Description of Magnesia Chrome refractory Brick
Magnesia Chrome refractory Brick are refractory products containing
magnesium oxide (MgO) and chromium oxide (Cr2O3) as the main
components, and periclase and spinel are the main mineral
components. This type of brick has high refractoriness, high
temperature strength, strong resistance to alkaline slag, excellent
thermal stability, and certain adaptability to acidic slag.
Instructions for use of Magnesia Chrome refractory Brick
Magnesia Chrome refractory Brick are mainly used in metallurgical
industries, such as the construction of open hearth furnace roofs,
electric furnace tops, furnace refining furnaces, and various
non-ferrous metal smelting furnaces. The high temperature part of
the ultra high power electric furnace wall is made of fused cast
Magnesia Chrome refractory Brick. The high erosive area of the refining furnace outside the furnace is made of Magnesia Chrome
refractory Brick made of synthetic material.
Features of Magnesia Chrome refractory Brick
The refractoriness is greater than 2000 ℃, the softening
temperature under load is generally above 1550 ℃, the high
temperature volume stability is good, and the rapid cooling and
heating resistance is good.
Application field of Magnesia Chrome refractory Brick
Mainly used for cement rotary kiln, glass kiln regenerator,
steelmaking furnace lining, refining ladle permanent layer,
non-ferrous metallurgical furnace, lime kiln, mixing furnace and
refractory high temperature furnace lining, etc.; also used for
open hearth furnace top, electric furnace Furnace top, refining
furnace outside the furnace.
Classification of Magnesia Chrome refractory Brick
(1) Ordinary Magnesia Chrome refractory Brick
(ie silicate combined Magnesia Chrome refractory Brick), this kind
of brick is made of chrome ore and magnesia with more impurities
(SiO2 and CaO). The firing temperature is not high, around 1550°C.
(2) Directly bonded Magnesia Chrome refractory Brick
are made of chromium concentrate with low impurity content and
relatively pure magnesia. The firing temperature is above 1700°C.
The structural feature of this kind of refractory brick is that the
refractory crystal grains are mostly in direct contact.
(3) Recombined Magnesia Chrome refractory Brick
are combined with Magnesia Chrome refractory Brick. Magnesia Chrome
refractory Brick made from artificial synthetic raw materials
co-sintered magnesia chromium materials or fused magnesia chromium
materials (or partly fused magnesia) are called recombined Magnesia
Chrome refractory Brick.
(4) Semi-recombined Magnesia Chrome refractory Brick
which are made of artificial synthetic raw materials as granules,
and chromium concentrate and magnesia as fine powder, should be
called semi-recombined magnesia-chrome bricks.
(5) Casting Magnesia Chrome refractory Brick
are made of magnesia and chrome ore with a certain amount of
additives, mixed, compacted and bisque-fired, broken into pieces,
melted in the electric arc furnace, injected into the mold, and
annealed to produce master bricks
