METHOD OF PRODUCING GLASS USING ELECTRIC MELTING Russian patent published in 2018 - IPC C03C13/06 C03B5/27 

FIELD: chemistry.

SUBSTANCE: invention relates to the field of glass melting, intended for conversion into mineral wool by fibre formation. Method of producing glass includes a step of electric welding using electrodes immersed in a glass melt from vitrifiable mixture of charge material. Charge material includes at least one manganese supplier, in which manganese is in an oxidation state higher than +2, selected from MnO₂, Mn₃O₄, Mn₂O₃, Mn₂O₇, permanganates and minerals selected from pyrolusite, hausmannite, bixbyite and birnessite. Total amount of manganese supplier, which is part of the vitrifiable mixture of charge material, is such that one ton of said dry mixture contains between 1 and 20 kg of manganese in an oxidation state higher than +2, calculated as MnO₂. Chemical composition of the glass includes the following components in the range given below, expressed in wt. %: SiO₂ 35–55 %; Al₂O₃ 14–27 %; CaO 3–18 %; MgO 0–15 %; Na₂O+K₂O 1–17 %; Fe₂O₃ 3–15 %; B₂O₃ 0–8 %; P₂O₅ 0–1 %; TiO₂ 0–2 %. Total content of CaO and MgO ranges from 14 to 18 %.

EFFECT: invention enables to significantly reduce the temperature of the glass mixture when in contact with refractories and electrodes and, consequently, the wear of the latter while maintaining the same output.

8 cl, 3 tbl