CN106587879B - A kind of method that slag stir-fry gypsum prepares gypsum dry mixed mortar - Google Patents
A kind of method that slag stir-fry gypsum prepares gypsum dry mixed mortar Download PDFInfo
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- CN106587879B CN106587879B CN201611137407.4A CN201611137407A CN106587879B CN 106587879 B CN106587879 B CN 106587879B CN 201611137407 A CN201611137407 A CN 201611137407A CN 106587879 B CN106587879 B CN 106587879B
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- gypsum
- slag
- dry mixed
- mixed mortar
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/142—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/144—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being a flue gas desulfurization product
-
- 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
- C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained
- C04B11/036—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained for the dry process, e.g. dehydrating in a fluidised bed or in a rotary kiln, i.e. to obtain beta-hemihydrate
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention provides a kind of slags to fry the method that gypsum prepares gypsum dry mixed mortar, frying desulfurized gypsum is directly mixed in frying slag machine using the hot stove slag of Gangue Power Plant discharge, again by mixture after ball mill refines shaping, it is sieved into land plaster and slag sand, auxiliary agent is added through ingredient and is mixed and made into gypsum dry powder and mortar.This method of the invention utilizes hot afterheat of slags frying desulfurized gypsum, eliminate the process of individually calcining desulfurized gypsum, save the energy and calciner investment, simple production process, preparation cost is low, the new way that a high-efficiency resource recycling is opened for plant slag and desulfurized gypsum has reached environmental protection, the double effects that benefit is given up.
Description
Technical field
The invention belongs to industrial solid castoff resource recycling technical fields, and in particular to a kind of slag stir-fry gypsum system
The method of standby gypsum dry mixed mortar.
Background technique
China's recirculating fluidized bed coal gangue power generation technology has reached international most advanced level, the low calorific value coals such as gangue power generation dress
Machine is added of about 30,000,000 kW and is building unit total installed capacity scale about 35,000,000 kW, gangue year utilization up to more than 200,000,000 tons,
Tremendous contribution is made for national energy conservation and emission reduction.And at the same time, Gangue Power Plant can discharge a large amount of desulfurized gypsum and clinker, it is difficult to
It utilizes, causes the Gangue Power Plant energy and the wasting of resources.
Gangue Power Plant desulfurized gypsum can be used for plastering and building gypsum through frying processing, but desulfurized gypsum frying need through
The processes such as drying, dehydration, energy consumption height, thermal transition low efficiency, about 80 yuan of the frying cost of ton land plaster.
The clinker of Gangue Power Plant discharge, about 700 DEG C of tapping temperature, clinker partial size is less than 8mm, discharges the basic physics of clinker
Performance indicator is all satisfied light-weight aggregate requirement, can be made into light-weight aggregate sand after refining shaping.
Gypsum dry mixed mortar has superior caking property, fireproof performance and good respiratory, is a kind of novel
Green, health, environmental protection wall plastering construction material.And it is main former that existing gypsum dry mixed mortar, which is with land plaster and sand,
The auxiliary agent of material, addition 1~2% is formulated, and sand cream is than being about 2.5:1, and wherein sand is medium-fine sand, is generallyd use at present natural
Sand, needs drying and processing before use, existing this gypsum dry mixed mortar preparation cost is high.
Summary of the invention
Gypsum, which is fried, the object of the present invention is to provide the low slag of a kind of simple process, production cost prepares gypsum dry mixed mortar
Method solves the problems, such as that existing Gangue Power Plant encounters the above-mentioned energy, the wasting of resources.
The technical solution of the present invention is to provide a kind of slags to fry the method that gypsum prepares gypsum dry mixed mortar, including walks as follows
It is rapid:
1) the hot stove slag of circulating fluidized bed boiler discharge is sent into slag stir-fry machine with desulfurized gypsum to mix, changes desulfurized gypsum
For semi-hydrated gypsum.
2) mixture being discharged from slag stir-fry machine is refined into shaping through ball mill.
3) mixture being discharged from ball mill is sieved into land plaster, slag sand and waste.
