CN113105154A - Grinding aid and cement clinker grinding method using same - Google Patents
Grinding aid and cement clinker grinding method using same Download PDFInfo
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- CN113105154A CN113105154A CN202110411379.5A CN202110411379A CN113105154A CN 113105154 A CN113105154 A CN 113105154A CN 202110411379 A CN202110411379 A CN 202110411379A CN 113105154 A CN113105154 A CN 113105154A
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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
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/48—Clinker treatment
- C04B7/52—Grinding ; After-treatment of ground cement
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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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- Disintegrating Or Milling (AREA)
Abstract
The application relates to the field of cement grinding aids, and particularly discloses a grinding aid and a cement clinker grinding method using the grinding aid. A grinding aid comprises a primary grinding agent and a secondary additive grinding agent in a weight ratio of (2-3) to 1; a cement clinker grinding method using the grinding aid comprises the following steps: step S1: mixing cement clinker with a primary grinding agent, and then rolling and crushing to obtain a pre-crushed material; step S2: mixing the pre-crushed material and a secondary grinding agent, and then sequentially carrying out coarse grinding and fine grinding to obtain mixed powder; step S3: and selecting the mixed powder, outputting and storing the qualified powder, and returning the unqualified powder to the fine grinding step for continuous grinding. The grinding aid can be used for cement grinding, and has the advantages of improving the fineness of cement powder grinding and reducing the grinding energy consumption.
Description
Technical Field
The application relates to the field of grinding aids, in particular to a grinding aid and a cement clinker grinding method using the grinding aid.
Background
The grinding process of the cement clinker is an operation with high energy consumption, and particularly, the energy consumption is higher when the minerals are finely ground and ultra-finely ground. Statistics show that the electric energy consumed by grinding all over the world accounts for about 5% of the total power generation amount in the current year.
In order to reduce the frictional resistance between the raw materials for grinding and reduce the agglomeration of fine particles during the grinding process, grinding raw materials are usually ground by adding a grinding aid. The grinding aid reduces the surface energy increased by forming a new surface after the raw materials are crushed in the grinding process, so that the effect of reducing the resistance in the grinding process is achieved, the energy consumption of the grinding is reduced, and the grinding quality is improved.
However, in the related art, the grinding aid usually has a single component, and cannot adapt to various complicated working conditions encountered by grinding, and the grinding effect is greatly reduced due to different actual working conditions. Particularly, in the process of grinding cement clinker, because only a grinding aid with single component is added in the process of ball milling for grinding, the energy consumption can be reduced to a certain extent, but under the condition that the cement clinker needs to be ground to be higher in fineness, the energy consumption of grinding is still higher, and the grinding quality needs to be improved.
Disclosure of Invention
In order to further reduce the grinding energy consumption and improve the grinding effect of the grinding aid, the application provides the grinding aid and a cement clinker grinding method using the grinding aid.
In a first aspect, the present application provides a grinding aid, which adopts the following technical scheme:
the grinding aid is characterized by comprising a primary grinding agent and a secondary additive grinding agent in a weight ratio of (2-3) to 1, wherein the primary grinding agent comprises the following raw materials in parts by weight:
the secondary addition grinding agent comprises the following raw materials in parts by weight:
by adopting the technical scheme, the grinding aid is obtained by combining a primary grinding agent and a secondary additive grinding agent, wherein the primary grinding agent is used for increasing cracks generated on cement clinker when the cement clinker is crushed, and reducing the recombination of the cracks generated on the cement clinker under the action of internal stress generated during crushing; the secondary addition of the grinding agent is used for reducing the phenomenon of agglomeration among cement clinker particles with reduced particle size after grinding and reducing the resistance during grinding of the cement clinker when the cement clinker is ground, thereby improving the quality of the ground cement clinker and reducing the power consumption of the grinding.
The silane in the silane coupling agent in the primary grinding agent can be embedded into gaps generated in the crushing process of cement clinker, so that the gaps formed on the crushed cement plastic are prevented from being recombined. When water in the secondary grinding agent contacts with the cement clinker, the silane coupling agent in the cement clinker is hydrolyzed to be silanol and further combined with the surface of the cement clinker to carry out surface modification, so that the cement clinker is not easy to generate secondary polymerization to influence the grinding effect during further grinding, and the modified surface of the cement clinker is easier to adsorb components such as ammonium acetate, gypsum powder and the like in the secondary addition grinding agent, so that the grinding efficiency during grinding of the cement clinker is improved, and the grinding quality is improved.
