Industry Knowledge of Chrome-Corundum Refractory Brick

Chrome-corundum refractory brick is a high-performance refractory material made from chrome oxide and corundum as its main raw materials. This type of refractory brick is widely used in high-temperature industrial furnaces such as cement kilns, glass melting furnaces, and steelmaking furnaces. Its excellent high temperature strength, abrasion resistance, and thermal shock resistance properties make it a preferred choice for manufacturers.

Chrome-corundum refractory bricks can be divided into different grades based on their chemical composition and physical properties. Typically, the grades are designated as ZAC, ZASC, and ZCRC. The ZAC grade brick has a content of 90-95% aluminum oxide, while ZASC has a composition of 70% alumina, 10% chrome oxide, and 20% corundum. Finally, the ZCRC grade has a composition of 50% alumina, 25% chrome oxide, and 25% corundum.

Apart from their different grades, chrome-corundum refractory bricks also have varying technical parameters, including bulk density, apparent porosity, cold crushing strength, and thermal conductivity. The selection of these parameters is critical to the overall performance of the refractory brick. For instance, high-density bricks have better wear resistance, while low-density bricks have excellent thermal insulation properties.

The production process of chrome-corundum refractory bricks involves several steps, including raw material selection, mixing, molding, drying, firing, and post-treatment. The mixing process involves blending the raw materials in the right proportions to form a homogenous mixture. Next, the mixture is pressed into the desired shape using hydraulic presses and then dried at temperatures of 120-150 °C. Finally, the dried bricks are fired at temperatures above 1700 °C to ensure that they have excellent thermal properties.

In conclusion, chrome-corundum refractory bricks are essential materials for high-temperature industrial furnaces. Its excellent properties make it an ideal option for industrial applications, and its different grades and technical parameters provide manufacturers with a range of options to choose from. The production process of chrome-corundum refractory bricks is a complex and highly controlled process that ensures the resulting bricks have the desired properties and performance.