Silicon mullite iron brick

Abstract

The invention relates to a silicon mullite iron brick, which can effectively solve the problems of low strength, low wear resistance, low thermal shock resistance and high thermal conductivity. The silicon mullite iron brick is made of the following components in percentage by weight: 10-15 percent of high-aluminum clinker powder with Al2O3 mass content being more than 87 percent and grain size being 2-4mm, 35-40 percent of high-aluminum clinker powder with Al2O3 mass content being more than 87 percent and grain size being 1-2mm, 15-20 percent of silicon carbide powder with SiC mass content being more than 97 percent which passes through a 200-mesh sieve, 8-15 percent of high-iron and high-aluminum clinker powder with Fe2O3 mass content being more than 6 percent which passes through a 300-mesh sieve, 8-13 percent of fused white corundum powder with Al2O3 mass content being more than 98 percent which passes through a 300-mesh sieve, 8-10 percent of soft refractory clay with Al2O3 mass content being more than 30 percent which passes through a 200-mesh sieve, wherein the total of the components is 100 percent. A method for making the silicon mullite iron brick comprises the steps of using the components as basic raw materials and then adding binder. The silicon mullite iron brick has the advantages that the formula is scientific, the raw materials are rich, the method is advanced, the operation and the production are easy to conduct, the product quality is good, the rate of finished products is high, the utilization ratio of raw materials is high, the silicon mullite iron brick can be effectively used for large-sized and medium-sized cement rotary kilns used in the cement production industry, the energy is saved, the environment is protected and the economic and social benefits are remarkable.

Description

technical field [0001] The invention relates to a refractory material, in particular to a silicon molybdenum brick. Background technique [0002] Refractories are necessary materials for high-temperature kilns, such as large and medium-sized cement rotary kilns used in the production of cement industry. Especially with the rapid development of economy and construction industry, the cement industry is a national pillar industry, and large and medium-sized cement rotary kilns are increasing day by day. , equipment technology is constantly updated, and the upgrading of equipment lining materials - refractory materials has also become the focus of attention of large and medium-sized cement enterprises. Refractory products are necessary materials for the core equipment of cement enterprises. The quality and performance of the products directly affect the service life and operation cycle of the equipment, and are closely related to the benefits of the enterprise. Therefore, it is...

AI Technical Summary

Problems solved by technology

The high thermal conductivity of magnesia-aluminum spinel bricks causes the temperature of the cylinder to be too high, which not only consumes a lot of energy, but also is prone to red kiln phenomenon, causing deformation of the cylinder and affecting the operation

At the same time, the thermal shock stability of magnesia-alumina spinel bricks is very poor. During the operation of the equipment, due to the movement of the material with the cylinder, the temperature difference in the kiln changes greatly, which often causes the bursting and peeling of magnesia-alumina spinel bricks, thus Significantly shortened lining life

In addition, the strength of magnesia-alumina spinel bricks is relatively low, and the wear resistance and ability to resist the shear force of the high-temperature operation of the rotary kiln are weak, which is also one of the factors that prolong the operation period of the equipment.