CN113526885B - Road portland cement and preparation method thereof - Google Patents
Road portland cement and preparation method thereof Download PDFInfo
- Publication number
- CN113526885B CN113526885B CN202010287134.1A CN202010287134A CN113526885B CN 113526885 B CN113526885 B CN 113526885B CN 202010287134 A CN202010287134 A CN 202010287134A CN 113526885 B CN113526885 B CN 113526885B
- Authority
- CN
- China
- Prior art keywords
- slag
- clinker
- blast furnace
- portland cement
- raw materials
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
-
- 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
-
- 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
-
- 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
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Road Paving Structures (AREA)
Abstract
The invention relates to the technical field of cement preparation, and discloses road portland cement and a preparation method thereof. The method comprises the following steps: (1) Drying and grinding the raw materials to obtain raw materials with the screen residue percentage of 16-20% of a 80-micron square-hole sieve; (2) Homogenizing, preheating, decomposing, calcining and cooling the raw material obtained in the step (1) in sequence to obtain clinker; (3) And (3) mixing the clinker obtained in the step (2) with desulfurized gypsum, blast furnace granulated slag and blast furnace steel slag, and then grinding. The method utilizes the solid wastes generated in the production of the polyvinyl chloride by the calcium carbide method to replace limestone, and can produce the road portland cement clinker meeting the national standard requirement and perform resource utilization on the calcium carbide slag by optimizing the raw material, clinker batching scheme and clinker calcining process operation parameters.
Description
Technical Field
The invention relates to the technical field of cement preparation, in particular to road portland cement and a preparation method thereof.
Background
The road portland cement (GBT 13693-2017 road portland cement) belongs to special cement, is mainly applied to the construction of airfield runways and highway pavements, has good wear resistance and dry shrinkage resistance, can well control the difference of internal and external temperatures in the large-area concrete hardening process, and obviously reduces the probability of concrete cracks.
At present, natural limestone is usually used as a calcium source for producing road portland cement, and other SiO-containing substances are matched with the natural limestone 2 、Al 2 O 3 、Fe 2 O 3 The raw materials with main components are ground according to a certain proportion to prepare raw material powder with reasonable ratio, and the raw material powder is sent into a novel dry-method rotary kiln through homogenizing conveying equipment to be calcined into road silicate cement clinker meeting the standard requirements. However, the use of limestone as a source of calcium has the following disadvantages: firstly, the decomposition temperature of calcium carbonate in the limestone is high, and more energy is consumed when the limestone is used for producing cement clinker; secondly, the limestone is a non-renewable resource, which is easy to cause resource waste; thirdly, the mining of limestone can cause the ecological environment of the mine to be destroyed.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides road portland cement and a preparation method thereof.
In order to achieve the above object, a first aspect of the present invention is a method for preparing a road portland cement, comprising the steps of:
(1) Drying and grinding the raw materials to obtain raw materials with the screen residue percentage of 16-20% of a 80-micron square-hole sieve;
(2) Homogenizing, preheating, decomposing, calcining and cooling the raw material obtained in the step (1) in sequence to obtain clinker;
(3) Mixing the clinker obtained in the step (2) with desulfurized gypsum, blast furnace granulated slag and blast furnace steel slag, and then grinding;
wherein, in the step (1), the raw materials comprise 70-75 wt% of carbide slag, 4-8 wt% of waste silica stone, 6-10 wt% of fly ash and 10-15 wt% of converter slag, wherein the total weight of the raw materials is 100%;
in the step (2), the temperature of the calcination is 1440-1460 ℃;
in the step (3), the total weight of the clinker, the desulfurized gypsum, the blast furnace granulated slag and the blast furnace steel slag is 100%, the clinker is 80-95 wt%, the desulfurized gypsum is 4-8 wt%, the blast furnace granulated slag is 0-8 wt%, and the blast furnace steel slag is 0-7 wt%.
