The factorial design approach can be used to precisely estimate the effect of different parameters on the reduction process of iron oxide. In the current study, a 24 factorial design was used to significantly calculate the magnitude impact of manganese oxide and silica on the reduction yield of iron oxide which was reduced with H2 at 900-1100°C. A regression model was built on the experimental reduction results of pure iron oxide and iron oxide doped with either MnO2 (mass content of 6%) and/or SiO2 (mass content of 7.5%) at 900°C and 1100°C. The developed mathematical model was used to predict the reduction yield as a function of four parameters including MnO2 (mass content of 0-6%), SiO2 (mass content of 0-7.5%), reduction time (1.0-10 min) and temperature (900-1100°C). In addition, the effect of the interaction combination of different parameters (MnO2, SiO2, time, and temperature) on the reduction yield was estimated. The results showed that the reduction time has the highest positive effect on the reduction yield of iron oxide sinter followed by the applied temperature and then SiO2 addition. On the other hand, MnO2 exhibited the highest negative effect on the reduction yield of iron oxide followed by the combination effect of SiO2 with time and temperature. The interaction combination effect of MnO2 with temperature or MnO2-SiO2 with time and temperature on the reduction yield was very small. The regression model was applied to theoretically estimate the reduction yield of pure and doped iron oxide at 900-1100°C. The obtained values of the derived model are in a good agreement with the experimental results under different conditions.

Please login / register to post comments

news in steel

Tibnor’s acquisition of Sanistål’s steel distribution business completed

SSAB’s subsidiary Tibnor has now comleted the acquisition of the steel distribution business of the Danish company Sanistål A/S, Denmark’s second largest steel distributor.

NUCOR TAPS DANIELI MI.DA. TECHNOLOGY FOR ITS STRATEGIC EXPANSION IN REGIONAL REBAR MARKETS

When exploring the opportunity to expand its presence in new regional markets in the Midwest and Southeast of the USA, Nucor immediately understood the benefits of the MI.DA. technology and ultimately chose Danieli to supply the complete technological equipment package for two MI.DA. plants, in Sedalia (Missouri) and Frostproof (Florida).

Chem-Trend to Showcase New Die Lubricant Technologies at GIFA

Chem-Trend, a global leader in the development, manufacturing, and marketing of high-performance release agents, purging compounds, and other ancillary molding products, will showcase another new line of die lubricant polymer technologies, specifically developed to help die casters improve operational efficiency, at the GIFA in Düsseldorf from June 25-29, 2019.

Impressive performance by the “Bright World of Metals”

Driving force behind the industry

Excellent registration figures for the “Bright World of Metals”: about 2,100 exhibitors