CN1084499A - The production method of high-strength hemihydrate gypsum and equipment thereof - Google Patents
The production method of high-strength hemihydrate gypsum and equipment thereof Download PDFInfo
- Publication number
- CN1084499A CN1084499A CN 92110324 CN92110324A CN1084499A CN 1084499 A CN1084499 A CN 1084499A CN 92110324 CN92110324 CN 92110324 CN 92110324 A CN92110324 A CN 92110324A CN 1084499 A CN1084499 A CN 1084499A
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- ball milling
- promoter
- refining pot
- crystallization
- particulate material
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- 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
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- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00939—Uses not provided for elsewhere in C04B2111/00 for the fabrication of moulds or cores
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The present invention relates to a kind of production method and equipment thereof of high-strength hemihydrate gypsum, its the particulate state plaster stone that will dose micro-crystallization-promoter is packed in the ball milling steaming refining pot, make described pot revolution, and heat it, material is in steam and coefficient while of crystallization-promoter, rotating pot moves with material and grinding element wherein, control saturated vapor pressure, corresponding temperature and hold-time, material or steamed, grind and dry to handle and be converted into alpha-semi water plaster stone, or steamed, frying, grinding and oven dry handle and be converted into composite gypsum.Less investment of the present invention, energy consumption is low, and dust is few, the production efficiency height, steady quality, its composite gypsum of producing have α and β-semi-hydrated gypsum performance simultaneously, are that high performance ceramic die is used and novel material for building.
Description
The present invention relates to produce the method and the equipment thereof of high-strength hemihydrate gypsum with natural dihydrate gypsum or chemical gypsum.
At present, produce the alpha-semi water plaster stone method in common and be the dihydrate gypsum ore is become piece material about 4 centimetres through crusher in crushing, or chemical gypsum powder is shaped to the pellet about 4 centimetres, in 2～4 kilograms per centimeter
2Steam 4～6 hours in the autoclave of pressure, drying was handled 4～6 hours again, wore into powder with pulverizer then, promptly became the high-strength hemihydrate gypsum powder.
This method is owing to steam, dry twice heating, and the production cycle reaches 11 hours, the energy consumption height; Need boiler air feed and high pressure vessel to steam, facility investment is big; Grog after the oven dry is that block the need regrinded into powder through crusher in crushing, and this two procedures dust pollution is big.
In ceramic industry, need a kind of composite gypsum that has under the situation of high water paste ratio than high breaking strength, prior art adopts finished product alpha-semi water plaster stone and β-semi-hydrated gypsum to mix, and its technical feature is difficult to control, the operability difficulty is big, and folding strength only is 3.0MPa.
Application during Chinese patent CN88106348.7(ratio row) a kind of equipment of producing high-strength hemihydrate gypsum is disclosed, this equipment is a kind of motor device, the discharging of energy continuous charging, but this equipment is based on the circulation link chain transfer roller, turn round in the treatment chamber of 500～600 ℃ of temperature, mechanical transmission component is many, the failure rate height, maintenance difficult, the energy consumption height.
The purpose of this invention is to provide a kind of production method and equipment thereof of high-strength hemihydrate gypsum,, reduce cost, boost productivity, reduce dust pollution, improve the mechanical property of gypsum, satisfy ceramic industry and building industry needs so that cut down the consumption of energy.
Production method of the present invention is taked the following step:
Natural dihydrate gypsum or chemical gypsum are ground into the feed particulate material of granularity less than 3mm, get a certain amount of feed particulate material and dose the crystallization-promoter (promptly promoting the crystal growth agent) that is equivalent to its weight 0.05～2 ‰;
The feed particulate material of dosing crystallization-promoter is added in the ball milling steamer, make ball milling steam the revolution of refining pot, with process furnace ball milling being steamed the refining pot heats, steam in the refining pot at described ball milling, produce a large amount of steams by the water in the boiling feed particulate material, in steam and coefficient while of crystallization-promoter, because the rotating belt of ball milling steaming refining pot wherein feed particulate material and grinding element motion, the control ball milling steams Saturated water vapor pressure and corresponding temperature in the refining pot, the constant voltage hold-time, make feed particulate material or steamed, grind and oven dry, or steamed, frying, grind and oven dry, from ball milling steaming refining pot, take out grinding at last and become terra alba.