Preferably, in the step (1), the raw material comprises 71-74 wt% of carbide slag, 5-7 wt% of waste silica, 7-9 wt% of fly ash and 12-14 wt% of converter slag, based on the total weight of the raw material as 100%.
Preferably, in the step (1), the drying and pulverizing process is performed in a medium discharge drying mill.
Preferably, in step (2), the preheating is performed in a rotary kiln preheater, and the preheating conditions include: the temperature is 550-570 ℃.
Preferably, in the step (2), the decomposition is carried out in a decomposing furnace, and the temperature of the decomposition is 850-950 ℃.
Preferably, in step (2), the calcination is carried out in a rotary kiln, and the calcination time is 15-20min.
Preferably, in step (2), the cooling is performed in a grate cooler.
Preferably, in the step (3), the grinding is performed in a roller press semi-finish grinding system.
Preferably, in the step (3), the clinker is used in an amount of 85 to 90 wt%, the desulfurized gypsum is used in an amount of 5 to 7 wt%, the blast furnace granulated slag is used in an amount of 2 to 5 wt%, and the blast furnace slag is used in an amount of 1 to 5 wt%, based on 100% by weight of the total weight of the clinker, the desulfurized gypsum, the blast furnace granulated slag, and the blast furnace slag.
In a second aspect, the present invention provides a road portland cement prepared by the above method.
The method for preparing the road portland cement utilizes the solid wastes generated in the production of the polyvinyl chloride by the calcium carbide method to replace limestone, and can produce the road portland cement clinker meeting the national standard requirement and perform resource utilization on the carbide slag by optimizing the raw material and clinker batching scheme and the clinker calcining process operating parameters.
Detailed Description
The following describes in detail specific embodiments of the present invention. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are given by way of illustration and explanation only, not limitation.
The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.
In a first aspect of the present invention, there is provided a process for preparing a road portland cement, comprising the steps of:
(1) Drying and grinding the raw materials to obtain raw materials with fineness of 16-20%;
(2) Homogenizing, preheating, decomposing, calcining and cooling the raw material obtained in the step (1) in sequence to obtain clinker;
(3) Mixing the clinker obtained in the step (2) with desulfurized gypsum, blast furnace granulated slag and blast furnace steel slag, and then grinding;
wherein, in the step (1), the raw materials comprise 70-75 wt% of carbide slag, 4-8 wt% of waste silica stone, 6-10 wt% of fly ash and 10-15 wt% of converter slag, wherein the total weight of the raw materials is 100%;
in the step (2), the temperature of the calcination is 1440-1460 ℃;
in the step (3), the total weight of the clinker, the desulfurized gypsum, the blast furnace granulated slag and the blast furnace steel slag is 100%, the clinker is 80-95 wt%, the desulfurized gypsum is 4-8 wt%, the blast furnace granulated slag is 0-8 wt%, and the blast furnace steel slag is 0-7 wt%.
In the method, the carbide slag is used in the raw materials to replace the traditional limestone, so that the use of the non-renewable resource limestone can be reduced, the resource utilization of the carbide slag can be realized, and the influence of the carbide slag on the environment is reduced.
In the method, the carbide slag is solid waste generated in the process of producing the polyvinyl chloride by the calcium carbide method.
In the method, the waste silica refers to wollastonite tailings stripped in the process of exploiting the silica lime, and the main component of the waste silica is silicon dioxide.
In the method of the invention, the main component of the fly ash is Al 2 O 3 。
In the method of the present invention, the converter slag is waste slag generated in the converter steelmaking process, mainly comes from oxides formed by oxidizing elements contained in molten iron and scrap, and mainly contains Fe 2 O 3 。
In the method, the carbide slag, the fly ash and the converter slag contained in the raw materials are all from various wastes generated in industrial production, and the carbide slag, the waste silica stone, the fly ash and the converter slag are used as the raw materials for producing the portland cement, so that the waste can be changed into valuable, the effect of resource utilization can be achieved, the waste discharge can be reduced, and the environment can be protected.
