Lead-zinc ore beneficiation

The material composition of lead-zinc ore is more complex. The different material composition and characteristics of lead-zinc ore determine the different mineral processing processes of lead-zinc ore.Usually lead-zinc sulfide ore is flotation, and lead-zinc oxide ore is reselected + flotation combined mineral processing.If the lead-zinc ore contains a variety of metals, joint mineral processing methods such as reselection + flotation, magnetic separation + flotation, reselection + magnetic separation + flotation can usually be used.

It can be seen that the lead-zinc ore dressing process is inseparable from flotation.Whether the selection of lead-zinc ore dressing technology is appropriate will affect the flotation effect.It is recommended that each mineral processing plant formulate an efficient and reasonable flotation process based on the mineral processing test report to avoid unnecessary economic losses.

Mineral processing of Lead-zinc sulfide ore

Lead-zinc sulfide ore is often associated with a variety of valuable ingredients, such as lead, zinc, copper, sulfur and other useful minerals.There is a significant difference in the floatability between them, which determines the production process of lead-zinc sulfide ore by flotation method.The common flotation processes of lead-zinc sulfide ore mainly include priority flotation processes, mixed flotation processes, and other flotation processes, split-speed branch flotation processes, and potential-regulated flotation processes.

Mineral processing of Lead-zinc oxide ore

There are four main methods of mineral processing technology for lead-zinc oxide ore: vulcanization flotation method, direct flotation method of anion collector, chelating agent + neutral oil flotation method, leaching + flotation method.Vulcanization flotation method is one of the more important methods.

Main processing steps

Crushing: First, use a jaw crusher to initially crush the raw ore, reduce the particle size of the ore, and prepare for subsequent grinding.
Grinding: The broken ore is further ground by a ball mill to fully dissociate the lead-zinc minerals in the ore.
Grading: The ore slurry after grinding is graded by a spiral classifier to ensure that the appropriate particle size distribution enters the flotation process.
Flotation: Flotation is the core link of lead-zinc ore mineral processing. By adding flotation agents, the differences in mineral surface properties are used to achieve the separation of lead-zinc minerals from gangue.
Concentration: The slurry after flotation is increased in concentration through a thickener to prepare for the next dehydration.
Dehydration: The concentrated lead-zinc concentrate is dehydrated through a filter to obtain a dry concentrate product.

Advantage
High efficiency: Lead-zinc ore dressing technology can efficiently process large quantities of ore and quickly extract valuable minerals.
Flexibility: According to different ore properties and market needs, the process flow and parameters can be adjusted.
Environmental protection: Modern mineral processing technology focuses on reducing environmental pollution and adopts environmentally friendly agents and equipment.

Production example
A lead-zinc mine in Mexico has an output of 200tpd. Combined with the characteristics of the ore, Xingmuang Group has designed and adopted some new priority flotation processes, and obtained good mineral processing indicators. Among them, the grade of lead concentrate is as high as 66.52%, and the recovery rate is 88.5%, which has reached the advanced level of the same industry.The main equipment configuration is as follows：