CN1241637A - Compound scorifying agent - Google Patents
Compound scorifying agent Download PDFInfo
- Publication number
- CN1241637A CN1241637A CN99115048A CN99115048A CN1241637A CN 1241637 A CN1241637 A CN 1241637A CN 99115048 A CN99115048 A CN 99115048A CN 99115048 A CN99115048 A CN 99115048A CN 1241637 A CN1241637 A CN 1241637A
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- CN
- China
- Prior art keywords
- light
- composite fluxing
- fluxing medium
- slag
- 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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- 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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- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to one kind of compound slagging constituent for converter. The compound slagging constituent contains steel-smelting sludge 10-70 wt% and light-burned magnesia 30-90 wt% as well as silicious fine powder 1-8 wt%, light calcium carbonate 6-8 wt% and other matter 0-5 wt%. It is easy to melt, has comprehensive functions and high utilization, and may be used to protect furnace lining effectively.
Description
The invention belongs to the converter steelmaking field of pig iron processing treatment, be specifically related to a kind of converter steelmaking composite fluxing medium.
The slag making operation of converter steelmaking is the key operation of converter steelmaking, directly has influence on the quality of steel-making quality.Existing slag making is of a great variety with supplementary material, and people use materials such as lime, light dolomite, iron scale, fluorite and calcined magnesite ball to make slag former usually aborning.The slag making effect is not ideal enough, and the utilization ratio of supplementary material is also lower, often causes waste.And also there is certain deficiency in above-mentioned slag making with supplementary material self: fluorite and iron scale all easily corrode furnace lining, thereby reduce the work-ing life of converter; Light dolomite or calcined magnesite ball can not fully be melted in the slag in converter; Though lime can be removed the impurity such as P.S in the molten steel, slagging is many, and slag easily sticks on and corrodes furnace lining on the furnace lining, the work-ing life of equally also having reduced converter.Moreover the accessory substance mud of producing in the converter steelmaking does not have recycling or carries out other processing, put together but directly build, and not only influence and contaminate environment, and also some useful matter in the mud do not obtain reasonable use, is a kind of waste yet.
The objective of the invention is at the above-mentioned defective and the deficiency that exist in the prior art, a kind of fusing that is easy to is provided, complete function, raw material availability height, thereby effectively furnace retaining, raising furnace life, and the composite fluxing medium that can utilize again steel-smelting sewage sludge.
Technical scheme of the present invention is as follows:
A kind of composite fluxing medium, it contains following composition (weight percent): steel-smelting sewage sludge 10%-70%, light-burning magnesium powder 30%-90%.Also can contain (weight percent) silicon powder 1%-8%, light calcium carbonate 6%-8%, other content is greater than 0% and be less than or equal to 5%.This composite fluxing medium is the particulate state that granularity is 2mm-8mm.
This composite fluxing medium is that the accessory substance mud with converter steelmaking is main raw material, stirs through mixing and water adding with addition of raw materials such as light-burning magnesium powder, light calcium carbonate and silicon powders and makes the particulate state that granularity is 2-80mm (comprising all kinds of shapes such as spherical, square shape, ellipticity) after trembling.The main chemical compositions of composite fluxing medium is: MgO, CaO, FeO and SiO2, and wherein MgO content (weight percent) is 10%-60%, CaO content (weight percent) is 5%-30%.
The mud that the present invention selects for use is the accessory substance that converter steelmaking produced, and it contains abundant lime (be CaO, its weight accounts for the 30%-40% of mud weight).
Light-burning magnesium powder can melt rapidly in stove, can reduce the content of low melting point calcium ferrite, and generate dystectic magnesium ferrite, thereby reach the purpose of protecting furnace lining.
Silicon powder can transform the content of calcium in the converter, generates Dicalcium Phosphate (Feed Grade) and tricalcium silicate, can protect furnace lining equally.
This composite fluxing medium is made into the particulate state that granularity is 2mm-8mm, can avoid composite fluxing medium to be discharged out of the furnace by furnace pressure because of granularity is too little, perhaps can not fully melt the generation of situation too greatly because of granularity, can play one's part to the full in stove.
Compare with existing slag former, composite fluxing medium of the present invention has the following advantages:
1. the light-burning magnesium powder selected for use of the present invention, be easy to fusing, can improve MgO content in slag rapidly, and ingredient stability, can overcome light dolomite and calcined magnesite ball and not change the defective of slag, reduce the content of FeO, this composite fluxing medium can replace light dolomite and calcined magnesite ball fully, reaches in smelting process the maintenance of converter lining and the purpose of slag splashing.
