In the process of coal resource mining and consumption utilization, a large amount of coal gangue solid waste is accompanied 1,2.At present, the western mining area has become the main production ...
To reveal how CaF2 improves the dissolution ratios of aluminum and iron ions in coal gangue, CaF2 and hydrochloric acid are used to extract Al3+ and Fe3+ from the coal gangue calcined powder.
1. Introduction. Separation of coal and gangue is the key to efficient and clean utilization of coal [1].In this context, mineral sorting technology based on computer vision has been the focus of research in recent years [2].The use of image processing to recognize coal and gangue is safer and more convenient than traditional coal washing …
Coal gangue is the rock trapped in the coal seam, and it is also the waste in the process of coal mining and coal washing. At present, the accumulated coal gangue in the country is as high as several billion …
The coal-based kaolin, also known as coal gangue, is a solid waste discharged in the process of coal mining and coal washing, or an ore with lower carbon content and harder than coal near coal ...
To achieve environmental sustainability and improve material characteristics, this study examines the performance of self-compacting concrete (SCC) that incorporates different industrial by-products, including fly ash (FA), coal gangue powder (CGP), cement kiln dust (CKD), and recycled concrete powder (RCP).
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 …
Coal gangue is a fixed coal mining, washing, and processing product. It is a black-gray rock with lower carbon content and harder than coal associated with coal seams during the coal formation …
solid wastes, coal gangue has a huge production volume, with an average of 10% to 20% of coal gangue produced for every 1 ton of coal. In 2021, China ' s coal gangue production reached ...
Coal gangue is one of the largest mine solid wastes in China, and its discharge and stockpiling have caused resource waste, environmental pollution and other problems. Starting from the resource characteristics of coal gangue, this paper systematically discusses the ways and research status of coal gangue resource …
We have developed compact coal gangue sorting devices, expanded conveyor belt sorting systems, and underground coal gangue separation systems based …
The selection of coal crushing equipment mainly depends on the input size of raw coal, the moisture of the coal, and the production scale (output) of the plant. Of course, the output size and the final use of coal also need to be considered, such as 0-25 mm for gas furnaces, 8-25 mm for steam locomotives, 6-25 mm for industrial furnaces, and 0 ...
1. Introduction. Currently, coal is still one of the main energy sources in many countries. According to statistics, the consumption of coal in the world in 2015 was 550 million tons, accounting for more than 19% of the world's primary energy (Li and Wang, 2019).However, coal gangue (CG) is a solid waste discharged during coal mining and …
Conventional coal gangue separation equipment, such as spiral separation equipment, heavy medium shallow trough separation equipment, and TBS interference …
In this paper, an intelligent identification method of gangue based on polarization imaging technology is proposed. Firstly, a gangue image acquisition system was built in the laboratory, and 2000 groups of coal and gangue samples were collected, including polarization intensity images, polarization angle images and polarization …
The mineral of coal gangue is mainly kaolinite, which can be used as mineral admixture after activation. In order to study the effect of coal gangue on the hydration process of concrete, 20% coal gangue powder was used to replace cement to …
Gangue, a typical waste associated with the coal mining process in northern China, was characterized before and after thermal treatment by XRF, XRD, TGA-DSC, and SEM. The pozzolanic reactivity of calcined gangue with different calcined temperature was tested by...
In order to solve the problem of coal gangue accumulation, find ways to extract the additional utilization value of coal gangue, and "turn waste into treasure" to the maximum extent, many researchers have modified coal gangue to increase its activity, making it a material with various high Value-added environmentally friendly materials solve the …
The crude material is transferred to another off-site processing plant that smelts or refines the mineral ore into the final raw material. Copper and gold concentrate. Mineral Processing Equipment. Below is a list of …
Coal gangue is a kind of solid waste. A high-ductility cement-calcined coal-gangue-powder-composite-based rapid repair material (HD-RRM) was prepared by partially replacing cement with calcined coal gangue powder (CCGP) for achieving high ductility and rapid hardening and conforming to the strength requirements of pavement …
Coal gangue is a solid waste discharged during coal mining and coal washing. The processing equipment usually used includes jaw crushers, impact …
1. Introduction. Coal gangue (CG) is a byproduct of coal mining, washing and beneficiation processes, accounting for approximately 15–20% of coal production [1], [2], [3].With advancing industrialization and urbanization worldwide, the stockpile of CG in China has surpassed 7 billion tonnes, making it the largest industrial solid waste [4], [5], [6], [7].
Traditional coal-gangue recognition methods usually do not consider the impact of equipment noise, which severely limits its adaptability and recognition accuracy. This paper mainly studies the ...
DOI: 10.1016/j.powtec.2020.08.088 Corpus ID: 225031397; Cascade network for detection of coal and gangue in the production context @article{Lv2021CascadeNF, title={Cascade network for detection of coal and gangue in the production context}, author={Ziqi Lv and Weidong Wang and Zhiqiang Xu and Kanghui Zhang and Haimei Lv}, journal={Powder …
Coal gangue is a solid waste discharged from the coal mining process and coal washing process. Coal gangue can be divided into 6 types according to the output method: rock lane gangue, coal …
Coal gangue produced in the process of coal mining accounts for about 10% ∼ 25% of the total [1]. With the increase of coal mining volume year by year, the coal gangue produced by coal mining ...
Coal gangue is the largest amount of industrial solid waste in China. ... LI JH.Synthesis of Na-A Zeolite from coal gangue with the In-situ crystallization technique[J]. Advanced powder technology, 2015, 26(1):98-104. doi: 10.1016/j.apt.2014 ... Process flowchart of the production of cement with coal gangue. Figure 2. Process flowchart of …
Microwave heating is an effective method to achieve autonomic crack healing in asphalt mixtures, and the use of microwave-absorbing materials can largely improve this healing efficiency. As a solid waste, coal gangue contains metal oxides, which shows the possibility of microwave heating. In order to further promote the application of …
Coal gangue powder air classifier production line of a paper mill in Shanxi In response to the national call of green environmental protection and recycling, the customer is ready to use stone paper, and wants to seek the processing technology of …
The interaction process between coal gangue slurry and goaf voids can be divided into three stages: initial flow, vertical flow, and horizontal diffusion. ... The gangue powder was then fed into ...
Preparation process before separation. Including copper ore crushing, screening, grinding, grading and other processes. The purpose of this process is to separate useful minerals from gangue mineral monomers, and to dissociate various useful minerals from each other 1. Crushing process The copper ore that needs to be …
The amount of coal gangue, a by-product of coal mining and washing, is rapidly increasing with the growing trend of energy consumption. The accumulated coal …
The characteristics of raw materials used in the test, such as cement, CGP and coal gangue, are shown in Table 1.In this experiment, the coal gangue produced by Zhang Jiamao coal mine in Shenmu City, Shaanxi Province is selected, and the XRD-7000L X-ray diffractometer was used to obtain the mineral composition analysis of coal …
