Modern Copper Smelting / being lectures delivered at Birmingham University, greatly extended and adapted and with and introduction on the history, uses and properties of copper.

by Donald M. Levy

2Cu : Cu2S	::	2 × 63·5	:	2 × 63·5 + 32
	::	127	:	159
	::	4	:	5 approximately.

When sulphur combines with iron.

S : FeS	::	32	:	56 + 32
	::	32	:	88
	::	4	:	11.

[9] Some flue-dust is also melted down.

[10] The East Butte Copper Mining Company has recently reported the successful sintering of its flue-dust by Dwight-Lloyd machines. (See Mining Journal, Jan. 6, 1912, p. 21).

[11] Later work on this subject has been published by W. Wanjukoff:—“Investigations on the Conditions governing the Entry of Copper into the Slags on Matte-Smelting, on the Chemical Form in which such Copper exists, and on the Lessening of the Copper Losses in Slags.” Metallurgie, 1912, Vol. x., Nos. 1 and 2, pp. 1–27, Jan. 8 and 22, 1912.

[12] This point will be dealt with in due course.

[13] The iron sulphide of a copper matte is probably the eutectic of the iron-sulphide : iron series containing about 85 per cent. of sulphide.

[14] Ducktown Sulphur, Copper, and Iron Company.

[15] These views have recently been controverted in an interesting paper by G. A. Guess. (“Notes on Pyritic Smelting,” Engineering and Mining Journal, 1912, Jan. 13th, p. 113). He defines Pyritic Smelting as the production of a Ferrous Silicate Slag from Iron Sulphide Ore.