CN203639481U - Coal injection device for blast furnace - Google Patents
Coal injection device for blast furnace Download PDFInfo
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- CN203639481U CN203639481U CN201320891932.0U CN201320891932U CN203639481U CN 203639481 U CN203639481 U CN 203639481U CN 201320891932 U CN201320891932 U CN 201320891932U CN 203639481 U CN203639481 U CN 203639481U
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- 239000003245 coal Substances 0.000 title claims abstract description 176
- 238000002347 injection Methods 0.000 title claims abstract description 51
- 239000007924 injection Substances 0.000 title claims abstract description 51
- 239000000843 powder Substances 0.000 claims abstract description 48
- 239000002994 raw material Substances 0.000 claims abstract description 19
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Abstract
The utility model provides a blast furnace coal injection device, the device includes: the device is sequentially connected with a combustion improver raw material bin (1), an ultra-fine grinding machine (3), a spiral metering pump (6), a weighing coal feeder (8), a coal mill (9), a powder collector (14) and a pulverized coal bin (16), and the outlet end of the spiral metering pump is provided with a Laval pipe (19); wherein the weighing coal feeder (8) is also connected with the raw coal bin (7). The device realizes reducing the ignition point of the pulverized coal, quickening the combustion efficiency of the pulverized coal in front of the blast furnace tuyere, improving the coal ratio of the blast furnace, reducing the coke ratio and improving the comprehensive economic benefit of the blast furnace coal injection.
Description
Technical field
The utility model belongs to iron and steel metallurgical industry, specifically, relates to a kind of coal powder injection apparatus of blast furnace.
Background technology
From traditional Steel Production Flow Chart, ironmaking system is one of main power consumption operation, accounts for 70% of Iron and Steel Production total energy consumption.In order to reduce ironmaking energy consumption, to reduce disposal of pollutants and increase economic efficiency, blast furnace ironmaking extensively adopts coal injection technology both at home and abroad, to reduce coke consumption.And a large amount of theoretical investigationes and practice show, coal dust is in tuyere zone rate of combustion less than 70% left and right, and along with injecting coal quantity increases, the coal combustion rate in convolution district, air port can reduce gradually.Remaining unburned coal powder enters body of heater, can cause the coke ventilation property of cohesive zone to decline, and has reduced gas utilization rate, also has part to be taken out of blast furnace by the Gas Flow of high-speed motion, causes the carbon content in gas dedusting ash to increase, and causes resource and energy dissipation.Comprehensive analysis, the running status of blast furnace ironmaking high energy consumption, a very large part is low the causing of efficiency of combustion by coal dust.Therefore, keep good coal dust to utilize situation, just must make coal dust in tuyere zone moment burning and gasification, and how to improve before air port Combustion Efficiency of Coal Powder become blast furnace and increase that coal compares and the restrictive factor of briquet replacing coke.
Pulverized coal injection combustion-supporting and energy-saving technology is effectively to improve a power-saving technology of coal dust firing.The core of this power-saving technology is selection and the preparation of coal dust ignition dope.At present, in domestic market, the combustion-supporting product of pulverized coal injection is more, mainly concentrates on rare earth oxide, alkalimetal oxide, alkaline earth metal oxide, rare earth oxide, potassium permanganate, MnO
2, muriate and some mineral etc.These materials all can play a role to strengthening coal combustion, but due to pulverized coal injection catalytic combustion-supporting understanding Shortcomings, often occur the problems such as catalyst loading is large, cost is expensive in the whole bag of tricks, and industrial practical effect is also not obvious.Minority solid catalysis ignition dope (as villaumite, nitrate or receive, sylvite type etc.), though can obviously reduce the addition of ignition dope, has corrosive nature to blast-furnace equipment and gas line etc., and it is unfavorable even smooth operation of furnace to be produced.
In general, the subject matter that pulverized coal injection combustion supporting technology exists has: the major function of (1) coal dust ignition dope is to reduce coal powder ignition point and improves efficiency of combustion, it is how many that its katalysis does not lie in ignition dope, key is that coal dust surface attachment ignition dope number of particles is how many, thus solve catalyzer receive Technique for Preparing Fine and with the dispersion technology that adheres to of coal dust be crucial; (2) because coal dust ignition dope is disposable consumption-type catalyzer, large-scale industrial application, must reduce ignition dope preparation cost and consumption; (3) composition of coal dust ignition dope is all relevant with coal with proportioning, and ignition dope needs special coal special, could bring into play combustion-supporting effect largelyr; (4) performance of the efficient effect of ignition dope is also the design of combustion-supporting system, and good equipment is the efficient performance guarantee of pulverized coal injection combustion supporting technology, can lose equally combustion-supporting and energy-saving effect if addition means is incorrect.
