CN112723765A - Green environment-friendly medium-alkali portland cement clinker and production process thereof - Google Patents
Green environment-friendly medium-alkali portland cement clinker and production process thereof Download PDFInfo
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- CN112723765A CN112723765A CN202110095349.8A CN202110095349A CN112723765A CN 112723765 A CN112723765 A CN 112723765A CN 202110095349 A CN202110095349 A CN 202110095349A CN 112723765 A CN112723765 A CN 112723765A
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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
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
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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
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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
-
- 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
- C04B7/44—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
- C04B7/44—Burning; Melting
- C04B7/4407—Treatment or selection of the fuel therefor, e.g. use of hazardous waste as secondary fuel ; Use of particular energy sources, e.g. waste hot gases from other processes
- C04B7/4423—Waste or refuse used as 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
- C04B7/47—Cooling ; Waste heat management
-
- 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)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Treatment Of Sludge (AREA)
Abstract
The invention discloses an environment-friendly medium-alkali Portland cement clinker. The environment-friendly medium-alkali Portland cement clinker is prepared by calcining a raw material, wherein the raw material comprises the following components in percentage by mass: 80-87% of medium-alkali limestone, 5.0-6.0% of coal gangue, 4.5-5.5% of iron ore dressing sludge, 3.5-4.5% of wet fly ash and 1.7-2.3% of silicon ore dressing sludge. The invention relates to the technical field of cement production, and particularly provides the environment-friendly medium-alkali Portland cement clinker which is smooth in production process, stable in quality and low in consumption of primary resources and a production process thereof. The medium-alkali Portland cement clinker is prepared from the iron ore dressing sludge and the silicon ore dressing sludge, so that the consumption of primary iron ores and primary silicon ores is reduced; the wet fly ash and the coal gangue are used for replacing clay for burdening, so that the consumption of the primary resources is reduced; and the medium-alkali Portland cement clinker has important significance for saving resources and protecting the environment, and is remarkable in social and economic benefits.
Description
Technical Field
The invention relates to the technical field of cement production, in particular to green environment-friendly medium-alkali portland cement clinker and a production process thereof.
Background
The cement is a cementing material which is prepared by mixing and grinding limestone, a silicon-aluminum material, an iron material and the like according to a certain proportion, then calcining the mixture at high temperature to form clinker, adding a mixed material, a retarder and other materials into the clinker, and grinding the clinker to a certain fineness. With the continuous development of the construction industry, the demand of cement is higher and higher.
At present, in the production process of cement, a large amount of primary iron ore, primary silicon ore and clay are consumed, and a large amount of primary resources are needed. In recent years, with the national call for green, environmental protection and energy saving, the green and environmental-friendly moderate alkali silicate cement clinker which has smooth production process, stable quality and small consumption of primary resources and the production process thereof need to be provided.
Disclosure of Invention
Aiming at the situation, in order to make up for the existing defects, the invention provides the green environment-friendly moderate alkali silicate cement clinker which has smooth production process, stable quality and small consumption of primary resources and the production process thereof.
The invention provides the following technical scheme: the invention relates to green environment-friendly medium-alkali portland cement clinker which is prepared by calcining a raw material, wherein the raw material comprises the following components in percentage by mass: 80-87% of medium-alkali limestone, 5.0-6.0% of coal gangue, 4.5-5.5% of iron ore selecting sludge, 3.5-4.5% of wet fly ash and 1.7-2.3% of silicon ore selecting sludge.
Preferably, the raw meal comprises the following components in mass ratio: 83.5 percent of medium-alkali limestone, 5.5 percent of coal gangue, 5.0 percent of sludge from iron ore dressing, 4.0 percent of wet fly ash and 2.0 percent of sludge from silicon ore dressing.
Further, the alkali content of the medium alkali limestone is 0.5% -0.6%.
A production process of green environment-friendly medium alkali portland cement clinker specifically comprises the following steps:
(1) weighing medium-alkali limestone, coal gangue, iron ore selecting sludge, wet fly ash and silica ore selecting sludge in corresponding parts by weight, carrying out raw material blending, and grinding the blended raw materials to obtain mixed raw materials;
(2) putting the mixed raw material into a rotary kiln, and calcining in the kiln;
(3) and (4) after the calcination is finished, quenching to 40-50 ℃ to obtain the medium-alkali silicate cement clinker, and conveying and warehousing.
Further, the calcination temperature is 1300-1400 ℃, and the calcination time is 50-100 min.
Furthermore, the ratio of the raw materials with the fineness of 0.08mm in the mixed raw material is less than or equal to 22.0 percent.
Furthermore, KH of the raw material is 1.01 +/-0.10, SM of the raw material is more than or equal to 2.7 +/-0.1, and IM of the raw material is less than or equal to 1.4 +/-0.1.
