CN206143238U - System for gas melting furnace handles troilite - Google Patents
System for gas melting furnace handles troilite Download PDFInfo
- Publication number
- CN206143238U CN206143238U CN201621267228.8U CN201621267228U CN206143238U CN 206143238 U CN206143238 U CN 206143238U CN 201621267228 U CN201621267228 U CN 201621267228U CN 206143238 U CN206143238 U CN 206143238U
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- rotary hearth
- hearth furnace
- discharging opening
- feeding mouth
- furnace
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Abstract
The utility model discloses a system for gas melting furnace handles troilite. This system includes rotary hearth furnace and gas melting furnace, and the rotary hearth furnace includes pan feeding mouth, discharge gate, exhanst gas outlet and barricade, and the barricade lies in the furnace body of rotary hearth furnace, lies in the annular space separation in the furnace body in the oxidizing roasting district for oxidizing roasting district and reducing roasting district, rotary hearth furnace pan feeding mouth, and commentaries on classics end furnace discharge mouth lies in the reducing roasting district, and the exhanst gas outlet lies in the oxidizing roasting district, gas melting furnace includes pan feeding mouth and discharge gate. The utility model discloses a system realizes the oxidizing roasting and the reducing roasting of troilite in the rotary hearth furnace, reduction effect is good, and metallization rate is high, the gas is melted the branch and is obtained the high -grade molten iron to collect the flue gas that the rotary hearth furnace produced, be used for making sulphuric acid, system simple structure, it is with low costs.
Description
Technical field
This utility model belongs to technical field of smelting, more particularly to the system that point stove processes troilite is melted in a kind of combustion gas.
Background technology
Sulphuric acid be it is a kind of be the important raw material of industry, can be used for manufacture fertilizer, medicine, explosive, pigment, detergent, electric power storage
Pond etc..Troilite is the main sulphur source of China, and the big main distribution provinces and regions that relatively concentrate on of reserves are followed successively by Sichuan, Anhui, interior
Illiteracy, Guangdong and Yunnan, total resources is at the forefront in the world up to 127.8 hundred million tons.
Pyrite cinder (also known as sulfate slag) can be produced in the production process of sulphuric acid, it is the main of chemical industry production
One of solid waste.A large amount of pyrite cinders that China produces every year using landfill process, not only occupy a large amount of soil mostly
Ground, and severe contamination is caused to environment.Meanwhile, 20%～60% ferrum that pyrite cinder contains also is not recycled
Utilize.
Recently as the fast development of steel industry, China increases to the mining inetesity of iron mineral resource, resource grade
The good iron ore deposit of high, sorting is just gradually decreased, and mineral resources can be supplied to ability continuous decrease.Active development difficulty utilizes iron mine
Stone resource, can effectively expand the available iron ore resource amount of China, reduce external dependence degree, ensure the peace of ferrolite supply
Entirely.
A kind of method and its device of existing use producing iron refined powder from troilite, is on the basis of production sulfuric acid apparatus
On, increase raw material mixing system, using fluidized bed furnace discharge slag, in calculate ratio mix troilite in, and with other compositions
Stove roasting is mixed into, product is sulphuric acid, can also obtain Iron concentrate.The Iron concentrate degree of metalization that this technique is obtained is low.
Utility model content
This utility model is intended to propose that the system that point stove processes troilite is melted in a kind of combustion gas, and troilite is realized in rotary hearth furnace
Oxidizing roasting it is integrated with reduction roasting complete, reduction effect is good, and degree of metalization is high, and then combustion gas is molten separately wins to obtain high grade iron
Water, and the flue gas of rotary hearth furnace generation is collected, for manufacturing sulphuric acid.
This utility model provides a kind of combustion gas and melts the system that point stove processes troilite, including molten point of stove of rotary hearth furnace and combustion gas,
The rotary hearth furnace includes feeding mouth, discharging opening, exhanst gas outlet and barricade, and the barricade is located at the stove of the rotary hearth furnace
In vivo, the annular space in the body of heater is divided into into oxidizing roasting area and reduction roasting area, the rotary hearth furnace feeding mouth is located at
The oxidizing roasting area, the rotary hearth furnace discharging opening is located at the reduction roasting area, and the exhanst gas outlet is located at the oxidation roasting
Burn area；
Molten point of stove of the combustion gas includes feeding mouth and discharging opening；
The rotary hearth furnace discharging opening connects molten point of stove feeding mouth of the combustion gas.
Rotary hearth furnace is used for the oxidizing roasting and reduction roasting of troilite, obtains metallized pellet.Molten point of stove of combustion gas is used for gold
The fusing of category pellet is separated, and obtains high-grade molten iron.
