CN113213799A - Preparation method of slag micropowder - Google Patents
Preparation method of slag micropowder Download PDFInfo
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- CN113213799A CN113213799A CN202110704202.4A CN202110704202A CN113213799A CN 113213799 A CN113213799 A CN 113213799A CN 202110704202 A CN202110704202 A CN 202110704202A CN 113213799 A CN113213799 A CN 113213799A
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- slag
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- dry desulfurized
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- 239000002893 slag Substances 0.000 title claims abstract description 77
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 53
- 238000001035 drying Methods 0.000 claims abstract description 26
- 238000004519 manufacturing process Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 9
- 239000002956 ash Substances 0.000 claims description 52
- 239000010881 fly ash Substances 0.000 claims description 42
- 238000006477 desulfuration reaction Methods 0.000 claims description 32
- 230000023556 desulfurization Effects 0.000 claims description 32
- 239000002994 raw material Substances 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 19
- 238000000227 grinding Methods 0.000 abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 8
- 239000003546 flue gas Substances 0.000 abstract description 8
- 230000003647 oxidation Effects 0.000 abstract description 6
- 238000007254 oxidation reaction Methods 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 9
- 229910052791 calcium Inorganic materials 0.000 description 9
- 239000011575 calcium Substances 0.000 description 9
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 8
- 239000004568 cement Substances 0.000 description 7
- GBAOBIBJACZTNA-UHFFFAOYSA-L calcium sulfite Chemical compound [Ca+2].[O-]S([O-])=O GBAOBIBJACZTNA-UHFFFAOYSA-L 0.000 description 6
- 235000010261 calcium sulphite Nutrition 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000004567 concrete Substances 0.000 description 4
- 238000005245 sintering Methods 0.000 description 4
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 3
- 230000002411 adverse Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
-
- 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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a preparation method of slag micro powder, which comprises the following steps: s1, conveying the slag to a drying chamber for drying; s2, conveying the dried slag and modified semi-dry desulfurized ash obtained by modifying the semi-dry desulfurized ash to an ore mill; s3, conveying the mixed material in the ore mill to a powder concentrator; and S4, conveying the finished product materials separated from the powder concentrator to a finished product bin. According to the preparation method of the slag micro powder, the semi-dry desulfurized ash subjected to oxidation pretreatment is added into a slag micro powder production system, and the slag micro powder grinding process is utilized to uniformly mix the doped modified semi-dry desulfurized ash with the slag micro powder, so that part of the slag micro powder can be replaced, the flue gas semi-dry desulfurized ash is recycled, and the product performance can be improved.
Description
Technical Field
The invention belongs to the technical field of metallurgical slag, and particularly relates to a preparation method of slag micro powder.
Background
At present, the flue gas of the procedures of sintering, pelletizing, coke oven and the like of coal-fired power plants and iron and steel plants in China is subjected to a desulfurization process. The semi-dry desulfurization process in the flue gas desulfurization method is most widely applied at present due to the advantages of short process flow, small occupied area, investment saving, low operation cost, high desulfurization efficiency, simple control, low water consumption, no white smoke and rain and the like, but the generated semi-dry desulfurization ash faces a difficult-to-utilize situation.
According to literature research and development, calcium-based desulfurized ash in European and American countries is mainly derived from sintering flue gas desulfurization, and mainly used for backfilling, and the comprehensive utilization ratio is not high. The annual sintered flue gas calcium-based desulfurized ash produced in America is about 1.25 multiplied by 106 tons, the disposal rate is about 76 percent, the coal mine is backfilled by 60.8 percent, and the waste is stabilized and solidified by using 15.2 percent of calcium-based desulfurized ash. The calcium-based desulfurized fly ash generated in Europe every year basically realizes the complete treatment, wherein 79.2 percent of the calcium-based desulfurized fly ash is used as the backfill of the structure of the building industry, 8.5 percent of the calcium-based desulfurized fly ash is used for repairing and improving the soil, 5.6 percent of the calcium-based desulfurized fly ash is used for replacing cement to stabilize the roadbed, 4.3 percent of the calcium-based desulfurized fly ash is used as the raw material for producing the cement, and the rest 2.4 percent of the calcium-based desulfurized fly ash is used in other industrial industries.
