CN206831546U - A kind of pulverized-coal fired boiler waste heat from tail gas for pulverized coal preparation utilizes system - Google Patents
A kind of pulverized-coal fired boiler waste heat from tail gas for pulverized coal preparation utilizes system Download PDFInfo
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- CN206831546U CN206831546U CN201720689245.9U CN201720689245U CN206831546U CN 206831546 U CN206831546 U CN 206831546U CN 201720689245 U CN201720689245 U CN 201720689245U CN 206831546 U CN206831546 U CN 206831546U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
It the utility model is related to a kind of pulverized-coal fired boiler waste heat from tail gas for pulverized coal preparation and utilize system, it is characterized in including pulverized coal preparation system, boiler exhaust gas system for handling, pulverized coal preparation system mainly have Mo Qiancang, feeder, middling speed roller mill, powder collector, hot-blast stove, coal dust tower and hot-blast stove air-introduced machine；Pulverized-coal fired boiler vent gas treatment system mainly has the tail gas flue, unified boiler flue, desulfurizing tower, wet electric cleaner and the chimney connected successively by desulfurizing tower inlet flue gas baffle door with unified boiler flue of one or more pulverized-coal fired boiler；Joint flue goes powder gas baffle door processed to be connected to hot-blast stove fume import through tail gas recycle flue by boiler；Powder collector exhanst gas outlet divides two-way loop flue by air-introduced machine, is connected to desulfurizing tower all the way, and another way is connected to boiler by circulating bypass valve and gone on the tail gas recycle flue between powder gas baffle door processed and hot-blast stove fume import；Hot-blast stove fume exports the gas approach for being connected to middling speed roller mill.
Description
Technical field
It the utility model is related to a kind of waste heat of boiler tail gas and utilize system, more particularly to a kind of coal dust for pulverized coal preparation
Waste heat of boiler tail gas utilizes system.
Background technology
Coal accounts for 66% in the consumption of China's primary energy, in face of the energy resource structure of China's richness coal, oil-poor, few gas, with
Coal is difficult to great change occurs in a short time for the energy consumption structure of main body.The energy is the mainstay of economic development, is full
The demand of sufficient rapid economic development, it is energy-saving already to turn into state basic policy, how to improve thermal effect for wide variety of coal-burning boiler
Rate, reduce heat-energy losses, also as industry extensive concern the problem of.
At present, in pulverized-coal fired boiler application, its flue gas system flow is：Coal dust is delivered to coal dust tower by nitrogen, through feed
Device, mixed with First air and be blown into pulverized-coal fired boiler top burner.It is combustion-supporting through two, tertiary air, fully burnt inside burner hearth, burner hearth
About 750 DEG C of middle portion temperature.After flue gas carries out heat exchange in burner hearth with water-cooling wall, entered by the revolution smoke-box of burner hearth bottom
High temperature convection heating surface and a net backwater carry out a heat exchange, and flue gas is cooled to 380 DEG C or so.Subsequent flue gas takes off into SCR
Nitre device carries out denitration, and the flue gas after denitration enters low temperature convection heating surface and a net backwater carries out secondary heat exchange, most rear molding
Gas is cooled further to 120 DEG C after one-level bag-type dust collector, i.e., into exhausted smoke processing system.In fact, 120 DEG C of tail
Gas still has heat energy utilization space, if further utilizing, reduces exhaust gas temperature, the effect that then obtain energy-conservation lowers consumption.Furthermore coal
Powder is combustible, belongs to Class B fire dangerous material, and dust has deflagrability, how ensured safety in production as pulverized coal preparation system
Research bottleneck.In addition, pulverized coal preparation system needs high temperature heat source to be preheated at this stage, and dried in grinding process
Dry, high temperature heat source is typically supplied by hot-blast stove, but contains large quantity of air pollutant in the flue gas of hot-blast stove discharge, will certainly be caused
Pollution to air.
In consideration of it, it is how energy-saving using smoke discharging residual heat, the security of pulverized coal preparation link is improved, and reduce coal dust system
Hot-blast stove fume discharge capacity in standby system, turns into the problem of industry is paid close attention to.
