阅读说明：本技术 超长寿命防氧化通用改进型中间包下水口 (Universal improved tundish water outlet with ultra-long service life and anti-oxidation function ) 是由 高桂航 周九喜 刘沛建 梁邦喜 张美杰 钱晓飞 高桂显 殷海轩 姚梦柔 于 2021-01-22 设计创作，主要内容包括：本发明公开了超长寿命防氧化通用改进型中间包下水口,包括下水口本体,所述下水口本体分为滑板面本体、滑板面氧化锆芯、本体、本体氧化锆芯及钢水通道,所述本体的底部为内凹的弧形结构,所述弧形结构的垂直高度是下水口本体高度的0.1-1倍,本发明下水口本体的底部设计成弧形结构,可以匹配整体式浸入式水口、组合型浸入式水口及滑动水口型浸入式水口相匹配,不会出现浸入式水口与下水口不匹配的现象,消除安全隐患,下水口本体的底部的弧形结构可以插接在浸入式水口的内腔,浸入式水口与中包下水口连接处不会因钢水的波动,使下水口与浸入式水口贴合处产生歪斜,气体无法进入钢水中,钢水不会出现二次氧化,保证钢水质量。(The invention discloses an anti-oxidation general improved tundish sewer nozzle with an ultra-long service life, which comprises a sewer nozzle body, wherein the sewer nozzle body is divided into a slide plate surface body, a slide plate surface zirconium oxide core, a body zirconium oxide core and a molten steel channel, the bottom of the body is of an inwards concave arc-shaped structure, and the vertical height of the arc-shaped structure is 0.1-1 times of the height of the sewer nozzle body. Gas can not enter molten steel, and the molten steel can not be secondarily oxidized, so that the quality of the molten steel is ensured.)

1. The anti-oxidation general improved generation of overlength life is the mouth of a river under pouring into the middle of, its characterized in that: the lower nozzle comprises a lower nozzle body (1), wherein the lower nozzle body (1) is divided into a sliding plate surface body (2), a sliding plate surface zirconia core (3), a body (4), a body zirconia core (5) and a molten steel channel (6), the sliding plate surface zirconia core (3) is positioned in an inner cavity of the sliding plate surface body (2), the body zirconia core (5) is positioned in the inner cavity of the body (4), the top of the sliding plate surface zirconia core (3) is a bowl opening (7), the bottom of the sliding plate surface zirconia core is provided with a body zirconia core clamping groove (8), the inner cavity is an upper molten steel channel (9), a bulge (10) is arranged on the body zirconia core (5), the bulge (10) is matched with the body zirconia core clamping groove (8), the body zirconia core (5) is clamped in the body zirconia core clamping groove (8) arranged on the sliding plate surface zirconia core (3) through the bulge (10) and connected with the sliding plate surface zirconia core (3), the slide plate surface zirconia core (3) and the body zirconia core (5) are connected together, the side surface of the slide plate surface zirconia core is of a T-shaped structure, the inner cavity of the body zirconia core (5) is a lower molten steel channel (11), the central lines of the upper molten steel channel (9) and the lower molten steel channel (11) are superposed and communicated to form a molten steel channel (6), the bottom of the body (4) is of an inwards concave arc-shaped structure (12), and the vertical height of the arc-shaped structure (12) is 0.1-1 time of the height of the body of the lower nozzle body (1).

2. The universal improved tundish nozzle of claim 1, wherein the universal improved tundish nozzle has an ultra-long service life and is characterized in that: the slide plate surface body (2) and the body (4) are of an integral structure.

3. The universal improved tundish nozzle of claim 1, wherein the universal improved tundish nozzle has an ultra-long service life and is characterized in that: the inner diameter of the top of the body zirconia core (5) is 1.01-2 times of the inner diameter of the bottom of the slide plate zirconia core (3).

4. The universal improved tundish nozzle of claim 1, wherein the universal improved tundish nozzle has an ultra-long service life and is characterized in that: the bowl mouth (7) is in a funnel shape, and the diameter of the upper bowl mouth is 1.01-2 times of that of the lower bowl mouth.

