CN110607407A - Energy-saving and yield-increasing method for preheating agglomerated materials by hot flue gas of blast furnace main channel - Google Patents
Energy-saving and yield-increasing method for preheating agglomerated materials by hot flue gas of blast furnace main channel Download PDFInfo
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- CN110607407A CN110607407A CN201910931080.5A CN201910931080A CN110607407A CN 110607407 A CN110607407 A CN 110607407A CN 201910931080 A CN201910931080 A CN 201910931080A CN 110607407 A CN110607407 A CN 110607407A
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- 239000000463 material Substances 0.000 title claims abstract description 142
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 86
- 239000003546 flue gas Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 302
- 229910052742 iron Inorganic materials 0.000 claims abstract description 151
- 239000000428 dust Substances 0.000 claims abstract description 130
- 239000002893 slag Substances 0.000 claims abstract description 114
- 238000010438 heat treatment Methods 0.000 claims abstract description 93
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 76
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 69
- 239000010959 steel Substances 0.000 claims abstract description 69
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 62
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 62
- KFZAUHNPPZCSCR-UHFFFAOYSA-N iron zinc Chemical compound [Fe].[Zn] KFZAUHNPPZCSCR-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000004484 Briquette Substances 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 238000002844 melting Methods 0.000 claims abstract description 11
- 230000008018 melting Effects 0.000 claims abstract description 11
- 239000000779 smoke Substances 0.000 claims description 93
- 239000011701 zinc Substances 0.000 claims description 67
- 229910052725 zinc Inorganic materials 0.000 claims description 67
- 238000010079 rubber tapping Methods 0.000 claims description 36
- 239000010802 sludge Substances 0.000 claims description 13
- 239000010881 fly ash Substances 0.000 claims description 11
- 230000000630 rising effect Effects 0.000 claims description 10
- 239000002956 ash Substances 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 8
- 238000007885 magnetic separation Methods 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 4
- 239000002910 solid waste Substances 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims 2
- 230000008901 benefit Effects 0.000 abstract description 9
- 238000000926 separation method Methods 0.000 abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 7
- 230000036632 reaction speed Effects 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000011084 recovery Methods 0.000 abstract 1
- 238000009270 solid waste treatment Methods 0.000 abstract 1
- 239000011499 joint compound Substances 0.000 description 50
- 239000002699 waste material Substances 0.000 description 14
- 238000002485 combustion reaction Methods 0.000 description 11
- 239000007789 gas Substances 0.000 description 11
- 229910044991 metal oxide Inorganic materials 0.000 description 6
- 150000004706 metal oxides Chemical class 0.000 description 6
- 238000006722 reduction reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 239000011449 brick Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical group [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- -1 and finally Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000010813 municipal solid waste Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
- C21B2100/66—Heat exchange
Abstract
The invention discloses a method for increasing molten iron yield and increasing energy and yield of hot flue gas preheating agglomerate materials during separation and recovery of zinc powder by using a blast furnace main channel to treat the agglomerate materials containing carbon, iron, zinc dust mud agglomerates and/or scrap steel, slag and steel and the like. The invention belongs to the field of dust and mud solid waste treatment and energy conservation and emission reduction. The method is characterized in that a device for heating and preheating the carbon-containing iron-zinc dust mud briquette, the steel scrap, the slag and the like briquette materials is arranged on the main channel of the blast furnace, so that the temperature of the briquette materials added into the main channel is greatly improved. The method has the advantages that the lump materials are heated to high temperature and added into the main channel, partial pre-reduction can be generated in advance, the reaction speed is obviously accelerated, and the reaction and melting time is greatly shortened, so that the treatment capacity of the lump materials added into the main channel can be obviously improved, the energy is effectively saved, the yield of molten iron and the yield of water granulated slag are improved, and the economic and social benefits are increased.
Description
Technical Field
The invention relates to a hot flue gas preheating briquette material energy-saving and yield-increasing method for increasing molten iron yield and separating and recovering zinc powder by utilizing a main ditch in front of an iron-making blast furnace to process briquette materials containing carbon, iron and zinc dust and/or scrap steel slag and the like, in particular to a method for preheating briquette materials by utilizing hot flue gas when an iron storage type main ditch molten iron slag high-temperature molten pool of the blast furnace is used for carrying out carbon-containing iron and zinc dust briquette treatment and/or melting briquette materials containing scrap steel slag and the like to obtain molten iron and volatilize and dezincify, heating and preheating various briquette materials by utilizing the hot flue gas of the main ditch to effectively utilize a large amount of hot flue gas generated by high-temperature slag iron of the main ditch during blast furnace iron discharge and a large amount of hot flue gas generated by combustion flame of carbon-containing iron and zinc dust briquette to improve the temperature of various briquette materials containing carbon, iron and zinc dust briquette materials containing carbon, scrap steel slag and the like added into the main ditch so as to improve the reaction, the method increases the treatment capacity of the agglomerate in the main channel, and finally achieves the purposes of saving energy and improving the yield of molten iron and the yield of granulated slag.
Background
The iron and steel industry produces a large amount of dust and sludge containing iron, zinc and other harmful elements during production. If the material is directly added into sintering for recycling, harmful elements such as zinc, lead, potassium, sodium, alkali metal and the like are continuously and circularly enriched, and the normal production of a blast furnace is seriously influenced. To this end, the Chinese invention patent ZL201410326386.5 discloses a process for reducing agglomerates containing carbon, iron, zinc and the like into molten iron, zinc and the like in a blast furnace iron storage type main channel, and discloses a production process for treating carbon-containing iron-containing or zinc-containing dust mud pellets or briquettes by utilizing molten iron and molten slag high-temperature molten pool jetted from a blast furnace main channel iron mouth to obtain reduced molten metal iron, volatilizing, dezincing, collecting, recovering, separating, removing and recovering molten slag, wherein when the main channel is used for treating the agglomerates containing carbon, iron, zinc and dust mud, the invention patent discloses that the agglomerates are added into the main channel to generate violent reduction reaction, and generate large smoke or dust, the agglomerates react on the iron surface of the iron storage type main channel slag, burn and release heat, supplement reaction heat loss, and show that the agglomerates containing carbon, iron, zinc and mud agglomerates and the like generate primary and secondary combustion reaction in the main channel, the main channel generates glowing flame and releases large amount of heat, not only the heat loss of the reaction of the metal oxides of the lumps is compensated, but also the temperature of the iron slag in the main channel is increased by the redundant heat, and meanwhile, the hot flue gas rising in the main channel is further heated to take away a large amount of heat. Meanwhile, a large amount of heat is also carried away by hot flue gas on a main channel of the blast furnace tapping. The large amount of heat brought away by the hot flue gas is not well utilized, and great waste of energy is caused.