Utility model content
Main purpose of the present utility model is in view of the above-mentioned problems, providing a kind of pulverized-coal fired boiler tail for pulverized coal preparation
Gas afterheat utilizing system, by the way that the tail gas of pulverized-coal fired boiler is introduced into pulverized coal preparation system, further using more than pulverized-coal fired boiler tail gas
Heat as thermal source prepares coal dust, then can realize energy-saving, reduces cost of investment, the security of raising pulverized coal preparation link simultaneously subtracts
Of low pollution, beneficial to environmental protection.
Technical scheme is used by the utility model solves its technical problem：
A kind of pulverized-coal fired boiler waste heat from tail gas for pulverized coal preparation utilizes system, it is characterised in that including pulverized coal preparation body
System, pulverized-coal fired boiler vent gas treatment system, the pulverized coal preparation system is mainly by Mo Qiancang, feeder, middling speed roller mill, receipts powder
Device, hot-blast stove, hot-blast stove coal dust tower and hot-blast stove draft mechanism are into the preceding storehouse of mill is connected to entering for middling speed roller mill through feeder
Material mouth, the discharging opening of middling speed roller mill are connected to powder collector powder inlet, and powder collector meal outlet is connected to the storehouse pump of output coal dust；The coal
Powder boiler exhaust gas system for handling is mainly by the tail gas flue of one or more pulverized-coal fired boiler, the coal dust being connected with the tail gas flue
Unified boiler flue, combine desulfurizing tower, the wet electricity that flue is sequentially connected by desulfurizing tower inlet flue gas baffle door with pulverized-coal fired boiler
Deduster and chimney are formed；The pulverized-coal fired boiler joint flue goes powder gas baffle door processed to connect through tail gas recycle flue by boiler
To hot-blast stove fume import；The exhanst gas outlet of powder collector is divided into two-way loop flue by powder air-introduced machine processed, wherein loop all the way
Flue passes sequentially through powder processed, and sulphur gas baffle door and desulfurizing tower inlet flue gas baffle door are connected to desulfurizing tower, another way loop cigarette back off
Road is connected to boiler by circulating bypass valve and gone on the tail gas recycle flue between powder gas baffle door processed and hot-blast stove fume import；
The hot-blast stove charging aperture connects the discharging opening and hot-blast stove air-introduced machine of hot-blast stove coal dust tower respectively；Hot-blast stove fume is exported through cigarette
Road is connected to the gas approach of middling speed roller mill.
Heated sealed blower fan is set, and the heated sealed blower fan is connected to the joint flue gas baffle door and desulfurization respectively
Tower inlet flue gas baffle door.
The feeder is the totally-enclosed feeder of Weighing type；The powder collector is bladder type powder recepting device.
The beneficial effects of the utility model are：The waste heat of pulverized-coal fired boiler tail gas is taken full advantage of, saves the combustion of hot-blast stove
Material consumption, reduce hot blast heat size, reduce coal dust conveying protection system nitrogen preparation amount, so as to reduce pulverized coal preparation into
This, realizes the cascade utilization of low grade heat energy；Furthermore for prevent coal dust in grinding process detonation, it is necessary to ensure that flue gas oxygen contains
Amount below 12%, and pulverized-coal fired boiler tail gas it is a technical advantage that, under pulverized-coal fired boiler oepration at full load state, pulverized-coal fired boiler
The oxygen content of tail gas is generally 4%-5%, and the tail gas simultaneously, greatly improves in the production requirement for fully meeting pulverized coal preparation system
The security of pulverized coal preparation link；In addition, also reducing hot-blast stove fume discharge capacity, the pollution to air is reduced, beneficial to ring
Protect.