The furnace bottom of rotary hearth furnace is rotatable, and the furnace bottom of rotation drives material movement in stove.Troilite dry bulb group is entered by rotary hearth furnace
Material mouth enters oxidizing roasting area, and reduction roasting area, the metallized pellet Jing rotary hearth furnaces after reduction roasting are entered after oxidized roasting
Discharging opening discharges rotary hearth furnace.Exhanst gas outlet is used to collect the flue gas manufacture sulphuric acid of rotary hearth furnace generation.
In this utility model, the system further includes atomizer mill, ball press and drying device,
The atomizer mill includes discharging opening；The ball press includes feeding mouth and discharging opening；The drying device include into
Material mouth and discharging opening；
The atomizer mill discharging opening connects the ball press feeding mouth, and the ball press discharging opening connects the drying device
Feeding mouth, the drying device discharging opening connects the rotary hearth furnace feeding mouth.
Atomizer mill is used to that troilite to be finely ground to the granularity needed for subsequent treatment.Ball press is used for the troilite of fine grinding
Grain pelletizing.Drying device is used for the drying of pelletizing, is that follow-up roasting is prepared.
In this utility model, the rotary hearth furnace further includes reducing agent entrance, and the reducing agent entrance is located at described going back
Furnace roof of the former roast area away from discharge port end.Reducing agent enters rotary hearth furnace by the reducing agent entrance, and in dry bulb, group enters reduction
The dry bulb is rolled into a ball into one layer of reducing agent of uniform fold during roast area.
Specifically, the radian of oxidizing roasting area annular region be 150 °～180 °, the rotary hearth furnace feeding mouth with turn
Sector region radian between the furnace discharge mouth of bottom is 10 °～15 °.
Used as the preferred scheme of this utility model, the barricade bottom is with the distance of the furnace bottom upper surface of the rotary hearth furnace
10～20cm.Barricade bottom to the distance of the furnace bottom upper surface of rotary hearth furnace should ensure passing through for material, and oxygen is ensured again
Change roast area atmosphere and reduction roasting area atmosphere is not interfered with each other.
In this utility model, oxidizing roasting is carried out in oxidizing atmosphere, and by roasting some of Ore composition is made
Generation oxidation reaction, generates new oxide.Troilite (FeS2) long-time is roasted in oxidizing atmosphere (or being passed through large quantity of air)
During burning and O2React generation magnetic iron ore (Fe3O4), magnetic iron ore is easier to be reduced.
In addition, this utility model provides a kind of method that utilization said system processes troilite, comprise the steps：
A, by troilite fine grinding pressure ball, dry bulb group is obtained after being dried；
B, dry bulb group is sent into into the rotary hearth furnace, first carries out oxidizing roasting desulfurization, after carry out reduction roasting, obtain gold
Category pellet, reducing agent enters rotary hearth furnace by the reducing agent entrance, will when dry bulb group enters the reduction roasting area
The dry bulb rolls into a ball one layer of reducing agent of uniform fold, and collecting the flue gas of oxidizing roasting area generation is used to prepare sulphuric acid；
C, by the metallized pellet with addition of quick lime enter melting down 0.5～1h after molten point of stove fusing of combustion gas obtain molten iron and
Slag.
Used as preferred scheme, the rotary hearth furnace oxidizing roasting area temperature is 800～1000 DEG C, and reduction roasting area temperature is
1200～1300 DEG C, the furnace bottom of the rotary hearth furnace rotates a circle the time for 2～5h.
Further, the troilite and carbide slag are finely ground to into the granular mass percentage ratio of granularity≤200 mesh in step A
More than 80%, the dry bulb granule footpath is 10～20mm.
Used as preferred scheme, the mass component of carbon is not less than 80% in the reducing agent, and the reducing agent granularity is 2～
5mm。
Specifically, the mass ratio of metallized pellet described in step C and quick lime is 1:0.05～0.1.
As preferred scheme, in oxidizing roasting oxygen is blasted, the oxygen volume for blasting for volume of fuel 10～
15%.
The system and method that point stove processes troilite are melted in the combustion gas that this utility model is provided, and troilite is prepared after pelletizing,
Integrally complete in the roasting of rotary hearth furnace internal oxidition and reduction roasting；Reduction roasting area makes full use of dry bulb group of oxidizing roasting area sensible heat,
Reduce energy consumption；Troilite restores roasting Jing after desulfurization oxidation, and degree of metalization is high；Make raw material, molten point of combustion gas using troilite
Molten iron is obtained, is that the utilization of resources for expanding iron ore creates condition.
