CN114230217A - Cement grinding aid - Google Patents
Cement grinding aid Download PDFInfo
- Publication number
- CN114230217A CN114230217A CN202111400959.0A CN202111400959A CN114230217A CN 114230217 A CN114230217 A CN 114230217A CN 202111400959 A CN202111400959 A CN 202111400959A CN 114230217 A CN114230217 A CN 114230217A
- Authority
- CN
- China
- Prior art keywords
- grinding aid
- cement grinding
- cement
- diethanol
- retarder
- 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.)
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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
- 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
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/48—Clinker treatment
- C04B7/52—Grinding ; After-treatment of ground cement
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention discloses a cement grinding aid, which comprises, by mass, 4-10% of an alcamine compound, 10-15% of polyhydric alcohol, 3-10% of a retarder and the balance of water. The prepared cement grinding aid can enable the 28-day strength of cement prepared from mine limestone with excessive impurities to reach 59MPa, and compared with the 28-day strength of 50MPa before the cement grinding aid, the cement strength is improved by 18 percent and is higher than the national minimum standard of 52.5 MPa. The cement grinding aid is low in mixing amount, improves the quality of cement prepared from mine limestone with excessive impurities, improves the utilization rate of resources, and greatly reduces the production cost.
Description
Technical Field
The invention relates to the field of cement manufacturing, in particular to a cement grinding aid.
Background
Along with the expansion of the production scale of cement, limestone mines required by cement plants are also expanded, the demand for the exploitation of the limestone mines is gradually expanded, and a considerable part of mine limestone has excessive impurities, so that the produced clinker strength and cement ground by the clinker cannot reach the national standard and are discarded, thereby causing a great deal of resource waste.
The cement grinding aid is a chemical additive for improving the grinding effect and performance of cement, can be adsorbed on the surface of cement particles, plays a role in physical and chemical actions, can improve the machine-hour output of the cement under the condition of keeping the fineness of the ground cement and the power of a grinding machine unchanged, or can increase the specific surface area of the cement and improve the particle size grading of the ground cement under the condition of keeping the output of the cement and the power of the grinding machine unchanged, thereby improving the quality indexes of the cement such as strength and the like.
The existing cement grinding aid has an upper limit on grinding aiding capacity, so that the phenomena of wide particle distribution range and coarse product of a cement product are easy to occur, the strength of the cement is reduced, and the strength grade of the cement is even influenced.
Therefore, the development of a new cement grinding aid is urgently needed to solve the problem.
Disclosure of Invention
In view of the above situation, the present invention aims to provide a cement grinding aid and a preparation method thereof, wherein the cement grinding aid can obtain high-strength cement for mine limestone with excessive impurities.
The technical scheme for solving the problem is as follows:
a cement grinding aid comprises, by mass, 4-10% of an alcamine compound, 10-15% of polyhydric alcohol, 3-10% of a retarder and the balance of water.
Further, the alkanolamine compound comprises one or more of diethanol monoethanol amine, monoethanol diethanol amine, and diethanol monopropylamine.
Further, the polyhydric alcohol comprises one or more of glycerol, polyethylene glycol and ethylene glycol.
Further, the retarder comprises one or more of sodium gluconate, sodium hexametaphosphate, sodium polyphosphate, tartaric acid, molasses and calcium lignosulphonate.
Preferably, the cement grinding aid comprises an alcohol amine compound: 7% of diethanol mono-ethylene-propylene-amine, and the contents of polyhydric alcohols: 14% of glycerol, retarder: 6% of tartaric acid and water to 100%.
Preferably, the cement grinding aid comprises an alcohol amine compound: diethanol monopropanolamine and monoethanol diethanol propanolamine, the content is 8%, the polyhydric alcohol: polydiethylene glycol and ethylene glycol, the content being 12%, retarder: molasses and tartaric acid, the content of which is 10%, and water is supplemented to 100%, wherein the mass ratio of the diethanol monopropanolamine to the monoethanol diethanolamine is 1: 1, the mass ratio of the polydiethylene glycol to the ethylene glycol is 1: 3, and the mass ratio of the molasses to the tartaric acid is 2: 1.
Further, the preparation method of the cement grinding aid comprises the following steps: slowly adding the retarder into water while stirring, heating to 45-55 ℃, sequentially adding the alcohol amine compound and the polyol, keeping the water temperature, continuously stirring for 30-60 min, and cooling to normal temperature to obtain the cement grinding aid.
Further, the use method of the cement grinding aid comprises the following steps: and dripping the cement grinding aid into the grinding material by a metering device, wherein the proportion is 1-3 per mill.