Utility model content
The purpose of this utility model is to provide a kind of coal powder injection apparatus of blast furnace.Coal powder injection apparatus of blast furnace of the present utility model can reduce coal powder ignition point, accelerates the front Combustion Efficiency of Coal Powder of blast-furnace tuyere, improves blast furnace coal ratio and reduces coke ratio, promotes pulverized coal injection overall economic efficiency.
For reaching above-mentioned purpose, the utility model provides a kind of coal powder injection apparatus of blast furnace, and the utility model is on the basis of original bf coal injection system, has increased preparation and the jettison system of ignition dope, can ensure ignition dope quality and strengthen combustion-supporting effect, effectively having improved the rate of combustion of coal dust.
The utility model coal powder injection apparatus of blast furnace comprises the ignition dope raw material cabin 1, ultra-fine grinding mill 3, spiral volume pump 6, Gravimetric Coal Feeders 8, coal pulverizer 9, powder collector 14 and the Pulverized Coal Bin 16 that are linked in sequence, and spiral volume pump exit end arranges convergent-divergent channel 19; Wherein Gravimetric Coal Feeders 8 also connects run coal bin 7.
Wherein ignition dope is by ignition dope raw material cabin 1, be transported in Gravimetric Coal Feeders 8 via ultra-fine grinding mill 3 and spiral volume pump 6, raw coal is entered in Gravimetric Coal Feeders 8 by run coal bin 7, the raw coal obtaining and the mixture of ignition dope enter coal pulverizer 9 by Gravimetric Coal Feeders 8 outlets, arrived powder collector 14 and Pulverized Coal Bin 16 by sequentially-fed again, spray into blast furnace through injection system.
According to device described in the utility model, wherein the diffraction angle α of the preferred described convergent-divergent channel of the utility model is 45 °-65 °; Its effect can be stablized ignition dope and be added flow and control ignition dope dispersion angle.
According to device described in the utility model, wherein the distance at the medullary ray of the preferred described convergent-divergent channel 19 of the utility model and run coal bin 7 feed opening edges is 20-50cm, and convergent-divergent channel 19 is arranged on the side of run coal bin 7 with respect to coal throughput direction in Gravimetric Coal Feeders 8.
Device described in the utility model, ignition dope adds the near-end that implantation site is run coal bin feed opening, and convergent-divergent channel medullary ray is apart between run coal bin feed opening edge 20～50cm, as shown in Figure 2, ignition dope can be added in run of mine coal seam, and because raw coal blanking inertia can cover ignition dope.
As shown in Figure 2.Ignition dope is added in run of mine coal seam, and because raw coal blanking inertia can be covered by ignition dope, better to contact with ignition dope.
Be understandable that, when the throughput direction of coal in Gravimetric Coal Feeders 8 is for to the right time, convergent-divergent channel 19 is arranged on the right side of run coal bin 7; Otherwise be left side.
According to device described in the utility model, wherein the utility model preferably arranges seal fan 13 on coal pulverizer 9, and first row blower fan 18 is set on powder collector 14.
According to device described in the utility model, wherein between the preferred ignition dope raw material cabin 1 of the utility model and ultra-fine grinding mill 3, screw feeder 2 is also set, for ignition dope is transported to ultra-fine grinding mill 3 by ignition dope raw material cabin 1.
According to device described in the utility model, wherein between the preferred ultra-fine grinding mill 3 of the utility model and spiral volume pump 6, ignition dope hold-up vessel 4 is also set, for ignition dope is transported to spiral volume pump 6 by ultra-fine grinding mill 3;
According to device described in the utility model, wherein the utility model further preferably also arranges second row blower fan 5 on ignition dope hold-up vessel 4.
According to device described in the utility model, wherein on the preferred described coal pulverizer 9 of the utility model, heating furnace 10 is set, coal pulverizer 9 is connected by pipeline with heating furnace 10;
According to device described in the utility model, the utility model further arranges diffusion valve 11 and cold blast valve 12 on preferred described pipeline.
