In the coal preparation plant, the run of mine coal undergoes a series of operations, including washing, wet screening, sedimentation and dewatering. The process requires the circulation of large volumes of water from which large volumes of waste water containing a variety of solid particles are generated. Clarification of the tailing water is often carried out in a thickener by adding suitable...

Large-scale application of filled coal mining technology has long been limited by conditions such as the cost filling. Compared to traditional filling materials, flotation tailing materials (CFTFM) offers advantages low and excellent performance. The Box–Behnken response surface method was used investigate influence properties on mechanical hydration mechanisms material. Ash content, blending, ...

agh darreh tailing dam located in 23 km north of takab, west azarbayjan province is used for disposal of mine tailings. the tailing dam and its reservoir were constructed on gypsiferous marlstones. this is emphasis on geotechnical and environmental importance of the site. although construction of dams on gypsum rocks were not yet prohibited, but the dissolution of gypsum in contact with water i...

Atmospheric radon concentrations were monitored from autumn 2004 to winter 2007 in an abandoned coal mining area of SW Poland that contained various bedrock uranium contents, ranging from 1 to 8 ppm. Gamma spectrometric measurements of eU, eTh and K content in the bedrock were combined with radon-monitoring results at 77 points, obtained via Kodak LR-115 detectors. The average atmospheric radon...

The mineral and chemical composition of magnetic (tailing fraction) non – (clean coal products from the dry separation samples with high ash sulfur contents obtained Çanakkale Çan lignite (S1) Manisa Kula Pabuçlu (S2) were investigated in this study. feasibility technique for minerals matrix was identified as function types particle sizes. depends on fragments being weakly diamagnetic, while mo...

Acid mine drainage (AMD) and mine tailing environments are well-characterized ecosystems known to be dominated by organisms involved in iron- and sulfur-cycling. Here we examined the microbiology of industrial soft coal slags that originate from alum leaching, an ecosystem distantly related to AMD environments. Our study involved geochemical analyses, bacterial community profiling, and shotgun ...

The goal of the current study was to investigate the effects of pollution on aquatic organisms in the Yongcheng coal mine subsidence area. Crucian carp (Carassius auratus) were collected from Yongcheng natural fishpond (experimental group) and Tianmu Lake (control group), and the spleens were isolated for analysis. Subsequently, histological changes, DNA damage, and antioxidant enzyme activity ...

Elevated air temperatures in cities with potential negative effects on, e.g., residents are a major challenge for urban planning. Open green spaces on hills where at night can cool and drain into residential areas of great importance to ameliorate the heat load areas. In Ruhr Metropolitan Region Germany, tailing piles from former coal mining industry offer previously neglected cooling neighbour...

The stability of tailing dam has an important influence on the surrounding ecological environment and the security and property of people. This article, from the micro perspective, analyzes of the water-tailing chemical interactions and process and analyzes its effects on tailing micro structure and dam stability. The experimental results show that ferrous iron in water(PH=9.5-10.3) is constant...