QN-JM series special insulating refractory bricks are the latest high efficiency and energy-saving products developed by our company refer to foreign advanced standard. They are ideal refractory lining and insulating materials for special industrial furnaces in the industries of metallurgy, petrochemicals, building, machinery etc. The products can be used as insulating layer or as working lining where there is no erosion caused by high-temperature molten mass. Approved results have been achieved when the insulating products were used in metallurgical industry for hot galvanizing furnaces, silicon steel treatment furnace, hot blast furnaces and in petrochemicals industry for ethylene cracking furnaces, hydrogen making furnaces, one-stage converters, Sulfur recovery devices, and also in other heat engineering equipments such as rolling kilns, shuttle kilns, anti-nit riding and ant carbonizing furnace.

The main features of the products:
1) Low content in iron, alkali metal and impurities, good high-temperature properties, effective resistance to reduction atmosphere.
2) Homogeneous structure, light weight, high crushing strength, good insulating properties, energy-saving because low heat storage in the furnace body during cooling and heating process.
3) High strength, good volume stability and thermal shock resistance under high temperature.
4) Less dimension tolerance due to grinding and shaping after sintering, that will meet construction requirements.