METHOD FOR PRODUCING FORSTERITE MATERIAL Russian patent published in 2023 - IPC C04B35/657 C04B35/20 

FIELD: ceramic industry.

SUBSTANCE: invention relates to the production of forsterite ceramic and refractory materials used in converter linings, out-of-furnace steel processing units, steel-pouring ladles and non-ferrous metallurgy furnaces, as well as for ceramic dielectrics. To obtain forsterite ceramics, raw materials based on the magnesia-silicate group with a MgO/SiO₂ ratio corresponding to the theoretical composition of forsterite are first subjected to isothermal exposure, then mixed to obtain a composite charge. The charge is crushed to a fraction≤ 100 microns and carry out wet granulation to a fraction of 2-3 mm. The resulting agglomerated powder is poured into a plasma-chemical reactor, preheated to a temperature of at least 2050°C, where it melts under conditions of intense heat exchange at a temperature of 3500-4000°C. When the melting process is carried out at a given temperature, evaporation of impurity elements occurs that do not enter into the main reaction of the formation of forsterite material. The melt is drained at a temperature of at least 2150°C, then it crystallizes at a rate of 7°C/s with the formation of dense packing of rhombic-dodecahedral crystals with a size of 180-240 microns.

EFFECT: production of forsterite material of a homogeneous dense structure from common natural materials.

1 cl, 1 ex, 2 tbl, 1 dwg