According to device described in the utility model, wherein the utility model preferably also arranges wood scraps separator 15 between powder collector 14 and Pulverized Coal Bin 16, and wood scraps separator 15 is connected with Pulverized Coal Bin 16 with powder collector 14 respectively by pipeline.
According to device described in the utility model, wherein the preferred described Gravimetric Coal Feeders 8 of the utility model is closed Gravimetric Coal Feeders.
Between aforesaid device, can use as required pipeline or conveying belt to connect.
Related other the concrete equipment of injection system of the utility model are conventional prior art equipment as coal rifle etc., and the utility model is not described in detail and illustrates.
It is carrier gas that device described in the utility model uses air, and then the ignition dope finished product preparing is joined to closed coal supply weigher by high-precision spiral weigher through air conveying to ignition dope storage warehouse, on belt, mixes with raw coal.And the chain control of weighing of high-precision spiral weigher and raw coal weigher, realizes and accurately controls ignition dope and raw coal quality proportioning.
Blast-furnace coal-injection combustion improver of the present utility model, in application, in order to make ignition dope and coal dust have more abundant duration of contact, need to reduce top hole pressure and the cloth bag collection machine top hole pressure of coal pulverizer.Be original coal pulverizer top hole pressure be-6.5kPa, add coal pulverizer top hole pressure after ignition dope about-5kPa.
Wherein can be specially: pulverized coal injection combustion supporting technology of the present utility model is to be delivered to ignition dope raw material cabin 1 after each raw material is mixed, and enters ultra-fine grinding mill 3 fully grind through screw feeder 2.When the granularity of ignition dope is during at-0.010mm>90%, with air be carrier gas, through air conveying, to ignition dope storage warehouse 4, carrier gas is diffused through main exhaust fan 5.Ignition dope joins closed coal supply weigher 8 by high-precision spiral weigher 6, on the belt of closed coal supply weigher 8, mixes with raw coal.Wherein, high-precision spiral weigher 6 carries out chain control with raw coal weigher 8, realizes and accurately controls ignition dope and raw coal quality proportioning.Ignition dope and raw coal grind and complete the modification to coal dust surface in medium speed mill 9.Finished product coal dust is air conveying to Pulverized Coal Bin 16 through nitrogen, enters blast-furnace roasting by injection system.
The ignition dope that the utility model uses can be any ignition dope of prior art, for example the utility model provides a kind of blast-furnace coal-injection combustion improver, described ignition dope main raw material is become to be grouped into by following weight percent: blast furnace dust 5%-15%, ore deposit groove ash 10%-20%, rhombspar 10%-25%, converter dust 30%-50%, Wingdale 20%-40%.
The ignition dope providing is the coal powder injection additive of the multiple mineral elements such as a kind of Ca of being rich in, Fe, Mg, mainly utilizing metallurgical mineral and iron and steel waste is raw material, as carrying out component, Wingdale, rhombspar, blast furnace dust, sintering dust, converter dust etc. preferably and are again processed into coal dust ignition dope, then in pulverized coal preparation process, complete coal dust surface modification, realize the combustibility that reduces coal powder ignition point and improve coal dust.
According to described ignition dope, further preferred described ignition dope main raw material is become to be grouped into by following weight percent: blast furnace dust 5%-10%, ore deposit groove ash 10%-15%, rhombspar 10%-25%, converter dust 20%-40%, Wingdale 30%-40%;
According to described ignition dope, further preferred described ignition dope main raw material is become to be grouped into by following weight percent: blast furnace dust 10%-15%, ore deposit groove ash 10%-20%, rhombspar 10%-15%, converter dust 30%-50%, Wingdale 20%-30%;
According to described ignition dope, described ignition dope comprises following weight percent composition: CaO5%～15%, MgO5%～15%, CaCO
315%～35%, Fe
2o
330%～40%, Al
2o
3<8%, FeO<10%, SiO
2<2%, K<0.1%, Na<0.1%, Pb<0.1%, Zn<0.1%.
According to described ignition dope, described ignition dope is that above-mentioned raw materials is fully mixed, and the ignition dope mass content that is then ground to granularity and is below diameter 0.01mm is greater than 90%;
Wherein further preferably grind after 2-5 hour and be prepared from.
According to described ignition dope, the granularity of described ignition dope is to be greater than 90% below diameter 0.01mm.
