Basic oxygen furnaces (BOF) slag is the main problem at all iron and steel
factories. About more than 6 million tons/year of BOF slag has been
accumulated from the waste stockyards in Turkey. Dumps slags can be
revaluated by a processing technology which makes it possible to obtain
products that meet the requirements of sintering and blast furnace
production. The slags with particle size of -10 mm were enriched by the
magnetic separator resulting and increase in Fe grade from 18% to 33%. The
use of BOF slag in sinter blend provided additional Mn, CaO, MgO and
introduced a good solution to environmental problems.
The technological developments affect mining sector directly since the machineries and equipment used in this sector changes along with constantly developing technology. So, the risks of occupational accidents and occupational diseases are quite high in this sector. It is necessary to focus on occupational health and safety in the mining sector regarding the machineries and equipment used. This study was carried out in an open pit mine of boron minerals with class of very dangerous in the scope of occupational health and safety. The workplace on scope is evaluated in terms of the health and safety risks of employees. In this context, one of the major types of risk is dust, originated from machineries and equipment. The stages of open pit operation, crushing, screening, grinding and bagging are evaluated regarding dust formation and control. Risks that may arise due to the use of equipment and preventative measures have been determined. Such studies impose great affect in the development of occupational health and safety with the developing mining sector and prevention of accidents that may occur.
Original scientific paper An iron ore processing plant in Sivas (Turkey) was investigated and simulated depending on real and experimental data in this study. The AggFlow™ simulation packaged program was used and the experimental results conducted in mineral processing laboratories of Dokuz Eylül University were applied to the simulation when necessary. The results gathered by AggFlow were crosschecked with experimental and real data. The former plant design observations, experimental results and simulation software were combined to present an optimum plant design by calculating the final concentrate outputs. Hence, the simulation not only helped in machinery and equipment selection, but also put forth some economic aspects before the assembly of the plant. The importance of simulation was revealed since the company owners would be aware of the amount of capital investment, production costs, and the machinery to be ordered and most importantly, the amount of concentrate to be produced with different alternatives and applications.
Keywords: flowsheet assessment; iron; mineral processing plant; simulationProcjena dijagrama toka procesa i evaluacija kapaciteta pogona za obradu željezne rudače simulacijom Izvorni znanstveni članak Ispitivao se i simulirao pogon za obradu željezne rudače u Sivasu (Turska) na temelju stvarnih i eksperimentalnih rezultata. Primijenjen je AggFlow™ simulacijski program, a prema potrebi koristili su se eksperimentalni rezultati dobiveni u laboratorijima za obradu metala Dokuz Eylül Univerziteta. Rezultati dobiveni AggFlow™ programom usporedili su se s eksperimentalnim i stvarnim podacima. Kombinirali su se postojeći podaci pogona, eksperimentalni rezultati i oni dobiveni simulacijskim programom kako bi se dobio optimalni projekt pogona s proračunom konačnih rezultata. Simulacija nije pomogla samo kod odabira strojeva i opreme već je istaknula neke ekonomske aspekte prije montiranja pogona. Pokazala se važnost simulacije jer bi tako vlasnici kompanije postali svjesni količine ulaganja kapitala, proizvodnih troškova i potrebnih strojeva, a što je najvažnije, količine koncentrata koja se može proizvesti raznim alternativama i primjenama.
Abstract:In this study, the optimum feed composition in autogenous tumbling of basalt waste-rock particles to clean their weathered surface was determined. The weathered surfaces of basalt are generally cut out consequent to extraction of basalt columns in quarry operations. The inefficiently cut out portions of basalt cause formation of huge quarry waste dumps causing visual pollution on roadsides. Mixtures of different particle size fractions of basalt waste-rock particles were experimented to achieve the optimum feed material composition. The minimum loss of commercially available basalt particles and maximum clear surface was intended. The results were compared with respect to weight loss (%) and reflectance values of used and generated samples.
Kütahya'nın Oysu köyü yakınlarında hâlihazırda faaliyetini sürdüren bir flotasyon tesisinin flotasyon parametreleri iyileştirilmeye çalışmaları kapsamında tesiste kullanılan toplayıcı, bastırıcı ve köpürtücü miktarları ile diğer flotasyon parametrelerinden olan ortam pH seviyesi ve tane boyut büyüklüğü laboratuvar ortamında test edilmiştir. Tesiste kullanılan flotasyon reaktiflerine ek olarak, bir firma tarafından grafit cevherleri için geliştirilmiş farklı flotasyon reaktiflerinin de Kütahya Oysu grafit cevheri için uygunluğu test edilmiştir. Uygun reaktif tiplerinin ve miktarlarının belirlenmesi ile optimum flotasyon deney koşulları tespit edilerek, bu koşullarda elde edilen karbon tenör ve verimleri kıyaslanmıştı. Kimyasal tasarrufu ile tenör ve verimdeki artışlar birlikte değerlendirilerek yeni bir reçete yaratılmıştır.
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