CN206607251U - The system that laterite nickel ore pellet is reduced after gas water steam reformation - Google Patents
The system that laterite nickel ore pellet is reduced after gas water steam reformation Download PDFInfo
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- CN206607251U CN206607251U CN201720203856.8U CN201720203856U CN206607251U CN 206607251 U CN206607251 U CN 206607251U CN 201720203856 U CN201720203856 U CN 201720203856U CN 206607251 U CN206607251 U CN 206607251U
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- gas outlet
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- top gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]
Abstract
The utility model is related to the system that laterite nickel ore pellet is reduced after gas water steam reformation.The system includes shaft furnace, carries hydrogen production device, preheating device, heater；Shaft furnace has lateritic nickel ore pelletizing entrance, heating gaseous mixture entrance, top gas outlet, sponge iron outlet；Carrying hydrogen production device has top gas entrance, hydrogen outlet, rich CO gas outlet, and the top gas outlet of top gas entrance and shaft furnace is connected；Preheating device has air inlet, mixed gas outlet, and air inlet is connected with carrying the hydrogen outlet of hydrogen production device, for being passed through natural gas, hydrogen, water vapour into preheating device；Heater has gaseous mixture entrance, heating mixed gas outlet, the mixed gas outlet connection of gaseous mixture entrance and preheating device, the heating gaseous mixture entrance connection of heating mixed gas outlet and shaft furnace.The utility model avoids the expense of reburner and the consumption of nickel-base catalyst, and also hydrogen content is high in Primordial Qi, and the sponge iron degree of metalization of preparation is high, and the recycling of heat can be achieved.
Description
Technical field
The utility model is related to metallurgical technology field, and in particular to reduce lateritic nickel ore after a kind of gas water steam reformation
The system of pelletizing.
Background technology
DRI is also known as sponge iron, be it is a kind of it is important replace steel scrap and better than the steelmaking feed of steel scrap, can be dilute
The impurity element components in steel scrap are released, essential pure iron material is provided for electric furnace steel making.Development of iron and steel enterprises is directly also
Former iron technology, the requirement that the epoch that can better adapt to develop to enterprise to densification, high efficiency, purifying direction.
2014, whole world DRI yield was 74,550,000 tons.Wherein, by accounting for that gas-based shaft kiln method is produced
80%.Typical technique includes MIDREX techniques and HYL III (Energiron) technique.
MIDREX methods, with top gas as transforming agent, high-quality reduction are obtained through reforming reaction using natural gas as unstripped gas
Gas.Top gas is after the dedusting that cools, wherein 60~70% mix with natural gas according to chemical reaction equivalent after compression, it is preheated
Device is preheated, and then passes through the reformer equipped with Raney nickel.In reformer, natural gas and the CO in top gas2And H2O occurs
Reforming reaction, obtain 850~900 DEG C also Primordial Qi, then the reduction pneumatic transmission is entered in shaft furnace.The acid pellet or lump ore of iron content
In shaft furnace DRI is obtained through also Primordial Qi reduction.DRI is discharged perpendicular after the cooling section cooling through shaft furnace bottom
Stove.The cooling gas of cooling section is discharged from shaft furnace, then after water scrubber washing and compressor pressure-raising, sends shaft furnace recycling back to.
But, in this method, reformer involves great expense, and maintenance cost is higher.Also, the sulphur in gas can cause the reformation in reformer
Catalyst poisoning.Therefore, the sulfur content in strict control ore and coal gas is needed in the technique.
The techniques of HYL III are being reformed using natural gas and part top gas as raw material by raw natural gas, transforming agent vapor
Catalytic reforming reaction in stove produces also Primordial Qi.The also Primordial Qi produced by reformer, passes through heat reclaim unit, washing cooling
Device processing, is then mixed with top gas of the part through washing cooling, desulfurization and decarburization.The obtained heated stove heat of gaseous mixture is extremely
900~950 DEG C, then pass in shaft furnace, reduction-oxidation pelletizing or lump ore.But, in the technique, operating pressure is higher, to anti-
Answer the requirement of device higher.Also, the high temperature reduction gas produced by reburner, need to reduce oxidizability, Ran Houzai through cooling de-watering
Heat temperature raising.Therefore, in technique less rationally, consume energy higher.
Utility model content
The utility model aims to provide the system that laterite nickel ore pellet is reduced after a kind of gas water steam reformation, this practicality
New system can reduce the metallic nickel of generation as the catalyst of reforming reaction by the use of lateritic nickel ore, effectively using methane,
Also hydrogen content is higher in Primordial Qi, reduces energy consumption of reaction.
The utility model provides the system that laterite nickel ore pellet is reduced after a kind of gas water steam reformation, including perpendicular
Stove, carry hydrogen production device, preheating device, heater.
