Since nearly half of the open pit surface mines in the U.S. produce sand and gravel (aggregate), lots of questions tend to come up about the equipment used in that type of mining. As you can imagine, it takes a range of both mobile and stationary equipment Apr 15, 2019 There are two basic steps to gold mining prospecting and production. Prospecting refers to the actual search in a certain area for valuable minerals, and production, also known as mining, is the physical act of removing the gold from where you found it.Since different equipment exists for prospecting and mining, this article explores, briefly, equipment used Sponsored Listing It can be used not only for placer gold mining, but also for hard rock mining to recover the natural gold, replacing amalgamation. 2. Under the action of centrifugal force, the process of gravity separation is strengthened and the separation time is much shortened.