#Tundish Metering Nozzle

[chinarefractorymaterial]

Tundish Metering Nozzle

Tundish metering nozzle is composed of inner zirconia and outer high alumina, produced by reasonable size and high temperature sintering process. Tundish metering nozzle is one of the refractory materials used in billet continuous casting. It plays a role in controlling the flow of molten steel. …… Source: http://www.cxfirebrick.com/en/product/metering-nozzle.html

[judiansteelcastingandrolling]

Differences of Horizontal, Arc, and Elliptical Continuous Casting Machine

Continuous casting is a manufacturing process which melts metal into liquid, and then the liquid metal is poured into a set of condensing equipment. When the metal is partially condensed, a casting of a certain length and shape is drawn from another section of the condensing equipment. Continuous casting is a mainstream steel-forming method. The equipment used in this manufacturing process is called continuous casting equipment or continuous casting machine.

Then, how many types of continuous casting machine do you know? What are the respective characteristics?

Horizontal Continuous Casting Machine

The crystallizer, secondary cooling zone, tension leveler, cutting equipment, and other equipment of the horizontal continuous casting machine are installed in a horizontal position, and the tundish and the crystallizer are closely connected. A separation ring is installed at the connection between the nozzle of the tundish and the crystallizer. During casting, the crystallizer does not vibrate, but the casting machine drives the casting blank to perform periodic motions of pulling, stopping, reverse pushing, and stopping. A horizontal continuous caster is the lowest continuous caster.

However, due to the inability to stop the machine, it is necessary to replace the expensive separation ring and repair the crystallizer and graphite sleeve when the machine is stopped. The continuous power on cannot exceed 24 hours. The crystallizer cannot be lubricated, the casting device is too complicated, and the three key technologies are not up to standard, so it is not widely used now.

Arc Continuous Casting Machine

Since the crystallizer is arc-shaped, the steel slab drawn out is also arc-shaped. The mold and the secondary cooling section are arranged on a quarter of arc. Before straightened, the billet moves down along the arc and solidifies. Then, we use a five-roller straightening machine to straighten the billet at the position before the vertical center tangent point. When the slab is straightened, the inner arc extends outward, and the outer arc squeezes inward. Because the five-roller straightening machine is a single-point straightening, in order to prevent the slab from cracks, broken slab, and internal damage, and to control the deformation of the slab within the allowable deformation coefficient range, the radius of the arc needs to be increased, which is why the arc machine is built tall. At present, the arc machine is mainly used in the billet and round billet below 150mm at home and abroad. For example, the height of the large slab for drawing casting must be at least 15 meters. The investment in infrastructure facilities is too large, so it is not suitable for drawing and casting large slabs.

Elliptical Continuous Casting Machine

In order to further reduce the height of the continuous casting machine and reduce the investment scale, one arc radius of the arc continuous casting machine is changed into multiple arc radii, that is, the arc radius gradually increases from the crystallizer down to the allowable Straightening is carried out after the amount of deformation, so that the height of the casting machine can be reduced by using a small arc crystallizer and gradually increasing the radius of the arc. This model is also called an ultra-low head continuous casting machine. Compared with the arc-type machine, it has a large number of rollers, high manufacturing precision requirements, and relatively complicated arc adjustment and installation. At present, it is usually applied to drawing casting large slabs, and profiled blanks.

Summary

The emergence and rapid development of continuous casting technology make the production of continuous casting steel have the characteristics of a short production process, low energy consumption, low casting cost, and high productivity. Compared with traditional mold casting technology, continuous casting technology has obvious advantages. Due to the extremely high yield rate of continuous casting technology products, it is easy to realize industrial automation, and the reasons such as low labor intensity are rapidly gaining popularity.

