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E-COURSE
ON
VULNERABILITY ATLAS
OF INDIA
  From the Desk of Executive Director

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  New Initiatives : Emerging Technologies
 
E-Learning Modules on the Technologies of LHPs for TECHNOGRAHIs Passive-design Response in Increasing Thermal comfort with Viable solutions (PRiTHVi) – Climate Smart Buildings Thermal Properties of Building Materials and Construction Technologies New...Release of Publication on the occasion of World Habitat Day 2024
 

 

 

Sources of Phosphogypsum

 Phosphogypsum is generated as a by-product of the phosphoric acid based fertiliser industry. The interaction of ground phosphate rock with sulphuric acid produces 10-40% free moisture along with phosphogypsym. 4.5 million tonnes is generated per year in India. Over 10 million tonnes has accumulated at plant sites.

 

Nature of Pollution

The fluoride content of phosphogypsum causes land and water pollution.

 

Recycling of Phosphogypsum

This pollutant by-product from the fertiliser industry can be used to make several building materials:

 

 

Ø  Gypsum plaster, boards, tiles.

Ø  As set controller in the manufacture of Portland cement.

Ø  Non-shrinking cement, super sulphated/anhydride cement.

Ø  As a hydraulic binder.

Ø  As mineraliser.

Ø  Simultaneous manufacture of cement and sulphuric acid.

Ø  Artificial marble, fibre boards.

 

 

 

 
 
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