CN1375478A - Stirred magnesia-water mixture for repairing furnace lining and its usage - Google Patents
Stirred magnesia-water mixture for repairing furnace lining and its usage Download PDFInfo
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- CN1375478A CN1375478A CN 02115420 CN02115420A CN1375478A CN 1375478 A CN1375478 A CN 1375478A CN 02115420 CN02115420 CN 02115420 CN 02115420 A CN02115420 A CN 02115420A CN 1375478 A CN1375478 A CN 1375478A
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Abstract
The composition of the water stirring material for repairing furnace lining of steel-smelting furnace comprises 90-97% of magnesium oxide, 2-8% of dichromium trioxide, 0.5-1.0 % of suspending agent, 0.1-1.0% of hydration-resisting agent 1.5-8% of anochoring agent and water whose content is 10-15% of total weight of said materials, said materials are mixed into mud material, and placed into a watertight bag for stand-by. Its use method includes: after the steel-tapping is completed, shaking furnace for several time to form slag-hanging isolating layer, cleaning slag, retaining furnace temp. at 800-1400 deg.C, pouring said water-stirring material into the furnace, turning furnace to make the water-stirring material uniformly spread in the furnace and standing still for 60-80 min.
Description
One, technical field
The present invention relates to the repair material and the using method thereof of steel melting furnace furnace lining.
Two, technical background
At present, in 50～250 tons and above steel-making converter furnace lining, the preceding big face of hot metal charging side and tapping side back big is the weakest place in the whole furnace lining.Because preceding big the intense impact that will bear molten iron and steel scrap easily peeled off the interior refractory materials of stove, form serious big area pit; The big face in back will bear 1650～1720 ℃ of high-temperature molten steels and oxidisability slag and soak for a long time then because in tapping process, furnace lining is easily weathered and attenuation, thereby influenced the work-ing life of steel-making converter greatly.Be head it off, adopt gunning technology and Technology of Slag Splashingfor Furnace Maintenance both at home and abroad mostly.Adopting its deficiency of gunning technology is that the repairing time is long, generally needs 90 fens clock times.Adopt Technology of Slag Splashingfor Furnace Maintenance, its deficiency to be owing to can not guarantee to need mend and do not need the planeness of mend, thus still be the ground of weakness, and the repair material wastage reaches about 10%.Also have and adopt the tar rhombspar to repair stove, but because tar can produce strong yellow flue dust when burning, severe contamination and influence operating environment, the harm operator are healthy, and after the tar burning, can produce many cavities, thereby reduced the compactness of fettling layer, the fettling layer is peeled off, very the large area caving of fettling layer can appear in the person.
Three, technology contents
In order to overcome above-mentioned deficiency, the invention provides a kind of mending material in stove, expand good fluidity, repair smooth, fettling layer cohesive strength big, dross and tack time is short, quality is good, stirred magnesia-water mixture for repairing furnace lining simple to operate and using method thereof.
Its technical measures:
Stirred magnesia-water mixture for repairing furnace lining, it is characterized in that composition is (weight ratio): magnesium oxide is between 90～95%, chromium sesquioxide is between 2～5%, suspension agent is between 0.5～1.0%, and the preventing hydration agent is between 0.1～1.0%, and wedding agent is between 1.5～8%, in order to make the good fluidity of stirred magnesia-water mixture for repairing furnace lining, in the time will repairing stove, mix with it and stir into muddy by 10～15% Jia Shui of above-mentioned whole material gross weights, after pack into watertight stand-by in bag weaved.
In order to guarantee to repair the cohesiveness and the ventilation property of back furnace lining, so be to magnesian granularity requirements: below 2 millimeters account for 60%, 2～4 millimeters account for 40%.
The using method of stirred magnesia-water mixture for repairing furnace lining, its step is as follows:
A, will stir into muddy, the good fluidity when guaranteeing that it is repaired with the stirred magnesia-water mixture for repairing furnace lining that water mixes by a certain percentage;
Shake its stove for several times after b, tapping finish, adjust residue viscosity, and form mend dross sealing coat, directly contact with furnace lining MgO-C flame retardant coating not make the moisture in the stirred magnesia-water mixture for repairing furnace lining with assurance.And it is the recrement full scale clearance is clean.