The maleic acid in the primary grinding agent has the effects of softening cement clinker and increasing cracks of the cement clinker through the weak acidic corrosion capability, so that components such as a silane coupling agent and the like in the primary grinding agent can enter the cracks of the cement clinker more easily, and the crushing and subsequent grinding effects are improved. Secondly, the carboxylic acid group in the maleic acid can play a role in retarding the concrete in the process of using the cement for preparing the concrete, and the hardening of the cement is delayed.
Preferably, the raw materials of the primary grinding agent are also added with 1-3 parts by weight of synergist, and the synergist is a mixture of sodium carbonate and sodium bicarbonate in a weight ratio of 1: 1-2.
By adopting the technical scheme, the sodium carbonate and the sodium bicarbonate can be used for carrying out auxiliary grinding on particles such as silicate, silicon dioxide and alumina with higher hardness in the cement clinker, and the synergist is added into the primary grinding agent, so that the auxiliary crushing effect on the cement clinker can be realized when the cement clinker is crushed, the crushing effect is improved, and the crack quantity is increased.
Preferably, the secondary grinding agent is also added with 1-2 parts by weight of additive, and the additive comprises glucose and sorbitol in a weight ratio of 1: 0.5-1.
By adopting the technical scheme, the glucose and the sorbitol contain more hydroxyl groups, and during the process of grinding the cement clinker, the crushed and ground cement clinker particles can easily adsorb the glucose and the sorbitol, so that the cement clinker with increased surface energy due to smaller particle size is not easy to agglomerate, and the secondary agglomeration of the ground cement clinker is prevented from causing the larger particle size of the powder.
In a second aspect, the application provides a cement grinding method using the grinding aid, which adopts the following technical scheme:
a cement grinding method using the grinding aid comprises the following steps:
step S1: mixing cement clinker with a primary grinding agent, and then rolling and crushing to obtain a pre-crushed material;
step S2: mixing the pre-crushed material and a secondary grinding agent, and then sequentially carrying out coarse grinding and fine grinding to obtain mixed powder;
step S3: and selecting the mixed powder, outputting and storing the qualified powder, and returning the unqualified powder to the fine grinding step for continuous grinding.
By adopting the technical scheme, the cement clinker doped with the primary grinding agent is crushed by adopting a rolling crushing mode, the crushing mode of the cement clinker is extrusion crushing, when the cement clinker is crushed to generate cracks in the rolling process, the primary grinding agent doped in the cement clinker is easier to mix with the cement clinker, and the maleic acid and the silane coupling agent in the primary grinding agent can better enter the cracks of the cement clinker to play a role. Secondly, the cement clinker can be ground more uniformly in the grinding process by adopting two modes of coarse grinding and fine grinding, and the grinding quality is better.
Preferably, the rolling in step S1 includes two rolling operations, and the raw material after the first rolling operation is sprayed between the two rolling operations, and the spraying amount is 0.5-0.6% of the mass of the cement clinker.
By adopting the technical scheme, two times of rolling are adopted, and a small amount of water is sprayed on the cement clinker between the two times of rolling, so that the middle part of the silane coupling agent attached to the cement clinker is contacted with the sprayed water to promote the silane coupling agent to generate hydrolysis reaction in advance in cracks of the cement clinker, the surface of the cement clinker is modified in advance, the cement clinker is further crushed by the secondary rolling, the cracks in the cement clinker are increased, and the grinding effect of the cement clinker is improved.
Preferably, 0.5-1 part of carboxymethyl cellulose rag is further added into the secondary grinding agent, and the carboxymethyl cellulose rag is soaked in ice water until the water absorption is saturated.
By adopting the technical scheme, when the crushed carboxymethyl cellulose which absorbs ice water saturation is ground together with cement clinker, the ice water absorbed in the crushed carboxymethyl cellulose can be released due to extrusion in the grinding process, so that the temperature rise caused by heat generated by friction in the grinding process is relieved, the aggregation of cement due to electrostatic attraction caused by overhigh temperature in the grinding process is avoided, and the grinding efficiency is reduced.