The invention with the structure has the following beneficial effects: the invention relates to a green environment-friendly medium-alkali portland cement clinker and a production process thereof, which have the following advantages:
(1) the iron ore dressing sludge and the silicon ore dressing sludge are used for proportioning, so that the consumption of primary iron ore and primary silicon ore is reduced, the method has important significance for saving resources and protecting the environment, and the social and economic benefits are obvious;
(2) the price of the iron ore selecting sludge and the silicon ore selecting sludge has obvious advantage compared with the price of primary iron ore and primary silicon ore, the batching cost can be reduced by 0.8 yuan/ton of clinker, and because the fineness of the iron ore selecting sludge and the silicon ore selecting sludge is very small, the grindability of raw materials can be improved, and the power consumption of raw material grinding is reduced by about 1.5 KWh/t;
(3) the iron ore dressing sludge and the silicon ore dressing sludge are powdery materials, have stable components and higher quality stability than the original iron ore, reduce the quality fluctuation of raw materials, improve the qualification rate of raw material indexes by about 5 percent, and improve the product quality of green environment-friendly portland cement clinker;
(4) the wet fly ash and the coal gangue are used for completely replacing clay for blending, so that the consumption of primary resources is reduced, the consumption of clay can be reduced by 10 ten thousand tons every year, and the comprehensive utilization of resources is realized;
(5) the green environment-friendly medium-alkali portland cement clinker manufactured by utilizing wet fly ash and coal gangue has more reasonable mineral composition, improved strength, meets the production requirement of high-compressive strength cement, improves the grindability and the burnability of raw materials, improves the yield of a kiln by about 5 percent, reduces the power consumption of a grinder by about 5 percent, and achieves the aim of reducing the power consumption. The wet fly ash and the coal gangue contain a certain amount of heat value, the clinker can be reduced by 1.5 kg/ton compared with the standard coal consumption according to the detection of the energy consumption limit of a unit cement product of national standard GB 16780-;
(6) after the wet fly ash, the coal gangue, the iron ore dressing sludge and the silicon ore dressing sludge are comprehensively utilized, the land occupation is reduced, the environmental pollution is reduced, and great social benefit and economic benefit are generated.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 of the 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 green environment-friendly medium-alkali portland cement clinker is prepared by calcining a raw material, wherein the raw material comprises the following components in percentage by mass: 83.5% of medium-alkali limestone, 5.5% of coal gangue, 5.0% of iron ore dressing sludge, 4.0% of wet fly ash and 2.0% of silicon ore dressing sludge, wherein the alkali content of the medium-alkali limestone is 0.5% -0.6%.
A production process of green environment-friendly medium alkali portland cement clinker specifically comprises the following steps:
(1) weighing medium-alkali limestone, coal gangue, iron ore selecting sludge, wet fly ash and silica ore selecting sludge in corresponding parts by weight, carrying out raw material blending, and grinding the blended raw materials to obtain mixed raw materials;
(2) putting the mixed raw material into a rotary kiln, and calcining in the kiln;
(3) and (4) after the calcination is finished, quenching to 40-50 ℃ to obtain the medium-alkali silicate cement clinker, and conveying and warehousing.
Wherein the calcining temperature is 1300-1400 ℃, and the calcining time is 50-100 min.
The ratio of the raw materials with the fineness of 0.08mm in the mixed raw material is less than or equal to 22.0 percent.
KH of the raw material is 1.01 +/-0.10, SM of the raw material is more than or equal to 2.7 +/-0.1, and IM of the raw material is less than or equal to 1.4 +/-0.1.
Example 2:
the green environment-friendly medium-alkali portland cement clinker is prepared by calcining a raw material, wherein the raw material comprises the following components in percentage by mass: 80% of medium-alkali limestone, 5.0% of coal gangue, 4.5% of iron ore dressing sludge, 3.5% of wet fly ash and 1.7% of silicon ore dressing sludge, wherein the alkali content of the medium-alkali limestone is 0.5% -0.6%.
A production process of green environment-friendly medium alkali portland cement clinker specifically comprises the following steps:
(1) weighing medium-alkali limestone, coal gangue, iron ore selecting sludge, wet fly ash and silica ore selecting sludge in corresponding parts by weight, carrying out raw material blending, and grinding the blended raw materials to obtain mixed raw materials;
(2) putting the mixed raw material into a rotary kiln, and calcining in the kiln;
(3) and (4) after the calcination is finished, quenching to 40-50 ℃ to obtain the medium-alkali silicate cement clinker, and conveying and warehousing.
Wherein the calcining temperature is 1300-1400 ℃, and the calcining time is 50-100 min. The ratio of the raw materials with the fineness of 0.08mm in the mixed raw material is less than or equal to 22.0 percent. KH of the raw material is 1.01 +/-0.10, SM of the raw material is more than or equal to 2.7 +/-0.1, and IM of the raw material is less than or equal to 1.4 +/-0.1.
