The plant is composed of the following systems: production, storage and full automatic transport system equipped with scaling device.
A loading conveyer transports the lead ingots (in the range of 20kg to 40 kg) directly into the melting pot controlled by a level system. The melted lead is then conveyed, through a lead pump, into the machine cylinders.
The cylinders (ranging from 50gr to 60 gr each) are transported though a bucket elevator into a storage silo of 30 ton capacity.
From the lower part of the silo, the cylinders are transported by a vibrating system to the entrance of the mill.
The feeding of the mill is automatically controlled by an electronic scaling system; the running of the mill is continuous and has a temperature control system with and air-water cooling system.
The oxide powder is pneumatically dragged by an exhaust fan through:
- Cyclone (whirlpool)
- Negative pressure cleaning filter on hose
Cooled oxide is extracted through rotative valve, screw conveyer and transported by a bucket elevator to the storage silo of 40 tons capacity.
The air circuit is protected by the absolute filters (99.99%). In case of any problem with the unit a sensor control system stops immediately the work by means of an acoustic transponder assuming total protection to the environment. The storage and transport system providing a negative pressure, thus resulting a minimum oxide dust into the environment.
From the storage silos the oxide can be conveyed in a batching hopper sand subsequently dosed into the mixer. COSMEC products are custom made, therefore engineered to a custom plant requirements, needs and specifications.
Electrical power: 220V/380V 3-phase 50Hz 45kW
Cooling water: 800 l/h
Compressed air: 6 atm
Production: 8 ton or 14t 24h
Oxidation: Lead oxide 65%-70% (free lead 30%-35%) ± 2%*
*depending on environmental conditions
Mean grain size: 2 ±0.15 µm
Acid absorption: 240 ±40 mg/gPbO