C, remain in furnace temperature under 800～1400 ℃ the condition, stir and place the stirred magnesia-water mixture for repairing furnace lining of certain hour together with the bag weaved hole recess of waiting to repair in the stove of pouring into mixing, and shake stove, stirred magnesia-water mixture for repairing furnace lining is sprawled in stove evenly.Bag weaved also pouring into simultaneously waited to repair in the stove, not only can not become impurity, but become the aggregate of furnace lining;
60～80 fens clock times are left standstill in d, the converter of completing stirred magnesia-water mixture for repairing furnace lining.It mainly makes high-temperature residual heat by refractory materials in the stove through thermal radiation and conduction, and the moisture evaporation in the stirred magnesia-water mixture for repairing furnace lining is fallen, and reaches the agglomerating purpose;
When the area of repairing when need is very big, and the stirred magnesia-water mixture for repairing furnace lining of pouring into more for a long time, for remedying the furnace wall cooling, can adopt coaloust-oxygen gun to vulcanize burning treating that mend adds, and to promote that stirred magnesia-water mixture for repairing furnace lining condenses fully, be 30～40 minutes its combustion time.
The repairing time of the present invention is short, and than adopting the spray repair fettling will shorten more than 20 minutes, sintering strength can reach 30 MPas, and the prosthetic portion planarization is good, can not produce the wasting phenomenon of mending material.
Four, specific embodiments
When the big face of preceding big face or back of converter suffers that damage needs to repair, adopt stirred magnesia-water mixture for repairing furnace lining, its weight item ratio is: magnesium oxide 91%, chromium sesquioxide 3.5%, suspension agent 0.6%, preventing hydration agent 0.4%, silicate 5.5%, add 12% water and mix with it and stir into muddy, after pack into watertight bag weaved in.Magnesian granularity is: below 2 millimeters account for 60%, 2～4 millimeters account for 40%.
The using method of stirred magnesia-water mixture for repairing furnace lining, its step is as follows:
A, the above-mentioned stirred magnesia-water mixture for repairing furnace lining that mixes was by a certain percentage placed 2 hours by setting-up time;
Shake after b, converter tapping finish its converter with about 10 times, guaranteeing to adjust residue viscosity, and formation dross sealing coat directly contacts with furnace lining MgO-C flame retardant coating not make the moisture in the stirred magnesia-water mixture for repairing furnace lining.And it is the recrement full scale clearance is clean.
C, converter furnace temperature remain on about 1000 ℃, and the stirred magnesia-water mixture for repairing furnace lining that mixes stirring together with the bag weaved hole recess of waiting to repair in the converter of pouring into, and is rotated about 10 times of converter, and stirred magnesia-water mixture for repairing furnace lining is sprawled in stove evenly.
70 fens clock times are left standstill in d, the converter of completing stirred magnesia-water mixture for repairing furnace lining.It mainly makes high-temperature residual heat by refractory materials in the converter through thermal radiation and conduction, and the moisture evaporation in the stirred magnesia-water mixture for repairing furnace lining is fallen, and reaches the agglomerating purpose;
When the area of repairing when need is very big, and the stirred magnesia-water mixture for repairing furnace lining of pouring into is more, when temperature drops to below 900 ℃ in the stove, for remedying the furnace wall cooling, can adopt coaloust-oxygen gun to vulcanize burning treating that mend adds, to promote that stirred magnesia-water mixture for repairing furnace lining condenses fully, be about 35 minutes its combustion time.
Claims (7)
1, stirred magnesia-water mixture for repairing furnace lining, it is characterized in that composition is (weight ratio): magnesium oxide is between 90～95%, chromium sesquioxide is between 2～5%, suspension agent is between 0.5～1.0%, the preventing hydration agent is between 0.1～1.0%, wedding agent mixes with it and stirs into muddy by 10～15% Jia Shui of above-mentioned whole material gross weights between 1.5～8%, after pack into watertight bag weaved stand-by.
2, stirred magnesia-water mixture for repairing furnace lining according to claim 1 is characterized in that adding 10～15% water and mixes with its stirred magnesia-water mixture for repairing furnace lining, is just to carry out when wanting fettling.
3, stirred magnesia-water mixture for repairing furnace lining according to claim 1 is characterized in that the water addition ratio example is relevant with envrionment temperature, and the water addition ratio example is got low value when envrionment temperature is low, and the water addition ratio example is got high value when envrionment temperature is high.
4, stirred magnesia-water mixture for repairing furnace lining according to claim 1 is characterized in that magnesian granularity requirements is: below 2 millimeters account for 60%, 2～4 millimeters account for 40%.
5, stirred magnesia-water mixture for repairing furnace lining according to claim 1, its add-on is in 5～7% scopes when adopting silicate to it is characterized in that wedding agent, and during for phosphoric acid salt, its add-on is in 4～8 scopes, during for resin, its add-on is in 1.5～5% scopes.