Preferably, in the step (1), the raw material comprises 71-74 wt% of carbide slag, 5-7 wt% of waste silica, 7-9 wt% of fly ash and 12-14 wt% of converter slag, based on the total weight of the raw material as 100%.
In the method of the invention, the percent screen residue of the 80-micron square-hole sieve is used for expressing the fineness of the raw material. In a specific embodiment, the percent rejects are tested using the method described in GBT 1345-2005.
In the method of the present invention, in the step (1), there is no particular requirement for the selection of the equipment for performing the drying and pulverizing process, and it may be selected conventionally in the art. In a specific embodiment, the drying and grinding process is carried out in a medium discharge drying mill.
In the method of the present invention, preferably, in step (2), the preheating is performed in a rotary kiln preheater, and the preheating conditions include: the temperature is 550-570 ℃. Specifically, the preheating temperature can be 550 ℃, 555 ℃, 560 ℃, 565 ℃ or 570 ℃.
In the method of the present invention, in the step (2), there is no particular requirement for the preheating time as long as the raw meal can be brought to the preheating temperature. In a specific embodiment, the preheating time may be 1-2s.
In the method of the present invention, preferably, in the step (2), the decomposition is performed in a decomposing furnace, and the temperature of the decomposition is 850 to 950 ℃.
In the method of the present invention, in the step (2), there is no particular limitation on the time of the decomposition, and it may be a routine choice in the art. In a specific embodiment, the time of the decomposition may be 1-2s.
In the method of the present invention, in specific embodiments, the temperature of the calcination may be 1440 ℃, 1445 ℃, 1450 ℃, 1455 ℃ or 1460 ℃.
In the method of the present invention, preferably, the calcination is performed in a rotary kiln, and the calcination time is 15 to 20min. Specifically, the calcination time may be 15min, 15.5min, 16min, 17min, 18min, 19min or 20min.
In the method of the present invention, preferably, in the step (2), the cooling is performed in a grate cooler.
In the method of the present invention, preferably, in the step (3), the grinding is performed in a roller press semi-final grinding system.
In the method of the present invention, preferably, in step (3), the clinker is used in an amount of 85-90 wt%, the desulfurized gypsum is used in an amount of 5-7 wt%, the granulated blast furnace slag is used in an amount of 2-5 wt%, and the blast furnace slag is used in an amount of 1-5 wt%, based on 100% by weight of the total weight of the clinker, the desulfurized gypsum, the granulated blast furnace slag, and the blast furnace slag.
In a second aspect, the present invention provides a road portland cement prepared by the above method.
The method for preparing the road portland cement has the following advantages:
(1) The characteristic that calcium carbonate decomposition is not needed in the clinker calcining process of the carbide slag is utilized, and the sintering heat consumption of the conventional limestone for producing the road portland cement clinker is reduced.
(2) The variety and structure range of cement produced by carbide slag is widened.
(3) The utilization amount of the carbide slag in cement making industry from the carbide slag is increased, and the influence of the carbide slag on the environment is reduced.
The present invention will be described in detail below by way of examples, but the scope of the present invention is not limited thereto.
Example 1
(1) Drying and grinding the raw materials in a middle-discharge drying mill to obtain a raw material with the screen residue percentage of 16 percent of a 80-micron square-hole sieve; wherein the raw material comprises 72.41 weight percent of carbide slag, 5.81 weight percent of waste silica, 8.68 weight percent of fly ash and 13.1 weight percent of converter slag, based on the total weight of the raw material as 100 percent;
(2) Homogenizing the raw material obtained in the step (1) in a homogenizing warehouse, preheating in a rotary kiln preheater (the preheating temperature is 560 ℃), decomposing in a kiln tail decomposing furnace (the decomposing temperature is 900 ℃), calcining in a rotary kiln (the calcining temperature is 1450 ℃, the calcining time is 15.5 min), and finally cooling in a grate cooler to obtain clinker;
(3) Mixing the clinker obtained in the step (2) with desulfurized gypsum, blast furnace granulated slag and blast furnace steel slag, and then grinding in a semi-final grinding system of a roller press; the road Portland cement A1 is obtained by taking the total weight of the clinker, the desulfurized gypsum, the blast furnace granulated slag and the blast furnace steel slag as 100%, wherein the clinker is used in an amount of 90 wt%, the desulfurized gypsum is used in an amount of 5 wt%, the blast furnace granulated slag is used in an amount of 3 wt%, and the blast furnace steel slag is used in an amount of 2 wt%.
