Coal gangue ultrafine powder mill
Coal gangue is a mixed rock mass discharged during the construction and production of coal mines. Coal gangue can be made into coal gangue powder by grinding with …
Coal gangue is a mixed rock mass discharged during the construction and production of coal mines. Coal gangue can be made into coal gangue powder by grinding with …
The result shows that permeability parameter k of crushed rock has a polynomial relationship with effective stress σ′ in inverse proportion, and permeability parameter β of crushed gangue has power exponent relationship …
The results show that: (1) the bearing capacity of crushed gangue materials increases with the increase of confining pressure; (2) the block aggregate in the gangue sample is gradually compacted ...
Consequently, gangue waste piles have become one of the main sources of environmental pollution [8], [9]. To improve the mining environment and safety, gangue backfilling is widely applied [10], [11]. As a primary type of backfilling material, broken coal gangue is gradually compacted by overlying strata when backfilled into the mining goaf.
The crushed gangue materials which are filled into the goaf in solid-backfilling coal mining become the main body of bearing the overburden after the tamping process. Its resistance to deformation is … Expand. 17 [PDF] Save.
The stability of the gangue rib and the movement of the overlying strata are significantly influenced by the compressive deformation characteristics of crushed stones. In this research, a large gangue rib similar compression device was designed to perform compression tests on gravel of different particle sizes.
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The surface morphology of compacted and crushed gangue presents self-similarity and other fractal characteristics. This research constructed a fractal model for the particle size of compacted and crushed gangue based on fractal theory and particle size distribution information. To investigate the fractal characteristics of compacted gangue, compaction experiments were …
To study the compaction and re-crushing characteristics of the gangue particles, continuous grading and intermittent grading of two different structures were designed to study …
mineral processing, art of treating crude ores and mineral products in order to separate the valuable minerals from the waste rock, or gangue. It is the first process that most ores undergo after mining in order to provide a more concentrated material for the procedures of extractive metallurgy.The primary operations are comminution and concentration, but there are other …
The crushed gangue materials which are filled into the goaf in solid-backfilling coal mining become the main body of bearing the overburden after the tamping process. Its resistance to deformation is the key to control overburden movement and surface subsidence. Particle breakage affects the resistance to deformation of filling materials. In this paper, a confined …
Compaction properties of the backfill body are the key to reveal the law of roof subsidence and illustrate the mechanism of ground pressure control with gangue backfill mining. A rock mechanic testing machine and a self-designed steel cylinder were applied to conduct compaction experiments of gangue with different particle sizes, axial stresses, loading rates …
The result shows that permeability parameter k of crushed rock has a polynomial relationship with effective stress σ′ in inverse proportion, and permeability parameter β of crushed gangue has power exponent relationship with effective stress σ′ increasing in direct proportion. The particle size of 8.0–10.0 mm has a good support effect.
Xu [9] used crushed gangue, limestone, and gypsum as the main materials and fluorite and barite as the secondary materials and prepared an alite-sulfoaluminate cement at 1330 C.
To study the deformation characteristics of crushed gangue under different water content conditions, the confined compaction test of crushed gangue was carried out under five different water ...
gangue in the goaf is gradually compressed under the load of the overburden, and the bearing-compression performance of the gangue accumulation is an important factor aecting the control eect of surface subsidence [, 67]. The shape characteristics of the gangue blocks greatly aect the occlu-sion and the crushing of gangue, which further aects the
1 Coal gangue is crushed by a jaw crusher and ground by a ball mill. Raw materials are screened using a 100-mesh vibrating screen. 2 Mix raw materials (55% coal gangue and 45% iron tailings) to make particles with a …
Crushed gangue models were made by gangue block containing single shape blocks or mixed-shape blocks. The influence of block shape on the macro deformation response and meso-fabric evolution of crushed gangue under triaxial compression was studied. The main conclusions are as follows: Li et al. (2020a) [1] the more irregular the block shape ...
The change rules of crushing ratio and newly added fine particle content with the cyclic loading times were similar. This is due to that the crushing forms of the gangue block in CGPM samples are mainly edges fracture and corners fracture. In this two crushing forms, gangue blocks in CGPM are mostly crushed into fine particles (0–10 mm).
The coal gangue crusher produced by SMMVIK Machinery has the characteristics of large crushing ratio, high efficiency, less energy consumption, uniform product particle size and …
equipment[24–26]. Scholars have proposed a characterization method for fractal characteristics used to ... When measuring the breakage density of the crushed gangue body, plastic lm is used to ...
We can provide you the complete Gangue beneficiation plant. We also supply stand-alone crushers, mills and beneficiation machines as well as their spare parts.
crushed gangue under di erent loading rates was designed, and the acoustic emission (AE) signal ... The test used two sets of equipment: a loading control system and an AE-monitoring system.
There are several types of crushers that can be used for coal gangue crushing, including jaw crushers, impact crushers, cone crushers, and hammer crushers. Each type of crusher has its …
The crushed gangue is then transferred to the screening machine by the forklift for screening. ... Firstly,using quantitative feeding equipment, the finished gangue from the storage bin is ...
The gangue samples used in the simulation test were taken from Fuxin Mining Group. The gangue is crushed and screened by the jaw crusher, as shown in Fig. 5. The remaining particle size was ...
Semantic Scholar extracted view of "Triax1al Testing with Large-Scale High Pressure Equipment" by E. Hall et al. Skip to search form Skip to main content Skip to account menu ... (SBCM), the crushed gangue backfilling material (CGBM) is generally compacted circularly by a compaction machine in order to reduce its compressibility. In this
loss and pore pressure of crushed gangue during the seepage are tested. The result shows that permeability parameter k of crushed rock has a polynomial relationship with effective stress s0 in inverse proportion, and permeability parameter b of crushed gangue has power exponent relationship with effective stress s0 increasing in direct ...
dissipation of crushed gangue under actual mining stress. Authors consider the actual mining stress state in goaf to design the experiments depending on the background of gangue backll in the Renjiazhuang Coal Mine. The energy dissipation of crushed gangue was also analyzed, because gangue backfill controls the dynamic pressure through the
Sustainability 2023, 15, 6353 3 of 14 2.2. Test Apparatus and Procedure The model of the ball mill used in the test was a SM'500 500 mm test mill (Figure2), the power of the equipment was 1.5 kW ...
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