According to above-mentioned method, controlling the interior Saturated water vapor pressure of described ball milling steaming refining pot is 0.12～0.3MPa, and temperature is 100～180 ℃, and the hold-time is 0.5～2 hour, and described feed particulate material is steamed, grinds and dry to handle is converted into alpha-semi water plaster stone.
According to above-mentioned method, controlling the interior saturation vapor pressure of described ball milling steaming refining pot is 0.02～0.1MPa, temperature is 100～250 ℃, and the hold-time is 0.5～2 hour, and described feed particulate material is steamed, frying, grinding and oven dry are handled and be converted into composite gypsum.
The ball milling of realization the inventive method steams refining equipment and mainly is made up of process furnace, heat insulation wall, ball milling steaming refining pot, deceleration and supporting device etc.The process furnace top is provided with an annular heat insulation wall, cylindrical ball milling steams refining pot level and is installed in the heat insulation wall, ball milling steams between refining pot and the heat insulation wall and leaves heating chamber, so that the cylinder that warm air can make ball milling steam the refining pot all is heated, ball milling steams the opening for feed that an end that refines pot is provided with closure, the other end is provided with sealable discharge port, tensimeter, thermometer and purging valve etc., whole cooker is by support and plurality of rollers supporting, central shaft and deceleration mechanism by the one end connect, and deceleration mechanism comprises speed reduction unit and electric motor.
Below further describe embodiments of the invention.
The crystallization-promoter of being dosed in the feed particulate material of the present invention is the imperial board crystallization-promoter in sky that Harbin applied chemistry institute produces.The amount of filling of crystallization-promoter is 0.05 of feed particulate material～2 ‰, and crystallization-promoter can directly be dosed in the feed particulate material in proportion, also crystallization-promoter can be dissolved in the less water, and then dose in the feed particulate material.
Embodiment 1:
The feed particulate material of the dosing crystallization-promoter ball milling of packing into is steamed in the refining pot, the grinding element of packing into simultaneously, these grinding elemenies can be steel balls, or porcelain ball, or cobble, preferably there is not the water anhydrite piece, or alpha-semi water plaster stone piece, its lumpiness is 4～20cm, opening motor makes ball milling steaming refining pot turn round with 2～10 rev/mins speed, heat to it by process furnace simultaneously, when raw material is heated to 80 ℃, the water that adheres in the raw material is heated and becomes steam and emit from purging valve, take a pot interior original air simultaneously out of, to keep raw material to be in the saturated steam atmosphere, close purging valve then, continue to be heated to about 120 ℃, make the attached water of raw material continue vaporization, dihydrate gypsum begins dehydration simultaneously, make a pot interior Saturated water vapor pressure reach 0.15MPa, this pressure is kept stopping after constant 30 minutes heating, open purging valve, about reheat to 140 ℃, rapidly the attached water steam has been put, stopped revolution, material in the ball milling refining pot is through steaming, grind, oven dry is handled and to be converted into alpha-semi water plaster stone, take out grinding the alpha-semi water plaster stone powder.
Embodiment 2:
When producing the composite gypsum powder, purging valve can be turned down, regulate ball milling and steam the refining kettle temperature between 100～120 ℃, Saturated water vapor pressure is 0.05MPa, keeps 30 minutes, open purging valve, continue heating and make temperature rise to 180 ℃, after about 40 minutes, stop revolution, material is promptly steamed, frying, grinding and oven dry are handled and be converted into composite gypsum, take out grinding the composite gypsum powder.The composite gypsum that this method is produced, the physical strength and the water resisting property that had both had alpha-semi water plaster stone, the dual performance that has the high water paste ratio and the good water absorption of β-semi-hydrated gypsum again is a kind of high performance composite gypsum powder, is particularly suitable for making ceramic plaster mould.
The present invention has following advantage compared with the prior art:
1, properties of product are stable, and technical parameter is controlled easily.
