CN106811576B - A kind of hot circulation utilization method of vessel slag - Google Patents
A kind of hot circulation utilization method of vessel slag Download PDFInfo
- Publication number
- CN106811576B CN106811576B CN201510870406.XA CN201510870406A CN106811576B CN 106811576 B CN106811576 B CN 106811576B CN 201510870406 A CN201510870406 A CN 201510870406A CN 106811576 B CN106811576 B CN 106811576B
- Authority
- CN
- China
- Prior art keywords
- slag
- ladle
- molten steel
- clinker
- converter
- 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.)
- Active
Links
Classifications
-
- 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
Abstract
The invention discloses a kind of hot circulation utilization method of vessel slag, converter tapping process does not control the lower quantity of slag, and during reversing clinker to ladle introversion, into ladle, slag reduction agent is added in the top of the slag incessantly；The chemical reaction of phosphorus, silicon, manganese, ferriferous oxide in slag reduction agent and clinker is realized using the high-temperature region that LF heated by electrodes is formed, while carrying out bottom blowing stirring, and gas flow is 0.04~0.12Nm3/ ht, mixing time 5-20min；After clinker is reduced sufficiently, molten steel phosphorus, silicon, the influence of manganese ingredient and steel grade are required according to after slag reduction, Alloying Treatment is carried out to molten steel；After casting, hot casting residue is poured into the molten iron surface after skimming, is blended into converter with molten iron.The present invention had not only saved the alloy consumption and steel technology of molten steel alloying process, but also saved the slag charge consumption of reduction refining process, realizes the hot of vessel slag and recycles.
Description
Technical field
The invention belongs to steelmaking technical field, in particular to a kind of hot circulation utilization method of vessel slag.
Background technique
Vessel slag is the treasured that generates most solid waste and iron and steel enterprise in convertor steelmaking process and can develop and use
Your resource.The mineral structure of vessel slag depends primarily on chemical composition, as the basicity (CaO/SiO of clinker2When) < 1.8, main mine
Object is CMS (forsterite), C3MS2(manganolite)；When basicity is 1.8-2.5, essential mineral C2S (dicalcium silicate),
C2F (dicalcium ferrite) and RO phase (Fe, Mn, Mg bivalent metal oxide solid solution based on FeO)；When basicity is 2.5 or more,
Essential mineral is C3S (tricalcium silicate), C2S、C2Furthermore F and RO phase also contains a small amount of free calcium oxide, typically in steel slag
The following table of converter slag ingredient.
The typical converter slag ingredient of table 1, %
| CaO | SiO2 | MgO | MnO | P2O5 | FeO | f(CaO) | S |
| 40-50 | 10-15 | 8-10 | 1-3 | 0.5-1.5 | 15-25 | <2 | <0.1 |
Currently, domestic steel mill's vessel slag recycling mainly includes cold conditions recycling and two kinds of techniques of hot recycling.Cold conditions recycling is general
All over using drum process and the bored method technique of heat, have take up little area, treatment effeciency is high, slag iron separation more thoroughly, the spies such as tailing particles are small
Point can effectively recycle the iron resource in vessel slag in conjunction with current slag micro powder technology, while produce construction material.Heat
State recycling mainly includes converter double slag, duplexs and stays slag technique, i.e., stays a part in furnace internal reference the vessel slag that a upper furnace is smelted
Refining is realized using slag characteristic, higher alkalisation, higher oxygen etc. possessed by molten state vessel slag with the smelting of next furnace
The rapid slagging of steel process and saving slag charge consumption, the part that this technique realizes vessel slag recycles.
Summary of the invention
The object of the present invention is to provide a kind of hot circulation utilization methods of vessel slag, i.e., by carrying out also original place to vessel slag
Reason, using the vessel slag after reduction to molten steel carry out desulfurization, deoxidation treatment, while can also in vessel slag beneficial element and
Ferro element is recycled, and continues cycling through use in addition it can which the vessel slag after reduction is come back to converter.