Disclosure of Invention
The purpose of the invention is as follows: the invention provides an energy-saving and yield-increasing method for preheating lump materials by using hot flue gas generated by carbon-containing iron-zinc dust mud lump mass treatment and/or scrap steel slag to increase molten iron yield and separate and recover zinc powder, in particular to an energy-saving and yield-increasing method for preheating various lump materials by using hot flue gas generated by the main channel high-temperature slag iron during blast furnace iron storage type main channel molten iron slag high-temperature molten pool to perform carbon-containing iron-zinc dust mud lump treatment and/or melt the lump materials generated by scrap steel slag and the like to obtain molten iron and volatilize and dezincify, and effectively using a large amount of hot flue gas generated by the main channel high-temperature slag iron during blast furnace iron discharge and treating carbon-containing iron-zinc dust lump combustion flame generated by the carbon-containing iron-zinc dust lump combustion The method has the advantages that the temperature of various lump materials such as carbon-containing iron-zinc dust mud lumps, steel scrap slag, steel slag and the like added into the main channel is increased by a large amount of hot flue gas, so that the reaction speed of the carbon-containing iron-zinc lumps and the melting speed of the lump materials such as the steel scrap slag, the steel scrap slag and the like are increased, the handling capacity of the lump materials is increased, and finally the purposes of saving energy and improving the yield of molten iron and the yield of water granulated slag. The invention utilizes a large amount of hot flue gas generated by high-temperature slag iron in a main ditch when the blast furnace is discharged and a large amount of hot flue gas generated by processing burning flame of carbon-containing iron-zinc dust mud lumps, a device for heating and preheating the carbon-containing iron-zinc dust mud lumps, waste steel slag steel and other lump materials is arranged on the main ditch of the blast furnace, the high-temperature flame hot flue gas passes through the lump materials on the heating and preheating device, the temperature of the lump materials added into the main ditch is greatly improved through heat conduction such as heat radiation, convection heat conduction and the like, even partial substances in the lump materials are partially decomposed or pre-reduced in advance when being heated to high temperature, the lump materials such as the high-temperature dust mud lumps, the waste steel slag steel and the like are added into the main ditch, the reaction speed is remarkably accelerated, the reaction and melting time are greatly shortened, therefore, the processing amount of the lump materials added into the main ditch lumps, the waste steel slag and the like can be remarkably improved, the energy, increasing the economic benefit. The block material preheating device mainly comprises a vibration feeding type with an inclination angle, a rotating cylinder feeding type with an inclination angle, a smoke hood type and a semi-open type, and is mainly provided with an up-down lifting type and a front-back trolley moving type in the moving aspect. Through different combinations of the above various modes, the feeding inclined angle vibration feeding type or inclined angle cylinder feeding type heating device is used for heating block mass materials such as blocks, scrap steel, slag steel and the like to preheat to high temperature, the block mass materials fall into a main ditch smoothly for treatment, and the operation of a tapping machine and a mud gun device can be effectively avoided according to the operation requirement of tapping hole opening plugging without influencing the normal production operation of tapping in front of a furnace. Therefore, the invention heats and preheats the added agglomerate materials such as the main ditch agglomerate, the steel scrap slag, and the like by using the hot flue gas of the main ditch, greatly improves the treatment capacity of the agglomerate materials of the main ditch, can properly reduce the carbon blending quantity of the carbon-containing agglomerate materials, saves more energy, improves the molten iron yield and the water slag yield of the blast furnace, and obtains greater economic benefit and environmental protection benefit when the blast furnace main ditch treats the agglomerate materials such as zinc-containing dust mud, steel scrap slag, and the like.
