CN106435162A - System and method for preparing desulfurization gypsum through ferri sulphur - Google Patents
System and method for preparing desulfurization gypsum through ferri sulphur Download PDFInfo
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- CN106435162A CN106435162A CN201611041034.0A CN201611041034A CN106435162A CN 106435162 A CN106435162 A CN 106435162A CN 201611041034 A CN201611041034 A CN 201611041034A CN 106435162 A CN106435162 A CN 106435162A
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- rotary hearth
- hearth furnace
- roasting area
- discharging opening
- furnace
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0046—Making spongy iron or liquid steel, by direct processes making metallised agglomerates or iron oxide
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/14—Multi-stage processes processes carried out in different vessels or furnaces
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a system and method for preparing desulfurization gypsum through ferri sulphur. The system comprises a rotary hearth furnace, a smoke drying catalytic system and a desulfurization gypsum preparing device. The rotary hearth furnace comprises a feed inlet, a discharge outlet, a smoke outlet and stopping walls. The stopping walls are located in a furnace body of the rotary hearth furnace. An annular space in the furnace body is partitioned into am oxidizing roasting area and a reducing roasting area through the stopping walls. The feed inlet of the rotary hearth furnace is located in the oxidizing roasting area. The discharge outlet of the rotary hearth furnace is located in the reducing roasting area. The smoke outlet of the rotary hearth furnace is located in the oxidizing roasting area. The smoke drying catalytic system comprises a smoke inlet and a smoke outlet. The desulfurization gypsum preparing device comprises a smoke inlet. According to the system and method for preparing the desulfurization gypsum through the ferri sulphur, the ferri sulphur is pelletized and subjected to oxidizing roasting and reducing roasting in the rotary hearth furnace, and then metalized pellets are obtained; and generated smoke is collected for preparing the desulfurization gypsum, the energy consumption is small, and no secondary solid waste is generated in the whole process.
Description
Technical field
The invention belongs to technical field of smelting, the system and method that more particularly, to a kind of troilite prepares desulfurated plaster.
Background technology
Pyrite cinder (also known as sulfate slag) can be produced, it is the mainly solid of chemical industry production in the production process of sulphuric acid
One of body garbage.The annual a large amount of pyrite cinders producing of China adopt landfill to process mostly, not only occupy a large amount of soils,
And severe contamination is caused to environment.Meanwhile, 20%～60% ferrum that pyrite cinder contains is not recycled profit yet
With.
Recently as the fast development of steel industry, China increases to the mining inetesity of iron mineral resource, resource grade
Iron ore deposit high, that sorting is good just gradually decreases, and mineral resources can be supplied to ability continuous decrease.Active development difficulty utilizes iron mine
Stone resource, can effectively expand China's available iron ore resource amount, reduce external dependence degree, ensure the peace of ferrolite supply
Entirely.
Directly utilize the system of producing iron refined powder from troilite, equipment is complicated, high cost can produce dusty gass simultaneously, increases
Plus treatment cost.A kind of method of existing use producing iron refined powder from troilite and its device, are in production sulfuric acid apparatus
On the basis of, increase raw material mixing system, using fluidized bed furnace discharge slag, in calculate ratio mix troilite in, and with other
Composition is mixed into stove roasting, and product is sulphuric acid, also can obtain Iron concentrate.The Iron concentrate degree of metalization that this technique obtains is low.
Content of the invention
The invention is intended to proposing the system and method that a kind of troilite prepares desulfurated plaster, rotary hearth furnace is realized troilite
Oxidizing roasting and reduction roasting, reduction effect is good, and degree of metalization is high, obtains metallized pellet, collects the cigarette that rotary hearth furnace produces
Gas, for manufacturing desulfurated plaster.
The oxidizing roasting of the present invention is carried out in oxidizing atmosphere, so that some compositions in troilite is occurred by roasting
Oxidation reaction, generates new oxide.Troilite (FeS2) in oxidizing atmosphere (or being passed through large quantity of air) during long-time roasting
With O2React generation magnetic iron ore：3FeS2+8O2→Fe3O4+6SO2, SO in oxidizing roasting area flue gas2Generate SO through catalysis3：
2SO2+O2→2SO3, SO3With Ca (OH) in carbide slag slurries2Reaction generates desulfurated plaster：Ca(OH)2+SO3→CaSO4+H2O, magnetic
Iron mine is easier to be reduced.
