(PDF) Comminution in mineral processing
purposes (Clarence H. Lorig, March 2017) (DRZYMALA, 2007). ... being crushed into intermediate size from its originally huge size. ... agglomeration surrounded by waste and gangue mineral ...
Study on the Optimization of Proportion of Fly Ash-Based …
In order to solve the problem of the high cost of coal-based solid waste bulk stacking and paste filling in the large-scale coal electrification base in East NingXia, in this study, fly ash is skillfully used to replace the broken coal gangue as the mixed filling material. As using a jaw crusher for crushing large coal gangue is expensive, and its energy consumption is …
Transparent characterization and quantitative analysis of broken gangue
For this purpose, a total of 30 concrete mixtures were designed by the inclusion of 0%, 25%, 50%, 75% and coal gangue as coarse aggregates and 0%, 10% and 20% metakaolin as binder at 0.55 and ...
Prediction of compression and deformation behaviours of gangue …
Coal mining causes serious ecological and environmental damage. The crushed gangue is backfilled into underground goaf, which not only inhibits mining-induced subsidence but also reduces accumulation of waste on the ground: however, the effects of backfilling with gangue backfill materials in goaf are affected by a combination of multiple factors. To predict …
Experimental Study on Confined Compaction Deformation of Crushed Gangue …
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 content conditions by using a universal material testing machine and a compaction device. The strain–stress relationship in the compaction process of crushed gangue and the …
The 3D reconstruction of a digital model for irregular …
dination structure of crushed gangue materials is inuenced and the occlusive eect, intercalation and stress concentra-tion of gangue blocks are signicantly changed during the loading and compression. Furthermore, the overall engineer - ing mechanical properties of crushed gangue materials are affected. At present, scholars at home and abroad ...
Effects of Water Soaked Height on the Deformation and …
The main purpose is to stabilize the overlying strata and reduce surface subsidence in the process of recovering coal reserves that are located under buildings, railways, and water bodies, thus reducing piled gangue on the surface and the environmental pollution. ... whose lithology is sandstone. The gangue was first crushed by a crusher and ...
Experimental Study on Acoustic Emission of Confined …
crushed gangue under di erent loading rates was designed, and the acoustic emission (AE) signal was monitored in the process of confined compression. The test results showed that with the increase
Compaction characteristics and energy dissipation of …
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 …
Compaction characteristics and energy dissipation of crushed gangue …
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 ...
Study on the propagation characteristics of methane-air
The explosion scene in gob was simplified and the position of the crushed gangue from the ignition source was set to 0.5 m, the actual setup is shown in Fig. 3.The gangue used in the experiments ...
Coal Gangue: Composition, Processing, Use And Recycling
Coal gangue power generation Coal gangue grinding adopts fluidized bed technology. When the carbon content is greater than 20%, it can be used as energy and can be used to generate electricity. Recycling of coal and pyrite Coal gangue adopts composite dry coal preparation, cyclone, and heavy medium separation. When the coal content exceeds 20%, …
How to Recycle and Process Coal Gangue: 7 …
Innovations in pavement technology lead to the incorporation of coal gangue (especially high content of kaolinite and illite) into asphalt mixtures, making it a good roadbed material. The coal gangue is crushed and …
Study of the Internal Rebreaking Characteristics of Crushed …
The gangues in mine goaf have two characteristics: (1) the particle size of the gangue increases from bottom to top, and it is not a single particle size distribution, but a …
Excess sulfur and Fe elements drive changes in soil and
Coal gangue piles accumulate outside mines and can persist for years, negatively impacting the regional environment. To determine the main cause of soil pollution at coal gangues, several coal ...
Copper Mining and Processing: Processing Copper Ores
After the copper ore is crushed, liquid is added to make it a slurry. The slurry is a mix of valuable copper ore minerals and "worthless" rock, called gangue (pronounced "gang"). The slurry is placed in a tank and a process called froth floatation is used to separate the copper minerals from the gangue. Chemical reagents called ...
The distribution discipline of impact crushed on coal and gangue
The impacting crusher was used to impact crushing test on coal and gangue from three mining with different impact velocity.The distribution function of coal and gangue,the influence of the impact velocity and the hardness of coal and gangue on the distribution function were got from the data fitting of experimental results.The results show that:Weibull distribution can descript …
Effects of particle size of crushed gangue backfill …
Effects of particle size of crushed gangue backfill materials on surface subsidence and its application under buildings Meng Li1 • Jixiong Zhang1 • Yanli Huang1 • Nan Zhou1 Received: 5 August 2016/Accepted: 18 August 2017/Published online: 30 August 2017 Springer-Verlag Germany 2017 Abstract In recent years, solid waste backfill ...
Fractal characteristics of crushed particles of coal gangue …
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 …
[PDF] Effects of Water Immersion on the Long-Term Bearing
DOI: 10.1155/2021/6675984 Corpus ID: 233708259; Effects of Water Immersion on the Long-Term Bearing Characteristics of Crushed Gangue in Goaf @article{Jiang2021EffectsOW, title={Effects of Water Immersion on the Long-Term Bearing Characteristics of Crushed Gangue in Goaf}, author={Ning Jiang and Dawei Yin and Junbiao Ma and Liu Han and Haiyang Pan …
Experimental Study on Acoustic Emission of …
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 …
Study on compaction characteristics and mechanical model …
An interaction model of the crushed gangue and the rock pillar in the gob during the bearing process was established, yielding the relationship between the deformation modulus of the two. This has ...
Characterizations of macroscopic deformation and particle …
An equation for predicting stress-strain relationship during compression-induced deformation of gangue backfill materials under multi-factor coupling effects was established and shows that this equation can predict compression- induced deformation in goaf, beneficial to providing a basis for predicting strata movement and surface subsidence and guidance for …
Copper Mining and Processing: Processing Copper …
After the copper ore is crushed, liquid is added to make it a slurry. The slurry is a mix of valuable copper ore minerals and "worthless" rock, called gangue (pronounced "gang"). The slurry is placed in a tank and a process …
Desliming
The purpose of desliming is to dissociate and disperse the fine slime mixed in and attached to coarse ore grains and the agglomeration of fine slime, so as to remove the slime. ... magnetic dewatering tank is used to remove the fine gangue grains, which is important for improving the technical indicators of production of beneficiation plant ...
Compressive deformation and energy dissipation of crushed …
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 …
Particle Crushing and Morphology Evolution of Saturated …
In this research, the deformation, particle crushing, and morphology evolution of saturated crushed gangue under variable axial stresses (0, 2, 4, 8, 12, 16, and 20 MPa) were …
Influences of water filling timing on the deformation …
Based on the analysis of the crushed gangue deformation at different water filling stages, the effects of cumulative crushing in the upper layer and concentrated filling in the lower layer can be observed, as shown in Figs. 9 (b) and 11. Due to the decrease in stress exerted by the loading head on the crushed gangue with increasing depth, the ...
OPEN Microscopic fabric evolution and macroscopic …
the crushed gangue accumulated on the ground of mining areas in China has exceeded 6 billion tons, becoming the largest industrial solid waste in China 1–3 . e accumulation of crushed gangue on ...
Research and engineering practice on space characteristics of gangue
Due to different backfilling purposes, slurry backfilling differs from paste backfilling. ... The gangue was crushed into gangue powder through multiple stages of crushing and screening. Before ...