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But fine grinding merely turned the ore into that powdery slime which, since the
dawn of gold milling, had been the bugbear of metallurgists. The slime absorbed
tons of water, and water was precious. It also made the extraction of the particles
Even since the shafts had penetrated into the deeper sulphide zone of the lode
the metallurgists had faced grave problems. The first dilemma was the toughness
of the rock which contained the minerals. The garnet was particularly hard, ...
In 1905 metallurgists noticed that when insufficient oil was added to the vat the
granules of metal ceased to form. Instead the violent agitation created bubbles
that floated the metals to the surface in a thick froth that could be skimmed off.
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LibraryThing ReviewUser Review - nandadevi - LibraryThing
The history of mining is central to Australian history, from the gold rushes of the 1860's which brought hundreds of thousand of immigrants, to the mountain ranges of iron ore and immense natural gas ... Read full review