An object of the present invention is the system providing a kind of troilite to prepare desulfurated plaster, does including rotary hearth furnace, flue gas
Dry catalysis system and desulfurated plaster preparation facilitiess,
Described rotary hearth furnace includes feeding mouth, discharging opening, exhanst gas outlet and barricade, and described barricade is located at the stove of described rotary hearth furnace
In vivo, the annular space in described body of heater is divided into oxidizing roasting area and reduction roasting area, described rotary hearth furnace feeding mouth is located at
Described oxidizing roasting area, described rotary hearth furnace discharging opening is located at described reduction roasting area, and described rotary hearth furnace exhanst gas outlet is located at described
Oxidizing roasting area；
Described flue gas drying catalysis system includes smoke inlet and exhanst gas outlet；
Described desulfurated plaster preparation facilitiess include smoke inlet；
Described rotary hearth furnace exhanst gas outlet connects described flue gas drying catalysis system smoke inlet, described flue gas drying catalysis system
System exhanst gas outlet connects described desulfurated plaster preparation facilitiess smoke inlet.
Rotary hearth furnace is used for oxidizing roasting and the reduction roasting of troilite.Flue gas drying catalysis system is used for what rotary hearth furnace produced
The drying of flue gas and catalysis.Desulfurated plaster preparation facilitiess are used for preparing desulfurated plaster using flue gas.
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, enters reduction roasting area, the metallized pellet after reduction roasting is through rotary hearth furnace after oxidized roasting
Discharging opening discharges rotary hearth furnace.Exhanst gas outlet is used for collecting the flue gas of rotary hearth furnace generation.
In the present invention, described system further includes：Atomizer mill, ball press and drying device,
Described atomizer mill includes discharging opening；Described ball press includes feeding mouth and discharging opening；Described drying device include into
Material mouth and discharging opening；
Described atomizer mill discharging opening connects described ball press feeding mouth, and described ball press discharging opening connects described drying device
Feeding mouth, described drying device discharging opening connects described rotary hearth furnace feeding mouth.
Atomizer mill is used for troilite is 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, prepares for follow-up roasting.
As preferred scheme, described rotary hearth furnace further includes reducing agent entrance, and described reducing agent entrance is located at described
Reduction roasting area is away from the furnace roof of discharge port end.Reducing agent enters rotary hearth furnace by described reducing agent entrance, and in dry bulb, group enters also
During former roast area, described dry bulb is rolled into a ball one layer of reducing agent of uniform fold.
Specifically, the radian of described oxidizing roasting area annular space be 150 °～180 °, described rotary hearth furnace feeding mouth with turn
Sector region radian between the furnace discharge mouth of bottom is 10 °～15 °.
Further, described barricade bottom and the distance of the furnace bottom of described rotary hearth furnace are 10～20cm.Barricade bottom to turn
The distance of the furnace bottom upper surface of bottom stove should ensure passing through of material, ensures oxidizing roasting area atmosphere and reduction roasting again
Area's atmosphere does not interfere with each other.
It is a further object of the present invention to provide a kind of method preparing desulfurated plaster using said system, walk including following
Suddenly：
A, by troilite fine grinding pressure ball, obtain dry bulb group after being dried；
B, described dry bulb is rolled into a ball and sends into described rotary hearth furnace, first carry out the solid sulfur of oxidizing roasting, after carry out reduction roasting, obtain gold
Belong to pellet, reducing agent enters rotary hearth furnace by described reducing agent entrance, will when described dry bulb is rolled into a ball and entered described reduction roasting area
Described dry bulb rolls into a ball one layer of reducing agent of uniform fold, collects the flue gas that oxidizing roasting area produces；
C, described desulfurated plaster preparation facilitiess fill carbide slag slurries, are passed through described carbide by after described flue gas drying, catalysis
Slurry, obtains desulfurated plaster.
