CN101054611A - Slag removing and furnace protecting agent - Google Patents
Slag removing and furnace protecting agent Download PDFInfo
- Publication number
- CN101054611A CN101054611A CN 200710052246 CN200710052246A CN101054611A CN 101054611 A CN101054611 A CN 101054611A CN 200710052246 CN200710052246 CN 200710052246 CN 200710052246 A CN200710052246 A CN 200710052246A CN 101054611 A CN101054611 A CN 101054611A
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- Prior art keywords
- slag
- furnace
- protecting agent
- solving
- slag removing
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Abstract
A slag-adjusted furnace-protected agent is composed by the following substances in percentage, 45-80% MgO2, 6-22% CaO, 6-22% C, 5-12% Al2O3 and 1-4% rhenium. The agent is prepared by taking the above raw materials in proportion, mixing them uniformly and molding and forming particles in a granulator to produce spheroids with the diameter of 10-13mm. The invention has the advantages of (1) solving the problem of spraying before smelting; (2) solving the problem of corroding to the furnace lining of the slag during smelting; (3) solving the problem of absorbing liquid steel impurities of the slag; (4) prolonging the service life of the steel-tapping hole bushing and (5) improving the efficiency of slag adjusting and furnace protecting.
Description
Technical field
The present invention relates to the adjustment of converter steelmaking slag system, particularly a kind of slag removing and furnace protecting agent.
Background technology
Converter steelmaking early stage (end) slag and the terminal point slag oxidation is strong, content of magnesia is low, to have influence on and smelt the splash in early stage, smelting process slag action furnace lining, and the effect of slag splashing, the work-ing life and the strong slag of tap hole life-span, particularly oxidisability of shortening furnace lining, absorption molten steel folder thing poor performance, slag easily causes secondary oxidation of steel under tapping process, and the oxide inclusion in the molten steel increases, and has influence on the purity and the quality of molten steel.Be to take the suitable adding of smelting process to contain magnesium material only to improve magnesian content in the slag in the past, but can not reduce slag oxidation, the slag splashing effect is not good.
Summary of the invention
Purpose of the present invention provides a kind of slag removing and furnace protecting agent, and it can solve or slow down the smelting splash in earlier stage that exists in the converter smelting, and slag prolongs the work-ing life of tap hole sleeve pipe and furnace lining to the erosion of furnace lining in the smelting process.
The present invention is achieved like this; it is made up of the raw material of following weight percentage; magnesium oxide 45-80%, calcium oxide 6-22%, carbon 5-20%, aluminium sesquioxide 5-12% and rhenium 1-4%; its preparation method is: take by weighing above raw material in proportion; mix; molding, granulating in tablets press, making diameter is the 10-13mm spherule.
Advantage of the present invention is: (1) has solved the splash problem of smelting early stage; (2) solved the erosion problem of smelting process slag to furnace lining; (3) solved slag absorption molten steel Inclusion Problem; (4) prolong tap hole sleeve pipe work-ing life; (5) improved the validity of slag splashing.
Embodiment
Embodiment 1: gets magnesium oxide 45kg, calcium oxide 6kg, carbon 5kg, aluminium sesquioxide 5kg, rhenium 1kg, mixes, and in grain-making machine, moulding choosing grain, making diameter is the 10-13mm spherule.
Embodiment 2: gets magnesium oxide 80kg, calcium oxide 22kg, carbon 20kg, aluminium sesquioxide 12kg, rhenium 4kg, mixes, and in grain-making machine, moulding choosing grain, making diameter is the 10-13mm spherule.
Embodiment 3: gets magnesium oxide 62.5kg, calcium oxide 14kg, carbon 12.5kg, aluminium sesquioxide 8.5kg, rhenium 2.5kg, mixes, and in grain-making machine, moulding choosing grain, making diameter is the 10-13mm spherule.
