CN205990448U - A kind of pyrolysis of fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system - Google Patents

A kind of pyrolysis of fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system Download PDF

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CN205990448U
CN205990448U CN201621051925.XU CN201621051925U CN205990448U CN 205990448 U CN205990448 U CN 205990448U CN 201621051925 U CN201621051925 U CN 201621051925U CN 205990448 U CN205990448 U CN 205990448U
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China
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pyrolysis
entrance
outlet
lateritic nickel
nickel ore
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宋文臣
王静静
李红科
曹志成
薛逊
吴道洪
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Jiangsu Province Metallurgical Design Institute Co Ltd
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Jiangsu Province Metallurgical Design Institute Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/129Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Abstract

This utility model is related to chemical industry metallurgical field and in particular to a kind of utilization lateritic nickel ore is pyrolyzed the system with reduction reaction.For the deficiencies in the prior art, the utility model proposes a kind of pyrolysis of fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system and method, to realize the pyrolysis of coal during lateritic nickel ore coal-based direct reduction and the reduction melting of lateritic nickel ore produces granulated iron.The direct reduction reactor that semicoke after being pyrolyzed in this system continues to participate in lateritic nickel ore in rotary hearth furnace obtains metallized pellet.This system can realize the pyrolysis of coal in lateritic nickel ore Direct Reduction, so that petroleum resources is reclaimed, increase the side-product of rotary hearth furnace coal-based DR process, the fume afterheat that furnace interior produces effectively is recycled, environmental protection, reduces process energy consumption and cost indirectly.And, described metallized pellet, through recycling twice, makes the lateritic nickel ore response rate increase, hereby it is achieved that the high efficiente callback of lateritic nickel ore.

Description

A kind of fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group Pyrolysis and reduction reaction system
Technical field
This utility model is related to chemical industry metallurgical field.Specifically, this utility model is related to one kind using lateritic nickel ore heat Solution and the system of reduction reaction.
Background technology
In recent years, with the fast development of the exhausted and domestic rustless steel industry of high-grade nickel sulfide ore, low-grade laterite Nickel minerals has become as the primary raw material producing ferro-nickel product.In order to solve the Rational Utilization of lateritic nickel ore, with lateritic nickel ore For raw material, coal dust is reducing agent, using direct-reduction process, the ferrum in Ore and nickel has been reduced into metallic iron and metallic nickel, then warp Superfusion point or mill choosing make nickel be enriched in ferro-nickel product.
Now, coal-based DR process has multiple, and wherein, because rotary hearth furnace reduction technique has, equipment is simple, operation Easily, with short production cycle, response speed is fast, advantages of environment protection, so rotary hearth furnace reduction technique has caused widely Concern.The ultimate principle of rotary hearth iron making is by the flat flame burner burning positioned at furnace sidewall, and the high temperature of flame is passed by radiation Feed layer surface pelletizing, so that the metal-oxide in carbonaceous pelletizing is reduced at high temperature, heating energy source more adopt natural gas, Cracked gas, coke-stove gas, coal gas of converter and coal gas etc., energy sources is quite varied.Using rotary hearth furnace equipment DRI (DRI) technique mainly includes the following steps that:Iron Ore Powder is mixed homogeneously with reducing agent coal dust, is pressed into carbonaceous pelletizing ore deposit, dry; The carbonaceous pelletizing being dried equably is layered on rotary hearth furnace, make reduced zone in rotary hearth furnace for the carbonaceous pelletizing (temperature up to 1300 DEG C~1400 DEG C) in be reduced 15min-30min, you can obtain the metallized pellet that degree of metalization is more than 85%.Turn The advantage that bottom furnace apparatus are used for producing DRI is, reduction temperature is high, the time is short, furnace charge keeps relative transfixion with furnace bottom, Thus avoiding the problems such as rotary kiln, fluid bed bonding, shaft furnace dross.Chinese patent CN 102212636A discloses a kind of red The iron smelting method that point stove melts point is melted in native nickel minerals rotary hearth furnace coal-based direct reduction combustion gas, and lateritic nickel ore is mixed with coal and flux Pelletizing afterwards, dry bulb is distributed in rotary hearth furnace and carries out direct-reduction and obtain metallized pellet, and metallized pellet feeding coal gas makees fuel Regenerative gas melt a point stove and carry out molten point, finally give nickelic dilval.
But, existing rotary hearth furnace processes in lateritic nickel ore technology and yet suffers from some problems.Reduction coal dust is in lateritic nickel ore Reduction mineral and the effect of part supply heat, the oil gas of itself preciousness is only served in rotary hearth furnace Direct Reduction Resource does not obtain more efficiently utilization.Therefore, existing rotary hearth furnace processes lateritic nickel ore technology and is further improved.
