CN106966619B - A kind of fluidized bed combustion coal ash/slag cement and preparation method thereof - Google Patents
A kind of fluidized bed combustion coal ash/slag cement and preparation method thereof Download PDFInfo
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- CN106966619B CN106966619B CN201710364428.8A CN201710364428A CN106966619B CN 106966619 B CN106966619 B CN 106966619B CN 201710364428 A CN201710364428 A CN 201710364428A CN 106966619 B CN106966619 B CN 106966619B
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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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- 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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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
It is utilized the present invention relates to the solid waste that circulating fluidized-bed combustion boiler generates and cement cementitious material field, is specifically to provide a kind of fluidized bed combustion coal ash/slag cement and preparation method thereof.The purpose of the present invention is pass through effective technological means, realize that the solid sulfur ash, CFB residues and the desulfurized gypsum that generate in thermal power generation utilize maximization in cement, play the physical and chemical comprehensive effect of each material component, it develops one kind and meets existing national standards, the fluidized bed combustion coal ash/slag cement and preparation method thereof with broad mass market prospect.A kind of fluidized bed combustion coal ash/slag cement of the present invention, the component including following mass percent: solid sulfur ash powder 35~50, CFB residues powder 17~28, Portland clinker powder 25~37, desulfurization gypsum powder 2~3, wherein the specific surface area of solid sulfur ash powder is not less than 1000m2/ kg, it is 15%~17% that 45 μm of square hole screens of fineness of CFB residues powder, which tail over value,.
Description
Technical field
The present invention relates to circulating fluidized-bed combustion boiler generate solid waste utilize and cement cementitious material field, specifically
It is to provide a kind of fluidized bed combustion coal ash/slag cement and preparation method thereof.
Background technique
With growing, thermal power generation corporations' trend pickup of Electricity Demand, especially using coal as base
Northern province, it is more as the operation quantity of the circulating fluidized bed boiler generating set of fuel using colm and gangue, thus produce
The solid wastes such as raw solid sulfur ash, CFB residues and desulfurized gypsum increase year by year.However, due to the limitation by current scientific research technology, this
The resource utilization level of class solid waste is lower, still based on outdoor stockpiling or landfill.Transport, the storage of solid waste, on the one hand
The production cost for increasing electric power enterprise brings biggish pressure to enterprise production and management；On the other hand, to local soil
The generations such as ground, air, water source pollution.Therefore, the solid wastes such as solid sulfur ash, CFB residues and desulfurized gypsum are efficiently utilized by technological means
The demand of object is more urgent.
The flyash that thermal power plant's coal dust boiler flue is collected is as one of manufacture of cement active addition, rationally
Incorporation can suitably improve cement performance, for example good water-retaining property, later strength are high, the heat of hydration is low etc., are conducive to expand cement
Use scope.Therefore, flyash has been widely used in manufacture of cement at present.
To the fluidized bed combustion coal ash/slag that circulating fluidized bed boiler operation generates, due to lower by fuel quality, desulfuration in furnace, furnace temperature
There are biggish difference, main tables for the flyash that a variety of influences of equal boiler operatiopns technique, physicochemical property and coal-powder boiler generate
It is now big water requirement, self-hardening property and late expansion etc.；Therefore, using existing utilization of fly ash technology, it is difficult to make it in cement
Have in production and applies in large quantities.It, by the same token, at present not yet can be to the clinker of circulating fluidized bed boiler bottom part discharge
It is efficiently utilized in manufacture of cement.
Summary of the invention
The purpose of the present invention is by effective technological means, realize the solid sulfur ash generated in thermal power generation, CFB residues and
Desulfurized gypsum utilizing in cement maximizes, and plays the physical and chemical comprehensive effect of each material component, develops one kind and meet existing state
Family's standard, the fluidized bed combustion coal ash/slag cement and preparation method thereof with broad mass market prospect.
