·Traditional Coal Gangue Separation Process and Equipment Water washing and dry coal preparation are the main parts of coal preparation Spiral separation jigging heavy medium separation and other processes are water washing processes which have the advantages of mature technology high separation accuracy and large processing capacity
·China s total coal production in 2021 exceeded billion tons 52% of the world s total Coal gangue a solid waste of coal mining accounts for 15 20% of coal production when directly discharged on the ground surface as waste heaps it occupies large areas of land and cause environmental pollution This paper summarizes the existing gangue backfilling
DOI / Corpus ID 234140550; Effects of interface angles on properties of rock cemented coal gangue fly ash backfill bi materials article{Yin2021EffectsOI title={Effects of interface angles on properties of rock cemented coal gangue fly ash backfill bi materials} author={Dawei Yin and Shao jie Chen and Xi Z Sun and Ning Jiang}
·Risk assessment related to heavy metals in mining areas is crucial to ensuring the sustainable development of regional ecosystems and protecting human health However almost all research on the impact of mining activities on environmental quality entails field monitoring of surface soils or soil profiles Here to compare the variety of heavy metal
·Coal gangue is a rock mixed with organic and inorganic compounds co deposited with coal during coal formation Usually in a thin layer and in the coal seam or in the top and bottom of the coal seam gangue is typical solid waste discharged when coal is excavated and washed in the production A kind of Chinese waste material coal gangue was
·Coal gangue is a kind of hard rock produced during coal mining and it commonly comprises limestone claystone and to a lesser extent shale and volcanic rocks It has low carbon content and generally accounts for about 10% of coal output and 25% of China s industrial waste discharge [4 5]
·Pyrite with the chemical formula FeS 2 is a ubiquitous mineral in coal and is a harmful colour stained impurity in kaolinite rich coal gangue which is widely used as a raw material to produce calcined kaolin in many of pyrite to various phases under calcination may influence and even decide ways of comprehensively utilizing of coal
·Coal gangue occupies large swathes of land resources resulting in ecological fragility and various environmental problems Cerdà A Effects of rock fragment cover on soil infiltration
·Abstract Among coal mining related wastes coal gangue CG is the heterogeneous waste generated during the mineral processing or coal washing phase of coal mining A thorough understanding of environmental concerns associated with the current model of
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