CN103100676B - A kind of continuous casting pouring basket constant staticizer and preparation method thereof - Google Patents
A kind of continuous casting pouring basket constant staticizer and preparation method thereof Download PDFInfo
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- CN103100676B CN103100676B CN201310050129.9A CN201310050129A CN103100676B CN 103100676 B CN103100676 B CN 103100676B CN 201310050129 A CN201310050129 A CN 201310050129A CN 103100676 B CN103100676 B CN 103100676B
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Abstract
The invention provides a kind of continuous casting pouring basket constant staticizer and preparation method thereof, flow straightener is made up of the top (1) of flow straightener and the bottom (2) of flow straightener, the top (1) of flow straightener is formed by the castable composite casting of unlike material respectively with the bottom (2) of flow straightener, and the present invention also provides its preparation technology. Flow straightener long service life of the present invention, cost is low, and moulding is simple, and baking time is short, has good economic benefit and social benefit.
Description
Technical field
The present invention relates to a kind of Ferrous Metallurgy flow straightener, be specifically related to a kind of continuous casting pouring basket constant staticizer, with and preparation method thereof.
Background technology
Along with the development of continuous casting technology, it is the target that each iron and steel enterprise is pursued that the steel time is drawn in raising slab quality, prolongation, the use of flow straightener is the necessary means that improves steel product quality and tundish service life, particularly odd number flows increasing of tundish application in recent years, service time to flow straightener especially, the particularly service life of flow straightener antetheca have higher requirement.
The development of fire-resistant industry in recent years, also be greatly improved the service life of continuous-casting three-main-product, be accompanied by being on the increase of odd number stream tundish, the requirement in flow straightener antetheca service life is also being improved, the flow straightener of traditional single material is in use because the continuous impact of molten steel is easily collapsed, easily sever the accidents such as stopper, while using metering nozzle to draw steel, the too fast damage of flow straightener antetheca also can be accelerated the hole enlargement at the mouth of a river, tundish centre, shorten the service life of tundish, after flow straightener antetheca damages simultaneously, molten steel also can aggravate for the erosion of the working lining of flow straightener right opposite, thereby shorten the service time of working lining, Integral lifting flow straightener materials class can overcome the above problems, but can cause the significantly increase of flow straightener cost.
Summary of the invention
In order to overcome the problems referred to above, can significantly improve the service life of flow straightener antetheca, effectively control the cost of resistance to material, the object of the present invention is achieved like this:
Continuous casting pouring basket constant staticizer feature of the present invention is as follows: flow straightener is made up of with the bottom 2 of flow straightener the top 1 of flow straightener, flow straightener top 1 formed by corundum pouring material cast, the bottom 2 of flow straightener is formed by castable cast, and height h is 150～350mm.
The described corundum pouring material for continuous casting pouring basket constant staticizer top 1, formed by following material by weight: 8～15 parts of the fused brown corundums of 8～5mm granularity, 12～18 parts of the fused brown corundums of 5～3mm granularity, 22～28 parts of the fused white corundums of 3～1mm granularity, 12～18 parts of the fused white corundums of 1～0.083mm granularity, 180 20～25 parts of order fused white corundums, 325 4～6 parts of order alumina powders, 0.8～1.2 part of silicon powder, 4.5～6 parts of pure calcium aluminate cements, 0.1～0.3 part of sodium phosphate trimer, 0.05～0.08 part of explosion-proof fiber, 0.8～1.2 part of steel fibre.
Preferably, the described corundum pouring material for continuous casting pouring basket constant staticizer top 1, formed by following material by weight percentage: 10 parts of the fused brown corundums of 8～5mm granularity, 15 parts of the fused brown corundums of 5～3mm granularity, 25 parts of the fused white corundums of 3～1mm granularity, 15 parts of the fused white corundums of 1～0.083mm granularity, 180 22 parts of order fused white corundums, 325 6 parts of order alumina powders, 1 part of silicon powder, the trade mark is 5 parts of CA70 pure calcium aluminate cements, 0.1 part of sodium phosphate trimer, 0.05 part of explosion-proof fiber, 0.85 part of steel fibre.
The described castable for continuous casting pouring basket constant staticizer bottom 2, formed by following material by weight: 8～12 parts of the highly-purity magnesites of 8～5mm granularity, 18～23 parts of the highly-purity magnesites of 5～3mm granularity, 18～23 parts of the highly-purity magnesites of 3～1mm granularity, 12～18 parts of the highly-purity magnesites of 1～0.083mm granularity, 200 25～32 parts of order fused magnesites, 2.5～4 parts of silicon powders, 0.4～0.8 part of calgon, 0.08～0.12 part of explosion-proof fiber, 0.8～1.2 part of steel fibre.
Preferably, the described castable for continuous casting pouring basket constant staticizer bottom 2, formed by following material by weight percentage: 10 parts of the highly-purity magnesites of 8～5mm granularity, 20 parts of the highly-purity magnesites of 5～3mm granularity, 20 parts of the highly-purity magnesites of 3～1mm granularity, 15 parts of the highly-purity magnesites of 1～0.083mm granularity, 200 30 parts of order fused magnesites, 3.5 parts of silicon powders, 0.5 part of calgon, 0.1 part of explosion-proof fiber, 0.9 part of steel fibre.
