Pretreatment of refractory gold minerals by ozonation before the cyanidation process: A review

Piervandi, Zeinab

doi:10.1016/j.jece.2022.109013

Cited by 10 publications

(3 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Significantly, the C and As in the gold concentrate can have an impact on the subsequent gold-leaching treatment, causing a gold-robbing effect or reacting with the gold-leaching agent [9,39]. Therefore, for the gold concentrate containing carbon and arsenic, we removed the harmful elements such as C and As during pretreatment and then carried out leaching for gold extraction [40][41][42]. Since C and As are enriched in the concentrate, it can be seen from Figure 23 that the concentrate yield was 12.07%, which is greatly reduced compared with the raw ore concentrate.…”

Section: Property Analysis Of Flotation Concentrate and Tailingsmentioning

confidence: 99%

“…carbon and arsenic, we removed the harmful elements such as C and As during pretreatment and then carried out leaching for gold extraction [40][41][42]. Since C and As are enriched in the concentrate, it can be seen from Figure 23 that the concentrate yield was 12.07%, which is greatly reduced compared with the raw ore concentrate.…”

Section: Property Analysis Of Flotation Concentrate and Tailingsmentioning

confidence: 99%

See 1 more Smart Citation

Using Kerosene as an Auxiliary Collector to Recover Gold from Refractory Gold Ore Based on Mineralogical Characteristics

Sun,

Yu,

Jin

et al. 2023

Separations

View full text Add to dashboard Cite

Carbon–arsenic-bearing gold ore is a typical complex refractory gold resource. Traditionally, xanthate was often used as a flotation agent to separate gold minerals. But, in this paper, in order to reduce the cost of the agent, kerosene was used as an auxiliary collector, and the gold grade and recovery rate were increased by about 10 g/t and 5.5%, respectively. Through process mineralogy studies of the raw ore, it was found that the ore has an Au grade of 5.68 g/t, most of which is surrounded by sulfide ore, accounting for 79.46%. The main minerals are pyrite, arsenopyrite, and quartz, etc. Their content, shape, particle size distribution, and occurrence state were obtained via microscopic observation and statistical analysis. According to the results of process mineralogy, various flotation conditions were tested, including grinding fineness, kerosene dosage, collector dosage, foaming agent dosage, and the slurry pH value. The optimal chemical system and the process flow of “two roughing, three cleaning and two scavenging” were finally determined, and the concentrate product with a gold grade of 42.83 g/t and recovery of 91.02% was obtained, which verified the feasibility of the kerosene-assisted xanthate flotation of refractory gold.

show abstract

Section: Property Analysis Of Flotation Concentrate and Tailingsmentioning

confidence: 99%

Section: Property Analysis Of Flotation Concentrate and Tailingsmentioning

confidence: 99%

Using Kerosene as an Auxiliary Collector to Recover Gold from Refractory Gold Ore Based on Mineralogical Characteristics

Sun,

Yu,

Jin

et al. 2023

Separations

View full text Add to dashboard Cite

show abstract

“…The presence of fine gold in rock-forming minerals is a common factor contributing to the refractoriness of such ores. Additionally, the significant content of arsenic, antimony, and iron compounds increases the operating costs associated with their extraction, requiring additional preparatory steps for cyanidation of the concentrate [ 9 ]. This restricts the application of existing processing methods for gold-bearing materials [ 10 ] and leads to the storage of these concentrates in specialized landfills or their sale to countries where their processing is possible due to lower environmental protection requirements.…”

Section: Introductionmentioning

confidence: 99%

Development of a Two-Stage Hydrometallurgical Process for Gold–Antimony Concentrate Treatment from the Olimpiadinskoe Deposit

Rusalev¹,

Rogozhnikov

Dizer

et al. 2023

Materials

View full text Add to dashboard Cite

An integrated two-stage metallurgical process has been developed to process concentrates from the Olimpiadinskoe deposit, which contain high levels of antimony and arsenic. The optimal parameters for the alkaline sulfide leaching process of the initial concentrate from the Olimpiadinskoe deposit were determined to achieve the maximum extraction of antimony at a 99% level. The recommended parameters include an L:S ratio of 4.5:1, a sodium sulfide concentration of 61 g/L, a sodium hydroxide concentration of 16.5 g/L, a duration of 3 h, and a temperature of 50 °C. A synergistic effect of co-processing alkaline sulfide leach cakes with sulfuric and nitric acids was observed. The pre-treatment step reduced the nitric acid composition by converting carbonates into gypsum and increased the arsenic extraction by 15% during subsequent nitric acid leaching. The laboratory research on the nitric acid leaching of decarbonized cake established the key parameters for the maximum iron and arsenic extraction in solution (92% and 98%, respectively), including an L:S ratio of 9:1, a nitric acid concentration of 6 mol/L, and a time of 90 min. Full polynomial equations for the iron and arsenic extraction from the decarbonized cake were derived. The model demonstrated a high relevance, as evidenced by the determination coefficients (R2) of 96.7% for iron and 93.2% for arsenic. The technology also achieved a high gold recovery rate of 95% from the two-stage alkaline sulfide and nitric acid leach cake. Furthermore, the maximum deposition of arsenic from the nitrate leach solution in the form of insoluble As2S3 was determined to be 99.9%. A basic technological flow sheet diagram for processing the flotation gold–antimony concentrate from the Olimpiadinskoe deposit was developed, including two stages: the production of metallic antimony and the gold extraction from the nitric leach cake.

show abstract

Manipulating Iron Precipitation and Gold Deportment During Pressure Oxidation

Vaughan,

Legge,

Gudgeon

et al. 2024

The Minerals, Metals &Amp; Materials Series

View full text Add to dashboard Cite

Pretreatment of refractory gold minerals by ozonation before the cyanidation process: A review

Cited by 10 publications

References 48 publications

Using Kerosene as an Auxiliary Collector to Recover Gold from Refractory Gold Ore Based on Mineralogical Characteristics

Using Kerosene as an Auxiliary Collector to Recover Gold from Refractory Gold Ore Based on Mineralogical Characteristics

Development of a Two-Stage Hydrometallurgical Process for Gold–Antimony Concentrate Treatment from the Olimpiadinskoe Deposit

Manipulating Iron Precipitation and Gold Deportment During Pressure Oxidation

Contact Info

Product

Resources

About