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Description:
The bulk density of GM series lightweight heat-insulating brick is 0.5～1.25g/cm³. Working temperatures range from 1250℃ to 1600℃ . Each grade of products has unique design to meet different thermal, physical and chemical demands.
GM series lightweight heat-insulating bricks are made from good quality and super-pure raw materials, with strictly classified fillings according to their grades. These fillings can form a uniform pore structure after burnt during the process of manufacture.
Each face of the brick is machined to the required accurate size.
Features:
● Low thermal conductivity
GM series lightweight heat-insulating bricks have an excellent feature of heat-insulation.
● Low heat capacity
GM series lightweight heat-insulating bricks store very little heat because of their characters of lightweight and low thermal conductivity, which causes good energy saving especially in batch operation.
● Low content of impurities
GM series lightweight heat-insulating bricks have high refractorieness with low content of iron and alkali-metal. High content of alumina enables them to maintain nice performances in reducing atmosphere.
● High hot compressive strength
● Accurate size
Accurate sizes of the bricks and thin brickwork joints expedite bricklaying and guarantee brickwork’s high intensity and good stability.
● The bricks can be processed into special shapes to avoid the joints and the number of bricks .
Application:
The refractory linings of hot surfaces or backing heat-insulating layers of other refractory materials. The refractory linings or heat-insulating materials of the industrial furnaces in the petroleum or chemical industries , such as , ethylene pyrolysis furnaces, tubular furnaces, reforming furnaces of synthetic ammonia, gas generators and high-temperature shuttle kilns, etc.

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GM-28 lightweight heat-insulating bricks’ main physical and chemical properties