Brief description of the drawings
Fig. 1 is the structure and system flow chart of the present invention；
In figure：01 1# pulverized-coal fired boiler flues, 02 2# pulverized-coal fired boiler flues, 03 3# pulverized-coal fired boiler flues；The 1 preceding storehouse of mill, 2
Feeder, 3 middling speed roller mills, 31 middling speed roller mill charging apertures, 32 middling speed roller mill discharging openings, 33 middling speed roller mill flue gases enter
Mouthful, 4 powder collectors, 41 powder inlets, 42 powder collector exhanst gas outlets, 43 meal outlets, 5 storehouse pumps, 6 powder air-introduced machines processed, 61,62 loop cigarettes
Road, 7 hot-blast stoves, 71 hot-blast stove fume imports, 72 hot-blast stove charging apertures, the outlet of 73 hot-blast stove fumes, 8 hot-blast stove air-introduced machines, 9 heat
Wind furnace coal dust tower, 91 coal dust tower discharging openings, 10 electromagnetism regulating butterfly valves, 11 circulation bypass valves, 12 boilers remove powder gas baffle door processed,
Sulphur gas baffle door, 14 desulfurizing tower inlet flue gas baffle doors, 15 pulverized-coal fired boilers combine flue, 16 heated sealed wind to 13 powder processed back off
Machine, 17 desulfurizing towers, 18 wet electric cleaners, 19 chimneys, 20 tail gas recycle flues
The utility model is described in detail below in conjunction with drawings and examples.
Embodiment
Fig. 1 shows that a kind of pulverized-coal fired boiler waste heat from tail gas for pulverized coal preparation utilizes system, it is characterised in that including coal dust
Preparation system, pulverized-coal fired boiler vent gas treatment system, the pulverized coal preparation system is mainly by grinding preceding storehouse 1, feeder 2, middling speed roller mill
Machine 3, powder collector 4, hot-blast stove 7, hot-blast stove coal dust tower 9 and hot-blast stove air-introduced machine 8 are formed, and the preceding storehouse 1 of mill is connected to through feeder 2
The charging aperture 31 of middling speed roller mill 3, the discharging opening 32 of middling speed roller mill are connected to the powder inlet 41 of powder collector, the meal outlet of powder collector
43 are connected to the storehouse pump 5 of output coal dust.The pulverized-coal fired boiler vent gas treatment system is mainly by the tail gas of one or more pulverized-coal fired boiler
Flue, the pulverized-coal fired boiler being connected with tail gas flue joint flue 15, combine flue 15 with pulverized-coal fired boiler and entered by desulfurizing tower
Desulfurizing tower 17, wet electric cleaner 18 and the chimney 19 that mouth gas baffle door 14 is sequentially connected are formed, and in this example, there is provided three coals
The tail gas flue 01,02,03 of powder boiler (1#-3# pulverized-coal fired boilers), joint flue 15 are connected with tail gas flue 01,02,03 respectively.
The pulverized-coal fired boiler joint flue 15 goes powder gas baffle door 12 processed to be connected to through tail gas recycle flue 20 by boiler
Hot-blast stove fume import 71；The exhanst gas outlet 42 of powder collector 4 is divided for two-way loop flue 61,62 by powder air-introduced machine 6 processed, wherein
Loop flue 61 passes sequentially through powder processed sulphur gas baffle door 13 and desulfurizing tower inlet flue gas baffle door 14 is connected to desulfurization back off all the way
Tower 17, another way loop flue 62 are connected to boiler by circulating bypass valve 11 and go powder gas baffle door 12 processed to enter with hot-blast stove fume
On tail gas recycle flue 20 between mouth 71；The hot-blast stove charging aperture 72 connects the discharging opening 91 of hot-blast stove coal dust tower 9 respectively
And hot-blast stove air-introduced machine 8；Hot-blast stove fume outlet 73 is connected to the gas approach 33 of middling speed roller mill through flue.
The utility model is also provided with heated sealed blower fan 16, and the heated sealed blower fan 16 is connected to the joint cigarette respectively
Road gas baffle door 12 and desulfurizing tower inlet flue gas baffle door 13.
Referring to Fig. 1, on the flue of system, the flue of powder air-introduced machine 6 processed is such as led in powder collector exhanst gas outlet 42
On upper, powder air-introduced machine 6 processed exhaust pass, on tail gas recycle flue 20, Self-air-heating kiln gas outlet 73 be connected to middling speed roller mill 3
Gas approach 33 flue it is first-class, the electromagnetism regulating butterfly valve 10 for being opened and closed, adjusting exhaust gas volumn size is provided with, in hot blast
On the pipeline connected between stove air-introduced machine 8 and hot-blast stove charging aperture 72, electromagnetism regulating butterfly valve 10 is also provided with, to control opening for air quantity
Close, size.
