In China, the total lead–zinc tailings are approximately 160–200 million tonnes and increase at a rate of 2.5% per year with the rapidly increasing demand of lead and zinc. Lead–zinc tailings mainly contain sulfide with a sulfur content reaching 9.88–26.6% [1], which will stimulate acid mine drainage (AMD) and cause serious …
BHPBilliton owns and operates the Cannington lead-silver-zinc mine and concentrator located in north-west Queensland, Australia. The concentrator uses sequential flotation to selectively float a lead-silver concentrate and a zinc concentrate. Current flotation practice at Cannington allows for valuable amounts of silver to report to the flotation tailings …
The leaching rate of gold is 86.5%, the leaching rate of silver is 48%. The general recovery rate of gold processing and melting is 80.4%. The general recovery rate of silver processing and melting is 38.2%. The value of tailings is brought into full play, and also brings efficiency to the processing plant. 2.
Flotation is the principal beneficiation method to concentrate silver minerals. In previous flotation practice, the collection of associated silver was usually neglected by focusing on the recovery of carrier minerals (normally lead–zinc sulfides). To alter the current situation, we conducted a systematic overview of mineral structure ...
Due to public and environmental concerns over the use of cyanide in gold recovery from ores, renewed interests in thiosulfate leaching as an alternative have started growing. …
This experiment proves that arsenite can be effectively separated by potential regulation. Zhou et al. [10] conducted a flotation test study on a complex lead-zinc ore in Jing Dong Tailings ...
To comprehensively reuse lead-zinc tailings, the recovery of valuable metals from magnetic tailings after iron recovery from lead-zinc tailings using roasting followed by chloride leaching was studied in this paper. The recovery of metals was investigated by studying the effects of roasting temperature, leaching temperature, liquid …
The potential of silver recovery and valorization of derived tailings as ceramics was investigated. • Residual silver was recovered from silver mine tailings …
With the depletion of natural mineral resources, secondary resources such as zinc leaching residue (ZLR) should be processed to recover valuable metals. In this study, flotation recovery of lead (anglesite) in ZLR from a zinc smelting plant was investigated, and the mechanism studied by using Fourier-transform infrared (FTIR) …
In the first step of flotation, the carbon in lead–zinc sulfide ore was removed by adding #2 oil to the flotation tank at a dosage of 40 g/t. In the second flotation process, the pH was adjusted to 7.2, the dosage of isopropyl xanthate was 20 g/t, the dosage of #2 oil was 30 g/t; the flotation reagent in the third step was isopropyl xanthate ...
Abstract The post-leaching of silver (Ag) from a non-sulfide lead–zinc (Pb–Zn) ore flotation tailing leach residue in a copper–ammonium thiosulfate solution was investigated. Ag (89.7%) was extracted … Expand
The flotation behaviour of anglesite from zinc leach residues with 6.9% lead was studied by Rashchi et al. showing, that the highest recovery rate of lead was achieved at a pH of 9.6 when using Na ...
1. Introduction. China is the largest lead and zinc producer in the world and the largest consumer of lead and zinc metals (Moradi and Monhemius, 2011; Mehdilo et al., 2012; Sehlotho et al., 2018).Recently, the consumption rates of lead and zinc metals have increased significantly, mainly due to the rising demand from the construction industry …
A large amount of acid-leaching residue is produced during the conventional Zn hydrometallurgy process, and this residue has a large concentration of a variety of valuable metals. The purpose of this study was to evaluate the ability of a procedure that entails the use of sulfation roasting, water leaching, and chlorination leaching (blowing …
ABSTRACT: Evaluation of tailings from processing plants is always an important issue. Lead-Zinc ore tailings containing 3.12% Zn, 3.43% Pb, 0.71 g/t Au and 74 g/t Ag was subject to this study ...
Ultra-fine grinding (UFG) was proposed as a pre-treatment method prior to cyanide leaching of old plant tailings of a refractory silver ore. Direct cyanidation of the as-received tailings (d80 ...