Example 2
(1) Drying and grinding the raw materials in a middle-discharge drying mill to obtain a raw material with the screen residue percentage of 16.5 percent of a 80-micron square-hole sieve; wherein, the raw material comprises 71 weight percent of carbide slag, 7 weight percent of waste silica, 10 weight percent of fly ash and 12 weight percent of converter slag, based on the total weight of the raw material as 100 percent;
(2) Homogenizing the raw material obtained in the step (1) in a homogenizing warehouse, preheating in a rotary kiln preheater (the preheating temperature is 570 ℃), decomposing in a kiln tail decomposing furnace (the decomposing temperature is 860 ℃), calcining in a rotary kiln (the calcining temperature is 1455 ℃, and the calcining time is 16 min), and finally cooling in a grate cooler to obtain clinker;
(3) Mixing the clinker obtained in the step (2) with desulfurized gypsum, and then grinding in a semi-finished grinding system of a roller press; wherein, the clinker is used in an amount of 95 wt% and the desulfurized gypsum is used in an amount of 5 wt% based on 100% of the total weight of the clinker and the desulfurized gypsum, so as to obtain the road portland cement A2.
Example 3
(1) Drying and grinding the raw materials in a middle-discharge drying mill to obtain a raw material with the screen residue percentage of 19 percent of a 80-micron square-hole sieve; wherein the raw materials comprise 75 weight percent of carbide slag, 4 weight percent of waste silica, 7.5 weight percent of fly ash and 13.5 weight percent of converter slag, wherein the total weight of the raw materials is 100 percent;
(2) Homogenizing the raw material obtained in the step (1) in a homogenizing warehouse, preheating in a rotary kiln preheater (preheating temperature is 555 ℃), decomposing in a kiln tail decomposing furnace (decomposing temperature is 920 ℃), calcining in a rotary kiln (calcining temperature is 1445 ℃ and calcining time is 17 min), and finally cooling in a grate cooler to obtain clinker;
(3) Mixing the clinker obtained in the step (2) with desulfurized gypsum, blast furnace granulated slag and blast furnace steel slag, and then grinding in a semi-final grinding system of a roller press; wherein, by taking the total weight of the clinker, the desulfurized gypsum, the blast furnace granulated slag and the blast furnace steel slag as 100 percent, the clinker is used in an amount of 80 percent by weight, the desulfurized gypsum is used in an amount of 8 percent by weight, the blast furnace granulated slag is used in an amount of 8 percent by weight, and the blast furnace steel slag is used in an amount of 4 percent by weight, so as to obtain the road Portland cement A3.
Example 4
(1) Drying and grinding the raw materials in a middle-discharge drying mill to obtain a raw material with the screen residue percentage of 17.5 percent of a 80-micron square-hole sieve; wherein the raw material comprises 71.6 weight percent of carbide slag, 6.6 weight percent of waste silica, 7.8 weight percent of fly ash and 14 weight percent of converter slag, wherein the total weight of the raw material is 100 percent;
(2) Homogenizing the raw material obtained in the step (1) in a homogenizing silo, preheating in a rotary kiln preheater (the preheating temperature is 565 ℃), decomposing in a kiln tail decomposing furnace (the decomposing temperature is 880 ℃), calcining in a rotary kiln (the calcining temperature is 1450 ℃, the calcining time is 18 min), and finally cooling in a grate cooler to obtain clinker;
(3) Mixing the clinker obtained in the step (2) with desulfurized gypsum, blast furnace granulated slag and blast furnace steel slag, and then grinding in a semi-final grinding system of a roller press; wherein, by taking the total weight of the clinker, the desulfurized gypsum, the blast furnace granulated slag and the blast furnace steel slag as 100 percent, the consumption of the clinker is 87 percent by weight, the consumption of the desulfurized gypsum is 4 percent by weight, the consumption of the blast furnace granulated slag is 1 percent by weight, and the consumption of the blast furnace steel slag is 8 percent by weight, so as to obtain the road Portland cement A4.
