How to choose AOD furnace refractory material?

Commonly used refractory materials for AOD furnaces are: ordinary magnesia-chrome bricks, high-alumina plastics, magnesia castables, directly combined magnesia-chrome bricks, recombined magnesia-chrome bricks, semi-recombined magnesia-chrome bricks, high-purity directly combined magnesia-chrome bricks and Combined with magnesia chrome brick, etc.