CN113264696A - Method for improving production of high-performance green cement by double-doping grinding aid and mineralized material - Google Patents
Method for improving production of high-performance green cement by double-doping grinding aid and mineralized material Download PDFInfo
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- CN113264696A CN113264696A CN202110554523.0A CN202110554523A CN113264696A CN 113264696 A CN113264696 A CN 113264696A CN 202110554523 A CN202110554523 A CN 202110554523A CN 113264696 A CN113264696 A CN 113264696A
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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
- C04B7/24—Cements from oil shales, residues or waste other than slag
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention discloses a method for improving the production of high-performance green cement by double-doping grinding aid and mineralized material, which comprises the following steps: s1, preparing raw materials, namely preparing sufficient clinker, mineralized materials, limestone, slag micro powder, desulfurized gypsum and grinding aids; s2, testing by a reference group, wherein the cement comprises the following components in parts by weight: preparing four thousand and five hundred grams of clinker, one hundred and seventy five grams of limestone, five hundred grams of superfine slag powder and three hundred and twenty five grams of desulfurized gypsum, and collecting grinding time, water consumption, initial setting, final setting, fineness, a specific table, sulfur trioxide, ignition loss, net slurry fluidity, folding resistance, compression resistance and hexavalent chromium data, wherein the data number is A1. The invention has the beneficial effects that: the clinker standard blank is reduced, the strength is improved, the water consumption for standard consistency is reduced, the same high value ratio of hexavalent chromium is reduced, the content of hexavalent chromium in cement can be effectively eliminated, and a chromium removing agent does not need to be purchased separately.
Description
Technical Field
The invention relates to the technical field of cement, in particular to an improvement method for producing high-performance green cement by double-doping grinding aid and mineralized material.
Background
The cement production capacity of China is the first in the world for many years, and the quality and the manufacturing technology aspects are no longer behind any country in the world. The national standard requirement of cement is only the requirement on the basic performance of the cement, but not the standard of high-performance green cement, and the cement is used as a main cementing material of concrete, so that the cement ratio is greatly improved, the cement particle grading is unreasonable, the concrete temperature rise is large, the early cracking phenomenon is caused, the durability is reduced, the water demand is increased in the construction process, the production cost of the cement enterprise is increased, the resource is wasted, the clinker ratio is high, the clinker of the cement enterprise is short, and the practical use is inconvenient.
Disclosure of Invention
The invention mainly aims to provide an improvement method for producing high-performance green cement by double-doping grinding aid and mineralized material, which can effectively solve the problems of resource waste, high clinker ratio, short clinker of cement enterprises and inconvenient actual use in the background technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
a method for improving the production of high-performance green cement by double-doping grinding aid and mineralized materials comprises the following steps:
s1, preparing raw materials, namely preparing sufficient clinker, mineralized materials, limestone, slag micro powder, desulfurized gypsum and grinding aids;
s2, testing by a reference group, wherein the cement comprises the following components in parts by weight: preparing four thousand and five hundred grams of clinker, one hundred and seventy five grams of limestone, five hundred grams of superfine slag powder and three hundred and twenty five grams of desulfurized gypsum, and collecting grinding time, water consumption, initial setting, final setting, fineness, a specific table, sulfur trioxide, ignition loss, net slurry fluidity, folding resistance, compression resistance and hexavalent chromium data, wherein the data number is A1;
s3 and a grinding aid single-doping test, wherein the cement comprises the following components in parts by weight: preparing four thousand, two hundred and fifty grams of clinker, four hundred, twenty five grams of limestone, five hundred grams of slag micro powder, three hundred, twenty five grams of desulfurized gypsum and one or five grams of grinding aid, and collecting data of grinding time, water consumption, initial setting, final setting, fineness, a ratio table, sulfur trioxide, loss on ignition, net slurry fluidity, folding resistance, compression resistance and hexavalent chromium, wherein the data number is A2;
s4, a grinding aid and a mineralized material are doped in a double-mixing mode, and the cement comprises the following components in parts by weight: preparing four kilograms of clinker, six hundred and seventy five grams of limestone, five hundred and twenty five grams of slag micro powder, three hundred and twenty five grams of desulfurized gypsum, one hundred and five grams of grinding aid and twenty five grams of mineralized material, and collecting data of grinding time, water consumption, initial setting, final setting, fineness, ratio table, sulfur trioxide, loss on ignition, net slurry fluidity, folding resistance, compression resistance and hexavalent chromium, wherein the data number is A3;
and S5, comparing the collected data in A1, A2 and A3.
Preferably, the slag micro powder is doped externally, and the slag micro powder and other raw materials are ground together.
Preferably, the flexural and compressive data are collected after three days of testing.
Preferably, the net slurry fluidity captures an initial fluidity and a one hour post fluidity.
Preferably, the cement grinding temperature is less than one hundred twenty degrees.
