CN104046721A - Slag-blocking rod for converter - Google Patents
Slag-blocking rod for converter Download PDFInfo
- Publication number
- CN104046721A CN104046721A CN201410105735.0A CN201410105735A CN104046721A CN 104046721 A CN104046721 A CN 104046721A CN 201410105735 A CN201410105735 A CN 201410105735A CN 104046721 A CN104046721 A CN 104046721A
- Authority
- CN
- China
- Prior art keywords
- slag
- steel
- blocking rod
- scum rod
- 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.)
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Classifications
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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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- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention relates to a chemical slag-blocking rod for a converter. The chemical slag-blocking rod comprises 20-30wt% of slag iron granules, 10-20wt% of grain steel obtained by a steel slag factory, 10-20wt% of iron ore, 10-20wt% of clay, 10-15wt% of high-aluminum powder and 10-15wt% of sodium silicate. The slag-blocking rod is produced strictly by the technical formula and has a high slag-blocking rate more than 95% on steel-making site. Through use of grain steel obtained by the steel slag factory and slag iron granules as raw materials, resources are saved, waste and old utilization is realized and a slag-blocking rod product cost can be reduced.
Description
Technical field
The present invention relates to a kind of chemical scum rod, for converter steelmaking, produce the refining of molten steel.
Background technology
Along with the raising day by day that user requires steel product quality, improve the main direction that steel quality and Optimization Technology have become metallargist's research.In converter steelmaking is produced, the removal of the harmful elements such as the decarburization in stove, intensification and phosphorus, sulphur is all closely related with slag.Therefore, converter slag has higher oxidisability, and be rich in the elements harmful to steel quality such as phosphorus, sulphur, in converter tapping process, if slag flows into ladle in the lump with molten steel, not only can increase the deoxidation and alloying difficulty of molten steel, increase reductor and alloy consumption, increase steel-making cost, also can cause ladle rephosphorization, return sulphur and increase oxide inclusion content, the cleanliness factor that reduces molten steel, has a strong impact on steel quality.The lower quantity of slag while reducing converter tapping is to improve an important means of steel quality, carries out pushing off the slag effectively during converter tapping, can reduce rephosphorization of molten steel, improves yield of alloy; Can also reduce steel inclusion, improve molten steel cleanliness; Reduce ladle dry slag, improve ladle life, reduce refractory consumption; And provide good condition for liquid steel refining.
Summary of the invention
The object of this invention is to provide a kind of coverter pig scum rod, this scum rod can improve pushing off the slag rate, makes the infiltration of anti-molten steel and volume density meets the requirements completely, pushing off the slag effect can meet process for making requirement.
The present invention seeks to realize like this: a kind of coverter pig scum rod, the chief component composition (weight percent) of this scum rod: slag abrasive grit: 20-30%, slag factory grain steel: 10-20%, iron ore: 10-20%, clay: 10-20%, high-alumina fly: 10-15%, water glass: 10-15%.
The best proportioning (weight percent) of scum rod of the present invention is: slag abrasive grit: 30%, and slag factory grain steel: 20%, iron ore: 10%, clay: 20%, high-alumina fly 200 orders: 15%, water glass: 15%.
Converter taphole scum rod is the functional refractory materials of converter taphole, in the converter tapping later stage, liquid steel level reduces, slag is easily brought in converter steel bag by tap hole eddy current, scum rod inserts tap hole with mechanical manipulator, utilize difference between himself density (4.0-4.5 g/cm3) and molten steel (6.8-7.0 g/cm3) and slag blanket (2.6-3.0 g/cm3), reach the object of pushing off the slag.The development of scum rod mainly consider own vol density and in molten steel shelf-time and permeability resistance, volume density must be greater than 4.0g/cm
3, scum rod anti-molten steel perviousness in molten steel is greater than 1 minute.
Scum rod starting material of the present invention are pressed Technology formula stirring and evenly mixing, then use 300 t hydraulic press compression mouldings, put into the dry free-water of sloughing of drying kiln (150 ℃) after maintenance, and dry kiln discharge is by vibratory compaction.Just the head of scum rod bar portion and scum rod can be assembled, the finished product scum rod assembling is put into dispensing frame and is delivered to the on-the-spot use of steel-making.
