yixing xinwei leeshing refractory materials co.,Ltd
Excellent quality, Customer first, Common development
Add to Cart
1800 degree refractory brick Magnesia chrome brick China low price high performance for RH dip tube
Magnesia chrome brick used for RH furnace lining dip tube
1. The inner lining of the dip tube is scoured by the high-speed moving molten steel (containing a small amount of slag), and the temperature in the steelmaking gap drops sharply, the temperature fluctuation is large and the time is short; during steelmaking, the dip tube is immersed inside and outside the high temperature molten steel and slag. , the most severe conditions of use.
2. The steel slag contains high CaO and F, and contains a certain amount of TiO2 and V2O5. This slag has low viscosity and low melting ratio, which is easier to penetrate and destroy the structure of the refractory.
3. The working lining is made of semi-rebonded magnesia-chrome brick XBMGe-20, the gap with the steel structure is filled with corundum self-flowing material, and the periphery of the dip tube is high-purity corundum-spinel castable. Dip tube pouring. Strictly bake after assembly, then weld on site and enter the preheating baking procedure of the steel mill.
| Item | CRE-65/50 | CRE-65/70 | CRE-51 | At the same time, it provides supporting aluminum-silicon castables and nano-insulation boards. and other auxiliary materials | |
| Refractoriness (℃) | ≥1750 | ≥1750 | ≥1750 | ||
| Chemical composition(%) | F.C | ≥8 | ≥5 | ≥14 | |
| AL2O3 | ≥53 | ≥62 | ≥51 | ||
| SiC | ≥4 | ≥4 | ≥8 | ||
| SiO2 | ≤27 | ≤23 | ≤18 | ||
| Bulk density(g/cm3) | ≥2.7 | ≥2.85 | ≥2.7 | ||
| Apparent porosity(%) | ≤10 | ≤10 | ≤7.5 | ||
| Cold strength (Mpa) | ≥40 | ≥45 | ≥40 | ||
Company Profile:
Our mainly partner
FAQ
1. What are refractory products?
Refractory products refer to functional materials which can resist high temperature or even ultra-high temperature. They are widely used in various high temperature heat treatment equipment, such as steels-melting kiln, glass kiln and cement kiln. The quality of refractory products directly affects the usable life of kilns and the quality of the final industrial output. Refractory products are made from various natural minerals such as silica, dolomite, graphite, zircon, magnesia, high aluminium ore and chrome ore through numerous technical refining processes. They have valuable features such as high-heat insulation, high-heat resistance, high strength, high hardness, good volume stability, oxidation resistance, excellent complexity, wear resistance, corrosion resistance, etc.. Some refractory products even have special features such as high ventilation, heat conduction and extreme hardness.
2. Any differences between shaped and unshaped refractory products?
Shaped refractory products can be pressed into bricks and are, generally used in building heat treatment equipment such as metallurgical kilns. Unshaped refractory products refer to fire-resistant casting materials. They can be moulded into whatever shapes and are suitable for building different high temperature furnaces and using as the lining in different heat treatment furnaces.
Our Services:
• Whole package refractory linings design for the kilns;
• Efficient and economical refractories recommendations;
• Provide the sample properties test report from authority institute (SGS or CNAS);
• Kilns linings installation supervision, inspection, evaluation on site;
• Offer measurement of the changes of the roundness in the rotary kiln shell during operation (Ovality measurement).
• Cooperated research and development, provide the best suitable products for different working conditions of the kilns;
• Has logistics company with great advantage in logistics and shipping