Şelit Cevherinin Fiziksel ve Manyetik Alınganlık Özelliklerinden Yararlanılarak Zenginleştirilmesine Yönelik Deneysel Çalışma

Tungsten metali yüksek erime sıcaklığı (3.410 oC) ve yoğunluğu (19,3 g/cm3) nedeniyle birçok endüstriyel uygulamada kullanılmaktadır. Aydınlatma lambalarının filamenti, tungsten metalinin günlük hayatta kullanımına en güzel örnek olarak gösterilmektedir. Ancak, doğada bulunan tungsten cevherlerinin WO3 tenörü %0,30-%1,50 arasında değişmekte ve zenginleştirme işlemleri ile cevherin içerdiği WO3 tenörünün yükseltilmesi gereklidir. Bu sebeple Uludağ/Bursa bölgesinden alınan şelit cevherinin fiziksel ve manyetik alınganlık özelliklerinden yararlanılarak zenginleştirilmesi araştırılmıştır. Gemini masası ile cevherin WO3 tenörü %84,37 verimle %0,32'den %5,01'e yükseltilmiştir. Manyetik ayırma testleri ile birlikte WO3 tenörü %95 verimle %41,37 olmuştur. Son aşamada, kavurma işleminin ardından manyetik ayırma testleri tekrarlanmış, nihai konsantrenin WO tenörü %49,94 ve zenginleştirme prosesinin verimi %83,51 olarak hesaplanmıştır

Experimental Study on Beneficiation of Scheelite Ore through its Physical and Magnetic Susceptibility Properties

Tungsten metal is used in many industrial applications due to its high melting temperature (3,410 oC) and density (19.3 g/cm3). The filament of lamps can be shown as the best example for the daily use of tungsten metal. WO3 content of tungsten ores however varies from 0.30% to 1.50% in nature. It is necessary that the WO3 content of the ore must be increased through beneficiation methods. For this purpose, beneficiation of scheelite ore collected from Uludag/Bursa was investigated depending on its physical and magnetic susceptibility properties. The WO3 content of scheelite ore increased to 5.01% from 0.32% with 84.37% recovery using a Gemini shaking table. Thereafter, that value was upgraded to 41.37% with 95% recovery after the magnetic separation. In the last stage, roasting followed by magnetic separation tests were performed and the WO3 content of final concentrate was 49.94% and the recovery of the process conducted in this paper was calculated as 83.51%

Kaynakça

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