2026-10-14T13:12:13Z https://api.figshare.com/v2/oai

oai:figshare.com:article/34040616 2026-10-01T07:10:29Z category_915 category_21 category_272 category_873 category_39 category_734 category_61 category_106 category_128 portal_63 item_type_6 month_year_10_2026

The Effect of Coke Powder on the Iron Ore Fines Reduction by Carbon Monoxide Yuan Zhao (336512) Tao Wang (12008) Tianming Xu (13981059) Binxuan Zhou (25153770) Yong Dong (683776) Chunyuan Ma (4164955) Physical Sciences not elsewhere classified Biotechnology Environmental Sciences not elsewhere classified Chemical Sciences not elsewhere classified Ecology Biological Sciences not elsewhere classified Developmental Biology Science Policy Hematology iron ore fines sticking index reached 2 mainly promoted overall sticking inhibition fine coke powder feo → fe coke powder causes coke powder acts inlet co concentration 3 </ sub outlet co concentration 2 </ sub sticking inhibition coke powder outlet co co concentration concentration decreases tube reactor synergistically reduced results show physical barrier growth model contact probability blending ratio activation energies 80 kj 61 kj 09 kj Iron ore fines and coke powder are synergistically reduced in a drop-tube reactor. The effects of temperature, CO concentration, and the blending ratio (BR) of coke powder are investigated. The results show that increasing temperature promotes reduction within the range of 800–1200 °C, while CO concentration has a lesser effect. The kinetic mechanism can be explained by a nucleation-and-growth model, and the activation energies for iron ore fines, the mixture with fine coke powder at BR = 0.4, and the mixture with the same particle size coke powder at BR = 0.4 are 19.09 kJ/mol, 50.61 kJ/mol, and 47.80 kJ/mol, respectively. Coke powder causes the outlet CO concentration to be equal to or greater than the inlet CO concentration and the outlet CO₂ concentration decreases. Increasing BR from 0.4 to 0.8 and 0.8 to 1.2 mainly promoted the conversion of Fe₃O₄→FeO and FeO→Fe, respectively. The sticking index reached a minimum of 0.86% when BR = 0.4. However, overall sticking inhibition was more effective when BR = 1.2. The mechanism of sticking inhibition is that the coke powder acts as a physical barrier, reducing the collision and contact probability between the iron ore fines, thereby preventing iron whiskers from entangling or bridging. 2026-10-01T00:00:00Z Text Journal contribution 10.1021/acsomega.6c05900.s001 https://figshare.com/articles/journal_contribution/The_Effect_of_Coke_Powder_on_the_Iron_Ore_Fines_Reduction_by_Carbon_Monoxide/34040616 CC BY-NC 4.0