· The coal gangue was pulverised and the fraction passing mm, 1 mm, and mm sieve sizes was considered for the study. The toxicity characteristic leaching procedure (TCLP) has been adopted for studying the leaching phenomenon of selected trace elements like As, Cu, Se, and Ni. The study has revealed that the rate of leaching of these ...
Gangue, also called coal gangue, is the solid waste discharged in coal mining process and coal washing process, black rock harder than coal. Its carbon content is low and exists along with coal seam. Gangue could be found in roof, bottom board, interlayer, and it could be selected in washing process.
Coal will continue to dominate China s energy supply in the future. The mining of coal creates large amount of gangue which not only occupies a large area of land but also generate environmental problems. On the other hand, coal gangue is a low calorific fuel which should be utilized properly. A few small power plants are current running or ...
1. Recovery of coal and pyrite: through simple process, good coal is washed from coal gangue, inferior coal is selected through screening, and pyrite is picked out at the same time. Or from the coal preparation of the jig plane shaker process recovery of .
Abstract: The current statistics show coal gangue discharge is 100 million tons per year, and the accumulated discharge has been as high as billion tons. It comprises the largest portion of solid waste in our country. Its storage not only requires valuable land resources, but also pollutes the air, water and soil of the storage sites ...
Coal gangue is industrial waste, and it is convenient to get nearby materials. The use of coal gangue to fill the foundation has a short construction period, low cost, and high economic benefits for areas where construction materials are not very abundant [32]. Coal gangue is a loose deposit with unique particle structure and composition. The ...
· Coal gangue is a kind of industrial solid waste with serious ecological and environmental impliions. Producing concrete with coal gangue aggregate is one of the green sustainable development requirements. This paper reviews the properties and preparation methods of Chinese gangue aggregate, studies the influence of gangue aggregate on ...
To solve the problems of the difficult feature extraction, poor feature credibility and low recognition accuracy of coal and gangue, this paper utilizes the difference in the dielectric properties of coal and gangue and in combination with a support vector machine (SVM) to propose a recognition method based on the dielectric characteristics of coal and gangue. The influence rule of the .
· 2. Impact crusher. It is often used for medium and fine crushing after middle jaw crushing. It is the secondary crushing equipment for coal gangue sand making and shaping. Users who do not have high requirements for the particle size of the finished product can only choose "jaw crushing + impact crushing" to make coal gangue into coarse sand ...
· Therefore, achieving automatic coal gangue recognition (CGR) during top coal caving is a critical issue in the intelligent LTCC of thick coal seams . To implement automatic recognition of coal and gangue, researchers have conducted extensive investigations using different methods, such as γ ray [ 5 ], radar detection [ 6 ], cutting stress analysis [ 7 ], infrared .
Coal gangue process, coal gangue crusher ... serve as cement filing materials or to generate electricity in coal gangue power plant, the coal gangue processing plant usually consists of Jaw Crusher, ...
· same time, the mined coal needs to be purified to remove rock and gangue. These two procedures are manually operated by workers in most coal mines. The realization of automatic identifiion and purifiion is not only conducive to the automation of coal mines, but also ensures the safety of workers. We discuss .
· Coal gangue is a lowcarbon, grey, or black rock rich in silica and alumina. To increase the added value of coal gangue, a variety of appliion methods have been developed. However, coal gangue utilization is still below 15% and is mostly focused on its usage as a building material. As a result, it is advantageous to design a novel and effective approach to .
· Coal gangue is one of the largest industrial wastes in China, a large number of coal gangue accumulation not only occupies too much land area, but also causes surrounding land and air pollution. In this paper, the coal gangue samples were activated at first, and then the coal gangue powder was modified by adding coal gangue powder to road asphalt with the ratio of .
· DOI: / Corpus ID: ; Classifiion of coal and gangue under multiple surface conditions via machine vision and reliefSVM article{Dou2019ClassifiionOC, title={Classifiion of coal and gangue under multiple surface conditions via machine vision and reliefSVM}, author={Dongyang Dou and Wenze Wu .
Coal gangue is an auxiliary product produced during the mining of coal resources. It has low coal content and can not be used for combustion. Its main components are clay minerals and quartz components. There are also a small amount of trace elements such as SiO2, AL2O3, and C. Coal gangue is mainly used for making ceramics, making bricks, improving soil, producing .
This paper provides an overview on the current status of power generation in China using coal gangue. The government regulation towards the use of coal gangue for power generation is introduced. Emission of pollutants and low thermal power plant efficiency are the two major problems for the power industry firing coal gangue. Particulate matter emission control is a .
Coal gangue has its unique physical structure, chemical characteristics and gangue piling, which has caused different degrees of pollution and damage to the ecological environment of the mine. Gangue pile structure is loose, unstable, and very easy to cause collapse, landslides and other natural disasters; The voidage between coal gangue is large, and its surface is in full contact .
· Coal gangue is an inevitable coal waste from coal mine, which results in serious environmental problems. Oxyfuel firing of coal waste and biomass waste is an alternative technology for efficient and clean utilization and CO 2 reduction of coal waste. In this study, the oxyfuel combustion characteristics and interactions of coal gangue and pine sawdust were .