A Process for The Preparation of Galvanizing Flux Based on Triple Salts
Introduction
A considerable amount of zinc is wasted as dross during the galvanising of iron and iron based alloys. Pollution problems are also encountered due to the use of ZnCl2/ NH4 Cl. To avoid this problems, a flux based on triple salt is invented. Three steps of chemical synthesis is required to get the desired products 20-30% aqueous solution of flux is prepared and the fluxing of articles to be galvanised is performed for 30-60 seconds at room or slightly elevated temperature.
Major raw materials
ZnCl2 , NH4 Cl, two other chlorides, surfactants etc.
Major Plant Equipment/Machinery
Reaction vessel, boiler, filter press, centrifuge etc.
Area of Application
Minerals, Metals and Materials
Applications
Standardised at 1000 kg per day scale.
Status of Specific Development
Standardised at 1000 kg per day scale.
Ecological/Environmental Impact
General precaution of using chemicals in industries.
Patenting details
Patent filed
Technology Transfer Assistance Offered
Includes
- Process know-how
- Details of the equipment
- Plant lay-out
- Quality assurance methods. Assistance in setting up the plant and separate terms
Additional Information
A plant with a capacity of 600 TPA will cost Rs. 20 lakhs. R.O.I. is 25% at selling price of Rs. 30,000 per ton. Suitable for small scale industries.
For further information please contact :
Director
National Metallurgical Laboratory
Jamshedpur-831 007, India
Tel: (0)657-2271715, 2270092
Fax:(0)657-2270527
Email: director@nmlindia.org