4) land plaster obtained with step 3) and slag sand make primary raw material, and auxiliary agent is added, through ingredient be uniformly mixed to get
To gypsum dry mixed mortar.
Further, above-mentioned steps 1) in hot stove slag mixed with desulfurized gypsum before hot stove slag temperature not less than 500 DEG C.
Further, above-mentioned steps 1) in the mass ratio that is mixed with desulfurized gypsum of hot stove slag be 1:1~1:2.
Further, above-mentioned steps 2) mixture temperature that is discharged in slag stir-fry machine is not less than 130 DEG C.
Further, above-mentioned steps 3) in the partial size of land plaster be less than 0.075mm, the partial size of slag sand is 0.075~
The partial size of 4.75mm, waste are greater than 4.75mm.
Further, above-mentioned steps 4) in the mass ratio of land plaster and slag sand be 1:1~1:2.5.
Further, above-mentioned steps 4) in auxiliary agent include following component based on land plaster mass percent: citric acid 0.4
~0.7%；Cellulose ether 0.15~0.5%；Rubber powder 0.5~2%, water-reducing agent 0.8~1.2%.
Further, above-mentioned slag fries machine and uses rotary dryer.
Further, above-mentioned ball mill is using single storehouse brief note ball mill, the Ceramic Balls of built-in φ 30mm.
Beneficial effects of the present invention:
(1) method that this slag stir-fry gypsum provided by the invention prepares gypsum dry mixed mortar makes full use of Gangue Power Plant to generate electricity
Hot stove slag (about 500 DEG C~700 DEG C) afterwards, frying desulfurized gypsum, compared to the calcination method of traditional frying desulfurized gypsum, work of the present invention
Skill is simple, and the mating circulating fluidized bed boiler of energy is directly produced, and reduces equipment investment；And it is few with even without being additionally provided
Heat source saves a large amount of energy investment；Its heat transfer efficiency is high, and desulfurized gypsum frying reduces about 80 yuan/ton at instinct.
(2) method that this slag provided by the invention fries that gypsum prepares gypsum dry mixed mortar replaces existing river using clinker
Sand is applied in gypsum dry mixed mortar, not only takes full advantage of solid waste, is reduced slag treatment and is disposed expense, and reduces
About 80 yuan/ton of river sand preparation cost.
(3) method that this slag provided by the invention fries that gypsum prepares gypsum dry mixed mortar makes full use of gypsum and clinker
Feature, the gypsum clinker dry-mixed mortar of development is not only able to satisfy basic performance requirement, and because the characteristic of clinker also has
The excellent performances such as light, heat preservation.
(4) it is power generation cooperative disposal desulfurization stone that this slag provided by the invention, which fries the method that gypsum prepares gypsum dry mixed mortar,
Cream and clinker, the important achievement of coproduction brushing gypsum mortar, simple production process, preparation cost is low, for plant slag and takes off
Sulphur gypsum opens the new way of a high-efficiency resource recycling.
The present invention is described in further details below with reference to attached drawing.
Detailed description of the invention
Fig. 1 is the process flow chart that slag of the present invention fries that gypsum prepares the method for gypsum dry mixed mortar.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1:
As shown in Figure 1, present embodiments providing a kind of method that slag stir-fry gypsum prepares gypsum dry mixed mortar, including walk as follows
It is rapid:
1) the hot stove slag of circulating fluidized bed boiler discharge is sent into slag stir-fry machine with desulfurized gypsum to mix, the slag is fried machine and used
Rotary dryer, hot stove slag mix under the rotation heat tracing stirring of rotary dryer with desulfurized gypsum, meanwhile, the heat of hot stove slag
Desulfurized gypsum is passed to, so that the Free water of desulfurized gypsum and the crystallization water, which are detached from, becomes vapor, vapor is together with hot-air
Discharge, desulfurized gypsum are converted into semi-hydrated gypsum, utilize the heat of hot stove slag that can lack with even without being additionally provided heat source in this way
Drying and dewatering is carried out to desulfurized gypsum, saves a large amount of energy investment.Wherein, in order to enable desulfurized gypsum can be converted more fully
For semi-hydrated gypsum, for the temperature of hot stove slag not less than 500 DEG C, such hot stove slag is desulfurization before the hot stove slag is mixed with desulfurized gypsum
The heat that gypsum provides is more abundant；And the mass ratio of hot stove slag and desulfurized gypsum then needs depending on the temperature of hot stove slag,
General control is in 1:1~1:2.