The described prior art routine operation that is ground to, after for example preferably above-mentioned raw materials fully being mixed, enters into ultra-fine grinding mill by screw feeder and grinds.The application of blast-furnace coal-injection combustion improver of the present utility model is that ignition dope and raw coal are mixed and ground in medium speed mill.Because ignition dope particle surface is positive polarity and alkalescence, and pulverized coal particle surface is electronegativity and slightly acidic, and surface adsorption and acid-base reaction can occur in the two contact, thereby in raw coal process of lapping, can complete coal dust surface modification.Finished product coal dust after modification is transported to Pulverized Coal Bin with nitrogen, then in injection system enters blast furnace, burns.
Described blast furnace dust, ore deposit groove ash, rhombspar, converter dust, Wingdale are this area Essential Terms, are now further explained as follows:
Blast furnace dust: the bag-type dust ash that refers to top gas;
Ore deposit groove ash: the dedusting ash that refers to sintering plant feed proportioning system workspace;
Converter dust: refer to converter gas dry method dust ash.
In sum, the utility model provides a kind of coal powder injection apparatus of blast furnace.Coal powder injection apparatus of blast furnace tool of the present utility model has the following advantages:
Coal powder injection apparatus of blast furnace of the present utility model has solved ignition dope and has well adhered to and disperse on coal dust surface, can effectively improve air port coal combustion rate and increase blast furnace the ability that digests coal dust, and present method also can play stable furnace condition, improve the effects such as molten steel quality and output, to blast-furnace equipment without destroying infection.
Accompanying drawing explanation
Fig. 1 is coal powder injection apparatus of blast furnace of the present utility model, and wherein 1 is ignition dope raw material cabin; 2 is screw feeder; 3 is ultra-fine grinding mill; 4 is ignition dope hold-up vessel; 5 is main exhaust fan; 6 is spiral metering scale; 7 is run coal bin; 8 is closed Gravimetric Coal Feeders; 9 is coal pulverizer; 10 is heating furnace; 11 is diffusion valve; 12 is cold blast valve; 13 is seal fan; 14 is cloth bag collection machine; 15 is wood scraps separator; 16 is Pulverized Coal Bin; 17 for unloading coal dust mouth; 18 is main exhaust fan.
Fig. 2 is the partial schematic diagram of coal powder injection apparatus of blast furnace of the present utility model, and wherein 4 is ignition dope hold-up vessel; 6 is spiral metering scale; 7 is run coal bin; 8 is closed Gravimetric Coal Feeders; 19 is convergent-divergent channel.
Fig. 3 is the enlarged diagram of convergent-divergent channel, and α is diffraction angle.
Fig. 4 is the feed intake curve of ignition dope while joining belt, and wherein 1 is the common curve that feeds intake of prior art, and 2 are added with the curve that feeds intake of convergent-divergent channel for the utility model.
Embodiment
Describe below the beneficial effect of implementation process of the present utility model and generation by specific embodiment in detail, be intended to help reader to understand better essence of the present utility model and feature, not as restriction that can practical range to this case.
Coal powder injection apparatus of blast furnace of the present utility model, as Figure 1-3: ignition dope raw material cabin 1, screw feeder 2, ultra-fine grinding mill 3, ignition dope hold-up vessel 4, second row blower fan 5 is set on ignition dope hold-up vessel 4, spiral volume pump 6, run coal bin 7, closed Gravimetric Coal Feeders 8, coal pulverizer 9, powder collector 14, wood scraps separator 15 and Pulverized Coal Bin 16, spiral volume pump exit end arranges convergent-divergent channel 19, seal fan 13 is set on coal pulverizer 9, and first row blower fan 18 is set on powder collector 14, heating furnace 10 is set on coal pulverizer 9, coal pulverizer 9 is connected by pipeline with heating furnace 10, on this pipeline, order arranges diffusion valve 11 and cold blast valve 12, the diffraction angle α of convergent-divergent channel is 62 °, the distance at the medullary ray of convergent-divergent channel 19 and run coal bin 7 feed opening edges is 22cm, and convergent-divergent channel 19 is arranged on the right side of run coal bin 7.
Ignition dope is by ignition dope raw material cabin 1, via screw feeder 2, ultra-fine grinding mill 3, ignition dope hold-up vessel 4 and spiral volume pump 6, and be transported in Gravimetric Coal Feeders 8 by the convergent-divergent channel 19 of spiral volume pump 6 exit end settings, raw coal is entered in Gravimetric Coal Feeders 8 by run coal bin 7, the raw coal obtaining and the mixture of ignition dope enter coal pulverizer 9 by Gravimetric Coal Feeders 8 outlets, arrived powder collector 14 by sequentially-fed again, enter Pulverized Coal Bin 16 by wood scraps separator 15, then jet via coal rifle.
