CN113526882B - Portland cement clinker and preparation method thereof - Google Patents
Portland cement clinker and preparation method thereof Download PDFInfo
- Publication number
- CN113526882B CN113526882B CN202010287170.8A CN202010287170A CN113526882B CN 113526882 B CN113526882 B CN 113526882B CN 202010287170 A CN202010287170 A CN 202010287170A CN 113526882 B CN113526882 B CN 113526882B
- Authority
- CN
- China
- Prior art keywords
- slag
- cement clinker
- water
- containing gas
- gas slag
- 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
- C04B7/24—Cements from oil shales, residues or waste other than slag
-
- 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
- C04B7/06—Portland cement using alkaline raw materials
-
- 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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/434—Preheating with addition of fuel, e.g. calcining
-
- 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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the field of environmental protection and comprehensive utilization of industrial waste residues, in particular to Portland cement clinker and a preparation method thereof, wherein the method comprises the following steps: (1) Mixing the water-containing gas slag and the calcium carbide wet slag and drying; (2) Mixing the dried mixture obtained in the step (1) with other auxiliary materials, and grinding to obtain raw materials; (3) Sequentially homogenizing, preheating, decomposing and calcining the raw material obtained in the step (2) to obtain cement clinker; wherein in the step (1), the amount of the water-containing gas slag is 2-10 wt% based on 100% of the total weight of the water-containing gas slag and the calcium carbide wet slag; in the step (2), the fineness of the raw meal is 16-20%. The invention has the advantages that: (1) By utilizing the characteristic of high residual carbon content of the gas slag, the system temperature can be increased and the system energy consumption can be reduced during combustion; (2) The emission of nitrogen oxides in the cement clinker calcination process is reduced; (3) And the solid waste of the gas slag is fully digested, so that the environmental pollution is reduced.
Description
Technical Field
The invention relates to the field of environmental protection and comprehensive utilization of industrial waste residues, in particular to silicate cement clinker and a preparation method thereof.
Background
In recent years, a batch of coal chemical enterprises are built in China, production is carried out successively, the yield is increased year by year, and clean comprehensive utilization of coal resources is formed to a certain scale. Coal gasification technology is one of the core contents of clean coal technology, and is an important direction for coal resource and energy utilization. Along with the development of coal chemical industry, coal gasification residues are increased rapidly, however, land is occupied when stacking, and percolate of the coal gasification residues can pollute soil and water sources. At present, except landfill and open-air stacking, the gas slag is only used for building material raw materials, circulating fluidized bed blending materials and high added value recycling, and the related information for raw material ingredients in the cement industry is little.
Statistics data related to environmental protection departments show that the emission of nitrogen oxides in the cement industry accounts for about 10% -12% of the total national quantity, and the nitrogen oxides are the third largest emission source after a thermal power plant and a motor vehicle. How to reduce the emission of nitrogen oxides becomes a problem to be solved urgently for cement enterprises in China.
Currently, the patents for using gas slag for cement mainly include: (1) A method for preparing low-clinker cement by calcining coal gasification slag step by step (application number 201810194030.9) in the patent filed by Hunan university of science and technology; (2) A method for preparing low clinker cement by suspension roasting of gas slag (application number 201810193878. X). The patent can effectively utilize the gas slag to cement preparation to change waste into valuable, but does not study how to reduce the emission of nitrogen oxides generated by cement clinker calcination.
Disclosure of Invention
The invention aims to effectively utilize solid waste gas slag and reduce the discharge of calcined nitrogen oxides of cement clinker, and provides silicate cement clinker and a preparation method thereof.
In order to achieve the above object, the present invention provides a method for preparing Portland cement clinker, comprising the steps of:
(1) Mixing the water-containing gas slag and the calcium carbide wet slag and drying;
(2) Mixing the dried mixture obtained in the step (1) with other auxiliary materials, and grinding to obtain raw materials;
(3) Sequentially homogenizing, preheating, decomposing and calcining the raw material obtained in the step (2) to obtain cement clinker;
wherein in the step (1), the amount of the water-containing gas slag is 2-10 wt% based on 100% of the total weight of the water-containing gas slag and the calcium carbide wet slag;
in the step (2), the fineness of the raw meal is 16-20%.
