CN101774773B - Method for producing alpha-gypsum by using desulphurization gypsum or citric acid gypsum - Google Patents
Method for producing alpha-gypsum by using desulphurization gypsum or citric acid gypsum Download PDFInfo
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- CN101774773B CN101774773B CN2010101022211A CN201010102221A CN101774773B CN 101774773 B CN101774773 B CN 101774773B CN 2010101022211 A CN2010101022211 A CN 2010101022211A CN 201010102221 A CN201010102221 A CN 201010102221A CN 101774773 B CN101774773 B CN 101774773B
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- gypsum
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- desulfurated plaster
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- acid gypsum
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Abstract
The invention discloses a method for producing alpha-gypsum by using desulphurization gypsum or citric acid gypsum. The producing method comprises the following steps: mixing the desulphurization gypsum or the citric acid gypsum, water and coal crystallizing agent according to a certain proportion, slurrying, reacting, drying, pulverizing and modifying, ageing and homogenizing to obtain a high-strength ultra-hard alpha-gypsum finished product. The produced high-strength ultra-hard alpha-gypsum can be made into multiple high-grade gypsum dies or high-grade building and decorative materials and the like, and has the advantages of good liquidity, strong simulation property, high strength, smooth surface and the like.
Description
Technical field
The present invention relates to a kind of method of utilizing desulfurated plaster or citric acid gypsum to produce α-gypsum.
Background technology
Chemical gypsum (desulfurated plaster, citric acid gypsum etc.) be from now to future for a long time in one of the main raw material(s) of building materials of gypsum.Desulfurated plaster is that the flue gas that produces behind the sulfur-bearing fired coal combustion carries out that desulfurizing and purifying is handled and the industrial solid Litter that obtains.Citric acid gypsum is the waste residue that in producing the Hydrocerol A process, produces, and can not get effective utilization for a long time always, too much all as waste dump, environment is caused serious pollution.
SO
2Pollute and surpass the first pollutent that smoke contamination becomes atmospheric environment.Flue gas desulfurization (FGD) is control acid rain and SO
2The most effective and major technology means of polluting.
At present, all pay much attention to flue gas desulfurization countries in the world, in order to implement energy-saving and emission-reduction; Improve the solid waste comprehensive utilization of resources; Protection and improve environment, it is still blank in China to utilize desulfurated plaster or citric acid gypsum to produce α-high-strength super hard gypsum technology, has vast potential for future development.
Summary of the invention
The technical issues that need to address of the present invention just are to overcome the defective of prior art; A kind of method of utilizing desulfurated plaster or citric acid gypsum to produce α-gypsum is provided; α-gypsum of producing; Have high-strength superhard characteristics, can do multiple high-grade gypsum mold or top-grade building and finishing material etc., have good fluidity, advantages such as emulation property is strong, intensity is high, smooth surface.
For addressing the above problem, the present invention adopts following technical scheme:
A kind of method of utilizing desulfurated plaster or citric acid gypsum to produce α-high-strength super hard gypsum of the present invention, said working method comprises the following steps:
Carry out making finished product α-high-strength super hard gypsum after slurrying, reaction, drying, grinding modification, ageing, the homogenizing after the brilliant agent of desulfurated plaster or citric acid gypsum, water and coal mixed by the regulation proportioning.
The weight part proportioning of raw material is in the said pulping reaction step: desulfurated plaster or citric acid gypsum are 6～9 parts; Water is 11～14 parts; The consumption of the brilliant agent of coal is 0.32%～0.36% of desulfurated plaster or a citric acid gypsum weight; Slurrying afterreaction temperature is 135 ℃～150 ℃, reaction pressure 3.5～4.5Mpa, and the reaction times is 80min～105min.
In the said desulfurated plaster terra alba weight content greater than 92%, the weight content of calcium sulfite is lower than 0.5%; The terra alba weight content is greater than 95% in the said citric acid gypsum.
The brilliant agent of said coal is 0.32%～0.36% of desulfurated plaster or a citric acid gypsum weight.
Said desulfurated plaster or citric acid gypsum after reacting before getting into drying machine temperature of charge to remain 110 ℃～135 ℃; Dry materials temperature in the said drying step is 135 ℃～145 ℃, and dry back material planar water weight content is less than 0.05%.
Digestion time is more than 48 hours in the said aging step.
After the wastewater treatment that said dehydration reaction produces as the raw water recycle in pulping reaction.There is not discharge of wastewater, three-waste free pollution.
α-high-strength super hard gypsum that the present invention produces can be made various moulds with material or top-grade building decoration and artwork etc., has good fluidity; The intensity advantages of higher, the plaster mould tolerance range is high, and the line variable is little; Processability is good, and smooth surface is so can be used for high-grade gypsum mold.
