CN103664017A - Preparation method of desulphurization gypsum beta powder - Google Patents
Preparation method of desulphurization gypsum beta powder Download PDFInfo
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- CN103664017A CN103664017A CN201210362312.8A CN201210362312A CN103664017A CN 103664017 A CN103664017 A CN 103664017A CN 201210362312 A CN201210362312 A CN 201210362312A CN 103664017 A CN103664017 A CN 103664017A
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Abstract
The invention relates to a preparation method of desulphurization gypsum beta powder. The method comprises the following steps: (1) preparing basic materials: selecting and warehousing desulphurization gypsum; (2) calcining, scattering, drying and rolling to remove the crystallization water through a one-step secondary temperature increasing method by adopting an airflow rotational-flow dynamic flash roasting furnace to form semi-water desulphurization gypsum powder, and homogenizing, aging and packaging the desulphurization gypsum powder to obtain the desulphurization gypsum beta powder. The method is easy, convenient to operate and applicable to the mass production. The preparation method is used for comprehensively processing and utilizing the industrial waste residue-smoke desulphurization gypsum of a power plant and utilizing the desulphurization gypsum to substitute the natural dihydrate gypsum to become a gypsum building material and a material for ceramic mold, so that the problems that the dehydrate gypsum resource is in shortage and the smoke desulphurization gypsum comprehensive treatment of the power plant is lagging can be solved, the waste can be converted into treasures, and the cycling economic development can be promoted.
Description
Technical field
The present invention relates to building decoration, ceramic model material, be specifically related to a kind of preparation method of desulfurization gypsum beta-powder.
Background technology
On market, existing gypsum beta-powder be take natural dihydrate gypsum and is fired and form as raw material, is mainly used in building decoration and the ceramic models such as plasterboard, plaster line, gypsum block.Although China Shi Yige gypsum big country, high-quality dihydrate gypsum resource is few, only accounts for 10% left and right, and other are mainly common dihydrate gypsum and anhydrite.China is since reform and opening-up, and particularly in recent ten years, due to the fast development of building field, gypsum output rapidly increases, and causes high-quality natural dihydrate gypsum scarcity of resources, is badly in need of high-quality raw material and substitutes.
On the other hand, for conscientiously implementing energy-saving and emission-reduction policy, coal fired power plant flue gas desulfurization gypsum plant construction is developed rapidly.Desulfurized gesso of flue gas is in based Wet Process Flue Gas, the industry by-product gypsum by flue gas desulfurization (FGD) unit through the separation of lime (stone) WATER-WASHING METHOD.This industry by-product gypsum is Powdered, wherein terra alba can content can be up to 95%, suitable with high-quality natural dihydrate gypsum.Up to now, the annual production of national desulfurized gesso of flue gas has reached 1,200 ten thousand tons.Desulfurized gesso of flue gas is a kind of extraordinary building resource, is the starting material with plaster of paris equivalence.Particularly European abroad, nearly all desulfurated plaster is all widely used in building material industry and produces building materials of gypsum product and be used as cement setting retarder.Domestic the comprehensive treating process of desulfurated plaster and application have been started to starting, but development is slower, not yet forms at present industrialization, mass-producing and specialized production.
Summary of the invention
The object of the invention is to be to provide a kind of preparation method of desulfurization gypsum beta-powder, easy to implement the method, easy to operate, be produced on a large scale.Be intended to power plant's industrial residue-desulfurized gesso of flue gas to carry out comprehensive treating process and utilization, make its alternative natural dihydrate gypsum, become another kind of gypsum building material and ceramic die material, to solve high-quality natural dihydrate gypsum scarcity of resources, the problem that the comprehensive treating process of means of flue gas desulfurization of power plant gypsum lags behind, turn waste into wealth, promoted recycling economy development.
The object of the present invention is achieved like this: a kind of preparation method of desulfurization gypsum beta-powder, is characterized in that comprising following sequential steps: 1. base-material is prepared: desulfurated plaster is passed through to screening-warehouse-in; 2. adopt air-flowing type eddy flow dynamically to dodge burning stove, by a step secondary additional warm therapy, calcine-break up-dry-mill and slough crystal water, become half water desulfurization gypsum powder, homogenizing, ageing, packing makes desulfurization gypsum beta-powder.
Its concrete preparation process of a kind of desulfurization gypsum beta-powder is: 1. base-material is prepared: power plant desulfurization gypsum is put in storage by screening, and fineness, at 40-60 μ m, by heap, airing on heap canopy, is sloughed part attached water (attached water≤10%).2. by drying the desulfurated plaster of sloughing attached water≤10%, at the uniform velocity enter air-flowing type eddy flow and dynamically dodge burning stove, while feeding intake, enter furnace temperature (400-500 ℃)-calcining (1～6 second)-discharging (160～220 ℃ of material temperatures)-homogenizing, ageing (8～15 hours)-packing makes desulfurization gypsum beta-powder.