Example 5
(1) Drying and grinding the raw materials in a middle-discharge drying mill to obtain a raw material with the screen residue percentage of 16 percent of a 80-micron square-hole sieve; wherein, the raw material comprises 73.5 percent by weight of carbide slag, 4.5 percent by weight of waste silica stone, 8.5 percent by weight of fly ash and 13.5 percent by weight of converter slag, based on the total weight of the raw material as 100 percent;
(2) Homogenizing the raw material obtained in the step (1) in a homogenizing warehouse, preheating in a rotary kiln preheater (the preheating temperature is 560 ℃), decomposing in a kiln tail decomposing furnace (the decomposing temperature is 890 ℃), calcining in a rotary kiln (the calcining temperature is 1450 ℃, the calcining time is 15 min), and finally cooling in a grate cooler to obtain clinker;
(3) Mixing the clinker obtained in the step (2) with desulfurized gypsum, blast furnace granulated slag and blast furnace steel slag, and then grinding in a semi-final grinding system of a roller press; wherein, the total weight of the clinker, the desulfurized gypsum, the blast furnace granulated slag and the blast furnace steel slag is 100%, the clinker is 85 wt%, the desulfurized gypsum is 6 wt%, the blast furnace granulated slag is 5 wt%, and the blast furnace steel slag is 4 wt%, so as to obtain the road Portland cement A5.
Reference example
The road portland cement D1 is prepared by adopting a traditional method for preparing the road portland cement by taking limestone as a raw material.
Test example 1
The contents (mass fractions) of sulfur trioxide, magnesium oxide and free calcium oxide in the clinker prepared in examples 1 to 5 were measured by methods reported in national standards, and the measurement standards (GBT 13693-2017) and the measurement methods are shown in table 1, and the measurement results are shown in table 2.
As can be seen from the data in Table 2, the clinker produced in examples 1-5 has satisfactory contents of sulfur trioxide, magnesium oxide and free calcium oxide.
TABLE 1
| Composition (I) | Standard requirements | Detection method |
| Sulfur trioxide | ≤1.5％ | GB/T176-2017/7 |
| Magnesium oxide | ≤5％ | GB/T176-2017/7 |
| Free calcium oxide | ≤1.5％ | GB/T176-2017/6.37 |
TABLE 2
Test example 2
The road portland cements prepared in examples 1-5 and the reference example were tested by the methods reported in the national standards, and the test items, test standards and test methods are shown in table 3, and the test results are shown in table 4.
TABLE 3
| Detecting items | Unit of measurement | Standard requirements of | Detection method |
| Specific surface area | m 2 /kg | 300-450 | GB/T8074-2008 |
| Initial setting time | min | ≥90 | GB/T1346-2011/8 |
| Final setting time | min | ≤720 | GB/T1346-2011/8 |
| Stability of | mm | ≤5.0 | GB/T1346-2011/9 |
| Sulfur trioxide | ％ | ≤3.5 | GB/T176-2017/6.5/7 |
| Magnesium oxide | ％ | ≤5.0 | GB/T176-2017/7 |
| Loss on ignition | ％ | ≤3.0 | GB/T176-2017/6.3 |
| Chloride ion | ％ | ≤0.06 | 176-2017/6.32/7 |
| Dry shrinkage rate | ％ | ≤0.10 | JC/T603-2004(2007) |
| Wear resistance | kg/m 2 | ≤3.00 | JC/T421-2004 |
| Internal irradiation index of building main body material | / | ≤1.0 | GB6566-2010 |
| External irradiation index of building main body material | / | ≤1.0 | GB6566-2010 |
| Breaking strength (3 balance mean) | MPa | ≥5.0 | GB/T17671-1999 |
| Flexural strength (28 balance mean) | MPa | ≥8.5 | GB/T17671-1999 |
TABLE 4
As can be seen from the results shown in Table 4, the cement prepared in examples 1 to 5 according to the method of the present invention satisfies the national standards for each parameter.