Utility model content
Process for existing rotary hearth furnace and do not account in lateritic nickel ore technology reclaiming in reduction coal in Direct Reduction Petroleum resources, the utility model proposes a kind of heat of fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group Solution and reduction reaction system and method, to realize the pyrolysis of coal during lateritic nickel ore coal-based direct reduction and lateritic nickel ore Reduction melting produces granulated iron.Semicoke after being pyrolyzed in this system continues to participate in the direct reduction reactor of lateritic nickel ore in rotary hearth furnace Obtain metallized pellet.This system can achieve the pyrolysis of coal in lateritic nickel ore Direct Reduction, makes the oil gas money of preciousness Source is reclaimed, and increased the side-product of rotary hearth furnace coal-based DR process, and, described rotary hearth furnace furnace interior produces Fume afterheat can effectively be recycled, thus, this system achieves environmental protection, indirectly reduces process energy consumption and cost. And, described metallized pellet recycles so that the response rate of lateritic nickel ore increases through twice, thus, this system Achieve the high efficiente callback of lateritic nickel ore.
For solving above-mentioned technical problem, the technical solution adopted in the utility model is:
This utility model provides a kind of fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group Pyrolysis and reduction reaction system are it is characterised in that include:Dispensing mixing device, shaped device, drying device, have pyrolysis and The rotary hearth furnace of restoring function, device for recovering oil and gas, slightly broken gravity concentration apparatus, mill ore magnetic selection device and fume dust remover, wherein;
Described dispensing mixing device includes:Lateritic nickel ore entrance, reduction coal entrance, additive entrance and mixed material go out Mouthful, for lateritic nickel ore, reduction coal and additive are carried out dispensing mixing treatment, obtain mixed material;
Described shaped device includes:Mixed material entrance and mixing pelletizing outlet, described mixed material entrance is mixed with described Close material outlet to be connected, for described mixed material is carried out forming processes, obtain mixing pelletizing;
Described drying device includes:Mixing pelletizing entrance and the outlet of dry bulb group, described mixing pelletizing entrance is mixed with described Pelletizing outlet is connected, and for described mixing pelletizing is dried process, obtains dry bulb group;
Described have pyrolysis and the rotary hearth furnace of restoring function includes:Adjacent feed zone, pyrolysis zone, reducing zone and go out successively Material area, wherein, described pyrolysis zone is provided with partition wall respectively and described feed zone, described reducing zone between, described reducing zone with described Be provided with barricade between discharge zone, described partition wall and described barricade are all to be extended downwardly by the roof of described rotary hearth furnace, and with described The cloth tray of rotary hearth furnace keeps certain intervals;Wherein, it is provided with multiple heating tubes, for described heat inside the furnace wall of described pyrolysis zone Xie Qu carries out heating tube mode heating;Described reducing zone is provided with multiple burners inside furnace wall, for burning to described reducing zone Mouth mode heats;Described feed zone furnace wall is provided with dry bulb group's entrance and semi-coke entrance, and described pyrolysis zone furnace wall is provided with heating Pipe high-temperature dust removal smoke inlet and pyrolysis oil gas vent, described reducing zone furnace wall is provided with high-temperature flue gas outlet, described discharge zone Furnace wall is provided with metallized pellet outlet, and described dry bulb group entrance is exported with described dry bulb group and is connected;
Described device for recovering oil and gas includes:Pyrolysis oil gas entrance, tar outlet and gas outlet, described pyrolysis oil gas entrance It is connected with described pyrolysis oil gas vent, for being collected and separating treatment described pyrolysis oil gas, obtain tar and combustion gas;
The described gravity concentration apparatus that slightly breaks includes:Metallized pellet entrance, the outlet of ferronickel granulated iron and a tailings outlet, described gold Belong to pellet entrance to be connected with the outlet of described metallized pellet, for described metallized pellet is slightly broken re-selection process, obtain To ferronickel granulated iron and a tailings;
Described mill ore magnetic selection device includes:One time tailings entrance, ferronickel powder export and the outlet of secondary tailings, a described tail Slag entrance is connected with described tailings outlet, for a described tailings is carried out mill ore magnetic selection process, obtain ferronickel powder with Secondary tailings;
Described fume dust remover includes:High-temperature flue gas entry and high-temperature dust removal exhanst gas outlet, described high-temperature flue gas entry It is connected with the high-temperature flue gas outlet of described rotary hearth furnace, for described high-temperature flue gas are carried out dust removal process, obtain high-temperature dust removal cigarette Gas, described high-temperature dust removal exhanst gas outlet is connected with the heating tube high-temperature dust removal smoke inlet of described rotary hearth furnace, for removing high temperature Cloud of dust gas, as the thermal source of heating tube, heats the material of rotary hearth furnace pyrolysis zone.
Inventor finds, simple according to the system structure of this utility model embodiment, easy to operate, the semicoke after pyrolysis continues The direct reduction reactor continuing participation lateritic nickel ore in rotary hearth furnace obtains metallized pellet, and, metallized pellet is through twice So that the response rate of lateritic nickel ore increases, thus, this system achieves the high efficiente callback of lateritic nickel ore for recycling.Should System can achieve the pyrolysis of coal in lateritic nickel ore Direct Reduction, so that the petroleum resources of preciousness is reclaimed, increased The side-product of rotary hearth furnace coal-based DR process, and, described rotary hearth furnace furnace interior produce fume afterheat can be had Effect recycles, thus, this system achieves environmental protection, indirectly reduces process energy consumption and cost.