Aiming at the treatment and comprehensive utilization of semi-dry desulfurized fly ash, domestic researchers develop a great deal of research, such as production of baking-free bricks, steam-cured bricks, filling materials and the like, but because the semi-dry desulfurized fly ash contains 20-40% of calcium sulfite, the characteristics of raw materials are unstable, the hydration reaction of the calcium sulfite is slow, the calcium sulfite can be slowly converted into calcium sulfate in the air at normal temperature to cause volume expansion, and the desulfurized fly ash can release SO again when meeting high temperature2The method causes secondary pollution to the atmosphere, causes frequent problems of various comprehensive utilization ways, can only be mixed in a small amount reluctantly and cannot realize large-volume utilization, and most of semi-dry desulfurized ash is piled up, buried, non-normalized and treated, so that a large amount of land is occupied, and the environment and water sources are seriously polluted.
Patent publication No. CN104591559A discloses a dry desulfurized fly ash slag cement, which is mainly prepared from 38-80% of slag micropowder, 3-9% of silicate clinker powder, 10-36% of dry desulfurized fly ash, 2-30% of steel slag and 3-6% of activating agent. Although the method comprehensively utilizes the dry-method desulfurized fly ash, the untreated desulfurized fly ash can generate certain adverse effects on the product performance.
Patent document CN101717218A discloses a composite admixture of semi-dry desulfurized fly ash and slag, wherein the composite admixture comprises the main component of semi-dry desulfurized fly ash mixed in slag in an amount of 3-8%. Although the method comprehensively utilizes the dry-method desulfurized fly ash, the untreated desulfurized fly ash can generate certain adverse effects on the product performance.
Patent document with publication number CN107176797A discloses a sintering flue gas dry desulphurization ash modified slag powder, which mainly comprises 1-10% of sintering flue gas dry desulphurization ash and 90-99% of slag powder. Although the method comprehensively utilizes the dry-method desulfurized fly ash, the untreated desulfurized fly ash can generate certain adverse effects on the product performance.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a preparation method of slag micro powder, and aims to improve the product performance.
In order to achieve the purpose, the invention adopts the technical scheme that: the preparation method of the slag micro powder comprises the following steps:
s1, conveying the slag to a drying chamber for drying;
s2, conveying the dried slag and modified semi-dry desulfurized ash obtained by modifying the semi-dry desulfurized ash to an ore mill;
s3, conveying the mixed material in the ore mill to a powder concentrator;
and S4, conveying the finished product materials separated from the powder concentrator to a finished product bin.
In step S2, the process of modifying the semi-dry desulfurized fly ash includes the steps of:
s201, pretreating semidry desulfurization ash;
s202, conveying the pretreated semidry desulfurization ash to a modified desulfurization ash bin;
s203, discharging the modified desulfurization ash bin to a tank car;
and S204, transporting the modified semi-dry desulfurized ash to a slag micro powder production line by a tank car, and transporting the modified semi-dry desulfurized ash to a standby raw material bin for storage.
The proportion of the modified semi-dry desulfurization ash with the particle size of less than 60 mu m is not less than 90 percent, the average particle size of the modified semi-dry desulfurization ash is not more than 30 mu m, the water content is not more than 1 percent, and the bulk density is 0.3-0.6 g/cm3。
CaSO in modified semi-dry desulfurized fly ash3The content is not higher than 2 percent, and the Cl-content is not higher than 2 percent.
In the step S203, the tank car is a common tank car or a suction pressure type tank car.
And a blanking control system is arranged at a blanking port at the bottom of the standby raw material bin.
The ore mill is a ball mill.
In the step S1, the modified semi-dry desulfurized fly ash is conveyed to a drying chamber.
According to the preparation method of the slag micro powder, the semi-dry desulfurized ash subjected to oxidation pretreatment is added into a slag micro powder production system, the slag micro powder grinding process is utilized, the doped modified semi-dry desulfurized ash is uniformly mixed with the slag micro powder to replace part of the slag micro powder, the flue gas semi-dry desulfurized ash is recycled, the problem that the semi-dry desulfurized ash cannot be utilized is solved through the slag micro powder grinding system, the use performance of the slag micro powder cannot be influenced, and the technical indexes of the produced product meet the requirements of granulated blast furnace slag powder for cement and concrete (GB/T18046-2017).
