desulfurized building gypsum obtained in step (1), then add 0.55kg of retarder and 0.3kg of water-retaining agent in turn, put it into the mixer and stir for 10 minutes, press the 40kg / bag. Wherein the mass ratio of modifie...