According to embodiment of the present utility model, the horizontal cross-section of the described rotary hearth furnace with pyrolysis and restoring function is annulus Shape, the annulus angle 30-100 of described pyrolysis zone.
According to embodiment of the present utility model, the horizontal cross-section of the described rotary hearth furnace with pyrolysis and restoring function is annulus Shape, the annulus angle 240-300 of described reducing zone.
The beneficial effects of the utility model are:
(1)The heat of the fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group that this utility model provides Solution and reduction reaction system and method, can realize the pyrolysis of coal it is achieved that preciousness in lateritic nickel ore Direct Reduction The recovery of petroleum resources, thus, increased the side-product of rotary hearth furnace coal-based DR process, thus, reduce process energy consumption And cost.
(2)The heat of the fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group that this utility model provides Solution and reduction reaction system and method, the semicoke after pyrolysis continues to participate in the direct reduction reactor of lateritic nickel ore in rotary hearth furnace, Obtain metallized pellet.
(3)The heat of the fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group that this utility model provides Solution and reduction reaction system and method, during raw materials for production can adopt, low-order coal produces come the direct-reduction to carry out lateritic nickel ore, Reduce production cost.
(4)The heat of the fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group that this utility model provides Solution and reduction reaction system and method, rotary hearth furnace to heat heating tube using high-temperature dust removal flue gas so that rotary hearth furnace furnace interior The fume afterheat producing can effectively be recycled, thus, this system achieves energy-saving and emission-reduction, environmental protection, reduces cost.
(5)The heat of the fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group that this utility model provides Solution and reduction reaction system and method, metallized pellet that this system obtains is through recycling twice so that lateritic nickel ore The response rate increases, and thus, this system achieves the high efficiente callback of lateritic nickel ore.
Brief description
Fig. 1 be this utility model fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group pyrolysis and The structure chart of reduction reaction system.
Fig. 2 be this utility model fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group pyrolysis and The simple diagram of reduction reaction system.
Wherein, 10, heating tube, 20, partition wall, 30, burner, 40, flue, 50, barricade, 100, dispensing mixing device, 101, Lateritic nickel ore entrance, 102, reduction coal entrance, 103, additive entrance, 104, mixed material outlet, 200, shaped device, 201, Mixed material entrance, 202, mixing pelletizing outlet, 300, drying device, 301, mixing pelletizing entrance, 302, the outlet of dry bulb group, 400th, there is the rotary hearth furnace of pyrolysis and restoring function, 401, dry bulb group entrance, 402, semi-coke entrance, 403, heating tube high-temperature dust removal Smoke inlet, 404, metallized pellet outlet, 405, pyrolysis oil gas vent, 406, high-temperature flue gas outlet, 500, petroleum vapor recovery dress Put, 501, pyrolysis oil gas entrance, 502, tar outlet, 503, gas outlet, 600, slightly break gravity concentration apparatus, 601, metallized pellet Entrance, the outlet of 602, tailings, 603, the outlet of ferronickel granulated iron, 700, mill ore magnetic selection device, 701, tailings entrance, 702, Ferronickel powder exports, and 703, the outlet of secondary tailings, 800, fume dust remover, 801, high-temperature flue gas entry, 802, high-temperature dust removal cigarette Gas exports.
Specific embodiment
In order that those skilled in the art more fully understand the technical solution of the utility model, with reference to specific embodiment The utility model is described in further detail.The embodiments described below is exemplary, is only used for explaining that this practicality is new Type, and it is not intended that to restriction of the present utility model.Unreceipted particular technique or condition in embodiment, according in the art The technology described by document or condition or carry out according to product description.
