Method for preparing composite ceramic alloy layer on grinding roller/lining tile through plasma wire filling and powder feeding

Abstract

The invention relates to a method for preparing a composite ceramic alloy layer on a grinding roller / lining tile through plasma wire filling and powder feeding in order to effectively solve the problems of poor surface wear resistance and short service life of the grinding roller / lining tile of a medium-speed coal mill / vertical cement mill. The method comprises the steps of firstly, mounting equipment, carrying out clearing and interior flaw detection on the worn surface of the grinding roller / lining tile to be subjected to fusion covering, mounting the grinding roller / lining tile on a positioner of the equipment, and placing a plasma torch on a place 20-30mm away from the upside of the worn surface of the grinding roller / lining tile to be subjected to fusion covering; then, starting power sources of the positioner and the plasma torch, an argon storage tank, a water chiller, a wire feeder and a powder feeder to work under the control of a controller, delivering welding wires and ceramic powder to the worn surface of the grinding roller / lining tile to be subjected to fusion covering by using the wire feeder and the powder feeder, and enabling the welding wires and the ceramic powder to be fused and covered on the worn surface of the grinding roller / lining tile under the fusion of the plasma torch to form a wear-resistant ceramic alloy layer. The method provided by the invention is easy to operate, high in work efficiency, good in effect and capable of effectively improving the wear resistance of the grinding roller / lining tile, greatly prolonging the service life of the grinding roller / lining tile and saving the cost.

Description

technical field [0001] The invention relates to machinery, in particular to a method for preparing composite ceramic alloy layers on grinding rollers and lining tiles by plasma wire filling and powder feeding. Background technique [0002] The manufacture of pulverized coal is an important link in the production of thermal power plants. The medium-speed roller mill developed in the 1960s is gradually replacing the traditional steel ball coal mill with its outstanding advantages of high efficiency, energy saving, safety and reliability, and has become an important equipment for thermal power plants. Due to the variety of coal used in domestic power plants, high impurities, and poor grindability, the quality of grinding rollers and lining tiles, the important parts of medium-speed coal mills, especially their wear resistance, directly affects Milling operating rate, pulverized coal quality and production cost. At present, the service life of the grinding rollers used in dome...

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Problems solved by technology

[0006] In view of the above situation, in order to overcome the defects of the prior art, the object of the present invention is to provide a method for preparing a composite ceramic alloy layer on grinding rollers and lining tiles by plasma wire filling and powder feeding, which can effectively solve the problem of medium-speed coal mills, cement The problems of poor wear resistance and short service life of vertical mill rollers and lining tile surfaces

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