PRODUCT DESCRIPTION

Introduction

Direct bonded magnesia-chrome brick is made of high-purity magnesia and chromite ore. It is sintered at ultra-high temperature to form direct combination between periclase and chromite grains without low-melting binding phase. Featuring excellent slag resistance and high-temperature structural stability, it is widely used in harsh high-temperature metallurgical furnaces. 

Direct bonded magnesia-chrome bricks are made of high-quality magnesite ore and chromite ore, which are first fired into light-burnt magnesia. According to a certain gradation, it is formed into balls under high pressure and fired at a high temperature of 1900°C to produce dead-burned magnesia. Add a certain proportion of chromite ore and press molding. It is calcined in a tunnel kiln at 1750~1850℃. Those fired at 1750~1800°C are high-temperature directly bonded magnesia-chrome bricks. Those fired at 1800~1850°C are directly bonded magnesia-chrome bricks.

Features

Excellent slag corrosion resistance: Directly bonded crystal structure effectively resists penetration and erosion of alkaline slag and molten steel.

Superior high-temperature performance: High refractoriness under load, low high-temperature creep, no softening or deformation under long-term high load.

Good thermal shock stability: Reasonable grain structure relieves thermal stress, reduces cracking and peeling during temperature alternation.

Strong structural strength: Dense and uniform texture provides outstanding abrasion and scouring resistance.

Application

Mainly used for high-temperature metallurgical furnaces with severe alkaline slag erosion and high-load working conditions.

AOD furnace, VOD furnace, refining furnace and high-temperature furnace lining.

Copper, nickel and lead smelting furnace key lining parts.

   TECHNIQUE DATA