Patent ID: 6152983
Filing Date: 2000-11-28
Classification: C21B,C22B,Y02P,Y10S

Abstract:
A method of producing reduced iron pellets, comprising the following steps:1) preparing green pellets from a feed material mixture comprising one or more dusts containing iron oxide and zinc oxide, a binder in an amount sufficient to bond the dusts, and water, wherein said green pellets incorporate carbonaceous material from said one or more dusts and/or added separately, and wherein said green pellets contain an amount of carbon in a concentration of from 7 to 60 mass% based on the total amount of iron and zinc;2) drying the thus prepared green pellets to prepare dry pellets;3) feeding the dry pellets to a furnace;4) heating the dry pellets at a temperature elevation rate of from 3 to 13.degree. C./sec within a temperature range from 150 to 900.degree. C. of the pellets; and5) further heating said pellets to temperatures sufficient to reduce said zinc oxide to zinc and evaporate said zinc, and to reduce said iron oxide.