CN107119167A - A kind of method of gas base directly reducing iron processes device and quick reduced iron - Google Patents

A kind of method of gas base directly reducing iron processes device and quick reduced iron Download PDF

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Publication number
CN107119167A
CN107119167A CN201710575969.5A CN201710575969A CN107119167A CN 107119167 A CN107119167 A CN 107119167A CN 201710575969 A CN201710575969 A CN 201710575969A CN 107119167 A CN107119167 A CN 107119167A
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powder
iron
reduction
gas
kiln
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唐竹胜
唐佳
王皓阳
陈惠忠
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B13/00—Making spongy iron or liquid steel, by direct processes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/06—Deoxidising, e.g. killing
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/064—Dephosphorising; Desulfurising
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/04—Removing impurities by adding a treating agent
    • C21C7/068—Decarburising

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention belongs to metallurgical and field of metallurgical equipment, it is related to a kind of method of gas base directly reducing iron processes device and quick reduced iron.Apparatus of the present invention use H for the powdery Iron Ore Powder of 140 325 mesh2, water-gas, the reducibility gas such as coke-stove gas as reducing agent, carry out drastic reduction deoxidation, decarburization, desulfurization, realize gas-based reduction iron.The present invention can be used for the processing such as deoxidation, decarburization, the desulfurization of metal powder material such as copper powder, cobalt powder, nickel powder, tungsten powder, molybdenum powder.The present apparatus and method are except the drastic reduction of common Iron Ore Powder, ultrapure iron concentrate powder or iron scale can also be reduced directly out to the secondary reduction iron powder of powder used in metallurgy, without carrying out secondary reduction again, but also by the hot powder metallurgy powder direct hot charging hot sending after reduction to hydraulic press mould, hot pressing extends various component of machine products.The present apparatus also is adapted for coal base method direct-reduction DRI products.

Description

A kind of method of gas base directly reducing iron processes device and quick reduced iron
Technical field
The invention belongs to metallurgical and field of metallurgical equipment, more particularly to a kind of gas base directly reducing iron processes device and it is quick also The method of former iron.
Background technology
DRI is divided into the gentle base method of coal base method in the world.As the term suggests coal base method is to use coal, coke, semi-coke very To be the raw material containing fixed carbon such as biomass be reducing medium (reducing agent), the product such as DRI restored at high temperature；Gas base Method is with CO, H2The products such as DRI are restored at high temperature for reducing medium (reducing agent).
Gas base method reduced iron equipment and technology, using Midrex methods, the methods of HYL III, FIOR methods as representative, occupy state in the world More than the 80% of border market, it is mainly with the H of natural gas pyrolysis2For reducing medium, ton iron consumes natural gas in 400~600m3, , still there is very big application potential in the area enriched in natural gas resource；
China is the country of a rich coal resources, and natural gas is importer, and natural gas resource is poor, therefore, China It is adapted to development coal based ferrum redactum, equipment and method still no more preferable approach, not to mention gas-based reduction at present of coal based ferrum redactum Iron apparatus and method, can make a breakthrough sexual development, and many people turn gas gas-based reduction iron in Study on Coal now, but all do not succeed also Achievement.
The product of powder metallurgy pressing, obtains being widely recognized as the industry such as locomotive, China's sintered metal product in automobile, rub Its application amount of the fields such as motorcycle is more and more vast, 5%~8% application amount has been reached, using with environmental protection and energy saving；But powder The technique of metallurgical product is traditional, fall behind, and is once reduced and guipure oven process secondary reduction, raw material using coal base tunnel cave pot type method Source is few, and expensive, the sintered metal product price of compacting is higher, typically in 8000~20000 yuan/ton, powder metallurgy system Product are typically only used for 1~below 2kg of piece weight part, there is no method to produce tens kilograms, even 1 ton heavy relatively large portions Part, also improves yield without good method and reduces cost.
