Deposit Formation in a Grate鈥揔iln Plant for Iron-Ore Pellet Production. Part 2: Characterization of Deposits
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- 作者：Jesper Stjernberg ; Carrie Y. C. Jonsson ; Henrik Wiinikka ; Bo Lindblom ; Dan Bostr枚m ; Marcus 脰hman
- 刊名：Energy & Fuels
- 出版年：2013
- 出版时间：October 17, 2013
- 年：2013
- 卷：27
- 期：10
- 页码：6171-6184
- 全文大小：754K
- 年卷期：v.27,no.10(October 17, 2013)
- ISSN：1520-5029
文摘
Buildup of deposit material in chunks on refractory linings caused by combustion of various fuels is a well-known problem. This study characterizes the short-term deposits on refractory material in a grate鈥搆iln process, carried out through in situ measurements using a water-cooled probe with a part of a refractory brick mounted in its end. Sampling was carried out during combustion of both oil and coal. A significant difference in deposition rates was observed; deposition during oil firing was negligible compared to coal firing. The deposits are mainly hematite particles embedded in bonding phase, mainly comprising Si, Al, Fe, Ca, and O. Moreover, it was found that the prevailing flue-gas direction determines the formation of the deposits on the probe and that inertial impaction controls the deposition rate. However, this rate can also be affected by the amount of air-borne particles present in the kiln.