Production Craft & Advantages of Fused Cast Magnesia Chrome Refractory

Normal sintered magnesia chrome refractory brick has some ratio of micro pore and micro crack. Although these pores and cracks can absorb and alleviate some thermal stress in high temperature environment, the disadvantage is that they are very easy to be permeated by smelted slag. Compared with steel industry, nonferrous metal smelting has a lower temperature, but the slag content is higher. Slag are mainly consisted of strong corrosive ferrate or silicate, has low consistency and interfacial stress, as well as strong infiltration and permeation ability. So, when sintered magnesia chrome refractory brick materials are used for nonferrous metal smelting furnace, the permeated metamorphic layer will be thicker, structure strength will decrease and spall. Slag permeation leaded structural spall is the main reason for high refractory material consumption and low service life of nonferrous metallurgy. So that the Advantages of Fused Cast Magnesia Chrome Refractory Materials is obvious.

Advantages of Fused Cast Magnesia Chrome Refractory Bricks

Fused cast magnesia chrome refractory bricks has exclusive advantages against slag permeation corrosion, because it is dense fit produced by melting, casting, integral cooling, slag erosion can only happen on brick lining surface and won’t occur permeation. Although fused cast magnesia chrome refractory brick is hard to produce and the cost is high, it has dominant place can’t be replaced by other refractory materials and are widely used in the key parts of nonferrous metallurgy in technique developed countries.

Oxygen-rich fast smelting and oxygen-rich molten bath smelting are currently international leading nonferrous metal smelting technique. These new techniques’ common characteristics are oxygen-rich blast and intensified smelting. Furnace lining refractory material should endure very strict working condition, researching and developing oxygen rich smelting technique for refractory material, especially magnesia chrome brick is very compulsory.

Fused Cast magnesia Chrome Refractory Brick’s Produce Craft

Fused cast magnesia chrome refractory brick’s produce craft differs far from normal sintered refractory bricks material, it adopts magnesia sand and chromite as main material, added with additives, mixed, smelted in electric furnace, poured and casted in moulds, cooled and annealed by control and becomes mother block. By cutting, grinding, drilling and cool processing, the needed shape is produced.