Waste Utilization

Red Mud

• Fiber-reinforced polymer composition (door and window panels, tiles and sheets etc.) successfully developed
• Soil conditioners/fertilizers synthesized in lab scale
• Ferrite cement developed in lab scale

Fly Ash

Ash Utilisation

Captive Power Plant (CPP), NALCO, Angul has been making continuous efforts to increase fly ash Utilisation in an environment friendly manner through various methods.
Fly ash generated in the CPP is used for various activities like manufacturing of bricks, use in cement industry, asbestos manufacturing, agriculture, concreting work, road construction work, development of abandoned stone quarries/low lying areas etc. Fly ash is supplied to manufacturers of fly ash brick and ash based products free of cost.

As part of its long term planning CPP has adopted eco-friendly manner of ash disposal to allotted mine void of South Bharatpur after commissioning of most coveted Lean Slurry Project (LSP) for filling of abandoned coal mines of Bharatpur (South) of MCL, Talcher .
Major portion of the ash generated from boilers of Units #1-6 is transported to Mines void at Bharatpur, Talcher in lean slurry mode. Ash generated from #7-10 is collected in dry mode and stored in silos. A portion from this ash is supplied to external agencies for ash utilization. The rest is converted to lean slurry and transported to Mines void at Bharatpur, Talcher. In case of exigency Ash pond-I is used as for temporary storage .

The ash pond is designed with three-pond system. Pond-3 carries the decanted water from pond 1 (part-A & part-B) to Ash water recycling unit. In the Ash Water recycling unit water is clarified further and pumped back to the ash water fore-bay for reuse. 100% of overflow water of ash pond is recycled back for reuse. Only seepage and evaporation loss of water is being put in to the ash water fore-bay as ash water make up.
Ash is transported to mines void with Ash to Water ratio at 1:9 by 8 headers through On-line booster pump house (OBPH) located inside plant premises and then through 4 headers from Intermediate pump house (IPH) located at Karnapur, Talcher. The return water from mines void is carried back to IPH for clarifloculation and then brought back to CPP by a single header for further use.
CPP, NALCO is still continuing fly ash subsidy scheme for all fly ash Brick manufacturers in Odisha that is providing subsidy of Rs. 150/- per MT of fly ash to brick manufacturers.

Interested parties are requested to contact ASH MANAGEMENT DEPARTMENT of CPP for details of the scheme.
Nalco has tied up with IIT, Kharagpur & IMMT, Bhubaneswar for development of new segments like development of tile & extraction of Alumina having long term potential of Ash Utilization. All of these activities will enable NALCO to achieve 100% ash utilization in not too distant a future.

Nalco has tied up with IIT, Kharagpur & IMMT, Bhubaneswar for development of new segments like development of tile & extraction of Alumina having long term potential of Ash Utilization. All of these activities will enable NALCO to achieve 100% ash utilization in not too distant a future.

Nalco has tied up with IIT, Kharagpur & IMMT, Bhubaneswar for development of new segments like development of tile & extraction of Alumina having long term potential of Ash Utilization. All of these activities will enable NALCO to achieve 100% ash utilization in not too distant a future.

NALCO also has an incentive scheme to give Rs. 130/M3 of ash lifted from ash pond to be used within radius of 7km andRs.150/ M3 for use beyond 7km. CPP, NALCO. This scheme can be used for road construction and other uses as approved by statutory authorities.

Ash Management

NALCO always manages the ash disposal in a environmental friendly manner. In line with this CPP, NALCO has installed High Concentration Slurry Discharge system in its expansion project and have constructed a new ash pond (Ash Pond-IV) for discharging ash in HCSD mode.