2) mixture being discharged from slag stir-fry machine is refined into shaping through ball mill.The temperature for the mixture being wherein discharged is not low
In 130 DEG C, to ensure that desulfurized gypsum has been converted into beta-type semi-hydrated gypsum；Ball mill is using single storehouse brief note ball mill, built-in φ 30mm
Ceramic Balls, keep land plaster levigate, slag sand refinement, shaping.
3) mixture being discharged from ball mill is separated into land plaster, slag sand and waste by grader, respectively
Land plaster after separation and slag sand are subjected to ageing and Shape correction.The partial size of land plaster is less than 0.075mm, the partial size of slag sand
Partial size for 0.075~4.75mm, waste is greater than 4.75mm.
4) land plaster that takes step 3) to obtain and slag sand make primary raw material, and auxiliary agent is added, through ingredient be uniformly mixed to get
To gypsum dry mixed mortar.
Specifically, the mass ratio of land plaster and slag sand is 1:1~1:2.5, auxiliary agent includes pressing land plaster mass percent
The following component of meter: citric acid 0.4~0.7%；Cellulose ether 0.15~0.5%；Rubber powder 0.5~2%, water-reducing agent 0.8~
1.2%.
This slag provided by the invention fries the method that gypsum prepares gypsum dry mixed mortar and utilizes hot afterheat of slags frying desulfurization
Gypsum eliminates the process of individually calcining desulfurized gypsum, saves the energy and calciner investment, simple production process, preparation
It is at low cost, the new way of a high-efficiency resource recycling is opened with desulfurized gypsum for plant slag, has reached environmental protection, benefit is given up
Double effects.
Embodiment 2:
On the basis of the preparation method that embodiment 1 provides, the present embodiment hot stove slag tapping temperature is 700 DEG C, hot stove slag
It is 1:1.3 with desulfurized gypsum, fries machine frying by slag, and desulphurization building gypsum (i.e. land plaster) base through grinding, screening preparation
This physical property is as shown in table 1.
The desulphurization building gypsum obtained with frying, using slag sand as fine aggregate, sand cream ratio is 2.5:1, and it is dry-mixed to prepare gypsum
Mortar, control water paste ratio are 0.51:1, and citric acid, cellulose ether, rubber powder volume are respectively 0.4%, 0.15%, 0.5%, poly- carboxylic
Sour water-reducing agent volume is 1.1%, and gypsum dry mixed mortar performance obtained is as shown in table 2.
Table 1: desulphurization building gypsum physical property table
Table 2: gypsum dry mixed mortar Fundamental Physical Properties index
Embodiment 3:
On the basis of the preparation method that embodiment 1 provides, the present embodiment hot stove slag tapping temperature is 600 DEG C, hot stove slag
It is 1:1 with desulfurized gypsum, fries machine frying by slag, and the Fundamental Physical Properties through grinding, the desulphurization building gypsum of screening preparation
As shown in table 3.
The desulphurization building gypsum obtained with frying, using slag sand as fine aggregate, sand cream ratio is 2:1, prepares the dry-mixed sand of gypsum
Slurry, control water paste ratio are 0.49:1, and citric acid, cellulose ether, rubber powder volume are respectively 0.7%, 0.5%, 1.0%, polycarboxylic acids
Water-reducing agent volume is 0.8%, and gypsum dry mixed mortar performance obtained is as shown in table 4.
Table 3: desulphurization building gypsum physical property table
Table 4: gypsum dry mixed mortar Fundamental Physical Properties index
Embodiment 4:
On the basis of the preparation method that embodiment 1 provides, the present embodiment hot stove slag tapping temperature is 750 DEG C, hot stove slag
It is 1:2 with desulfurized gypsum, fries machine frying by slag, and the Fundamental Physical Properties through grinding, the desulphurization building gypsum of screening preparation
As shown in table 5.
