Yinshan Lead-Zinc Mine Concentrator (2)

Closed-circuit grinding process using a period, is divided into three series, wherein two series were treated copper grade containing more than 0.2% copper, lead, zinc and copper ore grade of less than 0.2% of lead, zinc ores, grinding fineness Both are less than 0.074mm65~70%, and the other series is processed with lead and zinc ore. The grinding size is less than 0.074mm60~65%.
The copper, lead and zinc systems adopt the mixing-separation flotation process. The process flow and technical conditions are shown in the following figure. The process indicators are shown in the following table:

The lead, zinc and sulfur systems adopt the branching and split-speed preferential flotation process, that is, the lead is first selected, the lead tail is mixed into zinc and sulfur, and the zinc and sulfur are separated by mixing. The lead ore is divided into two. The first process structure is the second rough selection, three sweeps, the first selection of the first tank foam directly into the second selection of the second, the second and third tank of foam into the second ore, sweeping the foam separately Entering the corresponding sweeping operation of the second flotation system, the first rough selection and sweep selection are open circuit sorting. The second process structure is secondary rough selection, three sweeps, and three selections. The rough-selected one- and two-slot foams were selected twice to obtain qualified lead concentrates, and the three-, four-, and five-slot rough-selected foams entered the first selection operation, and the three-stage cleaning foams were returned to the previous operation. See lead, zinc, sulfur system lead branch, speed separation process flow chart:

The lead and zinc systems adopt the preferential flotation process. If sulfur is required, the zinc and sulfur mixed flotation is carried out. The mixing and mixing of the lead, zinc and sulfur systems are combined, and the foam is pumped to the zinc and sulfur separation operation. The process flow is shown in the figure below:

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