Full resolution (JPEG) - On this page / på denna sida - Second part - IX. Mining Industry and Metal Production - 2. The Iron and Steel Industry. By the late Prof. J. G. Wiborgh - Ingot iron (Steel)
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740-
ix. mining industry and metal production op sweden.
of the iron, the converter is turned np and the blast is caused to pass through
the liquid iron, when the refining begins, the progress of which is judged of,
partly by the size and appearance of the flame escaping from the mouth of the
converter, partly by the sparks generated by the combustion of the small drops
of iron thrown out with the gases into the air.
Converter at work.
Only after the greatest part of silicon and manganese have been oxidized
and slag has been formed, the oxidizing of the carbon commences, when a great
quantity of carbonic oxide is formed, which colors the flame violet, this being a
sign that the boiling has be^un.
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