The preferred embodiments of the present invention have been described above in detail, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention, including combinations of various technical features in any other suitable way, and these simple modifications and combinations should also be regarded as the disclosure of the invention, and all fall within the scope of the invention.
Claims (6)
1. A method of preparing a road portland cement, comprising the steps of:
(1) Drying and grinding the raw materials to obtain raw materials with the screen residue percentage of 16-20% of a 80-micron square-hole sieve;
(2) Homogenizing, preheating, decomposing, calcining and cooling the raw material obtained in the step (1) in sequence to obtain clinker;
(3) Mixing the clinker obtained in the step (2) with desulfurized gypsum, blast furnace granulated slag and blast furnace steel slag, and then grinding;
wherein, in the step (1), the raw materials comprise 70-75 wt% of carbide slag, 4-8 wt% of waste silica stone, 6-10 wt% of fly ash and 10-15 wt% of converter slag, wherein the total weight of the raw materials is 100%;
in the step (2), the calcination is carried out in a rotary kiln, the calcination temperature is 1440-1460 ℃, and the calcination time is 15-20min; the preheating is carried out in a rotary kiln preheater, and the preheating conditions comprise: the temperature is 550-570 ℃; the decomposition is carried out in a decomposing furnace, and the decomposition temperature is 850-950 ℃;
in the step (3), the total weight of the clinker, the desulfurized gypsum, the blast furnace granulated slag and the blast furnace steel slag is 100%, the clinker is 85-90 wt%, the desulfurized gypsum is 5-7 wt%, the blast furnace granulated slag is 2-5 wt%, and the blast furnace steel slag is 1-5 wt%.
2. The method for preparing road portland cement according to claim 1, wherein in step (1), the raw materials comprise 71-74 wt% of carbide slag, 5-7 wt% of waste silica stone, 7-9 wt% of fly ash and 12-14 wt% of converter slag, based on the total weight of the raw materials taken as 100%.
3. The method for preparing road portland cement according to claim 1, wherein in step (1), the drying and pulverizing process is performed in a medium-discharge drying mill.
4. The method for preparing road portland cement according to claim 1, wherein in step (2), the cooling is performed in a grate cooler.
5. The method for preparing road portland cement according to claim 1, wherein in step (3), the grinding is performed in a roller press semi-finish grinding system.
