A laboratory smelting study was conducted on a copper ore containing chalcocite and native copper to test the technical feasibility of non-pyritic smelting (low pyrite).
As a continuing endeavor, the Bureau of Mines is developing columbium and tantalum alloys for high-temperature applications. This investigation was undertaken to improve the high-temperature
The purpose of this investigation was to determine the flotation characteristics of important columbium / tantalum ore minerals as a guide for the practical concentration
A temperature of 250° to 260° C was found to be satisfactory for simultaneous removal of iron and manganese from the pregnant leach liquor resulting
Model studies, using rock, require carefully prepared specimens. Most preparation procedures use some form of grinding or polishing as the last of several steps. During
Tests on electrorefining of yttrium were performed in LiCl-YCl3 electrolytes at 710° C, and the deposits were subjected to vacuum-distillation at 880°C to remove salt
Low-temperature chlorination of three types of ferrochromium at 340° to 525° C chlorinated an average of 89 percent of the chromium and 95 percent of
Sound ingots of Zn-Cu-Ti alloys can be semi-continuously cast under appropriate conditions. A modified mold design on a specially constructed, semi-continuous casting stand has permitted
Accidental firings of explosive initiators have occurred occasionally with some uncertain correlation to the pneumatic loading of ammonium nitrate-fuel oil (AN-FO) blasting agents. The exact
The major conclusion to be drawn from the four series of tests is that reasonable care in preparing specimens and conducting compression tests on a