CN1238290C - Process for preparing mixed plaste for plastering - Google Patents
Process for preparing mixed plaste for plastering Download PDFInfo
- Publication number
- CN1238290C CN1238290C CN 02136118 CN02136118A CN1238290C CN 1238290 C CN1238290 C CN 1238290C CN 02136118 CN02136118 CN 02136118 CN 02136118 A CN02136118 A CN 02136118A CN 1238290 C CN1238290 C CN 1238290C
- Authority
- CN
- China
- Prior art keywords
- gypsum
- mixed
- plastering
- plaste
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
- C04B11/024—Ingredients added before, or during, the calcining process, e.g. calcination modifiers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/002—Mixtures of different CaSO4-modifications, e.g. plaster of Paris and anhydrite, used as cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/05—Calcium sulfate cements obtaining anhydrite, e.g. Keene's cement
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a manufacture method for mixed plastering gypsum. Chemical waste gypsum is used as raw materials; first, an additive water solution is added into raw gypsum materials, is uniformly stirred and is calcined into hemihydrate gypsum (materials A); in addition, the raw gypsum materials are calcined into anhydrous gypsum (materials B); the materials A and the materials B are proportionally mixed and are ground, and required finished products of the mixed plastering gypsum are obtained. The method of the present invention has the advantages of simple process, low additive consumption and no need of retarder addition, so the product cost is greatly reduced, and the product market competitiveness is improved.
Description
Technical field
The invention belongs to building material technical field, be specifically related to a kind of manufacture method of brushing gypsum.
Background technology
The brushing gypsum fast solidifying, cohesive force is strong, and water resistance is good, and certain insulation, heat insulation, sound absorbing capabilities are arranged, and volume stability is good, and quality is moist, and easy construction is the senior plastering material of the superior performance of a kind of interior wall and ceiling.Can be divided into surface layer brushing gypsum, bottom layer brushing gypsum and thermal insulation layer brushing gypsum three classes, each class brushing gypsum is again because the phase composite difference also can be divided into semi-hydrated gypsum type, dehydrated gyp-type and semi-hydrated gypsum-dehydrated gyp-mixed type.Generally be that plaster of paris ore is sintered into semi-hydrated gypsum or dehydrated gyp-earlier, mix the admixture of regulating time of coagulation and water-retentivity then, though the admixture quantity of admixture is few in brushing gypsum, be generally 4～8%, but price is very expensive, account for 40～50% of product cost, cause the application of brushing gypsum to be affected.
The contriver once proposed a kind of manufacture method of brushing gypsum.(application for a patent for invention number 02111055.7) is with chemical waste gypsum, as phosphogypsum, salt gypsum, flue gas desulfurization gypsum, citric acid gypsum and soda gypsum etc. is raw material, under wet condition, admix the retardant of regulating time of coagulation and the admixture that improves water-retentivity in advance, under 100～180 ℃ of temperature, burn till then, promptly make brushing gypsum through grinding again.This method has changed admixture and has mixed method and reduced the admixture incorporation.Still need to add the higher retardant of price.
Summary of the invention
The objective of the invention is to propose does not a kind ofly need to add retardant, thus the brushing gypsum manufacture method that reduces cost, to improve the market competitiveness of brushing gypsum.
According to the term of building material industry standard JC/T 517-93, " brushing gypsum: terra alba or anhydrous calciumsulphate are through calcining, and its resultant mixes admixture separately or after both mixing, also can add the agglutinate that gathers materials and make.So ", the production of brushing gypsum is divided into two operations substantially, promptly is sintered into building gypsum plaster earlier, after mix admixture and mix and stir.Because in use, brushing gypsum need add water and stir into pasty state, the dissolving of admixture and the hydration reaction of gypsum carry out simultaneously, and the admixture gypsum that also has little time to play a role has begun hydration reaction and solidifies gradually, so the effect of admixture can not be given full play to.In order to satisfy the requirement of brushing gypsum technical feature, as the initial set time must be greater than 1 hour, the excess of having to is mixed admixture (retardant).Cause product cost high, and unnecessary admixture also may influence other performances of brushing gypsum, as reduce the intensity of brushing gypsum.
