Excerpt from The Enrichment of Sulphide Ores Sulphide ores exposed to weathering at or near the surface of the earth break down and form soluble salts and minerals that are stable under surface conditions. No metallic sulphide that is long exposed to air and water remains unaltered. Iron sulphides, which are present in practically all sulphide ores, are changed by weathering to iron oxides, and the changes are attended by the liberation of sulphuric acid. Many of the metals form soluble sulphates with sulphuric acid, and ...
Read More
Excerpt from The Enrichment of Sulphide Ores Sulphide ores exposed to weathering at or near the surface of the earth break down and form soluble salts and minerals that are stable under surface conditions. No metallic sulphide that is long exposed to air and water remains unaltered. Iron sulphides, which are present in practically all sulphide ores, are changed by weathering to iron oxides, and the changes are attended by the liberation of sulphuric acid. Many of the metals form soluble sulphates with sulphuric acid, and when conditions favor their migration downward they are carried in solution to depths where air is excluded. Unoxidized rocks are in general alkaline. Acid solutions that encounter such rocks in the regions where air is excluded will lose acidity, and as the solutions approach a neutral or alkaline condition some of the metals they con tain are deposited. If the solutions of the metallic sulphates encounter metallic sulphides in depth precipitation may take place, or there may be an interchange between the metals in solution as sulphates and the metallic sulphides. Thus as a result of precipitation or chemical interchange the metals are redeposited and certain portions of the ore bodies become enriched. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Read Less
Add this copy of The Enrichment of Sulphide Ores Classic Reprint to cart. $32.44, new condition, Sold by Paperbackshop rated 5.0 out of 5 stars, ships from Bensenville, IL, UNITED STATES, published 2018 by Forgotten Books.
Add this copy of The Enrichment of Sulphide Ores (Classic Reprint) to cart. $58.83, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2018 by Forgotten Books.