배소공정
조액공정
(용해, 정액)
전해공정
주조공정
건식 아연 잔사 처리 공정
ZLD 공정
Roasting Plant
A process of heating zinc concentrates at a roaster at around 950°C and converting it into zinc oxide
This process converts zinc sulfide concentrate into zinc oxide, preparing it for the hydrometallurgical process (dissolution and purification).SO2 gas generated during the process of converting zinc sulfide concentrate into zinc oxide is used to manufacture sulfuric acid in the sulfuric acid manufacturing process. Zinc oxide (known as calcine) after desulfurization is transferred to the dissolution process.
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Leaching & Purification Plant
The process of making zinc solution through leaching and purification plant from the calcine as the main raw material.
Leaching Plant
It is a process in which calcine, produced by desulfurization during roasting, is reacted with sulfuric acid to convert zinc into an aqueous solution.The calcine, transformed into a suitable oxide form during roasting, reacts with sulfuric acid to recover the target metal, zinc, in the form of a ZnSO₄ aqueous solution.During this process, impurities contained in the calcine are also dissolved, and these impurities are subsequently removed in the purification process.
Purification Plant
This is a process to remove impurities from the neutral solution carried over from the leaching process.The neutral solution contains not only zinc but also various impurities dissolved in aqueous form after reacting with sulfuric acid.To remove these impurities, a cementation method is used, which leverages the difference in ionization tendencies between zinc and the impurities.The purified solution, which has a high zinc content after impurity removal, is then sent to the electrolysis process.
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Electrolysis Plant
A process of electrolyzing the zinc solution and making it into zinc sheets
This process recovers zinc by electrolyzing the zinc aqueous solution (purified solution) after removing impurities.
Zn metal is deposited onto a cathode by passing an electric current through the zinc aqueous solution after placing plates (anode, cathode) into the solution. A sufficiently deposited zinc sheet is stripped from the cathode and manufactured into products in the casting process.
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Casting Plant
A process of melting the Zn metal sheet in an electric furnace and manufacturing general zinc, combination zinc, zinc alloy, etc., through casting machine
This process involves melting the zinc manufactured during electrolysis, casting it into molds and manufacturing as products according to product group.
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Top Submerged Lance
A process of converting a byproduct inevitably generated during the zinc smelting process into clean slag to be reusable.
It is a process of recovering zinc remains from residues after dissolving zinc oxide.
The treatment of the residues is important to improve the recovery rate of zinc because about 19% zinc remains in the residues and conventional cake after dissolving zinc oxide.
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ZLD (Zero Liquid Discharge)
An advanced wastewater treatment system utilizing evaporators, crystallizers, and solid-liquid separators to process industrial wastewater
This zero-liquid discharge (ZLD) system completely treats wastewater generated from manufacturing processes, ensuring that no effluent is released externally.
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