A kind of hot circulation utilization method of vessel slag, technical solution include:
(1) converter tapping process does not control the lower quantity of slag, enters the molten steel in converter all in ladle, while making converter
Middle a part of molten state vessel slag enters in ladle, guarantees that the ratio of the quantity of slag and Metal Weight is 0.005-0.02, to ladle
During clinker is reversed in introversion, into ladle, slag reduction agent is added in the top of the slag incessantly.
(2) ladle is transported to LF treating stations after converter tapping, realizes furnace using the high-temperature region that LF heated by electrodes is formed
The chemical reaction of phosphorus, silicon, manganese, ferriferous oxide in slag reducing agent and clinker, while being stirred using bottom blowing stirring gas, gas
Flow is 0.04Nm3/ ht~0.12Nm3/ ht, mixing time 5min-20min.
(3) after clinker is reduced sufficiently, increase Bottom Blowing Gas Flow Rate to 0.25Nm3/ ht~0.40Nm3/ ht, benefit
Reduction refining is carried out to molten steel with clinker, meets molten steel desulfurizing, deoxy technology requirement, at the same according to after slag reduction to molten steel
Phosphorus, silicon, the influence of manganese ingredient and steel grade requirement, carry out Alloying Treatment to molten steel, after waiting molten steel compositions and temperature to meet the requirements
Upper machine casting.
(4) after being poured, the ladle equipped with hot casting residue is transported to molten iron drossing station, hot casting residue is poured into
Molten iron surface after skimming, is hereafter blended into converter with molten iron.Due to (the P in thermal slag2O5) and (SiO2) by portion
Divide reduction, therefore clinker has the characteristics that high alkalinity, high phosphorus holds and molten state, can participate in the dephosphorisation reaction in converter, saves
The consumption of converter slag-making material, while converter rapid slagging may be implemented, shorten the converter producing time.
A kind of hot circulation utilization method of vessel slag as described above, it is characterised in that: molten steel stirring gas can be Ar,
N2、CO2One or more of.
A kind of hot circulation utilization method of vessel slag as described above, it is characterised in that: the main composition of slag reduction agent
Element can be the one or more of aluminium, carbon, calcium, the additional amount of slag reduction agent meet can in vessel slag phosphorus, silicon,
Iron, manganese oxide be all reduced to simple substance.
Compared with the prior art, the invention has the following beneficial effects:
By restoring phosphorus, silicon, manganese, the ferriferous oxide in clinker, on the one hand may be implemented to beneficial element in vessel slag
With the recycling of ferro element, the alloy consumption and steel technology of molten steel alloying process are saved, on the other hand can also be utilized
The high alkalinity of clinker, low oxidative and melting characteristic carry out reduction refining to molten steel after reduction, save the slag of reduction refining process
Material consumption, the clinker after reduction, which can also return in converter, to be continued to use, and realizes that the hot of vessel slag recycles.
Specific embodiment
Embodiment 1:
(1) converter tapping quantity 250t, tapping process do not control the lower quantity of slag, the molten steel in converter are made all to enter ladle as far as possible
In, so that a part of molten state vessel slag pours into ladle in converter, the quantity of slag is 2.1t in ladle, is reversed to ladle introversion
During clinker, into ladle, a certain amount of carburant is added as slag reduction agent in the top of the slag incessantly, and carbon contains in carburant
Amount is 90%, and carburant 470kg is added altogether.
(2) ladle is transported to LF processing station, clinker and molten steel is heated using LF graphite electrode, while utilizing LF
The high-temperature area that graphite electrode is formed completes (P in reducing agent and vessel slag2O5)、(SiO2), the reaction of (MnO), (FeO), electrode
Voltage 435V, electric current 50000A.It is stirred simultaneously using argon bottom-blowing, 20 Nm of argon bottom-blowing flow3/ h, mixing time
14min, treatment process do not add any slag material.
(3) after clinker sufficiently restores, increase argon bottom-blowing flow to 80 Nm3/ h to molten steel carry out desulfurization, deoxidation and sufficiently
Stirring requires upper machine after carrying out corresponding alloying to cast thereafter according to steel grades.
