CN110550874A - Batching method for preparing portland cement clinker by low-emission full-industrial waste residues - Google Patents
Batching method for preparing portland cement clinker by low-emission full-industrial waste residues Download PDFInfo
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- CN110550874A CN110550874A CN201910612726.3A CN201910612726A CN110550874A CN 110550874 A CN110550874 A CN 110550874A CN 201910612726 A CN201910612726 A CN 201910612726A CN 110550874 A CN110550874 A CN 110550874A
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- slag
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- cement clinker
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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
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
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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
Abstract
The invention discloses a batching method for preparing portland cement clinker by using low-emission full-industrial waste residues, wherein the clinker is composed of the following raw materials in parts by weight: 7-13 parts of fly ash, 3-8 parts of furnace slag, 8-15 parts of lime powder, 1-7 parts of copper slag, 2-9 parts of steel slag, 55-68 parts of carbide slag and 4-10 parts of silicon powder. The method has low carbon dioxide emission, can effectively solve the problems of various solid wastes generated in the chlor-alkali industry, silicon powder pollution generated in the polysilicon industry and the like, and is a novel industrial waste residue utilization technology with social benefit, economic benefit and environmental protection benefit.
Description
Technical Field
The invention belongs to the field of building materials, and relates to a batching method for preparing portland cement clinker by using low-emission full-industrial waste residues.
Background
A series of polyvinyl chloride circular economy industrial chains with regional characteristics, including thermal power plants, calcium carbide plants, acetylene plants and chemical plants, are formed by mainly adopting a calcium carbide process in western regions of China and combining regional resource characteristics, and a large amount of solid wastes, mainly comprising fly ash, furnace slag, carbide slag, lime powder and the like, are generated while huge economic benefits are formed, and serious pollution is caused to the atmosphere, soil and underground water due to long-term outdoor stacking. With the national environmental protection importance, the transformation and upgrading of the high-energy-consumption and high-emission industry become more and more urgent.
At present, the dry acetylene technology is mature day by day, the produced carbide slag contains about 10 percent of water, and the water-saving effect is obvious. The low water content of the carbide slag creates conditions for developing a cement dry production line made from the carbide slag, and at present, many enterprises in China have already carried out construction and production operation, but the corresponding technical problems of low utilization rate of the waste slag, low cement strength, large shrinkage, large water absorption, high carbon dioxide emission amount which is easy to crack and the like exist.
Disclosure of Invention
Aiming at the technical defects and the requirement of industrial transformation and upgrading, the existing calcium carbide method polyvinyl chloride circular economy industrial chain is combined, and a batching method for preparing portland cement clinker by using low-emission full industrial waste residues is provided, wherein the cement clinker is composed of the following raw materials in parts by weight: 7-13 parts of fly ash, 3-8 parts of furnace slag, 8-15 parts of lime powder, 2-7 parts of copper slag, 4-9 parts of steel slag, 55-68 parts of carbide slag and 4-10 parts of silicon powder.
As the optimized material ratio, the method for preparing the portland cement by using the low-emission full-industrial waste residue comprises the following raw materials in percentage by weight: 8-11 parts of fly ash, 4-6 parts of furnace slag, 10-13 parts of lime powder, 3-6 parts of copper slag, 5-8 parts of steel slag, 58-65 parts of carbide slag and 5-8 parts of silicon powder.
The batching method for preparing the portland cement clinker by using the low-emission full-industrial waste residues comprises the following specific steps of:
1) Mixing raw materials: sequentially drying and grinding the fly ash, the furnace slag, the lime powder, the copper slag and the steel slag according to the mass ratio, mixing the fly ash, the furnace slag, the lime powder, the copper slag and the steel slag with the silicon powder and the carbide slag to form a raw material, and feeding the raw material into a raw material homogenizing warehouse;
2) Preheating, decomposing and calcining the raw materials obtained in the step 1) in sequence to obtain the cement clinker.
As mentioned above, the raw material passing through the raw material homogenizing warehouse in the step 2) is sent into the secondary uptake flue of the preheater through the hoister, enters the primary cyclone after being preheated, then falls into the tertiary uptake flue of the preheater, enters the secondary cyclone after heat exchange for gas-solid separation, finally falls into the smoke chamber through the five-stage cyclone for heating again before solid-phase chemical reaction, then slides into the rotary kiln, and generates cement clinker after passing through the reaction zone and the calcining zone.
As mentioned above, the silicon slag powder and the dried carbide slag are mixed according to the mass ratio and then enter the powder selecting machine of the grinding system.