Preferably, the water content of the water-containing gas slag is 60-75% by weight.
Preferably, in the step (2), the other auxiliary materials comprise silicon waste stone, fly ash, converter slag and copper slag.
Preferably, the mass ratio of the silicon waste stone to the fly ash to the converter slag to the copper slag is (1-5) to (1-20) to (1-5) to 1.
Preferably, in the step (2), the mass ratio of the drying mixture to other auxiliary materials is 1:0.05-1.
Preferably, in step (2), the grinding treatment is performed in a medium-discharge type drying mill.
Preferably, in step (3), the preheating is performed in a rotary kiln preheater at a preheating temperature of 500-600 ℃.
Preferably, in step (3), the decomposition is carried out in a decomposing furnace at a decomposition temperature of 800-1000 ℃.
Preferably, in step (3), the calcination is carried out in a rotary kiln at a calcination temperature of 1400-1700 ℃.
In another aspect, the invention provides Portland cement clinker prepared by the method.
The ground raw materials are mixed with high-temperature gas when entering the first stage of the preheater system, and part of gas slag is combusted to release heat to improve the gas temperature of the preheater, so that the energy consumption of the system is reduced. The rest of the gas slag is continuously combusted in each cyclone barrel and the decomposing furnace, and a large amount of carbon monoxide is generated in the preheater under the condition of insufficient oxygen so as to enable the whole system to form a reducing atmosphere, and the gas slag is continuously reacted with nitrogen oxides in flue gas from the kiln and the furnace to generate nitrogen under the condition of no catalyst in the process of descending the gas slag, so that the emission of the nitrogen oxides is reduced.
Detailed Description
The following describes specific embodiments of the present invention in detail. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
The endpoints and any values of the ranges disclosed herein are not limited to the precise range or value, and are understood to encompass values approaching those ranges or values. For numerical ranges, one or more new numerical ranges may be found between the endpoints of each range, between the endpoint of each range and the individual point value, and between the individual point value, in combination with each other, and are to be considered as specifically disclosed herein.
In one aspect, the present invention provides a method for preparing Portland cement clinker, comprising the steps of:
(1) Mixing the water-containing gas slag and the calcium carbide wet slag and drying;
(2) Mixing the dried mixture obtained in the step (1) with other auxiliary materials, and grinding to obtain raw materials;
(3) Sequentially homogenizing, preheating, decomposing and calcining the raw material obtained in the step (2) to obtain cement clinker;
wherein in the step (1), the amount of the water-containing gas slag is 2-10 wt% based on 100% of the total weight of the water-containing gas slag and the calcium carbide wet slag;
in the step (2), the fineness of the raw meal is 16-20%.
In a preferred embodiment, the aqueous gas-slag is added in an amount of 3 to 9% by weight, based on 100% total weight of the aqueous gas-slag and the calcium carbide wet slag. Specifically, the water-containing gas slag may be added in an amount of 3%, 4%, 5%, 6%, 7%, 8% or 9%.
In the process according to the invention, the water content of the aqueous gas slag in step (1) is 60-75% by weight, preferably, for example, 60%, 65%, 68%, 70% or 75%.
In the process according to the invention, in step (2), the raw meal fineness is 16-20%, preferably, for example, 16%, 17%, 18%, 19% or 20%. It should be noted that the fineness detection method is a sieve analysis method using a 80 μm square hole standard sieve according to GB/T1345-2005 standard, and the fineness is expressed as a percentage of screen residue (%).
In the method according to the invention, the other auxiliary material mentioned in step (2) may be a common general silicate-based industrial waste residue, and may be, in a preferred case, one or any mixture of a silicon waste, fly ash, converter slag, copper slag, coal slag and kiln dust, and specifically, may be, for example, silicon waste, fly ash, converter slag and copper slag.