In the present embodiment, above-mentioned feeder 2 employs the totally-enclosed feeder of Weighing type, and above-mentioned powder collector 4 employs pocket type
Powder collector, circulation bypass valve 11 also use above-mentioned electromagnetism regulating butterfly valve 9.
Operation principle of the present utility model：
As shown in figure 1, raw coal is stored in the preceding storehouse 1 of mill, the weighed totally-enclosed feeder 2 of formula quantitatively feeds middling speed roller mill
3.In pulverizing process, with the rotation of the rotating disk of middling speed roller mill 3, raw coal under the influence of centrifugal force, shifts to mill edge by wind
Ring high velocity air takes up, and bulky grain falls directly on mill grinding again, and the feed coal in air-flow enters Upper separator, is revolving
Walk around in the presence of son, coarse powder falls on mill grinding again from cone bucket, and qualified fine powder goes out mill with air-flow, passes through bladder type powder recepting
Device 4 is collected, as coal dust.Grinding process uses " one-step method " mode of operation dried when grinding, and once grinding to produce
Go out the coal dust of relatively dry.
It is straight via desulfurizing tower inlet flue gas baffle door 14 that pulverized-coal fired boiler partial tail gas can combine flue 15 by pulverized-coal fired boiler
Tap into desulfurizing tower 17, remainder flue gas is then introduced back into pulverized coal preparation system.The thermal source of coal dust drying is in hot-blast stove 7
900 DEG C of flue gases that the coal dust firing provided through coal dust tower 9 generates mix composition with the 120 DEG C of pulverized-coal fired boiler tail gas led back.
Tail gas recycle flue 20 all the way is drawn from pulverized-coal fired boiler joint flue 15,120 DEG C of pulverized-coal fired boiler tail gas are introduced into heat
The mixing chamber of wind furnace 7.Hot-blast stove 7 generates 900 DEG C of high-temperature flue gas, with coal by the coal dust firing in hot-blast stove coal dust tower 9 simultaneously
Powder boiler exhaust gas mixes, and flue-gas temperature dries coal dust up to 230 DEG C or so into middling speed roller mill 3 after mixing.
Coal dust, using nitrogen circulation the powder system, is transported in boiler room Pulverized Coal Bin after the collection of powder collector 4 by storehouse pump 5.
Whole pulverized coal preparation system is whole to be run for negative pressure, and negative pressure is produced by the system afterbody powder air-introduced machine 6.By powder air-introduced machine 6 processed
The exhausted temperature led back is 80 DEG C, pressure 3500Pa, and the resistance of the facilities such as desulfurizing tower 17, wet electric cleaner 18 is overcome with this,
And need that sulphur gas baffle door 13 adjusts the exhaust gas volumn into desulfurizing tower 17 back off by powder processed.In the process, powder processed draws
Blower fan 6 needs variable frequency adjustment air-introduced machine lift to carry out the flue gas pressures phase with the tail gas flue 01-03 of pulverized-coal fired boiler feeding desulfurizing towers 17
Adapt to.
Operationally, different operating modes occur in the difference that quantity is opened according to pulverized-coal fired boiler to the utility model, when only 1
During pulverized-coal fired boiler oepration at full load, pulverized-coal fired boiler exhaust smoke tolerance is less than the exhaust gas volumn of pulverized coal preparation system demand, now, opens
Circulate bypass valve 11 so that the flue gas of pulverized coal preparation system forms self-loopa, voluntarily the exhaust gas volumn of deficiency is entered through bypass flue
Row supplement.When more than 2 pulverized-coal fired boiler oeprations at full load, pulverized-coal fired boiler exhaust smoke tolerance is more than pulverized coal preparation system demand
Exhaust gas volumn, therefore, close circulation bypass valve 11.
It is as follows using the operating procedure of system using the above-mentioned pulverized-coal fired boiler waste heat from tail gas for pulverized coal preparation：
(1) whole system pipeline closed is checked, checks that boiler removes powder gas baffle door 12 processed, powder processed returns desulfurization fume gear
Plate door 13, desulfurizing tower inlet flue gas baffle door 14, if regular event, in place whether opening and closing.
