CN110818292A - Production of ordinary portland cement by using vanadium-titanium slag instead of slag - Google Patents
Production of ordinary portland cement by using vanadium-titanium slag instead of slag Download PDFInfo
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- CN110818292A CN110818292A CN201910975897.2A CN201910975897A CN110818292A CN 110818292 A CN110818292 A CN 110818292A CN 201910975897 A CN201910975897 A CN 201910975897A CN 110818292 A CN110818292 A CN 110818292A
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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
- C04B7/28—Cements from oil shales, residues or waste other than slag from combustion residues, e.g. ashes or slags from waste incineration
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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
- C04B7/02—Portland cement
- C04B7/04—Portland cement using raw materials containing gypsum, i.e. processes of the Mueller-Kuehne type
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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
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/17—Mixtures thereof with other inorganic cementitious materials or other activators with calcium oxide containing activators
- C04B7/19—Portland cements
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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
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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
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a method for producing ordinary portland cement by using vanadium-titanium slag instead of slag, and particularly relates to the technical field of preparation of building materials, wherein the ordinary portland cement is mainly prepared from the following main materials: clinker, gypsum, limestone, slag, coal-fired slag and vanadium-titanium slag. According to the invention, the low-chlorine gypsum is used for replacing part of desulfurized gypsum to balance chloride ions of cement, and the vanadium-titanium slag is used for replacing part of slag, so that the vanadium-titanium slag can be reasonably utilized, the cement quality is ensured, the cement batching cost is reduced, and the steel-bearing waste discharge pressure is relieved. Through dozens of groups of small mill tests and three months of large mill production, 50 percent of vanadium-titanium slag can replace slag to produce ordinary portland cement, the produced cement has qualified strength, chloride ions meet the national standard, the cement performance is not changed, and the batching cost is greatly reduced.
Description
Technical Field
The invention relates to the technical field of building material preparation, in particular to a method for producing ordinary portland cement by using vanadium-titanium slag instead of slag.
Background
Most of the existing cement mixed materials in the north use slag, the slag is an industrial byproduct produced by common iron and steel enterprises, and in recent years, the iron and steel enterprises are subjected to national structure adjustment and environmental protection pressure to stop production and limit production, so that the slag yield is limited, the price rapidly rises, the original price of 45 yuan/ton rises to 150 yuan/ton, and the cement batching cost also greatly rises. Under the condition, vanadium-titanium slag is used for replacing partial slag, so that the cement production cost is greatly reduced under the condition of ensuring that the strength and the performance of the cement are not changed.
The vanadium-titanium slag is an industrial byproduct generated by special vanadium-titanium steel enterprises, compared with common slag, the vanadium-titanium slag has lower activity (about 75-80%) in 28 days and higher chloride ion content (0.1-0.4%), after the vanadium-titanium slag is doped in cement in a certain proportion, firstly, the chloride ions of the cement are likely to exceed the national standard, and simultaneously, the 28-day strength of the cement is reduced more, so that the cement cannot meet the requirements of users, so that the vanadium-titanium slag cannot be fully and effectively utilized in the past decades and almost completely discharged, and larger waste slag mountain is formed around the Chengde steel company, occupies land and destroys the environment.
Therefore, the invention of vanadium-titanium slag instead of slag is necessary for producing ordinary portland cement.
Disclosure of Invention
In order to overcome the defects in the prior art, the embodiment of the invention provides a method for producing ordinary portland cement by replacing slag with vanadium-titanium slag, wherein chloride ions of the cement are balanced by using low-chlorine gypsum to replace part of desulfurized gypsum, the vanadium-titanium slag is reasonably utilized, the slag is partially replaced, the cement quality is ensured, the cement production cost is reduced, and the waste discharge pressure of bearing steel is relieved. At present, 50% of vanadium-titanium slag can be stably replaced by slag, the produced strength is qualified, the performance of cement is not changed, and the chloride ions of the cement meet the national standard, so that the production cost is greatly reduced.