According to one side of the present utility model, this utility model provides a kind of fume afterheat furnace interior recycling type The pyrolysis of high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system, its structure is as shown in figure 1, this system includes:Dispensing is mixed Material device 100, shaped device 200, drying device 300, there is pyrolysis and the rotary hearth furnace 400 of restoring function, device for recovering oil and gas 500th, gravity concentration apparatus 600, mill ore magnetic selection device 700 and fume dust remover 800 are slightly broken.Fig. 2 is this utility model fume afterheat The pyrolysis of furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group and the simple diagram of reduction reaction system, as illustrated, Described dispensing mixing device includes:Lateritic nickel ore entrance 101, reduction coal entrance 102, additive entrance 103 and mixed material go out Mouth 104, for lateritic nickel ore, reduction coal and additive are carried out dispensing mixing treatment, obtains mixed material;Described shaped device Including:Mixed material entrance 201 and mixing pelletizing outlet 202, described mixed material entrance is connected with the outlet of described mixed material, For described mixed material is carried out forming processes, obtain mixing pelletizing;Described drying device includes:Mixing pelletizing entrance 301 Roll into a ball outlet 302 with dry bulb, described mixing pelletizing entrance is connected with described mixing pelletizing outlet, for carrying out described mixing pelletizing Dried, obtains dry bulb group;Described have pyrolysis and the rotary hearth furnace of restoring function includes:Adjacent feed zone, pyrolysis successively Area, reducing zone and discharge zone;Described device for recovering oil and gas includes:Pyrolysis oil gas entrance 501, tar outlet 502 and gas outlet 503, described pyrolysis oil gas entrance is connected with described pyrolysis oil gas vent;The described gravity concentration apparatus that slightly breaks includes:Metallized pellet enters 601, tailings outlet 602 of mouth and ferronickel granulated iron outlet 603, described metallized pellet entrance and described metallized pellet outlet It is connected;Described mill ore magnetic selection device includes:One time tailings entrance 701, ferronickel powder export 702 and secondary tailings outlet 703, described One time tailings entrance is connected with described tailings outlet;Described fume dust remover includes:High-temperature flue gas entry 801 and high temperature Dedusting exhanst gas outlet 802, described high-temperature flue gas entry is connected with the high-temperature flue gas outlet of described rotary hearth furnace, described high-temperature dust removal cigarette Gas outlet is connected with the heating tube high-temperature dust removal smoke inlet of described rotary hearth furnace.
Inventor finds, simple according to the system structure of this utility model embodiment, easy to operate, the semicoke after pyrolysis continues The direct reduction reactor continuing participation lateritic nickel ore in rotary hearth furnace obtains metallized pellet, and, metallized pellet is through twice So that the response rate of lateritic nickel ore increases, thus, this system achieves the high efficiente callback of lateritic nickel ore for recycling.Should System can achieve the pyrolysis of coal in lateritic nickel ore Direct Reduction, so that the petroleum resources of preciousness is reclaimed, increased The side-product of rotary hearth furnace coal-based DR process, and, described rotary hearth furnace furnace interior produce fume afterheat can be had Effect recycles, thus, this system achieves environmental protection, indirectly reduces process energy consumption and cost.
According to specific embodiment of the utility model, described have pyrolysis and the rotary hearth furnace of restoring function includes:Phase successively Adjacent feed zone, pyrolysis zone, reducing zone and discharge zone, wherein, described pyrolysis zone respectively with described feed zone, described reducing zone it Between be provided with partition wall 20, be provided with barricade 50 between described reducing zone and described discharge zone, described partition wall and described barricade are all by institute The roof stating rotary hearth furnace extends downwardly, and keeps certain intervals with the cloth tray of described rotary hearth furnace.Thus, described reducing zone with go out Barricade between material area can separate Liang Ge area effectively, ensure that reducing zone atmosphere is stable.
According to specific embodiment of the utility model, described feed zone furnace wall is provided with dry bulb group's entrance 401 and semi-coke enters Mouth 402, described dry bulb group entrance is exported with described dry bulb group and is connected, and described dry bulb group's entrance and semi-coke entrance are respectively used to do Pelletizing and semi-coke add in described rotary hearth furnace;Described pyrolysis zone furnace wall is provided with heating tube high-temperature dust removal smoke inlet 403 and heat Solution oil gas vent 405, heating tube high-temperature dust removal flue gas is sent into described rotary hearth furnace by described heating tube high-temperature dust removal smoke inlet Heated in heating tube, described pyrolysis oil gas vent is used for being pyrolyzed the oil gas described rotary hearth furnace of discharge;Described reducing zone furnace wall It is provided with high-temperature flue gas outlet 406, the high-temperature flue gas for producing the reducing zone of described rotary hearth furnace are discharged;Described discharge zone stove Wall is provided with metallized pellet outlet 404, for discharging metallized pellet.Thus, flue 40 is located at also by described rotary hearth furnace Former area, the flue gas of generation after dedusting the thermal source directly as pyrolysis zone heating tube it is achieved that the flue gas that produces of furnace interior Waste heat can effectively be recycled, thus, this system achieves environmental protection, indirectly reduces process energy consumption and cost.
According to specific embodiment of the utility model, the concrete shape of the described rotary hearth furnace with pyrolysis and restoring function is not It is particularly limited, as long as being capable of lateritic nickel ore dry bulb group is pyrolyzed and reduction reaction.Of the present utility model In some embodiments, the horizontal cross-section of the described rotary hearth furnace with pyrolysis and restoring function is annular, and, shared by each area Annulus angle be not particularly limited.Preferably, the annulus angle 30-100 of described pyrolysis zone, the annulus folder of described reducing zone Angle 240-300 is it is ensured that good pyrolysis effect and reduction effect.