Wherein the milling time in Al, A2 and A3 is 23, 23 and 23 respectively, the water consumption is 26.4, 25.6 and 25.4 respectively, the initial setting is 177, 154 and 170 respectively, the final setting is 212, 192 and 202 respectively, the fineness is 2.6, 2.6 and 2.4 respectively, the ratio table is 392, 395 and 401 respectively, the sulfur trioxide is 2.94, 2.86 and 2.9 respectively, the loss on ignition is 4.69, 3.38 and 6.73 respectively, the initial fluidity of the clean slurry is 230, 240 and 225 respectively, the fluidity after one hour of the clean slurry is 160, 170 and 155 respectively, the fracture resistance is 6.1, 6.4 and 6.3 respectively, the compression resistance is 24.2, 26.4 and 27.5 respectively, and the hexavalent chromium is 9.67, 11.17 and 9.09 respectively.
Compared with the prior art, the invention has the following beneficial effects: according to the analysis of the result of the small grinding test, on the basis of 5% reduction of clinker, the strength in three days is improved by 2.2MPa, the water consumption of standard consistency is reduced by 0.8, the change of other properties is not large, when grinding aid and mineralized material are mixed, the clinker is reduced by 10% to the standard blank, the strength in three days is improved by 3.3MPa, the water consumption of standard consistency is reduced by 1.0, the ratio of the hexavalent chromium to the height is reduced by 2.08ppm, because of the small grinding test, uniform time grinding is adopted, if the cement is ground in a large grinding mode, under the premise of ensuring the corresponding strength, the specific area of the cement is controlled to be relatively lower, the condition of large grinding is better, the water requirement of the cement can be further reduced, the adaptability and the compatibility of the cement with low water requirement and a water reducing agent can be better, the hexavalent chromium of the A2 cement exceeds the standard, a plurality of mixed materials are brought in, and the A3 cement sample is added with the mineralized material, although the mixed material is increased by 5%, the hexavalent chromium is correspondingly reduced by 2.08ppm, compared with a blank sample, the content of hexavalent chromium in the cement is reduced by 0.58ppm, the content of hexavalent chromium in the cement can be effectively eliminated, a chromium removing agent does not need to be purchased separately, the fund is saved, the clinker proportion is reduced by 10-15%, and the current situation of clinker tension of a cement enterprise is effectively relieved.
Drawings
FIG. 1 is a schematic flow diagram of an enhanced method for producing high performance green cement by double-doping grinding aid and mineralized material according to the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Example 1
A method for improving the production of high-performance green cement by double-doping grinding aid and mineralized materials comprises the following steps:
s1, preparing raw materials, namely preparing sufficient clinker, mineralized materials, limestone, slag micro powder, desulfurized gypsum and grinding aids;
s2, testing by a reference group, wherein the cement comprises the following components in parts by weight: preparing four thousand and five hundred grams of clinker, one hundred and seventy five grams of limestone, five hundred grams of superfine slag powder and three hundred and twenty five grams of desulfurized gypsum, and collecting grinding time, water consumption, initial setting, final setting, fineness, a specific table, sulfur trioxide, ignition loss, net slurry fluidity, folding resistance, compression resistance and hexavalent chromium data, wherein the data number is A1;
s3 and a grinding aid single-doping test, wherein the cement comprises the following components in parts by weight: preparing four thousand, two hundred and fifty grams of clinker, four hundred, twenty five grams of limestone, five hundred grams of slag micro powder, three hundred, twenty five grams of desulfurized gypsum and one or five grams of grinding aid, and collecting data of grinding time, water consumption, initial setting, final setting, fineness, a ratio table, sulfur trioxide, loss on ignition, net slurry fluidity, folding resistance, compression resistance and hexavalent chromium, wherein the data number is A2;
s4, a grinding aid and a mineralized material are doped in a double-mixing mode, and the cement comprises the following components in parts by weight: preparing four kilograms of clinker, six hundred and seventy five grams of limestone, five hundred and twenty five grams of slag micro powder, three hundred and twenty five grams of desulfurized gypsum, one hundred and five grams of grinding aid and twenty five grams of mineralized material, and collecting data of grinding time, water consumption, initial setting, final setting, fineness, ratio table, sulfur trioxide, loss on ignition, net slurry fluidity, folding resistance, compression resistance and hexavalent chromium, wherein the data number is A3;
and S5, comparing the collected data in A1, A2 and A3.
In this embodiment, the fine slag powder is doped externally, and the fine slag powder and other raw materials are milled together.
In this example, the flexural and compressive data were collected after three days of testing.
In this example, the net slurry fluidity captures the initial fluidity and the one hour post fluidity.
In this embodiment, the cement mill-out temperature is less than one hundred twenty degrees.
