CN110357476A - A kind of novel powder cement grinding aid and preparation method thereof - Google Patents
A kind of novel powder cement grinding aid and preparation method thereof Download PDFInfo
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- CN110357476A CN110357476A CN201910597219.7A CN201910597219A CN110357476A CN 110357476 A CN110357476 A CN 110357476A CN 201910597219 A CN201910597219 A CN 201910597219A CN 110357476 A CN110357476 A CN 110357476A
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- grinding aid
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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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/52—Grinding aids; Additives added during grinding
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Disintegrating Or Milling (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention discloses a kind of novel powder cement grinding aid, is related to the field of construction material.Novel powder cement grinding aid of the invention includes the component of following parts by weight: 40-60 parts of flyash, 14-23 parts of sulphate aluminium cement, the synergy liquid of 25-35 parts of anhydrous sodium sulphate and 1-2 part, wherein synergy liquid is diethanol monoisopropanolamine, hydrochloric acid, foaming agent and water by made of simple chemical reaction.The invention also discloses the preparation methods of novel powder cement grinding aid.The present invention provides the grain fineness that novel powder cement grinding aid can effectively improve powder, improve mill hourly output, improve strength of cement, reduce cement clinker consumption, with better grinding dispersibility and good grinding-aid effect, and powdery cement grinding aid processing is prepared simply, and cost is relatively low, and performance is stablized.
Description
Technical field
The invention belongs to the technical field of construction material more particularly to a kind of novel powder cement grinding aid and its preparation sides
Method.
Background technique
Cement production process referred to as " two mills one are burnt ", i.e. raw grinding, Dayao is calcined and cement grinding, wherein cement grinding
It is the highest process procedure of energy consumption in cement production process, accounts for the 60-70% of entire production process power consumption.Cement pulverizing course
In, nearly 95% energy dissipates as heat and is disappeared, when cement fineness refines to a certain extent due to the group of subparticle
Poly- phenomenon causes cement grinding efficiency to decline, and grinding situation is caused to deteriorate, and mill efficiency sharply declines.Cement production enterprise is in life
When producing cement, to solve, grinding pow consumption is excessively high in cement production process, mill efficiency is low and improves strength of cement and other physics
Performance increases mixing material dosage, reduces the problems such as cost, cement grinding aid is often added.
Grinding aid in the prior art mainly has powder grinding aid and two kinds of liquid grinding aid.The group of liquid cement grinding additive
Dividing often has liquid grinding aid mother liquor, triethanolamine, polymerized polyalcohol, polyalcohol amine, triisopropanolamine, ethylene glycol, propylene glycol, third
Triol, sodium soap, calcium chloride, sodium chloride, sodium acetate, aluminum sulfate, calcium formate, calcium lignosulfonate, wooden sodium etc., though liquid cement grinding additive
Have the characteristics that volume is low, but exist simultaneously and be not easy to store, is complicated for operation, measures the drawbacks such as inaccurate.The group of powdery cement grinding aid
Dividing often has anhydrous sodium sulphate, Nacl, flyash, triethanolamine, powder grinding aid mother liquor etc., powdery cement grinding aid in the prior art
Agent is mostly the increase of strength of cement to be influenced smaller to improve based on cement grinding efficiency, and cement clinker consumption is big, usually
The early strength of cement is improved, the intensity in later period cannot be improved.The solution that existing powdery cement grinding aid cannot integrate
The problems in manufacture of cement cannot save more costs for cement production enterprise.
To solve the above-mentioned problems, overcome problems of the prior art, the present invention, which provides one kind, can effectively improve powder
The grain fineness of material improves mill hourly output, improves strength of cement, reduces cement clinker consumption, has better grinding point
Dissipate the powdery cement grinding aid of property and good grinding-aid effect, and powdery cement grinding aid processing prepare it is simple, cost compared with
Low, performance is stablized.
Summary of the invention
The present invention solves in the prior art that cement clinker consumption is big, and strength of cement reinforcing effect is unobvious, powdery cement
The problems such as grinding aid formula components are more and preparation steps are various, higher cost, and the powdery cement grinding aid has and preferably helps
Effect is ground, and performance is stablized.
In order to solve the above-mentioned technical problems, the present invention provides a kind of novel powder cement grinding aids, and raw material is by weight
It part include: 40-60 parts of flyash, 14-23 parts of sulphate aluminium cement, the synergy liquid of 25-35 parts of anhydrous sodium sulphate and 1-2 part.