According to specific embodiment of the utility model, described have pyrolysis and restoring function the pyrolysis zone of rotary hearth furnace plus Hot mode is not particularly limited, as long as raw material can be heated.In some embodiments of the present utility model, described pyrolysis Area is heated by the way of heating tube, and further, described heating tube may be mounted inside the furnace wall of described pyrolysis zone, Multiple heating tubes 10 can be set.In some embodiments of the present utility model, described heating tube includes body and internal heat resource, First heat body to hot mode for internal heat resource, body transfers heat in stove again, and this process is not disturbed to furnace atmosphere Dynamic.Thus it is achieved that heating to the raw material of described pyrolysis zone.
According to specific embodiment of the utility model, described have pyrolysis and restoring function the reducing zone of rotary hearth furnace plus Hot mode is not particularly limited, as long as raw material can be heated.In some embodiments of the present utility model, described reduction Area is heated by the way of burner, and further, described burner may be mounted inside the furnace wall of described reducing zone, permissible Multiple burners 30 are set.In some embodiments of the present utility model, radiant heat transfer is passed through using the heat that burner combustion produces Mode passing to pelletizing.Because the burning of burner naked light has the advantage that burning capacity is big, heating-up temperature is high(Up to 1500 ℃), thus it is achieved that heating to the raw material of described reducing zone.
According to specific embodiment of the utility model, this system also includes described device for recovering oil and gas, as long as can be to heat Solution oil gas carries out reclaiming.In some embodiments of the present utility model, described device for recovering oil and gas includes:Pyrolysis oil gas enters Mouthful, tar outlet and gas outlet, described pyrolysis oil gas entrance is connected with described pyrolysis oil gas vent, for by described pyrolysis oil Gas is collected and separating treatment, obtains tar and combustion gas, so that the petroleum resources of preciousness is reclaimed.Thus, effectively by institute State generation pyrolysis oil gas in rotary hearth furnace to be recycled, so that the petroleum resources of preciousness is reclaimed, thus, increased rotary hearth furnace The side-product of coal-based DR process, reduces process energy consumption and cost indirectly.
According to specific embodiment of the utility model, this system also includes described fume dust remover, for high temperature cigarette Gas carries out dust removal process, obtains high-temperature dust removal flue gas.In some embodiments of the present utility model, described fume dust remover bag Include:The high-temperature flue gas outlet of high-temperature flue gas entry and high-temperature dust removal exhanst gas outlet, described high-temperature flue gas entry and described rotary hearth furnace It is connected, for described high-temperature flue gas are carried out dust removal process, obtain high-temperature dust removal flue gas, described high-temperature dust removal exhanst gas outlet and institute The heating tube high-temperature dust removal smoke inlet stating rotary hearth furnace is connected, and, heats as the thermal source of heating tube for using high-temperature dust removal flue gas The material of rotary hearth furnace pyrolysis zone.Thus, the fume afterheat that described rotary hearth furnace furnace interior produces can effectively be recycled, from And, this system achieves environmental protection, reduces cost.
According to specific embodiment of the utility model, this system includes described slightly breaking gravity concentration apparatus, as long as can will be described Metallized pellet is slightly broken re-selection process.In some embodiments of the present utility model, described slightly broken gravity concentration apparatus bag Include:Metallized pellet entrance, the outlet of ferronickel granulated iron and a tailings outlet, described metallized pellet entrance and described metallization ball Group's outlet is connected, and for slightly described metallized pellet is broken re-selection process, obtains ferronickel granulated iron and a tailings.
According to specific embodiment of the utility model, this system includes described mill ore magnetic selection device, as long as can will be described Tailings carries out mill ore magnetic selection and processes.In some embodiments of the present utility model, described mill ore magnetic selection device includes: One time tailings entrance, ferronickel powder export and the outlet of secondary tailings, and a described tailings entrance is connected with described tailings outlet, For a described tailings is carried out mill ore magnetic selection process, obtain ferronickel powder and secondary tailings.Thus, this system achieves laterite The high efficiente callback of nickel minerals.
According to embodiment of the present utility model, the furnace bottom of the described rotary hearth furnace with pyrolysis and restoring function can be covered with one Layer semi-coke is it is preferred that the thickness of described semi-coke is 5-15mm.Because lateritic nickel ore direct-reduction produces the temperature of granulated iron technique Higher so that slag in half molten state and be bonded in furnace bottom impact discharging.So, the furnace bottom in rotary hearth furnace completes one layer in advance Semi-coke, thus, the slag that effectively prevent semi-molten state is bonded in furnace bottom, facilitates discharging.
In other side of the present utility model, this utility model provide one kind carried out using foregoing system red Native nickel minerals pyrolysis and the method for reduction reaction, comprise the following steps:
(1)Lateritic nickel ore, reduction coal and additive addition dispensing mixing device is carried out batch mixing and dispensing is processed, mixed Compound material.
(2)Mixed material addition shaped device is carried out forming processes, obtains mixing pelletizing.
(3)Mixing pelletizing is added drying device to be dried process, obtains dry bulb group.
(4)Dry bulb group is added in the rotary hearth furnace have pyrolysis and restoring function and is pyrolyzed and reduction treatment, obtain Pyrolysis oil gas and metallized pellet.
