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Production lines in factories are producing not only the products but by products and wastes. Steel machining plants are
producing steel parts with steel chips and oxidized metal scale. Pipe production lines uses steel strips to produce steel
pipes. In pipe producing process, pipes are machined to cut welding bent, welded pipes are shot blasted with steel
granulates and oxidized metal scale is broken in shaping processes. All these production steps are producing oily
sludge of pipe production lines. Machining operation cooling and greasing oils causes sludge to be oily. This oily sludge
is considered to be a hazardous waste and sent to be treated in waste treatment centers. In this study oily sludge is
characterized in order to understand characteristics of oily sludge and develop possible recycle technologies.
International Iron & Steel Symposium
UDCS
Samet Ballı
Yeşiltepe Yeşiltepe
Mustafa Kelami Şeşen
Oily sludge is considered as waste in steel processing plants. Although it is treated as waste, it could be used as
raw material since high metal content. Mill scale on the other hand is used in integrated steel factories and is a
large source as raw material or recycled material. In this study, oily sludge of pipe production is mixed in
different ratios with mill scale and pelletizing behaviour is studied. Starting materials are characterized
for particle size, chemical composition and phase analysis. Produced pellets are controlled for free fall test,
moisture content and compressive strength. Reduction experiments are done in laboratory scale furnace
in order to evaluate reduction behaviour of pellets and effect of oily sludge content.
International Iron & Steel Symposium
UDCS
Samet Ballı
Selçuk Yeşiltepe
Mustafa Kelami Şeşen