2. plurality of raw materials is used simultaneously, has not only comprised the function of existing slag former, but also has overcome the detrimentally affect that the made slag former of a certain raw material of independent use brings, and is the high compound slag making materials of a kind of complete function and utilization ratio.
3. can replace fluorite or iron scale to help slag to melt, and not have fluorite or iron scale easily corrodes the negative effect of furnace lining, prolong the effect of converter lining life thereby played indirectly, and can reach equal change slag effect.
4. the present invention makes full use of the mud that steel-making produces: (weight percentage of CaO is 5%-30%) thoroughly turns waste into wealth, not only help curbing environmental pollution, and with the resource recycling, improve the utilization ratio of resource, all right part replacing lime helps the removal of molten steel P.S, reduce lime consumption, and then reduce production costs.
Prove after tested, in convertor steelmaking process, add this composite fluxing medium of 8-15kg/t, and do not adding under any magnesian, can make MgO content increase 7%-10% (weight percentage) in the finishing slag, lime consumption reduces 5-10kg/t, can realize not adding simultaneously oxidation iron sheet or fluorite and can assuranceization slag excellent metallurgical effect.
Embodiment: (being example all) with preparation 1kg composite fluxing medium
Example 1: get steel-smelting sewage sludge 0.30kg, light-burning magnesium powder 0.60kg, silicon powder 0.01kg, light calcium carbonate 0.06kg, other 0.03kg mixes and adds and makes the spherical particle that granularity is 2mm after water stirs.
Example 2: get steel-smelting sewage sludge 0.50kg, light-burning magnesium powder 0.30kg, silicon powder 0.07kg, light calcium carbonate 0.08kg, other 0.05kg mixes and adds and makes the square particle that granularity is 40mm after water stirs.
Example 3: get steel-smelting sewage sludge 0.40kg, light-burning magnesium powder 0.50kg, silicon powder 0.01kg, light calcium carbonate 0.07kg, other 0.02kg mixes and adds and makes the ellipticity particle that granularity is 80mm after water stirs.
Example 4: get steel-smelting sewage sludge 0.10kg, light-burning magnesium powder 0.90kg mixes and adds and makes the ellipticity particle that granularity is 40mm after water stirs.
Claims (3)
1. composite fluxing medium is characterized in that it contains following composition (weight percent): steel-smelting sewage sludge 10%-70%, light-burning magnesium powder 30%-90%.
2. a kind of composite fluxing medium according to claim 1 is characterized in that also can containing (weight percent) silicon powder 1%-8%, light calcium carbonate 6%-8%, and other content is greater than 0% and be less than or equal to 5%.
3. a kind of composite fluxing medium according to claim 1 is characterized in that this composite fluxing medium is that granularity is the particulate state of 2mm-8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991150481A CN1140637C (en) | 1999-07-29 | 1999-07-29 | Compound scorifying agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB991150481A CN1140637C (en) | 1999-07-29 | 1999-07-29 | Compound scorifying agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1241637A true CN1241637A (en) | 2000-01-19 |
| CN1140637C CN1140637C (en) | 2004-03-03 |
Family
ID=5278069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB991150481A Expired - Fee Related CN1140637C (en) | 1999-07-29 | 1999-07-29 | Compound scorifying agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1140637C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1659190A3 (en) * | 2004-11-17 | 2009-05-20 | ISM Inc. | A slag conditioner composition, process for manufacture and method of use in steel production |
| CN109338039A (en) * | 2018-12-05 | 2019-02-15 | 钢城集团凉山瑞海实业有限公司 | A kind of steelmaking converter slag former and preparation method thereof |
-
1999
- 1999-07-29 CN CNB991150481A patent/CN1140637C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1659190A3 (en) * | 2004-11-17 | 2009-05-20 | ISM Inc. | A slag conditioner composition, process for manufacture and method of use in steel production |
| US7914599B2 (en) | 2004-11-17 | 2011-03-29 | Ism, Inc. | Slag conditioner composition, process for manufacture and method of use in steel production |
| CN109338039A (en) * | 2018-12-05 | 2019-02-15 | 钢城集团凉山瑞海实业有限公司 | A kind of steelmaking converter slag former and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1140637C (en) | 2004-03-03 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040303 Termination date: 20100729 |