CN107663588A - A kind of method of melting continuously carbide slag - Google Patents
A kind of method of melting continuously carbide slag Download PDFInfo
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- CN107663588A CN107663588A CN201710930294.1A CN201710930294A CN107663588A CN 107663588 A CN107663588 A CN 107663588A CN 201710930294 A CN201710930294 A CN 201710930294A CN 107663588 A CN107663588 A CN 107663588A
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- slag
- carbide slag
- electric furnace
- carbide
- melting continuously
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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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/001—Dry processes
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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
- C22B34/00—Obtaining refractory metals
- C22B34/10—Obtaining titanium, zirconium or hafnium
- C22B34/12—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08
- C22B34/1218—Obtaining titanium or titanium compounds from ores or scrap by metallurgical processing; preparation of titanium compounds from other titanium compounds see C01G23/00 - C01G23/08 obtaining titanium or titanium compounds from ores or scrap by dry processes
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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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/04—Working-up slag
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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
- Y02P10/20—Recycling
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Abstract
The invention belongs to field of metallurgy, and in particular to a kind of method of melting continuously carbide slag.The technical problems to be solved by the invention be to provide it is a kind of can melting continuously carbide slag method, this method be divided into heating and reduction phase, first by Ti-containing slag heat up completely melting, be then added in smelting furnace and reduced, reduction terminate after produce carbide slag.The technique avoids carbonization resistant material of electric furnace extremely cold very hot, ensure that the long service life of carbonization resistant material of electric furnace, and can realize closed, continuous, the efficient smelting of large-scale carbonization electric furnace.
Description
Technical field
The invention belongs to field of metallurgy, and in particular to a kind of method of melting continuously carbide slag.It is related specifically to blast furnace slag
A kind of preparation method of carbide slag during comprehensive utilization.
Background technology
Climb western titanium resource to enrich, through traditional blast furnace ironmaking-converter steelmaking process, most of titanium is entered in blast furnace slag, high
TiO in clinker2Content is 20%~26%, is founded the factory so far from steel is climbed, has stored up more than 6,500 ten thousand tons of blast furnace slag.For blast furnace
Slag, domestic many research institutions once carried out it is a variety of propose the research of titanium technology path, for example produce silicon titanium composite alloy, production ore deposit
Slag microcrystalline glass etc., but disposal ability is limited, it is impossible to fundamentally solve the problem of complex utilization of titanium-containing blast furnace slag.At present, it is high
" high temperature cabonization-low temperature chlorination produces TiCl to titanium blast furnace slag4" process route be most industrialization prospect technology path, work
Skill be divided into high-temperature selective carbonization, three key steps of cryogenic selective chlorination and the utilization of chloride residue, have flow it is short, place
The advantages that reason amount is big, titanium resource comprehensive utilization ratio is high.Wherein, high-temperature selective carbonization technique is by the titanium dioxide in Ti-containing slag
Titanium 80~95% is converted into TiC, while other components such as MgO, Al in slag2O3、SiO2, CaO etc. do not reacted with reducing agent then, with
This obtains a kind of special carbide slag containing TiC.Wherein, cryogenic selective chloridization process by valuable component TiC in carbide slag with
Cl2Preferential reaction, it is converted into TiCl4, it is used to produce titanium dioxide or Titanium after purified removal of impurities, chlorination process is in fluidized bed furnace
Interior progress, chlorine utilization is high, and in no fused salt chlorimation industry the shortcomings of a large amount of residue contaminations, technique is green.
Patent CN203498453U provides a kind of hot charging blast furnace slag carbonization electric furnace, has water cooling rotation bell, tilting furnace
The structures such as body, it is a kind of special furnace type structure, having the advantages that can be with hot charging clinker, conveniently slags tap.But the body of heater that fascinates etc. is tied
Structure designs the maximization for being unfavorable for equipment, and electric furnace form limits and production process interval is carried out.
The invention provides a kind of method of melting continuously carbide slag, this method can realize the close of large-scale carbonization electric furnace
Close, continuously, efficiently smelt, avoid the extremely cold i.e. enthusiasm condition of resistant material of electric furnace that is carbonized, ensure that the long service life of carbonization resistant material of electric furnace.