In the method of the invention, in the step (2), the mass ratio of the silicon waste stone to the fly ash to the converter slag to the copper slag is (1-5) to (1-20) to (1-5) to 1, and in the preferred case, the mass ratio of the silicon waste stone to the fly ash to the converter slag to the copper slag is (1-4) to (1-10) to (1-4) to 1, and more preferred is (2-4) to (2-10) to (2-4) to 1.
In the method of the present invention, the mass ratio of the drying mixture in the step (2) to the other auxiliary materials is 1: (0.05-1), and in a preferred case, the mass ratio of the drying mixture to the other auxiliary materials is 1: (0.1-0.5), specifically, for example, may be 1:0.1, 1:0.2, 1:0.3, 1:0.4 or 1:0.5.
In the method of the invention, the grinding treatment in the step (2) is performed in a medium-unloading type drying mill.
In the process according to the invention, in step (3), the preheating is carried out in a rotary kiln preheater at a preheating temperature of 500-600 ℃, in particular, for example, 500 ℃, 520 ℃, 540 ℃, 560 ℃, 580 ℃ or 600 ℃.
In the method of the present invention, in the step (3), the decomposition is performed in a decomposing furnace at a decomposition temperature of 800 to 1000 ℃, specifically, for example, 800 ℃, 850 ℃, 900 ℃, 950 ℃ or 1000 ℃. The decomposition time is not particularly limited as long as the raw meal can reach the decomposition temperature. In a specific embodiment, the time of the decomposition is greater than 4.5 seconds.
In the method of the present invention, in the step (3), the calcination is performed in a rotary kiln at 1400 to 1700 ℃, specifically, 1400 ℃, 1500 ℃, 1550 ℃, 1600 ℃, 1650 ℃ or 1700 ℃ may be used, for example. The calcination time is not particularly limited as long as the raw meal can be brought to the calcination temperature. In a specific embodiment, the calcination time is greater than 15 minutes.
In another aspect, the invention provides Portland cement clinker prepared by the method.
In the invention, the ground raw materials can fully react in the system to generate heat and carbon monoxide due to proper granularity. When entering the first stage of the preheater system, the raw meal is mixed with high-temperature gas, and part of the gas slag is combusted to release heat, so that the gas temperature of the preheater is increased, and the energy consumption of the system is reduced. The rest of the gas slag is continuously combusted in each cyclone barrel and the decomposing furnace, and a large amount of carbon monoxide is generated in the preheater under the condition of insufficient oxygen so as to enable the whole system to form a reducing atmosphere, and the gas slag is continuously reacted with nitrogen oxides in flue gas from the kiln and the furnace to generate nitrogen under the condition of no catalyst in the process of descending the gas slag, so that the emission of the nitrogen oxides is reduced.
According to the invention, the industrial waste residue, namely the gas slag, is ingeniously combined with the calcined nitrogen oxide of the Portland cement, so that the industrial waste residue is consumed by taking the gas slag as the cement raw material, and the gas slag is added, so that the characteristic of high residual carbon content of the gas slag is utilized, the system temperature can be increased during combustion, the system energy consumption can be reduced, the discharge amount of the calcined nitrogen oxide of the Portland cement can be effectively reduced, waste is changed into valuables, the energy consumption is reduced, the discharge of the nitrogen oxide is reduced, and the environment is protected.
The present invention will be described in detail by way of examples, but the scope of the present invention is not limited thereto.
Example 1
Taking coal gas slag with the water content of 70 percent and the addition amount of 6 percent, mixing the coal gas slag with the calcium carbide wet slag and drying; taking the dried mixture of the gas slag and the carbide slag and other auxiliary materials according to the mass ratio of 1:0.2 grinding, wherein the mass ratio of the silicon waste stone to the fly ash to the converter slag to the copper slag is 3:9:3:1, a step of; the raw material with the fineness of 18 percent is orderly preheated at 540 ℃, decomposed at 900 ℃ and calcined at 1500 ℃ to obtain cement clinker A1.
