The results of these investigations show that bournonite (PbCu-SbS3) is present in the ores in greater or less quantity. This fact has never before been
Turbo blowers for blast-furnace blowing have now been in use for some years, and a review of the experience gained and the present state of
Before treating for arsenic it’s important to understand both arsenic composition and water chemistry. Arsenic (As) is a natural occurring mineral commonly found in clusters
Most metallurgists appreciate the great need of a process for the extraction and recovery of valuable metals from complex ore, where the presence of one
While the reducing action of organic matter, of ferrous sulphate, and of hydrogen sulphide has frequently been invoked to account for the deposition of native
The valuable results that have followed the application in recent years of microscopic methods of research to problems of ore genesis have been significant, but
The Rawley property is located in the Kerber Creek mining-district, Saguache county, Colorado, at an elevation of 10,600 ft. (See sketch-map, Fig. 1.) Ore was
The use of hammer drills for obtaining samples in underground work has increased in recent years. This method has advantages where holes are short, ground
The advantages of obtaining core samples that provide a visual record of the rocks and ores sampled and at the same time furnish samples for
Grab sampling usually consists in taking portions of ore at random from muck piles, chutes, or the tops of cars of ore. When done in