Scrap
Batteries arriving in Benoni for Recycling |
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Smelter
in Benoni |
Effluent
Plant in Benoni |
BATTERY CENTRE AND FIRST NATIONAL BATTERY:
DOING OUR BIT
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Care
of the environment has become extremely important in modern times.
Automotive battery components, which include lead, plastic and
acid are harmful to our ecology if they are not properly treated.
Fortunately, most of the components of these batteries are well
suited to recycling.
The company that manufactures Raylite batteries for Battery Centre -
First National Battery - established a recycling facility in Benoni some
years ago to help save the environment, prevent waste and to control
the quality of lead being used. This facility includes a lead smelter,
a battery breaker, effluent plant that treats the acid and scrubbers
to control environmental emissions.
Particularly in recent years, a large number of batteries have been imported
with no plan to recycle them when their life is over. As a responsible
local manufacturer First National Battery actively looks for any scrap
lead acid batteries (not just their own) to recycle - thus demonstrating
their commitment to sound ecological management.
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Recycling
has become an extremely important consideration in modern
business not only from the recovery of valuable materials
but also from an ecological and environmental protection
aspect. |
An
area of concern in South Africa relates to the importation
of lead acid batteries. In general, importers do not have
the same need to recycle their products as do local manufacturers
and thus no apparent necessity for them to ensure the
return of redundant batteries. Local producers are therefore
much more environmentally friendly. We ensure that
so-called scrap batteries are recycled thus displaying
our social investment in the future of sound ecological management. |
Scrap
batteries are processed to the point where the polypropylene
components are returned for cleaning, granulating and
eventual re-processing. the scrap lead plates, terminals and
separators are stockpiled for refining. All electrolyte,
which by the time the battery is scrapped, has a low relative density
- in fact almost 1.000 - is collected and neutralised before
being processed in our effluent plant. The flocculants
are disposed of in cake form and dumped in a Class 1
dump whilst the clean water is disposed of into
the municipal waste system. |
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of the major benefits of having ones own smelter include: |
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More
control over quality.
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Continuity
of supply.
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Relatively
high recovery rate of lead from scrap.
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Able
to re-process dross and filtered materials.
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Active
contribution to positive ecological benefits.
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All
these factors are well and good but the lead industry, more
than any other, has been subject to adverse publicity regarding
environmental problems and legislative pressures to solve them.
Anti-pollution controls have been implemented sometimes at
a very high cost. Several sets of legislation are in force
including Atmospheric Pollution Prevention Act, Occupational
Safety and Health Act and the Water Act. Further, as the manufacturer
of batteries involves lead we are required to be registered
in terms of the manufacturing process and hold all the necessary
permits. |
Our
investment in a smelter has therefore blended well with our
commitment to the recycling of batteries. This in only a part
of our long term capital expansion programme which, to date,
has seen an improvement in production control, product quality
and increased production capabilities. Further investments
are planned for the next few years which will enable us to
position ourselves to take advantage of the growth in the South
African economy. |
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LEAD ACID BATTERIES AND ENVIRONMENTAL REGULATIONS
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To
keep microscopic particles of airborne lead emissions to
a minimum, manufacturers and recyclers use high efficiency
air filters and wet scrubber to filter plant air before it
is released to the atmosphere. The filters are inspected
and replaced regularly. The filters also are equipped with
alarms, and the process is shut down or re-routed should
a filter tear or break. |
Manufacturers
and recyclers capture and treat process water to keep lead
out of streams and rivers. The water is tested before it is
released to be certain it meets clean water standards. |
At
recycling plants, air monitors are installed at the perimeter
of each property to make sure any lead in the air is below
the allowable limit. The limit is 1.5 micrograms of lead per
cubic meter of air, averaged on a quarterly basis. Plants
have a regular program of exterior vacuming or washing down
paved areas and capturing and treating rainwater runoff. Vehicles
that transport lead products typically are hosed down before
leaving a facility so that any dust on tyres or vehicle body
is not carried to public roads. |
When
taken together, all of these practices add up to a very responsible
effort on the part of lead acid battery manufacturers and recyclers
to keep even small amounts of lead out of the environment.
These efforts make a measurable difference. |
Lead
acid batteries are the environmental success story of our time.
Roughly 93% of all battery lead is recycled. Comparted to 42%
of newspapers, 55% of aluminium soft drink and beer cans, and
40% of plastic soft drink bottles, lead acid batteries top
the list of the most highly recycled consumer products. |
The
first process in recycling is the "breaking-up" of
plastic and lead in old/used batteries. The lead grids, lead
oxide and other lead parts are cleaned and melted together
in smelting furnaces. The molten lead is poured into ingot
moulds. Large ingots weighing about 1 ton are called hogs.
Smaller ingots weighing 25kg are called pigs. After a few
minutes the impurities otherwise known as dross, float to
the top of
the still molten lead in the ingot moulds. The dross is scraped
away and the ingots are left to cool. |
When
the ingots are cool, they are removed from the moulds and sent
to battery manufacturers, where they are re-melted and used
in the production of new lead plates and other parts for new
batteries.
Old battery acid can be handled in two ways:
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The
acid is neutralised with an industrial compound similar
to household baking soda. This turns the acid into
water. The water is treated, cleaned and tested to
be sure it meets clean water standards. Then it is
released into the public sewer system.
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Another
way to treat acid is to process it and convert it to
calcium sulphate, an odourless white powder which is
then dumped. |
During the battery breaking process the container and lid are boken
up into small pieces which are also recycled and when mixed with
a small proportion of virgin material new plastic feed stock is produced
and the cycle continues! |
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THE RECYCLING PROCESS
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Batteries
collected through Battery Centres and from other sources are transported
to the smelter in Benoni where they are processed through a battery
breaker, which separates the lead, plastic and acid.
From here the acid, which has lost much of its acidity by this time,
is neutralised and processed through the effluent plant; then disposed
of according to environmental regulations.
The plastic components are washed and converted into pellets to be re-used
in the manufacture of new battery containers and covers at the First
National Battery plastics factory at Fort Jackson.
The battery plates, terminals and other lead extracted by the battery
breaker are stockpiled for refining and blending with other materials
to produce the precise lead alloys required for modern battery performance.
These lead ingots are then used in the manufacture of new batteries -
completing one lead cycle, and beginning another to be completed many
years later.
SEE
THE GRAPHIC REPRESENTATION OF THIS CYCLE ABOVE
Each step of the process is conducted in accordance with environmental
standards and the small proportion of the battery which cannot be reclaimed,
is disposed of in cake form in a Class A dump.
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