The iron powder once reduced in reduced iron powder especially powder metallurgy, is commonly called as a wheat-middlings, and oxygen content is higher, and percent reduction is not It is highly desirable, carbon content is higher, particle hardening is not suitable for being directly used in high-end product compacting；The reduction of so-called hydrogen reducing Iron powder is to have carried out secondary deep reduction deoxidation, is commonly called as two wheat-middlings, percent reduction is higher, sulfur content is low, product plasticity is good, it is easy to Compacting, is adapted to high-end sintered metal product compacting, but traditional secondary reduction stove uses crawler furnace, changes by technology Enter, now the extensive meshbeltfurnace using Muffle shape, be to be passed through H into meshbeltfurnace2, equipment and technology are without very big Improve, the effect of secondary deep reduction deoxidation is satisfied, but decarburization and other effects is unsatisfactory, and single line line capacity Small, H2Consumption is big, Elema electrical heating causes the multinomial defect such as energy consumption height.
Nearly ten years, Chinese manufacturing remains good development momentum, and with comparing firm foundations and anti- Impact capacity.With the rapid development of science and technology with the change of manufacturing environment, especially using computer and information technology as generation The extensive use of the high-tech of table, numerous means are provided for contemporary manufacturing revolution, make manufacturing production skill Great change occurs for art, the mode of production, production scale, and high-tech is with advanced manufacture skill formed by traditional manufacturing technology is combined Art also result in the great attention of various countries, and it is machinery industry big producer to cause China, the substantial amounts of component of machine of demand, certainly It is also cast iron, cast steel blank demand big country, existing spray uses furnace cupola, cupola furnace, blast furnace or induction furnace pair Molten point of the heating such as the pig iron, steel scrap, then cast, not only need to consume coke, and energy consumption is higher, and cause environmental pollution. Therefore, the Small Foundry below 10,000 tons of year scale is banned in state plan.Therefore, also gradually there is steel scrap and overstock in Foundry Market, The problems such as casting is hard to buy.Therefore, find a kind of extensive raw material sources, resource continuous development, energy-conserving and environment-protective, recycling economy newly Casting or the method for steel-making are imperative！
The successful exploitation of further expansion and southeastern coast " combustible ice " of the China with the Belt and Road state basic policy, Chinese day Right gas resource is also more and more, and country encourages enterprise to be widely applied natural gas resource；Meanwhile, CHINESE COAL turns gas and natural gas checking Solve H2Technology it is also increasingly mature, development gas-based reduction iron opportunity arrived.
Based on above-mentioned situation and background, development structure is simple, run safe and stable reliable, workable, production capacity compared with Greatly, energy-saving and emission-reduction, economic and environment-friendly gas-based reduction iron equipment and technology, are adapted to the current national conditions of China, development is adapted to me The advanced device of gas-based reduction iron and technology and new component of machine article fabrication methods of state, it is imperative！
The content of the invention
It is of the invention to be gone back for the deficiency that above-mentioned prior art is present there is provided a kind of gas base directly reducing iron processes device and quickly The method of former iron, apparatus structure is simple, and stable and safe in operation realizes that low temperature depth is quickly reduced.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of gas base directly reducing iron processes device, including it is outer Muffle cylinder, it is placed in furnace tube, drive device, thermostatical storehouse, high temperature meter and hydraulic pressure in the mesh-like of outer muffle inner barrel Machine；The drive device includes kiln tail drive device, two layers of sleeve drive device and kiln hood drive device；
Inner cylinder reduction room is formed in the mesh-like in furnace tube；The outer muffle cylinder includes charging successively from front to back Section, bringing-up section and cooling section；
The feeding section front end is mutually connected with the loading hopper, and the feeding section front end is provided with kiln hood, the kiln hood Top is externally provided with kiln tail backing ring provided with reduction offgas outlet, the feeding section, and the kiln tail drive device passes through kiln tail backing ring band Dynamic feeding section rotation；
The bringing-up section is followed successively by front end heating furnace and heating tail end stove from front to back；Before being provided with before the front end heating furnace Hold and end seal circle is provided with after sealing ring, the heating tail end stove；The front end heating furnace and heating tail end stove are externally provided with heating Stove insulation quilt；The front end heating furnace front end is provided with exhanst gas outlet；Two are provided between the front end heating furnace and heating tail end stove Layer sleeve arrangement；
The cooling section is externally provided with kiln hood backing ring, and the kiln hood drive device drives cooling section to rotate by kiln hood backing ring； The cooling section rear end is provided with kiln head cover, and described kiln head cover one end is communicated to thermostatical storehouse, thermostatical storehouse by reduced iron exit seal The other end is communicated to hydraulic press mould by high temperature meter；
Triple channel spray gun assembly is provided with the kiln head cover center, the triple channel spray gun assembly is communicated to the inner cylinder also Former room；The triple channel spray gun assembly is water vapor channel, gas passage and hydrogen paths from the inside to the outside.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, two layers of described sleeve arrangement are externally provided with two layers of sleeve outer backing ring, and two layers of sleeve drive device is led to Cross two layers of sleeve outer backing ring and drive two layers of sleeve arrangement rotation；
Two layers of described sleeve arrangement include outer cylinder body, the outer cylinder body by support driving mechanism be arranged on it is described it is outer every Outside flame cylinder, formed between the outer cylinder body and outer muffle cylinder on the outside of high temperature flue, the outer cylinder body provided with two layers of set Cylinder external thermal insulation；
Described support driving mechanism includes rotation shifting block I and rotation shifting block II, the rotation shifting block I are distributed on described outer Cylinder inner surface formation " external gear ", the rotation shifting block II is distributed on the outer muffle barrel outer surface formation " internal gear ", External gear and the internal gear intermeshing.
