BENEFICIATION OF LOW QUALITY QUARTZ SAND BY FLOTATION AND OXALIC ACID LEACHING

Year 2021, , 7 - 20, 01.03.2021

Ş. Beste Aydın , Ceyda Oğuz Alim Gül

https://doi.org/10.30797/madencilik.803383

Abstract

In this study, studies were conducted to remove impurities such as iron, titanium, and aluminum from quartz sand with low SiO2 content for use in industry. Physical, physicochemical, and chemical methods were applied on silica sand containing 82.03% SiO2, 3.13% Al2O3, 0.48% Fe2O3, and 0.17% TiO2 obtained from Camiş Madencilik A.Ş. Magnetic separation was performed as a physical method, but effective results were not obtained. After the dispersion and classification process, the silica concentrate containing SiO2 of 96.30% and Fe2O3 of 0.30% was obtained by using Na2SiO3 as depressant and Derna 7 as collector in the flotation process carried out at pH 9. Since impurities could not be removed sufficiently by physical and physicochemical processes, oxalic acid leaching was applied. As a result of oxalic acid leaching carried out on the silica concentrate obtained with flotation, 97.18% SiO2 and 0.054% Fe2O3 contents were reached in silica sand. Quartz sand with 89.24% SiO2 and 0.076% Fe2O3 content was obtained by directly oxalic acid leaching after dispersion and classification. According to XRD analysis, calcium ions and oxalic acid form calcium oxalate compounds in the material and this situation adversely effects the production of quartz sand with high SiO2 content. It has been determined that the quartz sand used within the scope of the study cannot be used with directly oxalic acid leaching in the sector, but it can be sold its combination with the flotation method.

Keywords

silica sand, magnetic separation, flotation, oxalic acid leaching

DÜŞÜK KALİTE KUVARS KUMLARININ FLOTASYON VE OKSALİK ASİT LİÇİ İLE ZENGİNLEŞTİRİLMESİ

Abstract

Bu çalışmada, düşük SiO2 içerikli kuvars kumunun endüstride kullanılabilmesi için demir, titan ve alüminyum gibi safsızlıklardan ayrılmasına yönelik araştırmalar yapılmıştır. Cam-İş Madencilik A.Ş.’den temin edilen %82,03 SiO2, %3,13 Al2O3, %0,48 Fe2O3 ve %0,17 TiO2 içeren silis kumu üzerinde fiziksel, fizikokimyasal ve kimyasal yöntemler uygulanmıştır. Fiziksel yöntem olarak manyetik ayırma ile zenginleştirme yapılmış ancak etkin sonuçlar elde edilememiştir. Dağıtma ve sınıflandırma işleminin ardından pH 9’da gerçekleştirilen flotasyon işleminde ise bastırıcı olarak Na2SiO3 ve kollektör olarak Derna 7 kullanılarak %96,30 SiO2 ve %0,30 Fe2O3 içerikli silis konsantresi elde edilmiştir. Fiziksel ve fizikokimyasal işlemler ile safsızlıklar yeterli derecede uzaklaştırılamadığı için oksalik asit liçi uygulanmıştır. Flotasyon sonrası elde edilen silis konsantresi üzerinde yapılan oksalik asit liçi sonucunda silis kumunda %97,18 SiO2 ve %0,054 Fe2O3 içeriklerine ulaşılmıştır. Dağıtma ve sınıflandırma sonrası oksalik asit liçi ile ise %89,24 SiO2 ve %0,076 Fe2O3 elde edilmiştir.

Keywords

silis kumu, manyetik ayırma, flotasyon, oksalik asit liçi

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