CN106929631A - The dross method that high-titanium blast furnace slag carbonization is smelted - Google Patents
The dross method that high-titanium blast furnace slag carbonization is smelted Download PDFInfo
- Publication number
- CN106929631A CN106929631A CN201710275606.XA CN201710275606A CN106929631A CN 106929631 A CN106929631 A CN 106929631A CN 201710275606 A CN201710275606 A CN 201710275606A CN 106929631 A CN106929631 A CN 106929631A
- Authority
- CN
- China
- Prior art keywords
- dross
- slag
- smelted
- blast furnace
- coke
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/52—Manufacture of steel in electric furnaces
- C21C5/54—Processes yielding slags of special composition
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Disclosed by the invention is the dross method that a kind of high-titanium blast furnace slag carbonization in metal smelt field is smelted, its process is, to contain first during titanium ore, coke be milled into adding after powder electric furnace, energization melting, make electrode centers to the molten bath that mobility is formed between furnace lining inwall, then power transmission power is increased, TiO is completed2Carburizing reagent, finally, after question response terminates, reduce power transmission power, bath temperature is gradually reduced, in temperature-fall period, dross product close at furnace wall slowly solidifies and is combined with furnace lining densification, it is rapid to improve power transmission power when extension thickness of slag layer reaches ideal thickness, make remaining dross product keep mobility to be discharged from slag notch.Combined closely with furnace lining using dross layer obtained in this method, the TiC for playing retaining wall in dross layer is consistent with the main component of final products, will not be come off and polluted product because of dross layer, so as to substantially prolongs the service life of furnace lining while product quality is ensured, save generation maintenance cost.
Description
Technical field
The present invention relates to metal smelt field, more particularly to the dross method that a kind of carbonization of high-titanium blast furnace slag is smelted.
Background technology
At present, climb steel grasped one kind TiCl is prepared from blast furnace slag4New Techniques, one of which key technology is just
It is steel climbing high slag high temperature cabonization technique, is exactly to smelt molten state blast furnace slag with carbon with electric furnace for the process is simple.From present
From the point of view of the condition of production of pilot-scale, electric furnace liner loss is serious, and service life is relatively low, during reason is smelting process, melting
The TiO that state blast furnace slag is rich in2Chemism is extremely strong, can almost be reacted with all of refractory material, so as to corrode fire resisting
Material.The electric furnace life-span is influenceed in order to avoid slag corrosion furnace lining, it is necessary to retain certain thickness dross layer on furnace lining, make to melt
Slag is isolated with furnace lining.
The content of the invention
In order to solve the blast furnace slag high temperature cabonization technique more low deficiency of furnace lining service life, technology to be solved by this invention
Problem is：A kind of dross method that high-titanium blast furnace slag carbonization that dross layer can be set on furnace lining is smelted is provided.
The technical solution adopted for the present invention to solve the technical problems is：The dross side that high-titanium blast furnace slag carbonization is smelted
Method, comprises the following steps：
A, to being pre-processed containing titanium ore, coke, premixed after being milled into powder, wherein the proportioning containing titanium ore and coke with
The content of reaction generation TiC is not less than 30% and is defined；
B, premix adds electric furnace, energization melting makes electrode centers to forming the molten of mobility between furnace lining inwall
Pond；
C, after molten bath is formed completely, further increase power transmission power, complete TiO2Carburizing reagent；
After d, carburizing reagent reach critical point, reduce power transmission power, gradually reduce bath temperature, in temperature-fall period, connect
Dross product at nearly furnace wall slowly solidifies and is combined with furnace lining densification, when extension thickness of slag layer reaches ideal thickness, carries rapidly
Power transmission power high, makes remaining dross product keep mobility to be discharged from slag notch.
It is further to be selected in step a containing TiO in titanium ore2Percentage composition is 35~50%, Fe2O3Percentage composition≤
3%, carbon content >=80%, ash content≤5% are fixed in coke, the mass ratio containing titanium ore and coke is 1:1~1:1.5.
It is further that when being pre-processed to raw material in step a, will grind to form granularity≤2mm's containing titanium ore and coke
Powder.
It is further that when carrying out energization melting in stepb based on melting materialss, bath temperature is controlled at 1500 DEG C
Between~1600 DEG C.
