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US 4,056,262 AGranted
Cupola furnace to enable continuous smelting and refining of cement copper and method therefor
AssigneeCompania de Acero del Pacifico S.A.
InventorsDouglas Pollock, Omar Sobarzo, Rolando Urquizar, Carlos Vilches, Jaime Bolanos
Life of this patent
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Abstract
Use of a shaft kiln in continuous smelting and refining of cement copper is made possible with a mix preheater, a refined gas preheater, an air preheater, an air mix feeder and forehearths for cement oxidation and reduction, and wherein oxidation is achieved by injecting oxidant gases and reduction by injecting preheated petroleum gas, subsequent to having placed a layer of charcoal on the smelt.
Claims8
A shaft kiln comprising:
- an upper gas chamber;
- an intermediate stack zone including coke-charging means;
- a lower hearth zone including air-injecting tuyeres;
- charge preheating means utilizing sensible heat from said upper gas chamber;
- pneumatic charge injecting means adapted to inject said preheated charge into said intermediate zone;
- gas off-take means in communication with said gas chamber;
- and
- heat exchange means within said off-take means.
5 more elements
Dependencies are inferred from the claim text.