Preferably, the use method of the cement grinding aid comprises the following steps: the cement grinding aid is dripped into the grinding material through a metering device, and the proportion is 1.5 per mill.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
1. the cement grinding aid provided by the invention can enable the 28-day strength of cement prepared from mine limestone with excessive impurities to reach 59MPa, and compared with the 28-day strength of 50MPa before the cement grinding aid, the cement strength is improved by 18% and is higher than the national minimum standard of 52.5 MPa.
2. The cement grinding aid disclosed by the invention is low in doping amount, the quality of cement prepared from mine limestone with excessive impurities is improved, the utilization rate of resources is improved, and the production cost is greatly reduced.
Detailed Description
Example 1
A cement grinding aid comprising an alcamines compound: 4% of diethanol-ethylene-propylene-amine, and the content of polyhydric alcohol: 10% of glycerol, and a retarder: 3% of sodium gluconate and water to 100%.
Example 2
A cement grinding aid comprising an alcamines compound: 5% of monoethanol diethanolamine, and the content of polyalcohol: 12% of polydiethylene glycol, retarder: sodium hexametaphosphate, the content is 4 percent, and water is supplemented to 100 percent.
Example 3
A cement grinding aid comprising an alcamines compound: diethanol monopropylamine, content 6%, polyol: ethylene glycol, content 13%, retarder: 5% of sodium polyphosphate, and water is supplemented to 100%.
Example 4
A cement grinding aid comprising an alcamines compound: 7% of diethanol mono-ethylene-propylene-amine, and the contents of polyhydric alcohols: 14% of glycerol, retarder: 6% of tartaric acid and water to 100%.
Example 5
A cement grinding aid comprising an alcamines compound: 8% of monoethanol diethanolamine, and 8% of polyhydric alcohol: 15% of polydiethylene glycol, retarder: molasses with a content of 7% and water to 100%.
Example 6
A cement grinding aid comprising an alcamines compound: diethanol monopropylamine, content 8%, polyol: ethylene glycol, content 14%, retarder: 8% of calcium lignosulphonate and water to 100%.
Example 7
A cement grinding aid comprising an alcamines compound: diethanol monopropylamine and monoethanol diethanolamine, the content being 10%, polyols: ethylene glycol, content 15%, retarder: the wood calcium and the tartaric acid account for 15 percent, and water is supplemented to 100 percent, wherein the mass ratio of the diethanol monopropylamine to the monoethanol diethylpropanolamine is 1: 1, and the mass ratio of the wood calcium to the tartaric acid is 2: 1.
Example 8
A cement grinding aid comprising an alcamines compound: diethanol monopropanolamine and monoethanol diethanol propanolamine, the content is 8%, the polyhydric alcohol: polydiethylene glycol and ethylene glycol, the content being 12%, retarder: molasses and tartaric acid, the content of which is 10%, and water is supplemented to 100%, wherein the mass ratio of the diethanol monopropanolamine to the monoethanol diethanolamine is 1: 1, the mass ratio of the polydiethylene glycol to the ethylene glycol is 1: 3, and the mass ratio of the molasses to the tartaric acid is 2: 1.
Example 9
Preparing the cement grinding aid 1-8 according to the following steps: slowly adding the retarder into water while stirring, heating to 45-55 ℃, sequentially adding the alcohol amine compound and the polyol, keeping the water temperature, continuously stirring for 30-60 min, and cooling to normal temperature to obtain the cement grinding aid.
And (3) cement grinding aid effect comparison test:
the grinding aid prepared in the embodiments 1-8 of the invention and a commercially available grinding aid (model: GA-100) are mixed into a cement grinding material for grinding, and then the corresponding cement strength is tested according to the method described in GB 175-1999. The test results are shown in table 1:
table 1 cement grinding aid test results:
note: the cement grinding is performed by a tube mill.
As can be seen from Table 1, the cement grinding aids disclosed in the examples of the present invention, when added to cement grinding materials, provide higher strength cement than commercially available cement grinding aids.
While the invention has been described in further detail with reference to specific embodiments thereof, it is not intended that the invention be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.
Claims (9)
1. The cement grinding aid is characterized by comprising, by mass, 4-10% of alcamines compounds, 10-15% of polyhydric alcohols, 3-10% of retarders and the balance of water.
2. The cement grinding aid as claimed in claim 1, wherein the alkanolamine compound comprises one or more of diethanol monopropanolamine, monoethanol diethanol propanolamine, and diethanol monopropylamine.
3. The cement grinding aid according to claim 1, wherein the polyol comprises one or more of glycerol, polyethylene glycol, and ethylene glycol.
4. The cement grinding aid as claimed in claim 1, wherein the retarder comprises one or more of sodium gluconate, sodium hexametaphosphate, sodium polyphosphate, tartaric acid, molasses and calcium lignosulphonate.
5. The cement grinding aid as claimed in claim 1, which comprises an alcohol amine compound: 7% of diethanol mono-ethylene-propylene-amine, and the contents of polyhydric alcohols: 14% of glycerol, retarder: 6% of tartaric acid and water to 100%.