[adtechmetallurgicalmaterials]

Changzhi strives to realize the high-end capacitor new material technology industrial park to be put into operation before May

On March 20, at the construction site of Changzhi High-tech Zone Fengbin Electronics (Shenzhen) Co., Ltd. Kaisong Electronics High-end Capacitor New Material Technology Industrial Park Project, machines roared, welding spatters scattered, vehicles shuttled, and all work was progressing in an orderly manner.

Fengbin Electronics (Shenzhen) Co., Ltd. is a national high-tech enterprise integrating R&D, production and sales of a full range of aluminum electrolytic capacitors. Its products are widely used in 3C industry, smart home, new energy vehicles and other fields. It cooperates with Huawei, Samsung, Fortune 500 companies such as Flextronics and Chinese Academy of Sciences, South China University of Technology, Shenzhen University and other institutions have established long-term strategic cooperative relations.

The total investment of Kaisong Electronics High-end Capacitor New Material Technology Industrial Park project is about 9.505 billion yuan, covering an area of 516,000 square meters, and will be constructed in two phases. After the two phases of the project are fully put into operation, the total annual output value will be about 6.8 billion yuan, the profits and taxes will be about 534 million yuan, and more than 1,200 people will be employed. "This is our high-speed intelligent aluminum foil production line. Now 10 production lines have been installed and debugged, and have production capacity. After the product enters the market, it will break the foreign monopoly on aluminum foil and energy storage material process technology, and greatly enhance our high-end aluminum foil and energy storage materials. The market share of energy storage materials. At present, we are making every effort to promote the renovation of the factory building, and work hard to speed up the construction, and strive to achieve production before May." Zhao Jianmin, deputy general manager of Kaisong Electronic Technology (Shanxi) Co., Ltd., introduced.

It is understood that the smooth progress of the project has benefited from a package of high-value policies and measures implemented by the high-tech zone in terms of project cultivation, talent introduction, carrier construction and technology finance. After the enterprise entered Changzhi, the staff of the high-tech zone took the initiative to connect with each other to help coordinate and solve problems, and also provided various facilitation services to ensure the smooth entry and construction of the enterprise.

Since the start of the project construction, the high-tech zone has continuously increased its service efforts. According to the actual situation, the idle old factory buildings will be "vacated for birds" to revitalize the land stock and provide a guarantee for the early start of the project. With the orderly progress of the project, the high-tech zone has taken a solid step in accelerating the development of four tens of billions of industrial clusters: electronic information, photovoltaics, high-end equipment manufacturing, biomedicine and general health.

Adtech Metallurgical Materials Co.,Ltd is a Sino-foreign joint venture integrating R&D, production, operation and service of metallurgical materials. With strong technical force and perfect production and operation system, it has passed ISO 9001 quality system certification and ISO14001 environmental assessment certification. It has established long-term cooperative partnerships with more than a dozen countries and regions. The main products of adtech :

porous ceramic filter

ceramic foam filter . 

rotary degassing, degassing unit .

boron nitride coating  refining flux, 

launder system . electric launder system .

tundish nozzle, tap out cone, tap out cone, caster tip , tap cone, etc.

To learn more, please follow website: https://www.alalloycasting.com/ 

Contact: sales@alalloycasting.com

[cxrefractories]

How to choose tundish nozzles

Hi, do you know about tundish nozzles I think the answer is yes, let’s do a quiz, which one do you think is better? Please write your choice in the comment, then go through the following to see if your choice is bingo.

