When refractory materials are used in cement rotary kiln construction, the refractory materials need to have the following conditions: contact high temperature resistance and wear resistance, stable chemical properties, resistance to corrosion by chemicals in the flue gas, thermal shock resistance stability, and porosity resistance. When refractory materials can meet these requirements, can they be better used in cement rotary kilns refractory.
The kiln lining in front of the cement rotary kiln is one of the weaker parts in many rotary kilns. When the rotary kiln is in the production process, the operating cycle of the kiln mouth lining strictly limits the life of the entire kiln. Moreover, during the construction of the kiln lining part, the project is more complicated, and the corundum wear-resistant castable is generally used for the pouring construction. Corundum wear-resistant castable not only has strong wear resistance, high refractoriness, but also has good chemical resistance and thermal shock resistance. More importantly, it is easier to construct with refractory castable. Such conditions can make the life of the boiler easier to extend. Investigations show that the average operating life of the parts constructed with corundum wear-resistant castable exceeds 8 months.
Silica bricks-cement kiln refractory bricks are used for the cooling zone 1m and the differentiation zone 5m; the preheating zone 21.4m uses anti-falling high alumina bricks; the firing zone 25m uses magnesia chrome bricks; the transition zone 20m uses spinel bricks; The 0.8m section of the cement kiln is the cooling zone and the transition zone of the second volume, and you can choose to use silica bricks or HMS high wear-resistant cement rotary kiln refractory bricks
Compared with the traditional rotary kiln before, the temperature at the tail of the small kiln is generally less than 1000°C, and even 700°C or so; the temperature at the tail of the large kiln is as high as 1100°C, and the kiln tail generally does not have skinning Phenomenon. For raw meal with high alkali content or a small amount of coal with high sulfur content, repeated evaporation and accumulation of alkali and sulfur, chlorine and other components make the components form characteristic minerals that are crusted and attached to the The cement kiln refractory lining material forms a crust, which greatly affects the operation of the boiler. And through our continuous attempts, in recent years, when the rotary kiln uses steel fiber wear-resistant castables or high-aluminum wear-resistant castables, it will be well improved.
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