Paper Information

Title: 

PROCESS MINERALOGY OF YAZD GRANITIC SANDS

Type: PAPER
Author(s): IRANNEZHAD M.*,ARABIAN M.,ALINIA F.
 
 *TEHRAN, AMIR KABIR UNIVERSITY, MINING, METALLURGICAL & PETROLEUM ENGINEER DEPARTMENT
 
Name of Seminar: PROCEEDING OF IRANIAN MINING ENGINEERING CONFERENCE
Type of Seminar:  CONFERENCE
Sponsor:  IRANIAN SOCIETY OF MINING ENGINEERING
Date:  2005Volume 1
 
 
Abstract: 

Located at Shirkooh, Yazd, the granitic sands, products of weathering, have a good potential to concentrate mica, feldspar and quartz. Flotation is a process to separate these minerals. Mineralogy and particle size are the most important parameters influencing the performance of the progress. The best particle size range for mica separation is 30-600mm.
Based on the microscopical studies on the thin sections, chemical and phase analysis made by XRF and XRD, the following results were obtained:
- Particle size of row sands is d80=2360
mm
- Main minerals present in the sands are quartz, feldspar, mica (biotite, phologopite and muscovite) and minor minerals are orthopyroxen, calcite, apatite and ferric oxides.
- Alteration and ceritization of feldspar could change the surface properties. The particles creating problems in the separation process performance.
- The roundness of quartz and feldspar particles produced by transportation process has a good influence in the flotation process.
- The quantity of mica and feldspar increased in the fractions finer than 1300 µm and conversely the content of quartz is decreased.
-The degree of liberation of mica is 630
mm.
- Results of the chemical analysis by XRF showed that the contents of TiO2, V2O5 and Fe2O3 increased in the finer fractions as mica increases in these fractions.
- The mineralogical quantity of mica can be estimated by the chemical analysis of TiO2 and V2O5. in this regard the following relation has been developed.
(1)                  Mica Content (%) = TiO2 + V2O5/ 2.781 × 100 -

 
Keyword(s): GRANITIC SANDS, QUARTZ, FELDSPAR, MICA, CUT POINT, MICROSCOPE, PROCESS
 
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