Bindal Smelting Pvt. Ltd. Delhi

Pyrometallurgical process is adopted to extract RefinedPure Lead from Remelted Lead ingots Lead scrap. The Lead ingot generated from this refining process is of minimum 99.97% pure by weight but most offen the purity level of 99.98 % is atained. Our plant has three Refining Pots with a range of capacity between 25-35 MT.

Antimony which is alloyed with lead to make grid and spine is the fundament additive which has contributed to number of metallurgical properties such as (1) Increase of hardness and tensile strength (by precipitation age hardening system) (2) Higher melt fluidity (3) Superior castability (4) Higher stabilization of lead di oxide through ionic migration of SB3+ and SB5+ ion to negative plate.

Lead forms several nearly stoichiometric oxides with narrow phase limits, namely PbO, Pb3O4 and PbO2, as well as several compounds with oxygen having relatively larger phase limits. In commercial production by thermal method molten lead is directly oxidized by a mixture of air and water vapour. In the cupellation process in which a hearth is used or in kettles in the Barton Process both modifications Red Tetragonal PbO and Yellow Rhombic PbO form in varying proportions depending on temperature and cooling rate.