CN112250327A - Forty-two-point five-common low-alkali portland cement containing sandstone and preparation method thereof - Google Patents
Forty-two-point five-common low-alkali portland cement containing sandstone and preparation method thereof Download PDFInfo
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- CN112250327A CN112250327A CN202010965589.4A CN202010965589A CN112250327A CN 112250327 A CN112250327 A CN 112250327A CN 202010965589 A CN202010965589 A CN 202010965589A CN 112250327 A CN112250327 A CN 112250327A
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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
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
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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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- 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
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
-
- 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
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/44—Burning; Melting
-
- 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
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/47—Cooling ; Waste heat management
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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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses forty-two-point five-common low-alkali portland cement containing sandstone and a preparation method thereof, wherein the cement comprises a component A and a component B; the component A comprises: portland cement clinker, slag, fluorgypsum and glass fiber; the component B comprises: sandstone, slag, fluorgypsum, high calcium limestone; wherein the portland cement clinker comprises the following raw materials in percentage by mass: 70-80% of raw limestone, 15-20% of raw sandstone and 5-10% of raw slag; the mass ratio of the component A to the component B is (75-85): (15-25); the mass ratio of the component A to the component B is (60-80): (20-40); by adopting the application of the sandstone cloud lending magnesium slag in the production of the ordinary low-alkali portland cement, the production cost of the ordinary low-alkali portland cement is effectively reduced, the free calcium oxide and alkali contents of the cement are reduced, the cement performance is optimized, and the cement construction performance is improved.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to forty-two-point five-normal low-alkali portland cement containing sandstone and a preparation method thereof.
Background
The magnesium slag is one of the common raw materials of low-alkali portland cement, and is calcined at 1250 ℃ to form part of silicate mineral CS and contain a small amount of CaF. Therefore, the magnesium slag can play a role of crystal seeds in the calcining process of the material, reduce the nucleation potential energy of crystals and promote the formation of the crystals. CaF contained in the magnesium slag also has the function of a mineralizer and can promote the formation of silicate minerals, thereby improving the easy-burning property of the raw material. The cooling of the magnesium slag is mainly natural cooling, wherein CS generates crystal form transformation in the slow cooling process to lead the magnesium slag to be pulverized, the physical form of the magnesium slag belongs to powdery solid with high content of ultrafine powder, the grindability is very good, the content of the ultrafine powder in the raw material can be obviously increased, the fineness of the raw material is improved, and the reaction activity of the raw material can also be theoretically improved.
However, in some areas of China, such as Qiang in Xinjiang, etc., magnesium slag raw materials used for producing ordinary low-alkali portland cement are generally purchased from remote areas, so that the magnesium slag has a long transport distance and high cost, and therefore, other raw materials are required to be used for replacing magnesium slag to reduce the production cost of the ordinary low-alkali portland cement.
Disclosure of Invention
The invention aims to provide forty-two-point five-common low-alkali portland cement containing sandstone and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a forty-two-point five-normal low-alkali silicate cement containing sandstone comprises a component A and a component B;
the component A comprises: portland cement clinker, slag, fluorgypsum and glass fiber;
the component B comprises: sandstone, slag, fluorgypsum, high calcium limestone;
wherein the portland cement clinker comprises the following raw materials in percentage by mass: 70-80% of raw limestone, 15-20% of raw sandstone and 5-10% of raw slag.
As a further scheme of the invention: the mass ratio of the component A to the component B is (75-85): (15-25).
As a further scheme of the invention: the mass ratio of the component A to the component B is (60-80): (20-40).
As a further scheme of the invention: the mass ratio of the component A to the component B is (50-65): (35-50).
As a further scheme of the invention: the component A comprises the following components in percentage by mass: portland cement clinker: 70-80%, slag: 10-20% and fluorgypsum: 5-10% of glass fiber: 5 to 10 percent.
As a still further scheme of the invention: the component B comprises the following components in percentage by mass: sandstone: 35-45% of furnace slag: 20-35% and fluorgypsum: 5-10% of high-calcium limestone: 15 to 25 percent.