Iron ore is the important raw and processed materials of steel production enterprise, natural crystal (iron ore) through broken, grind, magnetic separation, flotation, gravity treatment supervisor select iron gradually.To contain the mineral aggregate that ferro element or iron cpd can economic utilizations.
Clay be containing the grains of sand seldom, have the soil of stickiness, moisture is not easy therefrom to pass through.Clay has good plasticity-, mainly comprises kaolin, halloysite, (<2 μ m) aluminium silicate salt that particle is very little.Except aluminium, clay also comprises a small amount of magnesium, iron, sodium, potassium and calcium.
scum rod experimental formula data of the present invention are as follows:
the present inventionscum rod product is strictly produced by Technology formula, and the on-the-spot pushing off the slag rate of using of steel-making is high, and pushing off the slag rate is greater than 95%.The use of raw material slag abrasive grit Ji Zha factory grain steel, has saved resource, has realized waste and old utilization, makes the cost of scum rod product have the space reducing simultaneously.
Embodiment
Embodiment 1: a kind of coverter pig scum rod, and this scum rod compositing formula comprises following component (weight percent): slag abrasive grit: 20%, slag factory grain steel: 30%, iron ore: 20%, clay: 10%, high-alumina fly: 10%, water glass: 10%.
Embodiment 2: a kind of coverter pig scum rod, and this scum rod compositing formula comprises following component (weight percent): slag abrasive grit: 20%, slag factory grain steel: 20%, iron ore: 15%, clay: 20%, high-alumina fly: 10%, water glass: 15%.
Embodiment 3: a kind of coverter pig scum rod, and this scum rod compositing formula comprises following component (weight percent): slag abrasive grit: 30%, slag factory grain steel: 20%, iron ore: 10%, clay: 10%, high-alumina fly: 15%, water glass: 15%.
Scum rod
preferablyformula following (weight percent) is: slag abrasive grit: 30%, and slag factory grain steel: 20%, iron ore: 10%, clay: 10%, high-alumina fly 200 orders: 10%, water glass: 15%.
Claims (2)
1. a coverter pig scum rod, is characterized in that: the chief component composition (weight percent) of this scum rod: slag abrasive grit: 20-30%, slag factory grain steel: 10-20%, iron ore: 10-20%, clay: 10-20%, high-alumina fly: 10-15%, water glass: 10-15%.
2. coverter pig scum rod according to claim 1, is characterized in that: the optimum ratio of this scum rod (weight percent) is: slag abrasive grit: 30%, and slag factory grain steel: 20%, iron ore: 10%, clay: 10%, high-alumina fly 200 orders: 15%, water glass: 15%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410105735.0A CN104046721A (en) | 2014-03-21 | 2014-03-21 | Slag-blocking rod for converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410105735.0A CN104046721A (en) | 2014-03-21 | 2014-03-21 | Slag-blocking rod for converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104046721A true CN104046721A (en) | 2014-09-17 |
Family
ID=51500115
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410105735.0A Pending CN104046721A (en) | 2014-03-21 | 2014-03-21 | Slag-blocking rod for converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104046721A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105950822A (en) * | 2016-03-07 | 2016-09-21 | 安徽云天冶金科技股份有限公司 | High-fire-proof slag-stopping ball used for converter steelmaking and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413046A (en) * | 2008-11-27 | 2009-04-22 | 莱芜钢铁股份有限公司 | Homogeneous slag bridge for converter tapping |
-
2014
- 2014-03-21 CN CN201410105735.0A patent/CN104046721A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101413046A (en) * | 2008-11-27 | 2009-04-22 | 莱芜钢铁股份有限公司 | Homogeneous slag bridge for converter tapping |
Non-Patent Citations (1)
| Title |
|---|
| 马青花: "转炉出钢口用挡渣棒的生产与研制", 《新疆钢铁》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105950822A (en) * | 2016-03-07 | 2016-09-21 | 安徽云天冶金科技股份有限公司 | High-fire-proof slag-stopping ball used for converter steelmaking and preparation method thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140917 |