UTAH ACADEMY OF SCIENCES 231 
ZINC ORES. 
One of the many valuable features of the process 
is the fact that zinc in oxidized ores is practically non- 
volatile in an oxidizing atmosphere. Thus with an ore 
carrying zinc, silver, and lead, the object of the treatment 
would be to chloridize and volatilize the silver and lead 
and to leave the zinc in the calcines. 
The decrease in weight of the ore, due to heating, 
causes a concentration of the zinc in the calcine. Thus 
an ore assaying 30 per cent zinc, after such treatment, 
would in some cases assay 36-38 per cent zinc, depending 
of course on the character of the ore. 
ADVANTAGE OF THE PROCESS. 
1. The plant can be installed and operated near 
the mine, as the water consumption is not great. 
2. Transportation costs are greatly reduced. 
Importation of fuel and chloridizing, reagents 
together with the exportation of bullion and possibly some 
by-products, would include the bulk of transportation. 
Relative weights would be, for each ton (2000 
pounds) of ore treated, it would require not to exceed 
200 pounds of fuel and 300 pounds of chloridizing re- 
agents. 
The bullion to be exported would possibly not exceed 
300 pounds. Thus for each ton of ore the transportation 
necessary would in all probability not exceed 800 pounds. 
3. Elimination of smelter charges. 
4. High per cent recovery of the metal values from 
the ore could be effected with relatively low operating 
costs. 
5. The advantage of converting practically all of 
the valuable contents of the ore into commercial products. 
6. Laboratory experiments indicate that the process 
is flexible and can be applied to a large variety of ores. 