A preparation method of forty-two-point five-common low-alkali portland cement containing sandstone comprises the following steps:
the method comprises the following steps: preparation of raw materials: grinding 70-80% of raw limestone, 15-20% of raw sandstone and 5-10% of raw slag according to mass percentage, and adding water to stir uniformly to prepare slurry;
step two: and (3) slurry dehydration: dehydrating the slurry to obtain concentrated slurry with the water content of 30-38%, and then dehydrating the concentrated slurry for the second time by using a vacuum suction filter to obtain a filter cake with the water content of 15-20%;
step three: drying and crushing: drying and crushing the filter cake by using a drying crusher to obtain raw material powder with the water content of 1-4%;
step four: firing clinker: preheating and decomposing raw material powder, feeding the raw material powder into a burner and sintering the raw material powder into silicate cement clinker, wherein the sintering temperature is 1250-1500 ℃;
step five: fast cooling of clinker: rapidly cooling the portland cement clinker by using a cooling machine;
step six: grinding the cooled portland cement clinker, the slag, the fluorgypsum and the glass fiber to obtain a component A;
step seven: grinding sandstone, furnace slag, fluorgypsum and high-calcium limestone to obtain a component B;
step eight: and uniformly mixing the component A and the component B to obtain the forty-two-point five-normal low-alkali portland cement containing sandstone.
Compared with the prior art, the invention has the beneficial effects that:
1. by adopting the application of the sandstone cloud lending magnesium slag in the production of the ordinary low-alkali portland cement, the production cost of the ordinary low-alkali portland cement is effectively reduced, the free calcium oxide and alkali contents of the cement are reduced, the cement performance is optimized, and the cement construction performance is improved.
2. The sandstone adopted by the invention belongs to mine stripping waste, solves the problem of environmental pollution caused by waste slag, changes waste into valuable, and has important significance for promoting environmental protection treatment.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, 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.
A forty-two-point five-normal low-alkali silicate cement containing sandstone comprises a component A and a component B;
the component A comprises: portland cement clinker, slag, fluorgypsum and glass fiber;
the component B comprises: sandstone, slag, fluorgypsum, high calcium limestone;
wherein the portland cement clinker comprises the following raw materials in percentage by mass: 70-80% of raw limestone, 15-20% of raw sandstone and 5-10% of raw slag.
The mass ratio of the component A to the component B is (75-85): (15-25).
The mass ratio of the component A to the component B is (60-80): (20-40).
The mass ratio of the component A to the component B is (50-65): (35-50).
The component A comprises the following components in percentage by mass: portland cement clinker: 70-80%, slag: 10-20% and fluorgypsum: 5-10% of glass fiber: 5 to 10 percent.
The component B comprises the following components in percentage by mass: sandstone: 35-45% of furnace slag: 20-35% and fluorgypsum: 5-10% of high-calcium limestone: 15 to 25 percent.
A preparation method of forty-two-point five-common low-alkali portland cement containing sandstone comprises the following steps:
the method comprises the following steps: preparation of raw materials: grinding 70-80% of raw limestone, 15-20% of raw sandstone and 5-10% of raw slag according to mass percentage, and adding water to stir uniformly to prepare slurry;
step two: and (3) slurry dehydration: dehydrating the slurry to obtain concentrated slurry with the water content of 30-38%, and then dehydrating the concentrated slurry for the second time by using a vacuum suction filter to obtain a filter cake with the water content of 15-20%;
step three: drying and crushing: drying and crushing the filter cake by using a drying crusher to obtain raw material powder with the water content of 1-4%;
step four: firing clinker: preheating and decomposing raw material powder, feeding the raw material powder into a burner and sintering the raw material powder into silicate cement clinker, wherein the sintering temperature is 1250-1500 ℃;
step five: fast cooling of clinker: rapidly cooling the portland cement clinker by using a cooling machine;
step six: grinding the cooled portland cement clinker, the slag, the fluorgypsum and the glass fiber to obtain a component A;
step seven: grinding sandstone, furnace slag, fluorgypsum and high-calcium limestone to obtain a component B;
step eight: and uniformly mixing the component A and the component B to obtain the forty-two-point five-normal low-alkali portland cement containing sandstone.