Beneficial effect using above-mentioned further scheme is that two layers of sleeve arrangement are set between every two sections of heating furnaces, During high temperature operation, the cylinder of device is expanded, and rotation shifting block I and rotation shifting block II are intermeshed, and two layers of sleeve arrangement are driving Done under dynamic device effect together with outer muffle cylinder with week, synchronized operating；During cooling, outer muffle cylinder is shunk, outer muffle Cylinder does contraction sliding and running in outer cylinder body, until playback, stops the rotation.So, it is ensured that the high temperature in every section of heating furnace Flue gas is smoothly discharged through high temperature flue, it is ensured that the temperature stability of reduced material, makes material reduction more thorough.Pass through Two layers of sleeve heat-insulation layer are designed, heat-energy losses are further reduced, it is ensured that outer muffle cylinder runs safe, steady at high operating temperatures It is fixed, reliable；
The high-temperature flue gas of heating tail end stove enters front end by the high temperature flue of outer cylinder body and the formation of outer muffle cylinder Heating furnace, makes the high-temperature region of overall kiln, although have support between multiple heating furnaces, but temperature curve in straight line rather than " wavy " curve, is conducive to reduction deoxidation, decarburization, desulfurization of material etc. to handle.
Further, be provided with mesh-like dividing plate in the outer muffle cylinder and mesh-like between furnace tube, outer muffle cylinder and 6-12 many lattice supplies rooms are formed in mesh-like between furnace tube；The eyelet aperture of the mesh-like dividing plate is ￠ 3- ￠ 8mm.
Beneficial effect using above-mentioned further scheme is that reduced material is divided into many lattice of 6-12 bars by mesh-like dividing plate Supplies room, when the supplies room of bottom rotates to top, because furnace tube in mesh-like and mesh-like dividing plate are in mesh-like, Reduced material is acted on by own wt, can one after another be fallen by sieve screen apertures, indoor in " curtain of rain " shape whereabouts in inner cylinder reduction State；Reduced material is fully contacted with reducing gas, carries out reduction reaction, until drastic reduction, reduced material is such Move in circles, go round and begin again and whereabouts and react, by being preheating to reduction, then to drastic reduction.
Further, the axis of the outer muffle cylinder and horizontal line angle are 0.5 ° -3.5 °, and the feeding section is higher than cooling Section；Rotating speed is 0.5-5.0r/min.
It is to be obliquely installed using the beneficial effect of above-mentioned further scheme, the semi-molten shape in outer muffle cylinder can be made State reduction iron product slowly flows down by self gravitation, and the coal gas and flue gas produced in reduction process floats, from reduction offgas outlet Discharge and collect with exhanst gas outlet, realize that preheating is recycled.
Further, flexibly supported between the kiln tail backing ring, kiln hood backing ring and outer muffle cylinder provided with backing ring；Before being set forth in End heating furnace and heating tail end stove both sides are equipped with some burners.