According to specific embodiment of the utility model, described have pyrolysis and the rotary hearth furnace of restoring function includes:Phase successively Adjacent feed zone, pyrolysis zone, reducing zone and discharge zone, wherein, described pyrolysis zone respectively with described feed zone, described reducing zone it Between be provided with partition wall, be provided with barricade between described reducing zone and described discharge zone, described partition wall and described barricade are all by described turn The roof of bottom stove extends downwardly, and keeps certain intervals with the cloth tray of described rotary hearth furnace.Described dry bulb group has heat described The rotary hearth furnace of solution and restoring function carries out being pyrolyzed and the reaction temperature of reduction treatment is:Pyrolysis temperature 400-900 DEG C of pyrolysis zone, In described pyrolysis zone, the reduction coal that described dry bulb is rolled into a ball is carried out with pyrolysis processing to obtain being pyrolyzed oil gas;The reduction temperature of reducing zone 1350-1450 DEG C, in described reducing zone, the pelletizing after pyrolysis is reduced, to reach good reduction effect, finally give Metallized pellet discharges rotary hearth furnace in discharge zone.Thus, this system can achieve coal in lateritic nickel ore Direct Reduction The direct reduction reactor that semicoke after pyrolysis, and, pyrolysis continues to participate in lateritic nickel ore in rotary hearth furnace obtains metallized pellet.
Described device for recovering oil and gas, for being collected and separating treatment described pyrolysis oil gas, obtains tar and combustion gas, The petroleum resources of preciousness is made to be reclaimed.Thus, effectively recycled producing pyrolysis oil gas in described rotary hearth furnace, made Valuable petroleum resources is reclaimed, thus, increased the side-product of rotary hearth furnace coal-based DR process, indirectly reduce work Artistic skill consumption and cost.Described fume dust remover, for described high-temperature flue gas are carried out dust removal process, obtains high-temperature dust removal cigarette Gas, described high-temperature dust removal exhanst gas outlet is connected with the heating tube high-temperature dust removal smoke inlet of described rotary hearth furnace, for removing high temperature Cloud of dust gas, as the thermal source of heating tube, heats the material of rotary hearth furnace pyrolysis zone.Thus, the cigarette that described rotary hearth furnace furnace interior produces Gas waste heat can effectively be recycled, thus, this system achieves environmental protection, reduces cost.
(5)Metallized pellet is added slightly broken gravity concentration apparatus slightly to be broken re-selection process, obtains ferronickel granulated iron and a tail Slag.According to specific embodiment of the utility model, the described gravity concentration apparatus that slightly breaks is used for for described metallized pellet slightly being broken weight Choosing is processed, and obtains ferronickel granulated iron and a tailings.Thus, this system achieves the efficient recovery of lateritic nickel ore, has obtained ferronickel Granulated iron.
(6)Tailings is added mill ore magnetic selection device to carry out mill ore magnetic selection process, obtains ferronickel powder and secondary tailings.Root According to specific embodiment of the utility model, described mill ore magnetic selection device, for a described tailings is carried out mill ore magnetic selection process, Obtain ferronickel powder and secondary tailings.Thus, this system is by the recycling to a tailings, has obtained ferronickel powder it is achieved that red The high efficiente callback of native nickel minerals.
Inventor finds, simple according to the system structure of this utility model embodiment, easy to operate, the semicoke after pyrolysis continues The direct reduction reactor continuing participation lateritic nickel ore in rotary hearth furnace obtains metallized pellet, and, metallized pellet is through twice So that the response rate of lateritic nickel ore increases, thus, this system achieves the high efficiente callback of lateritic nickel ore for recycling.Should System can achieve the pyrolysis of coal in lateritic nickel ore Direct Reduction, so that the petroleum resources of preciousness is reclaimed, increased The side-product of rotary hearth furnace coal-based DR process, and, described rotary hearth furnace furnace interior produce fume afterheat can be had Effect recycles, thus, this system achieves environmental protection, indirectly reduces process energy consumption and cost.
Embodiment 1
By lateritic nickel ore(Containing Ni 1.85%), bituminous coal(Volatile matters 25%)With sodium carbonate in mass ratio 100:10:5 in batch mixing Carry out dispensing, mixing treatment obtains mixed material, mixed material carries out forming processes in shaped device and obtains in proportioner Then mixing pelletizing is dried process in drying device and obtains dry bulb group by mixing pelletizing(Aqueous 1.0%), then will do Pelletizing is pyrolyzed and reduction treatment in having the rotary hearth furnace of pyrolysis and restoring function, and rotary furnace bottom is distributed into prior to dry bulb group One layer of 5mm thickness semi-coke, the annulus angle 30 of pyrolysis zone, 500 DEG C of pyrolysis zone temperature, the annulus angle 300 of reducing zone, reducing zone 1350 DEG C of temperature, the high-temperature dust removal flue gas of the origin of heat rotary hearth furnace of pyrolysis zone heating tube, pyrolysis and reduction reaction finish and obtain Pyrolysis oil gas processed by device for recovering oil and gas and obtain tar and combustion gas, metallized pellet send into slightly break carry out in gravity concentration apparatus thick Broken re-selection process obtains the ferronickel granulated iron of mean diameter 3mm(Containing Ni 8.56%, Fe 90.48%)With a tailings, a tailings Be re-fed into mill ore magnetic selection equipment carry out mill ore magnetic selection process obtain ferronickel powder(Containing Ni 4.61%, TFe 62.72%)With secondary tail Slag, whole flow process nickel recovery 95%, recycle high-temperature dust removal fume afterheat energy-conservation 15%.
