Outotec can supply you with modern and efficient solutions for zinc casting. Our high-tech machinery provides you with an outstanding final product.
The casting plant consists of three departments: melting and casting, dross treatment and zinc dust production. In the melting and casting department, cathodes are molten and cast into zinc slabs or jumbo ingots. Molten zinc can also be alloyed in holding furnaces to achieve special final products. Oxidation and chemical reactions form dross on top of the zinc bath in the melting furnaces. This is treated in the dross treatment department. Zinc dust is used in the purification process and the powder is granulated from pure zinc melt.
Outotec has very long experience in casting different metals. This has helped us to develop efficient and reliable casting machines. The fully automatic casting machines allow you to run the casting plant 24 hours a day, 7 days a week.
Every stage in 25-kg slab ingot casting can be automated in the Outotec® Slab Ingot Casting Machine. This makes the machine very reliable and it has a high capacity. A robot performs skimming, which results in a smooth surface. A two-stage cooling system allows online strapping of the zinc stacks. Cooled slab ingots are stacked with a robot that can also replace rejected slab ingots. In the final stage, the stacks are compressed, weighed, marked and strapped. The machine produces 1-tonne zinc stacks that are ready for shipping.
Outotec has developed an automatic linear jumbo casting machine that has a short cycle time. The jumbo casting machine can use a robot for skimming and sampling, which skims both the moulds and the pouring tundish. After pouring, the moulds are transferred into cooling boxes with hot tops. The ‘hot topping’ ensures that the ingots are cavity-free. The cooled jumbo ingots are weighed and marked with high-temperature ink. All these stages help the zinc producer to make high-quality products for the customers.