CN103771870A - Preparation method of tundish dry working lining - Google Patents
Preparation method of tundish dry working lining Download PDFInfo
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- CN103771870A CN103771870A CN201210404879.7A CN201210404879A CN103771870A CN 103771870 A CN103771870 A CN 103771870A CN 201210404879 A CN201210404879 A CN 201210404879A CN 103771870 A CN103771870 A CN 103771870A
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Abstract
The invention discloses a preparation method of a tundish dry working lining. The preparation method comprises the following steps of 1, putting 18-22 parts of fused magnesia having the particle sizes of 3-1mm, 30-32 parts of fused magnesia having the particle sizes of 1-0.074mm and 8-10 parts of fused magnesia having the particle sizes less than 0.074mm into a mixer, carrying out mixing for 3-5min, adding 4-6 parts of maltose into the mixture, carrying out mixing for 3-5min, adding 6-10 parts of MgO-CaO clinker having the particle size of 0.5-0.074mm, 4-6 parts of bentonite and 1-2 parts of boron nitride into the mixture, carrying out mixing for 15-20min and discharging the mixture, and 2, carrying out blank film vibration molding on the mixture obtained by the step 1, carrying out baking at a temperature of 150-170 DEG C and carrying out demolding.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, relate in particular to a kind of preparation method of dry working lining.
Background technology
Tundish is the intermediate store that in steel-making continuous casting production process, molten steel is diverted to crystallizer from ladle, most important with many stoves continuous casting to guaranteeing clean steel-making.Tundish plays important effect by the quality stable and raising continuous casting steel that the quality of refractory quality flows inclusion, the maintenance steel got rid of in molten steel.To bakie working lining with the requirement of refractory materials be: resistance to erosion, antiscour, good heat insulation, does not pollute molten steel, is easy to construction and takes off bag etc.
At present, liner in dundish changes magnesia, the calcareous unshape refractory of magnesium into by silica heat-insulating plate, form of construction work by build by laying bricks or stones change into manual smear, mechanically spraying, along with quoting of Quick changing gate technology, developed tundish dry vibratory material, for example:
" alkaline dry liner for intermediate ladle of continuous casting " (CN 01115190.0) technology, it is the unsetting composition take magnesia as main body, its component is percentage composition meter by weight: magnesia 85-95%, boride 0.5-3.0%, thermoplastic material 2-10%, phosphoric acid salt 1-3%, fluorochemical 1-3%;
" the calcareous dry-type working lining of a kind of novel tundish magnesium " (CN 02117935.2) technology, take synthetic magnesia-calcium clinker, passivation dolomite sand, passive lime stone sand, calcination dolomite sand, lime kilning stone sand etc. as calcareous raw material, take iron scale, clay, silicon powder etc. as sintering aid, take resin, malt sugar, PVC as bonding agent, through evenly mixing and make in formula inner lining material, at the scene by the construction of tundish mould tire, and with 150-350 ℃ of baking 1-3 hour, take off mould tire, working lining;
" continuous casting liner in dundish " (CN02116839.3) technology, magnesia 80-95%, alumina 1-10% soft clay 1-5%, organic thermoplastic compound 2-15%;
" a kind of novel dry working lining " (CN1459345A) and " a kind of continuous casting with tundish dry vibratory material and preparation method thereof " (CN200410061192.3) technology, take magnesia, olivine sand, synthetic magnesia-calcium clinker, passivation dolomite sand, calcination olivine sand as basic raw material, take Tai-Ace S 150, polymerize aluminum chloride, halogen, water glass and a small amount of phosphoric acid salt etc. as bonding agent, take iron scale, clay, silicon powder as sintering aid, through evenly mixing and make dry type inner lining material;
" a kind of centre is wrapped in the preparation method of formula vibration material " (CN1821178A) technology, take magnesia or forsterite as basic raw material, take Starso as bonding agent, through evenly mixing and make dry type inner lining material.
The above-mentioned dry materials of making bonding agent with resol, owing to not generating a large amount of eutectics under not moisture and high temperature, extends work-ing life.But resol price is higher on the one hand, makes dry materials cost higher; In bake process, have on the other hand the generations such as irritant gas ammonia, formaldehyde, contaminate environment, the carbon after resin charing, the obvious carburetting of Hydrogen Energy increase hydrogen.And dry materials take phosphoric acid salt, oxymuriate, vitriol as bonding agent has strong and stimulating γ-ray emission, contaminate environment in baking or use procedure.And dry materials take Starso as bonding agent is due to the existing of strong flux sodium oxide, and the work-ing life of remarkably influenced material and disintegration performance.
" a kind of preparation method of dry working lining " (CN101077523) technology discloses: a kind of preparation method of dry working lining, its by weight percentage content the magnesia of 85-95% is mixed with glucose or the citric acid of 5-15%, after stirring, adopt the vibratory compaction of mould tire, 200-400 ℃ of baking, after the demoulding, obtain dry working lining.Although the problem of polluting has been avoided in this patent application, because component is too simple, causes the strength decreased of tundish.
Summary of the invention
The object of the invention is to propose a kind of preparation method of dry working lining, this vibration material has no irritating odor, not can to molten steel recarburization increase hydrogen, erosion-resisting characteristics good, disintegrate easily, and intensity is high.
For reaching this object, the present invention by the following technical solutions:
A kind of preparation method of tundish dry vibratory material, this vibration material is made up of following component in weight part: 3-1mm electrosmelted magnesite clinker 18-22 part, 1mm-0.074mm electrosmelted magnesite clinker 30-32 part, < 0.074mm electrosmelted magnesite clinker 8-10 part, 0.5mm-0.074mm calcium magnesia sand 6-10 part, wilkinite 4-6 part, boron nitride 1-2 part, maltose 4-6 part, in described calcium magnesia sand, CaO content is 45-55%, described preparation method is:
1) electrosmelted magnesite clinker is weighed to proportioning by above-mentioned grain size distribution, then add in stirrer, mix 3-5 minute, then add maltose mixing 3-5 minute, add calcium magnesia sand, wilkinite and boron nitride, remix 15-20 minute discharging;
2) adopt fetal membrane vibratory compaction, 150-170 ℃ of baking, the demoulding obtains tundish dry vibratory material.
The present invention has following beneficial effect:
1) the present invention is on the basis of great many of experiments, by the grain size distribution to electrosmelted magnesite clinker and add appropriate calcium magnesia sand and boron nitride, coordinates as bonding agent using wilkinite and maltose in addition, and the strength ratio prior art of vibration material is improved more than 40%.
2) preparation method of the present invention is not by all component mixed once, but adopts the batch mixing order of above-mentioned uniqueness, makes the combination better effects if of Starso and wilkinite and each component, thereby has guaranteed the intensity of dry-type vibration material.
3) maltose that the present invention adopts can cold melt in bake process, makes dry materials produce intensity with the temperature continuous polymerization that raises; To compare be the hydrocarbon oxygen compound of molecular weight for maltose and resol in addition, and easy oxidized eliminating in bake process does not have irritant gas to produce yet.So the dry materials obtaining is not easy to increase hydrogen to molten steel recarburization, and erosion-resisting characteristics is good, be also easy to disintegrate, environmental friendliness.
Embodiment
Embodiment mono-
A kind of preparation method of tundish dry vibratory material, this vibration material is made up of following component in weight part: 18 parts of 3-1mm electrosmelted magnesite clinkers, 1mm-0.074mm 32 parts of electrosmelted magnesite clinkers, 8 parts of < 0.074mm electrosmelted magnesite clinkers, 10 parts of 0.5mm-0.074mm calcium magnesia sands, 4 parts of wilkinites, 2 parts of boron nitride, 4 parts of maltose, in described calcium magnesia sand, CaO content is 45-55%, described preparation method is:
1) electrosmelted magnesite clinker is weighed to proportioning by above-mentioned grain size distribution, then add in stirrer, mix 3 minutes, then add maltose to mix 5 minutes, add calcium magnesia sand, wilkinite and boron nitride, remix discharging in 15 minutes;
2) adopt fetal membrane vibratory compaction, 150 ℃ of bakings, the demoulding obtains tundish dry vibratory material.
