Title of Technology to be offered

Recovery of vanadium pentoxide from vanadium bearing sludges of alumina industry

Type of Technology

Indigenous

Area of Technology

1. Materials and Material Science, 2. Waste Management

Brief description/abstract (150 words)

The process is simple, low cost capital intensive and can easily be adopted in a small scale sector. In the first stage of the process, the sludge is dissolve in water and filtered, in the second stage the filtrate is acidified and then vanadium is precipitated out from the acidified solution. The process enables 90% of vanadium recovery with over 98% purity.

Major raw material

(a) Vanadium Sludge (average 10% V₂0₅), (b) Hydrochloric acid, (c) Ammonium chloride

Major Plant Equipment/Machinery

Leaching, precipitation and storage tanks, (b) Filter press, (c) Centrifuge filter, (d) Drier, (e) Muffle furnace, (f) Centrifugal pumps, (g) Acid pump etc. -  costing Rs. 30 Lakhs.

Area of application

Minerals, Metals and Materials

Details of specification application

For production of ferro-vanadium which is used in alloy steels and also as a catalyst to produce sulphuric acid.

Status of  Development

Process standardised at a scale of 2t/day sludge

Ecological/Environmental Impact  (if any, specify briefly)

Effluent generated during the process need to be treated before disposing off

Patenting details

Patent Filed

Extent of Commercialisation

Under the process of commercialisation. Process licensed to 4 parties and three are in commercial production

Technology Transferring Agent

NML/CSIR

Technology Transfer Assistance Offered (Optional)

(a) Process Know-How, (b) Details of the Equipment, (c) Plant lay-out & (d) Quality assurance methods. Assistance in setting up a plant on separate terms

Key words

Vanadium pentoxide, vanadium sludge

Additional Information (if any)

A battery limit plant with capacity to process 2 to 3 tonne of sludge/day in 3 shifts costs approximately Rs. 60 Lakhs

Country of origin

India