It is further that when carrying out carburizing reagent in step c, bath temperature is controlled at 1700 DEG C~1750 DEG C, with molten bath
Acutely seethe, slag liquid level steeply rises, foundation of the open arc as abundant reaction is exposed in molten bath.
It is further to be begun to decline with slag liquid level in step d, slag is substantially sticky as critical point, bath temperature
Gradually decrease to 1450 DEG C~1480 DEG C.
It is further that the thickness of slag layer of hanging for ultimately forming is the 1/4~1/3 of lining thickness.
The beneficial effects of the invention are as follows：Dross layer, humidity province anaplasia during dross are set using this method on furnace lining
Change obvious so that dross layer is combined more closely with electric furnace liner, reduce the risk that dross layer comes off, and due to actual dross
Temperature can reduce the possibility of slag corrosion dross layer much larger than the temperature of molten state blast furnace slag carbonizing reduction generating process, hang
The TiC for playing retaining wall in slag blanket is consistent with the main component of final products, will not be come off and polluted product because of dross layer, so that
The service life of furnace lining is substantially prolongs while product quality is ensured, generation maintenance cost has been saved.
Specific embodiment
Below by way of specific embodiment, the invention will be further described.
The dross method that high-titanium blast furnace slag carbonization is smelted, comprises the following steps：
A, to being pre-processed containing titanium ore, coke, premixed after being milled into powder, wherein the proportioning containing titanium ore and coke with
The content of reaction generation TiC is not less than 30% and is defined；
B, premix adds electric furnace, energization melting makes electrode centers to forming the molten of mobility between furnace lining inwall
Pond；
C, after molten bath is formed completely, further increase power transmission power, complete TiO2Carburizing reagent；
After d, carburizing reagent reach critical point, reduce power transmission power, gradually reduce bath temperature, in temperature-fall period, connect
Dross product at nearly furnace wall slowly solidifies and is combined with furnace lining densification, when extension thickness of slag layer reaches ideal thickness, carries rapidly
Power transmission power high, makes remaining dross product keep mobility to be discharged from slag notch.
Because the final product obtained by steel climbing high slag high temperature cabonization technique is TiC (percentage composition 13~15%), to keep away
Exempt from dross layer to be melted in smelting and introduce other titaniferous impurity, TiC percentage composition >=30% in dross layer need to be ensured.Carry out
During the proportioning of raw material, the mass ratio containing titanium ore and coke is according to TiO2Grade is different and adjusted, according to Panzhihua locality ore
Composition, the combined factors such as association reaction efficiency and quality consider that raw material optimal selection scheme is：Containing TiO in titanium ore2Percentage composition
It is 35~50%, Fe2O3Percentage composition≤3%, fixes carbon content >=80%, ash content≤5%, containing titanium ore and coke in coke
Mass ratio is 1:1~1:1.5.In order to ensure fully to be reacted with coke containing titanium ore, preferably will contain titanium ore and coke will grind to form granularity
Melting is carried out after the powder of≤2mm again.
Melting is divided into three phases, and the first stage is material melting, and second stage is carburizing reagent, and the phase III is solidification
Form dross layer.The material melting stage so that electrode centers are defined to forming mobility preferable molten bath between furnace lining inwall, melts
Refining temperature control is optimal between 1500 DEG C~1600 DEG C.When granular material forms molten bath completely, carburizing reagent rank is just carried out
Section, the stage is mainly makes TiO2TiC is generated with reduction carbon reaction, course of reaction needs high temperature, need to be maintained at molten bath
1700 DEG C~1750 DEG C.Judge whether material fully reacts, acutely seethed with molten bath, slag liquid level steeply rises, it is sudden and violent in molten bath
Expose foundation of the open arc as abundant reaction；Judge whether reaction terminates, then begun to decline with slag liquid level, slag is substantially sticky
It is critical point, now containing TiO in titanium ore2To conversion ratio >=85% of TiC, dross product is basically formed.Reaction enters after terminating
The phase III of melting, transmitted power is gradually reduced, bath temperature is gradually lowered to 1450 DEG C~1480 DEG C, in temperature-fall period
In, the dross product close at furnace wall can slowly solidify and be combined with furnace lining densification, when extension thickness of slag layer reaches ideal thickness,