Desulfurization gypsum beta-powder, comprise following technical indicator: when product is used as building gypsum plaster, initial set 4 '-6 ', final set 12 '-17 ', 2h folding strength 3.0MPa-3.1MPa, can meet the requirement of < < plaster of Paris > > GB9776-88.When product is used as mould gypsum powder, initial set 10 '-11 ', final set 22 '-24 ', 2h folding strength ' 3.2MPa-3.3MPa, can meet the requirement of < < model plaster > > QBl639-92.
The present invention explores and opens one and adopt power plant's industrial residue one desulfurized gesso of flue gas to manufacture the uncharted field of β terra alba for building and Tao Mo.Product of the present invention and natural dihydrate gypsum β powder have equal quality, and its goods have the features such as fire prevention, protection against the tide, antimould and antiborer, sound-insulating and heat-insulating, the smooth exquisiteness of bathroom product, belong to real green material, can not bring any harm to environment and human body.The fineness of desulfurated plaster is comparatively even, and particle mainly concentrates on 40-60 μ m, and therefore, preparing desulfurization gypsum beta-powder only needs to dry, and does not need fragmentation and fine grinding, can save electric energy, reduces noise.Product utilization of the present invention power plant industrial residue, turns waste into wealth.Thereby product of the present invention meets megatrend, meet environmental protection theory, meet recycling economy direction.
Embodiment
Plastering has characteristic cool in summer and warm in winter, has certain sound insulation function.People lives in the interior space with gypsum building or decoration, can feel refrigerant comfortable, relaxed and joyful.And gypsum has certain sound insulation moisture absorption effect, adjustable indoor air temperature, subdues alien tones, for human living provides a quiet healthy space.But because the plaster of paris belongs to the resource forming for 1 years, and non-renewable, and its owning amount does not adapt to the demand that people increase day by day far away.It is base mateiral that the present invention adopts power plant's industrial residue-desulfurated plaster, by production technique the activity excitation of desulfurated plaster out, making it becomes the β terra alba with the plaster of paris with same function, is widely used in the fields such as building and ornament materials, ceramic sanitary ware mould.
Preparation method:
1. base-material is prepared: by power plant desulfurization gypsum screening warehouse-in, fineness, at 40-60 μ m, by piling, dry on heap canopy, is sloughed part attached water (attached water≤10%).
2. by drying the desulfurated plaster of sloughing part attached water≤10%, at the uniform velocity enter air-flowing type eddy flow and dynamically dodge burning stove, while feeding intake, enter furnace temperature (400-500 ℃) calcining (1～6 second) discharging (160～220 ℃ of material temperatures) homogenizing, ageing (8～15 hours) packing makes desulfurization gypsum beta-powder.
EXAMPLE l
Desulfurated plaster screening warehouse-in, fineness is at 60 μ m, and attached water 10%, enters 400 ℃ of furnace temperatures while feeding intake, calcines 3 seconds, 160 ℃ of discharging material temperatures, homogenizing, ageing 8 hours, packing makes desulfurization gypsum beta-powder.Initial set 4 ', final set 12 ', 2h folding strength 3.0MPa, can meet the requirement of < < plaster of Paris > > GB9776-88.
Embodiment 2
Desulfurated plaster screening warehouse-in, fineness is at 55 μ m, and attached water 9%, enters 430 ℃ of furnace temperatures while feeding intake, calcines 2 seconds, 180 ℃ of discharging material temperatures, homogenizing, ageing 10 hours, packing makes desulfurization gypsum beta-powder.Initial set 5 ', final set 15 ', 2h folding strength 3.0MPa, can meet the requirement of < < plaster of Paris > > GB9776-88.
Claims (1)
1. a preparation method for desulfurization gypsum beta-powder, is characterized in that comprising following sequential steps: 1. base-material is prepared: desulfurated plaster is passed through to screening-warehouse-in; 2. adopt air-flowing type eddy flow dynamically to dodge burning stove, by a step secondary additional warm therapy, calcine-break up-dry-mill and slough crystal water, become half water desulfurization gypsum powder, homogenizing, ageing, packing makes desulfurization gypsum beta-powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210362312.8A CN103664017A (en) | 2012-09-26 | 2012-09-26 | Preparation method of desulphurization gypsum beta powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210362312.8A CN103664017A (en) | 2012-09-26 | 2012-09-26 | Preparation method of desulphurization gypsum beta powder |
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| CN103664017A true CN103664017A (en) | 2014-03-26 |
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| CN201210362312.8A Pending CN103664017A (en) | 2012-09-26 | 2012-09-26 | Preparation method of desulphurization gypsum beta powder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105503115A (en) * | 2016-01-06 | 2016-04-20 | 贵州腾峰科技有限责任公司 | Sulfurgypsum for ceramic mold and preparation method of sulfurgypsum |
-
2012
- 2012-09-26 CN CN201210362312.8A patent/CN103664017A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105503115A (en) * | 2016-01-06 | 2016-04-20 | 贵州腾峰科技有限责任公司 | Sulfurgypsum for ceramic mold and preparation method of sulfurgypsum |
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Application publication date: 20140326 |