Factors Influence the Tundish Nozzle Campaign Life (1)Weight When the molding pressure is about 300MPa, the bulk density of the zirconium sizing nozzle is large, the porosity is low, and the zirconium sizing nozzle has no crack after molding, and the molding effect is good. The additive can promote the zirconium sizing nozzle. Sintering is beneficial to the increase of density and the decrease of apparent porosity, and the improvement of thermal shock resistance is obvious.? In a nutshell, that is, with the same drawing, heavier the weight is, the longer service life the tundish nozzle is. (2)Zirconia Core a) The content of zirconia of the inner core, we can say that the higher content of zirconia , the better performance will be achieved. b) Length of zirconia core, with the longer zirconia core, the tundish metering nozzle is better. (3)The smooth appearance means superior production process and stable quality. Category of Tundish Nozzle (1)Fully homogeneous sizing nozzle The nozzle is composed of ZrO2 (60%~95%). The higher the content of ZrO2, the stronger the erosion resistance of the nozzle, the longer the service life and the higher the cost. Advantage Uniform chemical composition, good integrity, high strength, corrosion resistance, long service life, safe and reliable. Disadvantage High production cost. (2)Compound sizing nozzle The body is a low zirconium material, mostly zircon material, and the composite is a high zirconia material. The two are directly combined together, molded once and fired together. Advantage The amount of ZrO2 is greatly reduced compared with the homogenizatio type, the production cost is low, the strength is high, and the corrosion resistance is good.? Disadvantage Due to the zirconia content of the inner and outer layers is different, the linear expansion coefficient of the material is different, during use, there will be crackage.? (3)Inlaid sizing nozzle The inlaid sizing nozzle is divided into two parts: the outer casing and the inner core. They are respectively made of refractory mud and bonded together; the nozzle body is generally made of high-aluminum material; the inner core is made of zirconia.? Advantage low production cost and good thermal shock resistance. Zirconia? content can be produced according to different requirements. Economic and good performance. So what’s your answer now? Yes, A is the better choice and that is the one manufactured by CX refractories. Hope that the share is helpful for you to make the right choice in the future.?

We Changxing Refractory Material Co.,LTD is professional manufacturer and supplier of refractory materials for more than 30 years. Our high quality refractory products are good sold to many countries say South Africa, Bangladesh, Indonesia, Malaysia, etc. Shall any interests, welcome to contact us. Our team would make best to be your reliable partner!

Article Source:How to choose tundish nozzles Company name: Henan Changxing Refractory Materials Co.,Ltd More refractory products:https://www.cxrefractories.com/en-product-solution Email:info@cxrefractories.com Website:https://www.cxrefractories.com

[ruizhirefractory]

Furnace lining material and molding material used for smelting high manganese steel in intermediate frequency furnace

