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.

How to Build a Solid Arch Ceramic Kiln with Castable Refractory

How to Build a Solid Arch Ceramic Kiln with Castable Refractory

       Kilns can be built out of many things and castable refractory is one of the materials we rarely consider. Perhaps it should be considered more since the castable is reasonably priced, easy to mix, and easy to use.

      As John Britt explains in today’s post, if you are comfortable with casting plaster and making molds, you can handle building a solid arch kiln with castable refractory. – Jennifer Harnetty, editor.

Casting an Arch

     Determine the size of your arch and cut enough expanded polystyrene arch pieces to form the entire arch. Set it on four-inch “legs,” which can be dropped out after casting. Make the exterior wooden mold form by cutting two identical arch pieces out of 3⁄4-inch plywood that are longer than the foam arch by the thickness of the kiln wall. Establish the length of the kiln and cut three 2×4s to that length, attaching two to the bottom sides of the plywood arch forms and one at the top (the top 2×4 is visible in image #1). Fill this form with the polystyrene arches.

      Mix the castable, paying specific attention to the manufacturer’s instructions. You can use a commerical castable, Pryor-Giggey Phlocast 30 Low cement, and added Rib-Tec 400 1-inch stainless steel pins. Use approximately four pounds of steel pins per 100 pounds of castablerefractory. When mixing, wear a respirator and use thick gloves—the castable is caustic and the pins are sharp.

    Pour the castable in 4-inch-high sections made from 3⁄4-inch plywood strips so the castable refractory don’t bow, being sure to pack down and smooth out each section. Form a V-shaped groove at the top of each section and let the castable refractory harden. Separate each section with plastic wrap before repeating—the plastic creates an expansion joint. After the castable castablehas cured for 24 hours, take the outer plywood off and drop the legs out from underneath, allowing the interior expanded polystyrene forms to drop out.

Above ways just for your reference.

Application and development of reproducing alumina magnesia carbon brick

     Alumina magnesia carbon brick, with Al2O3, MgO and C are carbon-containing refractory as a main component. Containing Al2O3 60% ~ 69%, MgO7% ~ 14%, C5% ~ 12%. It has good slag resistance and thermal shock resistance; there are trace amounts of heavy firing expansion. To enhance its antioxidant activity, may be appropriate in the ingredients of Si powder, Al powder, Sic powder or ferrosilicon powder additives to the resin as binder, pressure forming, after 200 ~ 300 ℃ can be used without calcined. They are characterized by high strength, good corrosion and erosion resistance, spalling resistance. Alumina magnesia carbon brick is mainly used for large converters and ultra-high power electric furnace ladle refining furnace lining and so on. It is a good refractory lining materials for ladle wall and bottom.
      Alumina magnesia carbon brick is mainly used as a ladle lining brick and taphole brick. In recent years, it gets good results after application in several steel mills. Such as in Zhengzhou the first steel mill, 5 tons EAF and 15tons ladle. The service life is usually about 60-70 times. It saves cost and improves economic efficiency.
      The reproducing alumina magnesia carbon bricks were prepared with the dumped bricks as starting materials. The bulk density, apparent porosity, crushing strength, modulus of rupture and slag resistance of the specimen were analyzed. The results show that the used refractories can be reused and recycled by the right method. The reproducing alumina-magnesia-carbon bricks with better abilities were prepared!
      In a word, the development prospect of alumina magnesia carbon brick is broad. They will be widely used in electric furnace and converter of steel plant in the future. The economic efficiency is remarkable.

Global and China Refractory Material Industry Report, 2010-2011

Global and China Refractory Material Industry Report, 2010-2011 

 

      Vigorously fueled by such high-temperature industries as steel, cement, glass, and nonferrous metal in recent years, the output of refractory material in China climbed to 28.08 million tons in 2010 from 14.77 million tons in 2003, with the CAGR of 9.6%; hereinto, the energy-saving and eco-friendly unshaped refractory contributed more than 1/3. Meanwhile, the export volume of refractory product increased substantially from 827 kilotons in 2003 to 1792.8 kilotons in 2010, with the CAGR of 11.7%.
      The necessary refractory material for cement industry, the second largest consumption field of refractory material, mainly cover basic refractory material (magnesite brick, magnesite-chrome brick, magnesite-alumina brick, etc.), Al-Si refractory material (high alumina brick, fireclay insulating brick, etc.), and heat insulation refractory material. Wherein, magnesite-chrome brick is most commonly employed in cement kiln firing zone; nevertheless, chromium ion brings about serious pollution against high temperature, magnesite-chrome brick has therefore been gradually replaced by chrome-free refractory material like dolomite brick and magnesia spinel brick in recent years.
      Apart from the supply and demand of refractory market, this report underlines not only the market segments of fusion-casting refractory, basic refractory material, unshaped refractory material, and ceramic fiber but the industrial competition pattern including regional pattern and enterprise pattern.
      Refractory production bases have gradually taken shape in Henan, Shandong, Liaoning, and Shanxi, centering on the characteristics of various raw mateiral origins. In 2010, the output of the above mentioned four bases contributed 87.9% to the national total, of which, Henan ranked the first with approximately 50% share. Liaoning is abundant in magnesium ores and it produced 5.53 million tons of refractory in 2010; hereinto, magnesia refractory registered 5.45 million tons.

Silicon Carbide Refractories

Silicon Carbide Refractories

 

     articles produced from silicon carbide (carborundum) and additives, containing between 20-35 and 70-98 percent SiC.
     Silicon carbide refractories are classified, according to the method of bonding the silicon carbide granules, as siliceous (formed in the oxidation of carbide), nitride (Si3N4), oxynitride (Si2ON2), and aluminosilicate, as well as recrystallized and self-bonded. The products are formed on presses (or by other methods) from powdered mixtures containing silicon carbide and subsequently fired at 1300°-1550°C (certain types at 2000°-2200°C).
     Silicon carbide refractories exhibit high thermal conductivity: 7-17 watts per (m.°K) at 800°C. As a result, they show good thermal stability. They are also resistant to deformation at elevated temperatures. At 130O°-1500°C in an oxidizing medium they undergo gradual oxidation, particularly in the presence of an excess of oxygen and of water vapor. Silicon carbide refractories are used in recuperators, retort furnaces, nonferrous-metal-lurgy plant units, shelves of tunnel wagons (in firing porcelain and ceramics), and boilers.