Chemicals
Based Technologies - Sodium Silicate Plant
An Indian consultancy company offers
to supply sodium silicate plant on turnkey basis. The
conventional process of manufacturing sodium silicate
is by the reaction of silica sand with soda ash at about
1,100oC forming water glass, which is crushed &
dissolved in water and digested under pressure with
steam.
The process offered by the company involves reaction
of silica present in rice husk ash and caustic soda
in an autoclave under pressure with steam. Rice husk
contains appreciable quantity of silica and on burning
the husk contains appreciable quantity of silica and
on burning the husk for raising steam in the boiler,
the ash obtained is mostly silica in highly reactive
form. The solution of sodium silicate so formed on pressure
digestion is filtered from the unreacted, unburnt carbon
particles originally present in the ash and finally
concentrated in an evaporator.
Equipment Required :
The list of main equipment required
for production silicated are as follows: vibrating screen
(1 number), digestor (2 number), filter press- plate
and frame type (1 number), evaporator (2 number), condensers
(2 number), boiler (1 number), transfer pump with softener
(1 number), cooling tower with ID fan (1 number), NaOH
solution preparation tank (1 number), NaOH solution
measuring tank (1 number), filter feed tank (1 number),
bleacher feed tank (1 number), soft water storage tank
(1 number), chimney for boiler (1 number), interconnecting
pipelines for steam and process fluids (1 number), technological
structure (1 set)
Areas of Application:
In Chemical industry. It is used in soaps, detergents,
adhesives silica gel, etc
Inputs Required:
Raw materials
- Caustic soda flakes: 215 kgs/ton of sodium silicate
- Rice husk: 1,675 kgs/ton of sodium silicate
- Rice husk ash: 135 kgs/ton of sodium silicate
- Chlorine gas: 3.5 kgs/ton of sodium silicate
Water: 2.5 cubic meters per ton
of sodium silicate
Electricity: 25 HP connected load
Manpower: 8 nos per shift
Production capacity
: 1,500 MT per annum based on 2 shift/day operation.
Economic Data: Cost of
project (excluding land, shed & building): Rs 7
million (US $ 0.145 million approximately).
Forms of Transfer
: Turnkey plant
For more information,
contact:
Asian & Pacific Centre for Transfer of Technology
P O Box: 4575, Qutab Institute Area
New Delhi 110016
Tel: (011) 26856276 Fax: 26856274
Email: rvijh@apctt.org
