Pure Lead
BATTERY BREAKING PROCESS
De-sulphurisation of Paste
Battery paste is de-sulphurised using sodium carbonate before ready for smelting. Previously collected battery acid is also converted to sodium sulphate in the same process.
Smelting
The smelting process, battery plates, Lead pest recover from plastic and other consumable insert in rotary chambers and converts them into lead bullion via means of rotary furnace. These are heated by oxygen enriched, natural gas burners, designed to reduce emissions from the combustion process. Other chemicals flux is added as catalyst to aid the conversion reaction and help remove impurities from the resultant bullion. Our standard monitoring system ensure the process efficiency. After production of Lead block, the smelter department receive dross produced by the refining process, which contain valuable metals such as Copper, tin and Antimony. These are recovered by smelting the dross’s, producing lead alloys with high percentages of these metals. Lead blocks tapped from the furnace and the flux, which now resides as a slag, is also removed and is transferred to the refinery in molten form.
Refining
Lead blocks produced by the smelting process is transferred into a processing kettle. Each kettle is capable of holding 75-150 tonnes of molten lead and is heated via high efficiency natural gas burners. Emissions are controlled by dedicated extraction on each processing kettle. Pyrometallurgical refining is undertaken with the lead in molten form. The chemical concept behind the refining process is the addition of reagents at controlled temperatures to remove impurities in the form of dross.
Casting
Casting consists of pouring Pure melted Lead into a mould, where it solidified into the shape of the mould which is called Ingot, Lead is pumped by heated pipes from kettles to a casting reservoir, or casting wheel, which directs a measured amount of lead into steel or cast-iron moulds.