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Sustainable and clean utilization of coal gangue: activation …

Coal gangue, a by-product produced during the coal processing, has a serious impact on the environment. Using coal gangue as a fertilizer has been proven helpful in potentially reducing its environmental impact and improving its value. In this study, the formation mechanism and influencing factors of coal-gangue-based silicon fertilizer was studied …

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Sustainable and clean utilization of coal gangue: …

coal-gangue-based silicon fertilizer, and its reliability veri-ed, thereby providing a theoretical basis for use of coal-gangue-based silicon fertilizer in agriculture. Materials and methods Materials Coal gangue The coal gangue used in the experiment comes from the Shendong mining area in Inner Mongolia, China, with an ash content of~ 85.60%.

Activation Mechanism of Coal Gangue and Its Impact on the …

In order to obtain the geopolymer of coal gangue with good strength, the content of coal gangue is 50–60%, and grinding or calcination is required, which greatly increases the economic cost and reduces the utilization rate of coal gangue. Table 3. Polymer strength of CG in different literature.

Comprehensive utilization and environmental risks of coal gangue: A

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 gangue without appropriate utilization has resulted in a squander of resources, waste disposal and environmental pollution issues. Over the past few decades, there has been …

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Ore vs. Gangue — What's the Difference?

In mining, gangue is the commercially worthless material that surrounds, or is closely mixed with, a wanted mineral in an ore deposit. It is thus distinct from overburden, which is the waste rock or materials overlying an ore or mineral body that are displaced during mining without being processed, and from tailings, which is rock already stripped …

Reactivity activation of waste coal gangue and its impact …

Scanning electron micrograph (SEM) images (Fig. 4) show coal gangue particles during grinding from 2 to 20 h at two scales (1 μm and 10 μm). After 2 h of grinding, various irregular sheet- and block-shaped shapes were observed. The particle size decreased significantly and bulk density reached a maximum of 600 kg/m 3 after 10 …

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Mineral processing | Metallurgy, Crushing & Grinding

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.

Mineralogical study of a binder based on alkali-activated coal gangue …

The FTIR spectra of the raw coal gangue and the alkali-activated-coal gangue-lime (AACG-L) sample, obtained after 28 days of curing, were analyzed within the frequency range of 400–4000 cm −1, as depicted in Fig. 3.Upon examination of the spectra, a notable observation was made, the AACG-L sample exhibited a significantly more …

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Performance of microwave-activated coal gangue powder …

The coal gangue was dried, and then 500 g of the coal gangue was ground using a GJ-1000B type grinding machine for 4 min. ②. The ground powder was placed into a grinding tank with a GMB/B ball mill at a 3:1 ratio of materials and steel balls. The lid of the tank was sealed, and the grinding tank was placed on the corresponding rubber …

Analysis of Influencing Factors of Gangue Ball Milling Based …

To study the heterogeneity and local heterogeneity of gangue particle size distribution (PSD) under ball milling, gangue from northern Shaanxi coal mine was taken as a research object. The multifractal pattern of PSD and the variation trend of characteristic parameters of gangue under different ball-to-gangue ratios and grinding times were …

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Contact Supplier gangue grinder uno . meri crusher mjl1 4st . Meri crusher mj uk coal surface miningmeri crusher mj uk description : reeds construction and engineering. meri crusher finland Coal Surface Mining. Meri Crusher 31 Oct 2007 Amazing how MERI crusher grinds almost anything from small trees, stumps and branches with its extra hard ...

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UNO Online

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Using Chinese Coal Gangue as an Ecological …

Coal gangue is a kind of industrial solid waste with serious ecological and environmental implications. Producing concrete with coal gangue aggregate is one of the green sustainable development …

Entrainment of Gangue Minerals in Froth Flotation

Composite particles of gangue and value minerals are not a serious problem with coarse-grained ores because a high degree of liberation can be achieved by grinding. However, composite particles in fine-grained ores usually require ultrafine grinding to liberate value minerals from gangue minerals, a requirement that is true for …

Low-carbon utilization of coal gangue under the carbon …

The treatment and utilization of coal gangue, one of the main solid wastes produced during coal mining, are of great significance in environmental protection and resource development. In the contemporary context of the carbon neutralization strategy, due to the property of the carbon in coal gangue, it is necessary to be cautious of the …

Understanding the Entrainment Behavior of Gangue …

The single gangue mineral flotation results showed increased gangue entrainment when reducing the particle size of gangue minerals and increasing the pulp density. ... All samples were first ground in a conical ball mill using zirconia ball as the grinding medium and then divided into different size fractions, including +150 μm, −150 …

New 300X180 Stone Rock Shatter Grinder Gangue Hammer …

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Experimental Study on the Characteristics of Activated Coal Gangue …

According to the XRD spectra of raw coal gangue and mechanically activated coal gangue: (1) The intensity of the diffraction peaks at 12.46°, 24.99°, 35.11°, and 38.55° associated with the kaolinite structure decreased significantly after grinding for 2 h, became very weak after grinding for 10 h, and disappeared completely after …

Grain size and shape fractal characteristics of gangue in the …

The model of the ball mill used in this test is SMφ500×500mm test mill (Fig 3), the grinding medium is steel balls, the maximum single charge is 5 Kg, the maximum load of the grinding body is 100 Kg, the power is 1.5 kw, and the speed is 48 rpm.Rolling bearings mainly support the working principle, and the cylinder is driven to rotate through the …