The shaft furnace has lateritic nickel ore pelletizing entrance, heating gaseous mixture entrance, top gas outlet, sponge iron outlet.
The hydrogen production device that carries has top gas entrance, hydrogen outlet, rich CO gas outlet.The top gas entrance
It is connected with the top gas outlet of the shaft furnace.
The preheating device has air inlet, mixed gas outlet.The air inlet and the hydrogen outlet for carrying hydrogen production device
Connection, for being passed through natural gas, hydrogen, water vapour into the preheating device.
The heater has gaseous mixture entrance, heating mixed gas outlet.The gaseous mixture entrance and the pre- hot charging
The mixed gas outlet connection put.The heating mixed gas outlet is connected with the heating gaseous mixture entrance of the shaft furnace.
Further, the heater also has rich carbon monoxide gas inlet, exhanst gas outlet.The rich carbon monoxide
Gas access is connected with the rich CO gas outlet for carrying hydrogen production device.
The preheating device also has smoke inlet.The smoke inlet is connected with the exhanst gas outlet of the heater.
Further, said system is also including the cooling and dedusting device being sequentially connected, compression set, decarbonization device.It is described
Cooling and dedusting device has top gas entrance, and the top gas entrance is connected with the top gas outlet of the shaft furnace.The decarburization
Device has top gas outlet, and the top gas outlet is connected with the top gas entrance for carrying hydrogen production device.
The utility model can carry out the reformation of methane steam directly in shaft furnace, and methane reforming conversion is not used alone
Stove, reduces the expense of reburner and the consumption of nickel-base catalyst.Moreover, avoiding the sulphur contained in top gas to catalyst
Harm, has widened the scope of iron ore selection.
Hydrogen production device is carried in the utility model, can be to responseless CO and H in top gas2Separated.Wherein, it will divide
From fuel gas of the obtained rich CO gas as heater.Also, hydrogen is with that after natural gas mixing reforming, can improve
The content of hydrogen also in Primordial Qi, promotes the reduction of acid pellet, improves the degree of metalization of the sponge iron prepared.
The utility model uses the high-temperature flue gas that heater is produced as the pre- hot gas of preheating device, is effectively utilized height
The heat energy of warm flue gas.Preheated low pressure water vapor is mixed with natural gas, hydrogen, can reduce laterite nickel ore pellet process for postorder
Oxidant is provided.The utility model provides oxidant by the way of steam humidification, it is possible to decrease the heat needed for reforming reaction, and
Hydrogen content in increase also Primordial Qi.
Brief description of the drawings
Fig. 1 illustrates for the system of reduction laterite nickel ore pellet after gas water steam reformation in the utility model embodiment
Figure.
Fig. 2 is that the utility model reduces laterite nickel ore pellet using the system shown in Fig. 1 after gas water steam reformation
Method flow schematic diagram.
Reference in accompanying drawing is as follows：
1st, shaft furnace；2nd, cooling and dedusting device；3rd, compression set；4th, decarbonization device；5th, hydrogen production device is carried；6th, preheating device；7、
Heater.
Embodiment
Below in conjunction with drawings and examples, embodiment of the present utility model is described in more details, with
Just scheme of the present utility model and the advantage of its various aspects be better understood when.However, specific implementations described below
Mode and embodiment are only the purposes of explanation, rather than to limitation of the present utility model.
By Fig. 1, the system of reduction laterite nickel ore pellet includes after the gas water steam reformation that the utility model is provided：It is perpendicular
Stove 1, carry hydrogen production device 5, preheating device 6, heater 7.
Shaft furnace 1 has lateritic nickel ore pelletizing entrance, heating gaseous mixture entrance, top gas outlet, sponge iron outlet.
Hydrogen production device 5 is carried with top gas entrance, hydrogen outlet, rich CO gas outlet.Top gas entrance and shaft furnace 1
Top gas outlet connection.
Preheating device 6 has air inlet, smoke inlet, mixed gas outlet.Air inlet and the hydrogen outlet company for carrying hydrogen production device 5
Connect.The air inlet of preheating device 6 is used to be passed through natural gas, hydrogen, water vapour into preheating device 6, and is preheated.
Heater 7 has gaseous mixture entrance, rich carbon monoxide gas inlet, heating mixed gas outlet, exhanst gas outlet.Should
Gaseous mixture entrance is connected with the mixed gas outlet of preheating device 6.The heating gaseous mixture entrance of heating mixed gas outlet and shaft furnace 1 connects
Connect.Rich CO gas outlet of the rich carbon monoxide gas inlet with carrying hydrogen production device 5 is connected.Exhanst gas outlet and preheating device 6
Smoke inlet connection.