As preferred embodiment, described rotary hearth furnace oxidizing roasting area temperature is 800～1000 DEG C, reduction roasting area temperature
Spend for 1200～1300 DEG C, the furnace bottom of described rotary hearth furnace rotates a circle the time for 2～4h.
In the present invention, the mass percent that the troilite that in step A, described troilite is finely ground to granularity≤200 mesh accounts for exists
More than 80%, described dry bulb granule footpath is 10～20mm.
As preferred embodiment, in described reducing agent, the mass component of carbon is not less than 80%, described reducing agent granularity
For 2～5mm.
Further, blast oxygen in oxidizing roasting, the oxygen volume blasting is the 10～15% of volume of fuel.
The system and method that the troilite that the present invention provides prepares desulfurated plaster, troilite are prepared after pelletizing, are turning bottom
Stove internal oxidition roasting is integrally completed with reduction roasting；Reduction roasting area makes full use of dry bulb group of oxidizing roasting area sensible heat, reduces
Energy consumption；Troilite restores roasting after desulfurization oxidation, and degree of metalization is high；The flue gas that rotary hearth furnace is produced is used for preparing desulfurization stone
Cream, whole process no secondary solid garbage.
Brief description
Fig. 1 is the system schematic that troilite of the present invention prepares desulfurated plaster；
Fig. 2 is the reducing agent entrance partial schematic diagram of rotary hearth furnace of the present invention；
Fig. 3 is the method schematic diagram of the system process troilite of the present invention.
In figure：
1- atomizer mill；2- ball press；3- drying device；4- rotary hearth furnace；
401- rotary hearth furnace feeding mouth；402- rotary hearth furnace discharging opening；403- exhanst gas outlet；404- barricade；405- oxidizing roasting
Area；406- reduction roasting area；407- reducing agent entrance；
5- flue gas drying catalysis system；6- desulfurated plaster preparation facilitiess.
Specific embodiment
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in more details, so that energy
The advantage enough more fully understanding the solution of the present invention and its various aspects.However, specific embodiments described below and enforcement
Example is only descriptive purpose, rather than limitation of the present invention.
As shown in Figure 1, on the one hand, the embodiment of the present invention provides a kind of troilite to prepare the system of desulfurated plaster, including thin
Grinding machine 1, ball press 2, drying device 3, rotary hearth furnace 4 and desulfurated plaster preparation facilitiess 6.
Atomizer mill 1 includes feeding mouth and discharging opening.Atomizer mill 1 is used for troilite is 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 thermally equivalent in rotary hearth furnace.It is good that suitable pellet size makes pelletizing conduct heat, and reaches good reduction effect.
Drying device 3 includes feeding mouth and discharging opening.Drying device 3 is used for the drying of pelletizing, prepares for follow-up roasting.
Rotary hearth furnace 4 is used for oxidizing roasting and the reduction roasting of dry bulb group, obtains metallized pellet.
Flue gas drying catalysis system 5 includes smoke inlet and exhanst gas outlet.Flue gas drying catalysis system 5 is used for rotary hearth furnace oxygen
Change the drying of flue gas and the catalysis that roast area produces.
Desulfurated plaster preparation facilitiess 6 include smoke inlet and discharging opening.Desulfurated plaster preparation facilitiess 6 fill carbide slag slurries,
Flue gas after catalysis and carbide slag slurries react generation desulfurated plaster.
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 dose of 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 oxidizing roasting area 405 and goes 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.
The flue gas that dry bulb group produces in oxidizing roasting area 405 desulfurization oxidation is collected by exhanst gas outlet 403, can be used for manufacture de-
Sulfur Gypsum Fibrosum.
Dotted arrow in Fig. 1 and Fig. 2 represents the direction of motion of material in rotary hearth furnace.The rotarily driving of rotary hearth furnace 4 furnace bottom
Material movement.In the embodiment of the present invention, troilite dry bulb group (material) enters oxidizing roasting area 405 by rotary hearth furnace feeding mouth 401,
Reduction roasting area 406 is entered, the dry bulb group after reduction roasting discharges rotary hearth furnace through rotary hearth furnace discharging opening 402 after oxidized roasting.
