Unfired ferro silicon nitride-alumina composite carbon-free sliding plate and preparation method thereof

Abstract

The invention relates to an unfired ferro silicon nitride-alumina composite carbon-free sliding plate and a preparation method thereof, belonging to the field of refractory materials. The sliding plate is composed of the following raw materials in percentage by weight: 55-90% of corundum, 0-20% of activated alumina, 0-30% of ferro silicon nitride and phenolic resin accounting for 2-6% of total dosage of the raw materials to serve as a binding agent. The preparation method comprises the steps of: weighing the raw materials according to the proportions, uniformly mixing the raw materials, smelting the raw materials to obtain pug, pressing forming the pug, and the drying the pug at 120-600 DEG C for 5-25hours. The product is of an oxide-non oxide composite structure and has the following excellent physical performance indexes: the apparent porosity is 3-11%, the bulk density is 3.0-3.35g / cm<3>, the normal temperature compressive strength is 100-260MPa and the high temperature flexural strength is10-50Mpa. The product provided by the invention needs no high temperature firing and oil immersion procedures, so that the production cost is greatly reduced.

Description

technical field [0001] The invention relates to preparing a sliding plate for steelmaking and continuous casting, in particular to a non-fired ferrosilicon nitride-alumina composite carbon-free sliding plate for clean steel continuous casting and a preparation method thereof, belonging to the field of refractory materials. Background technique [0002] Ferrosilicon nitride is a composite material of silicon nitride, iron and ferrosilicon. It is generally synthesized by using FeSi75 iron alloy as raw material through high temperature direct nitriding. The appearance of ferrosilicon nitride realizes the low-cost production of nitrides. The reason is that The silicon source for synthesizing nitrides uses relatively cheap FeSi75 iron alloy to replace expensive metal silicon. [0003] At present, the mainstream products of skateboards in modern iron and steel enterprises are aluminum-carbon and aluminum-zirconium-carbon skateboards, and the production process requires high-temper...

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to prepare a non-fired ferrosilicon nitride-alumina composite carbon-free sliding plate that does not require high-temperature firing and oil immersion, which overcomes the poor oxidation resistance of existing carbon-containing sliding plate materials and the pollution of molten steel , the metal composite slide contains a large amount of AlN, Al 4 C 3 The products have defects such as serious hydration at room temperature; the production process is simplified and the production cost is greatly reduced