May 19th, 2011 | 
Author: CONCENTRATION OF PLACER GOLD ORE
The recovery of placer gold involves processing similar to the processing of most ores. First, the valuable material is separated from the valueless waste through concentration. The final concentrate, usually obtained by repeated processing, is smelted or otherwise refined into the final product. This report focuses on the equipment and methods used for initial processing, or concentration. As in other processing applications, many specialized terms are used to describe the phases of mineral concentration. Although these terms are described herein as they relate to the processing of placer gold ores, most of the terms identified apply to mineral processing in general.
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Why do we not have electric vehicles yet? A 2006 documentary film explores the creation, limited commercialization, and subsequent destruction of the electric vehicle in the United States (specifically the General Motors EV1 of the mid 1990s). The film explores the roles of automobile manufacturers, the oil industry, the US government, the Californian government, batteries, hydrogen vehicles, and consumers in limiting the development and adoption of this technology. Why this recalcitrance on the part of our political leaders? One word describes it all, “GREED”.
“A geothermal power plant uses its geothermal activity to generate power. This type of natural energy production is extremely environmentally friendly and used in many geothermal hot spots around the globe.
To harness the energy, deep holes are drilled into the earth (much like when drilling for oil) until a significant geothermal hot spot is found. ”
“Project Objectives
The project objectives were to develop an energetic material with the following characteristics.
First, an explosive must perform in order to complete the designed task (i.e. break up of rock formations). As a goal, therefore, very high performance (comparable to the explosive H-6) was of primary importance. While the performance of H-6 is very high (relative to typical commercial explosives) it would not be very difficult to reduce performance (once achieved) so that insensitivity could be improved. Additionally, there is a significant amount of data available on H-6 which could permit its use for comparative purposes. Also, the employment of more powerful explosives would reduce the overall quantity of explosives required to perform a specific operation, thus improving safety even further.”