We all know that high manganese steel easy to work hardening, which is difficult to process, the vast majority of castings, very small amount of forging processing methods. High manganese steel casting performance is better. The low melting point of steel (about 1400 ℃), steel liquid, solidus temperature interval is small, (about 50 ℃), tundish nozzle low thermal conductivity of steel, so the molten steel flow is good, easy to pour molding. High manganese steel linear expansion coefficient of 1.5 times for the pure iron, carbon steel 2 times, so the casting volume shrinkage and linear high alumina bricks shrinkage are large, prone to stress and crack casting temperature of 1400 + (80- 100) 80-100 to see the situation and the complexity of the casting plant, up to 150. High-manganese steel casting process In the high-energy impact of the working conditions, high manganese gunning mix steel and ultra-high manganese steel casting applications are broad. Many foundries do not have the necessary knowledge to produce such steel castings. Is a brief description of the specific operation for producers of reference. 1, the chemical composition of high manganese steel in accordance with national standards are divided into five grades, the main difference is the carbon content, the range is 0.75% -1.45%. The impact of large, low carbon ramming mass content. Manganese content between 11.0% -14.0%, generally should not be less than 13%. Ultra-high manganese steel is not the national standard, but the manganese content should be greater than 18%. Silicon content of high and low impact on the impact toughness, it should take the lower limit to not more than 0.5% is appropriate. Low phosphorus and magnesia carbon refractory low sulfur is the most basic requirements, due to the high manganese content of natural play desulfurization, it is the most important phosphate, try to make phosphorus less than 0.07%. Chromium is to improve the wear resistance, generally about 2.0%. 2, charge into the furnace material is determined by the chemical composition. The main charge is high quality carbon steel (or ingot), high carbon ferromanganese, medium carbon ferromanganese, high carbon ferrochrome and high manganese steel back to the charge. Here is a reminder of the people think that as long as the chemical composition is appropriate, you can use more with the charge back. This person is harmful. The reason why some plant products of poor quality, are out of this. Not only high-manganese steel, ultra-high manganese steel, all metal castings, must not be too much to use back to the charge, the charge should not be more than 25%. So, what about the excess charge As long as the waste to a minimum, no excess charge back. 3, melting Here focus on the charging sequence, whether in the IF furnace, or electric arc furnace smelting, always smelting carbon steel, and various types of ferromanganese and other precious alloy materials, to be divided into several times, each into the furnace a small, expensive The elements are added at the end to reduce burn. Block should be as small as possible to 50-80mm is appropriate. Melting, the furnace temperature reached 1580-1600 ℃, to deoxidation, dehydrogenation, denitrification, available aluminum wire, can also be used Si-Ca alloy or SiC and other materials. Deoxidizer must be pressed to the depths of the furnace. At this point the metal surface covered with cover agent, cut off the outside air. But also to calm for some time, so that oxides, inclusions have sufficient time to float. However, many enterprises, only aluminum wire or aluminum scrap, and then sprinkle metal surface, and not cover, would not be wasted! During this period, in time to adjust the carbon and manganese to the manganese and carbon content. Before the molten steel is baked, it is necessary to bake the ladle above 400 ℃. In the baked during the V-Fe, Ti-Fe, rare earth and other trace elements to do metamorphic treatment, is to make a crystal refinement of the necessary means, its impact on product performance is essential. 4, charge and molding materials to extend the furnace order, when the distinction between steel and the lining of the property. Manganese steel is alkaline, of course, the use of magnesia lining material. Pounding the lining to turn again and again to change operation. Add lining materials can not be too thick, about 80 cm each time is appropriate, to complete a long time to bake baking. Such as improving production efficiency, I recommend the use of forming crucible, from the demolition furnace ramming into, not 1 hour, you can put into production, while forming the crucible on the benefit of anti-wear furnace. Of course, the length of the furnace and the operator has a great relationship. Many operators like throwing the same athletes, the charge from 34 meters into the furnace outside, not safe and hurt furnace order, the furnace should be placed in the mouth next to the preheat, and then slowly with the clip charge Along the furnace placed in the mouth next to the preheat, and then slowly with the clip along the furnace wall into the furnace. Modeling materials and coatings should also be consistent with the properties of liquid metal, or with ZTE materials (such as chromite sand, corundum, etc.). If you want to get a crystal refinement of the collective, the use of large thermal storage of chromite sand is correct, especially the EPC production plant, with it will overcome the shortcomings of slow cooling. 5, the casting process design Manganese steel is characterized by large solidification shrinkage, heat dissipation is poor, accordingly, in the process of casting shrinkage taken 2.5% -2.7%, casting the more grow up, the more should take the ceiling. Sand and sand core of the concession must be better. Gating system to take open. A plurality of discrete runners are introduced from the thin wall of the casting and have a flat, wide, trumpet-like shape with a cross-sectional area near the casting which is greater than the cross-sectional area associated with the runner so that the molten metal is quickly and smoothly injected into the mold , To prevent the mold temperature difference is too large. Riser diameter is greater than the diameter of the hot section, close to the hot section, the height is 2.5-3.0 times the diameter, must be hot riser or pouring riser, so that sufficient high-temperature liquid metal casting to shrink in the empty space . The sprue, the riser at a high (sand box with 5-8. The slope) is also correct. Pouring as fast as possible low temperature. Once the solidification, to timely loose sand box. Smart designers are always good at using cold iron, including iron in the cold inside the cold iron, which not only refine a crystal, eliminating shrinkage, shrinkage, and improve the process yield, of course, the appropriate dosage and specifications should be considered of. Inner iron to be clean, fusible, the amount of less suitable. The three dimensional dimension of the outer cold iron is a function of 0.6 to 0.7 times the three dimensional dimension of the coolant. Too small does not work, too big cause casting cracking. Casting in the type of long-term insulation, until less than 200 ℃ and then open the box. 6, heat treatment Heat treatment cracking, is the low temperature phase caused by too fast. So the correct operation is below 350 ℃, the heating rate of <80 ℃ / h, 750 ℃ the following, <100 ℃ / h, and have different periods of insulation. To> 750 ℃, the casting was plastic state, you can quickly heat up. To 1050 ℃ according to the thickness of the casting to determine the holding time, and then rose to 1100 ℃ or more. Give the furnace cool down and leave room for water as soon as possible. When the temperature is too slow to heat up, holding time is too short, after baked into the water time interval is too long (not> 0.5min), all of which affect the quality of castings. Water temperature should be <30 ℃, quenching, the water temperature <50 ℃, the water should not be less than 8 times the weight of the casting. Cold water from the pool into the bottom, warm water from the pool top surface outflow. Casting in the pool to keep moving in three directions. 7, cutting and welding Because of poor thermal conductivity of manganese steel, so cut the riser should pay great attention. Casting is best placed in the water, was cutting part of the exposed water, cutting a certain amount of stubble, heat treatment after grinding off. Many plants, welding and welding become inevitable. Selection of austenitic manganese-nickel electrode (D256 or D266 type), specifications slender, φ3.2mm × 350mm, the outer coating is alkaline. Operation using small current, weak arc, a small bead and more welding, and always maintain a low temperature, less heat method of operation. While welding while striking, eliminating stress. Important castings must be inspected. 8, the production considerations Attention to the producers, not only to reduce production costs, but more importantly, no waste, the maximum quality products, and then to maximize the expansion of occupation of market share. This seems to be slow and costly, in fact, fast and provincial, this concept not only recognizes that more important is to do. Third, the use of High manganese steel is designed for heavy industry to provide a use of anti-wear steel, applications include quarrying, mining, mining, coal industry, casting and steel industries. Other First, quarrying, mining, mining and mining industry Gravel, top, hammer, backhoe bucket, conveyor belt, link belt, lifting bucket, quarry truck base, gravel production line, bulldozer, Sandblasting cleaning equipment, waste treatment equipment performance characteristics by anti-wear technology, the material surface can reach 500 - 550 Brinell hardness, continue to maintain the internal Flexibility, surface friction to minimize the available high manganese steel or similar materials for welding, can be acetylene torch cutting, non-magnetic and so on.