Drawings
The description includes the following figures, the contents shown are respectively:
FIG. 1 is a process diagram of a process for producing fine slag powder according to the present invention;
labeled as: 1. semi-dry desulfurized fly ash; 2. pre-treating; 3. a modified desulfurization ash bin; 4. a tank car; 5. a standby raw material bin; 6. a slag stock ground; 7. a drying chamber; 8. grinding an ore mill; 9. selecting a powder machine; 10. and (6) a finished product bin.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the inventive concept and technical solution of the present invention and to facilitate its implementation.
As shown in fig. 1, the present invention provides a method for producing slag micropowder, comprising the steps of:
s1, conveying the slag to a drying chamber 7 for drying;
s2, conveying the dried slag and modified semi-dry desulfurized ash obtained by modifying the semi-dry desulfurized ash to an ore mill 8;
s3, conveying the mixed material in the ore mill 8 to the powder concentrator 9;
and S4, conveying the finished product materials separated from the powder separator 9 to the finished product bin 10.
Specifically, semi-dry desulfurized fly ash entering a slag micro-powder production system must be modified by pretreatment, the pretreatment method is not limited, but other substances are not introduced, the proportion of the particle size of the modified semi-dry desulfurized fly ash being less than 60 mu m is not less than 90%, the average particle size of the modified semi-dry desulfurized fly ash is not more than 30 mu m, the water content is not more than 1%, and the bulk density is 0.3-0.6 g/cm3. Modified semi-dry desulfurized fly ash of CaSO3The content is not higher than 2 percent, and the Cl-content is not higher than 2 percent.
As shown in fig. 1, in step S2, the process of modifying the semi-dry desulfurized fly ash includes the following steps:
s201, carrying out oxidation pretreatment on the semi-dry desulfurized fly ash;
s202, conveying the pretreated semidry desulfurization ash to a modified desulfurization ash bin 3;
s203, regularly discharging the modified desulfurization ash bin 3 to a tank car 4;
and S204, transporting the modified semi-dry desulfurized ash to a slag micro powder production line by a tank car 4, and transporting the modified semi-dry desulfurized ash to a standby raw material bin 5 for storage.
In the step S203, the tank car 4 is a common tank car or a suction-pressure tank car, and the modified semi-dry desulfurized fly ash can be transported by the common tank car or the suction-pressure tank car.
The bottom feed opening of reserve raw materials storehouse 5 sets up unloading control system, can accurate control unloading speed in certain extent through unloading control system, and its control system links to each other with the central control system of slay miropowder production. The blanking speed of the modified semi-dry desulfurized fly ash is closely related to production, the addition range of the modified semi-dry desulfurized fly ash is controlled to be 0-3 percent (accounting for the proportion of the total amount), and the blanking speed is controlled by a central control system.
In this embodiment, the ore mill 8 is a ball mill.
The manner of adding the modified desulfurized fly ash to the fine slag powder grinding system is not limited to the belt feeding between the drying chamber 7 and the mill 8, and if the drying chamber 7 does not use circulating hot air or an air draft device, the modified semi-dry desulfurized fly ash is conveyed to the drying chamber 7 and then conveyed to the mill 8 together with the slag in the above-described step S1.
In the above step S1, the slag of the slag yard 6 is conveyed to the drying chamber 7 by the belt conveyor.
In step S2, the slag dried in the drying chamber 7 is conveyed to the mill 8 by the belt conveyor, the modified semi-dry desulfurized fly ash is discharged at a constant speed from the spare raw material bin 5 onto the belt conveyor between the drying chamber 7 and the ball mill, and finally mixed uniformly together with the slag by the mill 8 and the powder concentrator 9 to meet the production requirements, and the mixture enters the finished product bin 10.
