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Lead Refining Furnace
The system consists of a Refining Kettle/Furnace/Pot, Shell, Refractory Lining, Exhaust duct, Agitator, Hood & Burner etc. The hood is provided with each refining kettle to capture all smoke and dust from refining operations and convey them to the filtration system consists of Filter Bag house, ID Fan & Stack duct. Wet scrubber can also be provided optionally as & when required to follow specific country environment norms.
The air fuel burner is used for melting the lead ingots and keeps the lead bath at the needed temperature.
The refining of Lead is a Pyrometallurgical process and removal of different unwanted elements/impurities present in the Lead bullion, namely: antimony, tin, arsenic, copper and iron, which is done by the addition of some reagents at proper temperature with severe agitation to the lead bath, producing Lead with a minimum purity level of 99.97% from Smelting furnaces tapped crude Lead.
The drosses from the refining operations are rich in copper, antimony and tin and are to be process in the furnace to obtain rich antimony-lead or lead-copper alloy.
The same System/Equipments as mentioned above is used for Lead Alloying, where the raw material used is either Crude Lead from the Rotary Furnace Or Refined Lead from the refining furnace, based on the alloy need to be produced. The process for each alloy (say antimony alloy, selenium alloy Or Calcium alloy etc.) is different & properly explained/trained at time of Plant commissioning.