2016-Sustainable Industrial Processing Summit
SIPS 2016 Volume 4: Santilli Intl. Symp. / Mathematics Applications
| Editors: | Kongoli F, Gaines G, Georgiev S, Bhalekar A |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2016 |
| Pages: | 320 pages |
| ISBN: | 978-1-987820-42-3 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Numerical Simulation on the Effects of Inlet Velocity on Gas-Powder Flow in a Slot-Plug Mixing Chamber
Jianbo Xie1;1, Wuhan, China;
Type of Paper: Regular
Id Paper: 226
Topic: 38
Abstract:
The slot plug is an important functional element for bottom-injection technology of powder and greatly influences the operation of this technology. In order to improve the bottom injection efficiency, effects of the inlet velocity on gas-powder flow distribution and pressures at outlet interface were investigated based on numerical simulations. The two-phase flow of N2 and CaC2 powder in a mixing chamber was described numerically and experimentally. The main goal of this paper was to explore the best inlet velocity for obtaining perfect parameters of the bottom injection powder. The following conclusions were made. When the velocity at inlet is 20 m/s, pressure drop at outlet is 25 Pa and the mixing uniformity of gas and powder can easily enter the slits. When the inlet velocity is 35 m/s, the pressure drop is about 1100 Pa. While the pressure drop is 1600 Pa with the inlet velocity at 50 m/s and the velocity distribution at outlet is non-uniform, which is not conducive to powder mixing inside the mixing-chamber. The gas-powder flow cannot enter the slits efficiently. An industrial trial of desulphurization pretreatment was performed using the powder injection technology with the slot plug at the bottom of a 20 t hot metal ladle. The results reveal that the desulphurization efficiency is 15% greater than that obtained with the same type of top-powder process. Therefore, the inlet velocity at 20 m/s would be better for the mixing chamber.
Keywords:
bottom-injection powder; mixing chamber; inlet velocity; uniformity; numerical simulation; industrial trialReferences:
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