Ugur ULUSOY, Osman Nuri ATAGÜN

9613

Sivas ili Kangal-Çartıl yöresi kromit cevherlerinin sarsıntılı masa zenginleştirme ürünlerinin çeşitli teknikler kullanılarak tane şekilleri açısından incelenmesi

Bu çalışmanın amacı; Sivas ili Kangal yöresinde faaliyet gösteren Aksu Madencilik kromit zenginleştirme tesisindeki iri ve ince sarsıntılı masa zenginleştirme devrelerinden alınan temsili örneklere ait tanelerin şekillerinin hızlı ve güvenilir sonuçlar veren dinamik görüntü analizi (DGA) ile incelenmesi, taramalı elektron mikroskop (SEM) ve stereo-mikroskop analizleriyle karşılaştırılması ve masa ayırmasındaki etkisinin yorumlanmasıdır. Her bir ölçümde 10,000’den fazla tanenin sayıldığı en az 4 tutarlı ölçümün ortalamasına göre, konsantre ürünlerinin (%95 güven aralığında) besleme, ara ürün ve artık ürünlerine göre en yüksek dairesellik (C) değerine sahip, artık ürünlerinin ise en düşük C değerine sahip (en uzun) tanelerden oluştuğu bulunmuştur. Bu sonuç, farklı şekilde tanelerin masa yüzeyi üzerinde farklı hareketler yapmasına dayandırılmaktadır. DGA görüntüleri, SEM görüntüleri ve stereo-mikroskop görüntüleri DGA sonuçlarını desteklemektedir ve literatürde daha önce bildirilen çalışmalar ile uyumludur. Sonuçlar, aynı boyut aralığında sarsıntılı masa ayrımında sadece tane yoğunluğunun değil aynı zamanda tane şeklinin de ayırmaya etkisi olduğunu göstermektedir. Bu çalışma kromitin gravite zenginleştirilmesi devrelerinde, sarsıntılı masalara beslemek için daha yuvarlak taneler üreten öğütme sistemlerinin tercih edilerek daha yüksek ayırma veriminin elde edilebilmesine ışık tutacaktır.
Anahtar Kelimeler:

tane şekli, yuvarlaklık, dinamik görüntü analizi, sarsıntılı masa, kromit zenginleştirme

Investigation of Shaking Table Beneficiation Circuit Streams of Chromite Ore from Sivas Kangal-Cartıl Region in Terms of Particle Shapes by Using Various Techniques

The purpose of this study is not only to examine the shapes of representative samples taken from coarse and fine shaking table concentration circuits in a chromite concentration plant (Aksu Group Mining Industry Co. Inc.) operating in the Kangal region of Sivas, with dynamic image analysis (DIA) that gives fast and reliable results, but also to compare their results with scanning electron microscope (SEM) and stereo-microscope analyzes and to interpret the effect of their shapes on table separation. Based on more than 4 successive measurements for each sample by counting more than 10,000 particles, concentrate products (at 95% confidence interval) have the highest Circularity (C) values compared to other products, whereas tailing products have the lowest C values (elongated particles) compared to other products. The difference in shape of products is attributed to different movements of the particles on the table surface. In addition, DGA images, SEM images and stereo-microscope images support the DGA results and are compatible with previous studies in the literature. The results show that not only particle density but also particle shape has an effect on the shaking table separation at the same size range. The results of this study will shed light on the fact that higher separation efficiency can be obtained by preferring grinding systems that produce more rounded grains for feeding into shaking tables in chromite gravity enrichment circuits.
Keywords:

particle shape, Circularity, Dynamic image analysis, Shaking Table, Chromite concentration,

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Scientific Mining Journal-Cover
  • ISSN: 2564-7024
  • Başlangıç: 1960
  • Yayıncı: TMMOB Maden Mühendisleri Odası
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