Refining Pot for Refining and Alloying
About Lead Refining
Lead recycled from used lead acid batteries or other sources (Secondary Smelting) via the Mini Blast Furnace or Rotary Furnace route, contains lot of contamination and undesired components. On the other hand, Lead required for battery manufacturing is either soft Lead with 99.97% purity or hard Lead of varying Antimony compositions.
Description of Melting Pot
The Melting Pot (or Refining Pot or Alloying Pot, as it is variously called), is a mechanical mixing device with a pot and a heating arrangement. The inner pot is made of heavy MS plate with dish end bottom. It is placed within a jacket of refractory bricks, which in turn, are protected by an outer cover of MS plate with reinforcements. The pot is covered at the top with opening for feeding lead ingots and is provided with an electro-mechanical mixer. At the bottom, a heating source, usually an oil fired burner, is provided to heat the pot and to melt the lead.
Once lead melts, impurities are skimmed and removed and any consumables required are added. Lead is then drained from the pot through an outlet pipe and valve.
Capacity of such pots depends upon the requirements of particular units. Standard pot capacities made are from 4.0 TpB to 20.0 TpB. Higher capacity pots are also manufactured as required by any particular establishment.
A typical 10.0 TpB Refining Pot has the following standard sizes and specifications:
- Diameter (ID) 1150mm
- Height 1250mm (Dish Depth of 200mm)
- Flange Width 350mm
- Outer Shell Diameter 1900mm
- Stirrer MoC Dia SS-304 75mm
- Stirrer Motor 5.0 HP x 960 RPM
- Outlet Valve Size 40mm
- Burner Diesel Fired
- Fuel Consumption Range 8-18kg ltr
Melting Processes have been grouped as
- Re-Melting Process
- Refining Process
- Alloying Process
Melting processes lead to generation of air pollution at the following stages
Initial heating and melting generates fumes
Drossing with sulphur, wooden powder and coke breeze generates lot of smoke and dust particles
Further heating for Refining and Alloying with different chemicals generates fumes and dust particles.
Hence, to meet various goals of maintaining employees' health, factory environments as well as regulatory requirements, it becomes imperative to get high end Air Pollution Control Systems to be installed with the Melting Pots.
Air Pollution Control Device for Refining Pot
- Dust : 500-600 mg/Nm
- Temperature : 60-80C G
- Gases : Fumes and Dust
- Dust : Less than 50 mg/Nm
- Lead ( Pb) : Less than 10 mg/Nm
- Temperature : 50-60 C
- Gases : Not Detectable