CN203917903U - When a kind of upper, prevent the protective device of molten steel secondary oxidation - Google Patents
When a kind of upper, prevent the protective device of molten steel secondary oxidation Download PDFInfo
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- CN203917903U CN203917903U CN201420257282.9U CN201420257282U CN203917903U CN 203917903 U CN203917903 U CN 203917903U CN 201420257282 U CN201420257282 U CN 201420257282U CN 203917903 U CN203917903 U CN 203917903U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 64
- 239000010959 steel Substances 0.000 title claims abstract description 64
- 230000003647 oxidation Effects 0.000 title claims abstract description 13
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 13
- 230000001681 protective effect Effects 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000498 cooling water Substances 0.000 claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 238000009413 insulation Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 4
- 238000005266 casting Methods 0.000 abstract description 23
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000011819 refractory material Substances 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 11
- 238000009749 continuous casting Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000037390 scarring Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009865 steel metallurgy Methods 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- 238000007920 subcutaneous administration Methods 0.000 description 1
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- Continuous Casting (AREA)
Abstract
本实用新型公开了一种上浇注时防止钢液二次氧化的保护装置，采用浸入式长水口将上注注流改成埋入式潜流。该装置包括：长水口和循环冷却系统，所述长水口上端连接钢包，下端插入到钢锭模的钢液液面以下，所述循环冷却系统由环绕在长水口上的冷却水管构成，其环绕位置在钢包与保温帽之间，冷却水管有进水管和出水管，进水管上设置压力表和压力调节阀，冷却水由进水管流入，出水管流出。本实用新型采用与浇注钢水成分相同的长水口，插入到钢液液面以下，避免了浇铸钢液的二次氧化，也避免了使用耐火材料的水口所引起的非金属夹杂物的引入，提高了钢液的纯净度，也提高铸件质量；采用钢质材料的长水口，也可以减少钢锭浇铸成本。
The utility model discloses a protection device for preventing secondary oxidation of molten steel during upcasting, which adopts a submerged long nozzle to change the upcasting flow into an embedded submerged flow. The device includes: a shroud and a circulating cooling system. The upper end of the shroud is connected to the ladle, and the lower end is inserted below the liquid steel surface of the ingot mould. The circulating cooling system is composed of cooling water pipes surrounding the shroud. Between the ladle and the insulation cap, the cooling water pipe has a water inlet pipe and a water outlet pipe. A pressure gauge and a pressure regulating valve are arranged on the water inlet pipe. The cooling water flows in through the water inlet pipe and flows out through the water outlet pipe. The utility model adopts a long nozzle with the same composition as the pouring molten steel, which is inserted below the molten steel surface, avoids the secondary oxidation of the casting molten steel, and also avoids the introduction of non-metallic inclusions caused by the nozzle using refractory materials, and improves The purity of molten steel is improved, and the quality of castings is also improved; the shroud made of steel can also reduce the cost of ingot casting.
Description
技术领域technical field
本实用新型涉及钢铁冶金工业模铸浇注装置，特别是一种上浇注时防止钢液二次氧化的保护装置。The utility model relates to a mold casting pouring device in the iron and steel metallurgy industry, in particular to a protection device for preventing secondary oxidation of molten steel during upcasting.