Adopt certain 500m of steel mill
3blast furnace carries out the combustion-supporting test of coal powder injection, take 15 days as one test period, investigates ignition dope to pulverized coal injection combustion-supporting and energy-saving effect.Winding-up coal is certain hard coal.
The ignition dope of testing for 1 phase uses blast furnace dust approximately 10%, ore deposit groove ash approximately 10%, rhombspar approximately 20%, converter dust approximately 20%, Wingdale approximately 40%.Comprehensive composition is: CaO approximately 10%, MgO approximately 10%, CaCO
3approximately 35%, Fe
2o
3approximately 30%, Al
2o
3approximately 8%, FeO approximately 5%, other are approximately 2% years old.
The ignition dope of testing for 2 phases uses blast furnace dust approximately 5%, ore deposit groove ash approximately 15%, rhombspar approximately 10%, converter dust approximately 40%, Wingdale approximately 30%.Comprehensive composition is: CaO approximately 8%, MgO approximately 5%, CaCO
3approximately 32%, Fe
2o
3approximately 35%, Al
2o
3approximately 5%, FeO approximately 8%, other are approximately 2% years old.
Before test, blast furnace index is when base period: coal is than 179kg/tFe, coke ratio 359kg/tFe, oxygen enrichment percentage 3.2%.Trial period, by closed coal supply weigher carry raw coal quality 3% add ignition dope, test-results and original production index contrast as following table 1, its economic benefit be 12 yuan/more than tFe.
Table 1, the present embodiment test-results and original production index
Coal powder injection apparatus of blast furnace is identical with embodiment 1, and difference is that the diffraction angle α of convergent-divergent channel is 52 °; The distance at the medullary ray of convergent-divergent channel 19 and run coal bin 7 feed opening edges is 31cm.
Adopt certain 450m of steel mill
3blast furnace carries out the combustion-supporting test of coal powder injection, take 15 days as one test period, investigates ignition dope to pulverized coal injection combustion-supporting and energy-saving effect.Winding-up coal is bituminous coal.
The ignition dope of testing for 1 phase uses blast furnace dust approximately 10%, ore deposit groove ash approximately 10%, rhombspar approximately 15%, converter dust approximately 35%, Wingdale approximately 30%.Comprehensive composition is: CaO approximately 10%, MgO approximately 6%, CaCO
3approximately 26%, Fe
2o
3approximately 40%, Al
2o
3approximately 6%, FeO approximately 10%, other are approximately 2% years old.
The ignition dope of testing for 2 phases uses blast furnace dust approximately 15%, ore deposit groove ash approximately 20%, rhombspar approximately 15%, converter dust approximately 30%, Wingdale approximately 20%.Comprehensive composition is: CaO approximately 15%, MgO approximately 15%, CaCO
3approximately 16%, Fe
2o
3approximately 40%, Al
2o
3approximately 4%, FeO approximately 8%, other are approximately 2% years old.
Before test, blast furnace index is when base period: coal is than 149kg/tFe, coke ratio 401kg/tFe, oxygen enrichment percentage 2.3%.Trial period, by closed coal supply weigher carry raw coal quality 0.5% add ignition dope, test-results and original production index contrast as following table 2, its economic benefit be 15 yuan/more than tFe.
Table 2, the present embodiment test-results and original production index
Embodiment of the method 3
Coal powder injection apparatus of blast furnace is identical with embodiment 1, and difference is that the diffraction angle α of convergent-divergent channel is 46 °; The distance at the medullary ray of convergent-divergent channel 19 and run coal bin 7 feed opening edges is 46cm.
Adopt certain 750m of steel mill
3blast furnace carries out the combustion-supporting test of coal powder injection, take 10 days as one test period, investigates ignition dope to pulverized coal injection combustion-supporting and energy-saving effect.Winding-up coal is mixed coal for certain, and wherein hard coal accounts for 60%, and bituminous coal accounts for 40%.Equipment is the coal powder injection apparatus of blast furnace of apparatus embodiments 3.