(2) pulverized-coal fired boiler master control room is inquired, determines that pulverized-coal fired boiler is in normal combustion situation, and determine pulverized coal preparation system
Pulverized-coal fired boiler tail gas can be introduced.
(3) heated sealed blower fan 16 is opened, powder gas baffle door 12 processed and powder processed sulphur back off are removed to boiler
Gas baffle door 13 is sealed.
(4) start powder air-introduced machine 6 processed, while open boiler and go powder gas baffle door 12 processed, powder processed to return desulphurization fume baffle
Door 13, pulverized-coal fired boiler tail gas is introduced, whole pulverized coal preparation system is preheated.
(5) treat that the flue-gas temperature of the gas approach 33 of middling speed roller mill 3 reaches 80 DEG C, oxygen content is down to less than 12%
When, prepare to start pulverized coal preparation system.
(6) hot-blast stove air-introduced machine 8 is opened, and hot-blast stove 7 is lighted using diesel oil, is entered by coal dust in hot-blast stove coal dust tower 9
Row baker heats up.
(7) pulverized-coal fired boiler master control room aforesaid operations step is informed, and confirms that pulverized-coal fired boiler opens number of units.
(7.1) when only 1 pulverized-coal fired boiler oepration at full load, pulverized-coal fired boiler flue gas amount is less than pulverized coal preparation system
Demand exhaust gas volumn, now, ON cycle bypass valve 11.
It is not suitable for this operating procedure in this example for 3 pulverized-coal fired boilers.
(7.2) when more than 2 pulverized-coal fired boiler oeprations at full load, pulverized-coal fired boiler flue gas amount is more than pulverized coal preparation system
Demand exhaust gas volumn, circulation bypass valve 11 need to be closed.It is 3 pulverized-coal fired boilers in this example, that is, provides the flue of 1#-3# pulverized-coal fired boilers
01-03 tail gas amount, therefore perform this operating procedure.
(8) pulverized-coal fired boiler master control room above-mentioned steps are informed, and pay attention to coal powder boiler combustion situation, ensure pulverized-coal fired boiler tail gas
Oxygen content 4%-5%, pulverized-coal fired boiler need to inform pulverized coal preparation system if any shutdown plan.
(9) desulfurization master control room above-mentioned steps are informed, and observe the inlet flue gas pressure of desulfurizing tower 17, and by powder air-introduced machine 6 processed
Variable frequency adjustment blower fan lift is adapted to be sent into the flue gas pressures of desulfurizing tower 17 with 1#-3# pulverized-coal fired boiler flues 01-03.
(10) the flue gas data cases of the gas approach 33 of middling speed roller mill, normal condition are observed, oxygen content of smoke gas is less than
12%, exhaust gas volumn is more than 8.8 ten thousand Nm3/ h, 230 DEG C or so of temperature.
(11) start middling speed roller mill 3 successively, the totally-enclosed feeder 2 of Weighing type, formally enter powder link processed, and the moment is seen
Examine oxygen content of smoke gas, the important parameter such as exhaust gas volumn and temperature.
In summary, the pulverized-coal fired boiler waste heat from tail gas provided by the utility model for pulverized coal preparation utilizes system, by making
Powder air-introduced machine forms local decompression, and pulverized-coal fired boiler flue 01-03 boiler exhaust gas is used as into thermal source joins by pulverized-coal fired boiler flue gas
Close flue and introduce pulverized coal preparation system, pulverized coal preparation system is preheated；It is and then 120 DEG C of pulverized-coal fired boiler tail gas, introducing is hot
Wind furnace 7, the 900 DEG C of high-temperature flue gas generated with coal dust firing in hot-blast stove are mixed, and flue-gas temperature is up to 230 DEG C of left sides after mixing
The right side, using the characteristics of mixed flue gas temperature is high, oxygen content is low, the drying coal dust in middling speed roller mill 3.By grinding, drying
Coal dust afterwards enters powder collector 4, and coal dust is collected by powder collector, and flue gas then comes back to pulverized-coal fired boiler side through pipeline, carry out desulfurization,
Air is emitted into after wet electric precipitation processing.Thus, the waste heat of pulverized-coal fired boiler tail gas is fully used.Production practices prove, adopt
Can be saved by often covering one Heating Season of pulverized coal preparation system using system with above-mentioned pulverized-coal fired boiler waste heat from tail gas by about 113.9 ten thousand yuan.Its
In：One middling speed roller mill needs the Nm of exhaust gas volumn 8.8 ten thousand3/ h, whole year operation 146 days, runs 13 hours, raw coal price daily
900 yuan/ton, coal conservation 667kg/h, therefore, great popularization.