The present invention has dosed crystallization-promoter when making alpha-semi water plaster stone or composite gypsum powder, so that manufacturing condition reduces, time shorten, low for equipment requirements, process variables is few, the easy to operate technology of workman is grasped easily, so that product homogenization degree height, stable performance. The composition of crystallization-promoter can be adjusted according to the different mineral resources of quality, in order to reach control setting time of product and water paste ratio in certain scope, or is adjusted according to user's requirement.
The inventive method makes makes that to steam with drying two procedures in the alpha-semi water plaster stone method be a suitable steaming operation. No longer produce in the product because between two procedures, temperature of charge descends and the regeneration dihydrate gypsum of appearance, or because the anhydrous gypsum of the inequality of the long appearance of drying time. It is a procedure that the present invention steams baking, and the technological parameter variable makes the product ingredient stability less, and the technical performance of product is easy to guarantee.
2, can disposablely produce the mixture of α and β type gypsum, be called in the present invention composite gypsum. The performance of this composite gypsum is with alpha-semi water plaster stone and β-semi-hydrated gypsum (3: 7) land plaster performance comparative superiority of mixing many by a certain percentage. Utilize the composite gypsum of the blue or green cream making of Taiyuan City's Western Hills secondary when water/cream is 65%, 2 hours anti-foldings Intensity is up to 3.5MPa, and above-mentioned mixed gypsum powder only has 3.0MPa.
3, equipment investment is few.
The present invention produces alpha-semi water plaster stone or the composite gypsum equipment investment is little, do not need for gas boiler and autoclave, and with ball milling steaming pot, working pressure is no more than 0.3MPa, is low pressure vessel, and price is low, take daily output 20T as example, invests and has reduced half.
4, save the energy, productivity height.
The inventive method is produced alpha-semi water plaster stone or composite gypsum, and the cylindrical surface that only needs a thermal treatment, warm air to make rotating ball milling steam the refining pot all is heated, the thermo-efficiency height, production cycle only needs 2 hours, and current technology is to steam, dry by the fire twice heat treated, and the time reaches 11 hours.
When the inventive method is produced alpha-semi water plaster stone or composite gypsum grinding gypsum, be in the heating kettle of sealing, to carry out, because the heat that the grinding element collision is produced is utilized to add thermal material.This part is very considerable by the heat that mechanical energy changes heat energy into, and it can bring up to 60～80 ℃ to material from normal temperature in 2 hours.
The inventive method is produced the moisture content of the required saturated steam of alpha-semi water plaster stone or composite gypsum, is the crystal water in the raw material, per tonly is about 150 kilograms, only need add 50 kg of water, and this significantly reduces than boiler air feed institute water requirement, reduces water consumption 2/3.
5, dust is little.
The inventive method produces alpha-semi water plaster stone or the processing of composite gypsum raw material is to use semidrying, the dust of this method itself is just little than dry method, adding powder-grinding process mainly is to carry out in the ball milling steaming refining pot of sealing, so dust is very little in the whole process of production, has reduced dust pollution.
Claims (8)
1, a kind of production method of high-strength hemihydrate gypsum is characterized in that taking the following step:
A, natural dihydrate gypsum or chemical gypsum are ground into the feed particulate material of granularity less than 3mm, get a certain amount of feed particulate material and dose the crystallization-promoter that is equivalent to its weight 0.05～2 ‰;
B, the feed particulate material of dosing crystallization-promoter is added in the ball milling steamer, make ball milling steam the revolution of refining pot, with process furnace ball milling being steamed the refining pot heats, steam in the refining pot at described ball milling, produce a large amount of steams by the water in the boiling granulated raw material, in steam and coefficient while of crystallization-promoter, because the rotating belt of ball milling steaming refining pot wherein feed particulate material and grinding element motion, Saturated water vapor pressure and corresponding temperature in the control ball milling refining pot, the constant voltage hold-time, make feed particulate material or steamed, grind and oven dry, or steamed, frying, grind and oven dry, from ball milling steaming refining pot, take out grinding at last and become terra alba.
2, method according to claim 1, it is characterized in that: controlling the interior Saturated water vapor pressure of described ball milling steaming refining pot is 0.12～0.3MPa, temperature is 100～180 ℃, hold-time is 0.5～2 hour, and described feed particulate material is steamed, grinds and dry to handle is converted into alpha-semi water plaster stone.