As shown in Fig. 2 reducing agent entrance 407 is located at furnace roof, it is easy to reducing agent and enters 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.
Atomizer mill 1 discharging opening connects ball press 2 feeding mouth, and ball press 2 discharging opening connects drying device 3 feeding mouth, is dried
Device 3 discharging opening connects rotary hearth furnace 4 feeding mouth, and rotary hearth furnace 4 exhanst gas outlet connects flue gas drying catalysis system 5 smoke inlet, cigarette
The dry catalysis system of air dry 5 exhanst gas outlet connects desulfurated plaster preparation facilitiess 6 smoke inlet.
Specifically, the radian of described oxidizing roasting area annular space be 150 °～180 °, described rotary hearth furnace feeding mouth with turn
Sector region radian between the furnace discharge mouth of bottom is 10 °～15 °.Wherein, a dams setting in rotary hearth furnace feeding mouth 401 and turns
In sector region between bottom furnace discharge mouth 402.
As the preferred scheme of the embodiment of the present invention, barricade 404 bottom is 10 with the distance of the furnace bottom upper surface of rotary hearth furnace
～20cm.The distance of barricade 404 bottom to the furnace bottom upper surface of rotary hearth furnace should ensure passing through of material, ensures oxygen again
Change roast area atmosphere and reduction roasting area atmosphere does not interfere with each other.
On the other hand, as shown in figure 3, the embodiment of the present invention provides a kind of side preparing desulfurated plaster using said system
Method, comprises the steps：
1st, troilite is finely ground to the granular mass percentage ratio of granularity≤200 mesh more than 80%, pressure ball, obtain after being dried
Dry bulb group, dry bulb granule footpath is 10～20mm；
2nd, dry bulb is rolled into a ball and sends into rotary hearth furnace, first carry out oxidizing roasting desulfurization, after carry out reduction roasting, obtain metallization ball
Group, oxidizing roasting area temperature is 800～1000 DEG C, and blasts the oxygen of volume of fuel 10～15%, and reduction roasting area temperature is
1200～1300 DEG C, the furnace bottom of rotary hearth furnace rotates a circle the time for 2～4h, and reducing agent enters rotary hearth furnace by reducing agent entrance,
Dry bulb group enters rolls into a ball uniform fold one floor reducing agent by dry bulb during reduction roasting area, collects the flue gas that oxidizing roasting area produces；
3rd, desulfurated plaster preparation facilitiess fill carbide slag slurries, are passed through after flue gas drying, catalysis in carbide slag slurries, obtain de-
Sulfur Gypsum Fibrosum.
As preferred embodiment, in described reducing agent, the mass component of carbon is not less than 80%, described reducing agent granularity
For 2～5mm.
System and method provided in an embodiment of the present invention, troilite is prepared after pelletizing, completes oxidation roasting in rotary hearth furnace
Burn and reduction roasting；Reduction roasting area makes full use of dry bulb group of oxidizing roasting area sensible heat, reduces energy consumption；Troilite is through rotary hearth furnace
After roasting, degree of metalization is high；Utilize troilite and carbide slag, the flue gas that rotary hearth furnace is produced is used for preparing desulfurated plaster simultaneously,
Whole process no secondary solid garbage.
Embodiment 1
Certain troilite is milled to the granular mass accounting 83.78% of granularity≤200 mesh, pressure ball (pelletizing particle diameter 15mm), does
Enter from rotary hearth furnace feeding mouth after dry, rotary hearth furnace oxidizing roasting area radian is 170 °, 800 DEG C of temperature control blasts volume of fuel
12% oxygen, 1200 DEG C of reduction roasting area temperature control, furnace bottom rotate a circle the time be 3h, the dry bulb group after oxidizing roasting enters
When entering reduction roasting area, the reduction coal (mass component of C：81.35%, granularity 3mm) it is paved with dry bulb group from reducing agent entrance, it is paved with
The dry bulb group of reduction coal is reduced into metallized pellet in reduction roasting area and discharges from rotary hearth furnace discharging opening.Extract oxidizing roasting area
It is passed through carbide slag slurries after flue gas drying, catalysis and prepare desulfurated plaster.
