As the heat treatment equipments of industry, the furnaces and kilns are common in the industry. They are widely used in the industry field. With the rapid development of the second industry, there are increasingly demand on the building material of the furnaces and kilns such as the refractory bricks and the refractory castables. However, due to the different conditions on each part of the furnaces and the kilns, various refractory products with different performances will be applied on each part of the furnaces and the kilns. For instance, the outer layer and roof will be built with lightweight refractory materials in order to prevent energy loss.
To meet various demand of the industry producing, there are many kinds of high temperature furnaces and kilns such as the blast furnace for steel making, the cement rotary kiln for sintering clinker and the soaking furnace for heating steel ingot. Generally speaking, industrial factory producing different products is built with different construction materials. As for the reason, on one hand, the producing process may carry on various chemical reactions and produce slag and waste material with abrasion, which will be harmful to the furnaces and kilns. On the other hand, the temperature inside the furnaces and kilns differs from each other, which needs refractory construction materials with various refractory temperature.
As for the insulating layer of the furnaces and kilns, it is built with lightweight refractory materials. As we all know, the outer layer of the furnaces and kilns plays a role of thermal insulation, which is built to prevent energy loss and decrease energy consuming and thermal insulation. There are several types of insulating materials such as the lightweight refractory castable, lightweight refractory bricks and lightweight refractory balls, lightweight refractory aggregate and so on. Each of them can be applied to the different type of furnaces and kilns according to specific conditions. For instance, the lightweight refractory castable can be applied to the furnace roof, which possesses sound overall structure performance, low bulk density and lightweight.
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