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Monolithic magnesia refractories
include gunning material, ramming material, castable material,
coating material and mortar which are mainly used for the making and
mending of bottoms and linings of high temperature furnace. Since
the manufacturing processes of most of these materials are
of similarity here we basically introduce that of gunning material.
1. Gunning
Material
Taking sintered magnesite and/or
sintered dolomite and some materials of magnesium and calcium
substance as aggregate, it is, made under specific blending ratio
and various additives and inorganic binders, featured by quick
solvency, instant hardening, low rebound elasticity and easy gunning
operation. It is mainly used for the mending of magnesia carbon
based or magnesia based linings of various basic steel making
furnaces.
2. Dry Ramming Material for the Bottom of Electric Arc Furnace
It is made of some high purity
materials finely through processes of batching, shaping, sintering
and synthesizing then crushing, screening and final blending. It is
featured by quick sintering, high density, high strength, good
thermal resistance and volume stability and widely used in making
the bottoms of various electric arc furnaces. Its characteristics
have come up to Austrian standards of same kind and its serving
lives have come up to and even beyond the standards of same kinds
imported from some Western countries.
3. Magnesia
Tundish Coating Material
This product is made of two kinds
of high quality magnesia adding some auxiliary materials such as
composite binders, composite antiknock reagent, intensifying agent,
plasticity agent and water reducer. It is featured by many excellent
performances like easy operation, non-cracking under firing, good
resistance against molten steel and slag corrosion and easy
dis-assembly.
4. Magnesia
Mortar
This product is made of finely
ground magnesia and featured by good evenness and stability of
chemical composition and sintering by air-hardening. It is favorable
refractory mortar for furnace mending and magnesia based refractory
bricks laying.
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