Skip to Content
MilliporeSigma
  • Recovery of iron from cyanide tailings with reduction roasting-water leaching followed by magnetic separation.

Recovery of iron from cyanide tailings with reduction roasting-water leaching followed by magnetic separation.

Journal of hazardous materials (2012-02-16)
Yali Zhang, Huaimei Li, Xianjin Yu
ABSTRACT

Cyanide tailing is a kind of solid waste produced in the process of gold extraction from gold ore. In this paper, recovery of iron from cyanide tailings was studied with reduction roasting-water leaching process followed by magnetic separation. After analysis of chemical composition and crystalline phase, the effects of different parameters on recovery of iron were chiefly introduced. Systematic studies indicate that the high recovery rate and grade of magnetic concentrate of iron can be achieved under the following conditions: weight ratios of cyanide tailings/activated carbon/sodium carbonate/sodium sulfate, 100:10:3:10; temperature, 50 °C; time, 60 min at the reduction roasting stage; the liquid to solid ratio is 15:1 (ml/g), leaching at 60 °C for 5 min and stirring speed at 20 r/min at water-leaching; exciting current is 2A at magnetic separation. The iron grade of magnetic concentrate was 59.11% and the recovery ratio was 75.12%. The mineralography of cyanide tailings, roasted product, water-leached sample, magnetic concentrate and magnetic tailings were studied by X-ray powder diffraction (XRD) technique. The microstructures of above products except magnetic tailings were also analyzed by scanning electron microscope (SEM) and energy disperse spectroscopy (EDS) to help understand the mechanism.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Sodium carbonate decahydrate, 99.999% trace metals basis
Sigma-Aldrich
Sodium carbonate, BioUltra, anhydrous, ≥99.5% (calc. on dry substance, T)
Sigma-Aldrich
Sodium carbonate, anhydrous, powder, 99.999% trace metals basis
Sigma-Aldrich
Sodium carbonate, BioXtra, ≥99.0%
Sigma-Aldrich
Sodium carbonate monohydrate, puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E500, 99.5-100.5% (ex dried subst.)
Supelco
Sodium carbonate, reference material for titrimetry, certified by BAM, >99.5%
Sigma-Aldrich
Sodium carbonate, anhydrous, free-flowing, Redi-Dri, ReagentPlus®, ≥99.5%
Sigma-Aldrich
Sodium carbonate decahydrate, puriss. p.a., ≥99.0% (T)
Sigma-Aldrich
Sodium carbonate, ReagentPlus®, ≥99.5%
Sigma-Aldrich
Sodium carbonate, puriss., meets analytical specification of Ph. Eur., BP, NF, FCC, E500, anhydrous, 99.5-100.5% (calc. to the dried substance)
Sigma-Aldrich
Sodium carbonate, anhydrous, free-flowing, Redi-Dri, ACS reagent (primary standard), 99.95-100.05% dry basis
Sigma-Aldrich
Sodium carbonate, anhydrous, powder or granules, free-flowing, Redi-Dri, ACS reagent, ≥99.5%
Sigma-Aldrich
Sodium carbonate monohydrate, ReagentPlus®, ≥99.5%
Sigma-Aldrich
Sodium carbonate, ACS reagent, anhydrous, ≥99.5%, powder or granules
Sigma-Aldrich
Sodium carbonate, ACS reagent (primary standard), anhydrous, 99.95-100.05% dry basis
Sigma-Aldrich
Sodium carbonate monohydrate, ACS reagent, ≥99.5%
Sigma-Aldrich
Sodium carbonate, powder, ≥99.5%, ACS reagent
Sigma-Aldrich
Sodium carbonate-12C, 99.9 atom % 12C
Supelco
Sodium carbonate concentrate, 0.1 M Na2CO3 in water, eluent concentrate for IC
Supelco
Sodium carbonate concentrate, Na2CO3 72 mM in water, IC eluent concentrate (20x) for Metrosep A Supp 7