It is rapid to improve power transmission power, make remaining dross product keep mobility to be discharged from electric furnace slag notch.It is eventually adhering on furnace lining
Dross forms one layer of dross layer of protection furnace lining, and the extension thickness of slag layer for using the method to be formed can be the 1/4~1/ of lining thickness
3。
Embodiment one：
Dross layer is obtained with certain titanium-containing molten and separated slag and coke powder in 50KVA direct current electric arc furnaces.Using 50KVA direct-current arcs
Stove, raw material proportioning is：Certain titanium-containing molten and separated slag 50%, petroleum coke 60%.Wherein TiO in certain titanium-containing molten and separated slag2Content is
45%, it is 82% that carbon content is fixed in petroleum coke, and ash content is 5%.Certain titanium-containing molten and separated slag and coke powder are milled into granularity first
The powder of≤2mm, beginning power transmission is smelted during direct current electric arc furnace is added to after being well mixed.Incipient melting temperature is 1250 DEG C, treats temperature
Powder is substantially all when degree reaches 1550 DEG C, in stove melts and forms the preferable molten bath of mobility.Increase power transmission power, molten bath temperature
Degree is maintained at 1730 ± 20 DEG C, and now molten bath is acutely seethed, and slag liquid level steeply rises.When slag liquid level begins to decline, slag
Can determine whether to terminate substantially for carburizing reagent after substantially becoming viscous, sampling detects TiO in certain titanium-containing molten and separated slag2To the conversion of TiC
Rate >=85%, thus dross product formed.Then progressively reduce power transmission power, bath temperature is slowly declined, when molten bath center
When temperature is 1460 DEG C, the dross product close at furnace wall slowly solidifies and is combined with furnace lining densification, measures extension thickness of slag layer and is
The 1/3 of lining thickness, TiC percentage compositions are 34.5% in obtaining dross layer finally by detection and analysis.
As can be seen here, use this method to set up dross layer for furnace lining, temperature range change is obvious during dross so that
Dross layer is tightly combined with electric furnace liner, reduces the risk that dross layer comes off, and because actual dross temperature is much larger than molten
Melt the temperature of state blast furnace slag carbonizing reduction generating process, the possibility of slag corrosion dross layer can be reduced, retaining wall is played in dross layer
The TiC of effect is consistent with the main component of final products, will not be come off and polluted product because of dross layer, so as to ensure product matter
The service life of furnace lining is substantially prolongs while amount, generation maintenance cost has been saved, passed through with good practicality and society
Ji value.
Claims (7)
1. the dross method that high-titanium blast furnace slag carbonization is smelted, it is characterized in that, comprise the following steps：
A, to being pre-processed containing titanium ore, coke, premixed after being milled into powder, wherein containing titanium ore and the proportioning of coke reacting
The content of generation TiC is not less than 30% and is defined；
B, by premix add electric furnace in, energization melting, make electrode centers between furnace lining inwall formed mobility molten bath；
C, after molten bath is formed completely, further increase power transmission power, complete TiO2Carburizing reagent；
After d, carburizing reagent reach critical point, reduce power transmission power, bath temperature is gradually reduced, in temperature-fall period, close to stove
Dross product at wall slowly solidifies and is combined with furnace lining densification, and when extension thickness of slag layer reaches ideal thickness, rapid raising is sent
Electrical power, makes remaining dross product keep mobility to be discharged from slag notch.
2. the dross method that high-titanium blast furnace slag carbonization as claimed in claim 1 is smelted, it is characterized in that：Selected in step a
Containing TiO in titanium ore2Percentage composition is 35~50%, Fe2O3Percentage composition≤3%, fixes carbon content >=80%, ash content in coke
≤ 5%, the mass ratio containing titanium ore and coke is 1:1~1:1.5.
3. the dross method that high-titanium blast furnace slag carbonization as claimed in claim 2 is smelted, it is characterized in that：To raw material in step a
When being pre-processed, the powder of granularity≤2mm will be ground to form containing titanium ore and coke.
4. the dross method that high-titanium blast furnace slag carbonization as claimed in claim 1 is smelted, it is characterized in that：Carry out in stepb
During energization melting based on melting materialss, bath temperature is controlled between 1500 DEG C~1600 DEG C.