As mentioned above, the outlet temperature of the primary cyclone is 450-550 ℃.
as mentioned above, the silicon powder and the fly ash are not directly fed into the mill, and are mixed with the dry carbide slag dried by the drying tube according to the mass ratio, and then directly fed into the powder concentrator of the grinding system.
As mentioned above, the carbide slag enters the raw material warehouse after being preheated and dried by the smoke of the calcining kiln.
As mentioned above, the mass ratio of the dried carbide slag to the dried fly ash is controlled to be 5.5-9.0, and the optimal ratio is 6.3-7.2.
As mentioned above, the mass ratio of the slag to the carbide slag and the lime powder is controlled to be 0.57-0.88, and the optimal ratio is 0.62-0.69.
As mentioned above, the mass ratio of the copper slag and the steel slag to the carbide slag and the lime powder is controlled to be 0.80-2.10, and the optimal ratio is 1.13-1.64.
As mentioned above, the outlet flue of the primary cyclone of the rotary kiln system is directly connected with the drying pipe, and the drying pipe is connected with the carbide slag conveying end of the raw material system and used for drying the carbide slag.
Due to the adoption of the scheme of the invention, the invention has the beneficial effects that:
(1) Because the raw materials are all low-loss-on-ignition components, the process has low carbon dioxide emission.
(2) the raw materials of the process adopt industrial waste residues as raw materials, mainly comprise lime powder generated by a calcium carbide plant, carbide slag generated by an acetylene plant, fly ash and slag generated by a thermal power plant, copper slag generated by a sulfuric acid plant, steel slag generated by a steel mill and silicon powder generated by a polysilicon company, and the problem of pollution caused by a large amount of solid wastes is solved.
Detailed Description
Example 1
Firstly, 8 parts of fly ash, 4 parts of slag, 9 parts of lime powder, 8 parts of silicon powder, 4 parts of copper slag and 7 parts of steel slag are proportioned according to weight proportion and then sent into a drying middle unloading mill to be ground into fine powder, then the fine powder and 60 parts of dried carbide slag with 10% of water content enter a powder selecting machine, after screening, unqualified coarse powder returns to the middle unloading mill to be ground, qualified mixed waste slag enters a raw material homogenizing warehouse, when the temperature of the raw material is 90 ℃, the raw material is sent into a secondary ascending flue of a preheater through a lifter, the raw material enters a primary cyclone after being preheated and then falls into a tertiary ascending flue of the preheater, after heat exchange, the raw material enters a secondary cyclone to be subjected to gas-solid separation, and finally falls into a smoke chamber through a five-stage cyclone to be subjected to primary heating and temperature rise before solid-phase chemical reaction, and then slides into a rotary kiln, and cement clinker is generated through a reaction zone and.
Example 2
Firstly, 11 parts of fly ash, 5 parts of slag, 12 parts of lime powder, 8 parts of silicon powder, 1.5 parts of copper slag and 2.5 parts of steel slag are proportioned according to weight proportion and then sent into a drying middle discharge mill to be ground into fine powder, then the fine powder and the dried carbide slag 60 with the water content of 10 percent enter a powder selecting machine, after screening, unqualified coarse powder returns to the middle discharge mill to be ground, the qualified mixed waste slag enters a raw material homogenizing warehouse, when the temperature of the raw material is 90 ℃, the raw material is sent into a secondary ascending flue of a preheater through a lifter, the raw material enters a primary cyclone cylinder after being preheated, then falls into a tertiary ascending flue of the preheater, enters a secondary cyclone cylinder after heat exchange to carry out gas-solid separation, finally falls into a smoke chamber through the five-stage cyclone cylinder to carry out primary heating and temperature rise before carrying out solid-phase chemical reaction, then slides into a rotary kiln, and cement clinker is generated through a reaction zone and a calcining zone.
Example 3
Firstly, 9 parts of fly ash, 4 parts of slag, 11 parts of lime powder, 7 parts of silicon powder, 1.5 parts of copper slag and 2.5 parts of steel slag are proportioned according to weight proportion and then sent into a drying middle discharge mill to be ground into fine powder, then the fine powder and the dried carbide slag 65 with the water content of 10 percent enter a powder selecting machine, after screening, unqualified coarse powder returns to the middle discharge mill to be ground, qualified mixed waste slag enters a raw material homogenizing warehouse, when the temperature of the raw material is 90 ℃, the raw material is sent into a secondary ascending flue of a preheater through a lifter, the raw material enters a primary cyclone cylinder after being preheated, then falls into a tertiary ascending flue of the preheater, enters a secondary cyclone cylinder after heat exchange to carry out gas-solid separation, finally falls into a smoke chamber through the five-stage cyclone cylinder to carry out primary heating and temperature rise before carrying out solid-phase chemical reaction, then slides into a rotary kiln, and cement clinker is generated through a reaction zone and a calcining zone at.