Further, the synergy liquid stirs evenly the preparation method comprises the following steps: being slowly added to water into surfactant, so
Foaming agent is added until being completely dissolved under stirring afterwards, continues to stir 5-10min to uniformly to get synergy liquid.
Further, the synergy liquid stirs evenly the preparation method comprises the following steps: being slowly added to water into surfactant, so
Stirring continues to stir 5-10min to uniformly to get synergy liquid up to being completely dissolved afterwards.
Further, the surfactant the preparation method comprises the following steps: by diethanol monoisopropanolamine be added reaction kettle in,
It is uniform that it is slowly added to mixed in hydrochloric acid while stirring, obtains surfactant after being stirred for 10-15min.
Further, the mass ratio of the diethanol monoisopropanolamine and hydrochloric acid is 1:1~4:1.
Further, the time for the whole process that the hydrochloric acid is added controls in 10-15min.
The preparation method of novel powder cement grinding aid recited above, comprising the following steps:
(1) raw material is weighed by weight；
(2) flyash and anhydrous sodium sulphate are added in mortar mixer and are stirred, synergy liquid is then added, sufficiently
It stirs evenly.
(3) sulphate aluminium cement is added into the mixture in step (2), stirs up to powdery cement grinding aid
Agent.
Compared with prior art, the present invention achieves following the utility model has the advantages that powdery cement grinding aid provided by the invention is adopted
With flyash, sulphate aluminium cement, anhydrous sodium sulphate and synergy liquid by made of simple technical process, raw material is simple, without adding
Heat, preparation is simple, and preparation cost is low, and required equipment is few, high production efficiency, improves mill hourly output and strength of cement, reduces
Cement clinker consumption, and performance is stablized in use process；The formula and preparation method of synergy liquid are simple, and can effectively improve
The grain fineness of powder reduces grinding pow consumption, can dramatically increase Business Economic Benefit；Surfactant is using raw material two
Ethyl alcohol monoisopropanolamine is synthesized with hydrochloric acid by simple chemical enginnering process, and production cost is low, high production efficiency, tasteless,
It is nontoxic, non-ignitable, not quick-fried, secondary pollution will not be generated in use process.
Synergy liquid has osmosis, can prevent the crack closure of material, accelerate the expansion of crackle, be conducive to improve material
Pulverized speed, the crackle for generating powdery cement in grinding process do not reclose, so that powder particles is made to become smaller,
Reduce powder particles fineness；Synergy liquid has stronger peptizaiton, prevents adherency of the subparticle on flour mill and medium
And the reunion between particle, the flowability of powder can be improved, accelerate grinding speed, significantly improve mill efficiency, substantially mention
The quality of high ground prod, in the case where installed capacity is constant, the unit-hour output of grinding machine improves milling equipment, and per unit area yield power consumption is aobvious
Writing reduces；Synergy liquid can be adsorbed on powder particles surface, changed powder particles surface energy, improved the dynamic electricity of powder particles
Position expands the repulsive energy between particle, effectively prevent contacting with each other for powder particles, enhance the dispersibility and rheological characteristic of particle,
To increase the grindability of powdery cement, powder particles fineness is reduced, shortens grinding time, reduces grinding energy.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Below with reference to the specific implementation technical solution that the present invention will be described in detail, but the present invention is not limited to following embodiments.
Embodiment 1
The preparation method of novel powder cement grinding aid: weigh 1kg diethanol monoisopropanolamine raw material be added to it is dedicated
In reaction kettle, it is slowly added to the hydrochloric acid of 1kg while stirring, the addition time of hydrochloric acid is controlled and is completed in 10-15min, to salt
After the completion of acid is added, it is stirred for 10-15min, surfactant is made.
The above-mentioned surfactant for weighing 1kg, which is added in 1kg water, to stir evenly, and is then added under stirring
0.04g foaming agent continues to stir 5-10min to uniform, obtained synergy liquid up to being completely dissolved.
The anhydrous sodium sulphate of the flyash and 3kg that weigh 4.85kg, which is added in blender, to be stirred, and is then added
The above-mentioned synergy liquid of 0.15kg will be added the block formed after synergy liquid and smash to pieces, after stirring, adds the sulphur of 2.0kg
Aluminate cement stirs up to powdery cement grinding aid.
