In order to promote the development of coal gangue aggregate concrete and the resource utilization of coal gangue solid waste the coal gangue samples were crushed into aggregates and then the macroscopic characteristics and microscopic structures of the aggregates were characterized through methods such as calcination sulfuric acid solution dry
Jaw crusher is large crushing ratio and high capacity The feed inlet of the large jaw crusher is larger than 600MM that of the medium sized one is 300 600MM and that of the small one is below 300MM Double roller crusher is suitable for medium and fine crushing of materials with a size less than 150mm The finished product is uniform in shape
To represent the particle behaviors and to predict the product size distributions of coal breakage products by a double roll crusher a new combined breakage agglomeration model has been
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
CG1 is Hebei coal gangue which comes from a coal gangue processing plant in Xingtai Hebei Province It is brownish black powder after drying and grinding CG2 is Shanxi coal gangue from Shanxi Geology Group Co Ltd After treatment the color is black and gray CG3 is Chongqing coal gangue sampled from Chongqing coal gangue mountain after
Coal gangue crusher mainly consists of two rotors with large crushing ratio high production efficiency and uniform particle size When the material enters the crusher it is first impacted by the high speed rotating hammerhead and then crushed by the collision between the hammerhead and the material The crushed material is then impacted by
In order to improve the utilization rate of coal gangue as aggregate in concrete based on the orthogonal experimental design method the L16 4 5 orthogonal table was used to initially prepare the mix ratio and the concrete compressive specimens were poured and their compressive strength was tested after standard curing for 7 significance of the three
Toothed Roller Crusher Processing ability 70 460 t/h Feeding granularity 100 800 mm Dimensions 2100×2450×2000 2500×4360×2400 mm Applied material coal pebble perlite limestone
In roof coal gangue containing coal seams can be divided into three types based on their constituent layers The breaking characteristics of the seams depend on the thickness of the seams Xie et al 2020; Xie et al 2022; Chen et al 2023 The thick seam of roof coal is mainly in the cantilever mode and supports the upper roof which
In Tangshan Mine there are four engineering problems including the layout of multiple seam mining system serious environmental damages caused by gangue accumulation and surface collapse nearly 100 million tons of three under coal coal trapped under buildings water bodies and railways to be released and the control accuracy of stratum formations to
The compaction and re crushing characteristics of quarry filling material are important factors which affect its filling effect and quality [1 2] As the gangue filling material is widely sourced economical and inexpensive mine filling accounts for most of its use and the gangue material as a filling body can account for a large amount of gangue reducing the land
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
Coal gangue crusher and pulverizer Pulverizers and sand making machines have been widely used in coal gangue production cement production lines Whether coal gangue is used to make bricks or as cement additives or supplied to coal gangue power plants the processing equipment usually used includes jaw crushers impact crushers Raymond mills
Coal gangue is mostly sandstone and shale which have compressive strengths ranging from 30 to 50 MPa The satisfactory mechanical properties of coal gangue make coal gangue concrete feasible especially for underground tunnel shotcrete support and grouting Before the test coal gangue was crushed by an alligator crusher PE250 × 400
In this experiment the influence of coal gangue as the admixture on the performance of dry mixed mortar was studied and the results were analyzed by XRD and SEM The effects of different ways of crushing particle size distribution coal gangue cement admixture and water content on the water retention consistency and 7 d compressive
Qiu et al [31] prepared coal gangue CG concrete by substituting crushed stone with coal gangue aggregate They conducted microhardness tests to analyze the influence of 0% 10% 20% 30% and 40% FA on ITZs Liaoning China while the coal gangue CG was obtained from a coal mine in Fuxin After crushing with a jaw crusher and sieved
Although the calcination based activation of coal gangue is important for its valorization in the form of cementitious materials the related works mainly focus on high quality coal gangue neglecting its low quality counterpart To bridge this gap we herein conducted the pilot scale suspension calcination of low quality coal gangue; explored the effects of calcination
About Centbro STM Henan Centbro Machinery STM Equipment Co Ltd sepecializes in the production and sales of mining machine and equipment Jaw Crusher Impact crushers Cone Crusher Sand making machines ball
CG1 is Hebei coal gangue which comes from a coal gangue processing plant in Xingtai Hebei Province It is brownish black powder after drying and grinding CG2 is Shanxi coal gangue from Shanxi Geology Group Co Ltd After treatment the color is black and gray CG3 is Chongqing coal gangue sampled from Chongqing coal gangue mountain after
Global rise in greenhouse gas emissions GHG is triggered mainly due to the consumption of fossil fuels for power generation and domestic usage Among the fossil fuels coal is a primary contributor to global GHG with substantial emissions generated during its mining and combustion process Coal gangue a residue produced during the coal mining process has
The results were applied in optimizing an industrial scale crushing system and two toothed roll crusher of a coal gangue fired power plant Investigations demonstrated that the PSD can improve the
The persistent reliance on coal has resulted in the accumulation of substantial coal gangue a globally recognized problematic solid waste with environmental risks Given the coal gangue properties and global land degradation severity the resourceful utilization of coal gangue as soil conditioners is believed to be a universally applicable cost effective high
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