The first embodiment is as follows:
after the semi-dry desulfurized fly ash generated by a certain steel mill is subjected to oxidation pretreatment, the modified semi-dry desulfurized fly ash is obtained, wherein the content of calcium sulfite is 1.46%, the content of calcium sulfate is 22.07%, and the content of chloride ions is 1.08%. The modified semi-dry desulfurization ash is transported to a standby raw material bin 5 of a slag micro powder production line by a tank car 4 to be stored, slag of a slag stock yard 6 enters a drying chamber 7 through a conveying belt, the slag dried in the drying chamber 7 is conveyed to a grinding machine 8 through a belt conveyor, the modified semi-dry desulfurization ash is discharged onto the belt conveyor between the drying chamber 7 and the grinding machine 8 from the standby raw material bin 5 at a constant speed, the discharging amount of the modified semi-dry desulfurization ash is 1% of the total production amount, and the modified semi-dry desulfurization ash and the slag finally enter a finished product bin 10 through the grinding machine 8 and a powder concentrator 9. The technical indexes of the produced slag micro powder product meet the standard requirements of granulated blast furnace slag powder used in cement and concrete (GB/T18046-2017), wherein the strength of a sample in 7 days and 28 days is 42.18MPa and 68.50MPa respectively, and the strength of the sample in 7 days and 28 days is 40.81MPa and 58.76MPa respectively, so the activity indexes of the product in 7 days and 28 days are 103.36 percent and 116.58 percent respectively, and the standard requirements are met.
Example two:
after the semi-dry desulfurized fly ash generated by a certain steel mill is subjected to oxidation pretreatment, the modified semi-dry desulfurized fly ash is obtained, wherein the content of calcium sulfite is 1.46%, the content of calcium sulfate is 22.07%, and the content of chloride ions is 1.08%. The modified semi-dry desulfurization ash is transported to a standby raw material bin 5 of a slag micro powder production line by a tank car 4 to be stored, slag of a slag stock yard 6 enters a drying chamber 7 through a conveying belt, the slag dried in the drying chamber 7 is conveyed to a grinding machine 8 through a belt conveyor, the modified semi-dry desulfurization ash is uniformly discharged onto the belt conveyor between the drying chamber 7 and the grinding machine 8 through the standby raw material bin 5, the discharging amount of the modified semi-dry desulfurization ash is 2% of the total production amount, and the modified semi-dry desulfurization ash and the slag finally enter a finished product bin 10 through the grinding machine 8 and a powder concentrator 9. The technical indexes of the produced slag micro powder product meet the standard requirements of granulated blast furnace slag powder used in cement and concrete (GB/T18046-2017), wherein the strength of a sample in 7 days and 28 days is 48.64MPa and 59.74MPa respectively, and the strength of a comparative sample in 7 days and 28 days is 40.81MPa and 58.76MPa respectively, so that the activity indexes of the product in 7 days and 28 days are 119.19 percent and 101.67 percent respectively, and the standard requirements are met.
Example three:
after the semi-dry desulfurized fly ash generated by a certain steel mill is subjected to oxidation pretreatment, the modified semi-dry desulfurized fly ash is obtained, wherein the content of calcium sulfite is 1.46%, the content of calcium sulfate is 22.07%, and the content of chloride ions is 1.08%. The modified semi-dry desulfurization ash is transported to a standby raw material bin 5 of a slag micro powder production line by a tank car 4 to be stored, slag of a slag stock yard 6 enters a drying chamber 7 through a conveying belt, the slag dried in the drying chamber 7 is conveyed to a grinding machine 8 through a belt conveyor, the modified semi-dry desulfurization ash is discharged onto the belt conveyor between the drying chamber 7 and the grinding machine 8 from the standby raw material bin 5 at a constant speed, the discharging amount of the modified semi-dry desulfurization ash is 3% of the total production amount, and the modified semi-dry desulfurization ash and the slag finally enter a finished product bin 10 through the grinding machine 8 and a powder concentrator 9. The technical indexes of the produced slag micro powder product meet the standard requirements of granulated blast furnace slag powder used in cement and concrete (GB/T18046-2017), wherein the strength of a sample in 7 days and 28 days is 41.69MPa and 60.84MPa respectively, and the strength of a comparative sample in 7 days and 28 days is 40.81MPa and 58.76MPa respectively, so that the activity indexes of the product in 7 days and 28 days are 102.16 percent and 103.54 percent respectively, and the standard requirements are met.
The invention is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.
Claims (8)
1. The preparation method of the slag micro powder is characterized by comprising the following steps:
s1, conveying the slag to a drying chamber for drying;
s2, conveying the dried slag and modified semi-dry desulfurized ash obtained by modifying the semi-dry desulfurized ash to an ore mill;
s3, conveying the mixed material in the ore mill to a powder concentrator;
and S4, conveying the finished product materials separated from the powder concentrator to a finished product bin.