Second object of the present invention is that providing one kind utilizes the above-mentioned quick reduced iron of gas base directly reducing iron processes device Method, it is characterised in that method is as follows：
Using the Iron Ore Powder of TFe >=66%, fineness is polishing to for 140-325 mesh, and adding inner cylinder by loading hopper reduces room, 3-5h is reduced under 850-1000 DEG C of reduction temperature；In reduction process, reduced by triple channel spray gun assembly to inner cylinder indoor Gas is passed through, control pressure is 1000-3000Pa, reduces obtained reduced iron powder hot-loading and hot-conveying and add in hydraulic press mould, pressure Prolong into component of machine product.
Further, described gas is that one or both of vapor, coal gas or hydrogen are mixed above.
The beneficial effects of the invention are as follows：
1st, apparatus of the present invention are adapted to carry out drastic reduction deoxidation, decarburization, desulfurization etc. for the powdery miberal powder of 140~325 mesh Processing, using H2, coal gas, water-gas, the reducibility gas such as coke-stove gas as reducing agent, realize gas-based reduction.
2nd, apparatus of the present invention can add vapor and H2, flame-insulating type heated at reduced iron powder deoxidation, decarburization, desulfurization Reason, can replace the meshbeltfurnace of powder metallurgy secondary reduction completely；It can also be used for the gold such as copper powder, cobalt powder, nickel powder, tungsten powder, molybdenum powder Belong to the processing such as decarburization, deoxidation, desulfurization of dusty material.
3rd, the present invention can solve long kiln using backing ring support, friction-driven and rotation shifting block I and rotation shifting block II Integral-rotation, thoroughly solves the problem of flame-insulating type external heating rotary kiln can not do long, furthermore, it is possible to set multiple tracks support and heat Stove, does not change the structure that temperature curve is straight line yet, and the special structure of the present invention can make kiln be worked into 120-160m It is long or even longer, while also thoroughly solving overall kiln longitudinal dilatation and the big problem being radially expanded.
4th, operationally, reduced material is divided into many lattice supplies rooms of 6-12 bars to apparatus of the present invention by mesh-like dividing plate, Reduced material is fallen one after another by the weight of itself in " curtain of rain " shape, is moved in circles, is gone round and begun again, with reducing gas fully, Thoroughly contact that there is provided reaction speed.
5th, apparatus of the present invention heating thermal source wide material sources, can using high-temperature flue gas, electric energy, coal gas (including natural gas, Coal gas, coke-stove gas, gas generator coal gas etc.), coal powder injection, microwave heating etc. various modes heated.
6th, apparatus of the present invention can make material in stove heat exchange thoroughly, material absorb heat fully, therefore, exhanst gas outlet Flue-gas temperature it is relatively low, typically at 220-280 DEG C, energy-saving and emission-reduction are realized to greatest extent.
7th, the present apparatus and method, can also be by ultrapure iron concentrate powder or iron oxide except the common Iron Ore Powder of drastic reduction Skin is reduced directly out the secondary reduction iron powder of powder used in metallurgy, without carrying out secondary reduction again, by the hot powder after reduction Metallurgical powder direct hot charging hot sending is arrived in hydraulic press mould, and hot pressing extends various component of machine products.
8th, apparatus of the present invention can be widely used in：
1) drying materials
Agricultural, the drying field of planting industry：It is adapted to the drying such as various grains, peanut, tobacco, capsicum, stalk；
The drying field of aquaculture：Feed, excrement etc. are dried；
2) gasification and pyrolysis such as rubbish, stalk production carbon-based fertile byproduct of clean energy resource coproduction；
3) it is used for the carbonaceous material production high PG such as semi-coke, gas generator, shale pyrolysis gasification；
4) the gas-based reduction iron of powdery iron ore or pellet；
5) powder metallurgy reduced iron powder；
6) metal powder material such as iron powder, copper powder, cobalt powder, nickel powder, tungsten powder, molybdenum powder replacement meshbeltfurnace, progress depth decarburization, Deoxidation and desulfurization.
