Preparation method for common casting iron-based ceramic composite vertical grinding roller

Abstract

The invention discloses a preparation method of a vertical mill roller made of ordinary cast iron-based ceramic composite material. Provided is a method for preparing a vertical mill roller made of ordinary cast iron-based ceramic composite material, which is beneficial to the impregnation of high-chromium cast iron in molten iron, one-time pouring molding, simple process implementation, adjustable composite layer shape and thickness, and improved wear resistance. It includes the following steps: 1) Select 2-4mm fused zirconia corundum particles; 2) Prepare the arc-shaped honeycomb zirconia corundum ceramic particle preform from the above fused zirconia corundum particles, and cool it for use; 3) Arrange the prepared preforms side by side Place it on the arc surface of the sand mold cavity of the vertical mill roller, and fix it with the core support; 4) After closing the box, use a hot air blower to preheat the cavity, then cast it, and take it out of the box; 5) Put the above The obtained iron-based ceramic composite material vertical grinding roller is subjected to heat treatment. The invention has simple process; the composite grinding roller is formed by one-time pouring; the production process can realize mechanized operation, the production cost is low, and the production efficiency is high.

Description

technical field [0001] The invention relates to a preparation method of a vertical mill roller made of ordinary cast iron-based ceramic composite material. Background technique [0002] Metal-based wear-resistant materials are widely used in electric power, mining, metallurgy, building materials and other industries due to their good thermal conductivity and impact resistance. At present, the metal wear-resistant materials commonly used in the preparation of vertical grinding rollers include high-chromium cast iron, high-manganese steel, etc. High-chromium cast iron has high hardness and certain toughness, and is widely used in mining, metallurgy, building materials and chemical industries. Researchers have done a lot of work on improving the mechanical properties and wear resistance of high chromium cast iron and expanding its application, and achieved good results. However, when high-chromium cast iron is applied to vertical mill rollers of coal mills, there are still sho...

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Problems solved by technology

[0004] Ordinary pouring method requires secondary pouring or even more, the process implementation is more complicated, and cracks are prone to appear at the splicing parts of the wear-resistant composite inserts, and the strength of the grinding roller is insufficient; the performance of the composite grinding roller prepared by the centrifugal casting method is better, However, the process is complicated, and the casting equipment is very demanding, and the cost of preparing ceramic grinding rollers for different types of coal mills will be very high.

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