[ferrosiliconalloys]

Manufacturer of Zirconia metering nozzle for continuous casting of steel .produced shaped refractory according to coming drawing .

[chinarefractorymaterial]

Use of tundish metering nozzle

metering nozzleThe tundish metering nozzle is one of the refractory materials for billet continuous casting, and it plays the role of controlling the flow of molten steel. The molten steel flows into the mold through the tundish metering nozzle at a constant speed and stably, which is a necessary condition to ensure the normal operation of continuous casting. As a flow control element, the metering nozzle should have good anti-scour and anti-erosion capabilities. Source: http://www.cxfirebrick.com/en/new/use-of-metering-nozzle.html

[chinarefractorymaterial]

Use of tundish metering nozzle

Use of tundish metering nozzle

metering nozzle The tundish metering nozzle is one of the refractory materials for billet continuous casting, and it plays the role of controlling the flow of molten steel. The molten steel flows into the mold through the tundish metering nozzle at a constant speed and stably, which is a necessary condition to ensure the normal operation of continuous casting. As a flow control element, the…

[chinarefractorymaterial]

Tundish Nozzle, Zirconium Sizing Nozzle

Tundish Nozzle, Zirconium Sizing Nozzle

Tundish Nozzle, Zirconium Sizing Nozzle Introduction This tundish nozzle is also called zircon/zirconia metering nozzle, tundish metering nozzle. Changxing Refractory provides the technologically advanced, quality stable, service oriented alumina graphite to serve casting and refining fields. Advantages 1. Changxing Refractory’s zirconia sizing nozzle is custom designed, made from alumina…

[cxrefractories]

Problems and solutions in the use of submerged entry nozzle

After summarizing the actual operating experience, the main reasons for the problems in the use of the submerged entry nozzle and the solutions were found.

