Novel high-temperature-resistant magnesia carbon brick and manufacturing process thereof

Abstract

The invention discloses a novel high-temperature-resistant magnesia carbon brick which is prepared from the following raw materials in parts by weight: 8-15 parts of crystalline flake graphite powder, 65-80 parts of fused magnesia granules, 2-4 parts of an additive, 6-10 parts of mullite powder, 1-3 parts of a binder and 5-12 parts of water. Magnesia carbon brick raw materials are put into a pressing mold box; a magnesia carbon brick blank is obtained through mechanical pressing forming; fireproof paint is smeared on the counter-fire face of the magnesia carbon brick blank through a paint roller, specifically, the pressing mold box is aligned with a vertical discharging box after rotating by 90 degrees; a mold box bottom plate and the paint roller are pushed out at the same time through a driving air cylinder; the die box bottom plate pushes the magnesia carbon brick blank into the vertical discharging boxl and the coating roller just smears the fireproof coating on the counter-fire face of the magnesia carbon brick blank in the process that the pressing die box moves backwards to be reset. In the whole process from compression molding to final drying and roasting of the magnesia carbon brick blank, manual work or a machine is prevented from making contact with the surface of the magnesia carbon brick blank, and the quality of the magnesia carbon brick blank is improved.

Description

technical field [0001] The invention belongs to the technical field of refractory material production, and specifically relates to a novel high-temperature-resistant magnesia-carbon brick and a manufacturing process thereof. Background technique [0002] Magnesia carbon brick, commonly known as refractory brick, is a refractory material made of refractory clay or other refractory raw materials. It is mainly used for building smelting furnaces. It can withstand high temperatures of 1580°C-1770°C. It is a refractory material with a certain shape and size. It can be used as high-temperature building materials and structural materials for building kilns and various thermal equipment, and can withstand various physical and chemical changes and mechanical actions at high temperatures. Magnesia-carbon bricks contain graphite that is easily oxidized at high temperatures and binder phenolic resin After baking at 800-1100°C, carbon oxidation will inevitably occur and an obvious decarb...

AI Technical Summary

Problems solved by technology

[0003] In the high temperature working environment, the fire-facing surface of magnesia-carbon bricks is most affected. At present, the most convenient measure to improve this situation is to coat the fire-facing surface of magnesia-carbon bricks with a refractory layer, but the existing production processes are all The material is coated after the magnesia-carbon brick is fired, and the bonding performance between the refractory layer and the magnesia-carbon brick matrix is ​​not very good. In addition, the existing production equipment is various and the process is complicated, which affects production efficiency.

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