Design and Discrete Element Analysis of Accumulated Material-type Distributing Chute on Blast Furnace

• Published in: ISIJ International Vol. 59; no. 6; pp. 998 - 1006
• Main Authors: Li, Lingling, Liu, Zhenghai, Xu, Jiaye, Shi, Jialian
• Format: Journal Article
• Language: English
• Published: The Iron and Steel Institute of Japan 15.06.2019
• Subjects: abrasion resistance; accumulated material; anti-impact; discrete element; distributing chute
• ISSN: 0915-1559; 1347-5460
• DOI: 10.2355/isijinternational.ISIJINT-2018-678

A new accumulated material-type distributing chute on blast furnace (BF) is designed to prolong the service life of distributing chute on BF according to powder mechanics theory, and a Comparative simulations study between the accumulated material-type distributing chute and smooth-plate straight chute is conducted using discrete element method. Additionally, the influence of shape of transverse ribs in accumulated area and particle size on the impact of chute are discussed. Results show that this type of distributing chute on BF has formed a stable material accumulation under the impact zone of material flow and its material cushion forms a certain thickness, which greatly reduces the impact and abrasion of material flow. The impact force of the material flow on the chute is reduced to 10.1%–17.2%, and the sliding velocity of particles near the bottom plate is reduced to 29.1%–33.4% compared with the smooth-plate straight chute. Therefore, the new accumulated material-type distributing chute has good anti-impact ability and abrasion resistance. Shape of transverse ribs in accumulated area and particle size have a relatively small effect on the impact of chute after discussing.