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Published in:
2016 | OriginalPaper | Chapter
Dry Sintering of Nepheline — A New More Energy Efficient Technology
Authors : Sine Bøgh Skaarup, Yuriy A. Gordeev, Victor V. Volkov, Victor M. Sizyakov
Published in: Light Metals 2014
Publisher: Springer International Publishing
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A new more energy efficient technology for dry sintering of nepheline and limestone has been developed in collaboration between Pikalevo Soda, FLSmidth and the Russian National Mineral Resources University. The new technology is a result of laboratory research activities and semi-industrial tests conducted by FLSmidth in Denmark and USA.The technology tested semi-industrially consists of a 3-stage preheater with calciner and rotary kiln. This type of equipment has already been in operation in the cement industry for more than 40 years.The tests proved a success due to the ability to control feed chemistry and particle size distribution as well as temperature profile and retention time in kiln system. Control of the above parameters is the basis for achieving high quality sintering and required alumina extraction.This paper presents the results of the semi-industrial tests and compares it to the existing wet technology applied at the Pikalevo site.