Dri Ash Plant

Leveraging
on our vast industry experience, we are manufacturing, exporting and
supplying a finest quality range of
Dri
Ash Plant.
The provided plant is precisely tested on different quality
parameters by our highly skilled quality inspectors to ensure its
flawless delivery at clients' end. This plant is used for the air
separation of solids and to separate the carbon bearing char from the
magnetic and non-magnetic oxide wastes. Our professionals manufacture
this plant by utilizing the optimum quality components and the
ultra-modern technology as per the international quality standards.
Besides, this Dri
Ash Plant
is offered at highly affordable rates to our clients.
Features:

High strength
Strong constructionLow maintenanceAnti-corrosive

SCOPE OF DRI ASH SEPARATION PLANT:
Sponge
Iron is iron ore reduced directly in solid state using coal gas,
natural gas or coal as reductants and is also known as Directly Reduced
Iron(DRI). The need for development and commercialization of sponge iron
manufacturing process arose in late 50's when Electric Arc Furnaces
(EAFs) engaged in manufacturing steel started facing problems of
availability of scrap of desired quality, the traditional source of
their iron metallics. The DRI process soon become popular and since the
inception of first DRI plant in 1957 in Mexico, there has been
continuous growth of this industry in last three decades. This is
evident from the steep rise in world DRI production during the past
three decades. India entered the sponge Iron industry only in 1980, when
the coal based DRI plant of Sponge Iron India Limited (SIIL) was
commissioned at Kothagudem, in Andhra Pradesh.
PRINCIPLE OF WORKING:
Every
sponge Iron plant using coal as reductant in a rotary kiln creates a
waste, which basically consists of coal char and other inorganic oxides.
This
waste char, which is also sometimes called DRI ash, necessarily must
have a minimum quantity of carbon in it in order to prevent re-oxidation
of the freshly produced sponge iron at the discharge end of the rotary
kiln. The carbon serves to maintain a reducing atmosphere till the end
of the process.
The
waste is separated from the product DRI using magnetic separation. The
DRI is the saleable product and the ash/char is a waste product. In some
plants, this waste is sold to local brick kilns for use in firing
bricks (but only in the dry season).
Forsberg Agritech builds
machines for air separation of solids and one such machine can be used
to separate the carbon bearing char from the magnetic and non-magnetic
oxide wastes.
The
carbon bearing char has a fixed carbon content of between 40 and 50%
and has useful fuel value. This can be gainfully employed in all
boilers, which accept such fuel, such as fluidized bed boilers. It pays
therefore to separate the char and utilize the fuel. (The waste could be
used directly but will have lower calorific value and will make the
fluidized bed heavy which can have adverse effect on the life of the
pressure parts inside the fluidized bed boiler.) It also pays from the
ecological point of view in that wastes are converted into useful fuel.
The
separation is based on density and size differences and the separation
is very easily accomplished with very few moving parts. This makes the
system very cost effective.
The
separated fuel can be used in the fluidized bed boiler replacing bought
out fresh coal. This should lead to effective cost savings.
As
the plant is not compatible with wet ash it is proposed that wetting in
pug mill be eliminated and the dry material be fed to our plant through
closed conveying system e.g. screw conveyor with an automatic bag
filter system.
ADVANTAGES:
The
calorific value of the segregated product will be significantly higher
than that of the total DRI ASH, - which is being currently used. The
recovered high calorific carbon will greatly reduce fuel requirement.When
the Ash content goes down and percentage of FC that goes in the boiler
increases the wear and tear of all your combustion equipment will go
down. One will be the best judge to estimate the saving that one may be
able to achieve due to lower wear and tear of the equipment due to lower
ash content.A
related saving will be the lower periodicity of the maintenance cycle
due to lower ash content. Again it will vary from z place to place. One
will immensely gain in down time. Shut downs are very expensive.Even
if 42 to 50 % available FC is collected and gainfully employed in all
Boilers, it pays to separate the Char and use the fuel. In the bargain
this reduces the disposable Ash and increase the calorific value of the
fuel in the Boiler.The
waste, when used directly (as is being done presently) with less
calorific value makes the fluidized bed heavy which can have adverse
effect on the life of pressure parts inside the fluidized bed boiler.It pays from the ecological point of view in that wastes are converted in to useful fuel.When
there is less ash % going in to the boiler, the size of the boiler
required reduces and your total cost of boiler will comedown or
production and productivity of existing boiler will increase.To our estimate the payback period of such technology is very low.