Description of the drawings
Fig. 1 is that the system schematic that point stove processes troilite is melted in this utility model combustion gas；
Fig. 2 is rotary hearth furnace reduction agent entrance partial schematic diagram of the present utility model；
Fig. 3 is the method flow diagram that system of the present utility model processes troilite.
In figure：
1- atomizer mills；2- ball presses；3- drying devices；4- rotary hearth furnaces；
401- rotary hearth furnace feeding mouths；402- rotary hearth furnace discharging openings；403- exhanst gas outlets；404- barricades；405- oxidizing roastings
Area；406- reduction roastings area；407- reducing agent entrances；
Molten point of stove of 5- combustion gas.
Specific embodiment
Below in conjunction with drawings and Examples, specific embodiment of the present utility model is described in more details, with
Just better understood when the advantage of scheme of the present utility model and its various aspects.However, specific implementations described below side
Formula and embodiment are only descriptive purposes, rather than to restriction of the present utility model.
As shown in Figure 1, on the one hand, this utility model embodiment provides a kind of combustion gas and melts the system that point stove processes troilite,
Including：Molten point of stove 5 of atomizer mill 1, ball press 2, drying device 3, rotary hearth furnace 4 and combustion gas.
Atomizer mill 1 includes feeding mouth and discharging opening.Atomizer mill 1 is used to that troilite to be finely ground to the grain needed for subsequent treatment
Degree.
Ball press 2 includes feeding mouth and discharging opening.Ball press 2 is used for troilite granule pelletizing.Spherical material is more sharp
In the thermally equivalent in rotary hearth furnace.Suitable pellet size makes pelletizing heat transfer good, reaches good reduction effect.
Drying device 3 includes feeding mouth and discharging opening.Drying device 3 is used for the drying of pelletizing, is that follow-up roasting is prepared.
Rotary hearth furnace 4 is used for the oxidizing roasting and reduction roasting of dry bulb group, obtains metallized pellet.
Molten point of stove 5 of combustion gas includes feeding mouth and discharging opening.Combustion gas melts point stove 5 for the thawing separation of metallized pellet, obtains
Obtain molten iron.
As depicted in figs. 1 and 2, rotary hearth furnace 4 includes feeding mouth 401, discharging opening 402, exhanst gas outlet 403, barricade 404 and goes back
Former agent entrance 407.
Barricade 404 is located in the body of heater of rotary hearth furnace 4, the annular space in body of heater is divided into into oxidizing roasting area 405 and is gone back
Former roast area 406, rotary hearth furnace feeding mouth 401 is located at oxidizing roasting area 405, and rotary hearth furnace discharging opening 402 is located at reduction roasting area
406, exhanst gas outlet 403 is located at oxidizing roasting area 405, and reducing agent entrance 407 is located at reduction roasting area 406 away from discharge port end
Furnace roof.
Dry bulb group is collected in the flue gas that the desulfurization of oxidizing roasting area 405 aoxidizes generation by exhanst gas outlet 403, can be used to manufacture sulfur
Acid.
Dotted arrow in Fig. 1 and Fig. 2 represents the direction of motion of material in rotary hearth furnace.Rotary hearth furnace 4 furnace bottom rotarily drives
Material movement.In this utility model embodiment, troilite dry bulb group (material) enters oxidizing roasting area by rotary hearth furnace feeding mouth 401
405, reduction roasting area 406 is entered after oxidized roasting, the dry bulb after reduction roasting is rolled into a ball Jing rotary hearth furnaces discharging opening 402 and is discharged and turns bottom
Stove.
As shown in Fig. 2 reducing agent entrance 407 is located at furnace roof, it is easy to reducing agent to enter rotary hearth furnace 4.Reducing agent entrance 407 sets
Put in reduction roasting area 406 away from rotary hearth furnace discharge port end, have certain distance with barricade 404 so that dry bulb group enters reduction quilt
Can contact with reducing agent when burning area 406.
The discharging opening of atomizer mill 1 connects the feeding mouth of ball press 2, and the discharging opening of the ball press 2 connection feeding mouth of drying device 3 is dried
The discharging opening of device 3 connects the feeding mouth of rotary hearth furnace 4, molten point of feeding mouth of stove 5 of the discharging opening of rotary hearth furnace 4 connection combustion gas.
Specifically, the quantity of barricade is two in rotary hearth furnace 4.The radian of the annular region of oxidizing roasting area 405 be 150 °～
180°.Sector region radian between rotary hearth furnace feeding mouth 401 and rotary hearth furnace discharging opening 402 is 10 °～15 °.Wherein, a gear
Wall is arranged in the sector region between rotary hearth furnace feeding mouth 401 and rotary hearth furnace discharging opening 402.