Embodiment 2
By lateritic nickel ore(Containing Ni 2.45%), brown coal(Volatile matters 40%)With limestone in mass ratio 100:30:15 in batch mixing Carry out dispensing, mixing treatment obtains mixed material, mixed material carries out forming processes in shaped device and obtains in proportioner Then mixing pelletizing is dried process in drying device and obtains dry bulb group by mixing pelletizing(Aqueous 1.5%), by dry bulb group It is pyrolyzed and reduction treatment in there is the rotary hearth furnace of pyrolysis and restoring function, rotary furnace bottom is distributed into one layer prior to dry bulb group 10mm thickness semi-coke, the annulus angle 60 of pyrolysis zone, 700 DEG C of pyrolysis zone temperature, the annulus angle 270 of reducing zone, reducing zone temperature 1400 DEG C of degree, the high-temperature dust removal flue gas of the origin of heat rotary hearth furnace of pyrolysis zone heating tube, pyrolysis and reduction reaction finish and obtain Pyrolysis oil gas is processed by device for recovering oil and gas and obtains tar and combustion gas, and metallized pellet is sent into slightly to break in gravity concentration apparatus and slightly broken Re-selection process obtains the ferronickel granulated iron of mean diameter 4mm(Containing Ni 7.53%, Fe 91.81%)With a tailings, a tailings is again Feeding mill ore magnetic selection equipment carries out mill ore magnetic selection process and obtains ferronickel powder(Containing Ni 5.82%, TFe 64.67%)With secondary tailings, Whole flow process nickel recovery 96%, recycles high-temperature dust removal fume afterheat energy-conservation 10%.
Embodiment 3
By lateritic nickel ore(Containing Ni 1.12%), ub-bituminous coal(Volatile matters 35%)With Calx in mass ratio 100:20:9 in batch mixing Carry out dispensing, mixing treatment obtains mixed material, mixed material carries out forming processes in shaped device and obtains in proportioner Then mixing pelletizing is dried process in drying device and obtains dry bulb group by mixing pelletizing(Aqueous 0.5%), by dry bulb group It is pyrolyzed and reduction treatment in there is the rotary hearth furnace of pyrolysis and restoring function, rotary furnace bottom is distributed into one layer prior to dry bulb group 15mm thickness semi-coke, the annulus angle 90 of pyrolysis zone, 900 DEG C of pyrolysis zone temperature, 1450 DEG C of reducing zone temperature, the annulus of reducing zone Angle 240, the high-temperature dust removal flue gas of the origin of heat rotary hearth furnace of pyrolysis zone heating tube, pyrolysis and reduction reaction finish and obtain Pyrolysis oil gas is processed by device for recovering oil and gas and obtains tar and combustion gas, and metallized pellet is sent into slightly to break in gravity concentration apparatus and slightly broken Re-selection process obtains the ferronickel granulated iron of mean diameter 2.5mm(Containing Ni 6.23%, Fe 92.72%)With a tailings, a tailings Be re-fed into mill ore magnetic selection equipment carry out mill ore magnetic selection process obtain ferronickel powder(Containing Ni 3.83%, TFe 73.83%)With secondary tail Slag, whole flow process nickel recovery 97%, recycle high-temperature dust removal fume afterheat energy-conservation 8%.
It is to be understood that term " first ", " second " are only used for describing purpose in description of the present utility model, and It is not intended that instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define The feature of " first ", " second " can be expressed or implicitly include one or more this feature.
In this utility model, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " Gu Fixed " etc. term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integral;Can be It is mechanically connected or electrically connect;Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be two The connection of element internal or the interaction relationship of two elements.For the ordinary skill in the art, can basis Concrete condition understands concrete meaning in this utility model for the above-mentioned term.
In this utility model, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score Can be the first and second feature directly contacts, or the first and second features pass through intermediary mediate contact.And, first is special Levy second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " permissible Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this embodiment or example Point is contained at least one embodiment of the present utility model or example.In this manual, the schematic table to above-mentioned term State that be not necessarily referring to is identical embodiment or example.And, the specific features of description, structure, material or feature can be Combine in an appropriate manner in any one or more embodiments or example.Additionally, in the case of not conflicting, this area Technical staff the feature of the different embodiments described in this specification or example and different embodiment or example can be entered Row combines and combines.
