Fuel briquettes from sludge (cake) of concentrating mill

Abstract

Abstract Briquettes made of cake (sludge) with addition of woody sawdust in a volume from 8 to 14% are studied here. Introduction of a moisture-removing agent in a ratio that is sufficient for initial stable shaping and hardening without thermal drying satisfies the requirement for mechanical strength at transportation. Briquettes have a mechanical strength of more than 97%, which does not change during freezing and thawing, underburning after combustion is no higher than 4%, and ash content is not higher than 36%. Stability of briquettes burning can be defined as steady and long-lasting. Such fuel briquettes for the purpose of their use in grate and other furnaces can be produced according to the scheme of pressing in extruders or roller press.