Example 3:
the green environment-friendly medium-alkali portland cement clinker is prepared by calcining a raw material, wherein the raw material comprises the following components in percentage by mass: 87% of medium-alkali limestone, 6.0% of coal gangue, 5.5% of iron ore dressing sludge, 4.5% of wet fly ash and 2.3% of silicon ore dressing sludge, wherein the alkali content of the medium-alkali limestone is 0.5% -0.6%.
A production process of green environment-friendly medium alkali portland cement clinker specifically comprises the following steps:
(1) weighing medium-alkali limestone, coal gangue, iron ore selecting sludge, wet fly ash and silica ore selecting sludge in corresponding parts by weight, carrying out raw material blending, and grinding the blended raw materials to obtain mixed raw materials;
(2) putting the mixed raw material into a rotary kiln, and calcining in the kiln;
(3) and (4) after the calcination is finished, quenching to 40-50 ℃ to obtain the medium-alkali silicate cement clinker, and conveying and warehousing.
Wherein the calcining temperature is 1300-1400 ℃, and the calcining time is 50-100 min. The ratio of the raw materials with the fineness of 0.08mm in the mixed raw material is less than or equal to 22.0 percent. KH of the raw material is 1.01 +/-0.10, SM of the raw material is more than or equal to 2.7 +/-0.1, and IM of the raw material is less than or equal to 1.4 +/-0.1.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The green environment-friendly medium-alkali portland cement clinker is characterized by being prepared by calcining raw materials, wherein the raw materials comprise the following components in percentage by mass: 80-87% of medium-alkali limestone, 5.0-6.0% of coal gangue, 4.5-5.5% of iron ore selecting sludge, 3.5-4.5% of wet fly ash and 1.7-2.3% of silicon ore selecting sludge.
2. The green environment-friendly moderate alkali portland cement clinker as claimed in claim 1, wherein the raw meal comprises the following components in parts by mass: 83.5 percent of medium-alkali limestone, 5.5 percent of coal gangue, 5.0 percent of sludge from iron ore dressing, 4.0 percent of wet fly ash and 2.0 percent of sludge from silicon ore dressing.
3. The green and environment-friendly medium alkali silicate cement clinker as claimed in claim 1, wherein the alkali content of the medium alkali limestone is in the range of 0.5-0.6%.
4. A production process of green environment-friendly medium alkali portland cement clinker is characterized by comprising the following steps:
(1) weighing medium-alkali limestone, coal gangue, iron ore selecting sludge, wet fly ash and silica ore selecting sludge in corresponding parts by weight, carrying out raw material blending, and grinding the blended raw materials to obtain mixed raw materials;
(2) putting the mixed raw material into a rotary kiln, and calcining in the kiln;
(3) and (4) after the calcination is finished, quenching to 40-50 ℃ to obtain the medium-alkali silicate cement clinker, and conveying and warehousing.
5. The production process of the green environment-friendly medium alkali silicate cement clinker as claimed in claim 4, wherein the supporting plate is provided with a plurality of groups along the inner side wall of the filtering box along the height direction, the length of the plurality of groups of supporting plates is sequentially increased from top to bottom, the supporting plate is provided with a plurality of groups along the height direction of the filtering box, the length of the plurality of groups of supporting plates is sequentially decreased from top to bottom, and the supporting plates are correspondingly arranged with the supporting plates.
6. The production process of the green environment-friendly medium alkali silicate cement clinker as claimed in claim 4, wherein the raw material with fineness of 0.08mm in the mixed raw material accounts for less than or equal to 22.0%.
7. The process for producing green and environment-friendly medium alkali portland cement clinker according to claim 4, wherein KH of the raw meal is 1.01 ± 0.10, SM of the raw meal is 2.7 ± 0.1 or more, and IM of the raw meal is 1.4 ± 0.1 or less.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110095349.8A CN112723765A (en) | 2021-01-25 | 2021-01-25 | Green environment-friendly medium-alkali portland cement clinker and production process thereof |
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| CN202110095349.8A CN112723765A (en) | 2021-01-25 | 2021-01-25 | Green environment-friendly medium-alkali portland cement clinker and production process thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113307515A (en) * | 2021-07-16 | 2021-08-27 | 中材萍乡水泥有限公司 | Portland cement clinker produced by using municipal sludge and process thereof |
| CN115196892A (en) * | 2022-04-11 | 2022-10-18 | 包书红 | Green environment-friendly medium-alkali portland cement clinker and production process thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113307515A (en) * | 2021-07-16 | 2021-08-27 | 中材萍乡水泥有限公司 | Portland cement clinker produced by using municipal sludge and process thereof |
| CN115196892A (en) * | 2022-04-11 | 2022-10-18 | 包书红 | Green environment-friendly medium-alkali portland cement clinker and production process thereof |
| CN115196892B (en) * | 2022-04-11 | 2023-11-24 | 广德独山南方水泥有限公司 | Environment-friendly medium alkali silicate cement clinker and production process thereof |
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Application publication date: 20210430 |