The copper-lead-zinc mineral processing process adopts a mixed flotation-concentrate regrinding process, which can reduce grinding costs and is easy to manage. At the same time, new non-toxic flotation reagents are applied, which are efficient and environmentally friendly.
The mixed flotation-concentrate regrinding process is generally suitable for copper-lead-zinc sulfide ores that have a close symbiotic relationship, are difficult to dissociate, and have uneven particle sizes.
The copper-lead mixed concentrate regrinding process eliminates the need to finely grind all raw ores, saving grinding costs. At the same time, the concentrate regrinding further dissociates the copper-lead concentrate into monomers, and has a good detoxification effect, forming copper and lead. Separation creates favorable conditions.
Strictly implement the pharmaceutical system in the rough selection section, control the dosage of pharmaceuticals, and achieve "harvest as early as possible" to reduce multiple cycles and inaction losses; make full use of the secondary enrichment effect of foam, and do not add water appropriately to The concentrate foam is rinsed to reduce impurities in the foam to achieve the purpose of enhanced flotation.
In the flotation stage, the copper-lead mixed concentrate is separated first, and after regrinding, flotation is used to separate lead concentrate and copper concentrate. The two concentrates are dehydrated separately.
The tailings of copper-lead mixed flotation are stirred and slurried, and then zinc concentrate flotation is carried out. The resulting concentrate product is dehydrated and becomes a zinc concentrate product.
Take Xingaonai Mining Tibet as an example. The mine is designed to produce 600,000 tons/year, process 2,400 tons of ore per day, and have 250 working days per year. The project is divided into two phases. The first phase has a designed scale of 300,000 tons/year, processes 1,200 tons of ore per day, and the second phase has a designed scale of 300,000 tons/year, processes 1,200 tons of ore per day. The beneficiation method adopted by the project is flotation, and the products are planned to be lead-antimony concentrate and zinc concentrate. The main design indicators are: output, lead-antimony concentrate 10.9%, zinc concentrate 2.58%; concentrate grade, lead-antimony concentrate Pb32.17%, Sb28.11%, zinc concentrate Zn59.9%; recovery rate, lead-antimony concentrate Pb85.11%, Sb82.59%, zinc concentrate Zn88.82%.
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