The ignition dope of testing for 1 phase uses blast furnace dust approximately 8%, ore deposit groove ash approximately 12%, rhombspar approximately 21%, converter dust approximately 26%, Wingdale approximately 33%.Comprehensive composition is: CaO approximately 14%, MgO approximately 12%, CaCO
3approximately 25%, Fe
2o
3approximately 33%, Al
2o
3approximately 8%, FeO approximately 6%, other are approximately 2% years old.
The ignition dope of testing for 2 phases is identical with 1 phase of test.
Before test, blast furnace index is when base period: coal is than 161kg/tFe, coke ratio 359kg/tFe, oxygen enrichment percentage 3.2%.Trial period, by closed coal supply weigher carry raw coal quality 1% add ignition dope, test-results and original production index contrast as following table 3, its economic benefit be 10 yuan/more than tFe.
Table 3, the present embodiment test-results and original production index
Experimental example 1
In ignition dope throwing device, after screw feeder, increase convergent-divergent channel.Between 45 °-65 °, can better control the distribution of ignition dope on belt through experimental verification α, increase and raw coal contact area.Excessive and the too small common charging device of diffraction angle adds fashionable, and ignition dope is more concentrated, is unfavorable for fully contacting with raw coal.As shown in Figure 4, the reinforced curve of the convergent-divergent channel of common feeding device and the utility model embodiment 2.Wherein said common feeding device does not fill convergent-divergent channel.
Claims (10)
1. a coal powder injection apparatus of blast furnace, it is characterized in that, described device comprises: the ignition dope raw material cabin (1), ultra-fine grinding mill (3), spiral volume pump (6), Gravimetric Coal Feeders (8), coal pulverizer (9), powder collector (14) and the Pulverized Coal Bin (16) that are linked in sequence, and spiral volume pump exit end arranges convergent-divergent channel (19); Wherein Gravimetric Coal Feeders (8) also connects run coal bin (7).
2. coal powder injection apparatus of blast furnace according to claim 1, is characterized in that, the diffraction angle α of described convergent-divergent channel (19) is 45 °-65 °.
3. coal powder injection apparatus of blast furnace according to claim 1, it is characterized in that, the distance at the medullary ray of described convergent-divergent channel (19) and run coal bin (7) feed opening edge is 20-50cm, and convergent-divergent channel (19) is arranged on the side of run coal bin (7) with respect to the middle coal throughput direction of Gravimetric Coal Feeders (8).
4. coal powder injection apparatus of blast furnace according to claim 1, is characterized in that, seal fan (13) is set on coal pulverizer (9), and on powder collector (14), first row blower fan (18) is set.
5. coal powder injection apparatus of blast furnace according to claim 1, is characterized in that, between ignition dope raw material cabin (1) and ultra-fine grinding mill (3), screw feeder (2) is also set, for ignition dope is transported to ultra-fine grinding mill (3) by ignition dope raw material cabin (1).
6. coal powder injection apparatus of blast furnace according to claim 1, is characterized in that, between ultra-fine grinding mill (3) and spiral volume pump (6), ignition dope hold-up vessel (4) is also set, for ignition dope is transported to spiral volume pump (6) by ultra-fine grinding mill (3).
7. coal powder injection apparatus of blast furnace according to claim 6, is characterized in that, second row blower fan (5) is also set on ignition dope hold-up vessel (4).
8. coal powder injection apparatus of blast furnace according to claim 1, is characterized in that, heating furnace (10) is set on described coal pulverizer (9), and coal pulverizer (9) is connected by pipeline with heating furnace (10).
9. coal powder injection apparatus of blast furnace according to claim 8, is characterized in that, diffusion valve (11) and cold blast valve (12) are set on described pipeline.
10. coal powder injection apparatus of blast furnace according to claim 1, it is characterized in that, between powder collector (14) and Pulverized Coal Bin (16), wood scraps separator (15) is also set, wood scraps separator (15) is connected with Pulverized Coal Bin (16) with powder collector (14) respectively by pipeline.
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| CN201320891932.0U CN203639481U (en) | 2013-12-31 | 2013-12-31 | Coal injection device for blast furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104962339A (en) * | 2015-07-02 | 2015-10-07 | 湖北天合嘉康能源科技有限公司 | High-efficiency combustion supporter of biomass molded fuel and conveyor for biomass molded fuel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104962339A (en) * | 2015-07-02 | 2015-10-07 | 湖北天合嘉康能源科技有限公司 | High-efficiency combustion supporter of biomass molded fuel and conveyor for biomass molded fuel |
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