Emmons, N. H., “Copper Blast-Furnace Tops.” Bulletin Amer. Inst. Min. Eng., Feb., 1911, p. 119.

“Heating Blast.” Engineering and Mining Journal, June 16 and Sept. 15 and 29, 1906.

“Pyrite Smelting,” T. A. Rickard.

Also the Authors already referred to, Austin (p. 80), Gowland (p. 17), Peters (p. 80).


LECTURE VII.
Modern Blast-Furnace Practice (Continued).

Charge Calculations—Charging—Working—Disposal of Products—Pyritic Smelting—Sulphuric Acid Manufacture from Smelter Gases.

Charge Calculations.—Modern practice aims at the production of a matte of converter grade, containing usually from 40 to 50 per cent. of copper, and preferably in a single smelting operation; except in true pyritic work.[12]

Full analysis of the whole supply of material available at the smelter is essential, as well as a report on the quantities of each separate constituent.