Lead Sub Oxide

Lead sub-oxide (2pbo.Pb), also commercially known as grey oxide / battery oxide is used on an extensive scale for preparation of plates in lead acid batteries which requires production to strict specifications. Grey oxide produced in ball mill plant, which comprises of a small lead melting furnace, operating in line with a hemispherical/cylindrical ball-casting machine, which feeds the balls to the ball mill. In the ball mill, lead is converted to lead sub-oxide, which is an exothermic process. The free lead content is 25-35%.

LEAD SUB-OXIDE

Range of Lead Sub-Oxide : - 

SL. No.	Test Item	Test Report	As Per ISI Limit
1.	Free Metallic Lead	26 - 30%	(20 - 40%)
2.	PbO	(70 - 72%)
3.	Water Absorption	120 mg / gm+2	(90-150 mg/gm)
4.	Acid Absorption	220 mg/gm+2	(170 mg/gm Min)
5.	Residue on 63 Micron (240 mesh)  Sieve	1.70% + 2	(10% Max)
6.	Apparent (Scott) Density	1.20 gm/ml	(1.2 to 1.3 gm/ml)
7.	Impurities in Lead Sub Oxide	Iron :0.001% Antimony: 0.0006% Arsenic : Not detectable Copper  : 0.001%	0.0025 Max 0.001% Max 0.0001% Max 0.002% Max