Example 4
Firstly, 8 parts of fly ash, 5 parts of slag, 8 parts of lime powder, 7 parts of silicon powder, 2 parts of copper slag and 2 parts of steel slag are proportioned according to weight proportion and then sent into a drying middle discharge mill to be ground into fine powder, then the fine powder and the dried carbide slag 68 with the water content of 10% enter a powder selecting machine, after screening, unqualified coarse powder returns to the middle discharge mill to be ground, qualified mixed waste slag enters a raw material homogenizing warehouse, when the temperature of the raw material is 90 ℃, the raw material is sent into a secondary ascending flue of a preheater through a lifting machine, the raw material is preheated and then enters a primary cyclone, then falls into a tertiary ascending flue of the preheater, after heat exchange, the raw material enters a secondary cyclone to carry out gas-solid separation, finally falls into a smoke chamber through a five-stage cyclone to carry out primary heating and temperature rise before carrying out solid-phase chemical reaction, then slides into a rotary kiln, and generates cement clinker through a reaction zone and a calcining.
Example 5
Firstly, 7 parts of fly ash, 3 parts of furnace slag, 8 parts of lime powder, 5 parts of silicon powder, 6 parts of copper slag and 5 parts of steel slag are proportioned according to weight proportion and then sent into a drying middle unloading mill to be ground into fine powder, then the fine powder and the dried carbide slag 66 with the water content of 10% enter a powder selecting machine, after screening, unqualified coarse powder returns to the middle unloading mill to be ground, qualified mixed waste slag enters a raw material homogenizing warehouse, when the temperature of the raw material is 90 ℃, the raw material is sent into a secondary ascending flue of a preheater through a lifter, the raw material is preheated and then enters a primary cyclone, then falls into a tertiary ascending flue of the preheater, after heat exchange, the raw material enters a secondary cyclone to carry out gas-solid separation, finally falls into a smoke chamber through a five-stage cyclone to carry out primary heating and temperature rise before carrying out solid-phase chemical reaction, then slides into a rotary kiln, and generates cement clinker through a reaction zone and a calcining.
Example 6
Firstly, 12 parts of fly ash, 6 parts of slag, 13 parts of lime powder, 4 parts of silicon powder, 1 part of copper slag and 2 parts of steel slag are proportioned according to weight proportion and then sent into a drying middle discharge mill to be ground into fine powder, then the fine powder and the dried carbide slag 62 with the water content of 10 percent enter a powder selecting machine, after screening, unqualified coarse powder returns to the middle discharge mill to be ground, qualified mixed waste slag enters a raw material homogenizing warehouse, when the temperature of the raw material is 90 ℃, the raw material is sent into a secondary ascending flue of a preheater through a lifter, the raw material is preheated and then enters a primary cyclone, then falls into a tertiary ascending flue of the preheater, after heat exchange, the raw material enters a secondary cyclone to be subjected to gas-solid separation, finally falls into a smoke chamber through a five-stage cyclone to be subjected to primary heating and temperature rise before solid-phase chemical reaction, then slides into a rotary kiln, and cement clinker is generated through a reaction zone and a calcining.
Example 7
Firstly, 13 parts of fly ash, 8 parts of slag, 10 parts of lime powder, 4 parts of silicon powder, 4 parts of copper slag and 5 parts of steel slag are proportioned according to weight proportion and then sent into a drying middle discharge mill to be ground into fine powder, then the fine powder and the dried carbide slag 56 with the water content of 10% enter a powder selecting machine, after screening, unqualified coarse powder returns to the middle discharge mill to be ground, qualified mixed waste slag enters a raw material homogenizing warehouse, when the temperature of the raw material is 90 ℃, the raw material is sent into a secondary ascending flue of a preheater through a lifting machine, the raw material is preheated and then enters a primary cyclone, then falls into a tertiary ascending flue of the preheater, after heat exchange, the raw material enters a secondary cyclone to carry out gas-solid separation, finally falls into a smoke chamber through a five-stage cyclone to carry out primary heating and temperature rise before carrying out solid-phase chemical reaction, then slides into a rotary kiln, and generates cement clinker through a reaction zone and a calcining.