The technical scheme of the invention is as follows: an energy-saving and yield-increasing method for treating carbon-containing iron-zinc dust mud agglomerate and/or scrap steel slag, steel and other agglomerate materials by using a blast furnace front main channel to increase the yield of molten iron and preheating the agglomerate materials by hot flue gas when zinc powder is separated and recovered. When the blast furnace is cast, hot high-temperature molten iron and molten slag gush out from the iron outlet and are injected into a main channel of the blast furnace, the temperature is as high as 1400-1600 ℃, high-temperature hot flue gas rising from the iron surface of the slag in the main channel, or called smoke dust, takes away a large amount of heat, and particularly when the main channel of the blast furnace is used for treating carbon-containing iron-zinc dust mud briquettes, primary and secondary combustion reaction occurs, the main channel generates hot and dazzling flames, and a large amount of heat is emitted, so that not only is the reaction heat loss of metal oxides in the briquettes supplemented, but also the redundant heat further improves the temperature of the slag in the main channel, and meanwhile, the hot flue gas in the main channel is further heated to take away a large amount of heat, so. A heating and preheating device 2 for lump materials such as carbon-containing iron-zinc dust mud lumps and scrap steel, slag and steel and the like, which are added into a main ditch 1 of a blast furnace, is arranged on the main ditch 1 of the blast furnace, flame burning on the main ditch 1 and rising hot flue gas pass through the lump material heating and preheating device 2, and the lump materials 15 such as the lumps and the scrap steel, which are fed into the vibrating feeding device 3 or the rotating cylinder feeding device 4 from a bin 5, are heated and preheated under the driving rotation of a feeding device vibrator 13 or a feeding device rotating device 14, and the high-temperature lumps and the lump materials 15 such as the scrap steel, slag and the like are uniformly added into the main ditch 1, the carbon-containing iron-zinc dust mud lumps react violently and spray burning flame, and a large amount of heat is released by burning, so that not only the reaction heat loss of the lump metal oxides is supplemented, and the redundant heat raises the temperature of the iron slag in the main ditch 1, the scrap steel and the slag steel are quickly melted, and meanwhile, the rising hot flue gas of the main ditch 1 is heated, and the temperature of the hot flue gas is very high. Hot flue gas sprayed from a taphole passes through a dust hood 6 of a cast house and a dust hood 7, and enters a stokehole dust remover for dust removal through a flue gas pipeline 8, the stokehole dust remover is usually a cloth bag dust remover, iron-containing dust is collected in the stokehole dust remover, falls into an ash hopper at the lower part of the dust remover, is collected and utilized, and the flue gas from which the dust is removed through the stokehole dust remover is exhausted through a fan and a flue gas pipe. When the main ditch 1 is used for treating the zinc-containing dust mud lumps, zinc-containing flue gas generated by the reaction of the lumps is blown to the rear end in the lump material heating and preheating device 2 and is discharged, the zinc-containing flue gas is sucked into the zinc-containing flue gas suction hood 9 and is led out from the zinc-containing flue gas pipeline 10, the zinc-containing flue gas is separately subjected to iron-containing dust separation and removal through the smoke iron-containing dust separation and removal device on the zinc-containing flue gas pipeline 10, the iron-containing dust is smoothly separated from the smoke dust, and finally, iron-containing dusts with different zinc contents and a low-iron high-zinc secondary zinc oxide powder are respectively obtained in the separation and removal device and each dust hopper.
The agglomerated material 15 includes: carbon-containing iron-containing or zinc-containing dust and sludge agglomerates, scrap steel, slag steel, granular iron, small iron, magnetic separation iron agglomerates, direct reduction iron, red mud and other various metallurgical slags, iron-containing dust and sludge solid waste agglomerate materials and sludge, dedusting ash and incineration fly ash solid waste agglomerate materials, namely various pelletized granular blocky carbon-containing and/or carbon-free agglomerate materials. The best position of the main ditch 1 for adding the lump material 15 is the vortex position before the iron falling point of the molten iron at the front end of the main ditch 1, according to the melting degree of the slag shell on the surface of the rear section in the main ditch 1, the lump material 15 can be timely added into the rear section in the main ditch 1 to keep the slag shell in the main ditch 1, the lump material 15 added into the main ditch 1 is prevented from remaining in the main ditch 1, or a high-temperature-resistant object is arranged on the slag iron surface of the rear section in the main ditch 1, the lump material 15 added into the main ditch 1 is prevented from remaining in the main ditch 1, and the lump material 15 in the main ditch is prevented from flowing into the slag ditch along with slag flow.
The system for heating and preheating the agglomerate material by the hot flue gas of the heating and preheating device 2 mainly has the following modes: 1. a movable trolley type vibration feeding type (shown in figure 1) with a smoke hood, a vibration feeding type heating preheating feeder 3 with an inclination angle is arranged in the smoke hood of the heating preheating device 2, the feeder 3 can be designed into a vibrating screen mode, hot smoke can heat and preheat the block mass material 15 on the bottom plate conveniently, the lump material 15 in the feeder 3 is vibrated to move forwards by the vibration of the feeder vibrator 13 and is fed to the main ditch 1, the hot flue gas heats and preheats the lump material 15 on one hand, and is smoothly guided to the rear end of the main ditch 1 on the other hand, is sucked into the zinc-containing flue gas dust hood 9 and enters the zinc-containing flue gas pipeline 10, when the plugging is needed, the heating preheating device 2 is moved backwards by the trolley driving mechanism 11 to avoid the rotating plugging operation of the plugging mud gun, and similarly, when the tapping machine needs to tap the iron notch, the heating and preheating device 2 is further moved backwards by the trolley driving mechanism 11 so as to avoid the tapping machine from tapping the iron notch; 2. the lifting type vibration feeding type (see figure 2) with the smoke hood lifts the heating preheating device 2 by means of a lifting mechanism 12 so as to avoid the rotary plugging operation of a plugging mud gun and the tapping operation of a tapping machine; 3. the working principle of the vibrating feeder is similar to that of the mode 1 and the mode 2, because the bottom plate of the feeder 3 is fully distributed with the lump materials 15, hot smoke under the bottom plate heats and preheats the lump materials 15, and on one hand, the hot smoke is easily guided to the rear end of the main ditch 1, is sucked into a smoke dust hood 9 containing zinc and enters a smoke pipeline 10 containing zinc; 4. the rotary cylinder type feeding type with the smoke hood is characterized in that a rotary cylinder type heating and preheating feeder 4 with an inclination angle is installed in the smoke hood of the heating and preheating device 2, a rotary cylinder can be designed into a rotary screen type, hot smoke gas can heat and preheat block mass materials 15 in the rotary cylinder conveniently, the rotary cylinder type heating and preheating feeder 4 with the inclination angle drives the rotary device 14 to rotate so that the block mass materials 15 in the rotary cylinder feeder 4 are overturned, rolled and moved forwards, and feed is carried out on a main ditch 1, and a trolley type (shown in a figure 4) and a lifting type are moved in a separated mode; 5. the feeding type of the cylindrical screen without the upper sealing cover plate is divided into a moving trolley type and a lifting type, the working principle of the feeding type is similar to that of the mode 4, the heating preheating device 2 is also provided with the rotary cylindrical heating preheating feeder 4 with an inclination angle, and the feeder 4 is driven by the rotary device 14 to rotate to feed the main channel 1.