Example 1:
the method comprises the following steps: preparation of raw materials: grinding 75% of raw limestone, 18% of raw sandstone and 7% of raw slag according to the mass percentage, and adding water to stir uniformly to prepare slurry;
step two: and (3) slurry dehydration: dehydrating the slurry to obtain concentrated slurry with the water content of 30-38%, and then dehydrating the concentrated slurry for the second time by using a vacuum suction filter to obtain a filter cake with the water content of 15-20%;
step three: drying and crushing: drying and crushing the filter cake by using a drying crusher to obtain raw material powder with the water content of 1-4%;
step four: firing clinker: preheating and decomposing raw material powder, feeding the raw material powder into a burner and sintering the raw material powder into silicate cement clinker, wherein the sintering temperature is 1250-1500 ℃;
step five: fast cooling of clinker: rapidly cooling the portland cement clinker by using a cooling machine;
step six: and (3) cooling the portland cement clinker, the slag, the fluorgypsum and the glass fiber according to the weight ratio of 75: 13: 6: 6, mixing and grinding to obtain a component A;
step seven: sandstone, slag, fluorgypsum and high-calcium limestone are mixed according to the weight ratio of 35: 35: 8: 22, grinding the mixture after mixing to obtain a component B;
step eight: and (2) mixing the following components in percentage by mass: 18 and B components are uniformly mixed to obtain the forty-two-point five-normal low-alkali portland cement containing sandstone.
The strength of the cement is tested according to GB175-2007 and TB/T3275-2018 standards, and the test result shows that: the strength of the forty-two-point five-common low-alkali portland cement containing sandstone is 32.7MPa in 3 days, the strength of the cement reaches 63.4MPa in 28 days, and meanwhile, the content of free calcium oxide in the cement is less than or equal to 1.0 percent, the content of alkali is less than or equal to 0.6 percent, and the content of chloride ions is less than or equal to 0.06 percent, which all meet the standard requirements.
Example 2:
the method comprises the following steps: preparation of raw materials: grinding 72% of raw limestone, 19% of raw sandstone and 9% of raw slag according to the mass percentage, and adding water to stir uniformly to prepare slurry;
step two: and (3) slurry dehydration: dehydrating the slurry to obtain concentrated slurry with the water content of 30-38%, and then dehydrating the concentrated slurry for the second time by using a vacuum suction filter to obtain a filter cake with the water content of 15-20%;
step three: drying and crushing: drying and crushing the filter cake by using a drying crusher to obtain raw material powder with the water content of 1-4%;
step four: firing clinker: preheating and decomposing raw material powder, feeding the raw material powder into a burner and sintering the raw material powder into silicate cement clinker, wherein the sintering temperature is 1250-1500 ℃;
step five: fast cooling of clinker: rapidly cooling the portland cement clinker by using a cooling machine;
step six: and (3) cooling the portland cement clinker, the slag, the fluorgypsum and the glass fiber according to the weight ratio of 72: 11: 7: 8, mixing and grinding to obtain a component A;
step seven: sandstone, slag, fluorgypsum and high-calcium limestone are mixed according to the proportion of 41: 31: 9: 19, mixing and grinding the mixture to obtain a component B;
step eight: and (3) mixing the materials in a mass ratio of 73: 27 and uniformly mixing the component A and the component B to obtain the forty-two-point five-common low-alkali portland cement containing sandstone.
The strength of the cement is tested according to GB175-2007 and TB/T3275-2018 standards, and the test result shows that: the strength of the forty-two-point five-point common low-alkali portland cement containing sandstone is 30.1MPa in 3 days, the strength of the cement reaches 59.4MPa in 28 days, and meanwhile, the content of free calcium oxide in the cement is less than or equal to 1.0 percent, the content of alkali is less than or equal to 0.6 percent, and the content of chloride ions is less than or equal to 0.06 percent, which all meet the standard requirements.
Example 3:
the method comprises the following steps: preparation of raw materials: grinding 71% of raw limestone, 20% of raw sandstone and 9% of raw slag according to the mass percentage, and adding water to stir uniformly to prepare slurry;
step two: and (3) slurry dehydration: dehydrating the slurry to obtain concentrated slurry with the water content of 30-38%, and then dehydrating the concentrated slurry for the second time by using a vacuum suction filter to obtain a filter cake with the water content of 15-20%;
step three: drying and crushing: drying and crushing the filter cake by using a drying crusher to obtain raw material powder with the water content of 1-4%;
step four: firing clinker: preheating and decomposing raw material powder, feeding the raw material powder into a burner and sintering the raw material powder into silicate cement clinker, wherein the sintering temperature is 1250-1500 ℃;
step five: fast cooling of clinker: rapidly cooling the portland cement clinker by using a cooling machine;
step six: and (3) cooling the portland cement clinker, the slag, the fluorgypsum and the glass fiber according to a ratio of 77: 11: 7: 5, mixing and grinding to obtain a component A;
step seven: mixing sandstone, slag, fluorgypsum and high-calcium limestone according to the weight ratio of 45: 32: 8: 15, grinding the mixture after mixing to obtain a component B;
step eight: and (3) mixing the following components in percentage by mass: 43 and B to obtain the forty-two-point five-normal low-alkali portland cement containing sandstone.