Preferably, in step S2, before the fine grinding operation, a third auxiliary grinding agent is added to the coarse ground product, where the third auxiliary grinding agent includes the following components in parts by weight:
30-38 parts of modified alcohol amine mother liquor;
10-12 parts of deionized water at the temperature of 1-5 ℃;
and 2-2 parts of an alkali-resistant penetrating agent OEP-701.
Through adopting above-mentioned technical scheme, modified alcohol amine mother liquor can play the effect of helping with grinding to cement, cooperates the secondary to add the grinding agent simultaneously and improves the effect of ground. The temperature of the product after coarse grinding can be reduced by the deionized water at the temperature of 1-5 ℃, so that the heat generated by friction in the fine grinding stage can be slowed down, and the phenomenon that the temperature rises too fast during grinding to cause agglomeration of ground cement clinker to influence the grinding effect is avoided to a certain extent. The alkali-resistant penetrant OEP-70 has good effect of assisting the modified alcohol amine mother liquor to permeate into cracks of cement clinker in the grinding process, and provides the effect of preventing the cracks generated on the cement clinker from being healed.
Preferably, the preparation method of the modified alcohol amine mother liquor comprises the following steps:
step 1: completely dissolving sodium chloroacetate in deionized water at 50-80 ℃ to prepare a base fluid;
step 2: dropwise adding a sodium hydroxide aqueous solution with the mass concentration of 32% into the prepared matrix to maintain the pH value of the solution system at 11-12;
and step 3: dropping diethanolamine into the solution system obtained in the step 2 at the temperature of 60 ℃, and stirring at the constant temperature for 1-2h to obtain a modified alcohol amine mother liquor;
wherein the molar ratio of the sodium chloroacetate to the deionized water to the aqueous solution of sodium hydroxide to the diethanolamine is 1:5:1: 1.
In summary, the present application has the following beneficial effects:
1. because the grinding aid formula with multiple components is adopted, and the mode of jointly matching and using the primary grinding agent and the secondary grinding agent is adopted, the grinding aid effect is improved, and the retarding performance of cement with the grinding aid is improved.
2. In the application, the synergist is preferably added into the primary grinding agent, and the synergist can improve the pretreatment capacity of the primary grinding agent, so that the effect of improving the grinding quality of the grinding aid is obtained.
3. According to the grinding method, the rolling pretreatment and coarse grinding and fine grinding are adopted, and each step is optimized according to the grinding aid, so that the effect of improving the grinding quality of the grinding aid on cement clinker is obtained.
Detailed Description
The present application will be described in further detail with reference to examples.
The alkali-resistant penetrant OEP-70 is selected from alkali-resistant penetrant OEP-70 of Haian petrochemical plant of Jiangsu province;
the silane coupling agent is KH-560 silane coupling agent from Nanjing Quanxi chemical company Limited.
Preparation example
Preparation example 1
The preparation method of the modified alcohol amine mother liquor comprises the following steps:
step 1: weighing the raw materials according to the molar ratio of 1:5:1:1 of sodium chloroacetate to deionized water to sodium hydroxide to diethanolamine for later use, and completely dissolving the sodium chloroacetate in the deionized water at 50 ℃ to prepare a base fluid; preparing sodium hydroxide into a sodium hydroxide aqueous solution with the mass concentration of 32%;
step 2: dropwise adding a sodium hydroxide aqueous solution with the mass concentration of 32% into the prepared base fluid to maintain the pH value of a solution system at 11;
and step 3: and (3) adding diethanolamine dropwise into the solution system obtained in the step (2) at the temperature of 60 ℃, and stirring at the constant temperature for 1h to obtain the modified alcohol amine mother liquor.
Preparation example 2
The difference from preparation example 1 is that: in the step 1, sodium chloroacetate is dissolved in deionized water at 65 ℃, the pH value of a solution system in the step 2 is maintained at 11.5, and the solution is stirred for 1.5 hours at constant temperature in the step 3.
Preparation example 3
The difference from preparation example 1 is that: dissolving sodium chloroacetate in step 1 in deionized water at 80 ℃, maintaining the pH value of a solution system in step 2 at 12, and stirring at constant temperature for 2h in step 3.