Molten steel, slag composition before converter tapping and LF alloying is as shown in table 2.As can be seen from the table, pass through utilization
Reducing agent carries out reduction treatment to clinker, so that (the P before LF alloying in clinker2O5)、(SiO2), (MnO), (FeO) content ratio
Converter tapping process decreases, at the same clinker be reduced after molten steel [Si], [Mn], [P] content can be made to increased.
2 molten steel of table and slag composition variation, %
| [C] | [Si] | [Mn] | [P] | [S] | (P2O5) | (SiO2) | (MnO) | (FeO) | |
| Converter tapping | 0.04 | 0.01 | 0.05 | 0.013 | 0.020 | 1.2 | 12.3 | 2.1 | 17.8 |
| Before LF alloying | 0.15 | 0.045 | 0.062 | 0.016 | 0.022 | 0.2 | 3.7 | 0.3 | 2.9 |
(4) after being poured, the ladle equipped with hot casting residue is transported to molten iron drossing station, hot casting residue is poured into
Molten iron surface after skimming, is hereafter blended into converter with molten iron.
Embodiment 2:
(1) converter tapping quantity 253t, tapping process do not control the lower quantity of slag, the molten steel in converter are made all to enter ladle as far as possible
In, so that a part of molten state vessel slag pours into ladle in converter, the quantity of slag is 2.5t in ladle, is reversed to ladle introversion
During clinker, into ladle, a certain amount of metallic aluminium is added as slag reduction agent in the top of the slag incessantly, and metallic aluminium is added altogether
400kg。
(2) ladle is transported to LF processing station, clinker and molten steel is heated using LF graphite electrode, while utilizing and adding
The high-temperature area that thermal process is formed completes (P in metallic aluminium and vessel slag2O5)、(SiO2), the reaction of (MnO), (FeO).Electrode electricity
435V, electric current 50000A are pressed, while being stirred using bottom blowing nitrogen, 15 Nm of bottom blowing nitrogen flow3/ h, mixing time
10min, treatment process do not add any slag material.
(3) after slag reduction, bottom blown gas is switched to argon gas, increases argon bottom-blowing flow to 90 Nm3/ h completes steel
It the desulfurization of water, deoxidation and is sufficiently stirred, requires to carry out upper machine casting after corresponding alloying thereafter according to steel grades.
Molten steel, slag composition before converter tapping and LF alloying is as shown in table 3.As can be seen from the table, pass through utilization
Reducing agent carries out reduction treatment to clinker, so that (the P in vessel slag2O5)、(SiO2), (MnO), (FeO) be reduced, after reduction
So that [Si] of molten steel, [Mn], [P] content increased.
3 molten steel of table and slag composition variation, %
| [C] | [Si] | [Mn] | [P] | [S] | (P2O5) | (SiO2) | (MnO) | (FeO) | |
| Converter tapping | 0.035 | 0.01 | 0.05 | 0.015 | 0.025 | 1.1 | 14.2 | 1.8 | 19.3 |
| Before LF alloying | 0.05 | 0.04 | 0.058 | 0.017 | 0.025 | 0.17 | 4.5 | 0.28 | 2.5 |
(4) after being poured, the ladle equipped with hot casting residue is transported to molten iron drossing station, hot casting residue is poured into
Molten iron surface after skimming, is hereafter blended into converter with molten iron.
Claims (3)
1. a kind of hot circulation utilization method of vessel slag, it is characterised in that the following steps are included:
(1) converter tapping process does not control the lower quantity of slag, enters the molten steel in converter all in ladle, while making one in converter
Partial melting state vessel slag enters in ladle, guarantees that the ratio of the quantity of slag and Metal Weight is 0.005-0.02, to ladle introversion
During reversing clinker, into ladle, slag reduction agent is added in the top of the slag incessantly；
(2) ladle is transported to LF treating stations after converter tapping, realizes clinker also using the high-temperature region that LF heated by electrodes is formed
The chemical reaction of phosphorus, silicon, manganese, ferriferous oxide in former agent and clinker, while being stirred using bottom blowing stirring gas, gas flow
For 0.04Nm3/ ht~0.12Nm3/ ht, mixing time 5min-20min；
(3) after clinker is reduced sufficiently, increase Bottom Blowing Gas Flow Rate to 0.25Nm3/ ht~0.40Nm3/ ht, utilizes furnace
Slag carries out reduction refining to molten steel, meets molten steel desulfurizing, deoxy technology requirement, at the same according to after slag reduction to molten steel phosphorus, silicon,
The influence of manganese ingredient and steel grade requirement carry out Alloying Treatment, the upper machine casting after meeting the requirements of molten steel composition and temperature to molten steel；
(4) after being poured, the ladle equipped with hot casting residue is transported to molten iron drossing station, hot casting residue is poured into and is skimmed
Molten iron surface afterwards, is hereafter blended into converter with molten iron.
