K e y w o r d s C o n t r o l volume, Iron ore direct reduction, Composite pellet, Axisymmetric heat transfer. 1. I N T R O D U C T I O N Some coal-based i ron ore direct reduc t ion processes are based on format ion of composi te pellets which consist of a mix ture of fines of i ron-bear ing oxide, carbonaceous mater ia l , for example, coal, coke, or char and a smal l a m o u n t of binder . ...

Results of reducibility tests of reduction conducted on iron ore pellets with carbon are presented in this work. Work done is centered on reduction kinetics using carbon as reducing agent with conventional heat supply (heat transfer process) compared with reduction kinetics where heat is supplied by microwaves to the whole volume. Ore used in this work is called "Alzada" which has reducibility ...

The use of biomass as fuel might solve several technological and environmental issues overcome certain challenges sinter production. In particular, revealed by comprehensive analyses, can be used for iron ore sintering. this study, we investigate the some raw pyrolysis-processed pellet types, namely wood, sunflower husks (SFH), straw, experiments, pyrolysis temperature was set to 673, 873, 1073...

Mathematical model for a pilot scale iron ore pellet induration furnace has been developed which considers the process of induration including the reactions of limestone, magnetite and coke. The differential equations of energy, mass and momentum are solved simultaneously. The profiles of temperature, pressure and concentration are obtained. Performing separate experiments on sub processes; dry...

The kinetics of the isothermal reduction iron ore–coke, ore–charcoal, and ore–biomass (straw) composite pellets were studied at 900–1200 °C. Compared with other two pellets, pellet using biomass as a reducing agent showed more rapid rate relatively low temperature. With an increase in temperature, rates three different tended to be equal. reactions all mainly controlled by gasification diffusio...

Humic acid is inexpensive, and has a wide range of sources strong adsorption force with the surface iron ore, size its affected by some factors such as humic concentration, pH solution, metal cations. The modified pellet binder (MHA) adhesion high viscosity was obtained through separation purification solid wastes lignite weathered coal chemical modification treatment successfully applied in pr...