Examples
Example 1
A grinding aid and a cement clinker grinding method using the grinding aid are provided, wherein the grinding aid comprises a primary grinding agent and a secondary additive grinding agent in a weight ratio of 2.5: 1, and the primary grinding agent comprises the following raw materials in parts by weight:
the secondary addition grinding agent comprises the following raw materials in parts by weight:
a cement grinding method using the grinding aid comprises the following steps:
step S1: mixing cement clinker with a primary grinding agent, and then rolling and crushing to obtain a pre-crushed material; wherein the mixing amount of the primary grinding agent is 0.02 percent of the cement;
step S2: mixing the pre-crushed material and the secondary added grinding agent, and then sequentially carrying out coarse grinding and fine grinding to obtain mixed powder; wherein the mixing amount of the secondary grinding agent is 0.03 percent of that of the cement;
step S3: and selecting the mixed powder, outputting and storing the qualified powder, and returning the unqualified powder to the fine grinding step for continuous grinding.
Examples 2 to 5
Examples 2 to 5 are different from example 1 in that the ratio between the primary grinding agent and the secondary additive grinding agent and the components in the primary grinding agent and the components in the secondary additive grinding agent are shown in Table 1.
TABLE 1
Example 6
The difference between the embodiment 6 and the embodiment 1 is that the primary grinding agent is also added with a synergist, and the specific components are as follows:
wherein the synergist is a mixture of sodium carbonate and sodium bicarbonate with the weight ratio of 1:1
Example 7
Example 7 differs from example 6 in that the synergist is a mixture of sodium carbonate and sodium bicarbonate in a weight ratio of 1: 1.5
Example 8
Example 8 differs from example 6 in that the synergist is a 1: 2 by weight mixture of sodium carbonate and sodium bicarbonate
Example 9
The difference between the embodiment 9 and the embodiment 1 is that the secondary grinding agent is also added with additives, and the specific components are as follows:
wherein the additive comprises glucose and sorbitol with the weight ratio of 1: 0.5.
Example 10
Example 10 differs from example 9 in that the additive comprises glucose and sorbitol in a weight ratio of 1: 0.75.
Example 11
Example 11 differs from example 9 in that the additive comprises glucose and sorbitol in a weight ratio of 1: 1.
Example 12
The difference between the embodiment 12 and the embodiment 1 is that 0.5 part of carboxymethyl cellulose rag is also added in the secondary grinding agent, the carboxymethyl cellulose rag with the area between 0.01 and 0.1 square centimeter is selected as the carboxymethyl cellulose rag, and the carboxymethyl cellulose rag is soaked in ice water until the carboxymethyl cellulose rag is saturated with water.
Example 13
Example 13 is different from example 12 in that 0.75 part of carboxymethyl cellulose rag was added to the secondary addition of the grinding agent.
Example 14
Example 14 is different from example 12 in that 1 part of carboxymethyl cellulose rag was added to the secondary addition of the grinding agent.
Example 15
Example 15 differs from example 1 in that in step S2, a tertiary auxiliary grinding agent is added to the product after coarse grinding in an amount of 0.01% of the cement, the tertiary auxiliary grinding agent comprising the following components in parts by weight:
34 parts of modified alcohol amine mother liquor;
11 parts of deionized water at the temperature of 1-5 ℃;
and (3) alkali-resistant penetrant OEP-701.5 parts.
Wherein the modified alcohol amine mother liquor is the modified alcohol amine mother liquor prepared in the preparation example 1.
Examples 16 to 19
Examples 16-19 differ from example 11 in that the components of the tertiary auxiliary grinding agent are listed in Table 2.
TABLE 2
In examples 16 to 19, the modified alcohol amine mother liquor prepared in preparation example 2 was used as the modified alcohol amine mother liquor in example 16; the modified alcohol amine mother liquor obtained in preparation example 3 was selected as the modified alcohol amine mother liquor in example 17; the modified alcohol amine mother liquor obtained in preparation example 2 is selected as the modified alcohol amine mother liquor in example 18; the modified alcohol amine mother liquor prepared in preparation example 2 is selected as the modified alcohol amine mother liquor in example 19;
example 20
The difference between the example 20 and the example 1 is that the rolling operation in the step S1 specifically includes two rolling operations, and the raw material after the first rolling operation is sprayed with deionized water between the two rolling operations, and the spraying amount is 0.5% of the mass of the cement clinker.
Example 21
The difference between example 21 and example 1 is that the rolling operation in step S1 specifically includes two rolling operations, and the raw material after the first rolling operation is sprayed with water between the two rolling operations, and the spraying amount is 0.6% of the mass of the cement clinker.
