Contents of total Hg and Hg fraction, organic matter, pH, grain size and chemical composition were measured to investigate the pollution characteristics and binding behavior of Hg in soils collected from the Chatian Hg mining deposit (CMD), southwestern China. The average concentration of Hg concentration in the CMD soils was 155 and 1,315 times higher than that in control soils and Chinese soi...

The management of marine sand mining contributes positively to infrastructure development but can also negatively impact oceanographic parameters and ecosystems. This study aims describe the profile waves tides after sea in Bone Malonjo waters, North Galesong District, Takalar. research method is tidal wave data collection. Wave Numerical Modeling was conducted using DHI-Mike 21 software, speci...

Physical simulation is one of the effective methods to study mining problems, but selection and proportion materials are greatly affected by regional environment. This paper based on a multilevel orthogonal design test scheme using sand, lime, gypsum as in Shangwan coal mine Shendong coalfield, with sand cement ratio, paste ash maintenance days variables. The effect polar difference method stre...

Western Research Institute is developing a new pyrolysis process called ROPE© (Recycle Oil Pyrolysis and Extraction) for recovering products from tar sands that require a minimum of upgrading to produce finished, marketable fuels or that can be used as a diluent to decrease the pour point of bitumen for transportation. The concept consists of two pyrolysis steps: (1) retorting tar sand at a low...

To improve the wear resistance and mineral crushing performance of grinding rollers in cement, mining, other engineering fields, a striped groove morphology was designed on normal roller surface this study. The with different parameters quartz sand were tested purposely device. depth number grooves used as structural grooves, test protocol experimental design method. results showed that better ...

Abstract Since the mid-twentieth century, Polish rail network has been experiencing a systematic decline of its lines and this includes railway serving only freight services. One most striking examples transport is sand railways in southern Poland. This world-unique system for transporting backfill used hard coal mining was one spectacular types specialized transport. The general crisis Poland,...