5. the dross method that high-titanium blast furnace slag carbonization as claimed in claim 1 is smelted, it is characterized in that：Carbon is carried out in step c
When changing reaction, bath temperature is controlled at 1700 DEG C~1750 DEG C, is acutely seethed with molten bath, and slag liquid level steeply rises, in molten bath
Expose foundation of the open arc as abundant reaction.
6. the dross method that high-titanium blast furnace slag carbonization as claimed in claim 1 is smelted, it is characterized in that：With slag in step d
Liquid level begins to decline, and slag is substantially sticky as critical point, and bath temperature gradually decreases to 1450 DEG C~1480 DEG C.
7. the dross method that high-titanium blast furnace slag carbonization as claimed in claim 1 is smelted, it is characterized in that：The dross for ultimately forming
Thickness degree is the 1/4~1/3 of lining thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710275606.XA CN106929631B (en) | 2017-04-25 | 2017-04-25 | The dross method that high-titanium blast furnace slag carbonization is smelted |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710275606.XA CN106929631B (en) | 2017-04-25 | 2017-04-25 | The dross method that high-titanium blast furnace slag carbonization is smelted |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106929631A true CN106929631A (en) | 2017-07-07 |
| CN106929631B CN106929631B (en) | 2019-03-01 |
Family
ID=59437413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710275606.XA Active CN106929631B (en) | 2017-04-25 | 2017-04-25 | The dross method that high-titanium blast furnace slag carbonization is smelted |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106929631B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109913662A (en) * | 2019-04-28 | 2019-06-21 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for improving high-titanium blast furnace slag carbonization electric furnace liner service life |
| CN110643826A (en) * | 2019-11-06 | 2020-01-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Furnace drying method for carbon-thermal method titanium extraction electric furnace |
| CN111876552A (en) * | 2020-08-07 | 2020-11-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for adhering slag to water-cooled wall electric furnace |
| CN112430745A (en) * | 2020-11-11 | 2021-03-02 | 昆明理工大学 | Slag adhering method for oxygen-enriched top-blown immersion smelting lead-smelting process spray gun |
| CN112668148A (en) * | 2020-12-04 | 2021-04-16 | 攀钢集团研究院有限公司 | Method for judging upper airflow distribution condition and furnace condition of high-titanium blast furnace |
| CN112880409A (en) * | 2021-01-12 | 2021-06-01 | 甘肃金麓银峰冶金科技有限公司 | Method for prolonging service life of refractory material at bottom of ferronickel electric furnace and bottom of ferronickel electric furnace |
| CN112981097A (en) * | 2021-02-07 | 2021-06-18 | 甘肃金麓银峰冶金科技有限公司 | Furnace wall and slag adhering method of water-cooling-wall-free nickel-iron ore thermoelectric furnace |
| CN115572172A (en) * | 2022-09-09 | 2023-01-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Utilization method of waste graphite electrode and electric furnace |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348845A (en) * | 2008-08-20 | 2009-01-21 | 攀钢集团钛业有限责任公司 | Method for smelting titanium slag in electric furnace |
| CN101985697A (en) * | 2010-11-10 | 2011-03-16 | 攀钢集团钢铁钒钛股份有限公司 | Electric furnace charging process for high-titanium blast furnace slag carbonization |
| CN103820600A (en) * | 2014-03-05 | 2014-05-28 | 攀钢集团钛业有限责任公司 | Method for adhering slag onto electric furnace for smelting titanium slag |
| CN104087697A (en) * | 2014-07-04 | 2014-10-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for maintaining slag adhering layer of titanium slag smelting electric furnace |
-
2017
- 2017-04-25 CN CN201710275606.XA patent/CN106929631B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101348845A (en) * | 2008-08-20 | 2009-01-21 | 攀钢集团钛业有限责任公司 | Method for smelting titanium slag in electric furnace |
| CN101985697A (en) * | 2010-11-10 | 2011-03-16 | 攀钢集团钢铁钒钛股份有限公司 | Electric furnace charging process for high-titanium blast furnace slag carbonization |
| CN103820600A (en) * | 2014-03-05 | 2014-05-28 | 攀钢集团钛业有限责任公司 | Method for adhering slag onto electric furnace for smelting titanium slag |
