Investigation into trace element partitioning behavior from a coal gangue fired power plant in Shanxi province China has been conducted and showed that Hg As Be and Cd were highly volatile elements in the combustion of coalgangue which were notably enriched in fly ash and may be emitted into the environment via the gas phase
Coal gangue is the main solid waste in coal mining areas and its annual emissions account for about 10% of coal production The composition information of coal gangue is the basis of reasonable utilization of coal gangue and according to the composition information of coal gangue one can choose the appropriate application scene The reasonable utilization
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 In China the total of accumulative stockpile of coal
Coal gangue is one of China s main industrial solid wastes which contains various harmful heavy metal elements such as lead Pb The long term accumulation of coal gangue causes Pb to migrate to the surrounding environment due to weathering and rain erosion eventually endangering human life and health with its continuous accumulation in the food
Coal gangue a by product produced during the coal processing has a serious impact on the environment Using coal gangue as a fertilizer has been proven helpful in potentially reducing its environmental impact and improving its value In this study the formation mechanism and influencing factors of coal gangue based silicon fertilizer was studied using XRD and FT
Coal gangue is the solid waste produced during coal mining and accounting for about 10 20% of total coal output It is estimated that about billion tons of coal gangue is produced globally in 2019 However only less than 30% of coal gangue is utilized
Coal gangue is a problematic by product generated from the process of mining and beneficiation of coal It approximately accounts for 10 15 mass % of coal production [] Huge quantities of coal gangue has been stockpiled during decades of coal production and cause severe environmental impacts such as acid drainage heavy metals leaching as well as
In the process of coal gangue surface accumulation and underground filling disposal the heavy metals contained in coal gangue will inevitably precipitate out and migrate which will cause serious environmental pollution Seventy five gangue samples of different geological ages are obtained from 25 coal mines in China The contents of Hg Pb Cd Cr As
The coal gangue dump may introduce heavy metal oid s HMs into surrounding agricultural soils posing potential health risks to nearby communities This study evaluated heavy metal oid pollution
Coal gangue is one of the industrial solid wastes that may harm the human body through the ecosystem for a long time Using coal gangue in geopolymer preparation can effectively reduce cement output and meet the sustainability requirements In this paper the physical and chemical characteristics including the heavy metal content of coal gangue from
For coal and gangue intelligent sorting processes for separation the use of coal and gangue mineral components with different fundamental differences and the study of different properties of minerals and coal with different scales and density regarding the gray value change law are presented The results show that the gray value of single minerals and mixed
making coal gangue pollution under control and promoting the development of ecological civiliza tion It is necessary to continuously explore new ways of utilization of coal gangue due to its large products In the present the main innocuous disposals of coal
The recognition of coal and gangue is the premise and foundation of coal gangue intelligent sorting Adaptive boosting AdaBoost algorithm based coal gangue identification has not been studied in depth This paper proposed a coal gangue image recognition algorithm and a strong classifier based on the AdaBoost algorithm with a genetic algorithm
Coal gangue is a mine waste generated during the mineral processing phase of coal production With the surge in demand for coal in thermal power steel and cement generation industries the rate of coal gangue generation has reached unprecedented heights With the realisation of potential threat posed by coal gangue researchers have made attempts to
Synthesis and development of high efficiency and low cost adsorbents for treating of the wastewater containing heavy metal ions and/or dyes has been aroused worldwide attention in recent years In this study the coal gangue as the only supply of Si and Al was adopted to synthesize sodalite using hydrothermal method Both the gangue and the
The backfilling mining method that fills gobs with coal gangue can prevent water inrush hazards protect groundwater resources and protect the ecological environment of the mining area However initial conditions including the particle size distribution of gangue and the stress environment may affect the seepage characteristics of gangue backfill and inrush
Coal is the main energy in our country and the ballast stone of energy security As an inevitable product in the process of coal mining and coal washing coal gangue has an annual output of more than 700 million tons which is in urgent need of large scale and ecological utilization to solve the problem of coal gangue as a stumbling block in enterprise development
Therefore coal gangue can be used as a substitute for the soil currently used The optimum composition ratio of the coal gangue planting substrate is as follows coal gangue to soil ratio of 1 1 500 g 500 g maize straw content of 50 g kg −1 fly ash content of 37 g kg −1 and water retention agent content of 1 g kg −1 The results
The issue of gangue emissions accompanying coal production is one of the key factors currently hindering the green and efficient development of the coal industry 1 to statistics the
Abstract Coal gangue as one of the largest industrial solid wastes in China brings about very serious environmental social and economic problems Comprehensive utilization of coal gangue is of importance to sustainable development of society and economy
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