The technical solution that the present invention takes to achieve the above object are as follows:
A kind of fluidized bed combustion coal ash/slag cement, the component including following mass percent:
Solid sulfur ash powder 35~50, CFB residues powder 17~28, Portland clinker powder 25~37, desulfurization gypsum powder 2~3,
Wherein the specific surface area of solid sulfur ash powder is not less than 1000m2/ kg, 45 μm of square hole screens of fineness of CFB residues powder tail over value be 15%~
17%.
The preparation of solid sulfur ash the powder of the present invention are as follows: (GB/ " for the flyash in cement and concrete " will be met
T1596-2005) standard circulating fluidized bed boiler operation generate solid sulfur ash, with power plant's afterheat steam kinetic energy mill carry out it is levigate,
Specific surface area is not less than 1000m2/kg。
CFB residues powder, Portland clinker powder and desulfurization gypsum powder of the present invention can be prepared respectively, can also be by its original
Material is mixed with, specific as follows:
The preparation of the CFB residues powder: the CFB residues cement ball mill that circulating fluidized bed boiler operation is generated is levigate,
Its quality meets (GB/T1596-2005) standard " for the flyash in cement and concrete ", and 45 μm of square hole screens of fineness tail over
Controlling value is 15%~17%；
The preparation of the Portland clinker powder: the silicon of " common portland cement " (GB175-2007) standard will be met
Acid salt cement clinker, carried out with cement ball mill it is levigate, 45 μm of square hole screens of fineness tail over controlling value be 12%~15%；
The preparation of the desulfurization gypsum powder: the desulfurized gesso of flue gas by calcium sulphate content not less than 90% is dried at normal temperature
Afterwards, levigate with cement ball mill, it is 10%~14% that 45 μm of square hole screens of fineness, which tail over controlling value,；
The mixed powder preparation of the CFB residues, Portland clinker and desulfurized gypsum composition: by CFB residues, silicate
Clinker and desulfurized gypsum after weighing mixing respectively according to the material prescription for preparing cement, are made with cement ball mill is levigate,
It is 12%~16% that 45 μm of square hole screens of fineness of mixed powder, which tail over controlling value,.
A kind of preparation method of fluidized bed combustion coal ash/slag cement takes solid sulfur ash powder, CFB residues powder, silicate cement according to mass percent
Mud chamotte powder and desulfurization gypsum powder are uniformly mixed and are made.
Compared with the material prescription of existing pulverized fuel ash cement, according to cement prepared by material prescription of the present invention, not only performance
Meet quality index of the existing national standards in relation to PF42.5 cement, and the dosage of solid sulfur ash is larger, reachable 35%~
50%；Meanwhile the blank that CFB residues are mixed in domestic manufacture of cement has been filled up, dosage is up to 17%~28%；Consider desulfurization stone
The utilization of cream, solid waste utilization rate of the present invention is up to 63%~75%；Therefore, the present invention can be effectively reduced manufacture of cement at
This, realizes the extensive consumption of solid sulfur ash and CFB residues, has good society and economic benefit.
Specific embodiment
In embodiment, the production of instrument and equipment, temperature and humidity conditions, test specimen, the test side of PF42.5 cement of the present invention are examined
Method and performance rating standard are performed both by existing relevant national standard.
Embodiment 1
(1) preparation of solid sulfur ash powder: it will meet " for the flyash in cement and concrete " (GB/T1596-2005) and mark
Quasi- solid sulfur ash carries out levigate, specific surface area 1004m with power plant's afterheat steam kinetic energy mill2/kg。
(2) preparation of CFB residues powder: CFB residues cement ball mill is levigate, and quality meets " for cement and coagulation
Flyash in soil " (GB/T1596-2005) standard, fineness (45 μm of square hole screens tail over) is 16.7%.
(3) silicon of " common portland cement " (GB175-2007) standard the preparation of Portland clinker powder: will be met
Acid salt cement clinker, carried out with cement ball mill it is levigate, fineness (45 μm of square hole screens tail over) be 14.5%.