2. the hot circulation utilization method of a kind of vessel slag according to claim 1, it is characterised in that: molten steel stirring gas is
Ar、N2、CO2One or more of.
3. the hot circulation utilization method of a kind of vessel slag according to claim 1, it is characterised in that: the master of slag reduction agent
Wanting component is the one or more of aluminium, carbon, calcium, the additional amount of slag reduction agent meet can in vessel slag phosphorus, silicon,
Iron, manganese oxide be all reduced to simple substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510870406.XA CN106811576B (en) | 2015-12-02 | 2015-12-02 | A kind of hot circulation utilization method of vessel slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510870406.XA CN106811576B (en) | 2015-12-02 | 2015-12-02 | A kind of hot circulation utilization method of vessel slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106811576A CN106811576A (en) | 2017-06-09 |
| CN106811576B true CN106811576B (en) | 2019-01-04 |
Family
ID=59108427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510870406.XA Active CN106811576B (en) | 2015-12-02 | 2015-12-02 | A kind of hot circulation utilization method of vessel slag |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106811576B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109609721B (en) * | 2018-12-19 | 2019-11-22 | 钢铁研究总院 | A kind of method that converter recycles the hot casting residue of ladle |
| CN109797338A (en) * | 2019-02-11 | 2019-05-24 | 黑龙江建龙钢铁有限公司 | A kind of big packet of square billet process pours remaining back to half ladle semisteel smelting technique |
| CN110669900B (en) * | 2019-10-08 | 2021-08-06 | 安徽富凯特材有限公司 | Method for reutilization of AOD pre-reduced slag |
| CN111996314A (en) * | 2020-07-31 | 2020-11-27 | 鞍钢股份有限公司 | Method for extracting iron by using carbon reduction thermal state converter slag |
| CN115491444B (en) * | 2022-08-30 | 2024-01-30 | 马鞍山钢铁股份有限公司 | Method for preventing ladle from adhering and splashing by hot return of ladle casting residue to converter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008223095A (en) * | 2007-03-13 | 2008-09-25 | Jfe Steel Kk | Method for producing high phosphorus slag |
| CN101984088A (en) * | 2010-11-16 | 2011-03-09 | 东北大学 | Method for preparing premelted refining slag by using converter slag and aluminum slag |
| CN102264919A (en) * | 2008-12-26 | 2011-11-30 | 杰富意钢铁株式会社 | Method for reclaiming iron and phosphorus from steelmaking slag |
| CN102719622A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Method for recycle of steel-making casting-remnant heat-state steel slag |
| JP5233897B2 (en) * | 2009-07-31 | 2013-07-10 | ソニー株式会社 | Image processing apparatus and method |
| CN103361468A (en) * | 2013-07-15 | 2013-10-23 | 芜湖新兴铸管有限责任公司 | Treatment method for continuous casting of thermal steel slag |
| CN104611513A (en) * | 2015-02-03 | 2015-05-13 | 河北钢铁股份有限公司承德分公司 | Method for utilizing vanadium in steel slag |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5233897A (en) * | 1975-09-10 | 1977-03-15 | Nippon Steel Corp | Method for treatment of iron slag |
-
2015
- 2015-12-02 CN CN201510870406.XA patent/CN106811576B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008223095A (en) * | 2007-03-13 | 2008-09-25 | Jfe Steel Kk | Method for producing high phosphorus slag |
| CN102264919A (en) * | 2008-12-26 | 2011-11-30 | 杰富意钢铁株式会社 | Method for reclaiming iron and phosphorus from steelmaking slag |
| JP5233897B2 (en) * | 2009-07-31 | 2013-07-10 | ソニー株式会社 | Image processing apparatus and method |