6. The cement grinding aid as claimed in claim 1, which comprises an alcohol amine compound: diethanol monopropanolamine and monoethanol diethanol propanolamine, the content is 8%, the polyhydric alcohol: polydiethylene glycol and ethylene glycol, the content being 12%, retarder: molasses and tartaric acid, the content of which is 10%, and water is supplemented to 100%, wherein the mass ratio of the diethanol monopropanolamine to the monoethanol diethanolamine is 1: 1, the mass ratio of the polydiethylene glycol to the ethylene glycol is 1: 3, and the mass ratio of the molasses to the tartaric acid is 2: 1.
7. The cement grinding aid as claimed in claims 1 to 6, wherein the preparation method of the cement grinding aid comprises the following steps: slowly adding the retarder into water while stirring, heating to 45-55 ℃, sequentially adding the alcohol amine compound and the polyol, keeping the water temperature, continuously stirring for 30-60 min, and cooling to normal temperature to obtain the cement grinding aid.
8. The cement grinding aid as claimed in any one of claims 1 to 6, wherein the cement grinding aid is used by a method comprising: and dripping the cement grinding aid into the grinding material by a metering device, wherein the proportion is 1-3 per mill.
9. The cement grinding aid as claimed in claim 8, wherein the cement grinding aid is used by a method comprising: the cement grinding aid is dripped into the grinding material through a metering device, and the proportion is 1.5 per mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111400959.0A CN114230217A (en) | 2021-11-24 | 2021-11-24 | Cement grinding aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111400959.0A CN114230217A (en) | 2021-11-24 | 2021-11-24 | Cement grinding aid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114230217A true CN114230217A (en) | 2022-03-25 |
Family
ID=80750745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111400959.0A Pending CN114230217A (en) | 2021-11-24 | 2021-11-24 | Cement grinding aid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114230217A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116396100A (en) * | 2022-12-30 | 2023-07-07 | 焦作市新筑王材料科技有限公司 | Cement grinding aid and application method thereof in large-doping limestone cement |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503233A (en) * | 2011-10-19 | 2012-06-20 | 沈阳建筑大学 | Novel liquid cement grinding aid and preparation method thereof |
| CN102503232A (en) * | 2011-10-19 | 2012-06-20 | 沈阳建筑大学 | Environment-friendly, high-efficient and composite liquid cement grinding aid and preparation method thereof |
| CN105236796A (en) * | 2015-10-26 | 2016-01-13 | 南京永能新材料有限公司 | Limestone-cement liquid grinding aid and preparation method thereof |
| CN105541166A (en) * | 2015-12-30 | 2016-05-04 | 聊城大学 | Grinding aid for composite silicate cement with high limestone doping amount and preparation method thereof |
| CN106673479A (en) * | 2016-10-25 | 2017-05-17 | 广东弘朝科技有限公司 | Cement grinding aid used for gangue |
| JP2017210398A (en) * | 2016-05-27 | 2017-11-30 | デンカ株式会社 | Cement grinding aid and method for producing cement composition using the same |
| CN112521049A (en) * | 2020-12-14 | 2021-03-19 | 山东天汇科技有限公司 | Grinding aid for improving early strength of portland cement |
-
2021
- 2021-11-24 CN CN202111400959.0A patent/CN114230217A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503233A (en) * | 2011-10-19 | 2012-06-20 | 沈阳建筑大学 | Novel liquid cement grinding aid and preparation method thereof |
| CN102503232A (en) * | 2011-10-19 | 2012-06-20 | 沈阳建筑大学 | Environment-friendly, high-efficient and composite liquid cement grinding aid and preparation method thereof |
| CN105236796A (en) * | 2015-10-26 | 2016-01-13 | 南京永能新材料有限公司 | Limestone-cement liquid grinding aid and preparation method thereof |
| CN105541166A (en) * | 2015-12-30 | 2016-05-04 | 聊城大学 | Grinding aid for composite silicate cement with high limestone doping amount and preparation method thereof |
| JP2017210398A (en) * | 2016-05-27 | 2017-11-30 | デンカ株式会社 | Cement grinding aid and method for producing cement composition using the same |
| CN106673479A (en) * | 2016-10-25 | 2017-05-17 | 广东弘朝科技有限公司 | Cement grinding aid used for gangue |
| CN112521049A (en) * | 2020-12-14 | 2021-03-19 | 山东天汇科技有限公司 | Grinding aid for improving early strength of portland cement |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116396100A (en) * | 2022-12-30 | 2023-07-07 | 焦作市新筑王材料科技有限公司 | Cement grinding aid and application method thereof in large-doping limestone cement |
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Application publication date: 20220325 |
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