Zirconium Sizing Nozzle ,Metering Nozzle,Nozzle Refractory

The company developed Zirconium sizing nozzle, specially used in small billet caster tundish no plug stem gating system,and it is more suitable for small billet cc, nozzle adopt the Special high-quality selection of raw materials, reasonable structure, strong erosion resistance, small change of the nozzle diameter and stable speed in the casting process, according to the customers’ request, we can supply inlaying, compound and different types of nozzle products.

Nozzle,Nozzles Refractory,Nozzle Manufactur|Luoyang Yilong Refractory Co,Ltd

Ladle Nozzle

Introduction

Ladle Nozzle are made from corundum, bauxite, flake graphite, antioxidant and phenolic resin formed on heavy duty presses in harden steel or carbide die by using white fused alumina. To obtain maximum packing density, nozzles are fired at extremely high temperature in order to increase corrosion resistance to metal and slag the fired nozzles are further processed.

Advantages

They show the features of excellent thermal shock resistance, good excellent corrosion and erosion resistance, strong cracking resistance, long service life etc.

Application

These products have been widely used in steel plant.

Stopper type metering nozzle quick-change casting equipment

Stopper type metering nozzle quick-change casting equipment

Ten years ago, our company took the lead in developing the tundish metering nozzle quick-change patented technology. This technology can greatly extend the functional life of the flow control by multiple times of change of metering nozzle in one-time casting tundish, and then improve the continuous casting time and continuous casting furnaces of tundish, extending the life of tundish to more than 60 hours, thereby improving slab quality and yields, as well as the production efficiency, and reducing refractory consumption and production costs, as well as labor intensity. However, the casting speed changes within a certain range, so it can only be applied to the production of ordinary steel.

The “stopper metering nozzle quick-change casting equipment” researched and developed by our company integrates metering nozzle quick-change technology and stopper flow control technology, which is applied to the production of high quality steel and alloy steel by concentrating its strong points, to achieve stable pull-speed of casters, while extending the life expectancy of tundish up to more than 40 hours. And the stopper metering nozzle quick-change technology significantly improves the quality of slabs and yields, as well as production efficiency, and reduces production costs. The project obtained two utility model patents for stopper type metering nozzle quick-change casting equipment granted by the Intellectual Property Office of the People's Republic of China on February 13, 2008.

Zirconium Sizing Nozzle,Nozzle Refractory,Nozzle Products,Nozzle Design

The company developed Zirconium sizing nozzle, specially used in small billet caster tundish no plug stem gating system, and it is more suitable for small billet cc, nozzle adopt the Special high-quality selection of raw materials, reasonable structure, strong erosion resistance, small change of the nozzle diameter and stable speed in the casting process, according to the customers’ request, we can supply inlaying, compound and different types of nozzle products.

Advantage: 1.Washout resistance 2.Strong erosion resistance 3.High strength

Metering nozzle,Metering Nozzle Refractory,Nozzle Products,Nozzle Refractory

The Zr metering nozzle manufactured by this company is specially used for the tundish gating system without plug stick in the small square-base continuous casting machine, and it is more suitable for multi-thread and small square-base continuous casting machine. All nozzles adopt special-type and high-quality refined raw materials with reasonable structure and strong erosion resistance. In the entire course of pouring, there is little change in diameter of the nozzle with stable speed. Nozzles of the mosaic type, combined type and entire difference type can also be provided as required by customers.

Metering Nozzle,Nozzle Refractory,Nozzle Products,Metering Nozzle Refractory,Nozzle Design

The Zr metering nozzle manufactured by this company is specially used for the tundish gating system without plug stick in the small square-base continuous casting machine, and it is more suitable for multi-thread and small square-base continuous casting machine. All nozzles adopt special-type and high-quality refined raw materials with reasonable structure and strong erosion resistance. In the entire course of pouring, there is little change in diameter of the nozzle with stable speed. Nozzles of the mosaic type, combined type and entire difference type can also be provided as required by customers.

