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GMH Bricks-New refractory material for large cement rotary kilns

Country/Region china
Company Jiangsu Junyao Wear-resisting Fire-resisting Co.,Ltd
Categories Rotary Kiln
Telephone +86-510-87962299
ICP License Issued by the Chinese Ministry
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GMH Bricks-New refractory material for large cement rotary kilns

Introduction of GMH Bricks
The cement industry is witnessing larger rotary kilns and rising output with faster rotation and bigger diameters. Therefore, refractory materials shall have better ability to deal with mechanical stress. We have used magnesite bricks and spinel bricks for burning zones and transitional zones of domestic rotary kilns; anti-stripping, high-tensile, and alkali-resistant bricks are used in preheating zones. These materials can basically meet requirement of kiln operation, but have also shown some shortcomings; due to high heat conductivity coefficient, spinel bricks will raise temperature in the walls of the kiln, imposing high pressure on the riding wheel due to expansion with high temperature on supporting tiles, which will affect normal running of the equipment; the high density of anti-stripping bricks have increased load on the kiln, affecting the power unit; the high-tensile and alkali-resistant bricks which used for preheater and tertiary air duct cannot protect the equipment and save energy due to bad heat insulation. Therefore, our company has made intensive efforts to prolong the life of refractory materials with simultaneous application of them in the whole kiln. As to refractory materials for 2500T/D, 5000T/D, and rotary kilns above the two series, we have conducted detailed technical analysis with reference to leading technologies and theories at home and abroad. Based on the research in refractory materials of kilns, we have developed an alternative product with better technical advantages: silica-mullite-andalusite bricks. We have applied the patent and name it GMH Bricks which the Chinese name is . The new material can fully replace imported spinel bricks and anti-stripping bricks at the kilneye and the front and back transitional zones. The company has accumulated abundant experiences in the reasonable use of refractory materials in the whole cement rotary kiln. After years of wide application by customers in recent years, refractory materials can be simultaneously used throughout the whole kiln.
Product features
As a patent product of our company, GMH bricks are made of super-grade bauxite, silicon carbide, fused white corundum, and andalusite, and formed under high pressure after being fired in the high temperature tunnel kiln with natural gas. The bricks are mainly used to replace spinel bricks, anti-stripping bricks, and other refractory materials on the front and back kilneyes, transitional zones, and preheating zones of 2500T/D, 5000T/D, and rotary kilns above the two series. The product does not fall off and is well resistant to pressure and abrasion with high mechanical strength, long lifecycle, and good energy conservation. With outstanding quality and reputation, we have established the "GMH" brand.
Technical performance

Application of GMH Bricks in 5000T/D large cement kilns
The large size and high daily output of cement rotary kilns have set a high bar for resistance to thermal shock, mechanical stress, and chemical erosion. Based on the 20 years of our production experiences in refractory bricks for rotary kilns, and domestic and overseas leading technologies and theories, our company had developed silica-mullite-andalusite bricks which we name it GMH bricks (Patent No.: 200610097276). The product has high mechanical strength and refractoriness under load, and low heat conductivity with good resistance to fire, erosion, and thermal shock. The product is widely applied in the front and back kilneyes, transitional zones, and preheating zones of 2500T/D, 5000T/D, and rotary kilns above the two series. With over one year operation, the surface temperature of the kiln shell has dropped 60-80℃ with efficient energy conservation and protection of the barrel. The product has effectively improved the operation environment of cement product machine, raised efficiency of large cement rotary kilns, and realizes simultaneous use of refractory materials throughout the kiln.
Main clients: Conch Group, Yatai Group, Huaxin Group, China National Building Material Group, China Resources, Tianrui Group, Liaoyuan Jingang, Tapai Group, Hongshi Holding Group, Jinfeng Group, Qingshi Group, SDIC Hainan, Sichuan Xingchuancheng Cement, and Taiwan Cement.
1. Except the burning zone, and castable of kilneyes and kiln ends, GMH bricks can be applied in all the parts of the large dry cement kiln shell with high mechanical strength and refractoriness under load, low heat conductivity with good resistance to fire, erosion, and thermal shock. This is decided by mechanical features of rotary kilns and features of heating zones: the mechanical strength delivered on the lining refractory bricks due to oval deformation of the kiln shell require high resistance to pressure and bending; As the central part of the rotary kiln, the pre-heating zones needs refractory materials with low h
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