The present invention adopts the powdered chemical waste gypsum, and as phosphogypsum, salt gypsum, flue gas desulfurization gypsum, citric acid gypsum and soda gypsum etc., its composition mainly is dihydrate gypsum and other impurity.These chemical waste gypsum sources are wide, quantity is many, is example with the citric acid gypsum, and in the process of producing citric acid, 1 ton of citric acid of every production will produce the citric acid gypsum about 1 ton half.Original lemon acid waste gypsum is mixed with and is used to the gac that decolours in the production, and present large-scale Citric Acid Plant has changed decoloration process, utilizes ion-exchange resin decolorization, and the waste gypsum of discharging becomes white from black.Because the organic impurity that contains in the citric acid gypsum influences the aquation of gypsum, need repeatedly wash earlier and dehydrate when producing plaster of Paris in addition, production technique trouble and cost are higher.So the treatment process of lemon acid waste gypsum mainly is that offering of lower priced articles uses to small cement plant at present.
It is raw material that the present invention directly adopts chemical waste gypsum.The admixture (being water-holding agent) that plays tackify and water retention is dissolved in earlier in the water, then solution is admixed the raw material gypsum, and stir.The incorporation of admixture only is 1/3～1/10 of an original incorporation, and promptly the consumption of admixture is 0.1～1.0% of a raw material gypsum weight.Again moistening gypsum material powder is burnt till semi-hydrated gypsum in various gypsum calcination equipment, firing temperature is controlled at 100 ℃～180 ℃.In calcination process, in the time of with gypsum dehydration, admixture covers on the gypsum surface equably, can play one's part to the full when water stirs so admixture adds at brushing gypsum.Gypsum through above-mentioned processing is designated as the A material.
In addition a part of raw material gypsum is burnt till the solubility dehydrated gyp-in another gypsum calcination equipment, firing temperature is controlled at 400 ℃～900 ℃.Gypsum through above-mentioned processing is designated as the B material.
A material and B material is mixed by a certain percentage, mill, promptly obtain the finished product brushing gypsum.
Among the present invention, mix admixture in the A material and can adopt CMC (Mierocrystalline cellulose) or modified starch etc. usually.Incorporation is that 0.4～0.6% o'clock of raw material gypsum weight is comparatively desirable.
Among the present invention, the A material is that the moistening firing temperature of gypsum material powder in gypsum calcination equipment is controlled at comparatively ideal of 120 ℃～150 ℃ effects.
Among the present invention, it is comparatively desirable that the firing temperature of B material is controlled at 500 ℃～600 ℃ effects.
Among the present invention, the B material is 10～50% at the brushing gypsum proportion, and is comparatively desirable about 25-35%, and rest part all is the A material.
The manufacture method of the mixed plaste for plastering that the present invention proposes, technology is simple, and the add-on of admixture is few, and does not need to add the higher retardant of price, thereby can reduce product cost greatly.In addition, also further improved the quality of brushing gypsum to a certain extent.
Embodiment
Further describe the present invention below by embodiment.
To be placed in the agitator kettle through the citric acid gypsum 350g of centrifugal or press dewatering.2g CMC is dissolved in the water of 30ml, solution is poured in the agitator kettle is stirred with citric acid gypsum.Then the gypsum slip is placed in the container, and to place temperature be dehydration in 150 ℃ the baking oven, become the A material through the gypsum of above-mentioned processing.
To be placed in the elevated temperature vessel through the citric acid gypsum 150g of centrifugal or press dewatering, and to place temperature be dehydration in 600 ℃ the High Temperature Furnaces Heating Apparatus that the gypsum after burning till is the B material.
Mill after A material and B material mixed together, promptly obtain the mixed plaste for plastering finished product.
Claims (6)
1, a kind of preparation method of mixed plaste for plastering is characterized in that with the chemical waste gypsum being raw material, the water-holding agent of gypsum weight 0.1-1.0% is dissolved in the water, and solution is admixed the raw material gypsum, stirs; Then moistening gypsum powder is burnt till semi-hydrated gypsum in calciner, firing temperature is controlled at 100-180 ℃, remembers that this semi-hydrated gypsum is the A material; Again another part raw material gypsum is burnt till the solubility dehydrated gyp-in calciner, firing temperature is controlled at 400-900 ℃, remembers that this dehydrated gyp-is the B material; Again that A material and B material is mixed, mill, promptly get mixed plaste for plastering, B expects that shared part by weight is the 10-50% of A, B material total amount.