In not be the same as Example of the present utility model, the system also includes cooling and dedusting device 2, the compression dress being sequentially connected
Put 3, decarbonization device 4.Wherein, cooling and dedusting device 2 has top gas entrance, and the top gas of the top gas entrance and shaft furnace 1 goes out
Mouth connection.Decarbonization device 4 is exported with top gas, and top gas outlet is connected with carrying the top gas entrance of hydrogen production device 5.The system
In be sequentially connected cooling and dedusting device 2, compression set 3, decarbonization device 4, the top gas for being discharged to shaft furnace 1 carries out successively
Cool dedusting, compression, carbonization treatment.Three kinds of devices are applied to different production requirements, or for top gas of different nature.
The utility model also proposed the system shown in a kind of utilization Fig. 1, and laterite is reduced after gas water steam reformation
The method of nickel ore pellet.Fig. 2 is the schematic flow sheet of this method, is comprised the following steps：
(1) the top gas feeding discharged shaft furnace 1 is carried in hydrogen production device 5, respectively obtains hydrogen and rich CO gas.This
In the top gas of utility model, CO and H2Volume account for top gas cumulative volume percentage be 65%~75%.Wherein, a rich oxygen
The volume for changing carbon gas accounts for accounting >=70% of top gas volume.Also, in rich CO gas, CO gases account for a rich oxidation
Accounting >=70% of carbon volume of gas.
In not be the same as Example of the present utility model, before top gas feeding is carried into hydrogen production device, step may also include：First
Top gas is sequentially sent in cooling and dedusting device 2, compression set 3, decarbonization device 4, cooling dedusting, compression is carried out, at decarburization
Reason, to be met the top gas for carrying the feed needs of hydrogen production device 5.
(2) after the hydrogen that above-mentioned steps are obtained is mixed with natural gas, sent into via the air inlet of preheating device 6, water vapour
Also sent into via air inlet in preheating device 6, obtain gaseous mixture.Wherein, the main component in natural gas is methane.The gaseous mixture
In, the volume of vapor and the volume ratio of natural gas are 0.9~1.2:1.Then, gaseous mixture is sent into heater 7 and heated,
Obtain the gaseous mixture that heats up.
In the utility model, the temperature of preheated gaseous mixture is 200~300 DEG C.After gaseous mixture is heated, obtained liter
The temperature of warm gaseous mixture is 900~1000 DEG C.
(3) it will heat up in gaseous mixture feeding shaft furnace 1.Lateritic nickel ore pelletizing is via the lateritic nickel ore pelletizing set on shaft furnace 1
Entrance is sent into.In lateritic nickel ore pelletizing of the present utility model, the mass content of nickel is 0.8~1.5%.The operating pressure of shaft furnace is
0.1~0.2MPa.
In shaft furnace 1, after lateritic nickel ore pelletizing is reduced, metallic iron and metallic nickel are obtained, can be as in heating gaseous mixture
The catalyst of methane and steam reforming reaction.After methane and steam reformation, CO and H is generated2.CO and H2As also Primordial Qi,
During rising in shaft furnace 1, further with lateritic nickel ore pelletizing haptoreaction, lateritic nickel ore pelletizing is reduced, sponge is prepared
Iron, and obtain the top gas.
In the utility model, the rich CO gas that is obtained in hydrogen production device 5 will be carried and sent into heater 7, combustion is used as
Expect gas.Also, burn fuel gas in heater 7 flue gas produced, as pre- hot gas in feeding preheating device 6, realize
The recycling of heat.
Embodiment 1
Natural gas is with carrying after the hydrogen of hydrogen production device discharge is mixed in feeding preheater, and the temperature of natural gas and hydrogen is by 40 DEG C
200 DEG C are risen to, and is mixed with preheated water vapour, gaseous mixture is obtained.Gaseous mixture is heated to 950 DEG C in heating furnace, obtains
Heat up gaseous mixture.Heat up in gaseous mixture feeding shaft furnace, reformation obtains also Primordial Qi, reduction nickel content is 0.9% (mass content)
Lateritic nickel ore pelletizing, obtains sponge iron and top gas.Wherein, the degree of metalization of sponge iron is 96%.
Top gas is after cool dedusting, compression, decarburization, and feeding is carried in hydrogen production device.Sponge iron after cooling, by shaft furnace bottom
Discharge, cooling gas is discharged after shaft furnace, and sending circulating cooling in shaft furnace back to again after washing, compression uses.
Embodiment 2
Natural gas is with carrying after the hydrogen of hydrogen production device discharge is mixed in feeding preheater, and the temperature of natural gas and hydrogen is by 40 DEG C
200 DEG C are risen to, and is mixed with preheated water vapour, gaseous mixture is obtained.Gaseous mixture is heated to 1000 DEG C in heating furnace, obtains
Heat up gaseous mixture.Heat up in gaseous mixture feeding shaft furnace, reformation obtains also Primordial Qi, reduction nickel content is 1.2% (mass content)
Lateritic nickel ore pelletizing, obtains sponge iron and top gas.Wherein, the degree of metalization of sponge iron is 96%.