Example 2
Taking coal gas slag with the water content of 68% and the addition amount of 3%, mixing with calcium carbide wet slag and drying; taking the dried mixture of the gas slag and the carbide slag and other auxiliary materials according to the mass ratio of 1:0.2 grinding, wherein the mass ratio of the silicon waste stone to the fly ash to the converter slag to the copper slag is 4:8:3:1, a step of; the raw material with the fineness of 16 percent is sequentially preheated at 560 ℃, decomposed at 1000 ℃ and calcined at 1400 ℃ to obtain cement clinker A2.
Example 3
Taking coal gas slag with the water content of 75 percent and the addition amount of 7 percent, mixing the coal gas slag with the calcium carbide wet slag and drying; taking the dried mixture of the gas slag and the carbide slag and other auxiliary materials according to the mass ratio of 1:0.3 grinding, wherein the mass ratio of the silicon waste stone to the fly ash to the converter slag to the copper slag is 3:8:4:1, a step of; the raw material with the fineness of 20 percent is sequentially preheated at 580 ℃, decomposed at 900 ℃ and calcined at 1600 ℃ to obtain cement clinker A3.
Example 4
Taking gas slag with water content of 60% and adding 8%, mixing with wet calcium carbide slag, and drying; taking the dried mixture of the gas slag and the carbide slag and other auxiliary materials according to the mass ratio of 1:0.5 grinding, wherein the mass ratio of the silicon waste stone to the fly ash to the converter slag to the copper slag is 2:10:2:1, a step of; the raw material with the fineness of 17 percent is sequentially preheated at 600 ℃, decomposed at 900 ℃ and calcined at 1650 ℃ to obtain cement clinker A4.
Example 5
Taking gas slag with the water content of 60 percent and the addition amount of 9 percent, mixing the gas slag with the calcium carbide wet slag and drying; taking the dried mixture of the gas slag and the carbide slag and other auxiliary materials according to the mass ratio of 1:0.1 grinding, wherein the mass ratio of the silicon waste stone to the fly ash to the converter slag to the copper slag is 4:5:4:1, a step of; the raw material with the fineness of 19 percent is sequentially preheated at 500 ℃, decomposed at 800 ℃ and calcined at 1700 ℃ to obtain cement clinker A5.
Example 6
Cement clinker A6 was prepared in the same manner as in example 1, except that the addition amount of the gas slag was 1%.
Comparative example 1
In contrast to cement clinker D1, which was prepared in the same manner as in example 1, no gas slag was added in this comparative example, and the amount of gas slag added was replaced by the dried carbide slag.
Test case
The nitrogen oxide emission concentrations of examples 1-6 and comparative example 1 were measured as described in HJ/T76-2007 and the results are shown in Table 1:
TABLE 1
As can be seen from the results in table 1, the cement clinker prepared by the method of the present invention has significantly reduced emission concentration of calcined nitrogen oxides, and has significantly improved effect, compared with cement clinker prepared from raw materials without gas slag.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, a number of simple variants of the technical solution of the invention are possible, including combinations of the individual technical features in any other suitable way, which simple variants and combinations should likewise be regarded as being disclosed by the invention, all falling within the scope of protection of the invention.
