After the initial selection of the ore in the sorting process, such as flotation, re-election or magnetic separation, the useful components in the ore are initially enriched, and the obtained product grade is higher than the original ore, lower than the final concentrate, so that the useful components are first The enriched process is called a roughing operation. Roughing operations result in coarse concentrates and selected tailings. The coarse concentrate is re-selected to obtain a qualified concentrate. This operation is called a selection operation. Sometimes it takes several times to select the coarse concentrate to get a qualified concentrate. The operation is called a selection, secondary selection, and three selections...
Generally, the rough-selected tailings cannot be discarded as the final tailings. The rough-choice tailings should be selected for the next operation. This operation is called sweeping. In order to reduce the tailings grade and increase the recovery rate, it is sometimes necessary to perform multiple sweeps to obtain the final tailings.
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