Example 22
A grinding aid and a cement clinker grinding method using the grinding aid are provided, wherein the grinding aid comprises a primary grinding agent and a secondary added grinding agent in a weight ratio of 2: 1, and the primary grinding agent comprises the following raw materials in parts by weight:
wherein the synergist is a mixture of sodium carbonate and sodium bicarbonate with the weight ratio of 1:1
The secondary addition grinding agent comprises the following raw materials in parts by weight:
wherein the additive comprises glucose and sorbitol with the weight ratio of 1: 0.5.
A cement grinding method using the grinding aid comprises the following steps:
step S1: mixing cement clinker with a primary grinding agent, rolling and crushing for two times, and spraying deionized water to a product obtained after the primary rolling between the two rolling operations, wherein the spraying amount is 0.5 percent of the mass of the cement clinker, so as to obtain a pre-crushed material; wherein the mixing amount of the primary grinding agent is 0.02 percent of the cement;
step S2: mixing the pre-crushed material and the secondary added grinding agent, and then sequentially carrying out coarse grinding and fine grinding, wherein a tertiary auxiliary grinding agent is added into a product obtained after coarse grinding, and the tertiary auxiliary grinding agent comprises the following components in parts by weight:
34 parts of modified alcohol amine mother liquor;
11 parts of deionized water at the temperature of 1-5 ℃;
alkali-resistant penetrant OEP-701.5 parts;
wherein, the modified alcohol amine mother liquor is the modified alcohol amine mother liquor prepared in the preparation example 2;
the mixing amount of the secondary grinding agent is 0.03 percent of that of the cement; the mixing amount of the tertiary auxiliary grinding agent is 0.01 percent of the cement;
coarse grinding and fine grinding to obtain mixed powder;
step S3: and selecting the mixed powder, outputting and storing the qualified powder, and returning the unqualified powder to the fine grinding step for continuous grinding.
Comparative example
Comparative example 1
A grinding aid and a cement clinker grinding method using the grinding aid are disclosed, wherein the grinding aid comprises the following raw materials in parts by weight:
a cement grinding method using the grinding aid comprises the following steps:
step S1: mixing cement clinker with grinding aid with the mixing amount of 0.02% of the cement, and then rolling and crushing to obtain a pre-crushed material;
step S2: carrying out coarse grinding and fine grinding on the pre-crushed material in sequence to obtain mixed powder;
step S3: and selecting the mixed powder, outputting and storing the qualified powder, and returning the unqualified powder to the fine grinding step for continuous grinding.
Comparative example 2
A grinding aid and a cement clinker grinding method using the grinding aid are disclosed, wherein the grinding aid comprises the following raw materials in parts by weight:
a cement grinding method using the grinding aid comprises the following steps:
step S1: rolling and crushing the cement clinker to obtain a pre-crushed material;
step S2: mixing the pre-crushed material with a grinding aid with the mixing amount of 0.03 percent of cement, and then sequentially carrying out coarse grinding and fine grinding to obtain mixed powder;
step S3: and selecting the mixed powder, outputting and storing the qualified powder, and returning the unqualified powder to the fine grinding step for continuous grinding.
Comparative example 3
A method of grinding cement comprising the steps of:
step S1: rolling and crushing the cement clinker to obtain a pre-crushed material;
step S2: the pre-crushed material is subjected to coarse grinding and fine grinding in sequence, before the fine grinding operation, a tertiary auxiliary grinding agent with the mixing amount of 0.01 percent of cement is added into a product after the coarse grinding, and the tertiary auxiliary grinding agent comprises the following components in parts by weight:
34 parts of modified alcohol amine mother liquor;
11 parts of deionized water at the temperature of 1-5 ℃;
and (3) alkali-resistant penetrant OEP-701.5 parts.
Obtaining mixed powder;
step S3: and selecting the mixed powder, outputting and storing the qualified powder, and returning the unqualified powder to the fine grinding step for continuous grinding.
Comparative example 4
A cement grinding aid is commercially available from Shandong Tuotai building materials science and technology Co.
A cement grinding method using the grinding aid comprises the following steps:
step S1: rolling and crushing the cement clinker to obtain a pre-crushed material;
step S2: mixing the pre-crushed material and grinding aid in an amount of 0.03 percent of the cement, and then sequentially carrying out coarse grinding and fine grinding to obtain mixed powder;
step S3: and selecting the mixed powder, outputting and storing the qualified powder, and returning the unqualified powder to the fine grinding step for continuous grinding.