5. The universal improved tundish nozzle of claim 1, wherein the universal improved tundish nozzle has an ultra-long service life and is characterized in that: the top internal diameter of the bulk zirconia core (5) is 1.01-2 times the bottom internal diameter.

6. The universal improved tundish nozzle of claim 1, wherein the universal improved tundish nozzle has an ultra-long service life and is characterized in that: the apparent porosity of the slide plate surface body (2) and the apparent porosity of the slide plate surface body (4) are less than or equal to 14 percent, and the volume density is more than or equal to 2.6 g/cubic centimeter.

7. The universal improved tundish nozzle of claim 1, wherein the universal improved tundish nozzle has an ultra-long service life and is characterized in that: the apparent porosity of the slide plate surface zirconia core (3) and the bulk zirconia core (5) is less than or equal to 16 percent, and the volume density is more than or equal to 5.1 g/cc.

Technical Field

The invention relates to the technical field of continuous casting processing of refractory materials, in particular to an anti-oxidation general improved tundish nozzle with an ultra-long service life.

Background

The lower nozzle is an important part in the production process of continuous casting steel, is arranged at the bottom of a tundish, is connected with an immersion nozzle at the bottom, is contacted with molten steel with the temperature of more than 1500 ℃ for a long time, and the lower nozzle is disturbed by the static pressure of the high-temperature molten steel, the jacking force of the upper nozzle to the lower nozzle from bottom to top and the high-speed flow of the high-temperature and high-specific gravity molten steel, so the quality of the down nozzle must be guaranteed, the cleanliness of the continuous casting molten steel mainly refers to the quantity, the size, the distribution and the form of non-metallic inclusions in the steel, the sources of the continuous casting inclusions are divided into an endogenous type and an exogenous type, wherein the endogenous inclusions are mainly products generated by the reaction of the deoxidizing element and oxygen dissolved in the steel, the foreign impurities are the interaction products of molten steel, air, refractory materials and the like in the whole process from steel making to pouring, and are also called secondary oxidation products. Lower mouth of a river and immersion nozzle are the key control point of prevention external inclusion, molten steel continuous casting in-process need guarantee that the molten steel has the lower mouth of a river entering immersion nozzle, the leakproofness of the two contact laminating department is good, the condition of gas leakage can not appear, the lower mouth of a river junction of current immersion nozzle and well package, can be because of the fluctuation of molten steel, make lower mouth of a river and immersion nozzle laminating department produce crooked, there is gaseous entering molten steel, make the molten steel secondary oxidation appear, the quality of steel billet has been seriously influenced, and the immersion nozzle of different types need match the lower mouth of a river of different types, the commonality of lower mouth of a river is poor, the customer needs the lower mouth of a river of different types of storage, it is wrong with lower mouth of a river use easily when the equipment, make immersion nozzle and lower mouth of a river, can take place the.

The invention solves the technical problem by providing an ultra-long service life anti-oxidation universal improved tundish sewer opening.

Disclosure of Invention

The invention aims to overcome the technical problems that the joint of a submerged nozzle and a tundish submerged nozzle in the prior art is inclined due to the fluctuation of molten steel, gas enters the molten steel, secondary oxidation occurs to the molten steel, the quality of steel billets is seriously influenced, submerged nozzles of different types need to be matched with submerged nozzles of different types, the universality of the submerged nozzles is poor, customers need to store the submerged nozzles of different types, the submerged nozzles are easy to use wrongly during assembly, the submerged nozzles are not matched with the submerged nozzles, and safety accidents occur seriously, and the invention provides an ultra-long-life anti-oxidation general improved tundish submerged nozzle which has an ultra-long service life, has an arc structural design at the bottom, can be matched with submerged nozzles of various types, can be inserted into an inner cavity of the submerged nozzles, and ensures the sealing performance of the joint of the submerged nozzles and the submerged nozzles, reducing secondary oxidation of oxygen absorption of molten steel and improving the quality of the molten steel.

