TARKIB PARDAZAN Zanjan Product
Zinc Ingots
Zinc ingots are among the strategic and widely used metal products in various industries around the world. They are produced through the extraction and purification of zinc (Zn). Zinc is one of the lightweight non-ferrous metals with unique properties, including high corrosion resistance, alloying capability, suitable conductivity, and a bright surface. Zinc ingots are typically produced in standardized and uniform forms and serve as the primary material for many industrial processes.
Zinc is one of the most important and widely used non-ferrous metals in the world. Its role in protecting structures, developing industries, and increasing the durability of industrial products is undeniable—from galvanizing lines to the automotive and battery industries. Zinc ingots are consistently used as a fundamental and key raw material.
The Importance of Zinc Ingots in the Global Market
Zinc is the fourth most consumed metal in the world after iron, aluminum, and copper. With the expansion of galvanizing industries and the growing need to protect structures, demand for zinc ingots continues to increase steadily.
In such a market, only ingots with transparent analysis, consistent quality, and reliable continuous supply are accepted.
Due to the vital applications of this metal in infrastructure, automotive manufacturing, energy, and technology, zinc ingots play an important role in the sustainable growth of the industrial economy.
Applications of Zinc Ingots in Industry
Zinc ingots are used across a wide range of industries, including:
- The galvanizing industry for coating steel and increasing its resistance to corrosion
- Production of brass, Zamak, and other industrial alloys and compounds
- Battery manufacturing
- Production of automotive components and electrical appliances
- Production of chemicals and zinc oxide
- Construction industries and protective coatings
1
Slurry Preparation and Initiation of the Leaching Process
In the first stage, zinc concentrate is mixed with spent solution (recirculating process water) to form a slurry. The slurry is then introduced, together with sulfuric acid, into mixer tanks to initiate dissolution reactions. At this stage, the primary objective is to release zinc ions from the ore.
2
Removal of Impurities and Formation of Leach Cake
After the zinc is released, a controlled amount of lime is added to the slurry so that impurities such as iron precipitate and are separated from the solution.
The slurry is then transferred to the filtration unit. The output of this stage consists of:
- Zinc-rich solution
- The remaining solid, known as “leach cake”
The leach cake, which still contains some zinc, is washed again with acid until the remaining zinc content is reduced to less than 1%.
3
Solution Purification and Removal of Impurities
The filtered solution, containing approximately 100 grams per liter of zinc, enters preheating and heating tanks. In this section, potassium permanganate and lime are added, causing cobalt to precipitate as a solid and separate in the form of “cobalt cake.”
The solution then enters a cooling tank, where nickel and cadmium are removed by adding zinc powder, forming a precipitate known as “nickel cake.”
The purified solution is subsequently transferred to the makeup tank to be prepared for entry into the electrowinning section.
4
Electrowinning: Converting Ions into Zinc Sheets
In the electrowinning unit, the prepared solution flows through cells equipped with aluminum anodes and cathodes. As electric current passes through the cells, the zinc ions in the solution are deposited onto the cathodes, forming layers of zinc sheets. Once the sheets reach the required thickness, they are removed from the cathodes.
5
Casting and Production of Zinc Ingots
The produced zinc sheets are transferred to casting furnaces, where they are melted and poured into standard molds. The output of this stage is high-quality zinc ingots with internationally standardized purity.
6
Spent Solution Recycling and Return to the Beginning of the Process
The remaining solution in the electrowinning cells, which still contains a small amount of zinc, is returned to the beginning of the production line as spent solution. This process enables material recovery, reduces consumption, and increases overall efficiency.
TARKIB PARDAZAN Zinc Ingots
TARKIB PARDAZAN Zanjan, relying on technical expertise, industrial experience, and the use of up-to-date technologies, produces zinc ingots as a strategic and reliable product that meets the requirements of domestic industries and international markets.
The final product is the result of a precise chain of leaching, treatment, purification, and electrowinning operations. These processes are carried out using standardized industrial equipment and continuous monitoring of technical parameters to ensure that the final product achieves a reliable level in terms of chemical composition, structural uniformity, and suitability for industrial applications.
High purity and consistent quality are among the key advantages of TARKIB PARDAZAN zinc ingots; an advantage that has enabled the company to establish a successful presence in international markets and export more than 80% of its products to global markets.
This commitment to quality forms the foundation of long-term relationships with domestic and international customers.
Conclusion
Zinc ingots are valuable metal products with extensive applications and outstanding technical properties, playing a central role in many modern industries. The quality, purity, and consistency of this product directly influence the performance and durability of numerous processes and structures. Therefore, producing zinc ingots in accordance with global standards is of particular importance.