By William Petruk
Options of acting utilized mineralogy investigations, and purposes and features of lately constructed tools for measuring mineral houses are explored during this ebook meant for working towards utilized mineralogists, scholars in mineralogy and metallurgy, and mineral processing engineers. the advantages of utilized mineralogy are awarded through the use of in-depth utilized mineralogy reports on base steel ores, gold ores, porphyry copper ores, iron ores and business minerals as examples. The bankruptcy on base steel ores incorporates a dialogue at the results of liberation, particle sizes and surfaces coatings of Pb, Cu, Fe, Ca and So
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Extra info for Applied mineralogy in the mining industry
3. g. percent mineral of interest in particle). 2 Example of proportion of mineral distributed among different grades of particles. 4). 9 %, 80 - 90 %, particle categories are added sequentially. 4. Liberation data plotted as cumulative liberation yield for mineral in particles of different grades. 1 Note 1: The total amount of mineral is loo%, and it is distributed among particles of all sizes and grades. 9 % of the mineral (bottom row). 51% of the mineral is in particles that are 75 to 106 pm in size (last column).
It is noteworthy that sieves down to 5 |im are available, but it is not practical to routinely use the fine size sieves because: • it takes a very long time (several hours) to produce enough material for a polished section, • the fine sieves arefragileand very expensive to replace. Size distribution of unliberated grains in polished sections can be determined by measuring the sizes and proportions of the exposed surfaces of unliberated grains m each size range. 2. Comparison of size distributions determined by sieve analysis and by image analysis of the same material.
BSE image of a massive sulfide ore. It shows silicate minerals (black), pyrite (grey), sphalerite (light grey) and galena (white). Note: the gain and brightness on the BSE detector were set to bring out the silicates as black. The horizontal line in the photomicrograph is 100 |im long. 2. BSE image of pyrite with trace amounts of Sn. The darker grey areas are pyrite with negligible Sn contents, the lighter zones are pyrite enriched in Sn, the white Areas are galena, and the black is silicates. The horizontal line in the photomicrograph is 100 limlong.