Production and performance of magnesium chromium bricks

2024-06-27 17:41:59

Magnesium chromium bricks are refractory products mainly composed of magnesium oxide (MgO) and chromium trioxide (Cr2O3), with periclase and spinel as the main mineral components. This type of brick has high fire resistance, high temperature strength, strong resistance to alkaline slag erosion, excellent thermal stability, and adaptability to acidic slag.

The production principle of magnesium chromium bricks mainly involves the selection of raw materials, proportion, production process, and product performance. The main raw materials for magnesium chromium bricks are sintered magnesia and chromite. Among them, the purity of magnesia raw materials should be as high as possible to ensure the performance of the product. The chemical composition of chromite requires a Cr2O3 content of 30-45%, while the CaO content should be controlled below 1.0-1.5%.

Raw material processing: The raw materials are processed through crushing, screening, mixing, etc. to meet production requirements.

Forming: The processed raw materials are high-pressure formed to form the desired shape and size.

Firing: The formed bricks are fired at high temperatures to endow magnesium chromium bricks with excellent fire resistance.

Magnesium chromium bricks have the following excellent properties:

High fire resistance: Due to the main components being high-purity magnesium oxide and chromium trioxide, magnesium chromium bricks have excellent fire resistance performance.

High temperature strength: In high-temperature environments, magnesium chromium bricks can maintain high strength and are not easily softened or deformed.

Strong resistance to alkaline slag erosion: Magnesium chromium bricks have strong resistance to alkaline slag erosion and are suitable for various alkaline environments.

Excellent thermal stability: Magnesium chromium bricks have good thermal stability and can withstand rapid temperature changes without being easily cracked or damaged.

Magnesium chromium bricks have a wide range of applications, mainly used for refractory lining and furnace structure in various high-temperature environments.

Building the top of an open hearth furnace and an electric furnace: Magnesium chromium bricks have become an ideal material for constructing these high-temperature furnace tops due to their high fire resistance and good thermal stability.

Off furnace refining furnace: In the off furnace refining furnace, magnesium chromium bricks are used in high erosion areas and can withstand the high temperature and corrosive environment inside the furnace.

Nonferrous metal smelting furnace: For smelting furnaces of non-ferrous metals such as copper, zinc, and nickel, magnesium chromium bricks also play an important role.

Cement rotary kiln firing zone: Large and medium-sized cement plants promote and use chromium magnesium bricks in the firing zone, which have the advantage of high temperature resistance and are superior to other types of refractory materials used in the firing zone.

The thermal storage chamber and other parts of glass kilns: Magnesium chromium bricks are widely used in the thermal storage chamber and other parts of glass kilns due to their excellent fire resistance performance.

Magnesium chromium bricks have been widely used in multiple industries due to their excellent fire resistance, high-temperature stability, and slag resistance.

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