Embodiment bis-
A kind of preparation method of tundish dry vibratory material, this vibration material is made up of following component in weight part: 22 parts of 3-1mm electrosmelted magnesite clinkers, 1mm-0.074mm 30 parts of electrosmelted magnesite clinkers, 10 parts of < 0.074mm electrosmelted magnesite clinkers, 6 parts of 0.5mm-0.074mm calcium magnesia sands, 6 parts of wilkinites, 1 part of boron nitride, 6 parts of maltose, in described calcium magnesia sand, CaO content is 45-55%, described preparation method is:
1) electrosmelted magnesite clinker is weighed to proportioning by above-mentioned grain size distribution, then add in stirrer, mix 5 minutes, then add maltose to mix 3 minutes, add calcium magnesia sand, wilkinite and boron nitride, remix discharging in 20 minutes;
2) adopt fetal membrane vibratory compaction, 170 ℃ of bakings, the demoulding obtains tundish dry vibratory material.
Embodiment tri-
A kind of preparation method of tundish dry vibratory material, this vibration material is made up of following component in weight part: 20 parts of 3-1mm electrosmelted magnesite clinkers, 1mm-0.074mm 31 parts of electrosmelted magnesite clinkers, 9 parts of < 0.074mm electrosmelted magnesite clinkers, 8 parts of 0.5mm-0.074mm calcium magnesia sands, 5 parts of wilkinites, 1.5 parts of boron nitride, 5 parts of maltose, in described calcium magnesia sand, CaO content is 45-55%, described preparation method is:
1) electrosmelted magnesite clinker is weighed to proportioning by above-mentioned grain size distribution, then add in stirrer, mix 4 minutes, then add maltose to mix 4 minutes, add calcium magnesia sand, wilkinite and boron nitride, remix discharging in 18 minutes;
2) adopt fetal membrane vibratory compaction, 160 ℃ of bakings, the demoulding obtains tundish dry vibratory material.
Claims (1)
1. the preparation method of a tundish dry vibratory material, it is characterized in that, this vibration material is made up of following component in weight part: 3-1mm electrosmelted magnesite clinker 18-22 part, 1mm-0.074mm electrosmelted magnesite clinker 30-32 part, < 0.074mm electrosmelted magnesite clinker 8-10 part, 0.5mm-0.074mm calcium magnesia sand 6-10 part, wilkinite 4-6 part, boron nitride 1-2 part, maltose 4-6 part, in described calcium magnesia sand, CaO content is 45-55%, and described preparation method is:
1) electrosmelted magnesite clinker is weighed to proportioning by above-mentioned grain size distribution, then add in stirrer, mix 3-5 minute, then add maltose mixing 3-5 minute, add calcium magnesia sand, wilkinite and boron nitride, remix 15-20 minute discharging;
2) adopt fetal membrane vibratory compaction, 150-170 ℃ of baking, the demoulding obtains tundish dry vibratory material.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210404879.7A CN103771870A (en) | 2012-10-22 | 2012-10-22 | Preparation method of tundish dry working lining |
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| CN201210404879.7A CN103771870A (en) | 2012-10-22 | 2012-10-22 | Preparation method of tundish dry working lining |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862547A (en) * | 2017-02-28 | 2017-06-20 | 山东钢铁股份有限公司 | A kind of bakie working lining inner lining structure for adsorbing inclusion content in melting steel |
| CN112194465A (en) * | 2020-10-12 | 2021-01-08 | 北京利尔高温材料股份有限公司 | Tundish dry material and preparation method thereof |
| CN112500135A (en) * | 2021-02-05 | 2021-03-16 | 北京利尔高温材料股份有限公司 | Magnesium-calcium tundish dry working lining material and preparation method thereof |
-
2012
- 2012-10-22 CN CN201210404879.7A patent/CN103771870A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106862547A (en) * | 2017-02-28 | 2017-06-20 | 山东钢铁股份有限公司 | A kind of bakie working lining inner lining structure for adsorbing inclusion content in melting steel |
| CN106862547B (en) * | 2017-02-28 | 2019-04-23 | 山东钢铁股份有限公司 | A kind of bakie working lining inner lining structure adsorbing inclusion content in melting steel |
| CN112194465A (en) * | 2020-10-12 | 2021-01-08 | 北京利尔高温材料股份有限公司 | Tundish dry material and preparation method thereof |
| CN112194465B (en) * | 2020-10-12 | 2022-06-17 | 北京利尔高温材料股份有限公司 | Tundish dry material and preparation method thereof |
| CN112500135A (en) * | 2021-02-05 | 2021-03-16 | 北京利尔高温材料股份有限公司 | Magnesium-calcium tundish dry working lining material and preparation method thereof |
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Application publication date: 20140507 |