Recycling of platinum-group metals from spent automotive catalysts by smelting

Tang, Huarong; Peng, Zhiwei; Tian, Rong; Ye, Lei; Zhang, Jian; Rao, Mingjun; Li, Guanghui

doi:10.1016/j.jece.2022.108709

Cited by 17 publications

(3 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…An innovative approach employing nickel matte as a collector for the microwave smelting pyrometallurgical extraction process was explored for the recovery of platinum group metals from spent catalysts. 29,30 Capitalizing on the superior microwave absorptivity of nickel matte, the process exhibits a rapid heating rate in the surrounding region and a short smelting time. Notably, sodium tetraborate was successfully validated as fluxes for the first time.…”

Section: Novel Exploration For Noble Metal Pyrometallurgical Extractionmentioning

confidence: 99%

See 1 more Smart Citation

Trash or treasure? Sustainable noble metal recovery

Wei,

Zhang,

Gao

2024

Green Chem.

View full text Add to dashboard Cite

show abstract

Section: Novel Exploration For Noble Metal Pyrometallurgical Extractionmentioning

confidence: 99%

“…Nonetheless, further separation and purification processes are necessary for the resulting product, which is platinum group metal-enriched nickel matte. 29,30 The inherent limitation of microwave fields mandates the utilization of a dedicated microwave smelting furnace for this technology.…”

Section: Techno-feasibility Analysismentioning

confidence: 99%

Trash or treasure? Sustainable noble metal recovery

Wei,

Zhang,

Gao

2024

Green Chem.

View full text Add to dashboard Cite

show abstract

“…Base metals and their binary or multicomponent alloys in the molten state are effective and reliable collectors of precious metals. The long-term practice of copper, nickel, lead, and zinc metallurgy shows that trace precious metals in ores can be captured into matte or final metal phases in the smelting process [19,20]. Therefore, chlorination roasting has the advantages of strong applicability of raw materials, high separation efficiency, and good comprehensive recovery efficiency for the low-grade cyanide tailings [17,21].…”

Section: Introductionmentioning

confidence: 99%

The Recovery of Gold in Low-Grade Cyanide Tailings by Chlorination Roasting

et al. 2023

View full text Add to dashboard Cite

The resource utilization of cyanide tailings has significant environmental and economic benefits. The efficient recovery of gold from low-grade cyanide tailings containing 1.71 g/t Au was performed by a chlorination roasting–flotation process. The effects of roasting temperature, calcium chloride, internal coke, external coke, copper sulfide concentrate, and kaolin on the recovery rate of concentrate, gold grade, and sorting efficiency were investigated. The optimized process parameters were as follows: 16 wt% calcium chloride dihydrate, 6 wt% internal carbon, 1 wt% external carbon, 9 wt% copper sulfide concentrate, 2 wt% kaolin, and roasting temperature of 730 °C. The sorting rate, gold grade, and recovery rate of gold concentrate can reach 88.48%, 33.46 g/t, and 76.7%, respectively, and the gold grade of tailings was as low as 0.17 g/t. In the matte phase, gold can be enriched in the form of gold grains. Therefore, through chlorination roasting, the trapped gold can be released and deposited on the surface of the matte phase due to the transformation from hematite to magnetite. The gold-deposited metal sulfide can be effectively recycled through flotation. These results have potential guiding significance for the efficient recovery of gold from cyanide tailings.

show abstract