The heating preheating device 2 moves backwards through the trolley driving mechanism 11 or is lifted by the lifting mechanism 12, and the normal taphole plugging opening operation of the stokehole mud gun and the tapping machine is not hindered. When the molten iron is completely discharged from the iron notch and the smoke dust is greatly sprayed, the zinc-containing smoke pipeline valve 16 is closed to prevent a large amount of smoke dust at the iron notch from entering the zinc-containing smoke dust hood 9 and being sucked into the zinc-containing smoke pipeline 10, similarly, when the iron notch is opened for tapping, the zinc-containing smoke pipeline valve 16 is in a closed state, and the smoke dust which is greatly sprayed from the iron notch is also completely collected from the front end dust hood 7 and is sucked into the total smoke pipeline 8 and enters a front dust remover of the furnace.
The invention has the beneficial effects that: the invention utilizes a large amount of hot flue gas generated by high-temperature slag iron in a main ditch during blast furnace tapping and a large amount of hot flue gas generated by processing burning flame of carbon-containing iron-zinc dust mud lumps, a device for heating, preheating and adding the carbon-containing iron-zinc dust mud lumps, waste steel slag steel and other lump materials in the main ditch is arranged on the main ditch of the blast furnace, the temperature of the lump materials is greatly improved, the lump materials are added into the main ditch when being heated to high temperature, even partial substances are partially decomposed or pre-reduced in advance, the reaction speed of the lump materials is obviously accelerated, the reaction and melting time is greatly shortened, thereby not only obviously improving the processing amount of the lump materials added into the main ditch lumps, waste steel slag and the like, but also reducing the carbon content of the carbon-containing lump materials, effectively saving energy, improving the yield of molten iron and the yield of water slag, opening up a new way for improving the yield of the blast furnace, and enabling the blast furnace main ditch to process the lump materials containing zinc dust mud, waste steel slag steel and the like to obtain greater economic benefits and environmental benefits, meanwhile, the heating and preheating device presses the high-temperature hot flue gas rising from the main channel, the heat radiation of the hot flue gas is reduced, the temperature in the smoke hood of the casting house is reduced, and the working environment in the smoke hood is improved.
Drawings
FIG. 1 is a schematic diagram of a hot flue gas heating and block mass preheating system of a mobile trolley type vibrating feeder with a hood
FIG. 2 is a schematic diagram of a hot flue gas heating and block mass preheating system of a lifting type vibrating feeder with a hood
FIG. 3 is a schematic diagram of a system for heating and preheating block mass materials by hot flue gas of an open mobile trolley type vibrating feeder
FIG. 4 is a schematic diagram of a system for preheating a lump material by heating hot flue gas of a rotary cylinder feeder of a moving trolley with a hood
In the above drawings, 1-blast furnace main ditch, 2-lump material heating and preheating device, 3-vibration feeding type heating and preheating feeder, 4-rotation cylinder type heating and preheating feeder, 5-storage bin, 6-furnace front smoke hood, 7-dust hood, 8-total smoke pipeline, 9-zinc-containing smoke suction hood, 10-zinc-containing smoke pipeline, 11-trolley driving mechanism, 12-lifting mechanism, 13-vibration feeding type heating and preheating feeder vibrator, 14-rotation cylinder type heating and preheating feeder rotating device, 15-lump material and 16-zinc-containing smoke pipeline valve.
Detailed Description
The first embodiment is as follows: at 2600M3The lump mass containing carbon, iron, zinc and the like, which is prepared from carbon-containing blast furnace cloth bag gas ash and zinc-containing steelmaking converter fly ash in the main runner of the blast furnace first iron tapping site, has the block size of about 40mm, and 300 kg of the lump mass 15 is added into a molten iron slag high-temperature molten pool of the main runner before tapping, as shown in figure 1. When an iron notch is opened for tapping, according to the conditions of molten iron and molten slag, carbon-containing iron-zinc block masses and slag steel granular iron materials 15 are continuously added into a molten iron molten slag high-temperature molten pool before a molten iron dropping point of a main runner 1 for processing, meanwhile, the moving trolley type block mass material heating and preheating device 2 with the smoke hood is moved forwards to a dust mud ball adding position by virtue of the trolley driving mechanism 11, smoke dust in a ball adding processing area of the main runner 1 is covered, the smoke gas or the smoke dust flows backwards, and a newly added zinc-containing smoke gas pipeline valve 16 is opened. The briquettes react and melt rapidly in the main channel molten iron and molten slag high-temperature molten slag pool along with the tumbled high-temperature molten iron and the molten slag to generate a large amount of smoke dust, the reduced iron becomes molten iron and is melted into blast furnace molten iron, the melted slag and the molten slag in the main channel enter a slag washing channel together to become water slag, the water slag is separated and removed instantly and recovered, elements such as zinc and the like are reduced to form smoke dust, the smoke dust is sucked into a zinc-containing smoke dust suction hood 8 newly added in a front smoke hood 6 of the furnace, and the smoke dust and the iron-containing dust are separated and removed in a smoke dust and iron-containing dust separation and removal. The smoke dust with high dust concentration sprayed out from the iron notch is sucked into a dust