We execute a kinetics study of silver leaching from tailings, using thiosulfate. • Reaction orders are 1 (oxygen), 0.07 (thiosulfate), 0.45 (pH) and 0.26 (copper). • The activation energy in the range of temperatures 288–328 K was 1.91 kJ·mol − 1. • The kinetics is controlled by, mass transfer of oxygen, in the solid–liquid surface
The post-leaching of silver (Ag) from a non-sulfide lead–zinc (Pb–Zn) ore flotation tailing leach residue in a copper–ammonium thiosulfate solution was …
Under optimized conditions of ultrasonic power, ultrasonic treatment time and solid weight, pilot-scale flotation produced a concentrate that the sulfur grade and recovery of concentrate increased by 11.63 % and 9.10 %, respectively, and the lead and silver recoveries of tailings increased by 8.72 % and 9.50 %, respectively, compared …
The recovery of silver minerals occurring in a lead-zinc sulfide ore is efficiently accomplished using the above flowsheet. The process consists of selective flotation to produce a mixed silver-lead concentrate for maximum smelter return and a separate zinc concentrate. Over-grinding of silver minerals is detrimental to efficient …
The flotation plants achieved metal yields of 60–80%. Thus the tailings contain significant amounts of sulphides not recovered in the flotation process resulting in metal contents of about 0.5–1.5% zinc and 0.3–1.0% lead as well as arsenic and cadmium.
The post-leaching of silver (Ag) from a non-sulfide lead-zinc (Pb-Zn) ore flotation tailing leach residue in a copper-ammonium thiosulfate solution was investigated.
Using 0.37 M EDTA at 80 °C, 1/10 solid-to-liquid ratio for 180 min. leaching time, more than 90% of zinc dissolved along with a substantial amount of iron, arsenic and lead co-dissolutions. 47.4% ...
The dry fine flotation tailings used in this experimental study were obtained from a flotation plant of complex lead-zinc oxide ores (containing 10.17% Pb, 10.98% Zn,
The recovery of zinc from a flotation tailing using 17-different leaching agents, including inorganic and organic acids, alkaline solutions and chelating agents, was investigated. ... which could produce 35,000 tpy zinc, 6000 tpy lead along with 4.5 tpy silver and 125 tpy cadmium from oxide-carbonated zinc-based metals using the Waelz …
The required sulphide–oxide samples were obtained from tailings generated from the lead-zinc flotation circuit at Bama processing plant (Isfahan, Iran). The samples were first crushed in a jaw crusher. Then samples were ground in a laboratory ball mill such as 90% of particles were finer than 150 μm in diameter.
The post-leaching of silver (Ag) from a non-sulfide lead-zinc (Pb-Zn) ore flotation tailing leach residue in a copper-ammonium thiosulfate solution was investigated.
Abstract. The investigation focuses on the recovery of silver from hydrometallurgical leach residues of lead–zinc sulfide concentrates using non-cyanide …
Flotation tailings reprocessing consisted of acid leaching followed by re-flotation of the leach residue. Leaching of the tailings resulted in leach liquors …
Evaluation of tailings from processing plants is always an important issue. Lead-Zinc ore tailings containing 3.12% Zn, 3.43% Pb, 0.71 g/t Au and 74 g/t Ag was subject to this study. Flotation ...
Due to economic reasons, the plant was shut down in 1999. Currently, approximately 1.0 Mt zinc and lead flotation tailings in the Kayseri region are stored in huge tailing ponds. Lead and zinc mine tailings are frequently rich in toxic heavy metals, such as lead, zinc, copper, cadmium, manganese, arsenic and nickel.
Super-hot acid leach residue is generated during zinc production in the roasting–leaching–electrowinning route, where both primary and secondary resources are used as feed material. This residue may contain valuable metals, such as lead, zinc, and iron, as well as precious metals, such as gold and silver. Four materials, namely super …
Recovery of lead from a zinc leach residue of an oxidic ore was investigated using the sulfidization-flotation method on a laboratory scale. The residue was leached to eliminate its soluble compounds.
The study aims to recovery of silver minerals from zinc leach residue by flotation method with mixed collectors, namely, ammonium dibutyl dithiophosphate (ADD) and diethyl dithiocarbamate (DD ...