As the distance of the furnace bottom upper surface of the preferred scheme of this utility model embodiment, the bottom of barricade 404 and rotary hearth furnace
For 10～20cm.The bottom of barricade 404 to the distance of the furnace bottom upper surface of rotary hearth furnace should ensure passing through for material, protect again
Card oxidizing roasting area's atmosphere and reduction roasting area atmosphere are not interfered with each other.
On the other hand, as shown in figure 3, this utility model embodiment provides the side that a kind of utilization said system processes troilite
Method, comprises the steps：
A, by troilite fine grinding pressure ball, dry bulb group is obtained after being dried；
B, dry bulb group is sent into into the rotary hearth furnace, first carries out oxidizing roasting desulfurization, after carry out reduction roasting, obtain gold
Category pellet, reducing agent enters rotary hearth furnace by the reducing agent entrance, will when dry bulb group enters the reduction roasting area
The dry bulb rolls into a ball one layer of reducing agent of uniform fold, and collecting the flue gas of oxidizing roasting area generation is used to prepare sulphuric acid；
C, by the metallized pellet with addition of quick lime enter melting down 0.5～1h after molten point of stove fusing of combustion gas obtain molten iron and
Slag.
Used as preferred scheme, the rotary hearth furnace oxidizing roasting area temperature is 800～1000 DEG C, and reduction roasting area temperature is
1200～1300 DEG C, the furnace bottom of the rotary hearth furnace rotates a circle the time for 2～5h.
Further, the troilite and carbide slag are finely ground to into the granular mass percentage ratio of granularity≤200 mesh in step A
More than 80%, the dry bulb granule footpath is 10～20mm.
Used as the preferred scheme of this utility model embodiment, the mass component of carbon is not less than 80% in the reducing agent, institute
Reducing agent granularity is stated for 2～5mm.
Specifically, the mass ratio of metallized pellet described in step C and quick lime is 1:0.05～0.1.
As preferred scheme, in oxidizing roasting oxygen is blasted, the oxygen volume for blasting for volume of fuel 10～
15%.
The system and method that this utility model embodiment is provided, troilite is prepared after pelletizing, and oxygen is completed in rotary hearth furnace
Change roasting and reduction roasting, system structure is simple, low cost；Reduction roasting area makes full use of dry bulb group of oxidizing roasting area sensible heat,
Reduce energy consumption；Troilite restores roasting Jing after desulfurization oxidation, and degree of metalization is high；Troilite, as raw material, is to expand iron mine
The utilization of resources of stone creates condition.
More specific description is carried out to this utility model below by specific embodiment, to be better understood from this practicality
New embodiment.
Embodiment 1
Certain troilite is milled to into the granular mass accounting 82.31% of granularity≤200 mesh, pressure ball (pelletizing particle diameter 10mm) is done
Entered by rotary hearth furnace feeding mouth after dry, oxidizing roasting area radian is 150 °, and 900 DEG C of temperature control blasts the 10% of volume of fuel
Oxygen, 1300 DEG C of reduction roasting area temperature control, furnace bottom rotates a circle the time for 5h, the dry bulb group entrance reduction after oxidizing roasting
During roast area, the reduction coal (mass component of C：82.03%, granularity 2mm) dry bulb group is paved with from reducing agent entrance, it is paved with reduction coal
Dry bulb group reduction roasting area be reduced into metallized pellet from rotary hearth furnace discharging opening discharge, by oxidizing roasting area fume extraction
For preparing sulphuric acid.The thermal state metal pellet that rotary hearth furnace is discharged is according to 1:0.05 enters molten point of stove of combustion gas with addition of quick lime melts
Melting down 0.5h obtains molten iron and slag after change.
Embodiment 2
Certain troilite is milled to into the granular mass accounting 83.55% of granularity≤200 mesh, pressure ball (pelletizing particle diameter 15mm) is done
Entered by rotary hearth furnace feeding mouth after dry, oxidizing roasting area radian is 160 °, and 800 DEG C of temperature control blasts the 12% of volume of fuel
Oxygen, 1200 DEG C of reduction roasting area temperature control, furnace bottom rotates a circle the time for 3h, the dry bulb group entrance reduction after oxidizing roasting
During roast area, the reduction coal (mass component of C：80.26%, granularity 3mm) dry bulb group is paved with from reducing agent entrance, it is paved with reduction coal
Dry bulb group reduction roasting area be reduced into metallized pellet from rotary hearth furnace discharging opening discharge, by oxidizing roasting area fume extraction
For preparing sulphuric acid.The thermal state metal pellet that rotary hearth furnace is discharged is according to 1:0.01 enters molten point of stove of combustion gas with addition of quick lime melts
Melting down 1h obtains molten iron and slag after change.
