Method of minimizing slagging in the burning of black liquid

US4514256A · kind A · utility

Inventors

• Alfred E. Kober · Bound Brook, US
• Stanley E. Gilewicz · Dover, US

Key dates

• Filing date: Apr 18, 1983
• Grant date: Apr 30, 1985
• Expiry date: Apr 18, 2003

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C10L10/06
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The formation of slag is minimized and the removability of slag is greatly increased, in connection with the furnace burning of black liquor, by applying to the surfaces where slag tends to form a substance which, under black liquor furnace conditions, reacts with the sodium sulfide content of the black liquor ash to oxidize said sodium sulfide and to be itself reduced, such substances preferably comprising sodium persulfate, manganese dioxide, cupric oxide and ferric oxide and mixtures thereof.