Wherein the grinding time in A1, A2 and A3 is 23, 23 and 23 respectively, the water consumption is 26.4, 25.6 and 25.4 respectively, the initial setting is 177, 154 and 170 respectively, the final setting is 212, 192 and 202 respectively, the fineness is 2.6, 2.6 and 2.4 respectively, the ratio table is 392, 395 and 401 respectively, the sulfur trioxide is 2.94, 2.86 and 2.9 respectively, the loss on ignition is 4.69, 3.38 and 6.73 respectively, the initial fluidity of the clean slurry is 230, 240 and 225 respectively, the fluidity after one hour of the clean slurry is 160, 170 and 155 respectively, the fracture resistance is 6.1, 6.4 and 6.3 respectively, the compression resistance is 24.2, 26.4 and 27.5 respectively, and the hexavalent chromium is 9.67, 11.17 and 9.09 respectively.
It should be noted that, the invention is a method for improving the production of high-performance green cement by double-doping grinding aid and mineralized material, the result analysis of this small grinding test shows that on the basis of 5% reduction of clinker, 2.2MPa of three-day strength is also improved, the water consumption of standard consistency is reduced by 0.8, other performance changes are not large, when the grinding aid and mineralized material are double-doped, the clinker is reduced by 10% to the standard blank, and the three-day strength is also improved by 3.3MPa, the water consumption of standard consistency is reduced by 1.0, the same height ratio of hexavalent chromium is reduced by 2.08ppm, because of the small grinding test, uniform time grinding is adopted, if the cement is ground in large size, on the premise of ensuring corresponding strength, the specific area of the cement is controlled to be relatively low, the grinding condition of large size is better, the water consumption of the cement can be further reduced, the adaptability and compatibility of the cement with water reducing agent in low water demand can be better, the hexavalent chromium of A2 cement can exceed the standard, the method is carried out by a plurality of mixed materials, and the A3 cement sample is mixed with the mineralized materials, so that although the mixed materials are increased by 5%, the hexavalent chromium is correspondingly reduced by 2.08ppm and 0.58ppm compared with a blank sample, the content of the hexavalent chromium in the cement can be effectively eliminated, a chromium removing agent does not need to be purchased independently, the fund is saved, the clinker proportion is reduced by 10-15%, and the current situation of clinker tension of a cement enterprise is effectively relieved.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (5)
1. The method for improving the production of high-performance green cement by double-doping grinding aid and mineral aggregate is characterized by comprising the following steps:
s1, preparing raw materials, namely preparing sufficient clinker, mineralized materials, limestone, slag micro powder, desulfurized gypsum and grinding aids;
s2, testing by a reference group, wherein the cement comprises the following components in parts by weight: preparing four thousand and five hundred grams of clinker, one hundred and seventy five grams of limestone, five hundred grams of superfine slag powder and three hundred and twenty five grams of desulfurized gypsum, and collecting grinding time, water consumption, initial setting, final setting, fineness, a specific table, sulfur trioxide, ignition loss, net slurry fluidity, folding resistance, compression resistance and hexavalent chromium data, wherein the data number is A1;
s3 and a grinding aid single-doping test, wherein the cement comprises the following components in parts by weight: preparing four thousand, two hundred and fifty grams of clinker, four hundred, twenty five grams of limestone, five hundred grams of slag micro powder, three hundred, twenty five grams of desulfurized gypsum and one or five grams of grinding aid, and collecting data of grinding time, water consumption, initial setting, final setting, fineness, a ratio table, sulfur trioxide, loss on ignition, net slurry fluidity, folding resistance, compression resistance and hexavalent chromium, wherein the data number is A2;
s4, a grinding aid and a mineralized material are doped in a double-mixing mode, and the cement comprises the following components in parts by weight: preparing four kilograms of clinker, six hundred and seventy five grams of limestone, five hundred and twenty five grams of slag micro powder, three hundred and twenty five grams of desulfurized gypsum, one hundred and five grams of grinding aid and twenty five grams of mineralized material, and collecting data of grinding time, water consumption, initial setting, final setting, fineness, ratio table, sulfur trioxide, loss on ignition, net slurry fluidity, folding resistance, compression resistance and hexavalent chromium, wherein the data number is A3;
and S5, comparing the collected data in A1, A2 and A3.
2. The method for improving the production of high-performance green cement by double-doping grinding aid and mineralized materials according to claim 1, wherein the slag micropowder is doped externally and is milled together with other raw materials.
3. The improved method of producing high performance green cement with a double blend of grinding aid and mineral aggregate as claimed in claim 1 wherein said flexural and compressive data is collected after three days of testing.
4. The improved method of dual grinding aid and mineralized material blend production for high performance green cement according to claim 1, wherein the net slurry fluidity captures initial fluidity and one hour post fluidity.
5. The improved process for producing high performance green cement with double grinding aid and mineralized material according to claim 1, wherein the cement grinding temperature is less than one hundred twenty degrees.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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