Procedure and installation for processing iron-containing metallurgical waste

The review and the analyses of publications in the domain of recycling crushed iron containing metallurgical waste, including dust, slam, etc., has made it possible to determine the generated tendency of their processing. As this waste contains a significant amount of harmful admixtures, their recycling in the basic manufacture process results in accumulation of harmful substances that negatively affect the operation of metallurgical units. Therefore their processing in insulated installations is strongly recommended nowadays. The first installations had high capital and current expenditures. Creation of rotary-hearth kilns has allowed to lower essentially current expenditures, however capital expenditures remaining high. Besides the rise in prices for heating gas under the conditions of Ukraine made the installations unprofitable. That is why there arises a problem of cardinal reduction of such installations employment as well as current expenditures for their maintenance. The executed investigations have made it possible to develop both the procedure and the installation realizing this procedure. So, the principal differences of the given procedure from the known ones are simultaneous crushing of the charge to micron level, the use of bichofit МgCl2·6Н2О as the connector and the flux, preliminary consolidation of the charge material in the runners and application of a special multizonal induction furnace for metallic coating. The set of the measures realized on the given procedure, raises the degree of metallic coating of iron from 90%, realized according to the known procedure, up to 99,6% and reduces the restoration cycle by 4-8 times, i. e. from 1-2 h. to 0,25 h. It also allows to improve ecological environment and to reduce the total metal loss by 3-5%. The installation has been developed as a mobile variant for which the equipment is arranged as separate units fixed on welded frames. The installation has been developed with regard to the equipment fabricated in Ukraine, and does not depend on the deliveries of the component parts and the connectives from abroad; it considerably reducing its cost