背景技术Background technique
钢铁冶金工艺中浇铸的方法有连铸和模铸，模铸法生产钢锭已有一百多年的历史，目前在钢铁生产中仍占有一席之地，连铸对其生产的钢种要求具有一定的可浇铸性，同时要有一定的规模。与连铸相比，模铸在大型材生产领域具有独特的优势：能满足大型材生产对致密度大的高要求，而连铸不能生产；能提供高屈服强度、冲击功材料，而连铸坯凝固特点决定了容易出现影响性能的中心偏析和缩孔等内部缺陷。所以模铸仍然十分的重要，而模铸法可分为坑铸法、车铸法、上注法和下注法，其中上注法是将钢液直接由钢锭模上口直接注入的方法，也是最简易的模铸方法。然而，金属模铸造容易产生裂纹缺陷，尤其是上注式浇铸钢锭时，在浇注过程中，空气同模内不断更新的裸露液面作用，使二次氧化加剧。据测算，浇注期间模内钢液总的裸露面积为钢锭模内腔横截面积的数百倍，造成钢种含氧量的增加。同时，上注式浇铸钢锭，容易产生钢水开浇时的钢液飞溅现象，造成结疤、皮下气泡等缺陷。因此避免上浇注时产生的钢液飞溅有利于提高钢液的质量及模具的寿命。Casting methods in the iron and steel metallurgical process include continuous casting and mold casting. The production of steel ingots by mold casting has a history of more than 100 years, and it still occupies a place in steel production. Castability, at the same time must have a certain scale. Compared with continuous casting, die casting has unique advantages in the field of large-scale bar production: it can meet the high density requirements of large-scale bar production, while continuous casting cannot produce; it can provide materials with high yield strength and impact work, while continuous casting The solidification characteristics of billets determine that internal defects such as central segregation and shrinkage cavities that affect performance are prone to occur. Therefore, mold casting is still very important, and the mold casting method can be divided into pit casting method, car casting method, upper injection method and lower injection method. It is also the easiest molding method. However, metal mold casting is prone to crack defects, especially when casting steel ingots with upward injection. During the pouring process, the air acts on the continuously updated exposed liquid surface in the mold, which intensifies the secondary oxidation. According to calculations, the total exposed area of molten steel in the mold during pouring is hundreds of times the cross-sectional area of the inner cavity of the ingot mold, resulting in an increase in the oxygen content of the steel. At the same time, the upward injection casting steel ingot is prone to splashing of molten steel when the molten steel is poured, resulting in defects such as scarring and subcutaneous air bubbles. Therefore, avoiding the splashing of molten steel during pouring is beneficial to improve the quality of molten steel and the life of the mould.
专利公开号：CN2579558Y公开了一种钢液模铸全封闭氩气保护浇注装置，该装置使高温金属钢液从钢包底部的水口浇入中注管上口时，处于全封闭氩气保护状态，完全隔绝了钢液和空气的接触，提高了钢水的纯净度，减少了钢液中N的含量和氧化物夹杂，提高钢材质量，满足了用户的高质量要求。但该装置仅是上注式浇铸钢锭的优化浇铸设备，不能有效地解决上注式浇筑铸钢锭开浇时产生飞溅的问题。Patent Publication No.: CN2579558Y discloses a fully enclosed argon-protected pouring device for molten steel mold casting. This device enables high-temperature metal molten steel to be in a fully-enclosed argon-protected state when it is poured from the nozzle at the bottom of the ladle into the upper opening of the middle injection pipe. It completely isolates the contact between molten steel and air, improves the purity of molten steel, reduces the content of N and oxide inclusions in molten steel, improves the quality of steel, and meets the high-quality requirements of users. But this device is only an optimized casting equipment for the upward injection casting steel ingot, and cannot effectively solve the problem of splashing when the upward injection casting steel ingot is poured.
专利公开号：CN201264090Y公开了一种气体保护浇注用浸入式水口，该水口设圆柱体，圆柱体上部设置碗状体，圆柱体上开设浇注孔，碗状体的内腔与浇注孔相连接，碗状体的内腔内壁上开设环状凹槽，碗状体上开设通气孔，通气孔与环状凹槽相连接。其优点在于：它在与下水口配合时，惰性气体经过通气孔与凹槽结合，弥散在下水口与浸入式水口间的配合面产生的间隙内，从从而彻底杜绝了空气接触钢流的现象，降低了钢水中的氧化物夹杂，提高了钢材的产品质量等。但浇注过程中的钢液冲刷耐火材料造成的非金属夹杂物引入的问题并没有解决，造成钢锭中出现组织缺陷，使凝固后的钢锭质量下降。Patent publication number: CN201264090Y discloses a submerged nozzle for gas protection casting. The nozzle is provided with a cylinder, and a bowl is provided on the upper part of the cylinder. A pouring hole is provided on the cylinder. The inner cavity of the bowl is connected with the pouring hole. An annular groove is provided on the inner wall of the inner cavity of the bowl-shaped body, and a ventilation hole is provided on the bowl-shaped body, and the ventilation hole is connected with the annular groove. Its advantage is that when it cooperates with the nozzle, the inert gas is combined with the groove through the vent hole, and diffuses in the gap formed by the mating surface between the nozzle and the submerged nozzle, thereby completely eliminating the phenomenon of air contacting the steel flow. It reduces the oxide inclusions in molten steel and improves the product quality of steel. However, the problem of the introduction of non-metallic inclusions caused by the liquid steel scouring the refractory during the pouring process has not been solved, resulting in structural defects in the steel ingot, which reduces the quality of the solidified steel ingot.