The content of the invention
For existing carbide slag can not continuously, largely smelt the defects of, the invention provides a kind of melting continuously carbide slag
Method.This method comprises the following steps：
Step A, Ti-containing slag is added in heating furnace and is warming up to 1550~1650 DEG C；
Step B, carbonaceous reducing agent and step A slags are added in carbonization electric furnace and reduced；Wherein, heating furnace and carbonization
Electric furnace uses pipeline communication.
Specifically, in the method and step A of above-mentioned melting continuously carbide slag, the Ti-containing slag is to contain TiO210~
90wt% clinker.It is described be warming up to 1550~1650 DEG C and continue into slag titanium dioxide be converted into the conversion ratio of titanium carbide and be
5~65%, then add into carbonization electric furnace.
Specifically, in the method and step B of above-mentioned melting continuously carbide slag, the carbonaceous reducing agent is nut coke, coke powder, thin
At least one of coal, anthracite, bituminous coal or lignite.
Further, in the method and step B of above-mentioned melting continuously carbide slag, the reduction temperature is 1600~1750 DEG C,
Reduction reaction carry out into slag titanium dioxide be converted into titanium carbide conversion ratio be 80~95%.
Specifically, in the method and step A of above-mentioned melting continuously carbide slag, the number of the heating furnace is n, and n is >=1.
Specifically, in the method and step A of above-mentioned melting continuously carbide slag, the heating uses burning carbonaceous reducing agent or day
Right air lift supplies institute's calorific requirement.
Specifically, in the method for above-mentioned melting continuously carbide slag, chute that slag obtained by step A passes through external heating muff
Flow into carbonization electric furnace.
The inventive method makes carbonization electric furnace closed by the way of pipeline communication, realizes carbonization electric furnace melting continuously, keeps away
It is extremely cold very hot to exempt from resistance to material, extends electric furnace service life；The CO concentration in electric furnace flue gas that is carbonized is stable, and it is high to recycle value；Can be with
Realize closed, continuous, the efficient smelting of large-scale carbonization electric furnace.The present invention is a kind of method of melting continuously carbide slag, the method
The advantages of be embodied in the following aspects：Molten slag is used as raw material, clinker charging temperature is 1250~1400 DEG C, can
The effective physical thermal for utilizing blast furnace slag；Using combustion heatings such as natural gas, carbon dusts in heating furnace, further save and smelt electricity
Consumption.
Brief description of the drawings
Fig. 1 present invention process equipment connection diagrams
Embodiment
This area, which routinely smelts Ti-containing slag, to be smelted using 20t or so electric furnace, and such electric furnace yield is small, enters
Material mouth unsealing, the air of entrance easily have an impact to electrode, shorten electrode life, and conventional treatment mode is tears stove open, again
New stove is built to be smelted.The defects of small yield, the discontinuous, cost that wastes raw material, human cost etc. be present in such usual manner.
As small yield stove directly is changed into big yield stove, it need to expand again after feeding, expand electrode, expansion charging aperture will enter substantial amounts of
Air, so as to influence electrode life；If the problems such as difficult feed be present again after not expanding charging.
For drawbacks described above, the invention provides a kind of method of melting continuously carbide slag.This method is divided into step A and step
In rapid two stages of B, the first stage, (such as volume is 30~55m to use small volume3) heating furnace raw material is heated up, make
Raw material melts completely, improves mobility, so as to be easy to be added in carbonization electric furnace；Part TiO in slag during heating2It is reduced to
TiC；Second stage, slag obtained by carbonaceous reducing agent and first stage is added into volume, and larger (such as volume is 120~350m3)
Drastic reduction is carried out in carbonization electric furnace, after reduction reaction terminates, that is, obtains qualified carbide slag；Wherein, heating furnace and carbonization electric furnace
Connected using pipeline, it is achieved thereby that carbonization electric furnace is closed.
Further, multiple heating furnaces can be set around carbonization electric furnace according to the dress quantity of slag of carbonization electric furnace.Such as 1~4
It is individual.
