Power Station II

Fertilizer plant

B & C Plant

Lignite Reserves

R&D in NLC

Environmental Care

Neyveli Home



Neyveli, home of the Neyveli Lignite Corporation, is India’s energy-bridge to the 21st century and a fulfillment of Pandit Nehru’s vision. Incidentally, Nehru and NLC share a common birthday (14.11.1956). Nehru launched the mining operations with his golden touch in May 1957. Ever since, there has been no looking back. NLC has achieved the objectives it has set for itself, fulfilling its corporate mission to be the leader in the industry. Comprising of two open cast mines, two Pithead Thermal Power stations, Briquetting & carbonization plant and a fertilizer plant, NLC’s growth is sustained and its contribution to India’s social and economic development is significant.


Demarcated over an area of 16.69sq.kms., with a reserve of about 287 million tonnes, Mine-I is situated on the northern part of the field adjacent to the Neyveli township. The lignite seam was first exposed in august 1961 and regular lignite mining was commenced in May 1962. Its production (6.5 million tonnes of lignite per annum) feeds thermal power station-I, briquetting & carbonization plant and the process steam plant.

While the overburden thickness varies from 70 to 95m., the lignite thickness is 10 to 23m. German excavation technology in open cast mining, using bucket wheel excavators, conveyors and spreaders was used in this mine for the first time in the country. A huge reservoir of ground water exists below the entire lignite bed, exerting an upward pressure of 6 to 8 kg/, which is tackled by an effective ground water management system.



Mine-II is located 5kms South of mine-I spread over an area of 26sq.kms., with 398 million tonnes reserve. The lignite seam was first exposed in September 1984 and regular lignite mining commenced in March 1985. The maximum overburden is 103m and the lignite thickness varies from 8 to 22m. Initially, the mine was started with a production capacity of 4.7 million tonnes and in February’83 the capacity was enhanced to 10.5 million tonnes per annum. The lignite production in this mine meets the fuel requirement of thermal power station-II. The method of mining and equipment used are similar to that of mine-I.


Thermal power station-I

An epitome of indo-soviet collaboration, Neyveli thermal power station-I (TPS-I) was commissioned with one unit of 50mw in may 1962. Presently, this power station has six units of 50 mw each and three units of 100 mw each.

The unique features of this power station:

  • First lignite-fired thermal power station in south east Asia.
  • First pit head thermal power station in India
  • First largest thermal power station in south India.
  • Continuously achieving over 70% plant load factor, from 1982-83 to 1991-92 against the national average of around 50% and has continuously bagged the meritorious productivity award instituted by the department of power, government of India.

The power generated from this thermal power station is fed to the grid of TamilNadu electricity board, the sole beneficiary.


Thermal power station-II

Thermal power station-II (TPS-II) has been a major source of power to all southern states of India. The 1470 mw capacity power station consists of 7 units of 210 mw each. The first unit was synchronized in March 1986. The second unit of this power station was formally commissioned by the then prime minister shri. Rajiv Gandhi. This power station has seen a series of technological innovations such as:

  • Largest lignite-fired thermal power station in India
  • First and tallest tower type boiler in the country (92.7m. height)
  • First software based burner management system
  • First hydrogen/hydrogen-cooled generator of this size.
  • First boiler to be cleaned by hydrofluoric acid 


Fertilizer Plant

13.7 Fertilizer Plant with an installed capacity of 1.52 lakh tonnes of Urea per annum was commissioned in 1966. The equipment of the Fertilizer Plant were supplied by M/s. PINTSCH PAMAG, M/s. Linde of West Germany and M/s. Ansaldo of Italy. Initially the plant used raw lignite as feedstock. However, due to certain operational and technological constraints, the plant was switched over to Low Sulphur Heavy Stock/Furnace Oil as feedstock since July 1979.


Briquettting and Carbonization Plant

13.8 Briquetting and Carbonization Plant was commissioned in 1966 with an installed capacity of 3.27 LT of Carbonized briquettes (Leco) per annum. The equipment were supplied by consortium of West German firms. The achievable capacity has been subsequently assessed as 2,62,000 Tonne of Coke per annum. Coke is used in Electro chemical, Electro metallurgical industries as a reductant and in tea sector as a versatile fuel for drying and also as substitute for coal, in cement and paper industries. In the process of low temperature carbonization adopted in the plant base chemicals vital to the chemical industries viz. Carbolic acid, Orthocresol, Metaparacresol, Xylenol, Multivalent phenol and neutral oil are also produced.

The plant is under temporary suspension since 5th April 2001 owing to inadequate
market demand. The plant is about to be relinquished by NLC.