Claims (4)
1. A method for preparing silicate cement clinker, which is characterized by comprising the following steps:
(1) Mixing the water-containing gas slag and the calcium carbide wet slag and drying;
(2) Mixing the dried mixture obtained in the step (1) with other auxiliary materials, and grinding to obtain raw materials;
(3) Sequentially homogenizing, preheating, decomposing and calcining the raw material obtained in the step (2) to obtain cement clinker;
wherein in the step (1), the amount of the water-containing gas slag is 2-10 wt% based on 100% of the total weight of the water-containing gas slag and the calcium carbide wet slag; in the step (2), the raw material passes through an 80-micrometer square hole sieve, and the percentage of the screen residue is 16-20%;
in step (1), the water content of the water-containing gas-slag is 60-75 wt%;
the preheating is carried out in a rotary kiln preheater, and the preheating temperature is 500-600 ℃;
the decomposition is carried out in a decomposing furnace, and the decomposition temperature is 800-1000 ℃;
the calcination is carried out in a rotary kiln, and the calcination temperature is 1400-1700 ℃;
in the step (2), the other auxiliary materials contain silicon waste stone, fly ash, converter slag and copper slag, and the mass ratio of the silicon waste stone to the fly ash to the converter slag to the copper slag is (1-5) to (1-20) to (1-5) to 1.
2. The method for preparing Portland cement clinker according to claim 1, wherein in the step (2), the mass ratio of the dried mixture to other auxiliary materials is 1: (0.05-1).
3. The method of producing portland cement clinker according to claim 1, wherein in step (2), the grinding treatment is performed in a medium-discharge type drying mill.
4. Portland cement clinker prepared by the method according to any one of claims 1-3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010287170.8A CN113526882B (en) | 2020-04-13 | 2020-04-13 | Portland cement clinker and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010287170.8A CN113526882B (en) | 2020-04-13 | 2020-04-13 | Portland cement clinker and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113526882A CN113526882A (en) | 2021-10-22 |
| CN113526882B true CN113526882B (en) | 2023-10-03 |
Family
ID=78087928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010287170.8A Active CN113526882B (en) | 2020-04-13 | 2020-04-13 | Portland cement clinker and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113526882B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114656173A (en) * | 2022-03-03 | 2022-06-24 | 冀东水泥(烟台)有限责任公司 | Method for producing cement clinker by using gasified slag |
| CN116573869B (en) * | 2023-05-26 | 2024-05-28 | 安徽建筑大学 | Method for producing cement clinker by using slag waste |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1101786A (en) * | 1993-01-26 | 1995-04-19 | “霍尔德班克”财政家格拉卢斯有限公司 | Process for producing pig iron and cement clinker |
| CN101723610A (en) * | 2008-11-03 | 2010-06-09 | 成都建筑材料工业设计研究院有限公司 | Clinker method calcining cement clinker by using predecomposition technology of completely replacing calcareous raw material with wet type acetylene sludge |
| CN103664016A (en) * | 2013-11-09 | 2014-03-26 | 石家庄新华能源环保科技股份有限公司 | Method of producing cement through active coal gasification and rotary kiln device |
| CN107056100A (en) * | 2017-05-12 | 2017-08-18 | 神雾科技集团股份有限公司 | A kind of preparation method of clinker |
| CN107162447A (en) * | 2017-05-12 | 2017-09-15 | 神雾科技集团股份有限公司 | A kind of method that utilization carbide slag prepares clinker |
| CN108178536A (en) * | 2018-03-09 | 2018-06-19 | 湖南科技大学 | A kind of method that step calcination coal gas slugging prepares cement with little clinker |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5984599B2 (en) * | 2012-09-19 | 2016-09-06 | 太平洋セメント株式会社 | Method for producing cement composition |
-
2020
- 2020-04-13 CN CN202010287170.8A patent/CN113526882B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1101786A (en) * | 1993-01-26 | 1995-04-19 | “霍尔德班克”财政家格拉卢斯有限公司 | Process for producing pig iron and cement clinker |
