Kinetics and Reduction Behavior of Self-reducing Briquettes Containing Blast Furnace Dust

Wu, Shengli; Chang, Feng; Zhang, Jianliang; Lu, Haifei

doi:10.1007/978-3-319-51340-9_58

Cited by 3 publications

(1 citation statement)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The main components of BF dust are iron oxides, carbon, and a small amount of silicon, aluminum, calcium, magnesium oxides, and so on. In view of the valuable amounts of iron (total Fe of ∼40%) and carbon contents, BF dust can be regarded as an excellent secondary source and possibly reused as raw material in sintering plants. However, with the characteristics of fine particle size and zinc content, the utilization of BF dust in sintering process has long been difficult, because of the low gas permeability and the low removal efficiency for Zn from BF dust in the sintering process .…”

Section: Introductionmentioning

confidence: 99%

Reduction Behavior of Blast Furnace Dust Particles during In-Flight Processes

Chen

Xin

et al. 2017

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Blast furnace (BF) dust can be recycled as one of excellent secondary sources, in view of the valuable amounts of iron and carbon contents, and the in-flight reduction technology is considered to allow processing the fine metallurgical dusts efficiently. In this work, the reduction behavior of BF dust particles during in-flight process was studied using a high-temperature drop-tube furnace in laboratory scale. The effects of temperature and gas composition on the reduction degree were remarkable. Based on the morphological observation and phase diagram analysis, the product layer of the reduced BF dust particle was confirmed in molten state at 1673–1723 K. Kinetic analysis showed that the gas-molten particle reduction during in-flight process was a mixed control of the chemical reaction and diffusion of Fe3+ and O2– ions through the molten product layer, and the corresponding chemical reaction constant (k r) and the diffusion coefficient (D) was also obtained.

show abstract

Section: Introductionmentioning

confidence: 99%