The use of vegetable materials in the processes of processing iron-metallurgical waste

Abstract

Experimental studies carried out on an experimental sinter plant indicate the involvement of experimental concentrates for the obtained conditioned sinter, which is suitable for use in blast furnace smelting. At study temperatures, the reactivity of pyrolyzed carbonaceous wastes of plant origin is comparable to charcoal at a much lower cost of materials. Thus, the cost of granular carbonaceous material of plant origin in the Dnipropetrovsk region is about 500 g / t, the cost of lignin hydrolysis from dumps - from 50 g / t. The use of briquetted charges, consisting of the investigated concentrate and solid reducing agent, accelerates the process of interaction of carbon with iron oxides by an average of 5 -10% with recovery rates up to 90%. At higher recovery rates, the recovery rates are equalized. An increase in the process temperature leads to the same effect. The obtained experimental material with a high degree of reduction can be effectively used in the form of briquetted metallized intermediate as a substitute for scrap (up to 30%) in steelmaking units for cooling the smelting. Key words: pyrolysis, vegetable waste, iron - containing waste, recovery, agglomeration, scrap substitute.