In addition, the characteristics of using pulverized-coal fired boiler tail gas oxygen content 4%-5%, the oxygen content of smoke gas in grinding process is controlled
Below 12%, to meet the production requirement of pulverized coal preparation system, pulverized coal preparation link security, energy saving are greatly improved, and
Emission reduction effect is obvious, operates steadily reliable.The fuel consumption of hot-blast stove is also saved, reduces the preparation of protection system nitrogen
Amount, reduces operating cost, realizes the cascade utilization of low grade heat energy.This technology reduces hot-blast stove and born to a certain extent
Lotus, reduce the discharge of hot-blast stove, it is ensured that discharge index is up to standard, is advantageous to environmental protection.
It is described above, only it is preferred embodiment of the present utility model, not structure of the present utility model is made any
Formal limitation.Every any simple modification made according to the technical essence of the utility model to above example, it is equal
Change and modification, in the range of still falling within technical solutions of the utility model.
Claims (3)
1. a kind of pulverized-coal fired boiler waste heat from tail gas for pulverized coal preparation utilizes system, it is characterised in that including pulverized coal preparation system,
Pulverized-coal fired boiler vent gas treatment system, the pulverized coal preparation system is mainly by Mo Qiancang, feeder, middling speed roller mill, powder collector, heat
Wind furnace, hot-blast stove coal dust tower and hot-blast stove draft mechanism into, the preceding storehouse of the mill is connected to the charging aperture of middling speed roller mill through feeder,
The discharging opening of middling speed roller mill is connected to powder collector powder inlet, and powder collector meal outlet is connected to the storehouse pump of output coal dust；The coal dust pot
Furnace exhaust gas system for handling is mainly by the tail gas flue of one or more pulverized-coal fired boiler, the pulverized-coal fired boiler being connected with the tail gas flue
Joint flue, combine desulfurizing tower, the wet electric precipitation that flue is sequentially connected by desulfurizing tower inlet flue gas baffle door with pulverized-coal fired boiler
Device and chimney are formed；The pulverized-coal fired boiler joint flue goes powder gas baffle door processed to be connected to heat through tail gas recycle flue by boiler
Wind furnace gas approach；The exhanst gas outlet of powder collector is divided into two-way loop flue by powder air-introduced machine processed, wherein loop flue all the way
Passing sequentially through powder processed, sulphur gas baffle door and desulfurizing tower inlet flue gas baffle door are connected to desulfurizing tower back off, and another way loop flue leads to
Circulation bypass valve is crossed to be connected to boiler and go on the tail gas recycle flue between powder gas baffle door processed and hot-blast stove fume import；It is described
Hot-blast stove charging aperture connects the discharging opening and hot-blast stove air-introduced machine of hot-blast stove coal dust tower respectively；Hot-blast stove fume outlet connects through flue
To the gas approach of middling speed roller mill.
2. a kind of pulverized-coal fired boiler waste heat from tail gas for pulverized coal preparation according to claim 1 utilizes system, its feature exists
In setting heated sealed blower fan, the heated sealed blower fan is connected to the joint flue gas baffle door and desulfurizing tower entrance respectively
Gas baffle door.
3. a kind of pulverized-coal fired boiler waste heat from tail gas for pulverized coal preparation according to claim 1 or 2 utilizes system, its feature
It is the totally-enclosed feeder of Weighing type to be the feeder；The powder collector is bladder type powder recepting device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110694772A (en) * | 2019-10-21 | 2020-01-17 | 大峘集团有限公司 | Production process of slag and steel slag micropowder |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110694772A (en) * | 2019-10-21 | 2020-01-17 | 大峘集团有限公司 | Production process of slag and steel slag micropowder |
| CN110694772B (en) * | 2019-10-21 | 2021-03-30 | 大峘集团有限公司 | Production process of slag and steel slag micropowder |
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