9th, reaction principle of the invention：
1) deoxidation is reduced：Hot reducing medium hydrogen or coke-stove gas are squeezed into stove as reducing agent；Hydrogen Main Ingredients and Appearance For H2, coke-stove gas Main Ingredients and Appearance is H2And CO, at 850-1000 DEG C, occur fierce reduction reaction；
Fe3O4+4H2=3Fe+4H2O Fe3O4+ 4CO=3Fe+4CO2↑
The process that iron oxide is reduced into metallic iron is finally completed, its percent reduction η Fe is up to 99%；
2) decarburization
The reducing medium of the present invention is preferred to use H2；If using coke-stove gas, because its CO content is more, although can Complete iron oxide reduction, but it is higher to be likely to result in the C content in reduced iron powder, predominantly free carbon form is present, greatly containing about Amount is in 0.5-1.0%, so as to cause to also need to carbonization treatment；
The method of the present invention is that fractional saturation steam is squeezed into water vapor channel, and pressure is in 800-1000Pa, due to water H is begun to decompose at 800 DEG C2And O2, its reaction equation is：
C+H2O=CO+H2↑
Vapor, again can be with part metals iron reaction generation Fe after reaction is superfluous2O3·nH2O, and Fe2O3Formed again The catalyst of water-gas (carbon reacts with water), while again can be by CO and H2Be then reduced into Fe, finally make C in reduced iron powder≤ 0.02%；
3) desulfurization
H2Also there is desulfurizing function in high temperature, finally make S≤0.015% of reduced iron powder；
Its reaction equation is：FeS+H2=Fe+H2S↑
10th, the present apparatus also is adapted for coal base method direct-reduction DRI products.
Brief description of the drawings
Fig. 1 is longitudinal profile schematic diagram of the invention；
Fig. 2 is Fig. 1 A-A directions sectional schematic diagram；
Fig. 3 is Fig. 1 B-B directions sectional schematic diagram；
Fig. 4 is Fig. 1 C-C directions sectional schematic diagram；
Fig. 5 is Fig. 1 D-D directions sectional schematic diagram；
Fig. 6 is the mplifying structure schematic diagram at A in Fig. 4；
In figure, 1, hydraulic press；2nd, loading hopper；3rd, kiln hood；4th, two layers of sleeve arrangement；5th, exhanst gas outlet；6th, thermostatical storehouse；7、 Reduce offgas outlet；8th, kiln tail backing ring；9th, forward end seal circle；10th, heating furnace insulation quilt；11st, front end heating furnace；12nd, mesh-like Interior furnace tube；13rd, outer muffle cylinder；14th, mesh-like dividing plate；15th, two layers of sleeve outer backing ring；16th, two layers of sleeve drive device； 17th, outer cylinder body；18th, feeding section；19th, bringing-up section；20th, cooling section；21st, burner；22nd, two layers of sleeve external thermal insulation；23rd, kiln tail is driven Dynamic device；24th, heating tail end stove；25th, end seal circle；26th, kiln hood backing ring；27th, kiln head cover；28th, triple channel spray gun assembly； 29th, reduced iron is exported；30th, kiln hood drive device；31st, water vapor channel；32nd, backing ring is flexibly supported；33rd, inner cylinder reduction room；34、 Rotate shifting block I；35th, rotation shifting block II；36th, gas passage；37th, hydrogen paths；38th, high temperature meter；39th, many lattice supplies rooms.
Embodiment
The principle and feature of the present invention are described below in conjunction with accompanying drawing, the given examples are served only to explain the present invention, and It is non-to be used to limit the scope of the present invention.
A kind of gas base directly reducing iron processes device, including outer muffle cylinder 13, the mesh-like for being placed in outer muffle inner barrel Interior furnace tube 12, drive device, thermostatical storehouse 6, high temperature meter 38 and hydraulic press 1；The drive device includes kiln tail and drives dress Put 23, two layers of sleeve drive device 16 and kiln hood drive device 30；
Inner cylinder reduction room 33 is formed in the mesh-like in furnace tube；The outer muffle cylinder includes adding from front to back successively Expect section 18, bringing-up section 19 and cooling section 20；
The feeding section front end is mutually connected with the loading hopper 2, and the feeding section front end is provided with kiln hood 3, the kiln tail Top is covered provided with reduction offgas outlet 7, and the feeding section is externally provided with kiln tail backing ring 8, and the kiln tail drive device passes through kiln tail support Circle drives feeding section rotation；
The bringing-up section is followed successively by front end heating furnace 11 and heating tail end stove 24 from front to back；Set before the front end heating furnace Have and end seal circle 25 is provided with after forward end seal circle 9, the heating tail end stove；Front end heating furnace and heating tail end the stove peripheral hardware There is heating furnace insulation quilt 10；The front end heating furnace front end is provided with exhanst gas outlet 5；The front end heating furnace and heating tail end stove it Between provided with two layers of sleeve arrangement 4；
The cooling section is externally provided with kiln hood backing ring 26, and the kiln hood drive device drives cooling section to revolve by kiln hood backing ring Turn；The cooling section rear end is provided with kiln head cover 27, and described kiln head cover one end is communicated to thermostatical storehouse by the sealing of reduced iron outlet 29, The thermostatical storehouse other end is communicated to hydraulic press mould by high temperature meter；
Triple channel spray gun assembly 28 is provided with the kiln head cover center, the triple channel spray gun assembly is communicated to the inner cylinder Reduce room；The triple channel spray gun assembly is water vapor channel 31, gas passage 36 and hydrogen paths 37 from the inside to the outside.