By 10kg material according to clinker 85%, gypsum 5%, mixing material 10% ratio ingredient, grinding time 20min
For A1；By 10kg material according to clinker 85%, gypsum 5%, mixing material 10%, the ratio of powder grinding aid 0.5% in the market
Ingredient, grinding time are that 20min is A2；By 10kg material according to clinker 85%, gypsum 5%, mixing material 10%, of the invention
The ratio ingredient of grinding aid 0.5%, grinding time are that 20min is A3；By 10kg material according to clinker 80%, gypsum 5%, mixing
The ratio ingredient of material 15%, grinding aid 0.5% of the invention, grinding time are that 20min is A4.Object is carried out to manufactured cement
Performance test is managed, inspection result is shown in Table 1.
The comparative test result of the different cement formulas of table 1
As it can be seen from table 1 the cement of 0.5% powdery cement grinding aid of the invention is added, specific surface area increases, cement
Fineness reduces, and anti-folding and compression strength increase, and compared with certain grinding aid in the market, performance is also relatively superior；When ripe
When material reduces 5%, cement performance of the comprehensive performance of cement also than grinding aid being not added with certain grinding aid being added is strong.
Embodiment 2
The preparation method of novel powder cement grinding aid: weigh 3kg diethanol monoisopropanolamine raw material be added to it is dedicated
In reaction kettle, it is slowly added to the hydrochloric acid of 2kg while stirring, the addition time of hydrochloric acid is controlled and is completed in 10-15min, to salt
After the completion of acid is added, it is stirred for 10-15min, surfactant is made.
The above-mentioned surfactant for weighing 1kg, which is added in 1kg water, to stir evenly, and is then added under stirring
0.04g foaming agent continues to stir 5-10min to uniform, obtained synergy liquid up to being completely dissolved.
The anhydrous sodium sulphate of the flyash and 3.5kg that weigh 4.0kg, which is added in blender, to be stirred, and is then added
The above-mentioned synergy liquid of 0.2kg will be added the block formed after synergy liquid and smash to pieces, after stirring, adds the sulphur aluminium of 2.3kg
Acid salt cement stirs up to powdery cement grinding aid.
By 10kg material according to clinker 85%, gypsum 5%, mixing material 10% ratio ingredient, grinding time 20min
For B1；By 10kg material according to clinker 85%, gypsum 5%, mixing material 10%, the ratio of powder grinding aid 0.3% in the market
Ingredient, grinding time are that 20min is B2；By 10kg material according to clinker 85%, gypsum 5%, mixing material 10%, of the invention
The ratio ingredient of grinding aid 0.3%, grinding time are that 20min is B3；By 10kg material according to clinker 80%, gypsum 5%, mixing
The ratio ingredient of material 15%, grinding aid 0.3% of the invention, grinding time are that 20min is B4.Object is carried out to manufactured cement
Performance test is managed, inspection result is shown in Table 2.
The comparative test result of the different cement formulas of table 2
From table 2 it can be seen that the cement of 0.3% powdery cement grinding aid of the invention is added, specific surface area increases, cement
Fineness reduces, and anti-folding and compression strength increase, and compared with certain grinding aid in the market, performance is also relatively superior；When ripe
When material reduces 5%, cement performance of the comprehensive performance of cement also than grinding aid being not added with certain grinding aid being added is strong.
Embodiment 3
The preparation method of novel powder cement grinding aid: weigh 2kg diethanol monoisopropanolamine raw material be added to it is dedicated
In reaction kettle, it is slowly added to the hydrochloric acid of 1kg while stirring, the addition time of hydrochloric acid is controlled and is completed in 10-15min, to salt
After the completion of acid is added, it is stirred for 10-15min, surfactant is made.
The above-mentioned surfactant for weighing 1kg, which is added in 1kg water, to stir evenly, and is then added under stirring
0.04g foaming agent continues to stir 5-10min to uniform, obtained synergy liquid up to being completely dissolved.
The anhydrous sodium sulphate of the flyash and 2.5kg that weigh 6.0kg, which is added in blender, to be stirred, and is then added
The above-mentioned synergy liquid of 0.1kg will be added the block formed after synergy liquid and smash to pieces, after stirring, adds the sulphur aluminium of 1.4kg
Acid salt cement stirs up to powdery cement grinding aid.