α-high-strength super hard gypsum that the present invention produces has following application:
1) can be used for the adsorption mould of plastic packing product, replace price high, the metal pattern that difficulty of processing is big.
2) can be used for the stage die that automobile factory uses, the excessive mould that replaces the bigger epoxy resin of the coefficient of expansion to make.
3) can be used for precision castings such as duraluminum, zinc alloy.
4) can be used for precious metal and inlay the jewelry casting die.
5) can be used for sole sample preparation mould in the shoemaking industry.
6) can mix plaster of Paris again and make ceramic die.
7) can mix plaster of Paris again and produce the auto-flowing floor gypsum.
Embodiment
Embodiment 1
After 9 parts of desulfurated plasters, 14 parts of mixing of water, 0.32% the X 2073 that adds desulfurated plaster weight as coal brilliant agent carry out pulping reaction; Slurrying afterreaction temperature is 135 ℃, reaction pressure 3.5Mpa,
Reaction times is 105min;
In the said desulfurated plaster terra alba weight content greater than 92%, the weight content of calcium sulfite is lower than 0.5%;
After reaction dehydration, drying, grinding modification, ageing, homogenizing, make finished product α-gypsum again after the slurrying.
In the said step behind the material reaction before getting into drying machine temperature remain 110 ℃; Dry materials temperature in the said drying step is 135 ℃, and dry back material planar water weight content is less than 0.05%.Digestion time is more than 48 hours in the said aging step.
After the wastewater treatment that said dehydration reaction produces as the raw water recycle in pulping reaction.There is not discharge of wastewater, three-waste free pollution.
Embodiment 2
After 6 parts of citric acid gypsums, 11 parts of mixing of water, add citric acid gypsum weight 0.33% MALEIC ANHYDRIDE and trolamine each 50% carry out pulping reaction for the agent of coal crystalline substance; The pulping reaction temperature is 150 ℃, reaction pressure 4.5Mpa, and the reaction times is 80min;
The terra alba weight content is greater than 95% in the said citric acid gypsum.
After the slurrying again through should instead dewatering, making finished product α-high-strength super hard gypsum after the drying, grinding modification, ageing, homogenizing.
In the said step behind the material reaction before getting into drying machine temperature remain 135 ℃; Dry materials temperature in the said drying step is 145 ℃, and dry back material planar water weight content is less than 0.05%.Digestion time is more than 48 hours in the said aging step.
After the wastewater treatment that said dehydration reaction produces as the raw water recycle in pulping reaction.There is not discharge of wastewater, three-waste free pollution.
Embodiment 3
After 7 parts of desulfurated plasters, 12 parts of mixing of water, add desulfurated plaster weight 0.34% X 2073 and trolamine each 50% carry out pulping reaction for the agent of coal crystalline substance; The pulping reaction temperature is 140 ℃, reaction pressure 4Mpa, and the reaction times is 90min;
In the said desulfurated plaster terra alba weight content greater than 92%, the weight content of calcium sulfite is lower than 0.5%.
After reaction dehydration, drying, grinding modification, ageing, homogenizing, make finished product α-high-strength super hard gypsum again after the slurrying.
In the said step behind the material reaction before getting into drying machine temperature remain 120 ℃; Dry materials temperature in the said drying step is 140 ℃, and dry back material planar water weight content is less than 0.05%.Digestion time is more than 48 hours in the said aging step.
After the wastewater treatment that said dehydration reaction produces as the raw water recycle in pulping reaction.There is not discharge of wastewater, three-waste free pollution.
Embodiment 4
After 8 parts of citric acid gypsums, 13 parts of mixing of water, add citric acid gypsum weight 0.36% X 2073 and MALEIC ANHYDRIDE each 50% carry out pulping reaction for the agent of coal crystalline substance; The pulping reaction temperature is 145 ℃, reaction pressure 4Mpa, and the reaction times is 95min;
The terra alba weight content is greater than 95% in the said citric acid gypsum.
After reaction dehydration, drying, grinding modification, ageing, homogenizing, make finished product α-high-strength super hard gypsum again after the slurrying.
In the said step behind the material reaction before getting into drying machine temperature remain 125 ℃; Dry materials temperature in the said drying step is 140 ℃, and dry back material planar water weight content is less than 0.05%.Digestion time is more than 48 hours in the said aging step.
After the wastewater treatment that said dehydration reaction produces as the raw water recycle in pulping reaction.There is not discharge of wastewater, three-waste free pollution.
Embodiment 5 Test Example
Capability and performance by the prepared α-high-strength super hard gypsum of embodiment 1 to embodiment 4 is following:
Standard consistency 24～34%; Presetting period 6～14min; Final setting time 12～18min; 2h resists folding >=7Mpa; 2h resistance to compression >=25Mpa; Dried folding strength 12～16Mpa; Do ultimate compression strength 55～75Mpa.