Embodiment 3
Certain troilite is milled to into the granular mass accounting 81.25% of granularity≤200 mesh, pressure ball (pelletizing particle diameter 20mm) is done
Entered by rotary hearth furnace feeding mouth after dry, oxidizing roasting area radian is 170 °, and 1000 DEG C of temperature control blasts the 15% of volume of fuel
Oxygen, 1300 DEG C of reduction roasting area temperature control, furnace bottom rotates a circle the time for 2h, the dry bulb group entrance reduction after oxidizing roasting
During roast area, the reduction coal (mass component of C：83.26%, granularity 5mm) dry bulb group is paved with from reducing agent entrance, it is paved with reduction coal
Dry bulb group reduction roasting area be reduced into metallized pellet from rotary hearth furnace discharging opening discharge, by oxidizing roasting area fume extraction
For preparing sulphuric acid.The thermal state metal pellet that rotary hearth furnace is discharged is according to 1:0.07 enters molten point of stove of combustion gas with addition of quick lime melts
Melting down 0.8h obtains molten iron and slag after change.
It should be noted that each embodiment above by reference to described by accompanying drawing is only to illustrate this utility model rather than limit
Scope of the present utility model is made, it will be understood by those within the art that, without departing from spirit of the present utility model and model
The modification carried out to this utility model on the premise of enclosing or equivalent, all should cover within the scope of this utility model.
Additionally, unless the context outside indication, the word for occurring in the singular includes plural form, and vice versa.In addition, removing non-specifically
Explanation, then any embodiment all or part of can with reference to any other embodiment all or part of using.
Claims (5)
1. the system that point stove processes troilite, including molten point of stove of rotary hearth furnace and combustion gas are melted in a kind of combustion gas,
The rotary hearth furnace includes feeding mouth, discharging opening, exhanst gas outlet and barricade,
The barricade is located in the body of heater of the rotary hearth furnace, the annular space in the body of heater is divided into into oxidizing roasting area and is gone back
Former roast area, the rotary hearth furnace feeding mouth is located at the oxidizing roasting area, and the rotary hearth furnace discharging opening is located at the reduction roasting
Area, the exhanst gas outlet is located at the oxidizing roasting area；
Molten point of stove of the combustion gas includes feeding mouth and discharging opening；
The rotary hearth furnace discharging opening connects molten point of stove feeding mouth of the combustion gas.
2. system according to claim 1, it is characterised in that the system further includes atomizer mill, ball press and dry
Dry device,
The atomizer mill includes discharging opening；
The ball press includes feeding mouth and discharging opening；
The drying device includes feeding mouth and discharging opening；
The atomizer mill discharging opening connects the ball press feeding mouth, and the ball press discharging opening connects the drying device pan feeding
Mouthful, the drying device discharging opening connects the rotary hearth furnace feeding mouth.
3. system according to claim 1, it is characterised in that the rotary hearth furnace further includes reducing agent entrance, described
Reducing agent entrance is located at furnace roof of the reduction roasting area away from discharge port end.
4. system according to claim 1, it is characterised in that the radian of oxidizing roasting area annular region is 150 °～
180 °, the sector region radian between the rotary hearth furnace feeding mouth and rotary hearth furnace discharging opening is 10 °～15 °.
5. system according to claim 1, it is characterised in that the furnace bottom upper surface of the barricade bottom and the rotary hearth furnace
Distance be 10～20cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621267228.8U CN206143238U (en) | 2016-11-22 | 2016-11-22 | System for gas melting furnace handles troilite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621267228.8U CN206143238U (en) | 2016-11-22 | 2016-11-22 | System for gas melting furnace handles troilite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206143238U true CN206143238U (en) | 2017-05-03 |
Family
ID=58626870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621267228.8U Expired - Fee Related CN206143238U (en) | 2016-11-22 | 2016-11-22 | System for gas melting furnace handles troilite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206143238U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106350630A (en) * | 2016-11-22 | 2017-01-25 | 江苏省冶金设计院有限公司 | System and method for processing iron pyrite by fuel gas melting separation furnace |
-
2016
- 2016-11-22 CN CN201621267228.8U patent/CN206143238U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106350630A (en) * | 2016-11-22 | 2017-01-25 | 江苏省冶金设计院有限公司 | System and method for processing iron pyrite by fuel gas melting separation furnace |
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Effective date of registration: 20190102 Granted publication date: 20170503 |
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