Described silicon powder, SiO2Content >=91%, granularity is less than 5 μ m, and granularity be less than 3 μ m account for 85～90%.
The preparation of this continuous casting pouring basket constant staticizer, can adopt following steps:
(1) first pour into a mould the castable of flow straightener bottom 2, add puddle mixer to be dry mixed 3～4 minutes the castable of described load weighted flow straightener, add the water of material gross weight 5.5～6.5%, wet mixing 4～6 minutes, stirs into the mud shape that is applicable to cast;
(2) castable mixing is put into mould, point shakes 4～6 times;
(3) then pour into a mould the corundum pouring material on flow straightener top 1, add puddle mixer to be dry mixed 3～4 minutes the corundum pouring material of described load weighted flow straightener, add the water of material gross weight 5～6%, wet mixing 4～6 minutes, stirs into the mud shape that is applicable to cast;
(4) corundum pouring material mixing is put into the mould of pouring into a mould castable, vibrate with shake table while feeding in raw material, until the slight bleeding in surface and while emerging without large bubble, compound flow straightener moulding completes;
(5) curing in the mold under the environment of 60～90 DEG C;
(6) demoulding, obtains the semi-finished product of flow straightener, carries out natural curing;
(7) dry, the flow straightener semi-finished product after natural curing are dried, obtain flow straightener finished product.
Preferably, step (5) curing in the mold 12 hours under the environment of 75～90 DEG C, ensures that semi-finished product have enough intensity demouldings.
Preferably, the natural curing in step (6) is the maintenances 24 hours under natural environment of flow straightener semi-finished product after the demoulding, to ensure that semi-finished product intensity reaches best.
Preferably, the dry run in step (7) is in roasting kiln, to be dried 36～40 hours, and 250 DEG C of maximum temperatures ensure that moisture is fully got rid of in goods, prevent from bursting in use procedure, gets final product kiln discharge after then naturally cooling to normal temperature.
Continuous casting pouring basket constant staticizer provided by the present invention, can significantly improve the service life of flow straightener antetheca, avoid the collapse appearance of phenomenon of flow straightener antetheca in steel pouring process, can significantly improve the service time of continuous casting tundish, reduce steel mill's production cost, effectively control the cost of resistance to material simultaneously, there is good economic benefit and social benefit.
Brief description of the drawings
Fig. 1 is the half-sectional view of flow straightener of the present invention.
Detailed description of the invention
Be below that the preparation method of invention is further illustrated, but the present invention is not limited thereto.
Preferably, described continuous casting pouring basket constant staticizer, is characterized in that, flow straightener top 1 formed by corundum pouring material cast, the bottom 2 of flow straightener is formed by castable cast, height h is 150～350mm.
The described corundum pouring material for continuous casting pouring basket constant staticizer top 1, formed by following material by weight percentage: 10 parts of the fused brown corundums of 8～5mm granularity, 15 parts of the fused brown corundums of 5～3mm granularity, 25 parts of the fused white corundums of 3～1mm granularity, 15 parts of the fused white corundums of 1～0.083mm granularity, 180 22 parts of order fused white corundums, 325 6 parts of order alumina powders, 1 part of silicon powder, the trade mark is 5 parts of CA70 pure calcium aluminate cements, 0.1 part of sodium phosphate trimer, 0.05 part of explosion-proof fiber, 0.85 part of steel fibre.
The described castable for continuous casting pouring basket constant staticizer bottom 2, formed by following material by weight percentage: 10 parts of the highly-purity magnesites of 8～5mm granularity, 20 parts of the highly-purity magnesites of 5～3mm granularity, 20 parts of the highly-purity magnesites of 3～1mm granularity, 15 parts of the highly-purity magnesites of 1～0.083mm granularity, 200 30 parts of order fused magnesites, 3.5 parts of silicon powders, 0.5 part of calgon, 0.1 part of explosion-proof fiber, 0.9 part of steel fibre.
Described silicon powder, SiO2Content >=91%, granularity is less than 5 μ m, and granularity be less than 3 μ m account for 80～85%.
The preparation method of described continuous casting pouring basket constant staticizer, comprises the following steps:
(1) first pour into a mould the castable of flow straightener bottom 2, add puddle mixer to be dry mixed 3～4 minutes the castable of described load weighted flow straightener, add the water of material gross weight 6%, wet mixing 4～6 minutes, stirs into the mud shape that is applicable to cast;
(2) castable mixing is put into mould, point shakes 4～6 times;
(3) then pour into a mould the corundum pouring material on flow straightener top 1, add puddle mixer to be dry mixed 3～4 minutes the corundum pouring material of described load weighted flow straightener, add the water of material gross weight 5.5%, wet mixing 4～6 minutes, stirs into the mud shape that is applicable to cast;
(4) corundum pouring material mixing is put into the mould of pouring into a mould castable, vibrate with shake table while feeding in raw material, until the slight bleeding in surface and while emerging without large bubble, compound flow straightener moulding completes;
(5) curing in the mold 12 hours under the environment of 75～90 DEG C, ensures that semi-finished product have enough intensity demouldings;
(6) demoulding, obtains the semi-finished product of flow straightener, and maintenance 24 hours under natural environment, to ensure that semi-finished product intensity reaches best;
(7) dry, flow straightener semi-finished product after natural curing are dried, dry run is in roasting kiln, to be dried 36～40 hours, 250 DEG C of maximum temperatures, ensure that in goods, moisture is fully got rid of, prevent from bursting in use procedure, get final product kiln discharge after then naturally cooling to normal temperature, obtain tundish current stabilizer finished product.