6, the using method of stirred magnesia-water mixture for repairing furnace lining, its step is as follows:
A, aforementioned material is mixed by a certain percentage with water, and stir into muddy
Shake its rocking furnace subnumber after b, converter tapping finish, form the dross sealing coat, and recrement is removed clean;
C, remain in the converter furnace temperature under 800～1400 ℃ the condition, pour the hole recess of waiting to repair in the converter with being mixed into slimy stirred magnesia-water mixture for repairing furnace lining into together with bag weaved, and shake converter;
60～80 fens clock times are left standstill in d, the converter that will complete stirred magnesia-water mixture for repairing furnace lining.
7, the using method of stirred magnesia-water mixture for repairing furnace lining according to claim 6, it is characterized in that when the area that needs to repair is very big, and the stirred magnesia-water mixture for repairing furnace lining of pouring into more for a long time, can adopt coaloust-oxygen gun to vulcanize burning treating that mend adds, and be 30～40 minutes its combustion time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021154201A CN1152840C (en) | 2002-01-10 | 2002-01-10 | Stirred magnesia-water mixture for repairing furnace lining and its usage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021154201A CN1152840C (en) | 2002-01-10 | 2002-01-10 | Stirred magnesia-water mixture for repairing furnace lining and its usage |
Publications (2)
| Publication Number | Publication Date |
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| CN1375478A true CN1375478A (en) | 2002-10-23 |
| CN1152840C CN1152840C (en) | 2004-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021154201A Expired - Fee Related CN1152840C (en) | 2002-01-10 | 2002-01-10 | Stirred magnesia-water mixture for repairing furnace lining and its usage |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387732C (en) * | 2006-02-14 | 2008-05-14 | 东北大学 | Harmless resource utilization method for chromic slag |
| CN101747064A (en) * | 2008-11-29 | 2010-06-23 | 郑州东方三力耐火材料有限公司 | Novel converter thermal-state artesian repairing material |
| CN101357849B (en) * | 2007-08-03 | 2011-07-27 | 上海盛江特种耐火材料厂 | Improved carbonaceous mud for patching blast furnace hearth |
| CN102180692A (en) * | 2011-03-11 | 2011-09-14 | 攀钢冶金材料有限责任公司 | Method for preparing converter repairing material from Al2O3-MgO-CaO synthetic fireproof raw material |
| CN101618967B (en) * | 2008-07-02 | 2012-01-04 | 北京瑞普同创科技发展有限公司 | Dry coke quenching furnace circular passage tilt channel regional patching material |
| CN108530038A (en) * | 2018-06-08 | 2018-09-14 | 大冶有色金属有限责任公司 | A kind of anode furnace furnace bottom shield lining composition |
| CN114685146A (en) * | 2022-04-29 | 2022-07-01 | 河南机电职业学院 | Converter repairing mass prepared from waste magnesium saggars and using method |
-
2002
- 2002-01-10 CN CNB021154201A patent/CN1152840C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387732C (en) * | 2006-02-14 | 2008-05-14 | 东北大学 | Harmless resource utilization method for chromic slag |
| CN101357849B (en) * | 2007-08-03 | 2011-07-27 | 上海盛江特种耐火材料厂 | Improved carbonaceous mud for patching blast furnace hearth |
| CN101618967B (en) * | 2008-07-02 | 2012-01-04 | 北京瑞普同创科技发展有限公司 | Dry coke quenching furnace circular passage tilt channel regional patching material |
| CN101747064A (en) * | 2008-11-29 | 2010-06-23 | 郑州东方三力耐火材料有限公司 | Novel converter thermal-state artesian repairing material |
| CN102180692A (en) * | 2011-03-11 | 2011-09-14 | 攀钢冶金材料有限责任公司 | Method for preparing converter repairing material from Al2O3-MgO-CaO synthetic fireproof raw material |
| CN102180692B (en) * | 2011-03-11 | 2013-03-20 | 攀钢冶金材料有限责任公司 | Method for preparing converter repairing material from Al2O3-MgO-CaO synthetic fireproof raw material |
| CN108530038A (en) * | 2018-06-08 | 2018-09-14 | 大冶有色金属有限责任公司 | A kind of anode furnace furnace bottom shield lining composition |
| CN114685146A (en) * | 2022-04-29 | 2022-07-01 | 河南机电职业学院 | Converter repairing mass prepared from waste magnesium saggars and using method |
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| Publication number | Publication date |
|---|---|
| CN1152840C (en) | 2004-06-09 |
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Granted publication date: 20040609 Termination date: 20140110 |