Further, two layers of described sleeve arrangement are externally provided with two layers of sleeve outer backing ring 15, two layers of sleeve drive device Two layers of sleeve arrangement are driven to rotate by two layers of sleeve outer backing ring；
Two layers of described sleeve arrangement include outer cylinder body 17, and the outer cylinder body is arranged on described outer by support driving mechanism Outside muffle cylinder, formed between the outer cylinder body and outer muffle cylinder on the outside of high temperature flue, the outer cylinder body and be provided with two layers Sleeve external thermal insulation 22；
Described support driving mechanism includes rotation shifting block I 34 and rotation shifting block II 35, and the rotation shifting block I is distributed on The outer cylinder body inner surface formation " external gear ", it is " interior that the rotation shifting block II is distributed on the outer muffle barrel outer surface formation Gear ", external gear and the internal gear intermeshing.
Further, mesh-like dividing plate 14, outer muffle cylinder are provided with the outer muffle cylinder and mesh-like between furnace tube And 6-12 many lattice supplies rooms 39 are formed in mesh-like between furnace tube；The eyelet aperture of the mesh-like dividing plate is ￠ 3- ￠ 8mm。
Further, the axis of the outer muffle cylinder and horizontal line angle are 0.5 ° -3.5 °, and the feeding section is higher than cooling Section；Rotating speed is 0.5-5.0r/min.
Further, provided with backing ring resilient support 32 between the kiln tail backing ring, kiln hood backing ring and outer muffle cylinder；It is set forth in Front end heating furnace and heating tail end stove both sides are equipped with some burners 21.
Embodiment 1 (secondary reduction iron powder)
Using the iron scale of TFe73.2% straight carbon steel, polishing fineness to 200 mesh percent of pass 100%；Use the present invention Gas base directly reducing iron processes device, add in diameter ￠ 159mm × 1500mm flame-insulating type revolution reduction kiln, using silicon-carbon Rod muffle is heated, and in kiln head cover central spot, H is passed through using the hydrogen paths of triple channel spray gun assembly2, pressure is 1200Pa, After 870 DEG C of reduction temperature, drastic reduction 5h, stop heating, H2Pressure, which is reduced to after 400Pa, to be continued after hydrogen supply gas 8h, temperature of charge 86 DEG C are reached, reduced iron powder is taken out, detects its index, such as table 1.
Table 1
Embodiment 2 (low and middle-end component of machine --- counterweight iron block)
Using TFe69.68% Iron Ore Powder, polishing fineness to 200 mesh percent of pass 100%；Gas base using the present invention is straight Reduced iron subtraction unit is connect, diameter ￠ 159mm × 1500mm flame-insulating type revolution reduction kiln is added, is added using Elema muffle Heat, using the gas passage of triple channel spray gun assembly being passed through water-gas in kiln head cover central spot, (Main Ingredients and Appearance is H2And CO), Pressure is 1350Pa, and 990 DEG C of reduction temperature is reduced after 3.2h, and the water of triple channel spray gun assembly is utilized in kiln head cover central spot Steam channel is passed through a small amount of vapor (saturated vapor) about 0.5h；Stopping is passed through vapor and stops feeding coal gas, utilizes The hydrogen paths of triple channel spray gun assembly continue to be passed through H2, reduce and stop heating after 0.5h, directly add hot reduced iron powder In the mould of 1250t hydraulic presses, counterweight plate thick calendering 28mm after cooling, surveys its density for 7.6t/m3, reach common ash Iron casting 6.9t/m3Upper limit requirement, its leading indicator is shown in Table 2.