Top gas is after cool dedusting, compression, decarburization, and feeding is carried in hydrogen production device.Sponge iron directly carries out work without cooling
Industry application.
Embodiment 3
Natural gas is with carrying after the hydrogen of hydrogen production device discharge is mixed in feeding preheater, and the temperature of natural gas and hydrogen is by 60 DEG C
300 DEG C are risen to, and is mixed with preheated water vapour, gaseous mixture is obtained.Gaseous mixture is heated to 900 DEG C in heating furnace, obtains
Heat up gaseous mixture.Heat up in gaseous mixture feeding shaft furnace, reformation obtains also Primordial Qi, reduction nickel content is 1.1% (mass content)
Lateritic nickel ore pelletizing, obtains sponge iron and top gas.Wherein, the degree of metalization of sponge iron is 96%.
Top gas is after cool dedusting, compression, decarburization, and feeding is carried in hydrogen production device.Sponge iron after cooling, by shaft furnace bottom
Discharge, cooling gas is discharged after shaft furnace, and sending circulating cooling in shaft furnace back to again after washing, compression uses.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate the utility model example,
And the not restriction to embodiment.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other changes in different forms.There is no necessity and possibility to exhaust all the enbodiments.And thus
Among the obvious changes or variations amplified out is still in protection domain of the present utility model.
Claims (3)
1. the system of laterite nickel ore pellet is reduced after a kind of gas water steam reformation, it is characterised in that the system includes perpendicular
Stove, carry hydrogen production device, preheating device, heater；
The shaft furnace has lateritic nickel ore pelletizing entrance, heating gaseous mixture entrance, top gas outlet, sponge iron outlet；
The hydrogen production device that carries has top gas entrance, hydrogen outlet, rich CO gas outlet；The top gas entrance and institute
State the top gas outlet connection of shaft furnace；
The preheating device has air inlet, mixed gas outlet；The air inlet is connected with the hydrogen outlet for carrying hydrogen production device,
For being passed through natural gas, hydrogen, water vapour into the preheating device；
The heater has gaseous mixture entrance, heating mixed gas outlet；The gaseous mixture entrance and the preheating device
Mixed gas outlet is connected；The heating mixed gas outlet is connected with the heating gaseous mixture entrance of the shaft furnace.
2. system according to claim 1, it is characterised in that
The heater also has rich carbon monoxide gas inlet, exhanst gas outlet, the rich carbon monoxide gas inlet and institute
State the rich CO gas outlet connection for carrying hydrogen production device；
The preheating device also has smoke inlet, and the smoke inlet is connected with the exhanst gas outlet of the heater.
3. system according to claim 1, it is characterised in that also including be sequentially connected cooling and dedusting device, compression dress
Put, decarbonization device, the cooling and dedusting device has top gas entrance, and the top gas of the top gas entrance and the shaft furnace goes out
Mouth connection, the decarbonization device has top gas outlet, and the top gas outlet connects with the top gas entrance for carrying hydrogen production device
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720203856.8U CN206607251U (en) | 2017-03-03 | 2017-03-03 | The system that laterite nickel ore pellet is reduced after gas water steam reformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720203856.8U CN206607251U (en) | 2017-03-03 | 2017-03-03 | The system that laterite nickel ore pellet is reduced after gas water steam reformation |
Publications (1)
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| CN206607251U true CN206607251U (en) | 2017-11-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720203856.8U Expired - Fee Related CN206607251U (en) | 2017-03-03 | 2017-03-03 | The system that laterite nickel ore pellet is reduced after gas water steam reformation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106755692A (en) * | 2017-03-03 | 2017-05-31 | 江苏省冶金设计院有限公司 | The system and method that laterite nickel ore pellet is reduced after gas water steam reformation |
| CN111232956A (en) * | 2020-02-29 | 2020-06-05 | 太原理工大学 | Device for reforming and reducing iron and generating carbon nano tube by methane and carbon dioxide |
-
2017
- 2017-03-03 CN CN201720203856.8U patent/CN206607251U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106755692A (en) * | 2017-03-03 | 2017-05-31 | 江苏省冶金设计院有限公司 | The system and method that laterite nickel ore pellet is reduced after gas water steam reformation |
| CN111232956A (en) * | 2020-02-29 | 2020-06-05 | 太原理工大学 | Device for reforming and reducing iron and generating carbon nano tube by methane and carbon dioxide |
| CN111232956B (en) * | 2020-02-29 | 2023-02-14 | 太原理工大学 | Device for reforming and reducing iron and generating carbon nano tube by methane and carbon dioxide |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171103 Termination date: 20180303 |