hood 7 at the front end of the stokehole smoke 6, passes through a total smoke gas pipeline 8, and still enters a stokehole dust remover together with the smoke dust at other dust suction points for dust removal. Hot molten iron and slag from blast furnaceThe hot smoke gas which is emitted from the tap hole and is injected into a main channel of the blast furnace, the temperature is as high as 1400-1600 ℃, the high-temperature hot smoke gas rising on the slag iron surface of the main channel takes away a large amount of heat, and particularly when the main channel of the blast furnace is used for treating carbon-containing iron-zinc dust mud lumps, primary and secondary combustion reactions occur, and the main channel emits a glowing flame to emit a large amount of heat. A heating and preheating device 2 for lump materials such as carbon-containing iron-zinc dust mud lumps and waste steel slag and steel is arranged on a blast furnace main ditch 1, flame burnt on the main ditch 1 and rising hot flue gas pass through a vibrating feeding type heating and preheating feeder 3 with an inclination angle in the lump material heating and preheating device 2, lump materials 15 such as lumps fed into the vibrating feeding type feeder 3 from a bin 5 and waste steel slag and steel are heated and preheated under the vibration of a feeder vibrator 13, the preheated lump materials 15 such as high-temperature lumps and waste steel slag and steel are uniformly added into the main ditch 1, the carbon-containing iron-zinc dust mud lumps 15 are violently reacted and jet combustion flame, a large amount of heat is released by combustion, not only the reaction heat loss of lump metal oxides is supplemented, but also the redundant heat can improve the slag iron temperature of the main ditch 1, the lump materials 15 such as waste steel slag and steel are rapidly melted, and simultaneously, the hot flue gas of the main channel 1 is heated, and the temperature of the hot flue gas is very high. Hot flue gas sprayed from a taphole passes through a dust hood 6 of a cast house and a dust hood 7, and enters a stokehole dust remover for dust removal through a flue gas pipeline 8, the stokehole dust remover is usually a cloth bag dust remover, iron-containing dust is collected in the stokehole dust remover, falls into an ash hopper at the lower part of the dust remover, is collected and utilized, and the flue gas from which the dust is removed through the stokehole dust remover is exhausted through a fan and a flue gas pipe. When the main ditch 1 is used for treating the zinc-containing dust mud lumps, zinc-containing flue gas generated by the reaction of the lumps is blown to the rear end in the lump material heating and preheating device 2 and is discharged, the zinc-containing flue gas is sucked into the zinc-containing flue gas suction hood 9 and is led out from the zinc-containing flue gas pipeline 10, the zinc-containing flue gas is separately subjected to iron-containing dust separation and removal through the smoke iron-containing dust separation and removal device on the zinc-containing flue gas pipeline 10, the iron-containing dust is smoothly separated from the smoke dust, and finally, iron-containing dusts with different zinc contents and a low-iron high-zinc secondary zinc oxide powder are respectively obtained in the separation and removal device and each dust hopper. The agglomerated material 15 includes: carbon-containing iron-zinc dust mud agglomerate, scrap steel, slag steel, granular iron and small iron pellet-shaped agglomerateAnd (5) feeding. The best position of the main ditch 1 for adding the lump material 15 is the vortex position before the iron falling point of the molten iron at the front end of the main ditch 1, the scrap steel slag steel granular iron small iron lump material 15 is timely added at the rear section of the main ditch 1 according to the melting degree of the slag shell on the surface of the rear section in the main ditch 1 so as to keep the slag shell in the main ditch 1, block the lump material 15 added in the main ditch 1 from remaining in the main ditch 1 and avoid the lump material 15 floating on the slag iron surface of the main ditch from flowing into the slag ditch along with the slag flow. FIG. 1 is a block mass material preheating system by hot flue gas heating of a trolley type vibrating feeder with a hood, a vibrating feeding type heating preheating feeder 3 with an inclination angle is installed in the hood of a heating preheating device 2, the feeder 3 is designed to be in a vibrating screen mode so as to heat the block mass material 15 on a preheating bottom plate by the hot flue gas, the block mass material 15 in the feeder 3 is vibrated to move forwards and feed to a main ditch 1, on one hand, the hot flue gas heats the preheating material and is smoothly guided to the rear end of the main ditch 1 on the other hand, a zinc-containing flue gas suction hood 9 is sucked into a zinc-containing flue gas pipeline 10, when the opening needs to be blocked, the heating preheating device 2 is moved backwards by a trolley driving mechanism 11 so as to avoid the rotary blocking operation of a blocking mud gun, when the molten iron is discharged and the iron hole is large in the zinc-containing flue gas dust, a zinc-containing flue gas pipeline valve 16 is closed so as to prevent the iron, is sucked into a zinc-containing flue gas pipeline 10; similarly, when tapping operation of the tapping machine is required, the heating and preheating device 2 is further moved backwards by the trolley driving mechanism 11 to avoid the tapping operation of the tapping machine, when the tapping is performed, smoke and dust are greatly sprayed, the zinc-containing smoke and dust pipeline valve 16 is in a closed state, and the smoke and dust which are greatly sprayed are also all collected from the front end dust hood 7, sucked into the total smoke and dust pipeline 8 and enter a dust remover in front of the furnace.