Table 2
Embodiment 3 (middle and high end component of machine)
Using TFe71.8% ultrapure iron powder, other indexs reach the requirement of powder metallurgy hyperpure iron extract, and polishing is thin Spend to 200 mesh percent of pass 100%；Using the gas base method DRI device of the present invention, diameter ￠ 159mm × 1500mm is added Flame-insulating type revolution reduction kiln, heated using Elema muffle, in kiln head cover central spot using triple channel spray gun assembly Hydrogen paths are passed through H2, pressure is 1250Pa, and 880 DEG C of reduction temperature is reduced after 3.5h, stops adding, directly by hot reduction Iron powder hot-loading and hot-conveying is added in the mould of 1250t hydraulic presses, then is freely rolled into ￠ 30mm or so round steel bar, after cooling, will It is worked into ￠ 16mm pole sample, surveys its density for 7.81t/m3, after testing its physical index be shown in Table 3.
Table 3
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.

Claims (8)

1. a kind of gas base directly reducing iron processes device, it is characterised in that including outer muffle cylinder, be placed in outer muffle inner barrel Furnace tube, drive device, thermostatical storehouse, high temperature meter and hydraulic press in mesh-like；The drive device includes kiln tail and drives dress Put, two layers of sleeve drive device and kiln hood drive device；
Inner cylinder reduction room is formed in the mesh-like in furnace tube；The outer muffle cylinder from front to back successively include feeding section, Bringing-up section and cooling section；
The feeding section front end is mutually connected with the loading hopper, and the feeding section front end is provided with kiln hood, the kiln hood top Provided with reduction offgas outlet, the feeding section is externally provided with kiln tail backing ring, and the kiln tail drive device is driven by kiln tail backing ring to be added Expect section rotation；
The bringing-up section is followed successively by front end heating furnace and heating tail end stove from front to back；It is close provided with front end before the front end heating furnace End seal circle is provided with after seal, the heating tail end stove；The front end heating furnace and heating tail end stove are externally provided with heating furnace guarantor Warm felt；The front end heating furnace front end is provided with exhanst gas outlet；Provided with two layers of set between the front end heating furnace and heating tail end stove Wound packages is put；
The cooling section is externally provided with kiln hood backing ring, and the kiln hood drive device drives cooling section to rotate by kiln hood backing ring；It is described Cooling section rear end is provided with kiln head cover, and described kiln head cover one end is communicated to thermostatical storehouse by reduced iron exit seal, and thermostatical storehouse is another End is communicated in the mould of hydraulic press by high temperature meter；
Triple channel spray gun assembly is provided with the kiln head cover center, the triple channel spray gun assembly is communicated to the inner cylinder reduction Room；The triple channel spray gun assembly is water vapor channel, gas passage and hydrogen paths from the inside to the outside.
2. device according to claim 1, it is characterised in that two layers of described sleeve arrangement are externally provided with two layers of sleeve outer bracket Circle, two layers of sleeve drive device drives two layers of sleeve arrangement to rotate by two layers of sleeve outer backing ring.
3. device according to claim 1 or 2, it is characterised in that two layers of described sleeve arrangement include outer cylinder body, described Outer cylinder body is arranged on outside the outer muffle cylinder by support driving mechanism, forms high between the outer cylinder body and outer muffle cylinder Provided with two layers of sleeve external thermal insulation on the outside of warm exhaust gases passes, the outer cylinder body；
Described support driving mechanism includes rotation shifting block I and rotation shifting block II, the rotation shifting block I are distributed on the outer cylinder body Inner surface formation " external gear ", the rotation shifting block II is distributed on the outer muffle barrel outer surface formation " internal gear ", described External gear and internal gear intermeshing.
4. device according to claim 1, it is characterised in that set in the outer muffle cylinder and mesh-like between furnace tube Have and form 6-12 many lattice supplies rooms in mesh-like dividing plate, outer muffle cylinder and mesh-like between furnace tube；The mesh-like every The eyelet aperture of plate is ￠ 3- ￠ 8mm.