专利公开号：CN201744650U公开了一种连铸保护浇注装置，该装置包括钢水罐和长水口，所述钢水罐包括设置于其底部的下水口，所述下水口底部插入长水口的顶端，所述长水口顶部和下水口底部分别设置有相配合的锥形内腔和外斜面，所述锥形内腔的斜度与下水口底部外斜面的斜度相一致。避免了现有长水口与下水口线接触密封不好的问题，接触方式由线接触转变为面接触或者多线段接触方式，实现长水口与钢水罐接合部位配合紧密，性能可靠、成本低、使用方便。适用于在连铸中将钢液由钢水罐注入中间罐。但是该装置只适用于连铸的生产过程，并不适用于模铸坯料的生产。Patent Publication No.: CN201744650U discloses a continuous casting protective pouring device, the device includes a molten steel tank and a shroud, the molten steel tank includes a lower nozzle arranged at the bottom thereof, the bottom of the lower nozzle is inserted into the top of the shroud, the The top of the shroud and the bottom of the drain are respectively provided with matching conical inner chambers and outer slopes, the slope of the tapered inner cavity is consistent with the slope of the outer slope at the bottom of the drain. It avoids the problem of poor line contact and sealing between the existing shroud and the lower nozzle, and the contact mode is changed from line contact to surface contact or multi-line segment contact, so that the joint between the shroud and the molten steel tank can be closely matched, reliable in performance, low in cost, and easy to use. convenient. It is suitable for injecting molten steel from the molten steel tank into the tundish in continuous casting. But this device is only suitable for the production process of continuous casting, not suitable for the production of die-cast blanks.
实用新型内容Utility model content
本实用新型提供了一种上浇注时防止钢液二次氧化的保护装置，采用浸入式长水口将上注注流改成埋入式潜流。The utility model provides a protection device for preventing the secondary oxidation of molten steel during upcasting, which adopts a submerged long nozzle to change the upcasting flow into an embedded submerged flow.
本实用新型提供了一种上浇注时防止钢液二次氧化的保护装置包括：长水口和循环冷却系统，所述长水口上端连接钢包，下端插入到钢锭模的钢液液面以下，所述循环冷却系统由环绕在长水口上的冷却水管构成，其环绕位置在钢包与保温帽之间，冷却水管有进水管和出水管，进水管上设置压力表和压力调节阀，冷却水由进水管流入，出水管流出。The utility model provides a protection device for preventing secondary oxidation of molten steel during upcasting, comprising: a shroud and a circulating cooling system, the upper end of the shroud is connected to a ladle, and the lower end is inserted below the molten steel surface of a steel ingot mould. The circulating cooling system is composed of cooling water pipes that surround the long nozzle, and the surrounding position is between the ladle and the heat preservation cap. The cooling water pipes have water inlet pipes and water outlet pipes. Inflow, outlet pipe outflow.
所述长水口为直筒型水口，水口材质与钢液的材质相同，长水口的壁厚为50mm，直径为300-350mm。The shroud is a straight nozzle, the material of the shroud is the same as that of the molten steel, the wall thickness of the shroud is 50mm, and the diameter is 300-350mm.
所述冷却水管直径为30mm。The diameter of the cooling water pipe is 30mm.
