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1. When the cement rotary kiln rotating lap, the refractory in the kiln will be exposed to the gas in the kiln once. In addition to the time, the refractory materials are covered by the material, so the kiln refractories hot surface temperature will be subject to periodic thermal shock, which requires the refractory materials in the burning zone have good thermal shock stability. 2. Cement rotary kiln in normal operation, there must have stable burning zone lining brick. And the “kiln skin” can not be too thick or too thin. When the “kiln skin” is too thick, it will affect the normal calcination, affecting production; if the “kiln skin” is too thin, the meting loss of refractory materials is large. So the refractory materials need a good hang "kiln skin" ability. 3. Cement clinker will form silicate liquid phase at high temperature and silicate liquid phase easily penetrate into the refractory fire bricks, resulting in refractory chemical composition and mineral composition changes or even damage. Therefore, refractory materials need have strong resistance to erosion. There have many kinds of refractory products in our factory, such as fire brick for sale, refractory nozzle, refractory raw material, refractory nozzle. Welcome to view our factory to know more refractory products. Article source:
1.Flames or yellow smoke appear from the side of sliding mechanism when burning the nozzle with oxygen; 2.Bright line is spotted between slide gate plate and nozzle or between upper and lower slide gate plate; 3.There is steel in between upper and lower slide gate plate or the diameter of nozzle is more than 6mm wider, or there is obvious cracks on the slide gate plate; 4.The slide gate plate has been out of use for over 2 hours; 5.Nozzle has been filled with steel slag and then dredged by oxygen burning; 6.For certain kind of steel, such as high manganese or with high oxygen, slide gate plate can be only used for one heat; 7.Breakage has been spotted on the nozzle. Welcome to know more kinds of refractory products, there have refractory fire brick, refractory nozzle, refractory raw materials and other refracotry products. Article source:
According to different chemical composition, refractory material can be divided into 3 types: alkaline, acid and neutral refractory material. Alkaline refractory material: Generally refers to MgO or MgO and CaO as the main composition of refractory material. These refractory raw material have high refractoriness, with strong resistance to basic slag, and main are magnesia and dolomitic. Alkaline refractory materials are used in alkaline steel furnace, non-ferrous metal smelting furnace, cement industrial kiln, converter and electric arc furnace. Acid refractory material: Usually refer to SiO2 content more than 93%. Its main feather is that it could resist the erosion of acidic slag at high temperature, but it is easy to react with alkaline slag, and it has poor thermal shock resistance. Main are siliceous, semi-siliceous, clay. Acid refractory material are mainly used in coke oven, glass kiln, acid steel furnace, etc. Neutral refractory material: Refer to the refractory material which is not easy to react with acidic or basic slag, such as clay, high aluminum, carbon, chrome, mullite or corundum refractory material. Neutral refractory material are mainly used in blast furnace, aluminium cell, ferroalloy furnace, molten steel ladle, plating tank, autoclave and so on. There have many kinds of refractory products in our factory. Such as fire brick for sale, refractory nozzle, refractory castable, and so on. When you need any refractory products, welcome to view our website to know more. Artilce source:

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