By 10kg material according to clinker 85%, gypsum 5%, mixing material 10% ratio ingredient, grinding time 20min
For C1；By 10kg material according to clinker 85%, gypsum 5%, mixing material 10%, the ratio of powder grinding aid 0.5% in the market
Ingredient, grinding time are that 20min is C2；By 10kg material according to clinker 85%, gypsum 5%, mixing material 10%, of the invention
The ratio ingredient of grinding aid 0.5%, grinding time are that 20min is C3；By 10kg material according to clinker 85%, gypsum 5%, mixing
The ratio ingredient of material 10%, grinding aid 0.3% of the invention, market liquid grinding aid 0.2%, grinding time are that 20min is
C4；By 10kg material according to clinker 82%, gypsum 5%, mixing material 13%, the ratio ingredient of grinding aid 0.5% of the invention,
Grinding time is that 20min is C5.Physical property test is carried out to manufactured cement, inspection result is shown in Table 3.
The comparative test result of the different cement formulas of table 3
From table 3 it can be seen that the cement of 0.5% powdery cement grinding aid of the invention is added, specific surface area increases, cement
Fineness reduces, and anti-folding and compression strength increase, and compared with certain grinding aid in the market, performance is also relatively superior；When ripe
When material reduces 3%, cement performance of the comprehensive performance of cement also than grinding aid being not added with certain grinding aid being added is strong；When this hair
Bright 0.3% powdery cement grinding aid and market liquid grinding aid are used cooperatively, and comprehensive performance is more preferable.
It is worth noting that, the water being added in the preparation method of synergy liquid is table depending on foundation on-site actual situations
The mass ratio of face activating agent and water is 1:4-1:1.
It is worth noting that, depending on the foaming agent added in embodiment 1-3 preparation method can be according to actual conditions, Ji Ketian
Add or do not add, the additive amount of foaming agent controls the 0-0.002% in synergy liquid total amount.
Embodiment 4
The application method of powdery cement grinding aid: being measured in 0.2%-0.5% ratio, be uniformly added into cement ball mill,
With clinker, gypsum, mixing material intergrinding.Coal addition position can be on the belt of conveying mill feed material, also can be after powder concentrator
Coarse powder feed back spiral on.Measuring equipment can use metering screw, and can also be shaken machine with small electrical, conditional available computer metering.
Metering is accurate, and is strictly added by the match ratio tested after determining.
Mill feed material integrates moisture content≤1.5%.After adding powdery cement grinding aid, since material flow is accelerated, reply is ground
The gradation of mill body and the parameter of powder concentrator carry out appropriate adjustment, to guarantee the optimum of product quality and grinding machine.
According to the test result of embodiment 1-3, novel powder cement grinding aid economic benefit is analyzed:
1, by 350 yuan/ton of clinker price, 60 yuan/ton of mixing material average price, 400 yuan/ton of finished cement price,
2000 yuan/ton of powdery cement grinding aid price calculating, 1 ton of cement economic benefit situation are as follows:
(1) cement clinker consumption 3-5% can be reduced using powdery cement grinding aid, by 3% calculating cost-saved 350 ×
3%=10.5 member.
(2) mixing material dosage 3% need to be increased, cost 60 × 3%=1.8 member need to be increased.
(3) increased costs 2000 × 0.3%=6 member that powdery cement grinding aid is brought into.
(4) powdery cement grinding aid is included in that cement component is per ton to reduce cost 400 × 0.3%=1.2 member.
(5) 1 tons of cement can save the cost again: 10.5-1.8-6+1.2=3.9 member.
2, economic benefit comprehensive calculation and analysis: being calculated as above, produce per year 1,000,000 tons cement grinding plant year economic benefit can
Up to 3.9 × 1,000,000=3,900,000 yuan.
The powdery cement grinding aid mechanism of action:
1, in cement pulverizing course, powdery cement grinding aid can effectively inhibit the " polarity of the agglomeration of cement granules
Macromolecular ".
2, in cement production process, since feed particles all have fault of construction and micro-crack, by regulation volume incorporation
After powdery cement grinding aid, defect and micro-crack position are equally entered just as chock, forms powerful expansion inside raw material
Stress, when mill running, abrasive body hits and squeezes these cement raw material particles to be made due to the collective effect of interior external carbuncle
Cement is more easier levigate, plays the role of grinding aid, increases the specific surface area of cement, improve cement granules gradation, by
Become larger in the contact area of hydrated reaction of cement, to substantially increase strength of cement again.
3, there are the various crystal seeds similar to entringite in the molecule crystallographic texture of powdery cement grinding aid component, in cement
During hydration reaction, since the Behavior of Hardened Cement Paste solid solution plastic structure that solid phase reaction generates is similar to crystal seed, their mutual phased solns, dispersion
A large amount of intermediate products and Free water are absorbed, hole caused by the discreteness and free water evaporation of Behavior of Hardened Cement Paste sol particle is reduced
Gap, cavity and fault of construction, make more closely knit, uniform, continuous inside entire Behavior of Hardened Cement Paste, improve the intensity of Behavior of Hardened Cement Paste.