Example two: at 1800M3The carbon-containing and iron-containing briquettes made of coking carbon-containing fly ash, electric furnace fly ash with high zinc content and red mud are used in the main channel of the blast furnace No. II casting house, the lumpiness is about 40mm, and 200 kg of briquettes 15 are added into a molten iron slag high-temperature molten pool of the main channel before tapping, as shown in figure 2. When an iron notch is opened for tapping, according to the conditions of molten iron and molten slag, carbon-containing iron-containing briquettes and magnetic separation iron briquettes, red mud incineration fly ash and other iron-containing dust mud and coal dust pressed carbon-containing briquette materials 15 are continuously added into a molten iron and molten slag high-temperature molten pool at the front section of a main channel for treatment,meanwhile, the smoke-hood-mounted lifting vibration feeding type heating preheating device 2 suspended on the top of the main channel 1 is put down downwards, the heating preheating device 2 covers smoke dust in the ball adding processing area, the smoke or the smoke dust flows backwards, and a newly added zinc-containing smoke pipeline valve 16 is opened. Like the embodiment, the device for heating and preheating the carbon-containing iron-zinc dust sludge agglomerate, the magnetic separation iron briquette and the carbon-containing agglomerate material 2 is arranged on the main ditch 1 of the blast furnace, the flame burning on the main ditch 1 and the rising hot flue gas heat and preheat the agglomerate material 15 fed into the vibration feeding type feeder 3 from the storage bin 5, the high-temperature agglomerate material 15 which is preheated by heating is uniformly added into the main ditch 1, the carbon-containing iron-zinc dust sludge agglomerate and the carbon-containing agglomerate 15 react violently and are jetted out to burn flame, and a large amount of heat is released by burning, so that not only is the reaction heat loss of the metal oxide agglomerates supplemented, but also the redundant heat can improve the slag iron temperature of the main ditch 1, the agglomerate materials 15 such as the magnetic separation iron briquette and the like are rapidly melted, meanwhile, the hot flue gas of the main ditch 1 is heated, and the temperature of the hot flue gas is. The agglomerated material 15 includes: carbon-containing iron-zinc dust sludge agglomerate made of electric furnace ash, red mud and the like, slag steel, magnetic separation iron briquette, red mud incineration fly ash and other iron-containing dust sludge and coal dust pressed into carbon-containing agglomerate material. According to the melting degree of the slag shell on the surface of the rear section in the main runner 1, a whole block of high-temperature-resistant high-alumina brick is arranged on the slag iron surface of the rear section in the main runner 1, and the lump material 15 is added in time before the high-temperature-resistant high-alumina brick to keep the slag shell in the main runner 1, so that the lump material 15 added in the main runner 1 is prevented from remaining in the main runner 1, and the lump material 15 floating on the slag iron surface of the main runner is prevented from flowing into the slag runner along with slag flow. Fig. 2 is a system for heating and preheating block mass materials by hot flue gas of a lifting vibrating screen feeder with a smoke hood, wherein the block mass material heating and preheating device 2 avoids the operation of blocking a hole by rotating a clay gun, does not influence the iron blocking hole of the clay gun, and only needs to be lifted by the heating and preheating device 2 by the lifting mechanism 12 so as to avoid the operation of opening a rotary iron-opening hole of an opening machine when a blast furnace opens the iron-opening hole.
Example three: at 1080M3The briquette containing carbon, iron, zinc and the like, which is prepared from carbon-containing blast furnace gas ash and electric furnace dust with high zinc content, in the main channel of the blast furnace first casting house, has the bulk degree of about 35mm, and is shown in figure 4. When the iron notch is opened for tapping, according to the conditions of molten iron and molten slag, the molten iron before the iron point of the main channel is continuously droppedCarbon-containing iron-zinc briquettes, direct reduction iron briquettes, dust mud and garbage incineration fly ash are added into a high-temperature molten slag pool, briquetted materials 15 which are made by isobaric pressing are processed, meanwhile, the movable trolley type cylinder heating and preheating device 2 with the smoke hood is moved forwards to a ball adding position of the dust mud pellets by virtue of a trolley driving mechanism 11, the heating and preheating device 2 covers smoke dust in a ball adding processing area, smoke gas or smoke dust flows backwards, and a newly added zinc-containing smoke gas pipeline valve 16 is opened. Similar to the embodiment, the carbon-containing iron-zinc dust mud agglomerate, the direct reduction iron agglomerate and the dust mud incineration fly ash isobarically manufactured agglomerate material heating and preheating device 2 is arranged on the main ditch 1 of the blast furnace, the flame burnt on the main ditch 1 and the rising hot flue gas heat and preheat the agglomerate material 15 fed into the cylinder feeder 4 from the storage bin 5, the high-temperature agglomerate material 15 preheated by heating is uniformly added into the main ditch 1, the carbon-containing iron-zinc dust mud agglomerate 15 reacts violently and sprays combustion flame, a large amount of heat is released by combustion, not only is the reaction heat loss of the agglomerate metal oxide supplemented, but also the redundant heat can improve the slag iron temperature of the main ditch 1, the agglomerates 15 manufactured by the magnetic separation iron briquette, the dust mud and the incineration fly ash isobarically are melted rapidly, and meanwhile, the hot flue gas of the main ditch 1 is heated, and the temperature of the hot flue gas is very high. The agglomerated material 15 includes: carbon-containing iron-zinc dust and mud block mass prepared from blast furnace gas ash, electric furnace ash and the like, magnetic separation iron block mass, direct reduction iron block mass, dust and mud and waste incineration fly ash and the like. According to the melting degree of the slag shell on the surface of the rear section in the main runner 1, a whole block of high-temperature-resistant high-alumina bricks is arranged on the slag iron surface of the rear section of the main runner 1 so as to prevent the block mass materials 15 added into the main runner 1 from remaining in the main runner 1 and prevent the block mass materials 15 floating on the slag iron surface of the main runner from flowing into the slag runner along with slag flow. FIG. 4 is a block material preheating system by hot flue gas heating of a moving trolley with a hood and a cylinder feeder, wherein the cylinder feeder 4 with an inclination angle is driven by a rotating device 14 to rotate so as to enable the block materials in the cylinder feeder 4 to tumble, roll and move forwards, feed the main ditch 1, and move a heating and preheating device 2 backwards by a trolley driving mechanism 11 so as to avoid the rotary blocking operation of a blocking gun and the tapping operation of a tapping machine; the movable trolley type heating preheating device 2 can move back and forth on the track flexibly to ensure that the front mud gun is not interferedAnd normal taphole plugging and tapping operation of the tapping machine.