In order to achieve the purpose, the invention provides the following technical scheme: ordinary portland cement, including p.o42.5 and p.s.a3.25 cements, (other varieties of portland cements can also be produced) are produced by replacing part of the slag with vanadium-titanium slag, and the main materials used for the portland cement include: clinker, gypsum, limestone, slag, vanadium-titanium slag and coal-fired slag.
The preparation method of the P.S.A32.5 cement comprises the following specific operation steps:
the method comprises the following steps: purchasing clinker, gypsum, limestone, slag and vanadium-titanium slag;
step two: respectively taking materials according to a certain proportion and putting the materials into a cement mill for grinding: 48%, 45% and 44% of clinker, 4%, 5% and 6% of gypsum, 6%, 8% and 8% of limestone, 20%, 21% and 42% of slag, and 22%, 21% and 0% of vanadium-titanium slag;
step three: in the grinding process, adding a liquid grinding aid at a grinding belt according to a certain proportion to produce P.S.A32.5 cement;
step four: the P.S.A32.5 cement enters a cement warehouse and is taken out of the warehouse in a matching way, or is delivered out of the warehouse in bulk or in bags, and the waterproof and moistureproof work is paid attention to in the process of storage and delivery.
Preferably, in the second step, the total usage amount of the slag and the vanadium-titanium slag accounts for 42% of the total amount of the mixed materials, and the gypsum is low-chlorine gypsum.
Preferably, the grinding aid in the third step is a liquid grinding aid mainly containing triethanolamine, and the ratio of the grinding aid to the mixed material is set as grinding aid: mix = 0.035: 100.
the preparation method of another Portland cement P.O42.5 comprises the following specific operation steps:
the method comprises the following steps: purchasing clinker, gypsum, limestone, slag, coal-fired furnace slag and vanadium-titanium slag;
step two: respectively taking materials according to a certain proportion and putting the materials into a cement mill for grinding: 79%, 75% and 75% of clinker, 4%, 5% and 5.5% of gypsum, 4% and 4% of limestone, 4%, 6% and 11.5% of slag, 5%, 6% and 0% of vanadium-titanium slag, 4% and 4% of coal-fired furnace slag;
step three: in the grinding process, adding a liquid grinding aid at a grinding belt according to a certain proportion to produce P.O42.5 cement;
step four: the P.O42.5 cement enters a cement warehouse, is matched with the cement to be delivered out of the warehouse, or is delivered out of the warehouse in bulk or in bags, and is paid attention to the waterproof and moistureproof work in the storage and delivery processes.
Preferably, the total usage amount of the slag and the vanadium-titanium slag in the second step accounts for 9% -12% of the total amount of the mixed material, the gypsum is low-chlorine gypsum, the chloride ion is less than 0.2%, the main component of the grinding aid in the third step is triethanolamine, and the ratio of the grinding aid to the mixed material is set as the grinding aid: mix = 0.035: 100.
the invention has the technical effects and advantages that:
1. by using the low-chlorine gypsum to replace part of desulfurized gypsum to balance chloride ions of cement, the vanadium-titanium slag is reasonably utilized and partially replaces slag, so that the production cost is reduced while the cement quality is ensured, the environmental pressure is relieved, 50% of vanadium-titanium slag can replace slag, the chloride ions meet the national standard, the strength is qualified, the cement performance is not changed at all, and the production cost is greatly reduced;
2. the method has the advantages that the vanadium-titanium slag is fully utilized to produce the ordinary portland cement, the production cost is reduced, meanwhile, the phenomenon that steel bearing slag piles up and occupies land is solved, reasonable utilization of resources is facilitated, environmental burden is relieved, grinding aids are added in cement processing, cement grindability is facilitated to be improved, and cement yield is improved.
