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Sulphuric acid, copper slag, phospho-gypsum
and hydrofluosilicic acid are by-products
of Hindalco's production processes. The company
is in the process of setting up an aluminium
fluoride manufacturing facility using its
by-product hydrofluosilicic acid.
Sulphuric acid
Birla Copper produces sulphuric acid (also
known as oil of vitriol and dipping acid)
of IS 266/1993 technical grade. It has great
affinity for water, making it a strong dehydrating
agent and therefore a valuable electrolyte
and strong oxidising agent.
Three sulphuric acid plants, with a total
capacity of 16,70,000 tpa, have been installed.
They use the DCDA process and were designed
by Monsanto Envirochem (USA). The off-gases
from the smelting furnace and from the PS
converter, which contains sulphur dioxide
(SO2), are delivered to the gas cleaning section,
which comprises two stages of reverse jet
scrubbers. The cleaned gases from the final
reverse jet scrubber are fed into two-stage
electrostatic precipitators to eliminate mist
and residual dust particles from the gases.
The sulphur dioxide-rich gases are further
processed and converted into sulphuric acid
of commercially acceptable quality. Substantial
storage capacity and a 3.5-km-long pipeline
feed sulphuric acid into the vessel directly
from the storage tank.
Logistics and transportation of sulphuric
acid
Transportation is carried out by customer's
trucks. A pipeline to the company jetty for
sulphuric acid shipment is also available.
Send
a query
Phosphoric
acid
The phosphoric acid plant is based on the
Prayon Mark IV dihydrate technology provided
by SNC Lavalin (Belgium). The plant is designed
to treat 285,000 tonnes of sulphuric acid
and 300,000 tonnes of rock phosphates to
produce 180,000 tonnes of merchant-grade
phosphoric acid (52 to 54 per cent) each
year. The plant also has a fluorine recovery
section, which produces about 5,100 tonnes
of hydrofluosilicic acid (18 per cent) per
year.
Phospho gypsum
(CaSO4.2H2O)
| Source |
Phosphoric acid plant |
| Physical properties |
Powder form |
| Sieve
analysis |
| BSS Mesh |
(% passing) |
| 72 (211 micron) |
96 |
| 170 (89 micron) |
64.3 |
|
| Chemical
analysis |
(On a dry-weight
basis)
CaSO4 |
92–95 |
|
| Uses |
Cement manufacturing, bricks manufacturing,
gypsum board, plaster of paris (POP),
filler for fertilisers |
Send
a query
Copper slag (iron
silicate)
| Source |
Produced
during smelting of copper |
| Physical
properties |
Granulated,
black in colour |
| Hardness |
6 to
7 Mohs scale |
| Specific
gravity |
3.51 |
| Bulk
density |
1.87
(Kg/l) |
| Electrical
conductivity |
2 (mS/m)
|
| Sieve
analysis |
| Sieve size (mm) |
Range (%) |
| 4.00 to +3.00 |
2 to 4 |
| 3 to + 2.36 |
3 to 12 |
| 2.36 to +1 |
40 to 55 |
| 1 to +0.5 |
15 to 30 |
| 0.5 to + 0.212 |
6 to 12 |
| 0.212 below |
0.2 to 1.0 |
|
| Uses |
Shot
blasting as abrasives, sub base and
land filling for roads |
Send
a query
Contact
information  |
Commercial
division
Dahej/Lakhigam
- 392 130
Tal: Vagara
Dist: Bharuch (Gujarat)
Tel: 91-2641-256004/5/6/9
Fax: 91-2641- 256002/3
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For
phospho gypsum
Mr. Narendra S Shekhawat (GM - Marketing)
Dahej/Lakhigam
- 392 130
Tal: Vagara
Dist: Bharuch (Gujarat)
Tel: 91-2641-256004/5/6/9
Fax: 91-2641- 256002/3 |
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