Fundamental Studies on Copper Smelting (4)

CODELCO, Chile Programs Its Copper-Smelting Operations

CODELCO’s Chuquicamata Copper Smelter, located in Chile, must meet an environmental standard established in 2002 that limits the sulfur emissions from the copper-production process. This regulation placed new restrictions on the production process, and consequently the heuristic criteria based on years of operator experience no longer resulted in high production levels. We developed a model to ...

Recirculation of Chilean Copper Smelting Dust with High Arsenic Content to the Smelting Process

Most of the dust generated from the copper smelting process in Chili has been stored after the stabilization by hydrometallurgical process because it contains high concentration of arsenic. However, in recent years, the generation of dust has increased because of degrading the quality of concentrate. In addition, the environmental regulations become stricter. On the other hand, valuable metals ...

Effect of grinding time on flotation recovery of copper smelting slags in Bardaskan district

Copper smelting slags are hard materials. Therefore,to recover their copper by flotation method, grinding should be carried out to obtain optimal particle size. Copper smelting slags in the Bardeskan district, with work index of 16.24 kwh/st, were grinded for 65 minutes to reach an acceptable degree of freedom for the flotation tests, with particle size of 80%, smaller than 70 μm. With this gri...

Studies on Copper Metabolism*

The results of studies on certain enzymes, hemin chromoproteins, and iron and copper in the tissues of normal, copper-deficient, and iron-deficient swine are reported in this paper. It has been suggested that the enzymes cytochrome oxidase (l-3), uricase (4), tyrosinase (5), plasma polyphenol oxidase (coeruloplasmin) (6), glutathione oxidase (7), and butyryl coenzyme A dehydrogenase (8) either ...

Studies on copper metabolism. XXXI. Erythrocyte copper.