Performance test
Grinding aid effect test
The cement powders obtained by grinding 5kg of cement clinker per sample by the grinding methods of examples 1 to 22 and comparative examples 1 to 3 were tested by a negative pressure sieving method using test sieves of 180 mesh and 325 mesh, respectively, and the tests were repeated 10 times for each example and comparative example, and the average number of screen residues was recorded for each example and comparative example. The compressive strength of the cement powder clean slurry in each example and each comparative example is tested after 18 days, the test is repeated for 10 times, and the average value of the compressive strength is recorded; the setting time of the cement was also recorded. The results of the above tests are reported in table 3.
TABLE 3
Through data comparison between the example 1 and the comparative examples 1-3, the primary grinding agent and the secondary grinding agent have the effect of improving the grading uniformity of cement particles for grinding aid of cement. And when the primary grinding agent and the secondary grinding agent are used in a compounding way, the effect of improving the fineness uniformity of the cement is remarkable, and the screen allowance is obviously smaller than that of a grinding aid product sold in a comparative example 3.
Secondly, through data comparison between the example 1 and the examples 2-5, the grinding aid has obvious optimization effect on the improvement of the fineness of the cement within the application range of each component in the primary grinding agent and the secondary grinding agent.
Through comparison of data between example 1 and examples 6-8, it can be seen that the screen residue of the primary grinding agent is reduced to a certain extent after the synergist is added, which indicates that the fineness of the cement is improved to a certain extent.
From the comparison of the data between example 1 and examples 9-11, it can be seen that the amount of screen residue of the cement after grinding is also reduced after the additives are incorporated into the secondary grinding aid, indicating that the addition of the additive component helps to increase the grinding of the cement by the grinding aid.
By comparing the data between example 1 and examples 12-14, it can be seen that the addition of the carboxymethyl cellulose rag also reduced the amount of screen residue of the cement after grinding, indicating that the carboxymethyl cellulose rag has a synergistic effect on the grinding aid effect of the grinding aid on the cement.
Through comparison of data between example 1 and examples 15 to 19 and between comparative example 2 and comparative example 3, it can be seen that the tertiary auxiliary grinding agent has an effect of increasing the fineness of grinding of cement, and the effect of increasing the fineness of grinding of cement is better in the manner of using the secondary addition grinding agent together with the tertiary auxiliary grinding agent.
By comparing the data of the example 1 and the examples 20-21, it can be seen that the grinding aid effect of the grinding aid can be improved by crushing the cement clinker by rolling twice and spraying a trace amount of water in the two crushing processes, so that the fineness of the cement obtained after grinding is thinner.
From the comparison of the data of examples 1 to 21 with example 22, it can be seen that the primary grinding agent after the synergist is added, the secondary grinding agent after the additive and the carboxymethyl cellulose rag are added, the auxiliary grinding agent is added three times after the coarse grinding, and the water mist is sprayed in the rolling process, which is the most effective for improving the fineness of the cement.
By comparing the retardation time data between the examples 1 to 22 and the comparative examples 2, 3 and 4, it can be seen that the primary grinding agent added in the application has an obvious effect of improving the retardation performance of the cement.
And according to actual energy consumption measurement, the total energy consumption in the examples 1-22 is averagely 22kwh/t, the energy consumption in the comparative example 4 is 26kwh/t, and the examples 1-22 are better than the comparative example 4 in terms of the particle size distribution uniformity and the cement fineness of the cement, so that the grinding aid and the grinding method have lower energy consumption and better grinding effect.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The grinding aid is characterized by comprising a primary grinding agent and a secondary additive grinding agent in a weight ratio of (2-3) to 1, wherein the primary grinding agent comprises the following raw materials in parts by weight:
the secondary addition grinding agent comprises the following raw materials in parts by weight:
2. a grinding aid according to claim 1 wherein: the raw materials of the primary grinding agent are also added with 1-3 parts by weight of synergist, and the synergist is a mixture of sodium carbonate and sodium bicarbonate with the weight ratio of 1: 1-2.
3. A grinding aid according to claim 1 wherein: the secondary addition grinding agent is also added with 1-2 parts of additive by weight, and the additive comprises glucose and sorbitol in a weight ratio of 1: 0.5-1.