| CN101984088A (en) * | 2010-11-16 | 2011-03-09 | 东北大学 | Method for preparing premelted refining slag by using converter slag and aluminum slag |
| CN102719622A (en) * | 2011-03-29 | 2012-10-10 | 鞍钢股份有限公司 | Method for recycle of steel-making casting-remnant heat-state steel slag |
| CN103361468A (en) * | 2013-07-15 | 2013-10-23 | 芜湖新兴铸管有限责任公司 | Treatment method for continuous casting of thermal steel slag |
| CN104611513A (en) * | 2015-02-03 | 2015-05-13 | 河北钢铁股份有限公司承德分公司 | Method for utilizing vanadium in steel slag |
Non-Patent Citations (4)
| Title |
|---|
| Thermodynamics analysis of slag recycling using a slag regenerator;H.-J.Li等;《ISIJ International》;19951231;第35卷;全文 |
| 转炉钢渣资源利用的新方法;杜传明;《山东冶金》;20120430;第34卷(第2期);全文 |
| 钢渣中同时回收铁和磷的资源化利用新思路;王德永等;《中国冶金》;20110831;第21卷(第8期);全文 |
| 高温碳热还原进行转炉渣资源化的研究;李光强等;《材料与冶金学报》;20030930;第2卷(第3期);全文 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106811576A (en) | 2017-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106811576B (en) | A kind of hot circulation utilization method of vessel slag | |
| CN102952923B (en) | Process for smelting aluminum containing steel through calcium carbide deoxidation | |
| CN100432240C (en) | Electric furnace highly effective metallurgy complexing agent | |
| CN106086608B (en) | A kind of method that low-carbon manganese-silicon is produced using carbon manganese slag | |
| CN107904355A (en) | A kind of production method of silicon deoxidation low-sulfur high-carbon steel | |
| CN103397146A (en) | Production method of pipeline steel | |
| CN105506226B (en) | A kind of method that hot metal desiliconization, pre- decarburization and pre- dephosphorization are carried out in hot-metal bottle | |
| CN105671248A (en) | Smelting method of converter efficient dephosphorization | |
| CN101294230B (en) | Duplex steelmaking technique of revolving furnace | |
| CN107365949A (en) | A kind of method of smelting ultralow-carbon high-alloy stainless steel | |
| CN105950826B (en) | A kind of ladle refining furnace refining slag deoxidier and its application method | |
| CN104195290A (en) | Molten steel dephosphorization agent and molten steel dephosphorization refining method | |
| CN103627843B (en) | Semi-steel making slagging method and Semi-steel making method | |
| CN106480353A (en) | A kind of method that utilization vanadium-bearing hot metal carries out alloying to HRB400 steel | |
| CN100371480C (en) | Method of directly smelting vanadium alloy steel or vanadium titanium alloy steel using vanadium containing pig iron or sponge iron | |
| CN105463149A (en) | Process for deoxidation smelting of aluminum-bearing steel by means of silicon carbide | |
| CN103215406B (en) | Low-carbon and ultralow sulfur steel smelting method | |
| CN102465239B (en) | Method for increasing sulfur yield of high sulfur stainless steel | |
| CN113832380A (en) | Smelting method of ultralow-aluminum-content low-sulfur non-oriented silicon steel | |
| CN103643094A (en) | Smelting method of high-carbon ferromanganese | |
| CN100540685C (en) | direct steel alloying method | |
| CN103031409B (en) | Novel process of steelmaking deoxidization by utilizing precipitator dust of refining furnace | |
| CN111926137B (en) | Preparation method for producing ship plate by adopting high-phosphorus, high-arsenic and high-sulfur molten iron | |
| CN111074037B (en) | Process method for upgrading structure of manganese-rich slag smelting product | |
| CN104046748B (en) | A kind of liquid steel dephosphorization agent and the method for liquid steel dephosphorization |
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 |