In order to achieve the purpose, the invention adopts the technical scheme that: the lower nozzle comprises a lower nozzle body 1, wherein the lower nozzle body 1 is divided into a slide plate surface body 2, a slide plate surface zirconia core 3, a body 4, a body zirconia core 5 and a molten steel channel 6, the slide plate surface zirconia core 3 is positioned in the inner cavity of the slide plate surface body 2, the body zirconia core 5 is positioned in the inner cavity of the body 4, the top of the slide plate surface zirconia core 3 is a bowl mouth 7, the bottom of the slide plate surface zirconia core 3 is provided with a body zirconia core clamping groove 8, the inner cavity is an upper molten steel channel 9, the body zirconia core 5 is provided with a bulge 10, the bulge 10 is matched with the body zirconia core clamping groove 8, the body zirconia core 5 is clamped in the body zirconia core clamping groove 8 arranged on the slide plate surface zirconia core 3 through the bulge 10 and connected with the slide plate surface zirconia core 3, the side surface of the slide plate surface zirconia core 3 is in a T-shaped structure with the body zirconia core 5, the inner cavity of the body zirconia core 5 is a lower molten, the central lines of the upper molten steel channel 9 and the lower molten steel channel 11 are superposed and communicated to form a molten steel channel 6, the bottom of the body 4 is an inward concave arc-shaped structure 12, and the vertical height of the arc-shaped structure 12 is 0.1-1 time of the height of the body of the lower nozzle body 1.

Further, the slide plate surface body 2 and the body 4 are of an integral structure.

Further, the top inner diameter of the bulk zirconia core 5 is 1.01 to 2 times the bottom inner diameter of the slide face zirconia core 3.

Furthermore, the bowl mouth 7 is in a funnel shape, and the diameter of the upper bowl mouth is 1.01-2 times of that of the lower bowl mouth.

Further, the top inner diameter of the bulk zirconia core 5 is 1.01 to 2 times the bottom inner diameter.

Furthermore, the apparent porosity of the slide plate surface body 2 and the apparent porosity of the slide plate body 4 are less than or equal to 14 percent, and the volume density is more than or equal to 2.6 g/cubic centimeter.

Furthermore, the apparent porosity of the slide plate surface zirconia core 3 and the bulk zirconia core 5 is less than or equal to 16 percent, and the volume density is more than or equal to 5.1 g/cubic centimeter.

Compared with the prior art, the invention has the advantages that: the bottom of the lower nozzle body is designed into an arc-shaped structure which can be matched with an integral submerged nozzle, a combined submerged nozzle and a sliding nozzle type submerged nozzle, the arc-shaped structure at the bottom of the lower nozzle body can be inserted into an inner cavity of the submerged nozzle, so that the joint of the submerged nozzle and the lower nozzle of the tundish cannot be inclined due to the fluctuation of molten steel, gas cannot enter the molten steel, the molten steel cannot be secondarily oxidized, and the quality of the molten steel is ensured. The contact area of the lower nozzle and the upper nozzle is made of zirconia, and the zirconia core of the slide plate surface is connected with the zirconia core of the lower body to form a T-shaped structural design, so that the wear-resisting and molten steel scouring-resisting performance of the lower nozzle is enhanced, the molten steel splitting event is avoided, the service life of the lower nozzle is prolonged, the frequent replacement of the lower nozzle is avoided, the labor intensity and the production cost are reduced, and the production requirement of continuous casting steel is met.

Drawings

FIG. 1 is a schematic view of the structure of an ultra-long life anti-oxidation universal improved tundish drain nozzle of the present invention;

FIG. 2 is a schematic view of a quick change tundish nozzle configuration using the ultra-long life anti-oxidation universal modified tundish nozzle of the present invention;

in the figure: 1. a lower nozzle body; 2. a skateboard deck body; 3. a slide plate zirconia core; 4. a body; 5. a bulk zirconia core; 6. a molten steel channel; 7. a bowl mouth; 8. a clamping groove of the zirconia core of the body; 9. feeding molten steel into a molten steel channel; 10. a protrusion; 11. a molten steel discharging passage; 12. and (4) an arc-shaped structure.