Further, the heating furnace provides heat by burning carbonaceous reducing agent or natural gas, controls the slag temperature to be
1550~1650 DEG C reach the purpose for improving mobility.A period of time can be kept at such a temperature, such as make titanium dioxide in slag
The conversion ratio for being converted into TiC is 5~65%.The carbonaceous reducing agent is in nut coke, coke powder, lean coal, anthracite, bituminous coal or lignite
At least one.
Further, the carbonization electric furnace provides carburizing reagent institute calorific requirement by electrical heating, controls the slag temperature to be
1600~1750 DEG C are reduced, be restored to titanium dioxide in slag be converted into TiC conversion ratio be 80~95%.
Preferably, in order to ensure that the heat that slag is flowed into carbonization electric furnace from heating furnace loses less as much as possible, use
The chute of external heating muff flows into slag obtained by step A on step B carbonization electric furnace.
In the inventive method step A, the purpose to be heated up in heating furnace is phosphorus bearing slag is further melted, and improves clinker
Mobility.Part titanium dioxide be present with not being avoided that in the step temperature-rise period and be reduced to titanium carbide.
In order to save the energy, it is complete to enter secondary combustion chamber for reacting gas caused by heating furnace in the inventive method step A
Burning, high-temperature flue gas can heat waste heat boiler caused by burning, also can the cooling of water cooled sleeve pipe, gather dust after discharge；In step B
Caused flue gas recycles after cooling, dedusting during carbonization electric furnace smelting carbide slag.
Ti-containing slag interruption is added in heating furnace in the inventive method step A, cinder notch is opened after the completion of heating, slag passes through
The chute of external heating muff flows into carbonization electric furnace；The chute is chute commonly used in the art, i.e., outside is steel, and inside is built by laying bricks or stones
Resistance to material.The continuous power transmission of electric furnace that is carbonized in step B is smelted, and separated cinder notch is slagged tap, and it is residual all to go out net or part for carbide slag when slagging tap
Stay.In the inventive method, used carbonizing reduction agent to smelt the conventional reducing agent of carbide slag, as nut coke, coke powder, lean coal,
One or more in anthracite, bituminous coal, lignite etc..The dosage of carbonaceous reducing agent used is according to titanium dioxide in Ti-containing slag
Content reasonably adjusts, generally TiO in slag2Being completely converted into the theoretical reactions of TiC needs 1.3~2 times of carbon.
Embodiment 1
Implement this invention in certain factory, a carbonization electric furnace nominal capacity is 65t in operation area, and carbide furnace periphery is southern and northern
To two Heating Furnaces are set, heating furnace nominal capacity is 30t.Full Ti content is 13.60% in molten blast furnace slag, dioxy
It is 23.32% to change Ti content, transports to production operation area through slag ladle and carriage, is directly poured into after weight broken shell in heating furnace；Heating furnace
Using burning heated by natural gas clinker, heat time about 56min, heating end infrared radiation thermometer measures slag surface temperature and is
1582 DEG C, teams and groups' opening is slagged tap, and it is that 13.43%, TiC contents are 5.6% that sampling chemical analysis, which measures full Ti contents in slag, is melted
The conversion ratio that titanium dioxide is converted into TiC in slag is 33.36%.Melt cinder flows into carbonization electric furnace through chute, and carbonization electric furnace uses stone
Electrode ink power transmission heats, and it is 1600~1700 DEG C to control electric furnace interior reaction temperature, and reducing agent is finely-ground coke, and below coke powder 1mm is accounted for
Than more than 80%, being added by carbide furnace top charge door in electric furnace, coke powder is with 1.6 that dosage is chemical reaction theoretical requirement
Times；After continuing power transmission 1h50min, CO contents are gradually reduced in electric furnace flue gas, and carburizing reagent is slagged tap close to smelting endpoint, opening,
Obtain carbide slag.It is that 13.04%, TiC contents are 13.72% to measure full Ti contents in carbide slag, and titanium dioxide is converted into TiC's
Conversion ratio is 84.17%.During carbonization electric furnace power transmission is smelted, heating furnace continues hot charging slag, temperature-rise period next time, carbon
After the completion of change stove is slagged tap, melt cinder is blended into by heating furnace again immediately, continues power transmission and smelts.With this so that production process is continuously entered
OK, closed, continuous, the efficient smelting of large-scale carbonization electric furnace is realized.