5. device according to claim 1, it is characterised in that the axis of the outer muffle cylinder is with horizontal line angle 0.5 ° -3.5 °, the feeding section is higher than cooling section；Rotating speed is 0.5-5.0r/min.
6. device according to claim 1, it is characterised in that the kiln tail backing ring, kiln hood backing ring and outer muffle cylinder it Between provided with backing ring resilient support；Be set forth in front end heating furnace and heating tail end stove both sides are equipped with some burners.
7. a kind of method of the quick reduced iron of gas base directly reducing iron processes device described in utilization claim 1, it is characterised in that side Method is as follows：
Using the Iron Ore Powder of TFe >=66%, fineness is polishing to for 140-325 mesh, and adding inner cylinder by loading hopper reduces room, 3-5h is reduced under 850-1000 DEG C of reduction temperature；It is indoor logical to inner cylinder reduction by triple channel spray gun assembly in reduction process Enter gas, control pressure is 1000-3000Pa, reduce obtained reduced iron powder hot charging heat hot sending and add in the mould of hydraulic press, It is rolled into component of machine product.
8. method according to claim 7, it is characterised in that described gas is one in vapor, coal gas or hydrogen Plant or two or more mixing.
CN201710575969.5A 2017-07-14 2017-07-14 A kind of method of gas base directly reducing iron processes device and quick reduced iron Withdrawn CN107119167A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107904398A (en) * 2017-11-23 2018-04-13 唐竹胜 A kind of short route iron-smelting device and its without Jiao without nitre energy conservation and environmental protection short route iron smelting method
CN109136441A (en) * 2018-08-25 2019-01-04 张英华 The production method of the making apparatus and sponge iron and iron powder of sponge iron and iron powder
CN110514021A (en) * 2019-09-04 2019-11-29 营口仁和昌顺耐火材料有限公司 A kind of rotation dynamic sinter system
CN112301178A (en) * 2020-11-10 2021-02-02 烟台市红森林节能环保科技有限公司 Device and method for gas-based reduction of metal oxide fine ore
CN113118452A (en) * 2021-04-15 2021-07-16 湖南省南铂新材料有限公司 High-purity ruthenium production and processing equipment and preparation method thereof
CN114921602A (en) * 2022-06-16 2022-08-19 山东省红森林新材料科技有限公司 Ultrashort flow steelmaking device system
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107904398A (en) * 2017-11-23 2018-04-13 唐竹胜 A kind of short route iron-smelting device and its without Jiao without nitre energy conservation and environmental protection short route iron smelting method
CN109136441A (en) * 2018-08-25 2019-01-04 张英华 The production method of the making apparatus and sponge iron and iron powder of sponge iron and iron powder
CN109136441B (en) * 2018-08-25 2021-01-08 张英华 Method for preparing sponge iron and iron powder
CN110514021A (en) * 2019-09-04 2019-11-29 营口仁和昌顺耐火材料有限公司 A kind of rotation dynamic sinter system
CN112301178A (en) * 2020-11-10 2021-02-02 烟台市红森林节能环保科技有限公司 Device and method for gas-based reduction of metal oxide fine ore
CN113118452A (en) * 2021-04-15 2021-07-16 湖南省南铂新材料有限公司 High-purity ruthenium production and processing equipment and preparation method thereof
CN113118452B (en) * 2021-04-15 2022-02-18 湖南省南铂新材料有限公司 High-purity ruthenium production and processing equipment and preparation method thereof
CN114921602A (en) * 2022-06-16 2022-08-19 山东省红森林新材料科技有限公司 Ultrashort flow steelmaking device system
CN114990274A (en) * 2022-06-16 2022-09-02 山东省红森林新材料科技有限公司 Powdery DRI device system for reducing powdery iron ore through gas-based/hydrogen-based suspension
CN114990274B (en) * 2022-06-16 2023-09-26 山东省红森林新材料科技有限公司 Powdered iron ore gas base/hydrogen base suspension reduction powder DRI device system
CN114921602B (en) * 2022-06-16 2023-10-10 山东省红森林新材料科技有限公司 Ultrashort flow steelmaking device system

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