Above-described specific descriptions; object and technical scheme to invention have been done to further illustrate; the foregoing is only specific embodiments of the invention; the protection domain being not intended to limit the present invention; all any amendments of making in the spirit and principles in the present invention, be equal to substitute with improve etc., within all should being included in protection scope of the present invention.
Claims (2)
1. a continuous casting pouring basket constant staticizer, is made up of current stabilization the top (1) of flow straightener and the bottom (2) of flow straightenerDevice top (1) formed by corundum pouring material cast, the bottom (2) of flow straightener is poured into a mould by castableForm, height h is 150～350mm, it is characterized in that:
The corundum pouring material on the top (1) of described continuous casting pouring basket constant staticizer, by weight percentage by following material groupBecome: 10 parts of the fused brown corundums of 8～5mm granularity, 15 parts of the fused brown corundums of 5～3mm granularity, 3～1mm25 parts of the fused white corundums of granularity, 15 parts of the fused white corundums of 1～0.083mm granularity, 180 order electric smelting are white22 parts, corundum, 325 6 parts of order alumina powders, 1 part of silicon powder, the trade mark is CA70 pure calcium aluminate cement 5Part, 0.1 part of sodium phosphate trimer, 0.05 part of explosion-proof fiber, 0.85 part of steel fibre;
The castable of the bottom (2) of described flow straightener, is made up of following material: 8～5mm grain by weight percentage10 parts of the highly-purity magnesites of degree, 20 parts of the highly-purity magnesites of 5～3mm granularity, the highly-purity magnesite 20 of 3～1mm granularityPart, 15 parts of the highly-purity magnesites of 1～0.083mm granularity, 200 30 parts of order fused magnesites, 3.5 parts of silicon powders,0.5 part of calgon, 0.1 part of explosion-proof fiber, 0.9 part of steel fibre.
2. a preparation method for continuous casting pouring basket constant staticizer, is characterized in that comprising the following steps:
1) first pour into a mould the castable of the bottom (2) of flow straightener, castable as claimed in claim 1 is claimedMeasure, add puddle mixer to be dry mixed 3～4 minutes, add the water of material gross weight 5.5～6.5%, wet mixing 4～6Minute, stir into the mud shape that is applicable to cast;
2) castable mixing is put into mould, point shakes 4～6 times;
3) then pour into a mould the corundum pouring material of flow straightener top (1), by corundum pouring as claimed in claim 1Material weighs, and adds puddle mixer to be dry mixed 3～4 minutes, adds the water of material gross weight 5～6%, wet mixing 4～6Minute, stir into the mud shape that is applicable to cast;
4) corundum pouring material mixing is put into the mould of pouring into a mould castable, use vibration while feeding in raw materialPlatform vibration, until the slight bleeding in surface and while emerging without large bubble, compound flow straightener moulding completes;
5) curing in the mold 12 hours under the environment of 75～90 DEG C;
6) demoulding, obtains the semi-finished product of flow straightener, maintenance 24 hours under natural environment;
7) dry, the flow straightener semi-finished product after natural curing are dried, in roasting kiln, be dried 36～40Hour, 250 DEG C of maximum temperatures, then naturally cool to normal temperature, obtain tundish current stabilizer finished product.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103453824B (en) * | 2013-07-23 | 2016-06-22 | 山东莱钢永锋钢铁有限公司 | Flow straightener measuring method and survey tool |
| CN103613399B (en) * | 2013-12-10 | 2015-09-09 | 攀枝花钢城集团有限公司 | The vanadium iron smelting furnace preparation method of permanent layer mould material and permanent layer |
| CN103769567B (en) * | 2014-02-13 | 2016-06-22 | 唐山市国亮特殊耐火材料有限公司 | Tundish compound flow straightener and preparation method thereof |
| CN106007753B (en) * | 2016-05-19 | 2019-01-29 | 山东钢铁股份有限公司 | Castable and with the castable prepare current stabilization pushing off the slag bucket and their preparation method |
| CN106699199A (en) * | 2016-12-12 | 2017-05-24 | 河北互兴环保科技股份有限公司 | Falling chute brick and production process of falling chute brick |
| CN107954702A (en) * | 2017-12-08 | 2018-04-24 | 攀枝花钢城集团有限公司 | A kind of vanadium iron smelting furnace castable and the preparation method for pouring into a mould permanent layer |
| CN111069579B (en) * | 2019-12-31 | 2021-10-15 | 浙江红鹰铭德高温材料科技有限公司 | Long-life tundish integral impact barrel, formula and manufacturing process thereof |
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