What’s New DIRECTIONAL DRILLING
A new, automatic directional drilling tool has been successfully tested in Canada by Redpath Raiseboring of North Bay, Ont. The tool was developed by Bergbau- Forschung and Schwing Hydraulik Electroni…
News
COMPUTER PROCESS CONTROL Part 1
There is a wide distribution in the Tdegree to which process control Tis applied in North American gold mills. We believe that the distribution is decidedly skewed toward pre dominantly manual contro…
LEACH PAD LEADERS
Heap leachers continue to refine their techniques for fatter profits. By Olav Svela Innovation has been a hallmark of the heap leachers. That may be because this mineral extraction process itself was…
MINING GOES GREEN
Industry and government are grappling with the question of how much pollution is acceptable Nineteen eighty-nine is shaping up to be the year of decision on the environment. Industry and business have…
50 Years Ago GEOLOGY FOR THE LAYMAN
We have heard comments occasionally that readers of mining news sometimes miss the significance of a report because they do not understand the implications of geological information given. Accordingly…
Specs cs **
** CONTINUOUS PROCESSES ** Solids/liquids separation has gone through quite a change over the past decade. This mineral processing circuit was once dominated by drum or disc filters. But the vacuum fi…
50 Years Ago COBALT WORTH MORE THAN SILVER
A delegation from Cobalt and surrounding areas seeking a bonus on silver for the Cobalt and Gowganda silver areas of Ontario has waited on the Dominion government, but the outcome has not been announc…
EMVIRONMENTAL POLICY UNVEILED
The following is the new environmental policy of The Mining Association of Canada: Member companies of the mac are committed to the concept of sustainable development, which requires balancing good st…
50 Years Ago GOLD REACHES NEW PLATEAU AS SEVERAL CURRENCIES BREAK
The expected has happened. The pound has fallen and gold has gone to a new high price in London, the world’s one great open market. The news is important, for even though the drop came co-incident wit…
CYANIDE SOLUTIONS TIONS
An increasing number of Canadian gold mills are turning to chemical treatment processes to destroy and recycle toxic cyanide. Today, environmental protection laws in Canada are increasingly patterned …
Letters GROUND CONTROL
Your article entitled “King of Zinc,” regarding Brunswick Mining & Smelting (see April issue), contained several errors. In the section on ground control/rock mechanics, you say the cable bolts and st…
50 Years Ago CURRENCY PROBLEMS FOR GOLD MINES
Unless there is war, which now looks remote, the premium in United States funds may shortly diminish, leaving us little gain from a fall in sterling which looks likely to settle the pound quotation at…