table 1 shows the chemical composition, specific value and physical strength data of the experimental clinker of examples 1-7
Claims (8)
1. A batching method for preparing portland cement clinker by using low-emission full-industrial waste residues is characterized by comprising the following steps:
Mixing raw materials: the method comprises the following steps of sequentially drying and grinding fly ash, furnace slag, lime powder, copper slag and steel slag according to a mass ratio, mixing the ground fly ash, the furnace slag, the lime powder, the copper slag and the steel slag with silicon powder and carbide slag to form a raw material, and feeding the raw material into a raw material homogenizing warehouse, wherein the dried components are added in parts by mass: 7-13 parts of fly ash, 3-8 parts of furnace slag, 8-15 parts of lime powder, 2-7 parts of copper slag, 4-9 parts of steel slag, 55-68 parts of carbide slag and 4-10 parts of silicon powder;
Preheating, decomposing and calcining the raw materials obtained in the step 1) in sequence to obtain the cement clinker.
2. The method as claimed in claim 1, wherein the raw material of step 2) is fed into the secondary uptake flue of the preheater by the elevator, and the raw material is preheated and then fed into the primary cyclone, and then fed into the tertiary uptake flue of the preheater, and then fed into the secondary cyclone for gas-solid separation after heat exchange, and finally fed into the smoke chamber via the five-stage cyclone for solid-phase chemical reaction, and then fed into the rotary kiln, and finally, the cement clinker is produced after passing through the reaction zone and the calcining zone.
3. The method for preparing portland cement clinker from low-emission full-industrial waste residues as recited in claim 1, wherein the silica powder and fly ash are not directly fed into the mill, and are mixed with the dry carbide slag dried by the drying tube according to the mass ratio, and then directly fed into the powder concentrator of the grinding system.
4. The method for preparing portland cement clinker from low-emission total industrial waste residues as recited in claim 1, wherein the carbide slag is preheated and dried by flue gas from a calcining kiln and then enters a raw material warehouse.
5. The method as claimed in claim 2, wherein the outlet temperature of the primary cyclone is 450-550 ℃.
6. The blending method for preparing portland cement clinker by using low-emission full-industrial waste residues as claimed in claim 1, wherein the mass ratio of the dried carbide slag to the dried fly ash is controlled to be 5.5-9.0, and the optimal ratio is 6.3-7.2.
7. The method for preparing portland cement clinker from low-emission total industrial waste residues as recited in claim 1, wherein the mass ratio of the slag to the carbide slag and the lime powder is controlled to be 0.57-0.88, and the optimal ratio is 0.62-0.69.
8. The blending method of the low-emission full-industrial waste slag portland cement clinker as claimed in claim 1, wherein the mass ratio of the copper slag and the steel slag to the carbide slag and the lime powder is controlled to be 0.80-2.10, and the optimal ratio is 1.13-1.64.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113024133A (en) * | 2021-02-03 | 2021-06-25 | 新疆阜康天山水泥有限责任公司 | Sulfate-resistant low-alkali portland cement and preparation method thereof |
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| CN101580347A (en) * | 2009-06-16 | 2009-11-18 | 南京师范大学 | Composite industrial residue mineralizer cement clinker and preparation method thereof |
| CN102249575A (en) * | 2011-05-09 | 2011-11-23 | 白银有色集团股份有限公司 | Application of waste tailing silicon powder from beneficiation as raw material for preparing portland cement |
| CN102351444A (en) * | 2011-07-21 | 2012-02-15 | 新疆天业（集团）有限公司 | Method for producing high grade cement clinker from full waste residues through rapidly calcining at low temperature |
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- 2019-07-09 CN CN201910612726.3A patent/CN110550874A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20080013365A (en) * | 2006-08-08 | 2008-02-13 | 카운슬 오브 사이언티픽 앤드 인더스트리얼 리서치 | An improved process for the production of portland slag cement using granulated blast furnace slag |
| CN101580347A (en) * | 2009-06-16 | 2009-11-18 | 南京师范大学 | Composite industrial residue mineralizer cement clinker and preparation method thereof |
| CN102249575A (en) * | 2011-05-09 | 2011-11-23 | 白银有色集团股份有限公司 | Application of waste tailing silicon powder from beneficiation as raw material for preparing portland cement |
| CN102351444A (en) * | 2011-07-21 | 2012-02-15 | 新疆天业（集团）有限公司 | Method for producing high grade cement clinker from full waste residues through rapidly calcining at low temperature |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113024133A (en) * | 2021-02-03 | 2021-06-25 | 新疆阜康天山水泥有限责任公司 | Sulfate-resistant low-alkali portland cement and preparation method thereof |
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Application publication date: 20191210 |