Detailed Description
The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention provides a method for producing ordinary portland cement by using vanadium-titanium slag instead of slag, which comprises P.S. A32.5 and P.O42.5 portland cement, wherein the portland cement uses main materials comprising: clinker, gypsum, limestone, coal-fired furnace slag, slag and vanadium-titanium slag;
the preparation method of the P.S.A32.5 cement comprises the following specific operation steps:
the method comprises the following steps: purchasing clinker, gypsum, limestone, slag and vanadium-titanium slag;
step two: taking the raw materials according to a certain proportion, mixing the raw materials according to 48% of clinker, 4% of gypsum, 6% of limestone, 20% of slag and 22% of vanadium-titanium slag, and grinding, wherein the total usage amount of the slag and the vanadium-titanium slag accounts for 42% of the total amount of the mixed materials, and the gypsum is low-chlorine gypsum;
step three: adding a liquid grinding aid mainly comprising triethanolamine in the grinding process, wherein the adding proportion is 0.035-0.045%, and controlling the cement ratio table to be 400-430 to prepare P.S.A32.5 cement;
step four: the P.S.A32.5 cement enters a cement warehouse and is taken out of the warehouse in a matching way, or is delivered out of the warehouse in bulk or in bags, and the waterproof and moistureproof work is paid attention to in the process of storage and delivery.
The preparation method of the P.O42.5 cement comprises the following specific operation steps:
the method comprises the following steps: purchasing clinker, gypsum, limestone, slag, vanadium-titanium slag and furnace slag;
step two: taking the raw materials according to the proportion, mixing and grinding 79% of clinker, 4% of gypsum, 4% of limestone, 3% of slag, 4% of vanadium-titanium slag and 6% of coal-fired slag, wherein the gypsum is low-chlorine gypsum;
step three: adding a liquid grinding aid mainly comprising triethanolamine in the grinding process, wherein the adding proportion is 0.035-0.045%, and controlling the cement ratio table to be 370-390 to prepare P.O42.5 cement;
step four: the P.O42.5 cement enters a cement warehouse, is matched with the cement to be delivered out of the warehouse, or is delivered out of the warehouse in bulk or in bags, and is paid attention to the waterproof and moistureproof work in the storage and delivery processes.
The P.S.A32.5 cement and the P.O42.5 cement prepared in the embodiment have good performance, the compressive strength of the P.S.A32.5 in three days is 16.2 MPa, and the compressive strength of the P.S.A32.5 in 28 days is 40.2 MPa; P.O42.5 compressive strength of 29.0 MPa in three days and 56.8 MPa in 28 days, and all chloride ions meet the national standard and can meet the requirements of users.
Example 2:
the invention provides a method for producing ordinary portland cement by using vanadium-titanium slag instead of slag, which comprises P.S. A32.5 and P.O42.5 portland cement, wherein the portland cement uses main materials comprising: clinker, gypsum, limestone, coal-fired furnace slag, slag and vanadium-titanium slag;
the preparation method of the P.S.A32.5 cement comprises the following specific operation steps:
the method comprises the following steps: purchasing clinker, gypsum, limestone, slag and vanadium-titanium slag;
step two: taking the raw materials according to a certain proportion, mixing 45% of clinker, 5% of gypsum, 8% of limestone, 21% of slag and 21% of vanadium-titanium slag into a mill, wherein the total usage amount of the slag and the vanadium-titanium slag accounts for 42% of the total amount of the mixed materials, and the gypsum is low chlorine gypsum;
step three: adding a liquid grinding aid mainly comprising triethanolamine in the grinding process, wherein the adding proportion is 0.035-0.045%, and the cement ratio is controlled to be 400-430, so as to prepare P.S.A32.5 cement;
step four: the P.S.A32.5 cement enters a cement warehouse and is taken out of the warehouse in a matching way, or is delivered out of the warehouse in bulk or in bags, and the waterproof and moistureproof work is paid attention to in the process of storage and delivery.