4, cross action enhances mechanism, produces cement using clinker, mixing material, gypsum and powdery cement grinding aid, wherein
Between any two kinds of materials, it can interact, react to each other after adding water hydratable, form a large amount of column entringite, synusia
Shape Ca (OH)2Crystal and netted, fibrous aquation CSH gel, these products are filled each other, are wound mutually, by Behavior of Hardened Cement Paste
It is bonded to an entirety securely, composition one contains the closely knit mansion of a large amount of gel pores, while each component lattice is in gradually water
It can also increase along different directions when change, effectively compensate for not closely knit enough position, reducing one-component aquation not can overcome the disadvantages that
Defect, play and be combined with each other, effectively utilize respective advantage reinforcing effect, generate folded structures effect, keep cement strong
Degree greatly improves.
By above specific embodiment and field practice, novel powder cement grinding aid of the invention also has following excellent
Gesture:
(1) there is good grinding-aid effect, reduce cement clinker consumption, improve mill hourly output, reduce grinding pow consumption.
(2) break material of the original powder grinding aid based on salt, not chloride ion-containing, do not influence cement using this product
The content of middle chloride ion.
(3) at present liquid cement grinding additive do not clash, be used cooperatively better effect.
(4) have the function of energy conservation, reduce production cost.
Each technical characteristic of embodiment described above can carry out any combination, for simplicity of description, not to above-mentioned implementation
The all possible combination of each technical characteristic in example is all described, as long as however, the combination of these technical characteristics is not present
Contradiction all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
Limitations on the scope of the patent of the present invention therefore cannot be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Protect range.
Claims (7)
1. a kind of novel powder cement grinding aid, which is characterized in that its raw material includes: 40-60 parts of flyash by weight,
14-23 parts of sulphate aluminium cement, the synergy liquid of 25-35 parts of anhydrous sodium sulphate and 1-2 part.
2. novel powder cement grinding aid according to claim 1, which is characterized in that the preparation method of the synergy liquid
Are as follows: water is slowly added into surfactant and is stirred evenly, and foaming agent is then added under stirring until be completely dissolved, after
Continuous stirring 5-10min is to uniformly to get synergy liquid.
3. novel powder cement grinding aid according to claim 1, which is characterized in that the preparation method of the synergy liquid
Are as follows: water is slowly added into surfactant and is stirred evenly, and then stirring is until be completely dissolved, and continues to stir 5-10min to equal
It is even to get synergy liquid.
4. novel powder cement grinding aid according to claim 2 or 3, which is characterized in that the system of the surfactant
Preparation Method are as follows: it is uniform by mixed in hydrochloric acid in diethanol monoisopropanolamine addition reaction kettle, is slowly added to while stirring, it is stirred for
Surfactant is obtained after 10-15min.
5. novel powder cement grinding aid according to claim 4, which is characterized in that the diethanol monoisopropanolamine with
The mass ratio of hydrochloric acid is 1:1~4:1.
6. novel powder cement grinding aid according to claim 5, which is characterized in that the whole process that the hydrochloric acid is added
Time control in 10-15min.
7. the preparation method of novel powder cement grinding aid described in claim 1, which comprises the following steps:
(1) raw material is weighed by weight；
(2) flyash and anhydrous sodium sulphate are added in mortar mixer and are stirred, synergy liquid is then added, be sufficiently stirred
Uniformly.
(3) sulphate aluminium cement is added into the mixture in step (2), stirs up to powdery cement grinding aid.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115093137A (en) * | 2022-06-23 | 2022-09-23 | 湖南格林朗科技有限公司 | Cement grinding aid and preparation method thereof |
| CN115385600A (en) * | 2022-08-12 | 2022-11-25 | 湖南格林朗科技有限公司 | Grinding-aid mixture, preparation method and application thereof, and composite liquid cement grinding aid |
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| CN115093137A (en) * | 2022-06-23 | 2022-09-23 | 湖南格林朗科技有限公司 | Cement grinding aid and preparation method thereof |
| CN115385600A (en) * | 2022-08-12 | 2022-11-25 | 湖南格林朗科技有限公司 | Grinding-aid mixture, preparation method and application thereof, and composite liquid cement grinding aid |
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Application publication date: 20191022 |