Using method: the first step, furnace top bin adds.Be transported to furnace top bin by belt.The converter operative employee controls the adding of slag removing and furnace protecting agent.Converter smelting begins, and with 5～15% slag removing and furnace protecting agents of first lime adding amount of lime, look the adjustment of lime grade concrete the adding; Converter smelting 5～6 minutes, it is small quantities of to add slag removing and furnace protecting agent two again, every crowd of 50～150kg; Smelt latter stage, add slag removing and furnace protecting agent 100～300kg, concrete add-on is looked the decision of slag oxidation magnesium, in the hope of reaching finishing slag magnesium oxide 8～11%; During the slag splashing, look slag fluidity and add in right amount.Second step: the artificial input.Pouch is packed behind the converter stove, is jettisoninged by furnace superintendent or blast-furnace man.Converter is at tapping process, and slag is pressed in early investment, middle and later periods or throw slag removing and furnace protecting agent and go into the interior tap hole top position of stove with throwing slag-blocking ball (awl).Slag removing and furnace protecting agent input amount 30～50kg.
Claims (2)
1, a kind of slag removing and furnace protecting agent is characterized in that it is made of magnesium oxide 45-80%, calcium oxide 6-22%, carbon 5-20%, aluminium sesquioxide 5-12% and rhenium 1-4% the raw material of following weight percentage.
2, the preparation method of the described slag removing and furnace protecting agent of a kind of claim 1 is characterized in that the preparation method is: takes by weighing above raw material in proportion, mixes, and molding, granulating in tablets press, making diameter is the 10-13mm spherule.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100522463A CN100526478C (en) | 2007-05-22 | 2007-05-22 | Slag removing and furnace protecting agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100522463A CN100526478C (en) | 2007-05-22 | 2007-05-22 | Slag removing and furnace protecting agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101054611A true CN101054611A (en) | 2007-10-17 |
| CN100526478C CN100526478C (en) | 2009-08-12 |
Family
ID=38794664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100522463A Expired - Fee Related CN100526478C (en) | 2007-05-22 | 2007-05-22 | Slag removing and furnace protecting agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100526478C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392097A (en) * | 2011-11-14 | 2012-03-28 | 江苏大学 | Treatment method for slag adjustment before slag splashing protection of converters |
| CN102586536A (en) * | 2012-03-27 | 2012-07-18 | 辽宁科技大学 | Converter steel-making final slag modifier utilizing magnesite tailings to serve as raw material and production method thereof |
| CN102925617A (en) * | 2012-10-31 | 2013-02-13 | 攀钢集团研究院有限公司 | Slag adjusting agent for slag-splashing converter protection of vanadium extracting converter |
| CN104099469A (en) * | 2014-06-26 | 2014-10-15 | 武汉钢铁(集团)公司 | Resource utilization method of waste magnesia powder after treating oriented silicon steel |
-
2007
- 2007-05-22 CN CNB2007100522463A patent/CN100526478C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392097A (en) * | 2011-11-14 | 2012-03-28 | 江苏大学 | Treatment method for slag adjustment before slag splashing protection of converters |
| CN102586536A (en) * | 2012-03-27 | 2012-07-18 | 辽宁科技大学 | Converter steel-making final slag modifier utilizing magnesite tailings to serve as raw material and production method thereof |
| CN102925617A (en) * | 2012-10-31 | 2013-02-13 | 攀钢集团研究院有限公司 | Slag adjusting agent for slag-splashing converter protection of vanadium extracting converter |
| CN102925617B (en) * | 2012-10-31 | 2014-12-17 | 攀钢集团研究院有限公司 | Slag adjusting agent for slag-splashing converter protection of vanadium extracting converter |
| CN104099469A (en) * | 2014-06-26 | 2014-10-15 | 武汉钢铁(集团)公司 | Resource utilization method of waste magnesia powder after treating oriented silicon steel |
| CN104099469B (en) * | 2014-06-26 | 2016-06-15 | 武汉钢铁(集团)公司 | The resource utilization method of discarded magnesia powder after orientation silicon steel heat treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100526478C (en) | 2009-08-12 |
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Legal Events
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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: 20090812 Termination date: 20130522 |