Claims (8)
1. the method for melting continuously carbide slag, it is characterised in that：Comprise the following steps：
Step A, Ti-containing slag is added in heating furnace and is warming up to 1550~1650 DEG C；
Step B, carbonaceous reducing agent and step A slags are added in carbonization electric furnace and reduced, reduction produces carbide slag after terminating；
Wherein, heating furnace and carbonization electric furnace use pipeline communication.
2. the method for melting continuously carbide slag according to claim 1, it is characterised in that：In step A, the Ti-containing slag
To contain TiO210~90wt% clinker.
3. the method for melting continuously carbide slag according to claim 1 or 2, it is characterised in that：In step A, the heating
To 1550~1650 DEG C continue into slag titanium dioxide be converted into titanium carbide conversion ratio be 5~65%, then add to
It is carbonized in electric furnace.
4. the method for melting continuously carbide slag according to claim 1, it is characterised in that：In step B, the carbonaceous reduction
Agent is at least one of nut coke, coke powder, lean coal, anthracite, bituminous coal or lignite.
5. the method for the melting continuously carbide slag according to any one of Claims 1 to 4, it is characterised in that：In step B, institute
Reduction temperature is stated as 1600~1750 DEG C, it is 80 that reduction reaction, which carries out into slag titanium dioxide and is converted into the conversion ratio of titanium carbide,
~95%.
6. the method for the melting continuously carbide slag according to any one of Claims 1 to 5, it is characterised in that：In step A, institute
The number for stating heating furnace is n, and n is >=1.
7. the method for the melting continuously carbide slag according to any one of claim 1~6, it is characterised in that：The heating is adopted
Institute's calorific requirement is provided with burning carbonaceous reducing agent or natural gas.
8. the method for the melting continuously carbide slag according to any one of claim 1~7, it is characterised in that：The step A melts
Slag flows into carbonization electric furnace by the chute of external heating muff.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109385535A (en) * | 2018-10-29 | 2019-02-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Blast furnace slag high temperature cabonization smelting process |
| CN110106364A (en) * | 2019-06-21 | 2019-08-09 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for preparing titanium carbide slag with Ti-containing slag |
| CN110342517A (en) * | 2019-07-12 | 2019-10-18 | 北京科技大学 | A method of titanium carbide is directly produced with vanadium titano-magnetite |
| CN112251610A (en) * | 2020-09-24 | 2021-01-22 | 攀钢集团攀枝花钢铁研究院有限公司 | Titanium carbide slag and smelting method thereof |
| CN113462901A (en) * | 2021-07-06 | 2021-10-01 | 攀钢集团攀枝花钢钒有限公司 | Method for smelting titanium-containing slag |
| CN114045395A (en) * | 2021-11-15 | 2022-02-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method for smelting titanium-containing slag by using carbonaceous combined reducing agent |
| CN115287461A (en) * | 2022-08-10 | 2022-11-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for continuously smelting titanium carbide slag |
| CN115786638A (en) * | 2022-11-23 | 2023-03-14 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for continuously smelting titanium carbide slag |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109385535A (en) * | 2018-10-29 | 2019-02-26 | 攀钢集团攀枝花钢铁研究院有限公司 | Blast furnace slag high temperature cabonization smelting process |
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| CN114045395A (en) * | 2021-11-15 | 2022-02-15 | 攀钢集团攀枝花钢铁研究院有限公司 | Production method for smelting titanium-containing slag by using carbonaceous combined reducing agent |
| CN115287461A (en) * | 2022-08-10 | 2022-11-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for continuously smelting titanium carbide slag |
| CN115786638A (en) * | 2022-11-23 | 2023-03-14 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for continuously smelting titanium carbide slag |
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