α-high-strength the super hard gypsum of embodiment 1 to embodiment 4 preparation has following application:
1) can be used for the adsorption mould of plastic packing product, replace price high, the metal pattern that difficulty of processing is big.
2) can be used for the stage die that automobile factory uses, the excessive mould that replaces the bigger epoxy resin of rate of expansion number to make.
3) can be used for precision castings such as duraluminum, zinc alloy.
4) can be used for precious metal and inlay the jewelry casting die.
5) can be used for sole sample preparation mould in the shoemaking industry.
6) can mix plaster of Paris again and make ceramic die.
7) can mix plaster of Paris again and produce the auto-flowing floor gypsum.
What should explain at last is: obviously, the foregoing description only be for clearly the present invention is described and is done for example, and be not qualification to embodiment.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among protection scope of the present invention.
Claims (1)
1. method of utilizing desulfurated plaster or citric acid gypsum to produce α-gypsum, it is characterized in that: said working method comprises the following steps:
Carry out making finished product α-high-strength super hard gypsum after slurrying, reaction, drying, grinding modification, ageing, the homogenizing after the brilliant agent of desulfurated plaster or citric acid gypsum, water and coal mixed by the regulation proportioning;
The weight part proportioning of raw material is in the said pulping reaction step: desulfurated plaster or citric acid gypsum are 6～9 parts; Water is 11～14 parts; The consumption of the brilliant agent of coal is 0.32%～0.36% of desulfurated plaster or a citric acid gypsum weight; Temperature of reaction is 135 ℃～150 ℃, reaction pressure 3.5～4.5MPa, and the reaction times is 80min～105min;
Terra alba grade content is greater than 92% in the said desulfurated plaster, and the content of calcium sulfite is lower than 0.5%; Terra alba grade content is greater than 95% in the said citric acid gypsum;
The brilliant agent of said coal is one or more mixtures of X 2073, trolamine or MALEIC ANHYDRIDE, and the consumption of the brilliant agent of coal is 0.32%～0.36% of desulfurated plaster or a citric acid gypsum weight;
Said desulfurated plaster or citric acid gypsum after reacting before get into drying machine temperature of charge to remain 110 ℃-135 ℃; Dry materials temperature in the said drying step is 135 ℃-145 ℃, and dry back material planar water weight content is less than 0.05%;
Digestion time is more than 48 hours in the said aging step.
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| CN2010101022211A CN101774773B (en) | 2010-01-28 | 2010-01-28 | Method for producing alpha-gypsum by using desulphurization gypsum or citric acid gypsum |
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| CN2010101022211A CN101774773B (en) | 2010-01-28 | 2010-01-28 | Method for producing alpha-gypsum by using desulphurization gypsum or citric acid gypsum |
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| CN101774773B true CN101774773B (en) | 2012-07-25 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102584052A (en) * | 2012-02-10 | 2012-07-18 | 潍坊英轩实业有限公司 | Method for producing alpha high-strength gypsum by utilizing citric acid waste residues |
| CN104556761A (en) * | 2015-02-02 | 2015-04-29 | 赵云龙 | Alpha-gypsum and production method thereof |
| CN104846440B (en) * | 2015-05-29 | 2017-11-24 | 昆明冶金研究院 | A kind of method that metallurgical gas desulfuration gypsum recrystallization method prepares high-purity Dihydrate gypsum whiskers |
| CN105271856A (en) * | 2015-11-04 | 2016-01-27 | 赵云龙 | Alpha-high strength gypsum production system and application thereof |
| CN114230298B (en) * | 2021-12-08 | 2023-03-28 | 湖南愿景住宅工业科技有限公司 | Ceramic mould gypsum powder made of desulfurized gypsum |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101058488A (en) * | 2007-04-10 | 2007-10-24 | 山东金信新型建材有限公司 | Process for producing alpha gypsum powder by liquid phase method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101058488A (en) * | 2007-04-10 | 2007-10-24 | 山东金信新型建材有限公司 | Process for producing alpha gypsum powder by liquid phase method |
Non-Patent Citations (2)
| Title |
|---|
| 徐锐等.化学石膏综合利用.《化工设计通讯》.2005,第31卷(第4期),54-56. * |
| 王瑞麟等.利用原状二水脱硫(磷)石膏免煅烧生产高强度、高耐水粉刷石膏、石膏砖、石膏砌块、石膏条板技术和产品.《第二届脱硫技术及脱硫石膏、脱硫灰(渣)处理与利用大会论文集》.2008,41-44. * |
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