Conclusions
In the German Democratic Republic the furnaces are mainly lined with crystalline or cement quartzites, where the inversion of the quartz results in a resistance increase of 1 to 5%. In the Czechoslovak Socialist Republic crystalline quartzite, so-called Surazite, is used which contains 89–97% of SiO2.
The dry method of lining production is preferred. Particular attention is paid to high-quality ramming and to the conditions of the (first) firing smelt.
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Literature cited
O. Gerstmann, Giessereitechnik,10, No. 6, 171–177 (1964).
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Translated from Ogneupory, No. 10, pp. 58–61, October, 1969.
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Kaibicheva, M.N. Refractories and technology of preparing crucibles of induction furnaces in the German Democractic Republic and the Czechoslovak Socialist Republic. Refractories 10, 655–658 (1969). https://doi.org/10.1007/BF01295361
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DOI: https://doi.org/10.1007/BF01295361