The strength of the cement is tested according to GB175-2007 and TB/T3275-2018 standards, and the test result shows that: the strength of the forty-two-point five-common low-alkali portland cement containing sandstone is 28.5MPa in 3 days, the strength of the cement in 28 days reaches 58.8MPa, and meanwhile, the content of free calcium oxide in the cement is less than or equal to 1.0 percent, the content of alkali is less than or equal to 0.6 percent, and the content of chloride ions is less than or equal to 0.06 percent, which all meet the standard requirements.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (7)
1. A forty-two-point five-normal low-alkali silicate cement containing sandstone is characterized in that: comprises a component A and a component B;
the component A comprises: portland cement clinker, slag, fluorgypsum and glass fiber;
the component B comprises: sandstone, slag, fluorgypsum, high calcium limestone;
wherein the portland cement clinker comprises the following raw materials in percentage by mass: 70-80% of raw limestone, 15-20% of raw sandstone and 5-10% of raw slag.
2. The forty-two point five common low alkali portland cement containing sandstone according to claim 1, wherein: the mass ratio of the component A to the component B is (75-85): (15-25).
3. The forty-two point five common low alkali portland cement containing sandstone according to claim 1, wherein: the mass ratio of the component A to the component B is (60-80): (20-40).
4. The forty-two point five common low alkali portland cement containing sandstone according to claim 1, wherein: the mass ratio of the component A to the component B is (50-65): (35-50).
5. The forty-two point five common low alkali portland cement containing sandstone according to any one of claims 1 to 4, wherein: the component A comprises the following components in percentage by mass: portland cement clinker: 70-80%, slag: 10-20% and fluorgypsum: 5-10% of glass fiber: 5 to 10 percent.
6. The forty-two point five common low alkali portland cement containing sandstone according to any one of claims 1 to 4, wherein: the component B comprises the following components in percentage by mass: sandstone: 35-45% of furnace slag: 20-35% and fluorgypsum: 5-10% of high-calcium limestone: 15 to 25 percent.
7. The method for preparing forty-two-point five-normal low-alkali portland cement containing sandstone according to claim 1, wherein the method comprises the following steps: the method comprises the following steps:
the method comprises the following steps: preparation of raw materials: grinding 70-80% of raw limestone, 15-20% of raw sandstone and 5-10% of raw slag according to mass percentage, and adding water to stir uniformly to prepare slurry;
step two: and (3) slurry dehydration: dehydrating the slurry to obtain concentrated slurry with the water content of 30-38%, and then dehydrating the concentrated slurry for the second time by using a vacuum suction filter to obtain a filter cake with the water content of 15-20%;
step three: drying and crushing: drying and crushing the filter cake by using a drying crusher to obtain raw material powder with the water content of 1-4%;
step four: firing clinker: preheating and decomposing raw material powder, feeding the raw material powder into a burner and sintering the raw material powder into silicate cement clinker, wherein the sintering temperature is 1250-1500 ℃;
step five: fast cooling of clinker: rapidly cooling the portland cement clinker by using a cooling machine;
step six: grinding the cooled portland cement clinker, the slag, the fluorgypsum and the glass fiber to obtain a component A;
step seven: grinding sandstone, furnace slag, fluorgypsum and high-calcium limestone to obtain a component B;
step eight: and uniformly mixing the component A and the component B to obtain the forty-two-point five-normal low-alkali portland cement containing sandstone.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351445A (en) * | 2011-06-08 | 2012-02-15 | 广西鱼峰水泥股份有限公司 | Ultra low-alkali portland cement and production method thereof |
| CN108358481A (en) * | 2018-03-06 | 2018-08-03 | 济南大学 | A kind of weathering fine sand batholith cement and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351445A (en) * | 2011-06-08 | 2012-02-15 | 广西鱼峰水泥股份有限公司 | Ultra low-alkali portland cement and production method thereof |
| CN108358481A (en) * | 2018-03-06 | 2018-08-03 | 济南大学 | A kind of weathering fine sand batholith cement and preparation method thereof |
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Application publication date: 20210122 |