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

Fig. 11.—Brunton Sampler.

The above description is quite general, several details for certain classes of ore having been omitted, but it gives a fair idea of the general principles underlying such work.

The final sample, say 3,200 lbs. per 1,000 tons of ore, is mixed on an iron plate on the floor, quartered several times by a Brunton shovel, and the chosen sample then ground in an Englehardt mill (small Gates’ crusher with two discharges). The material is passed through a 1-foot riddle of 100 mesh wire cloth, the very small quantity of coarser stuff remaining, is bucked down and added, and the whole is then thoroughly mixed in a canister of 1 foot side gripped at opposite corners, and rotated mechanically.

References.

Constitution of Copper Mattes.

Keller. Mineral Industry, vol. ix., 1900, p. 240. “Elimination of Impurities from Copper Mattes.”

Röntgen. Metallurgie, vol. iii., 1906, p. 479.

Hofman, Caypless, and Harrington. Trans. Amer. Inst. Min. Eng., vol. xxxviii., 1908, pp. 142–153.

Gibb and Philp. Trans. Amer. Inst. Min. Eng., vol. xxxvi., 1906, p. 665.