Magnesium and Magnesia Bricks - Shape and Size
In many industries, magnesium and magnesia bricks are an essential component of kiln operations, providing the necessary protection and insulation against heat, shock, and other abrasive forces. At the same time, these bricks also need to provide an effective seal to retain heat and improve the efficiency of the kiln. The shape and size of these bricks therefore need to be carefully selected to ensure a good quality product.
The most common type of magnesium and magnesia bricks used in kilns are the cast or extruded open-ended bricks, which typically have a rectangular shape and are usually made from a high alumina-magnesia aggregate or a fired magnesia-chrome-spinel mix. Depending on user requirements, the shape and size of the brick can be modified to suit different kiln operations. These modifications include tapering of the faces, increasing or decreasing the height, and changing the width or length to suit the kiln size.
For example, a cast-bell kiln typically utilizes thicker-faced bricks, while an open top chamber kiln would require thinner-faced bricks. On the other hand, barrel-type chamber kilns typically use thicker-faced bricks arranged in a circular pattern, while a continuous-type kiln may require longer and thinner bricks. The size of the bricks also depends on the kiln size and the specific operations it is being used for, as well as factors such as the type and amount of material being fired in the kiln.
Extruded open-ended bricks are most often used in markets requiring bricks with dimensions that cannot be supplied through the usual casting methods. These bricks are usually made from a high alumina-magnesia or a fired magnesia-chrome-spinel mix, and come in a variety of shapes and sizes depending on customer requirements. The common shapes of extruded open-ended bricks include the iso-rectangular, trapezoidal, and spheroidal bricks.
The performance of magnesium and magnesia bricks is subject to several factors, such as the shape of the brick, size, composition, density, and refractoriness. Different brick types, sizes, shapes, and compositions must be selected for specific applications to ensure the right combination of performance and quality. The bricks used in large chamber kilns, for example, must be of larger size and higher density than those used in smaller chamber kilns.
When selecting the right shape and size of magnesium and magnesia bricks for kilns, factors such as opening position, temperature, operations and refractoriness should be considered. Additionally, it is important to understand the local market needs and the need for different brick types, sizes, shapes, and compositions in order to decide the brick to be purchased. The performance of bricks is also affected by the amount and type of material fired in the kiln, and the correct selection of bricks is necessary to ensure the optimal performance of the kiln.
To summarize, choosing the correct shape and size of magnesium and magnesia bricks for kilns is essential for optimized performance and quality. The shape and size of the brick must be carefully selected in order to meet market needs and to ensure the best combination of performance and quality. Additionally, the performance of the bricks is also linked to the amount and type of material fired in the kiln, as well as local market conditions. Therefore, proper consideration of all these factors must be taken into account when selecting the right bricks for specific applications.