The preparation method of the P.O42.5 cement comprises the following specific operation steps:
the method comprises the following steps: purchasing clinker, gypsum, limestone, slag, vanadium-titanium slag and furnace slag;
step two: taking the raw materials according to the proportion, mixing the raw materials according to 75% of clinker, 5% of gypsum, 4% of limestone, 6% of slag, 6% of vanadium-titanium slag and 4% of slag, and grinding, wherein the gypsum is low-chlorine gypsum;
step three: adding a liquid grinding aid mainly comprising triethanolamine in the grinding process, wherein the adding proportion is 0.035-0.045%, and the cement ratio table is controlled at 370-390 to prepare P.O42.5 cement;
step four: the P.O42.5 cement enters a cement warehouse, is matched with the cement to be delivered out of the warehouse, or is delivered out of the warehouse in bulk or in bags, and is paid attention to the waterproof and moistureproof work in the storage and delivery processes.
The P.S.A32.5 cement and the P.O42.5 cement prepared in the embodiment have good performance, the compressive strength of the P.S.A32.5 in three days is 16.5 MPa, and the compressive strength of the P.S.A32.5 in 28 days is 41 MPa; P.O42.5 compressive strength of 28.1 MPa in three days and 55.2MPa in 28 days, and all chloride ions meet the national standard and can meet the user requirements.
Example 3:
the invention provides a method for producing ordinary portland cement by using vanadium-titanium slag instead of slag, which comprises P.S. A32.5 and P.O42.5 portland cement, wherein the portland cement uses main materials comprising: clinker, gypsum, limestone, furnace slag, slag and vanadium-titanium slag;
the preparation method of the P.S.A32.5 cement comprises the following specific operation steps:
the method comprises the following steps: purchasing clinker, gypsum, limestone, slag and vanadium-titanium slag;
step two: taking the raw materials according to a certain proportion, mixing the raw materials according to 44% of clinker, 6% of gypsum, 8% of limestone and 42% of slag, and grinding the mixture, wherein the gypsum is common desulfurized gypsum;
step three: adding a liquid grinding aid mainly comprising triethanolamine in the grinding process, wherein the adding proportion is 0.035-0.045%, and the cement ratio is controlled to be 400-430, so as to prepare P.S.A32.5 cement;
step four: the P.S.A32.5 cement enters a cement warehouse and is taken out of the warehouse in a matching way, or is delivered out of the warehouse in bulk or in bags, and the waterproof and moistureproof work is paid attention to in the process of storage and delivery.
The preparation method of the P.O42.5 cement comprises the following specific operation steps:
the method comprises the following steps: purchasing clinker, gypsum, limestone, slag, vanadium-titanium slag and furnace slag;
step two: taking the raw materials according to the proportion, mixing the raw materials according to 75% of clinker, 5.5% of gypsum, 4% of limestone, 11.5% of slag and 4% of slag, and grinding the mixture, wherein the gypsum is common desulfurized gypsum;
step three: adding a liquid grinding aid mainly comprising triethanolamine in the grinding process, wherein the adding proportion is 0.035-0.045%, and the cement ratio table is controlled at 370-390 to prepare P.O42.5 cement;
step four: the P.O42.5 cement enters a cement warehouse, is matched with the cement to be delivered out of the warehouse, or is delivered out of the warehouse in bulk or in bags, and is paid attention to the waterproof and moistureproof work in the storage and delivery processes.
The P.S.A32.5 cement and the P.O42.5 cement prepared in the embodiment have good performance, the compressive strength of the P.S.A32.5 in three days is 16.4 MPa, and the compressive strength of the P.S.A32.5 in 28 days is 46.0 MPa; P.O42.5 compressive strength of 28.3 MPa in three days and 56.4MPa in 28 days, and the chloride ion meets the national standard and can meet the user requirements.