| CN104087697A (en) * | 2014-07-04 | 2014-10-08 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for maintaining slag adhering layer of titanium slag smelting electric furnace |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109913662A (en) * | 2019-04-28 | 2019-06-21 | 攀钢集团攀枝花钢铁研究院有限公司 | The method for improving high-titanium blast furnace slag carbonization electric furnace liner service life |
| CN110643826A (en) * | 2019-11-06 | 2020-01-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Furnace drying method for carbon-thermal method titanium extraction electric furnace |
| CN111876552A (en) * | 2020-08-07 | 2020-11-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for adhering slag to water-cooled wall electric furnace |
| CN112430745A (en) * | 2020-11-11 | 2021-03-02 | 昆明理工大学 | Slag adhering method for oxygen-enriched top-blown immersion smelting lead-smelting process spray gun |
| CN112668148A (en) * | 2020-12-04 | 2021-04-16 | 攀钢集团研究院有限公司 | Method for judging upper airflow distribution condition and furnace condition of high-titanium blast furnace |
| CN112880409A (en) * | 2021-01-12 | 2021-06-01 | 甘肃金麓银峰冶金科技有限公司 | Method for prolonging service life of refractory material at bottom of ferronickel electric furnace and bottom of ferronickel electric furnace |
| CN112880409B (en) * | 2021-01-12 | 2022-11-11 | 甘肃金麓银峰冶金科技有限公司 | Method for prolonging service life of refractory material at bottom of ferronickel electric furnace and bottom of ferronickel electric furnace |
| CN112981097A (en) * | 2021-02-07 | 2021-06-18 | 甘肃金麓银峰冶金科技有限公司 | Furnace wall and slag adhering method of water-cooling-wall-free nickel-iron ore thermoelectric furnace |
| CN115572172A (en) * | 2022-09-09 | 2023-01-06 | 攀钢集团攀枝花钢铁研究院有限公司 | Utilization method of waste graphite electrode and electric furnace |
| CN115572172B (en) * | 2022-09-09 | 2023-06-30 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for utilizing waste graphite electrode and electric furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106929631B (en) | 2019-03-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106929631A (en) | The dross method that high-titanium blast furnace slag carbonization is smelted | |
| CN109913662B (en) | Method for prolonging service life of high-titanium blast furnace slag carbonization electric furnace lining | |
| CN101985697B (en) | Electric furnace charging process for high-titanium blast furnace slag carbonization | |
| CN105950804B (en) | A kind of blast furnace slag restoring method | |
| CN108866343A (en) | Two step reduction and carbonization methods of titanium-containing blast furnace slag | |
| CN101914689A (en) | Method for producing low-oxygen electro-technical copper wire blank with waste copper | |
| CN106755724B (en) | A kind of smelting technology being suitable for 3 tons of intermediate frequency furnace production nodulizers | |
| CN103820600B (en) | The dross method of smelting titanium slag with electric stove | |
| CN106011601A (en) | External refining method for smelting ferrovanadium | |
| CN107964599B (en) | Straight-barrel furnace ferrovanadium smelting method capable of improving vanadium yield | |
| CN104762488B (en) | A kind of method of direct vanadium alloying in esr process | |
| CN103643056B (en) | The smelting process of low carbon ferromanganese | |
| CN103421923B (en) | A kind of smelting process of vanadium-bearing hot metal | |
| CN105543563B (en) | A kind of zinc-copper titanium intermediate alloy method of smelting for reducing titanium elements scaling loss | |
| CN102041395A (en) | Electroslag remelting arc initiator and arcing method thereof | |
| CN103643094B (en) | The smelting process of high carbon ferromanganese | |
| CN103964437B (en) | A kind of method controlling titanium carbide slag production process furnace bottom rising | |
| CN110714106A (en) | Blast furnace optimization smelting method of high-titanium type vanadium titano-magnetite | |
| CN106467936B (en) | A kind of preparation method of Silcaz | |
| CN105420548B (en) | A kind of lead-calcium alloy production method | |
| CN100485064C (en) | Composite heat generating agent in use for producing ferrotitanium | |
| CN109487091B (en) | Electroslag remelting arc striking agent and preparation method thereof | |
| CN102586541B (en) | Steelmaking method suitable for small power electric arc furnace | |
| CN110699592A (en) | Preparation process of high-carbon ferrochrome | |
| Senapati et al. | Ferro silicon operation at IMFA–a critical analysis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |