Preparation method for metal-based ceramic composite material grinding roller of vertical grinding machine

Abstract

The invention provides a preparation method for a metal-based ceramic composite material grinding roller of a vertical grinding machine. A grinding roller base body is sleeved with a roller sleeve which is composed of a high-chromium alloy lining plate and a ceramic lining plate made of a metal-based ceramic enhanced material, wherein the metal-based ceramic enhanced material is composed of 10%-40% of corundum and 60%-90% of iron powder; the high-chromium alloy lining plate and the ceramic lining plate, and the roller sleeve and the grinding roller base body are solidified into a whole body by pouring steel liquid; the preparation method of the grinding roller comprises the following steps: when the corundum and the iron powder are mixed and combusted until the iron powder is completely smelted, the mixture of the corundum and the iron powder is put into a mould for preparing the ceramic lining plate; the ceramic lining plate is placed in a groove in the high-chromium alloy lining plate and the steel liquid is poured to prepare the roller sleeve; the grinding roller base body is sleeved with the roller sleeve and the steel liquid is poured so that the roller sleeve and the grinding roller base body are solidified into the whole body. According to the preparation method, the steel liquid can be immersed into ceramic grains in the ceramic lining plate and covers the ceramic grains so that a ceramic phase and a metal phase are uniformly distributed; the residual porosity after baking is reduced and the wear resistance is high.

Description

technical field [0001] The invention relates to the technical field of cement vertical mills, in particular to a method for preparing a vertical mill metal-based ceramic composite grinding roller. Background technique [0002] In coal, metallurgy, mining, electric power, building materials, refractory materials, energy and other industries, especially in the powder processing fields such as cement, the pulverizing system needs to use the mill, and the grinding roller of the mill is the main wear part, and its operation is good. The failure determines the economic benefits of the enterprise to a certain extent, and in the cement industry, vertical mills are generally used in large quantities. The wear-resistant blocks on the grinding rollers in the existing vertical mills are mostly made of high-manganese steel, high-chromium cast iron and other metals, and have good toughness. However, due to the use of surfacing welding technology, the surfacing welding equipment is expens...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problems such as the use of wear-resistant ceramic blocks in the prior art vertical mill, complicated preparation process, large sintering residual porosity, high brittleness, strong crack sensitivity and short service life in the finished product. Provided is a method for preparing a metal-matrix ceramic composite grinding roller for a vertical mill

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