本实用新型与现有同类装置相比，其有益效果体现在：Compared with the existing similar devices, the utility model has the beneficial effects as follows:
采用与浇注钢水成分相同的长水口，插入到钢液液面以下，避免了浇铸钢液的二次氧化，也避免了使用耐火材料的水口所引起的非金属夹杂物的引入，提高了钢液的纯净度，也提高铸件质量；采用钢质材料的长水口，也可以减少钢锭浇铸成本。与此同时，钢质长水口随着浇注过程熔化，相当于向浇注钢水中加入冷铁，降低了钢液的过热度，可以以此来降低钢水的温度，加速钢液的冷却速度。The long nozzle with the same composition as the pouring molten steel is used, inserted below the liquid steel surface, avoiding the secondary oxidation of the casting molten steel, and also avoiding the introduction of non-metallic inclusions caused by the nozzle using refractory materials, and improving the molten steel The purity of the casting also improves the quality of the casting; the shroud made of steel can also reduce the cost of ingot casting. At the same time, the steel long nozzle melts with the pouring process, which is equivalent to adding cold iron to the molten steel to reduce the superheat of the molten steel, which can reduce the temperature of the molten steel and accelerate the cooling speed of the molten steel.
附图说明Description of drawings
图1是一种上浇注时防止钢液二次氧化的保护装置结构示意图。Fig. 1 is a structural schematic diagram of a protection device for preventing secondary oxidation of molten steel during upcasting.
具体实施方式Detailed ways
如图1所示，一种上浇注时防止钢液二次氧化的保护装置，该装置由长水口3和循环冷却系统4构成，所述长水口3上端连接钢包6，下端插入到钢锭模2的钢液5液面以下，所述循环冷却系统4由环绕在长水口3上的冷却水管构成，其环绕位置在钢包6与保温帽1之间，冷却水管有进水管8和出水管7，进水管8上设置压力表9和压力调节阀10，冷却水由进水管8流入，出水管7流出。所述长水口3为直筒型水口，水口材质与钢液5的材质相同，长水口3的壁厚为50mm，直径为300-350mm。所述冷却水管直径为30mm。As shown in Figure 1, a protection device for preventing secondary oxidation of molten steel during upcasting, the device is composed of a shroud 3 and a circulating cooling system 4, the upper end of the shroud 3 is connected to a ladle 6, and the lower end is inserted into a steel ingot mold 2 Below the liquid level of the molten steel 5, the circulating cooling system 4 is composed of a cooling water pipe surrounding the long nozzle 3, and its surrounding position is between the ladle 6 and the thermal insulation cap 1, and the cooling water pipe has an inlet pipe 8 and an outlet pipe 7, The water inlet pipe 8 is provided with a pressure gauge 9 and a pressure regulating valve 10, the cooling water flows in through the water inlet pipe 8, and flows out through the water outlet pipe 7. The shroud 3 is a straight nozzle, the material of the shroud is the same as that of the molten steel 5, the wall thickness of the shroud 3 is 50mm, and the diameter is 300-350mm. The diameter of the cooling water pipe is 30mm.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420257282.9U CN203917903U (en) | 2014-05-19 | 2014-05-19 | When a kind of upper, prevent the protective device of molten steel secondary oxidation |
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| CN201420257282.9U CN203917903U (en) | 2014-05-19 | 2014-05-19 | When a kind of upper, prevent the protective device of molten steel secondary oxidation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105642870A (en) * | 2016-03-03 | 2016-06-08 | 江苏安捷利机电科技有限公司 | Casting after-treatment equipment |
| CN106001521A (en) * | 2016-06-01 | 2016-10-12 | 安庆石化联盟铸管厂 | Energy-saving type water cooling equipment for metal pipes |
| CN117583585A (en) * | 2023-10-20 | 2024-02-23 | 包头钢铁（集团）有限责任公司 | A protection device and method for preventing secondary oxidation of molten ladle steel |
-
2014
- 2014-05-19 CN CN201420257282.9U patent/CN203917903U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105642870A (en) * | 2016-03-03 | 2016-06-08 | 江苏安捷利机电科技有限公司 | Casting after-treatment equipment |
| CN106001521A (en) * | 2016-06-01 | 2016-10-12 | 安庆石化联盟铸管厂 | Energy-saving type water cooling equipment for metal pipes |
| CN117583585A (en) * | 2023-10-20 | 2024-02-23 | 包头钢铁（集团）有限责任公司 | A protection device and method for preventing secondary oxidation of molten ladle steel |
| CN117583585B (en) * | 2023-10-20 | 2025-10-24 | 包头钢铁（集团）有限责任公司 | A protection device and method for preventing secondary oxidation of molten steel in ladle |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20150519 |
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| EXPY | Termination of patent right or utility model |