Lead zinc ore sorting, flotation-based, it can also be used jointly reselection and milling processes. Due to the uneven grain size of various minerals in lead-zinc ore, different ores should have corresponding grinding and flotation processes.
Separation of lead-zinc ore sulfide The process of flotation of lead-zinc ore is: (1) Priority flotation process (Figure 1). This process is mostly applied in China's lead and zinc mines. (2) Partial hybrid flotation process (Figure 2). There are also many applications in China. (3) Full hybrid flotation process (Figure 3). (4) Pre-selection of heavy medium—Pb-Zn is the preferred flotation process. (5) Heavy medium pre-selection-flotation-re-election combined process: For ores containing lead, zinc, sulfur and tin , pre-selection by heavy medium beneficiation method, discarding about 35% of waste rock; flotation adopts stage grinding, In the process of stage sorting, lead and zinc concentrates are selected in turn; after the iron ore is selected by flotation of zinc tailings, the tin concentrate is selected by turning the bed. (6) Waiting for the floatable flotation process, the minerals to be recycled are divided into two parts: easy floating and difficult to float according to the principle of equality of floatability, respectively, mixed flotation, to obtain mixed concentrate, and then separate various useful A separate concentrate of minerals. (7) Asynchronous hybrid flotation process. In the whole process of lead-zinc mixed flotation, artificially control the pH of the pulp, the inhibition and activation conditions, the strength of the collector, and other factors to ensure that the lead and zinc minerals are not synchronized under their respective suitable flotation conditions. Fully exert its unique floatation, so that high beneficiation indicators can be obtained.
Figure 1 Priority flotation process
Figure 2 Partial hybrid flotation process
Figure 3 Full hybrid flotation process
Sorting of mixed lead-zinc ore The priority flotation process of separating lead sulfide, lead oxide, zinc sulfide and zinc oxide in turn is adopted. Lead oxide and zinc oxide are usually vulcanized with a vulcanizing agent prior to flotation and then floated.
The method of processing lead-zinc ore conventional oxidation are: (1) a first vulcanizing agent, and then xanthate flotation of lead oxide, zinc flotation by amine oxide; (2) heat curing with steam first and then copper sulfate Activation, and finally the use of xanthate to capture zinc oxide minerals; (3) For the lead-zinc ore that is not suitable for flotation, the heavy medium selection-Wilz method-emperor smelting method-smelting-smelting process can be used.
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