Although of the present utility model embodiment has been shown and described above it is to be understood that above-described embodiment is Exemplary it is impossible to be interpreted as that those of ordinary skill in the art is in scope of the present utility model to restriction of the present utility model Interior above-described embodiment can be changed, change, replacing and modification, simultaneously for one of ordinary skill in the art, foundation The thought of the application, all will change in specific embodiments and applications.

Claims (3)

1. a kind of pyrolysis of fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system, It is characterized in that, including:Dispensing mixing device, shaped device, drying device, there is pyrolysis and the rotary hearth furnace of restoring function, oil Gas recovering device, slightly broken gravity concentration apparatus, mill ore magnetic selection device and fume dust remover, wherein;
Described dispensing mixing device includes:Lateritic nickel ore entrance, reduction coal entrance, additive entrance and mixed material outlet, use In lateritic nickel ore, reduction coal and additive are carried out dispensing mixing treatment, obtain mixed material;
Described shaped device includes:Mixed material entrance and mixing pelletizing outlet, described mixed material entrance and described mixture Material outlet is connected, and for described mixed material is carried out forming processes, obtains mixing pelletizing;
Described drying device includes:Mixing pelletizing entrance and the outlet of dry bulb group, described mixing pelletizing entrance mixes pelletizing with described Outlet is connected, and for described mixing pelletizing is dried process, obtains dry bulb group;
Described have pyrolysis and the rotary hearth furnace of restoring function includes:Adjacent feed zone, pyrolysis zone, reducing zone and discharging successively Area, wherein, described pyrolysis zone is provided with partition wall respectively and described feed zone, described reducing zone between, described reducing zone with described go out Material area between be provided with barricade, described partition wall and described barricade are all to be extended downwardly by the roof of described rotary hearth furnace, and with described turn The cloth tray of bottom stove keeps certain intervals;Wherein, it is provided with multiple heating tubes, for described pyrolysis inside the furnace wall of described pyrolysis zone Area carries out heating tube mode heating;Described reducing zone is provided with multiple burners inside furnace wall, for carrying out burner to described reducing zone Mode heats;Described feed zone furnace wall is provided with dry bulb group's entrance and semi-coke entrance, and described pyrolysis zone furnace wall is provided with heating tube High-temperature dust removal smoke inlet and pyrolysis oil gas vent, described reducing zone furnace wall is provided with high-temperature flue gas outlet, described discharge zone stove Wall is provided with metallized pellet outlet, and described dry bulb group entrance is exported with described dry bulb group and is connected;
Described device for recovering oil and gas includes:Pyrolysis oil gas entrance, tar outlet and gas outlet, described pyrolysis oil gas entrance and institute State pyrolysis oil gas vent to be connected, for being collected and separating treatment described pyrolysis oil gas, obtain tar and combustion gas;
The described gravity concentration apparatus that slightly breaks includes:Metallized pellet entrance, the outlet of ferronickel granulated iron and a tailings outlet, described metallization Pelletizing entrance is connected with the outlet of described metallized pellet, for slightly described metallized pellet is broken re-selection process, obtains nickel Abrasive grit ferrum and a tailings;
Described mill ore magnetic selection device includes:One time tailings entrance, ferronickel powder export and the outlet of secondary tailings, and a described tailings enters Mouthful it is connected with described tailings outlet, for a described tailings is carried out mill ore magnetic selection process, obtain ferronickel powder and secondary Tailings;
Described fume dust remover includes:High-temperature flue gas entry and high-temperature dust removal exhanst gas outlet, described high-temperature flue gas entry and institute The high-temperature flue gas outlet stating rotary hearth furnace is connected, and for described high-temperature flue gas are carried out dust removal process, obtains high-temperature dust removal flue gas, institute State high-temperature dust removal exhanst gas outlet to be connected with the heating tube high-temperature dust removal smoke inlet of described rotary hearth furnace, for by high-temperature dust removal flue gas As the thermal source of heating tube, heat the material of rotary hearth furnace pyrolysis zone.
2. system according to claim 1 is it is characterised in that described have the level being pyrolyzed with the rotary hearth furnace of restoring function Section is annular, the annulus angle 30-100 of described pyrolysis zone.
3. system according to claim 1 is it is characterised in that described have the level being pyrolyzed with the rotary hearth furnace of restoring function Section is annular, the annulus angle 240-300 of described reducing zone.
CN201621051925.XU 2016-09-13 2016-09-13 A kind of pyrolysis of fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system Expired - Fee Related CN205990448U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106222449A (en) * 2016-09-13 2016-12-14 江苏省冶金设计院有限公司 The pyrolysis of a kind of fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106222449A (en) * 2016-09-13 2016-12-14 江苏省冶金设计院有限公司 The pyrolysis of a kind of fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system and method
CN106222449B (en) * 2016-09-13 2018-08-28 江苏省冶金设计院有限公司 A kind of pyrolysis of fume afterheat furnace interior recycling type high efficiente callback lateritic nickel ore dry bulb group and reduction reaction system and method

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