2. The slag micropowder preparation method according to claim 1, wherein the step S2, the step of modifying the semi-dry desulfurized ash includes the steps of:
s201, pretreating semidry desulfurization ash;
s202, conveying the pretreated semidry desulfurization ash to a modified desulfurization ash bin;
s203, discharging the modified desulfurization ash bin to a tank car;
and S204, transporting the modified semi-dry desulfurized ash to a slag micro powder production line by a tank car, and transporting the modified semi-dry desulfurized ash to a standby raw material bin for storage.
3. The superfine slag powder preparation method according to claim 1 or 2, wherein the modified semi-dry desulfurized ash has a particle size of 60 μm or more of 90%, an average particle size of 30 μm or more, a water content of 1% or more, and a bulk density of 0.3 to 0.6g/cm3。
4. The fine slag powder production method according to any one of claims 1 to 3, wherein CaSO is contained in the modified semi-dry desulfurized fly ash3The content is not higher than 2 percent, and the Cl-content is not higher than 2 percent.
5. The slag micropowder preparation method according to claim 2, wherein in the step S203, the tank car is a general tank car or a suction-pressure tank car.
6. The slag micropowder preparation method according to claim 2, wherein a blanking control system is provided to a bottom blanking port of the standby raw material silo.
7. The fine slag powder production method according to any one of claims 1 to 6, wherein the ore mill is a ball mill.
8. The fine slag powder production method according to any one of claims 1 to 6, wherein in the step S1, the modified semi-dry desulfurized ash is conveyed to a drying chamber.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114276038A (en) * | 2022-01-11 | 2022-04-05 | 北京北科环境工程有限公司 | Preparation method of slag micropowder by using semidry desulfurized fly ash |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB513901A (en) * | 1938-02-22 | 1939-10-25 | Nelson Elliot Wallace | Improvements in and relating to the manufacture of cements from calcium sulphate andblast furnace slag |
| CN101717218A (en) * | 2009-12-02 | 2010-06-02 | 江苏大峘集团有限公司 | Composite blend of semi-dry desulphurization ash and slag and preparation method thereof |
| CN102000481A (en) * | 2009-08-31 | 2011-04-06 | 宝山钢铁股份有限公司 | Method for treating desulfurization ash |
| CN102010146A (en) * | 2010-10-15 | 2011-04-13 | 中钢集团武汉安全环保研究院有限公司 | Method for modifying desulfuration ash for cement retarder |
| CN103708808A (en) * | 2013-12-06 | 2014-04-09 | 马钢(集团)控股有限公司 | Sintering flue gas semi-dry desulfurization ash autoclaved brick and production method therefor |
| JP2016008159A (en) * | 2014-06-25 | 2016-01-18 | 宇部興産株式会社 | Method for producing blast furnace slag fine powder, and method for producing blast furnace cement |
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2021
- 2021-06-24 CN CN202110704202.4A patent/CN113213799A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB513901A (en) * | 1938-02-22 | 1939-10-25 | Nelson Elliot Wallace | Improvements in and relating to the manufacture of cements from calcium sulphate andblast furnace slag |
| CN102000481A (en) * | 2009-08-31 | 2011-04-06 | 宝山钢铁股份有限公司 | Method for treating desulfurization ash |
| CN101717218A (en) * | 2009-12-02 | 2010-06-02 | 江苏大峘集团有限公司 | Composite blend of semi-dry desulphurization ash and slag and preparation method thereof |
| CN102010146A (en) * | 2010-10-15 | 2011-04-13 | 中钢集团武汉安全环保研究院有限公司 | Method for modifying desulfuration ash for cement retarder |
| CN103708808A (en) * | 2013-12-06 | 2014-04-09 | 马钢(集团)控股有限公司 | Sintering flue gas semi-dry desulfurization ash autoclaved brick and production method therefor |
| JP2016008159A (en) * | 2014-06-25 | 2016-01-18 | 宇部興産株式会社 | Method for producing blast furnace slag fine powder, and method for producing blast furnace cement |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114276038A (en) * | 2022-01-11 | 2022-04-05 | 北京北科环境工程有限公司 | Preparation method of slag micropowder by using semidry desulfurized fly ash |
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