The desulphurization building gypsum obtained with frying, using slag sand as fine aggregate, sand cream ratio is 1:1, prepares the dry-mixed sand of gypsum
Slurry, control water paste ratio are 0.5:1, and citric acid, cellulose ether, rubber powder volume are respectively 0.5%, 0.3%, 2.0%, and polycarboxylic acids subtracts
Aqua volume is 1.2%, and gypsum dry mixed mortar performance obtained is as shown in table 6.
Table 5: desulphurization building gypsum physical property table
Table 6: gypsum dry mixed mortar Fundamental Physical Properties index
Desulphurization building gypsum obtained is able to satisfy second level building gypsum and refers in the present invention it can be seen from embodiment 2~4
Mark, and superior performance；Meanwhile the gypsum dry mixed mortar of preparation has very superior Fundamental Physical Properties and good water-retaining property
Energy.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.
Claims (8)
1. a kind of slag fries the method that gypsum prepares gypsum dry mixed mortar, characterized by the following steps:
1) the hot stove slag of circulating fluidized bed boiler discharge is sent into slag stir-fry machine with desulfurized gypsum to mix, desulfurized gypsum is made to be changed into half
Water gypsum, the temperature of hot stove slag is not less than 500 DEG C before the hot stove slag is mixed with desulfurized gypsum；
2) mixture being discharged from slag stir-fry machine is refined into shaping through ball mill；
3) mixture being discharged from ball mill is sieved into land plaster, slag sand and waste；
4) land plaster and slag sand for taking step 3) to obtain make raw material, and auxiliary agent is added, and are uniformly mixed through ingredient to get dry to gypsum
Mortar.
2. slag as described in claim 1 fries the method that gypsum prepares gypsum dry mixed mortar, it is characterised in that: in the step 1)
The mass ratio of hot stove slag and desulfurized gypsum is 1:1~1:2.
3. slag as described in claim 1 fries the method that gypsum prepares gypsum dry mixed mortar, it is characterised in that: the step 2) slag
The mixture temperature being discharged in stir-fry machine is not less than 130 DEG C.
4. slag as described in claim 1 fries the method that gypsum prepares gypsum dry mixed mortar, it is characterised in that: in the step 3)
The partial size of land plaster is less than 0.075mm, and the partial size of slag sand is 0.075~4.75mm, and the partial size of waste is greater than 4.75mm.
5. slag as described in claim 1 fries the method that gypsum prepares gypsum dry mixed mortar, it is characterised in that: in the step 4)
The mass ratio of land plaster and slag sand is 1:1~1:2.5.
6. slag as claimed in claim 5 fries the method that gypsum prepares gypsum dry mixed mortar, it is characterised in that: in the step 4)
Auxiliary agent includes the following component based on land plaster mass percent: citric acid 0.4~0.7%；Cellulose ether 0.15~0.5%；
Rubber powder 0.5~2%, water-reducing agent 0.8~1.2%.
7. slag as described in claim 1 fries the method that gypsum prepares gypsum dry mixed mortar, it is characterised in that: the slag is fried machine and adopted
Use rotary dryer.
8. slag as described in claim 1 fries the method that gypsum prepares gypsum dry mixed mortar, it is characterised in that: the ball mill is adopted
With single storehouse brief note ball mill, the Ceramic Balls of built-in φ 30mm.
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| AT404723B (en) * | 1997-04-09 | 1999-02-25 | Holderbank Financ Glarus | METHOD FOR PRODUCING SULFATE CEMENT OR SULFATE CEMENT ADDITIVES |
| CN101086181A (en) * | 2006-06-09 | 2007-12-12 | 王福山 | Heat-insulated sound-insulated building block and building method |
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| CN104211365B (en) * | 2014-09-13 | 2016-08-24 | 长沙海弘建材有限公司 | A kind of gypsum base decorative mortar and preparation method thereof |
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