Introduction
The process of smelting zinc ore using the ZGMn13 oxidation method is one of the most suitable and efficient methods that can be used to produce high purity zinc. This method involves ore reduction, controlled oxidation, and slagging. ZGMn13 oxidation method is often the preferred method of zinc smelting when the zinc ore deposit is characterized by high silicate content and when there is a need to reduce energy cost.
Ores Reduction
The ZGMn13 oxidation process involves the charging of zinc ore concentrate, coke, lime, and fluorspar into the furnace. The coke is burned in order to raise the temperature of the furnace and reduce the zinc content of the ore. The addition of lime helps to lower the silicate content of the ore, making it easier for the zinc to be extracted from the ore concentrate and for an oxidation reaction to take place. The fluorspar not only helps to reduce the zinc oxide contents of the ore but also assists in maintaining a consistent temperature in the furnace.
Controlled Oxidation
Once the ores reduction step is completed, the controlled oxidation of the zinc ore concentrate can then begin. Oxygen is introduced into the furnace to help oxidize the zinc ore and separate it from the other metals present in the ore. This oxygen is usually added over a period of time and in a controlled manner, in order to give the zinc the opportunity to react with the other elements and form a zinc oxide condensate.
Slagging
Once the oxidation step is completed, the zinc oxide condensate is then removed from the furnace and cooled to a lower temperature. At this point, the slagging of zinc ore concentrate can begin. During the slagging process, any remaining metals, such as lead, iron and cobalt, are removed from the ore concentrate. The slag is then cooled and smelted in an inert atmosphere in order to separate the zinc from the other elements.
Conclusion
The ZGMn13 oxidation method is a cost-effective and proficient method of smelting zinc ore. By charging the furnace with coke, lime and fluorspar, reducing the zinc content of the ore, and then allowing controlled oxidation, the zinc is separated from the other metals. Finally, slagging is used to remove any remaining metals from the ore concentrate. This method allows for extremely high purity zinc to be produced.
