Large amounts of uranium waste rocks and tailings resulting from the exploitation and treatment of uranium ore at the Northern Guangdong mine (South China) have been accumulated in dams (tailing ponds). To reduce the dispersion of natural radionuclides into the environment, some dams were revegetated with arbor, bush and sward. Besides these plants, Miscanthus floridulu is the dominant plant gr...

The specific hydrogeoecological conditions of aquifers some technogenic formations, mainly iron ore skarn-magnetite and titanium-magnetite are considered. resulting wastes, which stored in waste disposal sites during development deposits, due to the impact a number factors (natural technogenic) form waters. Waste facilities complex engineering structures (dumps sludge storages), turn create the...

Changes in the tailing properties (increasing clay mineral content and fine particles) and poor operation of the dewatering systems have negative impacts on the Tailing Storage Facilities (TSF) of the Shahrbabak copper complex. The design solid concentration of the thickened tailings is 63 wt.% in the Shahrbabak paste plant but it is well below the design value right now (approx. 55 wt.%). The ...

The mineral processing of friable iron ores usually generates ultrafine (smaller than 15 µm) particles, normally called slimes, which have a high grade and are disposed into tailings dam. traditional process techniques for ore do not work efficiently with ultrafines; however, selective flocculation is an alternative to concentrate that fraction. physical-chemical treatment slime was studied her...

The article presents the results of research on development processes and equipment for ore preparation pneumatic dry beneficiation mineral ores. methods crushing grinding before enrichment minerals have been considered, geomaterials is investigated. Highly efficient prototypes are developed tested: crushers multiple dynamic impact RD-MDV-900, DKD-300, centrifugal grinders CMVU-800 VCI-12, sepa...

The "Agios Philippos" mine in the Kirki region (NE Greece) has been abandoned in 1998 after half a century of ore exploration without a reclamation or remediation plan. This article aims at elucidating the potential environmental risks associated with this site by quantifying pollution in tailing basins, stream waters, stream sediments and agricultural fields. Concentrations of heavy metals in ...

This paper may be of particular interest to the readers as it provides a new environmental risk assessment system for phosphogypsum tailing dams. In this paper, we studied the phosphogypsum tailing dams which include characteristics of the pollution source, environmental risk characteristics and evaluation requirements to identify the applicable environmental risk assessment methods. Two analyt...

E-tailing websites are often perceived to be static, impersonal and distant. However, with the movement of the World Wide Web to Web 2.0 in recent years, these online websites have been found to display personalities akin to ‘humanistic’ qualities and project impressions much like its retailing counterpart i.e. salespeople. This paper examines the personality of e-tailing websites and their imp...

First, concentrating on the seasonal (s = 52) lags, the ACF shows a strong peak at h = 1s and lesser, but still statistically significant peaks at h = 3s , 4s, 5s, and 7s. The PACF shows statistically significant peaks at only h = 1s. It appears that: • the ACF is cutting off after lag 1s and the PACF is tailing off in the seasonal lags • the ACF is cutting off after lags 3s, 4s, 5s, or 7s, and...

The present study addresses the direct flotation route for the concentration of a zinc silicate ore. Flotation of hemimorphite faces some challenges due to the similarity of hemimorphite and quartz surface properties. XRD, and XRF analyses, optical mineralogy and SEM with X-ray mapping were performed for characterization. The results showed that the quartz, hemimorphite, calcite and dolomite ar...