Submerged Entry Nozzle,Nozzle,Nozzle Refractory,Nozzle Design,Nozzle Product

Based on functions, the submerged entry nozzles manufactured by our company are classified into plug-in type, hanging type and fast renewal type; and based on material quality, nozzles mainly classified into aluminum carbon, zirconium carbon and magnesia carbon. This product enjoys performances of purifying liquid steel, prevent liquid steel oxidation, with good liquid steel washing resistance and erosion resistance

Zirconium Sizing Nozzle,Nozzle,Nozzle Refractoy,Nozzle Design,Nozzle Produscts,Metering Nozzle

The company developed Zirconium sizing nozzle, specially used in small billet caster tundish no plug stem gating system, and it is more suitable for small billet cc, nozzle adopt the Special high-quality selection of raw materials, reasonable structure, strong erosion resistance, small change of the nozzle diameter and stable speed in the casting process, according to the customers’ request, we can supply inlaying, compound and different types of nozzle products.

Nozzle,Tundish Nozzle,Long Nozzle,Tundish Long Nozzle,Alumnium Carbon Long Nozzle,Nozzle Refractory @en1.chinaelong.com

Based on function categories, the long nozzles manufactured by our company are classified into preheating nozzle, non-preheating nozzle, argon blowing nozzle and not argon blowing nozzle, and based on material quality, nozzles mainly classified into aluminum carbon, aluminum-zirconium carbon and aluminum-magnesia carbon. This product is provided with good liquid steel washing resistance performance and liquid steel erosion performance in the course of use, which can effectively prevent oxidation of air to liquid steel and its spatter.

Methods of Eliminating the Phenomenon of Ladle Nozzle Clogging

      A ladle nozzle is one of the slide gate ceramic elements. Systematic extension of the length of the steelmaking ladle campaign increases the demands on a ladle nozzle. The ideal solution would be a ladle nozzle which withstands the entire ladle campaign. In addition to thermal stability, ladle nozzles must be characterized by high resistance to corrosion and erosion caused by the flow of steel. An important factor affecting the durability of a ladle nozzle is clogging due to steel deoxidation products deposition in the nozzle channel. The phenomenon of clogging makes it difficult to regulate the rate of steel outflow from the ladle and, in extreme cases, can make the nozzle channel close. Clearing the nozzle by oxygen lancing accelerates its destruction.
Methods to prevent clogging:
 1. Ladle Refining Practice. A vacuum degassing treatment yields better cleanliness than does argon bubbling.
2. Reoxidation Prevention. Submerged ladle-to-tundish pouring, shielded tundish surface, ann leak-tight refractory joints will reduce exposure of the steel to oxygen and thereby improve cleanliness.
 3. Oxygen absorber Prevention.Optimal tundish flow patterns as well as filtration and electromagnetism techniques can remove Oxygen absorber products from the melt.
 4. Flux Enrainment Prevention. Submerged ladle-to-tundish pouring and avoidance of ladle slag carryover will reduce the amount of exogenous inclusions in the melt.

The requirements of refractory sliding nozzle

Sliding nozzle mainly stalled in the bottom of ladle, whose applied condition has got a big improvement comparing with plug, as its refractory part does not soak in molten steel for a long time. To sliding nozzle, slide gate is the key section, as its quality influences life span of nozzle directly.

The lower/upper nozzle only as a role of alleyway for steel running, but the upper nozzle is required to resist high temperature and eroding, which has the same life span of ladle well block. The lower nozzle is only used for one time, so which holds less demand than upper nozzle.

Both of upper/lower sliding plate are beard fastening pressure, and also required to slid and no molten steel overslow between them when pouring. So it is required to take finish machining to slip plan of upper and lower sliding plate, to make sure high parallelism and smoothness, besides, both of them are required rather high mechanical property.

Now the material of sliding plate mainly include: High alumina, Magnesia, Aluminum silicon carbide, Aluminum chromium, Aluminum carbon, and Aluminum zirconium carbon.

Above materials can be made into burned and unburned skateboarding brick.

As high quality sliding plate is expensive, one can choose  compound sliding plate, which is more appliable and economical.