Embodiment 2
Certain troilite is milled to the granular mass accounting 81.21% of granularity≤200 mesh, pressure ball (pelletizing particle diameter 10mm), does
Enter from rotary hearth furnace feeding mouth after dry, rotary hearth furnace oxidizing roasting area radian is 150 °, 900 DEG C of temperature control blasts volume of fuel
10% oxygen, 1300 DEG C of reduction roasting area temperature control, furnace bottom rotate a circle the time be 4h, the dry bulb group after oxidizing roasting enters
When entering reduction roasting area, the reduction coal (mass component of C：82.03%, granularity 2mm) it is paved with dry bulb group from reducing agent entrance, it is paved with
The dry bulb group of reduction coal is reduced into metallized pellet in reduction roasting area and discharges from rotary hearth furnace discharging opening.Extract oxidizing roasting area
It is passed through carbide slag slurries after flue gas drying, catalysis and prepare desulfurated plaster.
Embodiment 3
Certain troilite is milled to the granular mass accounting 81.55% of granularity≤200 mesh, pressure ball (pelletizing particle diameter 20mm), does
Enter from rotary hearth furnace feeding mouth after dry, rotary hearth furnace oxidizing roasting area radian is 170 °, 1000 DEG C of temperature control blasts volume of fuel
15% oxygen, 1300 DEG C of reduction roasting area temperature control, furnace bottom rotate a circle the time be 2h, the dry bulb group after oxidizing roasting enters
When entering reduction roasting area, the semi-coke (mass component of C：83.26%, granularity 3mm) it is paved with dry bulb group from reducing agent entrance, it is paved with orchid
The dry bulb group of charcoal is reduced into metallized pellet in reduction roasting area and discharges from rotary hearth furnace discharging opening.Extract oxidizing roasting area flue gas
It is passed through carbide slag slurries after drying, catalysis and prepare desulfurated plaster.
It should be noted that each embodiment above by reference to described by accompanying drawing only limits this in order to illustrate rather than
The scope of invention, it will be understood by those within the art that, right under the premise without departing from the spirit and scope of the present invention
Modification or equivalent that the present invention is carried out, all should cover within the scope of the present invention.Additionally, indication unless the context
Outward, the word occurring in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of can use in conjunction with all or part of of any other embodiment.
Claims (9)
1. a kind of troilite prepares the system of desulfurated plaster, including the preparation of rotary hearth furnace, flue gas drying catalysis system and desulfurated plaster
Device,
Described rotary hearth furnace includes feeding mouth, discharging opening, exhanst gas outlet and barricade,
Described barricade is located in the body of heater of described rotary hearth furnace, the annular space in described body of heater is divided into oxidizing roasting area and goes back
Former roast area, described rotary hearth furnace feeding mouth is located at described oxidizing roasting area, and described rotary hearth furnace discharging opening is located at described reduction roasting
Area, described rotary hearth furnace exhanst gas outlet is located at described oxidizing roasting area；
Described flue gas drying catalysis system includes smoke inlet and exhanst gas outlet；
Described desulfurated plaster preparation facilitiess include smoke inlet；
Described rotary hearth furnace exhanst gas outlet connects described flue gas drying catalysis system smoke inlet, described flue gas drying catalysis system cigarette
Gas outlet connects described desulfurated plaster preparation facilitiess smoke inlet.
2. system according to claim 1 is it is characterised in that described system further includes：Atomizer mill, ball press and dry
Dry device,
Described atomizer mill includes discharging opening；
Described ball press includes feeding mouth and discharging opening；
Described drying device includes feeding mouth and discharging opening；
Described atomizer mill discharging opening connects described ball press feeding mouth, and described ball press discharging opening connects described drying device pan feeding
Mouthful, described drying device discharging opening connects described rotary hearth furnace feeding mouth.
3. system according to claim 1 is it is characterised in that described rotary hearth furnace further includes reducing agent entrance, described
Reducing agent entrance is located at the furnace roof away from discharge port end for the described reduction roasting area.