| CN101723610A (en) * | 2008-11-03 | 2010-06-09 | 成都建筑材料工业设计研究院有限公司 | Clinker method calcining cement clinker by using predecomposition technology of completely replacing calcareous raw material with wet type acetylene sludge |
| CN103664016A (en) * | 2013-11-09 | 2014-03-26 | 石家庄新华能源环保科技股份有限公司 | Method of producing cement through active coal gasification and rotary kiln device |
| CN107056100A (en) * | 2017-05-12 | 2017-08-18 | 神雾科技集团股份有限公司 | A kind of preparation method of clinker |
| CN107162447A (en) * | 2017-05-12 | 2017-09-15 | 神雾科技集团股份有限公司 | A kind of method that utilization carbide slag prepares clinker |
| CN108178536A (en) * | 2018-03-09 | 2018-06-19 | 湖南科技大学 | A kind of method that step calcination coal gas slugging prepares cement with little clinker |
Non-Patent Citations (5)
| Title |
|---|
| "Structure characteristics and composition of hydration products of coal gasification slag mixed cement and lime";Zuzhong Li;《Construction and Building Materials》;20190720;第265-274页 * |
| "煤气化残渣的基本特性研究";赵永彬;《洁净煤技术》;20150331;第110-113+74页 * |
| "煤气化渣水泥稳定碎石基层材料性能研究";盛燕萍;《应用化工》;20200331;第2页第1段、第4页第1段、第5页第1段 * |
| 吕学涛."激发剂对煤气化渣微粉胶凝体系性能的影响研究".《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》.2020,(第第3期期),第B015-370页. * |
| 郑志侠."氮氧化物".《水泥行业污染物综合控制技术》.中国环境科学出版社,2015,第78-79页. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113526882A (en) | 2021-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107056102B (en) | System and method for producing sulphoaluminate cement and co-producing sulfur by utilizing desulfurized gypsum and aluminum ash | |
| CN104402270B (en) | A kind of high calcium fly-ash cement and preparation method thereof | |
| CN113526882B (en) | Portland cement clinker and preparation method thereof | |
| CN105712642B (en) | A kind of cement concrete efficient expansion clinker, its preparation method and its application | |
| CN113185154B (en) | Method for preparing cement clinker by using rare earth tailings | |
| CN112661424B (en) | Environment-friendly cement and preparation method thereof | |
| CN105110666B (en) | The method that the discarded object produced using calcium carbide prepares clinker | |
| CN111233353A (en) | Method for producing general cement clinker by using iron oxide slag to partially replace iron correction raw material | |
| CN112958587A (en) | Method and device for co-processing and utilizing aluminum ash and overhaul slag | |
| CN114409284A (en) | Low-carbon portland cement clinker taking tungsten tailings as raw material and preparation method thereof | |
| CN116332535A (en) | Method for producing active micro powder by cooperatively treating manganese slag by using fluidized bed furnace | |
| CN101775868B (en) | Method for sintering and curing industrial waste residue | |
| CN105621909B (en) | It is a kind of to mix modified Desulphurization and the cement of rice hull ash again | |
| CN102275992A (en) | Two-stage roasting method for chromite | |
| CN114349477A (en) | Detoxification formula with high chromium slag amount and process for producing synergistic light aggregate | |
| CN112028506B (en) | Method and system for co-production of sulphoaluminate-potassium magnesium phosphate composite gel material and sulphur | |
| CN112358207A (en) | Cement clinker doped with tailing slag and ash slag and preparation method thereof | |
| CN115286266B (en) | Carbon-negative clinker prepared from phosphogypsum and preparation method of carbon-negative clinker | |
| CN115650610A (en) | Masonry cement based on large-doped copper tailing and preparation method thereof | |
| CN110862240A (en) | Slag micro powder, admixture thereof, preparation method and application thereof, and cement and/or concrete | |
| CN109553316A (en) | It is a kind of using carbide slag and flyash as the complex cement of mixing material | |
| CN114409281A (en) | Method for producing cement clinker by using steel slag | |
| CN110986577A (en) | Method for cooperatively treating electrolytic manganese slag by using dry-process rotary kiln cement plant production line | |
| CN108191270B (en) | Method for preparing low clinker cement by using suspension roasting coal gasification slag | |
| CN112592079A (en) | Ariethialuminate cement and preparation method and application 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 |