4. A method of cement grinding using a grinding aid of any one of claims 1 to 3, wherein: the method comprises the following steps:
step S1: mixing cement clinker with a primary grinding agent, and then rolling and crushing to obtain a pre-crushed material;
step S2: mixing the pre-crushed material and a secondary grinding agent, and then sequentially carrying out coarse grinding and fine grinding to obtain mixed powder;
step S3: and selecting the mixed powder, outputting and storing the qualified powder, and returning the unqualified powder to the fine grinding step for continuous grinding.
5. A method of cement grinding according to claim 1, characterized in that: the rolling in the step S1 specifically comprises two rolling operations, wherein the raw material after the first rolling operation is sprayed between the two rolling operations, and the spraying amount is 0.5-0.6% of the mass of the cement clinker.
6. A method of cement grinding according to claim 1, characterized in that: 0.5-1 part of carboxymethyl cellulose rag is also added into the secondary grinding agent, and the carboxymethyl cellulose rag is soaked in ice water until the water absorption is saturated.
7. A method of cement grinding according to claim 1, characterized in that: in the step S2, before the fine grinding operation, a third auxiliary grinding agent is added to the coarse ground product, where the third auxiliary grinding agent includes the following components in parts by weight:
30-38 parts of modified alcohol amine mother liquor;
10-12 parts of deionized water at the temperature of 1-5 ℃;
and 2-2 parts of an alkali-resistant penetrating agent OEP-701.
8. A method of cement grinding according to claim 7, characterized in that: the preparation method of the modified alcohol amine mother liquor comprises the following steps:
step 1: completely dissolving sodium chloroacetate in deionized water at 50-80 ℃ to prepare a base fluid;
step 2: dropwise adding a sodium hydroxide aqueous solution with the mass concentration of 32% into the prepared matrix to maintain the pH value of the solution system at 11-12;
and step 3: dropping diethanolamine into the solution system obtained in the step 2 at the temperature of 60 ℃, and stirring at the constant temperature for 1-2h to obtain a modified alcohol amine mother liquor; wherein the molar ratio of the sodium chloroacetate to the deionized water to the aqueous solution of sodium hydroxide to the diethanolamine is 1:5:1: 1.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114804690A (en) * | 2022-04-23 | 2022-07-29 | 杭州砺品科技有限公司 | Slag mineral powder grinding aid and grinding method of slag mineral powder |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6005057A (en) * | 1996-02-02 | 1999-12-21 | Mbt Holding Ag | Cement grinding aid |
| CN101224954A (en) * | 2007-01-17 | 2008-07-23 | 张括嘉 | Highly effective cement grinding aid |
| CN103449752A (en) * | 2013-08-16 | 2013-12-18 | 辽宁鑫隆科技有限公司 | Polyether composite cement grinding aid |
| CN105236809A (en) * | 2015-07-29 | 2016-01-13 | 重庆市南川区海峰水泥有限公司 | Cement grinding aid |
| CN105271913A (en) * | 2015-11-19 | 2016-01-27 | 杭州立平工贸有限公司 | Cement grinding aid and preparation method thereof |
| CN110204449A (en) * | 2019-05-14 | 2019-09-06 | 辽宁天宝华瑞建材有限公司 | A kind of preparation method of modified triethanolamine |
-
2021
- 2021-04-16 CN CN202110411379.5A patent/CN113105154B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6005057A (en) * | 1996-02-02 | 1999-12-21 | Mbt Holding Ag | Cement grinding aid |
| CN101224954A (en) * | 2007-01-17 | 2008-07-23 | 张括嘉 | Highly effective cement grinding aid |
| CN103449752A (en) * | 2013-08-16 | 2013-12-18 | 辽宁鑫隆科技有限公司 | Polyether composite cement grinding aid |
| CN105236809A (en) * | 2015-07-29 | 2016-01-13 | 重庆市南川区海峰水泥有限公司 | Cement grinding aid |
| CN105271913A (en) * | 2015-11-19 | 2016-01-27 | 杭州立平工贸有限公司 | Cement grinding aid and preparation method thereof |
| CN110204449A (en) * | 2019-05-14 | 2019-09-06 | 辽宁天宝华瑞建材有限公司 | A kind of preparation method of modified triethanolamine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114804690A (en) * | 2022-04-23 | 2022-07-29 | 杭州砺品科技有限公司 | Slag mineral powder grinding aid and grinding method of slag mineral powder |
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