Zinc ore flotation process

• 09-07-20
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Zinc ore flotation process

 

In nature, lead-zinc ore can be divided into sulfide ore, oxide ore, and mixed ore according to the degree of oxidation; among them, single lead sulfide ore or zinc sulfide ore is very rare in nature. Common lead-zinc sulfide ore is mainly lead-zinc sulfide polymetallic ore.

 

Lead-zinc sulfide ore is often accompanied by a variety of valuable components, such as lead, zinc, copper, sulfur and other useful minerals. There is a significant difference in floatability between them, which determines the flotation production process of lead-zinc sulfide ore. Common lead-zinc sulfide ore mainly includes priority flotation process, mixed flotation process, equal flotation process, sub-rate branch flotation process and potential control flotation process.

 

1.Priority flotation process of lead-zinc sulfide ore

 

The lead-zinc priority flotation process is mainly to suppress zinc and float lead first, and then activate zinc to obtain lead and zinc concentrates. According to the order of the flotability of lead-zinc ore, flotation and recovery of valuable minerals such as lead and zinc are carried out.

 

The priority flotation process is suitable for beneficiating rich ores with simple mineral composition, high lead and zinc minerals, and coarse-grained disseminated ore. This process is also suitable for dense massive sulfide ore containing a large amount of sulfide ore. Its advantages are that the production process is easy to control, the quality of the concentrate is high, and the fluctuation of the floatation index is small.

 

2.Mixed flotation process of lead-zinc sulfide ore

 

The lead-zinc sulfide mixed flotation process is to flotate the lead-zinc mixed concentrate first, and then separate the mixed lead-zinc concentrate, that is, first select all the lead sulfide and zinc sulfide minerals into the mixed concentrate, and then the mixed concentrate After drug removal, a separation flotation operation is carried out to obtain a single flotation concentrate.

 

The mixed flotation process can discard a large amount of gangue minerals after rough grinding, reduce the processing volume of subsequent operations, save the amount of separation operation reagents, reduce energy consumption, and be suitable for processing lead-zinc. The floatability difference is small, the grade is low, and the useful minerals are present. Aggregate or dense symbiotic lead-zinc ore.

 

3.Flotation process of lead-zinc sulfide ore etc.

 

The flotation process of lead-zinc sulfide and other flotation processes is to divide lead-zinc sulfide with similar floatability into two parts that are easy to float and difficult to float. Mixed flotation is performed to obtain a mixed concentrate, and then various useful minerals are selected in turn. Separate concentrate. In some ore beneficiation processes, the floatability of some sphalerites is similar to that of most galena, and the floatability of a small part of galena is similar to that of most galena. Therefore, the floatability between lead and zinc minerals should be fully utilized. In the flotation of lead, part of the zinc minerals with good floatability are floated simultaneously, and the remaining lead minerals are floated along with the flotation of zinc, and the mixed concentrate of lead and zinc is selected, and then the separation flotation is carried out. In order to obtain lead concentrate and zinc concentrate respectively. The flotation process is suitable for ores with useful minerals including lead-zinc minerals that are easy to float and difficult to float. The process has the characteristics of a mixed flotation process and a priority flotation process. It can reduce the amount of reagents and eliminate the adverse effects of reagents on flotation separation. It is beneficial to improve the quality and recovery rate of concentrate, but the process flow of the floatable process is more complicated, the flotation time is long, and the equipment consumption is large.

 

4.Sub-rate branch flotation process of lead-zinc sulfide ore

 

The sulfide fractional-speed branch flotation process is mainly for fast-floating and good-floating lead-zinc ore, while the slow and difficult-to-float lead-zinc minerals are left in the subsequent flotation process for separation. This process is suitable for lead-zinc sulfide minerals that have different flotation behaviors due to different embedding components. While obtaining better flotation indexes, it can reduce the configuration volume of the flotation machine, reduce metal circulation and loss, and reduce The consumption of medicine simplifies the technological process.

 

5.Potential control flotation process of lead-zinc sulfide ore

 

The essence of lead-zinc sulfide potential control flotation is to control the process and direction of the oxidation-reduction reaction on the surface of the sulfide mineral in the slurry system by changing the electrochemical conditions of the flotation system during the flotation process of the sulfide ore, thereby affecting the surface state of the sulfide ore And the product form and stability of the collector on the surface of sulfide ore, increase the hydrophilic-hydrophobic properties of the surface of sulfide ore, so as to achieve the purpose of selective flotation and separation of sulfide minerals.

 

The potential control flotation process has the characteristics of low dosage of chemicals, simple formula, low environmental pollution and high selectivity, and is especially suitable for the separation of low-grade lead-zinc sulfide ore.

 

The material composition of lead-zinc ore is particularly complex. The different material compositions of the ore have different dip and mosaic characteristics, which determines that the ore has a different flotation process. Whether the selection of the flotation process is appropriate will affect the flotation effect. It is recommended that all mine owners formulate a scientific and reasonable flotation process based on the report to avoid unnecessary economic losses.