(from the article `copper processing`) ...into the fluid. Iron and sulfur are converted to oxides and are removed in either the gas stream or the slag (the latter being recycled for the ...
Crude copper assaying 96-99% Copper prior to final fire refining.
A crude form of copper (assaying about 98% to 99%) produced in a smelter that requires further refining before being used for industrial purposes. The name is derived from the large blisters that form on the cast surface as a result of the liberation of sulfur dioxide and other gases.
[n] - an impure form of copper having a black blistered surface
The copper produced after sulphur is removed; it is made by blowing air through the mixture; this produces gaseous sulphur dioxide which forms blister-like bubbles on the surface.
noun an impure form of copper having a black blistered surface
a matte of from 96 to 99 percent copper, having a blistered surface after smelting because of gases generated during solidification.
Copper of about 98% purity obtained by 'converting' copper matte.