The following table is obtained according to examples 1 to 3:
table 1 p.s.a32.5 cement test results
Table 2 p.o42.5 cement test results
It can be seen from tables 1-2 that the production processes of p.s.a32.5 cement and p.o42.5 cement are the same, but different production formulas produce cement products with different strengths, wherein the raw material proportion in example 2 is moderate, the processing process is most suitable for the production of ordinary portland cement by replacing slag with vanadium-titanium slag, compared with the comparative example group, the use of low-chlorine gypsum to replace part of desulfurized gypsum to balance the chloride ions of cement enables the vanadium-titanium slag to replace the slag to be reasonably utilized, on the premise of ensuring the cement quality, the batching cost is reduced, the waste discharge pressure of steel mills is relieved, 50% of vanadium-titanium slag can be replaced in the production processes of PSA32.5 and p.o42.5 cement, not only the chloride ions meet the national standard, the 28-day-rich strength is qualified, the cement performance does not change at all, but also the batching cost of PSA32.5 ton cement is reduced by 18.9 yuan, the batching cost of p.o42.5 ton cement is reduced by 4.3 yuan (145 yuan per ton, the in-place price of the vanadium-titanium slag is calculated to be 43 yuan/ton).
Finally, it should be noted that: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. The vanadium-titanium slag replaces slag to produce ordinary portland cement, which comprises P.O42.5 and P.S.A32.5 portland cement, and is characterized in that: the main materials used by the Portland cement comprise: clinker, gypsum, limestone, slag, coal-fired slag and vanadium-titanium slag.
2. The vanadium-titanium slag as set forth in claim 1 instead of slag for producing P.S. A32.5 cement, wherein: the preparation method of the P.S.A32.5 cement comprises the following specific operation steps:
the method comprises the following steps: purchasing clinker, gypsum, limestone, slag and vanadium-titanium slag;
step two: respectively taking materials according to a certain proportion and putting the materials into a cement mill for grinding: 48%, 45% and 44% of clinker, 4%, 5% and 6% of gypsum, 6%, 8% and 8% of limestone, 20%, 21% and 42% of slag, and 22%, 21% and 0% of vanadium-titanium slag;
step three: in the grinding process, adding a liquid grinding aid at a grinding belt according to a certain proportion to produce P.S.A32.5 cement;
step four: the P.S.A32.5 cement enters a cement warehouse and is taken out of the warehouse in a matching way, or is delivered out of the warehouse in bulk or in bags, and the waterproof and moistureproof work is paid attention to in the process of storage and delivery.
3. The production of portland cement by using vanadium-titanium slag instead of slag according to claim 2, wherein: and (3) mastering the activity of the vanadium-titanium slag, wherein the activity requirement is more than 75% in 28 days, the chloride ions and the chloride ions in the vanadium-titanium slag are controlled to be less than 0.2%, and the granularity of the clinker, the gypsum, the limestone, the slag and the vanadium-titanium slag in the first step is set to be 30 mm.
4. The method for producing ordinary portland cement by using vanadium-titanium slag instead of slag according to claim 2, wherein the method comprises the following steps: and in the second step, the total usage amount of the slag and the vanadium-titanium slag accounts for 42% of the total amount of the mixed materials, the gypsum is low-chlorine gypsum, and the chloride ion is less than 0.2%.
5. The method for producing ordinary portland cement by using vanadium-titanium slag instead of slag according to claim 2, wherein the method comprises the following steps: the grinding aid in the third step is mainly triethanolamine, and the ratio of the grinding aid to the mixture is as follows: mix = 0.035: 100.
6. the method for producing ordinary portland cement by using vanadium-titanium slag instead of slag according to claim 2, wherein the method comprises the following steps: the specific surface area is controlled to be 380-420, the screen residue of a 80-micron square-hole screen is controlled to be 0.5-1.0 percent, and the screen residue of a 45-micron square-hole screen is controlled to be 6-10 percent.
