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1. Surface Preparation The success of soldering hinges on proper surface preparation. Before soldering, it is essential to remove any oils, dirt, or oxidation from the surface. For galvanized iron, this often means using a wire brush or sandpaper to clean the area. It's also critical to remove the zinc coating at the joints to promote better adhesion.
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Cyanidation is preferred in the gold mining industry for several reasons. First, it is highly efficient; cyanide can extract up to 97% of available gold from ores, making it suitable for low-grade deposits that would otherwise be economically unfeasible to mine. Second, the process is relatively cost-effective compared to other extraction methods, such as gravity separation or amalgamation with mercury.
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