(4) preparation of desulfurization gypsum powder: after desulfurized gypsum is dried at normal temperature, fineness (45 levigate with cement ball mill
μm square hole screen tails over) it is 12.6%.
The preparation of PF42.5 cement: according to material utilization amount formula, solid sulfur ash powder 40；CFB residues powder 27；Portland cement
Chamotte powder 30；Desulfurization gypsum powder 3；Each material is weighed, puddles and is uniformly made.
The cement test result and quality of embodiment 1, are shown in Table 1.
The cement test result of 1 embodiment 1 of table
As shown in Table 1, the inspection result of 1 cement of embodiment meets " common portland cement " (GB175-2007) standard
In every quality index in relation to PF42.5 cement.
Embodiment 2
(1) preparation of solid sulfur ash powder: it will meet " for the flyash in cement and concrete " (GB/T1596-2005) and mark
Quasi- solid sulfur ash carries out levigate, specific surface area 1121m with power plant's afterheat steam kinetic energy mill2/kg。
(2) preparation of CFB residues powder: CFB residues cement ball mill is levigate, and quality meets " for cement and coagulation
Flyash in soil " (GB/T1596-2005) standard, fineness (45 μm of square hole screens tail over) is 15.2%.
(3) silicon of " common portland cement " (GB175-2007) standard the preparation of Portland clinker powder: will be met
Acid salt cement clinker, carried out with cement ball mill it is levigate, fineness (45 μm of square hole screens tail over) be 12.3%.
(4) preparation of desulfurization gypsum powder: after desulfurized gypsum is dried at normal temperature, fineness (45 levigate with cement ball mill
μm square hole screen tails over) it is 12.8%.
The preparation of PF42.5 cement: according to material utilization amount formula, solid sulfur ash powder 50；CFB residues powder 23；Portland cement
Chamotte powder 25；Desulfurization gypsum powder 2；Each material is weighed, puddles and is uniformly made.
The cement test result and quality of embodiment 2, are shown in Table 2.
The cement test result of 2 embodiment 2 of table
As shown in Table 2, the inspection result of 2 cement of embodiment meets " common portland cement " (GB175-2007) standard
In every quality index in relation to PF42.5 cement.
Embodiment 3
(1) preparation of solid sulfur ash powder: it will meet " for the flyash in cement and concrete " (GB/T1596-2005) and mark
Quasi- solid sulfur ash carries out levigate, specific surface area 1054m with power plant's afterheat steam kinetic energy mill2/kg。
(2) the mixed powder preparation of CFB residues, Portland clinker and desulfurized gypsum composition: total matter to prepare cement
Meter presses CFB residues 28%, Portland clinker 34%, 3% weighing of desulfurized gypsum respectively；After being mixed, cement ball is used
Grinding machine is levigate, and the fineness (45 μm of square hole screens tail over) of mixed powder is 14.1%；
The preparation of PF42.5 cement: in terms of the gross mass for preparing cement, solid sulfur ash powder 35%, above-mentioned mixed powder are pressed respectively
Expect 65% weighing, puddles and be uniformly made.
The cement test result and quality of embodiment 3, are shown in Table 3.
The cement test result of 3 embodiment 3 of table
As shown in Table 3, the inspection result of 3 cement of embodiment meets " common portland cement " (GB175-2007) standard
In every quality index in relation to PF42.5 cement.
Claims (4)
1. a kind of fluidized bed combustion coal ash/slag cement, it is characterised in that the component including following mass percent:
Solid sulfur ash powder 35~50, CFB residues powder 17~28, Portland clinker powder 25~37, desulfurization gypsum powder 2~3, wherein
The specific surface area of solid sulfur ash powder is not less than 1000m2/ kg, it is 15%~17% that 45 μm of square hole screens of fineness of CFB residues powder, which tail over value,.