7. The method for producing ordinary portland cement by using vanadium-titanium slag instead of slag according to claim 1, wherein the method comprises the following steps: the preparation method of the P.O42.5 cement comprises the following specific operation steps:
the method comprises the following steps: purchasing clinker, gypsum, limestone, slag, coal-fired furnace slag and vanadium-titanium slag;
step two: respectively taking materials according to a certain proportion and putting the materials into a cement mill for grinding: 79%, 75% and 75% of clinker, 4%, 5% and 5.5% of gypsum, 4% and 4% of limestone, 4%, 6% and 11.5% of slag, 5%, 6% and 0% of vanadium-titanium slag, 4% and 4% of coal-fired furnace slag;
step three: in the grinding process, adding a liquid grinding aid at a grinding belt according to a certain proportion to produce P.O42.5 cement;
step four: the P.O42.5 cement enters a cement warehouse, is matched with the cement to be delivered out of the warehouse, or is delivered out of the warehouse in bulk or in bags, and is paid attention to the waterproof and moistureproof work in the storage and delivery processes.
8. The production of portland cement by using vanadium-titanium slag instead of slag according to claim 2, wherein: and (3) mastering the activity of the vanadium-titanium slag, wherein the activity requirement is more than 75% in 28 days, the chloride ions and the chloride ions in the vanadium-titanium slag are controlled to be less than 0.2%, and the granularity of the clinker, the gypsum, the limestone, the slag and the vanadium-titanium slag in the first step is set to be 30 mm.
9. The method for producing ordinary portland cement by using vanadium-titanium slag instead of slag according to claim 2, wherein the method comprises the following steps: in the second step, the total usage amount of the slag and the vanadium-titanium slag accounts for 9% -12% of the total amount of the mixed material, the gypsum is low-chlorine gypsum, and the chloride ion is less than 0.2%.
10. The method for producing ordinary portland cement by using vanadium-titanium slag instead of slag according to claim 2, wherein the method comprises the following steps: the grinding aid in the third step is mainly triethanolamine, and the ratio of the grinding aid to the mixed material is as follows: mix = 0.035: 100.
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| CN114230209A (en) * | 2021-12-21 | 2022-03-25 | 安徽阳光水泥有限公司 | Environment-friendly portland cement and preparation method thereof |
| CN117447103A (en) * | 2023-10-25 | 2024-01-26 | 南京工业大学 | Resource utilization method for coal slag of power plant |
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| US20090151604A1 (en) * | 2005-10-17 | 2009-06-18 | Hiroshi Hirao | Cement additive and cement composition |
| CN102515583A (en) * | 2011-11-28 | 2012-06-27 | 峨眉山强华特种水泥有限责任公司 | Method for producing low heat expansive cement |
| CN102515582A (en) * | 2011-11-28 | 2012-06-27 | 峨眉山强华特种水泥有限责任公司 | Low-heat micro-expansive cement |
| CN103739263A (en) * | 2013-12-27 | 2014-04-23 | 金川集团股份有限公司 | Gel material for filling worked out section by vanadium-titanium-containing slags |
| CN105439481A (en) * | 2015-11-16 | 2016-03-30 | 中国建筑材料科学研究总院 | Method for increasing content of periclase in high-magnesium moderate-heat cement clinker |
| CN108774008A (en) * | 2018-08-30 | 2018-11-09 | 泸州钢建工程材料有限公司 | A kind of cement |
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| CN114230209A (en) * | 2021-12-21 | 2022-03-25 | 安徽阳光水泥有限公司 | Environment-friendly portland cement and preparation method thereof |
| CN117447103A (en) * | 2023-10-25 | 2024-01-26 | 南京工业大学 | Resource utilization method for coal slag of power plant |
| CN117447103B (en) * | 2023-10-25 | 2024-05-10 | 南京工业大学 | Resource utilization method for coal slag of power plant |
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