3, method according to claim 1, it is characterized in that: controlling the interior Saturated water vapor pressure of described ball milling steaming refining pot is 0.02～0.1MPa, temperature is 100～250 ℃, hold-time is 0.5～2 hour, and described feed particulate material is steamed, frying, grinding and oven dry are handled and be converted into composite gypsum.
4, method according to claim 1 is characterized in that: described crystallization-promoter is the imperial board crystallization-promoter in sky that Harbin applied chemistry institute produces.
5, method according to claim 1 is characterized in that: crystallization-promoter can directly be dosed in the feed particulate material in proportion, or crystallization-promoter is dissolved in a spot of water, and then doses in the feed particulate material.
6, method according to claim 1 is characterized in that: it is 2～10 rev/mins that described ball milling steams refining pot velocity of rotation.
7, method according to claim 1 is characterized in that: it is no water anhydrite piece that described ball milling steams the interior used grinding element of refining pot, or the alpha-semi water plaster stone piece.
8, the ball milling of realizing the described method of any one claim of claim 1 to 3 steams refining equipment, it mainly steams refining pot, deceleration and supporting device etc. by process furnace, heat insulation wall, ball milling and forms, it is characterized in that: the process furnace top is provided with an annular heat insulation wall, columniform ball milling steams refining pot level and is installed in the heat insulation wall, leave heating chamber between the two, so that the cylinder that warm air can make ball milling steam the refining pot all is heated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92110324 CN1084499A (en) | 1992-09-19 | 1992-09-19 | The production method of high-strength hemihydrate gypsum and equipment thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92110324 CN1084499A (en) | 1992-09-19 | 1992-09-19 | The production method of high-strength hemihydrate gypsum and equipment thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1084499A true CN1084499A (en) | 1994-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92110324 Pending CN1084499A (en) | 1992-09-19 | 1992-09-19 | The production method of high-strength hemihydrate gypsum and equipment thereof |
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| Country | Link |
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| CN (1) | CN1084499A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328198C (en) * | 2006-02-23 | 2007-07-25 | 张继忠 | Closed dry process of producing semi-hydrated gypsum |
| CN100345788C (en) * | 2006-01-10 | 2007-10-31 | 南京一夫建材实业有限公司 | Alpha type high-strength gypsum and its preparation method |
| CN100347118C (en) * | 2003-07-29 | 2007-11-07 | 同济大学 | Alpha-type hemihydrated gypsum producing process and apparatus thereof |
| CN102092974A (en) * | 2010-12-08 | 2011-06-15 | 太原理工大学 | Method and device for producing calcined gypsum slurry by hot press method |
| CN102409164A (en) * | 2011-12-02 | 2012-04-11 | 中国科学院过程工程研究所 | Anti-caking roasting method of mixed rare earth ore |
| CN115951646A (en) * | 2023-03-14 | 2023-04-11 | 一夫科技股份有限公司 | Intelligent production control method and system for alpha-type semi-hydrated gypsum |
-
1992
- 1992-09-19 CN CN 92110324 patent/CN1084499A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100347118C (en) * | 2003-07-29 | 2007-11-07 | 同济大学 | Alpha-type hemihydrated gypsum producing process and apparatus thereof |
| CN100345788C (en) * | 2006-01-10 | 2007-10-31 | 南京一夫建材实业有限公司 | Alpha type high-strength gypsum and its preparation method |
| CN1328198C (en) * | 2006-02-23 | 2007-07-25 | 张继忠 | Closed dry process of producing semi-hydrated gypsum |
| CN102092974A (en) * | 2010-12-08 | 2011-06-15 | 太原理工大学 | Method and device for producing calcined gypsum slurry by hot press method |
| CN102409164A (en) * | 2011-12-02 | 2012-04-11 | 中国科学院过程工程研究所 | Anti-caking roasting method of mixed rare earth ore |
| CN115951646A (en) * | 2023-03-14 | 2023-04-11 | 一夫科技股份有限公司 | Intelligent production control method and system for alpha-type semi-hydrated gypsum |
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