2. a kind of fluidized bed combustion coal ash/slag cement according to claim 1, it is characterised in that the preparation of the solid sulfur ash powder are as follows: will accord with
What the circulating fluidized bed boiler operation of " for the flyash in cement and concrete " (GB/T1596-2005) standard of conjunction generated consolidates
Sulphur ash, is carried out levigate with power plant's afterheat steam kinetic energy mill, and specific surface area is not less than 1000m2/kg。
3. a kind of fluidized bed combustion coal ash/slag cement according to claim 1, it is characterised in that the CFB residues powder, portland cement are ripe
Feed powder and desulfurization gypsum powder can be prepared respectively, can also be mixed with by its raw material, specific as follows:
The preparation of the CFB residues powder: the CFB residues cement ball mill that circulating fluidized bed boiler operation is generated is levigate, matter
Amount meets (GB/T1596-2005) standard " for the flyash in cement and concrete ", and 45 μm of square hole screens of fineness tail over control
Value is 15%~17%；
The preparation of the Portland clinker powder: the silicate of " common portland cement " (GB175-2007) standard will be met
Clinker, carried out with cement ball mill it is levigate, 45 μm of square hole screens of fineness tail over controlling value be 12%~15%；
The preparation of the desulfurization gypsum powder: after desulfurized gesso of flue gas of the calcium sulphate content not less than 90% is dried at normal temperature,
Levigate with cement ball mill, it is 10%~14% that 45 μm of square hole screens of fineness, which tail over controlling value,；
The mixed powder preparation of the CFB residues, Portland clinker and desulfurized gypsum composition: by CFB residues, portland cement
Clinker and desulfurized gypsum after weighing mixing respectively according to the material prescription for preparing cement, are made, mixing with cement ball mill is levigate
It is 12%~16% that 45 μm of square hole screens of fineness of powder, which tail over controlling value,.
4. a kind of preparation method of fluidized bed combustion coal ash/slag cement described in any one of claim 1-3, it is characterised in that according to quality
Percentage takes solid sulfur ash powder, CFB residues powder, Portland clinker powder and desulfurization gypsum powder, is uniformly mixed and is made.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107555884A (en) * | 2017-07-26 | 2018-01-09 | 华电电力科学研究院 | A kind of fluidized bed combustion coal ash/slag artificial aggregate for road foundation and preparation method thereof |
| CN108585694A (en) * | 2018-06-22 | 2018-09-28 | 山西平朔煤矸石发电有限责任公司 | A kind of solid sulfur ash dry-mixed mortar and preparation method thereof |
| CN111233417A (en) * | 2020-02-29 | 2020-06-05 | 北京古运混凝土有限公司 | Preparation process of high-strength concrete |
| CN112694272B (en) * | 2020-12-25 | 2022-12-13 | 天津水泥工业设计研究院有限公司 | Low-carbon high-strength cementing material prepared from coal gangue power plant solid waste and preparation method thereof |
| CN113831035A (en) * | 2021-09-01 | 2021-12-24 | 长江三峡技术经济发展有限公司 | Retarded cement prepared from solid sulfur ash and coal gangue and preparation method of retarded cement |
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| CN1051717A (en) * | 1989-11-16 | 1991-05-29 | 清华大学 | A kind of method with solid sulphide dregs cement from solid sulphide dregs in burning coal |
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| CN103265192A (en) * | 2013-03-01 | 2013-08-28 | 魏昭荣 | Method for producing lightweight partition board by sulfur fixation fly ash |
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Effective date of registration: 20191230 Address after: 014300 Yili Industrial Park, Shulinzhao Town, Dalate County, Ordos City, Inner Mongolia Autonomous Region Patentee after: Inner Mongolia Yili Jidong Cement Co., Ltd Address before: 030006 Taiyuan, Xiaodian District, Shanxi City Road, No. 92 Patentee before: Shanxi Univeristy |
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