2, mixed plaste for plastering preparation method according to claim 1 is characterized in that chemical waste gypsum is that one of phosphogypsum, salt gypsum, flue gas desulfurization gypsum, citric acid gypsum and soda gypsum are planted or its mixture.
3, mixed plaste for plastering preparation method according to claim 1 is characterized in that the water-holding agent that mixes in the A material adopts Mierocrystalline cellulose or modified starch, and incorporation is the 0.4-0.6% of raw material gypsum.
4, mixed plaste for plastering preparation method according to claim 1 is characterized in that the firing temperature of A material is controlled at 120-150 ℃.
5, mixed plaste for plastering preparation method according to claim 1 is characterized in that the firing temperature of B material is controlled at 500-600 ℃.
6, mixed plaste for plastering preparation method according to claim 1 is characterized in that the shared part by weight of B material is the 25-35% of A, B material total amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02136118 CN1238290C (en) | 2002-07-19 | 2002-07-19 | Process for preparing mixed plaste for plastering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02136118 CN1238290C (en) | 2002-07-19 | 2002-07-19 | Process for preparing mixed plaste for plastering |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1390796A CN1390796A (en) | 2003-01-15 |
| CN1238290C true CN1238290C (en) | 2006-01-25 |
Family
ID=4748506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02136118 Expired - Fee Related CN1238290C (en) | 2002-07-19 | 2002-07-19 | Process for preparing mixed plaste for plastering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1238290C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104072076A (en) * | 2014-06-30 | 2014-10-01 | 孙红芳 | Surface layer grinding gypsum powder |
| CN105985036B (en) * | 2015-02-13 | 2017-11-14 | 郑州三迪建筑科技有限公司 | A kind of processing method of ardealite |
| CN114538811A (en) * | 2021-11-12 | 2022-05-27 | 天宝动物营养科技股份有限公司 | Method for preparing high-strength gypsum from phosphogypsum |
-
2002
- 2002-07-19 CN CN 02136118 patent/CN1238290C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1390796A (en) | 2003-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100457410C (en) | Method for producing paper gypsum board using desulfurated gypsum and ardealite | |
| CN103288410B (en) | Alpha high-strength gypsum based self-leveling material prepared by adopting phosphogypsum and production process thereof | |
| EP2069243B1 (en) | Process for manufacturing ultra low consistency alpha- and beta- blend stucco | |
| CN105314998B (en) | A kind of entringite colloid is thermal insulation mortar of template and preparation method thereof | |
| CN110451912A (en) | A kind of light thermal-insulation water proof type plastering ardealite material | |
| CN104254502A (en) | A method of modifying beta stucco using diethylene-triamine-pentaacetic acid | |
| CN103482898A (en) | Thickening time control agent used for gypsum mortar, and preparation method thereof | |
| CN102557719A (en) | Production method of gypsum board | |
| CN102311254B (en) | Method for preparing stucco gypsum from sintering desulfurization gypsum | |
| CN104671682A (en) | Method for preparing hemihydrate gypsum gel material and gypsum products on line by using phosphogypsum at hot stage | |
| CN106915941A (en) | Half water ardealite mine filling material and preparation method thereof | |
| CN1221489C (en) | Process for preparing plastering gypsum | |
| CN104276801A (en) | Rapid solidification formula of gypsum | |
| CN1238290C (en) | Process for preparing mixed plaste for plastering | |
| CN101653966B (en) | Method for preparing special plastering mortar for self-energy-saving air-entrained concrete wall material | |
| CN102701706A (en) | Resource utilization method for red gypsum produced by means of sulfuric acid process of titanium dioxide factory | |
| CN102390947A (en) | Ardealite mineral admixture and preparation method thereof | |
| JP2001520936A5 (en) | ||
| EP3983359A1 (en) | A method for the manufacture of hydraulic binders from water treatment residuals | |
| CN110550927A (en) | Industrial waste gypsum mortar prepared by industrial tail gas synergy and toxicity solving method | |
| CN103332875A (en) | Industrial by-product gypsum based composite cementitious material and preparation method thereof | |
| CN108314342A (en) | A kind of method that phosphogypsum dihydrate prepares alpha type high-strength gypsum | |
| CN103408278A (en) | Method for preparing anhydrite cementing slurry with ardealite | |
| CN1345701A (en) | Lithium silicon powder used as gypsum reinforcing agent and plastering gypsum containing same | |
| CN101830727A (en) | Gas forming material for aerated concrete and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |