CN108795460A - Iron coke couples smalls pyrolytic process and system - Google Patents
Iron coke couples smalls pyrolytic process and system Download PDFInfo
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- CN108795460A CN108795460A CN201810805709.7A CN201810805709A CN108795460A CN 108795460 A CN108795460 A CN 108795460A CN 201810805709 A CN201810805709 A CN 201810805709A CN 108795460 A CN108795460 A CN 108795460A
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- pyrolysis
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- coke
- coal
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 136
- 239000000571 coke Substances 0.000 title claims abstract description 83
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000008569 process Effects 0.000 title claims abstract description 18
- 238000000197 pyrolysis Methods 0.000 claims abstract description 70
- 239000003245 coal Substances 0.000 claims abstract description 61
- 239000007789 gas Substances 0.000 claims abstract description 61
- 238000004939 coking Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000003763 carbonization Methods 0.000 claims abstract description 11
- 230000008878 coupling Effects 0.000 claims abstract description 9
- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims description 39
- 238000001035 drying Methods 0.000 claims description 30
- 238000009434 installation Methods 0.000 claims description 26
- 239000011230 binding agent Substances 0.000 claims description 25
- 241000196324 Embryophyta Species 0.000 claims description 22
- 239000008187 granular material Substances 0.000 claims description 18
- 239000002912 waste gas Substances 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 15
- 238000012216 screening Methods 0.000 claims description 13
- 238000004064 recycling Methods 0.000 claims description 12
- 239000002245 particle Substances 0.000 claims description 11
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims description 10
- 244000046052 Phaseolus vulgaris Species 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 238000000465 moulding Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 5
- 230000004048 modification Effects 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 3
- 238000007885 magnetic separation Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 229940095686 granule product Drugs 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 abstract description 9
- 239000003034 coal gas Substances 0.000 abstract description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000000446 fuel Substances 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 abstract description 2
- 239000002918 waste heat Substances 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 9
- 239000007767 bonding agent Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000003610 charcoal Substances 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000005272 metallurgy Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- -1 130 Substances 0.000 description 1
- 206010013786 Dry skin Diseases 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 210000000952 spleen Anatomy 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 235000020985 whole grains Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/08—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps and the like
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Coke Industry (AREA)
Abstract
A kind of iron coke coupling smalls pyrolytic process of present invention offer and system realize that the coupling of pyrolysis of coal technology and sections coking coal carbonization technology, making iron coke product realize the optimization into stokehold material, enhance the lumpiness and intensity of material；Generated coal gas when being carbonized and be pyrolyzed using iron coke, as carbide furnace main fuel and protectiveness reduction is carried out to the Iron Ore Powder in iron coke；The waste heat of material and gas is utilized, reaches coal classification and is uniformly pyrolyzed, improves pyrolysis gas yield and the tar rate of recovery；Warm metallurgical reduction and coal classification, sub-prime utilize, and provide energy utilization rate；It solves mass energy consumption problem when single coking, iron oxide reduction, has saved mass energy, production overall cost reduces.
Description
Technical field
The present invention relates to coal chemical industries and reduction of iron ore fines technical field, and in particular to a kind of iron coke coupling smalls pyrolytic process
And system.
Background technology
Coal fast pyrogenation refers to that coal dust is put into the rapid pyrolysis apparatus of certain temperature, passes through high temperature in a short period of time
It is pyrolyzed, organic composition becomes gas in coal dust or coal tar, fixed carbon become the process of semicoke.Coal fast pyrogenation will produce
A large amount of powdered semicokes, the more difficult directly burning of powdered semicoke utilizes, and more difficult molding, and addition binder is needed to be made into
It is recycled after formed coke.
A kind of formed coke preparation sides of the CN101984027A the invention discloses coke-powder formed coke binder and based on the binder
Coke powder crushing and processing after pyrolysis are less than the coke powder of 3mm by method at granularity, and 1 part of coke-powder formed coke is added in every 9 parts of coke powders
Binder is stirred 10~15 minutes and is discharged, places 15~20 minutes at room temperature, is put into molding machine extrusion forming, is pressed into cylinder
Shape, after being placed at room temperature for 2~8 hours, in 120 DEG C of dryings.
CN103436312A is the invention discloses a kind of composite industrial gasified burnt binder and its prepares the side of formed coke
Coke breeze after pyrolysis is crushed by method, itself and binder are placed in kneading pot, are uniformly mixed；Mixture is sent to Kun and is pressed
It in machine, is press-formed under room temperature, up to the formed coke after drying, cooling.
CN105950242A the present invention provides for the molding compound binding agent of formed coke, include the type of the compound binding agent
Coke and preparation method thereof, formed coke intensity is good made of the compound binding agent and the semicoke of Rapid-pyrolysis generation, conveniently deposits
Storage, transport and use.The method provided by the invention for preparing the formed coke is also very easy, is easy industrial application.
In above-mentioned technical proposal, bonding agent be all pyrolysis formed half it is defocused be mixed with die mould, the enhancing of formed coke is imitated
Fruit is limited, and therefore, raw material is required for high-grade iron ore deposit used by forming semicoke, is unable to fully utilize low-grade oxidation
Object mine.
In addition, being all the heat that generates in pyrolytic process using blast furnace exiting flue gas as the heat source of pyrolysis in the prior art
It vents one's spleen by flue gas dilution, the heat vale of mixture of generation is low, and active principle content is low, and use value is low.
Invention content
The present invention provides a kind of iron coke coupling smalls pyrolytic process, realizes pyrolysis of coal technology and sections coking coal carbonization technology
Coupling makes iron coke product.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A kind of iron coke coupling smalls pyrolytic process, includes the following steps：
A, accounting 35%-45% raw materials iron powder, 54%-64% coking coal are mixed after being crushed with 1%-3% binders, is sent into high-pressure molding and sets
It is standby to be molded；
B, sections coking coal after molding is dried by drying unit；
C, drying rear profile iron coke coal, which enters in carbide furnace, is carbonized；
D, the high temperature modification iron coke after carbonization enters heat carrier as first via raw material and combines pyrolysis installation；Smalls and small beans difference
Behind smalls storehouse and the processing of granule pyrolysis of coal filter device, enter heat carrier joint pyrolysis as the second tunnel, third road raw material
Device；
E, the material after the pyrolysis of heat carrier joint pyrolysis installation enters cooling device cooling；
F, product after cooling enters magnetic plant magnetic separation, exports iron coke finished product and semicoke product；
G, semicoke product enters screening plant, exports half breeze and semicoke granule product.
Preferably, in step b, high-temp waste gas and cooling device that the heat source of the drying unit is generated by carbide furnace generate
Hot waste gas composition, the exhaust gas that drying unit generates enters deduster and is dusted.
Preferably, the dedusting ash that the deduster generates, which is sent at the raw material mouth of high pressure forming device, to be recycled, dedusting
The exhaust gas part that device generates is discharged into air, and another part enters cooling device and participates in cooling thermal material and equal means of press seals.
Preferably, in step d, the raw coke oven gas that the heat carrier combined heating device pyrolysis generates, by granule pyrolysis of coal
It after filter device dedusting, filtering, cooling, purifies to form circulating gas by condensate recycling device, sends carbide furnace use back to.
Preferably, in step a, the iron powder uses Iron concentrate or Iron Ore Powder.
The present invention also provides a kind of iron cokes to couple smalls pyrolysis system, including：
High pressure forming device, drying unit, carbide furnace, heat carrier joint pyrolysis installation, cooling device, magnetic plant and screening are set
It is standby；
The high pressure forming device is equipped with the first feeding mouth, the second feeding mouth and third feeding mouth, wherein the first feeding mouth and iron
The material outlet of powder is connected, and the second feeding mouth is connected with the material outlet of coking coal, and third feeding mouth is for being added binder, with iron
Powder and coking coal are sufficiently mixed in proportion；
The feeding mouth of the drying unit is connected with the discharge port of high pressure forming device, the first thermal source inlet and carbon of drying unit
The high-temp waste gas mouth for changing stove is connected, and the Secondary Heat Source entrance of drying unit is connected with the outlet of the hot waste gas of cooling device, drying dress
The discharge port set is connected with the feeding mouth of carbide furnace；
First feeding mouth of the heat carrier joint pyrolysis installation is connected with the discharge port of carbide furnace, and heat carrier combines pyrolysis installation
The second feeding mouth be connected with smalls bin discharge port external, heat carrier combines third feeding mouth and the granule pyrolysis of coal device of pyrolysis installation
Discharge port be connected, the discharge port of heat carrier joint pyrolysis installation is connected with the feed inlet of cooling device, gas outlet and small beans
Pyrolysis installation air intake is connected；
The discharge port of the cooling device is connected with the feed inlet of magnetic plant, and the discharge port of the magnetic plant exports iron all the way
Coke, another way are connected with the feed inlet of screening plant；The discharge port of the screening plant exports half breeze and half char particle respectively.
Further, further include condensate recycling device, air intake and the granule pyrolysis of coal filtering of the condensate recycling device fill
The raw coke oven gas outlet set is connected, and the gas outlet of condensate recycling device is connected by gas fan with the gas entry of carbide furnace.
Further, further include deduster, the entrance of the deduster is connected with the gas outlet of drying unit, and deduster removes
Dust discharge port is connected with the feeding mouth of high pressure forming device, and the first gas outlet of deduster is connected with air by a part of exhaust gas
It is discharged into air, the second gas outlet of deduster is connected through waste gas circulation wind turbine with the air inlet of cooling device.
By above technical scheme it is found that the present invention is used raw material（Iron powder, coking coal, dedusting ash）Be aided with binder high pressure at
Sections coke is made in type, by the stove heat carbonization that is carbonized, carbide furnace is heated using the circulating gas that pyrolysis generates, relative to existing skill
Art has the following technical effect that：
1, using iron powder as leaning agent, it is added in gas rich coal, high density type iron coke, carbonization is formed through high pressure forming device
Sections coke is quickly heated to carburizing temperature by stove under not disturbed environment, makes uniform coking coal of the embedding cloth in sections coke one
The gel for determining to be formed at temperature is adequately filled between particle, and binder ensures sections coke in high temperature cabonization environment lower density
It is constant, shape invariance, to be conducive between gel is filled to particle, form fine and close charcoal skeleton, generate have it is certain strong
Degree and lumpiness contain ferrocoke, and when overcoming the independent coking of gas rich coal, coke strenth is poor, the smaller weakness of lumpiness；
2, hydrogen-rich gas, CO gas and the high temperature carbon granule generated in carbonisation using sections coking coal, in pyrocarbon
Gas-solid and solid-solid reduction is carried out to Iron concentrate or Iron Ore Powder during change, that is, generate formed coke as blast furnace coke with
Mineral aggregate enters furnace charge, and has carried out prereduction to iron oxide, so that the iron charge grade into stove is increased, the volume of pan feeding reduces；
3, it realizes that coal wholegrain grade is pyrolyzed using the sensible heat of hot iron coke, smalls is sent into heat carrier joint pyrolysis installation to hot iron coke
Protectiveness cooling is carried out under reducing atmosphere, and destructive distillation is carried out to itself in cooling procedure；Small beans is sent into granule pyrolysis of coal
Cold filtration is carried out to high temperature raw coke oven gas in filter device and heats itself simultaneously；
4, the pyrolysis coal gas that the coal gas and pyrolysis installation generated using iron coke carbonization is generated is realized rich as the main fuel of carbide furnace
The efficient utilization of abundant coal gas.
The present invention realizes the optimization into stokehold material, enhances the lumpiness and intensity of material；Utilize iron coke carbonization and heat
Generated coal gas when solution, as carbide furnace main fuel and in iron coke Iron Ore Powder carry out protectiveness reduction；Object is utilized
The waste heat of material and gas, reaches coal classification and is uniformly pyrolyzed, and improves pyrolysis gas yield and the tar rate of recovery；Warm metallurgy
Reduction and coal classification, sub-prime utilize, and provide energy utilization rate；Solves mass energy when single coking, iron oxide reduction
Consumption problem, has saved mass energy, and production overall cost reduces.
Description of the drawings
Fig. 1 is that iron coke of the present invention couples smalls pyrolytic process flow chart；
Fig. 2 is the structural schematic diagram that iron coke of the present invention couples smalls pyrolysis system.
In figure：
100, high pressure forming device, 110, Iron Ore Powder, dedusting ash, 120, coking coal, 130, binder；
200, drying unit, 201, drying rear profile iron coke coal, 202, exhaust gas；
300, carbide furnace, 301, high temperature modification iron coke, 302, high-temp waste gas；
400, heat carrier combines pyrolysis installation, and 410, smalls, 420, small beans, 430, smalls storehouse, 440, granule pyrolysis of coal filtering
Device, 401, heat type iron coke, hot half breeze, hot half char particle mixture, 402, crude gas pipeline, 441, raw coke oven gas, 442, preheating
Solve small beans；
500, cooling device, 501, sections is burnt, semicoke mixture, 502, hot waste gas；
600, magnetic plant, 610, iron coke finished product, 602, half breeze, half char particle mixture
700, screening plant, 710, half breeze product, 720, half char particle finished product；
800, condensate recycling device, 810, gas fan, 801, coal gas, 811, circulating gas；
900, deduster, 910, waste gas circulation wind turbine, 901 exhaust gas, 902, dedusting ash, 903, extra exhaust gas, 911, cycle gas.
Specific implementation mode
A kind of preferred embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
As shown in Fig. 2, smalls pyrolysis system includes the carbonization of present invention metallurgy reduction coupling formed coke altogether：High pressure forming device
100, drying unit 200, carbide furnace 300, heat carrier joint pyrolysis installation 400, cooling device 500, magnetic plant 600, screening
700, condensate recycling device 800, deduster 900.
The high pressure forming device 100 sets there are three feeding mouth, respectively with Iron Ore Powder 110, coking coal 120, binder 130
Outlet is connected, and the one of entrance of high pressure forming device is connected with the outlet of the dedusting ash of deduster 900.
200 first entrance of the drying unit is connected with 100 discharge port of high pressure forming device, second entrance and carbide furnace
300 high-temp waste gas mouth is connected, and third entrance is connected with the outlet of the hot waste gas of cooling device 500；The outlet one of drying unit 200
Road enters the feeding mouth of carbide furnace 300, and another way outlet is connected with the entrance of deduster 900.
The heat carrier combines 400 entrance of pyrolysis installation, is connected all the way with the discharge port of carbide furnace 300, another way and end
430 discharge port of coal bunker is connected, and third road is connected with the outlet of granule pyrolysis of coal device 440；Discharge port and cooling device 500 into
Material mouth is connected, and gas outlet is connected with the air intake of granule pyrolysis of coal device 440.
The outlet of the magnetic plant 600 all the way output iron coke product 610, be connected all the way with the entrance of screening plant 700；
The outlet of the screening plant 700 exports 720 two kinds of products of half breeze 710 and half char particle.
The air intake of the condensate recycling device 800 is connected with the outlet of the raw coke oven gas of granule pyrolysis of coal filter device 440, cold
The outlet of solidifying retracting device 800 is connected by gas fan 810 with the gas entry of carbide furnace 300.
It is connected at the dedusting ash discharge port and the raw material mouth 210 of high pressure forming device that the deduster 900 generates；Deduster
900 outlets are connected with air all the way is discharged into air by a part of exhaust gas, and another way is through waste gas circulation wind turbine 910 and cooling device
500 air inlet is connected.
1 pair of present invention process illustrates below in conjunction with the accompanying drawings：
A kind of iron coke coupling smalls pyrolytic process, includes the following steps：
Raw material includes Iron Ore Powder 110, coking coal 120, smalls 410 and small beans 420, wherein by accounting 35%-45% raw materials iron powder,
54%-64% coking coal, the dedusting ash 902 returned from deduster 900 are aided with 1%-3% binders 130, and after mixing is broken, mixing is broken
To after 3mm, sections coking coal 101 is made in high pressure forming device 100.