4. system according to claim 1 it is characterised in that described oxidizing roasting area annular space radian be 150 °～
180 °, the sector region radian between described rotary hearth furnace feeding mouth and rotary hearth furnace discharging opening is 10 °～15 °.
5. system according to claim 1 is it is characterised in that the distance of the furnace bottom of described barricade bottom and described rotary hearth furnace
For 10～20cm.
6. a kind of using the arbitrary described system of claim 1～5 prepare desulfurated plaster method it is characterised in that include step：
A, by troilite fine grinding pressure ball, obtain dry bulb group after being dried；
B, described dry bulb is rolled into a ball and sends into described rotary hearth furnace, first carry out the solid sulfur of oxidizing roasting, after carry out reduction roasting, obtain metallization
Pelletizing, reducing agent enters rotary hearth furnace by described reducing agent entrance, will be described when described dry bulb is rolled into a ball and entered described reduction roasting area
One layer of reducing agent of dry bulb group's uniform fold, collects the flue gas that oxidizing roasting area produces；
C, described desulfurated plaster preparation facilitiess fill carbide slag slurries, are passed through described carbide slag slurries by after described flue gas drying, catalysis,
Obtain desulfurated plaster.
7. method according to claim 6 is it is characterised in that described rotary hearth furnace oxidizing roasting area temperature is 800～1000
DEG C, reduction roasting area temperature is 1200～1300 DEG C, and the furnace bottom of described rotary hearth furnace rotates a circle the time for 2～4h.
8. method according to claim 6 is it is characterised in that be finely ground to granularity≤200 mesh by described troilite in step A
The mass percent that accounts for of troilite more than 80%, described dry bulb granule footpath is 10～20mm.
9. method according to claim 6 it is characterised in that in described reducing agent the mass component of carbon be not less than 80%,
Described reducing agent granularity is 2～5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611041034.0A CN106435162A (en) | 2016-11-22 | 2016-11-22 | System and method for preparing desulfurization gypsum through ferri sulphur |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611041034.0A CN106435162A (en) | 2016-11-22 | 2016-11-22 | System and method for preparing desulfurization gypsum through ferri sulphur |
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| Publication Number | Publication Date |
|---|---|
| CN106435162A true CN106435162A (en) | 2017-02-22 |
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ID=58218046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611041034.0A Pending CN106435162A (en) | 2016-11-22 | 2016-11-22 | System and method for preparing desulfurization gypsum through ferri sulphur |
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| CN (1) | CN106435162A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108557779A (en) * | 2018-07-03 | 2018-09-21 | 贵州大学 | A kind of method of ardealite and flyash relieving haperacidity coproduction mullite firebrick |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000109937A (en) * | 1998-09-30 | 2000-04-18 | Daido Steel Co Ltd | Reduced pellet |
| CN101215113A (en) * | 2007-12-27 | 2008-07-09 | 袁运法 | Method for producing cement retarder by carbide slag desulfurization |
| CN105671328A (en) * | 2016-03-25 | 2016-06-15 | 江苏省冶金设计院有限公司 | Rotary hearth furnace and method for treating lead and zinc smelting slag |
| CN206256117U (en) * | 2016-11-22 | 2017-06-16 | 江苏省冶金设计院有限公司 | The system that a kind of troilite prepares desulfurated plaster |
-
2016
- 2016-11-22 CN CN201611041034.0A patent/CN106435162A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000109937A (en) * | 1998-09-30 | 2000-04-18 | Daido Steel Co Ltd | Reduced pellet |
| CN101215113A (en) * | 2007-12-27 | 2008-07-09 | 袁运法 | Method for producing cement retarder by carbide slag desulfurization |
| CN105671328A (en) * | 2016-03-25 | 2016-06-15 | 江苏省冶金设计院有限公司 | Rotary hearth furnace and method for treating lead and zinc smelting slag |
| CN206256117U (en) * | 2016-11-22 | 2017-06-16 | 江苏省冶金设计院有限公司 | The system that a kind of troilite prepares desulfurated plaster |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108557779A (en) * | 2018-07-03 | 2018-09-21 | 贵州大学 | A kind of method of ardealite and flyash relieving haperacidity coproduction mullite firebrick |
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