Fusion temperatures of PFA from New Zealand sub-bituminous coals

✍ Scribed by David M. Bibby; Frank J. MacKnight; Graeme J. Gainsford

• Publisher: Elsevier Science
• Year: 1978
• Tongue: English
• Weight: 421 KB
• Volume: 57
• Category: Article
• ISSN: 0016-2361
• DOI: 10.1016/0016-2361(78)90031-5

✦ Synopsis

The ash fusion temperatures of 20 analysed samples of pulverized fuel ash obtained from the Meremere coal-burning power station have been determined. It is shown that the fusion temperatures can be related to the acid-soluble calcium and iron oxide contents, and that it is possible to predict the softening and hemisphere temperatures of ash cubes with a precision of ca. 10 to 20°C in either oxidizing or reducing atmospheres. Removal of the magnetic iron fraction from the PFA reduced both the softening and hemisphere temperatures by ca. 10 to 15°C in an oxidizing atmosphere, and in a reducing atmosphere it increased the softening temperature by ca. IO'C and the hemisphere temperature by ca. 30°C.