The production process of Magnesium carbon refractory bricks
Mar 13, 2021
Magnesium carbon refractory bricks production process 1-crushing
The purpose of crushing in the process of producing magnesia-carbon bricks is mainly to prepare raw materials of various sizes. Increase the specific surface area of the material and destroy the crystal lattice of the material, causing it to produce defects, thereby speeding up the physical and chemical reaction of the material.
Magnesium carbon refractory bricks production process 2-proportioning raw materials
The gravimetric batching method is usually used in the production of Magnesium carbon refractory brickss, because the gravimetric batching method has high accuracy, generally not exceeding 2%. Commonly used weight batching equipment includes manual weighing scales, automatic weighing scales, weighing carts, etc. The corresponding equipment is selected according to requirements and automatic control levels.
Magnesium carbon refractory bricks production process 3-preparation of mud (mixing, kneading)
The purpose of mixing is to make the composition of the materials uniform and maximize the contact surface between different materials. The mixing of refractory materials is a method to homogenize the materials with the process of extrusion, kneading and exhaust. Like the mixing of any powder, the mixing of refractory materials is gradually carried out, and the mixing process is more complicated due to the composition, particle size, binder and admixture of the materials.
Magnesium carbon refractory bricks production process 4-forming
The purpose of forming is to densify the structure of magnesia-carbon bricks. Since magnesia-carbon bricks are formed by a semi-dry method, they must be formed under high pressure. Due to the small particle size of the mud used for molding and the high content of graphite, the molding must be performed in strict accordance with the regulations, otherwise cracks or delamination are likely to occur. It should be light first and then heavy, pressurize several times, slow down the exhaust with the light hammer, and slowly raise the pressure with the heavy hammer.
Magnesium carbon refractory bricks production process 5- heat treatment (drying)
The heat treatment process of Magnesium carbon refractory brickss not only includes the discharge of water, but also a series of physical and chemical changes, so we call this process heat treatment.
The heat treatment temperature of Magnesium carbon refractory bricks has a direct influence on the performance of Magnesium carbon refractory bricks. The heat treatment process of Magnesium carbon refractory bricks is actually the curing process of phenolic resin. The heat treatment temperature and heat treatment time directly determine whether the phenolic resin is completely cured.
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