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A new generation of high-efficiency coarse and medium-fine crushers: CI5X series impact crushers
·Based on the separation and backfilling system of coal and gangue the mineral material impact experiments were conducted utilizing the hardness difference between coal and gangue according to the uniaxial compression experiments The broken coal and gangue particles were collected and screened by different size meshes The particle size distributions of coal
·Coal gangue refers to the carbon containing solid waste discharged from the coal mine during the develop ment and excavation coal mining raw coal washing and other production processes It is
·In the early stages of coal mining the sorting of coal from gangue was mainly done manually This inefficient and costly way of sorting by hand also harmed workers health an underground coal gangue separation machine based on the differential crushing capabilities of an elastic load crusher China s first underground coal preparation
·Coal gangue as a solid waste generated during coal mining and washing not only encroaches on a large number of land resources but also poses certain risks to the environment °C and 700 °C respectively For the preparation of CG biochar the coal gangue is crushed into less than 2 cm by a crusher and then ball milled for 3 h with
·The method of filling mining can solve the problem of surface subsidence caused by coal mining Among them it is crucial to study the mechanism of filler strength improvement timeliness and
·lected from Xiaojihan Coal Mine in Yulin Shanxi X ray diraction spectra of coal gangue powder and fly ash were measured by X ray powder diractometer model D2 Advance as shown in Fig 2 Coal gangue and y ash are mostly composed of SiO2 and Al2O3 and the content of other components was slightly dierent Large pieces of coal gangue were bro
·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
·The simulated grouting filling material used in the test was prepared by gangue from Hongqinghe Coal Mine and tap water The gangue was crushed and sieved into fine powder gangue particle size less than mm and large particle gangue particle size of 1 mm by jaw crusher roller sanding machine and ball mill
·In coal mining the automatic removal of coal gangue is an important link in modern coal production and processing The majority of coal mining and production in China has been screened and large gangue sizes have been screened manually Zou et al Citation 2020 Manual gangue selection is a backward method with excessive labor intensity and
·Coal gangue produced during coal mining and processing [1 2] is one of the most extensively produced solid wastes in China [1 3] accounting for approximately 10%‒20% of raw coal production [] The accumulation of coal gangue causes serious environmental social and economic problems in the coal mining area [] Heavy metals and harmful organic substances in
13 ·The large scale open air storage of coal gangue often leads to oxidation and decomposition due to natural weathering resulting in decreased strength and instability which limits its wider application in concrete pavement To address these issues this paper proposed a composite consolidation treatment for weathered coal gangue WCG assessing its
·Coal gangue is waste rock obtained from coal mining and processing China is a large coal resource country with a large quantity of coal gangue [1] On the one hand according to Chinese statistics 6 7 billion tons of coal gangue has accumulated over the years with an increasing rate of 200 million tons per year resulting in vast land occupation in mines severe
·As shown in Fig 1 a after being crushed by a jaw crusher and sieved through a vibrating screen CGCAs with a continuous gradation of 20 mm and A large amount of raw coal gangue RCG is generated during coal mining which results in serious environmental problems and vast land occupation Considering the similarity between RCG
·Table 3 reflects the actual influence rates of raw coal mining gangue filling coal gangue separating and material transportation on the carbon emission intensity of the coal mine after the unit energy consumption of the main production links in MSBICM was increased by kg standard coal each which were % % % and %
·Based on the problems of high carbon emission and high cost of traditional mining methods and filling materials the tailings powder modified Coal Gangue based Cementitious Backfill Material CGCBM was used for paste filling mining In this study the samples were prepared with different tailings powder content and different curing ages The
·Tooth roll crusher for coal metallurgy mining chemicals building materials and other industries more suitable for large scale coal or coal preparation plant including gangue broken Roll crusher capacity coupled with the limited pitch type fluid coupling between the motor and reducer to prevent power overload overload sensors safe and
·Double Stage Crusher for Highly Wet Coal Gangue Whether you need a primary crusher for large scale mining operations or a mobile german paving machine slipform paver machine Consultar The German paving machine slipform paver machine is a highly efficient and precise piece of equipment used in road construction and pavement laying This
·The increase of raw coal mining speed and ground gangue supply speed will inevitably lead to the increase of workload of relevant equipment per unit time thus improving the utilization rate of these equipment Therefore when the utilization rate of a certain equipment is close to 100% the coal mine production is maximized which is an ideal
·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 Figure 5 shows the breaking process for coal gangue with a counterattack crusher The gangue materials are piled up around the crawler and transmitted to the counterattack crusher
·Currently the main method of mine solid waste disposal and utilization is to apply gangue to underground filling For the grading characteristics of coal gangue in the hollow zone in underground
·This study examines the particle size and distribution of the main chemical components of gangue during the crushing process Coal mine gangue was chosen as the research object and its particle size and chemical components at various crusher discharge settings were examined through screening grinding chemical composition testing and other
·Coal is one of the primary energy sources in China Due to different mining processes the environmental impact of each mining method varies Traditional mining methods have relatively low costs but a substantial ecological impact For example backfilling mining is environmentally friendly but raises mining costs for surface settlement coal gangue solid
·The tailings sand TS used in this study were sourced from the Tonnage Iron Mine in Fuxin Liaoning China while the coal gangue CG was obtained from a coal mine in Fuxin After crushing with a jaw crusher and sieved CG particles with a diameter between 20 and 25 mm were selected
