Boiler coal powder machine is one of the most important equipment in thermal power plant, and the grinding roller is the key part of the coal mill, its quality.
The wear resistance is not directly affected by the working rate of the milling, the quality of the pulverized coal, the consumption of the mill roller and the cost of production.
Therefore, the domestic and foreign to improve the grinding roller materials, prolong the service life of a lot of work. However, any grinding stick material, in the flour mill
Under the working conditions, there are more serious wear and tear, the grinding roller in a certain degree of wear, still can work normally, when the wear and tear to reach a certain limit
After the degree, the outer circle is too small to scrap.
In China's thermal power plant coal mill grinding roller spray machine mostly adopts high chromium cast steel and high chromium cast iron and high carbon high chromium materials, it
They have better wear resistance at certain temperature, so it is widely used in domestic power plants. However, its production needs to have steel making, casting, hot
Processing, machining and other processing procedures, long production cycle, high scrap rate, and a purchase of the capital occupied by large, wear is also more serious.
In recent years, domestic and foreign research in the study of composite cast iron, centrifugal casting and welding grinding roller, etc.. The purpose is to create a new complex
The grinding roller and the working surface of the grinding roller are respectively satisfied with the requirements of anti impact, wear resistance and other properties of the grinding coal. Surfacing with grinding roller surface
Has also become a major development direction and means to manufacture and repair the grinding roller and improve the service life of the grinding roller at home and abroad.