Specifically in: 1) Fracture before or during the process of pouring steel at the nozzle. The submerged entry nozzle is about 1 meter long but only fixed by the upper part, so it is mechanically damaged during transportation, hard objects collide with the nozzle during installation, unstable or falling too fast when lifting the intermediate tank, and the impact on the nozzle during the pouring process causes the root fracture. In order to prevent the nozzle from breaking, mechanical collision should be avoided as much as possible during transportation and installation, and the problem should be stopped in time, and a layer of rubber pad should be placed on the intermediate tank seat frame to make the crane take off and land smoothly. 2) The slag line is eroded too quickly. After continuous casting of 7 to 8 furnaces, the slag line of the nozzle, especially the edge of the zirconium zone, was severely corroded and even fractured. Therefore, it is necessary to improve the corrosion resistance and hot and cold strength of the zirconium zone and the transition zone; increase the length of the zirconium zone from 160mm to 210mm, and modify the relative position of the zirconium zone, so that the problem of excessive corrosion of the slag line can be solved solve. 3) Steel seepage at the junction of the separation ring and the nozzle. After continuous pouring of 7 to 8 furnaces, most of the intermediate tanks have molten steel seepage at the junction between the separating ring and the nozzle, and the pouring should be terminated in severe cases. Since the overall submerged entry nozzle is longer and the conical surface at the junction of the nozzle and the separating ring is short, the lower part of the junction cannot squeeze the fire mud tightly. After the fire mud dries, it is easy to produce gaps and reduce the fixing force of the nozzle; In addition, it contains carbon. The product cannot be well combined with the fire clay used, and the spray paint on the upper edge dries and cracks along the outer edge of the nozzle. Based on the above reasons, the original high-aluminum fire clay was changed to aluminum-chromium fire clay. The upper outer edge of the nozzle was first coated with a layer of low cement castable that is easy to combine with the nozzle, and then a layer of paint. At the same time, careful operation is basically eliminated. The problem of pouring due to steel infiltration is solved.

4) Failure of pouring opening caused by nozzle installation. In the case of normal pouring operation, the stopper cannot be opened automatically, resulting in pouring failure. This is mainly due to the cold steel at the junction of the nozzle and the stopper rod, which bonds the nozzle and the stopper rod. In response to this phenomenon, increase the length of the nozzle and require a positive tolerance when making the separation ring. The installation of the nozzle must ensure that the immersion depth and the upper edge of the nozzle are 10-15mm above the surface of the bottom working layer of the tank. The temperature of the baking tank must reach 1050~1100℃. The phenomenon of cold steel in the nozzle is fundamentally solved.

Wanhao is a manufacturer who is specialized in designing various kinds of furnace and making refractory products for electric furnace, ladle, tundish, blast furnace, AOD furnace, IF furnace, etc.

Article Source:Problems and solutions in the use of submerged entry nozzle

More Refractory Products: http://www.wanhaorefractory.com/en/product.html

Website: http://www.wanhaorefractory.com/

[ferrosiliconalloys]

we mainly produced refractory and ally metallurgical raw material to support continuous casting of steel and foundry iron casting

Steel Casting: Refractory tundish nozzle and seat block,alloy cored wires, siliconalloy,silicon calcium,ferro alloy etc.alloy additives for steel smeting, Foundry : inoculant,RE-fesimg  sepcial for ductile casting,Slag remover.