The above three embodiments only list the typical specific implementation modes of increasing the molten iron yield by processing the carbon-containing iron-zinc dust mud agglomerate and/or the agglomerate material such as scrap steel, slag and steel and the like by using the main channel in front of the blast furnace and preheating the agglomerate material by using hot flue gas during separating and recovering the zinc powder, and clearly describe various different forms of the heating and preheating device 2 composed of the vibration feeding type and the rotating cylinder feeding type to heat, preheat and add the agglomerate material 15 into the main channel 1 so as to realize specific different implementation forms of energy saving and yield increase. The system for preheating agglomerated materials by heating, which is constituted by the aforementioned heating and preheating device 2, can be implemented by those skilled in the art according to the above embodiments in the following ways, which are in accordance with the spirit of the present invention: 1. the movable trolley type vibration feeding type with the smoke hood is characterized in that a vibration feeding type heating preheating feeder 3 with an inclination angle is installed in the smoke hood of the heating preheating device 2, the heating preheating device is vibrated by a feeder vibrator 13 to feed the main ditch 1, and the heating preheating device 2 is moved backwards by a trolley driving mechanism 11 so as to avoid the rotary plugging operation of a plugging mud gun and the tapping operation of a tapping machine; 2. the lifting type vibration feeding type with the smoke hood lifts the heating preheating device 2 by the lifting mechanism 12 to avoid the rotary plugging operation of a plugging mud gun and the tapping operation of a tapping machine; 3. the open type vibration feeding without an upper sealing cover plate is divided into a mobile trolley type and a lifting type; 4. the rotary cylinder type feeding type with the smoke hood is characterized in that a rotary cylinder type heating preheating feeder 4 with an inclination angle is installed in the smoke hood of the heating preheating device 2, the feeder 4 is driven to rotate by a rotating device 14 to feed the main ditch 1, and the rotary cylinder type heating preheating feeder is divided into a movable trolley type and a lifting type; 5. the rotary cylinder feeding type without upper sealing cover plate is divided into a moving trolley type and a lifting type. The method has the advantages that a large amount of hot flue gas generated by high-temperature slag iron in a main ditch during blast furnace tapping and a large amount of hot flue gas generated by processing combustion flame of carbon-containing iron-zinc dust mud briquettes are used for heating and preheating various briquette materials 15 added into the main ditch 1, the temperature of various briquette materials 15 added into the main ditch 1, such as the carbon-containing iron-zinc dust mud briquettes, waste steel slag steel and the like, is increased to more than 200-1200 ℃ from normal temperature, the reaction speed of the carbon-containing iron-zinc briquette and the melting speed of the briquette materials, such as the waste steel slag steel and the like, are greatly increased, the treatment capacity of the briquette materials in the main ditch is greatly increased, energy is saved, the blast furnace molten iron yield and the water slag yield are increased, and the blast furnace main ditch can treat briquette materials, such as the carbon-containing iron-zinc dust mud, the waste steel slag steel.
Claims (6)
1. A hot flue gas preheating briquette material energy-saving and yield-increasing method for increasing molten iron yield and separating and recovering zinc powder by using a main channel in front of a blast furnace to treat carbon-containing iron-zinc dust mud briquettes, or scrap steel slag steel and other briquette materials is characterized in that: a heating and preheating device (2) containing carbon and iron or containing zinc dust and sludge agglomerates and/or steel scrap and slag steel and other agglomerates is arranged on a main ditch (1) of a blast furnace, flame burning on the main ditch (1) and rising hot flue gas pass through the agglomerates heating and preheating device (2) with an inclined angle to vibrate a feeding preheating feeder (3) or a rotary cylinder type heating and preheating feeder (4), agglomerates and/or steel scrap and slag steel and other agglomerates (15) fed into the vibrating feeding feeder (3) or the rotary cylinder feeding feeder (4) from a storage bin (5) are heated and preheated under the driving of a feeder vibrator (13) vibration or a feeder rotating device (14), the high-temperature agglomerates, steel scrap and slag steel and other agglomerates (15) which are heated and preheated are uniformly added into the main ditch (1), and when the main ditch (1) processes the zinc dust and sludge agglomerates, the zinc-containing flue gas generated by the reaction of the lumps is blown to the rear end in the lump material heating and preheating device (2) and is discharged, sucked into a zinc-containing flue gas dust hood (9) and led out from a zinc-containing flue gas pipeline (10) to collect and utilize zinc-containing and iron-containing substances.
2. The method of claim 1, wherein the method comprises the following steps of: the agglomerated material (15) comprises: carbon-containing iron-containing or zinc-containing dust and sludge agglomerates, scrap steel, slag steel, granular iron, small iron, magnetic separation iron agglomerates, direct reduction iron, red mud and other various metallurgical slags, iron-containing dust and sludge solid waste agglomerate materials and sludge, dedusting ash and incineration fly ash solid waste agglomerate materials, namely various pelletized granular blocky carbon-containing and/or carbon-free agglomerate materials.
3. The method of claim 1, wherein the method comprises the following steps of: the best position for adding the lump material (15) into the main ditch (1) is the vortex position before the iron falling point of molten iron at the front end of the main ditch (1), the lump material (15) is added into the middle and rear sections of the main ditch (1) in due time according to the melting degree of slag shells on the surfaces of the middle and rear sections of the main ditch (1) so as to keep the slag shells in the main ditch (1), the lump material (15) added into the main ditch (1) is prevented from remaining in the main ditch (1), or a high-temperature resistant object is arranged on the slag iron surface of the middle and rear sections of the main ditch (1), the lump material (15) added into the main ditch (1) is prevented from remaining in the main ditch (1), and the lump material (15) floating on the slag iron surface of the main ditch is prevented from flowing into the slag ditch along with slag flow.
4. The method of claim 1, wherein the method comprises the following steps of: the heating preheating device (2) mainly has the following modes: 1. the movable trolley type vibration feeding type with the smoke hood is characterized in that a vibration feeding type heating preheating feeding machine (3) with an inclination angle is installed in the smoke hood of the heating preheating device (2), the feeding machine (3) can be designed into a vibration sieve form, hot smoke can heat and preheat lump materials (15) on a bottom plate of the vibration sieve conveniently, the lump materials (15) in the feeding machine (3) are vibrated to move forwards and feed to a main ditch (1), the hot smoke heats and preheats the lump materials (15) on the one hand, the lump materials are smoothly guided to the rear end of the main ditch on the other hand, a smoke dust hood (9) containing zinc smoke is sucked into a pipeline (10) containing zinc smoke, when the opening needs to be blocked, the heating preheating device (2) is moved backwards by the trolley driving mechanism (11) to avoid the rotary blocking operation of a blocking mud gun, and similarly, when the opening machine needs to be opened with an iron opening, the heating preheating device (2) is further moved backwards by the trolley driving mechanism (11, to avoid the operation of opening the iron notch by rotating the tapping machine; 2. the lifting type vibration feeding type with the smoke hood lifts the heating preheating device (2) by a lifting mechanism (12) to avoid the rotary plugging operation of a plugging mud gun and the rotary tapping operation of a tapping machine; 3. the working principle of the vibrating feeder is similar to that of the mode 1 and the mode 2 because the bottom plate of the feeder (3) is fully distributed with the lump material (15), hot smoke below the bottom plate heats and preheats the lump material (15), and the hot smoke is easily guided to the rear end of the main ditch (1) to be sucked into the smoke dust hood (9) containing zinc and enters the smoke pipeline (10) containing zinc; 4. the rotary cylinder type feeding type with the smoke hood is characterized in that a rotary cylinder type heating and preheating feeder (4) with an inclination angle is installed in the smoke hood of the heating and preheating device (2), a rotary cylinder can be designed into a rolling screen type, hot smoke can heat and preheat block mass materials (15) in the rolling screen of the rotary cylinder conveniently, the rotary cylinder type heating and preheating feeder (4) with the inclination angle is divided into a moving trolley type and a lifting type, and the block mass materials (15) in the rotary cylinder feeder (4) are overturned, rolled and moved forwards through the driving rotation of a rotating device (14) to feed the main ditch (1); 5. the rotary cylinder feeding type without an upper sealing cover plate is divided into a movable trolley type and a lifting type, the working principle of the rotary cylinder feeding type is similar to that of the mode 4, the heating preheating device (2) is provided with the rotary cylinder heating preheating feeding machine (4) with an inclined angle, and the feeding machine (4) is driven to rotate by the rotating device (14) to enable lump materials (15) in the rotary cylinder feeding machine (4) to tumble, roll and move forwards to feed the main channel (1).
5. The method of claim 1, wherein the method comprises the following steps of: the heating and preheating device (2) mainly has two briquette heating and preheating feeding modes: a vibration feeding type heating preheating feeder (3) with an inclination angle and a rotating cylinder type heating preheating feeder (4) with an inclination angle; take inclination vibration feed formula heating to preheat batcher (3), batcher (3) can design into the sieve form that shakes, be convenient for hot flue gas heating to preheat material (15) on the sieve bottom plate that shakes, make in batcher (3) lump material (15) vibration antedisplacement by batcher vibrator (13) vibration, feed to main ditch (1), take inclination to rotate cylinder formula heating to preheat batcher (4), it can design into the trommel formula to rotate the drum, be convenient for hot flue gas heating to preheat interior lump material (15) of drum trommel, batcher (4) are rotated by rotating device (14) drive and are made to rotate cylinder batcher (4) interior lump material (15) and tumble and roll forward movement, feed to main ditch (1).
6. The method of claim 1, wherein the method comprises the following steps of: the heating preheating device (2) moves backwards or is lifted by the lifting mechanism (12) through the trolley driving mechanism (11), and the normal taphole plugging opening operation of the stokehole mud gun and the tapping machine is not influenced. When the molten iron is completely discharged from the iron notch and the smoke dust is greatly sprayed, the zinc-containing smoke pipeline valve (16) is closed to prevent a large amount of smoke dust at the iron notch from entering the zinc-containing smoke dust hood (9) and being sucked into the zinc-containing smoke pipeline (10), similarly, when the iron notch is discharged, the zinc-containing smoke pipeline valve (16) is in a closed state, and the smoke dust which is greatly sprayed from the iron notch is also completely collected from the front end dust hood (7) and is sucked into the total smoke pipeline (8) and enters a front dust remover of the furnace.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111719027A (en) * | 2020-05-14 | 2020-09-29 | 成渝钒钛科技有限公司 | Method for recovering high-grade heat energy of blast furnace slag |
| CN111876533A (en) * | 2020-08-13 | 2020-11-03 | 广东韶钢松山股份有限公司 | Blast furnace main channel smelting method and device |
| CN112725556A (en) * | 2021-01-19 | 2021-04-30 | 付光明 | Method and device for heating pulverized coal by using blast furnace molten iron dedusting circulating hot flue gas |
| CN113061718A (en) * | 2021-03-24 | 2021-07-02 | 新兴铸管股份有限公司 | Method for treating iron-containing dust in iron and steel plant |
| CN115595393A (en) * | 2022-10-08 | 2023-01-13 | 阳春新钢铁有限责任公司（Cn） | Device and method for melting iron-containing materials in main iron runner of blast furnace |
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2019
- 2019-09-19 CN CN201910931080.5A patent/CN110607407A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111719027A (en) * | 2020-05-14 | 2020-09-29 | 成渝钒钛科技有限公司 | Method for recovering high-grade heat energy of blast furnace slag |
| CN111876533A (en) * | 2020-08-13 | 2020-11-03 | 广东韶钢松山股份有限公司 | Blast furnace main channel smelting method and device |
| CN111876533B (en) * | 2020-08-13 | 2022-02-01 | 广东韶钢松山股份有限公司 | Blast furnace main channel smelting method and device |
| CN112725556A (en) * | 2021-01-19 | 2021-04-30 | 付光明 | Method and device for heating pulverized coal by using blast furnace molten iron dedusting circulating hot flue gas |
| CN113061718A (en) * | 2021-03-24 | 2021-07-02 | 新兴铸管股份有限公司 | Method for treating iron-containing dust in iron and steel plant |
| CN115595393A (en) * | 2022-10-08 | 2023-01-13 | 阳春新钢铁有限责任公司（Cn） | Device and method for melting iron-containing materials in main iron runner of blast furnace |
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Application publication date: 20191224 |