Zinc is a base metal, which is used primarily for corrosion protection for metal parts. Main producers are China, Peru and Australia. Furthermore, it is used for alloys (brass) and low-cost injection-molded parts. Increasing the zinc requirement by the worldwide industrialization rising steadily for years and has developed in recent years almost tripled to 4.000 USD / ton.
As worldwide produce more and more industrial plants, probably also increases the zinc requirement and thus the price has continued to rise.