The iron powder is typical but non-limiting content is：35%,36%,37%,38%,39%,40%,41%,42%,43%,44%,
45%。
The coking coal is typical but non-limiting content is：54%,55%,56%,57%,58%,59%,60%,61%,62%,63%,
64%。
The binder is typical but non-limiting content is：1%, 2% or 3%.
Sections char strength performance of the present invention is illustrated with experimental data below：
| Iron powder | Coking coal | Binder | The strong M of formed coke40 | |
| Comparative example 1 | 30% iron powder | 70% coking coal | - | 70 |
| Comparative example 2 | 28% iron powder | 70% coking coal | 2% binder | 58 |
| Embodiment 1 | 35% iron powder | 64% coking coal | 1% binder | 75 |
| Embodiment 2 | 45% iron powder | 54% coking coal | 1% binder | 82 |
| Embodiment 3 | 38% iron powder | 59% coking coal | 3% binder | 76 |
By above-mentioned experimental data it is found that reaching 75 containing bonding agent and with the formed coke intensity of raw material proportioning within the scope of the present invention
M40More than, if raw material proportioning is beyond in the scope of the invention, formed coke intensity obviously glides, if not using bonding agent, formed coke intensity
It is relatively low.Binder of the present invention ensures that sections coke is constant in high temperature cabonization environment lower density, shape invariance, to be conducive to colloid
Body is filled between particle, forms fine and close charcoal skeleton, sections coke is made to have high intensity.
Sections coking coal 101 enters drying unit 200 after being molded.The high-temp waste gas that the heat source of drying unit is generated by carbide furnace
302 and the hot waste gas 502 that generates of cooling device form, the exhaust gas 202 that drying unit generates is dusted into deduster 900.
It dries rear profile iron coke coal 201 and enters the progress high temperature cabonization of carbide furnace 300, the circulating gas generated by pyrolysis installation
811 mixed with air after main burning air source as carbide furnace.
The high temperature modification iron coke 301 that carbide furnace generates enters heat carrier and combines pyrolysis installation 400, by smalls 410, smalls storehouse
430, small beans 420, granule pyrolysis of coal filter device 440 form two-way material to be pyrolyzed, the high temperature sections being sent into carbide furnace
Coke is sufficiently mixed pyrolysis and the bored carbonization of homogeneous heat in heat carrier joint pyrolysis installation, and a large amount of waste coal is generated in pyrolytic process
Gas enters granule pyrolysis of coal filter device by crude gas pipeline 402, and raw coke oven gas is passing through granule pyrolysis of coal filter device process
In, small beans is tentatively pyrolyzed, and filter cooling raw coke oven gas 441.
The mixing thermal material 401 that heat carrier joint pyrolysis installation pyrolysis generates is cooled down into cooling device 500.By removing
The part cycle gas 911 that dirt device 900 introduces enters cooling device and participates in cooling thermal material and equal means of press seals, prevents heat carrier from joining
The part raw coke oven gas for closing pyrolysis installation enters cooling device.
Mixed material 501 after cooling enters magnetic plant 600.Two kinds of products are exported after magnetic separation is classified：Iron coke at
Product 610 and half breeze, half char particle mixture 602.
Half breeze, half char particle mixture 602 carry out classification processing into screening plant 700, export half breeze 710 and semicoke
720 two kinds of products of grain.
Condensate recycling device 800 is entered by the raw coke oven gas 441 of granule pyrolysis of coal filter device output, after carrying out condensing recovery
Output coal gas 801 pressurizes by gas fan 810, output circulating gas 811 to carbide furnace.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
It encloses and is defined, under the premise of not departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made should all be fallen into the protection domain of claims of the present invention determination.
Claims (8)
1. a kind of iron coke couples smalls pyrolytic process, which is characterized in that include the following steps：
A, accounting 35%-45% raw materials iron powder, 54%-64% coking coal are mixed after being crushed with 1%-3% binders, is sent into high-pressure molding and sets
It is standby to be molded；
B, sections coking coal after molding is dried by drying unit；
C, drying rear profile iron coke coal, which enters in carbide furnace, is carbonized；
D, the high temperature modification iron coke after carbonization enters heat carrier as first via raw material and combines pyrolysis installation；Smalls and small beans difference
Behind smalls storehouse and the processing of granule pyrolysis of coal filter device, enter heat carrier joint pyrolysis as the second tunnel, third road raw material
Device；
E, the material after the pyrolysis of heat carrier joint pyrolysis installation enters cooling device cooling；
F, product after cooling enters magnetic plant magnetic separation, exports iron coke finished product and semicoke product；
G, semicoke product enters screening plant, exports half breeze and semicoke granule product.
2. iron coke according to claim 1 couples smalls pyrolytic process, which is characterized in that in step b, the drying unit
The high-temp waste gas that is generated by carbide furnace of heat source and the hot waste gas that generates of cooling device form, the exhaust gas that drying unit generates enters
Deduster is dusted.
3. iron coke according to claim 2 couples smalls pyrolytic process, which is characterized in that the dedusting that the deduster generates
Ash is sent at the raw material mouth of high pressure forming device and is recycled, and the exhaust gas part that deduster generates is discharged into air, another part
Cooling thermal material and equal means of press seals are participated in into cooling device.
4. coupling smalls pyrolytic process according to claim 1-3 any one of them iron cokes, which is characterized in that described in step d
The raw coke oven gas that the pyrolysis of heat carrier combined heating device generates leads to after the dedusting of granule pyrolysis of coal filter device, filtering, cooling
It crosses condensate recycling device to purify to form circulating gas, sends carbide furnace use back to.
5. iron coke according to claim 1 couples smalls pyrolytic process, which is characterized in that in step a, the iron powder uses
Iron concentrate or Iron Ore Powder.
6. a kind of iron coke couples smalls pyrolysis system, which is characterized in that including：
High pressure forming device, drying unit, carbide furnace, heat carrier joint pyrolysis installation, cooling device, magnetic plant and screening are set
It is standby；
The high pressure forming device is equipped with the first feeding mouth, the second feeding mouth and third feeding mouth, wherein the first feeding mouth and iron
The material outlet of powder is connected, and the second feeding mouth is connected with the material outlet of coking coal, and third feeding mouth is for being added binder, with iron
Powder and coking coal are sufficiently mixed in proportion；
The feeding mouth of the drying unit is connected with the discharge port of high pressure forming device, the first thermal source inlet and carbon of drying unit
The high-temp waste gas mouth for changing stove is connected, and the Secondary Heat Source entrance of drying unit is connected with the outlet of the hot waste gas of cooling device, drying dress
The discharge port set is connected with the feeding mouth of carbide furnace；
First feeding mouth of the heat carrier joint pyrolysis installation is connected with the discharge port of carbide furnace, and heat carrier combines pyrolysis installation
The second feeding mouth be connected with smalls bin discharge port external, heat carrier combines third feeding mouth and the granule pyrolysis of coal device of pyrolysis installation
Discharge port be connected, the discharge port of heat carrier joint pyrolysis installation is connected with the feed inlet of cooling device, gas outlet and small beans
Pyrolysis installation air intake is connected；
The discharge port of the cooling device is connected with the feed inlet of magnetic plant, and the discharge port of the magnetic plant exports iron all the way
Coke, another way are connected with the feed inlet of screening plant；The discharge port of the screening plant exports half breeze and half char particle respectively.
7. iron coke couples smalls pyrolysis system according to claim 6, which is characterized in that further include condensate recycling device, it should
The air intake of condensate recycling device is connected with the outlet of the raw coke oven gas of granule pyrolysis of coal filter device, the gas outlet of condensate recycling device
It is connected with the gas entry of carbide furnace by gas fan.
8. iron coke couples smalls pyrolysis system according to claim 6, which is characterized in that further include deduster, the deduster
Entrance be connected with the gas outlet of drying unit, the dedusting ash discharge port of deduster is connected with the feeding mouth of high pressure forming device,
First gas outlet of deduster is connected with air is discharged into air by a part of exhaust gas, and the second gas outlet of deduster is through waste gas circulation
Wind turbine is connected with the air inlet of cooling device.
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