6. A road portland cement produced by the method of any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010287134.1A CN113526885B (en) | 2020-04-13 | 2020-04-13 | Road portland cement and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010287134.1A CN113526885B (en) | 2020-04-13 | 2020-04-13 | Road portland cement and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113526885A CN113526885A (en) | 2021-10-22 |
| CN113526885B true CN113526885B (en) | 2022-11-11 |
Family
ID=78087925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010287134.1A Active CN113526885B (en) | 2020-04-13 | 2020-04-13 | Road portland cement and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113526885B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109081615A (en) * | 2018-07-11 | 2018-12-25 | 盐城工学院 | A kind of road silicate cement clinker and preparation method thereof based on industrial residue |
| CN112159131A (en) * | 2020-09-10 | 2021-01-01 | 内蒙古亿利冀东水泥有限责任公司 | Road silicate cement clinker taking carbide slag as raw material and preparation method thereof |
| CN112374778A (en) * | 2020-11-30 | 2021-02-19 | 北京中研益工程技术开发中心有限公司 | High-strength non-shrinkage road portland cement and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100556840C (en) * | 2006-11-12 | 2009-11-04 | 新疆建材设计研究院（有限公司） | Carbide slag 100% substitutes natural calcareous raw material kiln and decomposes the method for producing cement clinker outward |
| CN104496228A (en) * | 2014-12-30 | 2015-04-08 | 中国建筑材料科学研究总院 | Road silicate cement clinker and preparation method thereof |
| CN108049276A (en) * | 2017-11-27 | 2018-05-18 | 固岩科技发展有限公司 | A kind of construction method of road against corrosion |
-
2020
- 2020-04-13 CN CN202010287134.1A patent/CN113526885B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109081615A (en) * | 2018-07-11 | 2018-12-25 | 盐城工学院 | A kind of road silicate cement clinker and preparation method thereof based on industrial residue |
| CN112159131A (en) * | 2020-09-10 | 2021-01-01 | 内蒙古亿利冀东水泥有限责任公司 | Road silicate cement clinker taking carbide slag as raw material and preparation method thereof |
| CN112374778A (en) * | 2020-11-30 | 2021-02-19 | 北京中研益工程技术开发中心有限公司 | High-strength non-shrinkage road portland cement and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 电石渣制水泥用于道路施工裂缝的消除措施;董恒恒等;《水泥》;20170710(第07期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113526885A (en) | 2021-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105060745B (en) | Belite aluminium sulfate ferrous aluminate cement and preparation method thereof | |
| CN102249568B (en) | Low-alkali expansive moderate heat silicate cement and production method thereof | |
| CN103864320B (en) | Low heat portland blast-furnace-slag cement and production method thereof | |
| CN103435281A (en) | Cement clinker and preparation process thereof | |
| CN103553377B (en) | Method for producing silicate clinker by using yellow phosphorus slag to replace part of clay | |
| CN111943535A (en) | Method for producing general portland cement from construction waste and polluted soil | |
| CN102649628B (en) | Method for producing super-low-alkali silicate cement clinker by using industrial waste residue on 5KT/D dry-process kiln | |
| CN112159131A (en) | Road silicate cement clinker taking carbide slag as raw material and preparation method thereof | |
| CN105502974A (en) | Method for treating and utilizing nickel mineral metallurgy waste residues | |
| CN107473613B (en) | A kind of cement and preparation method thereof using industrial solid-state castoff production | |
| CN105621910A (en) | Sulphate aluminum cement clinker and preparation method thereof and sulphate aluminum cement | |
| CN109437612A (en) | It is a kind of using steel slag and slag as clinker-free cement of primary raw material and preparation method thereof | |
| CN101580347B (en) | Composite industrial residue mineralizer cement clinker | |
| CN112125542A (en) | Composite portland cement and preparation method thereof | |
| CN106277872B (en) | Application of the iron cement containing calorific value in producing clinker | |
| CN107804982A (en) | A kind of industrial residue low alkali cement and preparation method thereof | |
| CN107382107B (en) | Method for preparing sulphoaluminate cement clinker by using magnesium slag and manganese slag | |
| CN102730991A (en) | Method for producing sulfate resistant cement by using converter steel slag | |
| CN105271847A (en) | Method for preparing cement clinker form lead-zinc ore and manganese ore flotation tailing as raw material | |
| CN112174551A (en) | Method for preparing cement clinker by using molybdenum tailings, cement clinker and application | |
| CN113526885B (en) | Road portland cement and preparation method thereof | |
| CN110862240A (en) | Slag micro powder, admixture thereof, preparation method and application thereof, and cement and/or concrete | |
| CN115650607A (en) | Slag silicate cement clinker prepared from stone coal vanadium extraction tailings and preparation method thereof | |
| CN104193199A (en) | High magnesium slag doped cement | |
| CN115385590A (en) | Early-strength low-hydration-heat portland cement clinker prepared from rare earth tailings and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |