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Red Lead
Gravita India Ltd. is a leading red lead manufacturer with a technologically advanced facility for efficient production and global supply of red lead powder. Red lead, known for its bright red to orange-red appearance, is used in various industries, including lead glass and red pigments. Notably, it safeguards iron and steel from rusting as paint. Chemically, red lead is lead tetroxide (Pb3O4), prepared by oxidising metallic lead or litharge (lead monoxide).
Red lead primer is one of the oldest and most commonly used anti-corrosion pigments. It has been historically used on bridges and steel structures for protection. Its remarkable resistance to saltwater makes it ideal for ship hulls and decks.
While virtually insoluble in water and alcohol, red lead dissolves in stomach acid, making it toxic when ingested. It can be dissolved in hydrochloric acid, glacial acetic acid, and diluted nitric acid with hydrogen peroxide.
Uses of Red Lead
- Ceramics
- Lead acid batteries
- Pigments
- Lead glass
- Fluorescent tubes
- Heat proof glasses
- Optical glasses
- Explosives
In our red lead manufacturing plant, we begin with a Barton plant to produce massicot. The necessary input is refined lead ingots with a minimum purity of 99.97%. The Barton plant output then moves to the red lead furnace, where it is accompanied by various equipment, including a dust collection plant, conveyors, grinder, cyclone-bag-house filtration unit arrangements, and finally, it is packed and stored.
Red Lead Typical Specifications:
|
ATTRIBUTE |
RED LEAD |
||
|
JOINTING GRADE |
SETTING GRADE |
NON-SETTING GRADE |
|
|
Colour |
Orange Red to Brick Red |
Orange Red to Brick Red |
Brilliant Orange Red to Brick Red |
|
Crystal Structure |
Spinal Structure |
Spinal Structure |
Spinal Structure |
|
Thermal Stability |
500 ° C |
500 ° C |
500 ° C |
|
Specific Gravity |
9.1 |
9.1 |
9.1 |
|
Retention on 240 mesh IS Sieve(63 micron) (max %) |
0.25 |
0.15 |
0.15 |
|
Apparent Density (Scott) gm/cc |
1.6 to 1.8 |
1.3 to 1.6 |
1.2 to 1.3 |
|
Matter soluble in water (in %) |
0.3 |
0.3 |
0.3 |
|
Water Absorption mg/gm |
90 to 100 |
90 to 110 |
100 to 110 |
|
Acid Absorption mg/gm |
160 to 170 |
150 to 160 |
130 to 150 |
|
Volatile Matter at 105°C (in %) |
0.2 |
0.2 |
0.2 |
|
Oil Absorption % |
6-7 |
6-7 |
6-7 |
|
Free Lead (% Max) |
Traces |
Traces |
Traces |
|
PbO2 (in %) |
15.1 to 25.1 |
25.2 to 33.2 |
33.3 and above |
|
Pb3O4 |
43.0 to 72.0 |
72.1 to 95.0 |
95.1 and above |
|
Total Lead Oxide |
99.5 |
99.5 |
99.5 |
|
Uses |
Boiler & Water Pipeline |
Lead Acid Batteries |
Surface coating |
|
Moisture Content (% Max) |
0.05 |
0.05 |
0.05 |
|
Purity (% Min) |
99.97 |
99.97 |
99.97 |
