Tez özetleri Astronomi ve Uzay Bilimleri Anabilim Dalı

Investıgatıon Of Applıcabılıty Of Novel Methods For Coal Flotatıon

In this study, applicability of novel methods were investigated for coal flotation.Firstly, coal samples were floated by use of classical methods. Then, ultrasonic bath was used before coal flotation.Besides, microwave energy was used as a pre-treatment method prior to coal flotation.Several different types of coal samples were experimented during coal preparation and flotation studies.Coal samples were provided from currently coal producing areas in Turkey, such as hard coal samples from Zonguldak-Armutcuk and lignite samples from Mugla-Yatagan and Kahramanmaras-Afsin Elbistan regions.

Coal samples were prepared for complete chemical analysis after coal preparation and classification tests samples were floated for using classical batch and release analysis methods. Ash content of batch flotation products, release analysis flotation products and release analysis flotation products with pre-treatment were calculated after analysing. Optimum collector amount and type were found for using batch flotation experiment data.. Release analysis flotation tests were matched with batch flotation tests in terms of combustible recoveries, ash content and seperation efficiencies. Besides, recent techniques’s impact to flotation studies was also investigated.

Comments on coal flotation data was not only depending on their ash values, but also depending on their humic acid quantities were also conducted. Humic acid recoveries for lignite samples, batch flotation products, release analysis flotation products and release analysis flotation products with pre-treatment were obtained after several chemical analyses. Humic acid analyses were performed for not only unwashed lignite samples of batch and release analysis flotation products but also products of release analysis experiments which used novel methods as pre-treatment. Extractions and humic acid recoveries were calculated and high humic acid recoveries were obtained under optimal conditions.

Zonguldak-Armutçuk hard coal samples were prepared as -0,500 mm and -0,500+0,038 mm . Tests showed that ultrasonic pre-treatment release analysis flotation floated products were obtained with lower ash ratio and higher combustional recovery from conventional flotation floated products. Also ultrasonic pre-treatment release analysis flotation was given products with lower ash ratio and higher combustional recovery than microwave pre-treatment flotation. Microwave pre-treatment flotation products were obtained with lower ash ratio and higher combustional recovery than conventional flotation release analysis floated products.

METALURJİ VE MALZEME MÜHENDİSLİĞİ ANA BİLİM DALI

MUTLU İlven ,

Danışman : Prof.Dr Enver OKTAY

Anabilim dalı : Metalurji ve Malzeme Mühendisliği

Yılı : 2006

Tez savunma Jürisi : Prof.Dr Enver OKTAY (Danışman)

Prof.Dr.İbrahim YUSUFOĞLU

Prof.Dr.T.Osman ÖZKAN

Prof.Dr.Şerafettin EROĞLU

Prof.Dr.M.Kelami ŞEŞEN