Detailed Description

In view of the defects in the prior art, the technical scheme of the invention is provided through long-term research and massive practice. The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Fig. 1 is a schematic structural view of an ultra-long-life anti-oxidation general improved tundish nozzle provided in an embodiment of the present invention, fig. 2 is a schematic structural view of a quick-change tundish nozzle using an ultra-long-life anti-oxidation general improved tundish nozzle of the present invention, as shown in fig. 1 and fig. 2, the ultra-long-life anti-oxidation general improved tundish nozzle provided in an embodiment of the present invention: the lower nozzle comprises a lower nozzle body 1, wherein the lower nozzle body 1 is divided into a slide plate surface body 2, a slide plate surface zirconia core 3, a body 4, a body zirconia core 5 and a molten steel channel 6, the slide plate surface zirconia core 3 is positioned in the inner cavity of the slide plate surface body 2, the body zirconia core 5 is positioned in the inner cavity of the body 4, the top of the slide plate surface zirconia core 3 is a bowl mouth 7, the bottom of the slide plate surface zirconia core 3 is provided with a body zirconia core clamping groove 8, the inner cavity is an upper molten steel channel 9, the body zirconia core 5 is provided with a bulge 10, the bulge 10 is matched with the body zirconia core clamping groove 8, the body zirconia core 5 is clamped in the body zirconia core clamping groove 8 arranged on the slide plate surface zirconia core 3 through the bulge 10 and connected with the slide plate surface zirconia core 3, the side surface of the slide plate surface zirconia core 3 is in a T-shaped structure with the body zirconia core 5, the inner cavity of the body zirconia core 5 is a lower molten, the central lines of the upper molten steel channel 9 and the lower molten steel channel 11 are superposed and communicated to form a molten steel channel 6, the bottom of the body 4 is an inward concave arc-shaped structure 12, and the vertical height of the arc-shaped structure 12 is 0.1-1 time of the height of the body of the lower nozzle body 1.

In the general improved tundish sewer inlet with the ultra-long service life and the anti-oxidation function, the slide plate surface body 2 and the slide plate surface body 4 are of an integral structure.

In the universal improved tundish sewer inlet with the ultra-long service life and the anti-oxidation function, the inner diameter of the top of the main body zirconia core 5 is 1.01-2 times of the inner diameter of the bottom of the slide plate face zirconia core 3.

According to the universal improved tundish water outlet with the ultra-long service life and the anti-oxidation function, the bowl opening 7 is in a funnel shape, the diameter of the upper bowl opening is 1.01-2 times that of the lower bowl opening, the flow speed of molten steel is reduced, and the scouring force of the molten steel is reduced.

According to the universal improved tundish water outlet with the ultra-long service life and the anti-oxidation function, the inner diameter of the top of the main body zirconia core 5 is 1.01-2 times of the inner diameter of the bottom, and the scouring force of molten steel on the inner cavity of the main body zirconia core is reduced.

According to the general improved tundish sewer inlet with the ultra-long service life and the anti-oxidation function, the apparent porosity of the slide plate surface body 2 and the apparent porosity of the slide plate surface body 4 are less than or equal to 14%, and the volume density is more than or equal to 2.6 g/cc.

According to the general improved tundish water outlet with the ultra-long service life and the anti-oxidation function, the apparent porosity of the slide plate surface zirconia core 3 and the bulk zirconia core 5 is less than or equal to 16%, and the volume density is more than or equal to 5.1 g/cc.

The invention has the beneficial effects that: the bottom of the lower nozzle body is designed into an arc-shaped structure which can be matched with an integral submerged nozzle, a combined submerged nozzle and a sliding nozzle type submerged nozzle, the arc-shaped structure at the bottom of the lower nozzle body can be inserted into an inner cavity of the submerged nozzle, so that the joint of the submerged nozzle and the lower nozzle of the tundish cannot be inclined due to the fluctuation of molten steel, gas cannot enter the molten steel, the molten steel cannot be secondarily oxidized, and the quality of the molten steel is ensured. The contact area of the lower nozzle and the upper nozzle is made of zirconia, and the zirconia core of the slide plate surface is connected with the zirconia core of the lower body to form a T-shaped structural design, so that the wear-resisting and molten steel scouring-resisting performance of the lower nozzle is enhanced, the molten steel splitting event is avoided, the service life of the lower nozzle is prolonged, the frequent replacement of the lower nozzle is avoided, the labor intensity and the production cost are reduced, and the production requirement of continuous casting steel is met.

It should be understood that the above-mentioned embodiments are only illustrative of the technical concept and features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.