Evaluation of digital image processing (DIP) in analysis of magnetic separation fractions from Na-feldspar ore

  • Ilgin Kursun
  • Mert Terzi
  • Orhan OzdemirEmail author
Original Paper


Combination of flotation and magnetic separation methods is widely used for enrichment of feldspar ores by purifying from dark-colored gangue minerals such as iron and titanium. In this study, the removal of dark-colored minerals from feldspar ore (Aydin Cine region of Turkey) was studied using a dry magnetic separator. The effect of several parameters such as feed particle size, blade angle, and roll speed on the removal efficiency was investigated in detail. In addition, the gangue contents of the magnetic and non-magnetic products were determined by a digital image processing (DIP) method in terms of using color differences between the feldspar sample and gangue minerals. The results obtained from this study clearly indicated that the dry magnetic separation method can be successfully applied in enrichment of feldspar. Meanwhile, the particle size of the sample showed no significant influence on the separation recovery. According to the results obtained from the digital image processing process, the sample with 0.04% cross sectional area of dark-colored minerals can be obtained at roll speed of 100 rpm and 130° of blade angle using the original particle size of 500×106 μm. Additionally, most importantly, these results showed that digital image processing method can be used to determine gangue content (dark-colored minerals) of the magnetic separation products compared to conventional methods as a simple, a reliable, and a repeatable method.


Feldspar Magnetic separation Digital image processing 



This research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.


  1. Bayat O, Arslan V, Cebeci Y (2006) Combined application of different collectors in the floatation concentration of Turkish feldspars. Miner Eng 19:98–101CrossRefGoogle Scholar
  2. Bayraktar I, Ersayin S, Gulsoy OY (1997) Upgrading titanium bearing Na-feldspar by flotation using sulphonates, succinamate and soaps of vegetable oils. Miner Eng 10:1363–1374CrossRefGoogle Scholar
  3. Bayraktar I, Ersayin S, Gulsoy OY (1998) Magnetic separation and flotation of albite ore. In: Atak S, Onal G, Celik MS (eds) Innovations in mineral and coal processing. A.A. Balkema, Rotterdam, pp 315–318Google Scholar
  4. Bernhardt IC (1994) Particle size analyses: classification and sedimentation methods. Chapman & Hall, LondonGoogle Scholar
  5. Burat F, Kokkilic O, Kangal O, Gurkan V, Celik MS (2007) Quartz-feldspar separation for the glass and ceramic industries. Miner Metall Process 24:75–80Google Scholar
  6. Celik MS, Can I, Eren RH (1998) Removal of titanium impurities from feldspar ores by new flotation collectors. Miner Eng 11:1201–1208CrossRefGoogle Scholar
  7. Cocen I, Cicek T, Cilingir Y (1996) Removal of iron-minerals from Aydın-Cine Feldspar by magnetic separation. In: Kemal M, Arslan V, Canbazoglu M (eds) Changing scopes in mineral processing. A.A. Balkema, Rotterdam, pp 155–159Google Scholar
  8. Gulsoy OY, Kademli M (2006) Effects of operational parameters of spiral concentrator on mica–feldspar separation. Miner Process Ext Metall 115:80–84CrossRefGoogle Scholar
  9. Hillier S, Hodson ME (1997) High-gradient magnetic separation applied to sand-size particles: an example of feldspar separation from mafic minerals. J Sediment Petrol 67:975–977CrossRefGoogle Scholar
  10. Kangal O, Guney A (2004) Pilot scale tests for evaluation of feldspar tailings for ceramic industry. Key Eng Mater 264-268:1415–1418CrossRefGoogle Scholar
  11. Liu Y, Peng H, Hu M (2013) Removing iron by magnetic separation from a potash feldspar ore. J Wuhan Univ Technol 28:362–366CrossRefGoogle Scholar
  12. Styriakovaa I, Styriak I, Malachovsky P, Lovasa M (2006) Biological, chemical and electromagnetic treatment of three types of feldspar raw materials. Miner Eng 19:348–354CrossRefGoogle Scholar
  13. Svoboda J, Fujita T (2003) Recent developments in magnetic methods of material separation. Miner Eng 16:785–792CrossRefGoogle Scholar
  14. Ulusoy U (2008) Application of ANOVA to image analysis result of particles produced by different milling. Powder Technol 188:133–138CrossRefGoogle Scholar
  15. Vidyadhar A, Hanumantha Rao K, Forssberg KSE (2002) Adsorption of N-tallow 1,3-propanediamine–dioleate collector on albite and quartz minerals, and selective flotation of albite from Greek stefania feldspar ore. J Colloid Interface Sci 248:19–29CrossRefGoogle Scholar
  16. Wang H, Li X (2004) Magnetic separation technology and equipment research for super-pure feldspar. Conserv Util Min Res 3:37–38Google Scholar

Copyright information

© Saudi Society for Geosciences 2018

Authors and Affiliations

  1. 1.Faculty of Engineering, Department of Mining EngineeringIstanbul UniversityIstanbulTurkey

Personalised recommendations