— Coal gangue was recycled to synthesize ceramic based microwave absorbents decorated with Co particles via a facile synthesis route Co particles were uniformly loaded onto the ceramic matrix by pelletizing the gangue with concurrent spraying of a Co 2 containing solution followed by in situ carbothermal reduction using the fixed
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5 — In this study coal gangue was used as the raw material and SiC was used as the foaming agent to successfully prepare coal gangue based foamed ceramics using high temperature foaming method The results were as follows 1 The foaming process of CGFC was influenced by the oxidation reaction of SiC
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— Low density ceramic proppants were prepared from calcined flint clay and solid waste coal gangue by pelleting drying screening and sintering namely solid state sintering method The density and breakage ratio of the proppants were systematically investigated as a function of sintering temperature
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— centrifugal atomization equipment to atomize it into slurry droplets which were fed into a drying chamber at 200 Finally green coal gangue spheres were ℃ collected after spray drying Figure 2 displays morph ologies of raw coal gangue and green microspheres Coal gangue in Fig 2 a exhibits fine powder shape in
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— atmosphere It is a pity that this air pollution from coal gangue is hard to control [2 4] The gangue utilization rate of the main developed regions such as US and Europe is more than 90% In contrast that value in the largest coal gangue production country namely China is only about 60 70% while the coal gangue utilization of China
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— In 2021 China s coal gangue production reached approximately 743 million tons showing a % increase compared to 2020 Currently coal gangue has become one of the most abundant industrial solid wastes in China [2 3] In the context of the current carbon neutral era finding harmless methods to treat coal gangue and achieve its
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— Coal gangue is used to prepare flake nano mullite with a molten salt method In order to increase the utilization value corundum composite ceramics were prepared from the nanomullite and alumina
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— For the recycling and exploitation of coal industry wastes CaO Al2O3 SiO2 glass ceramics were prepared using up to 70 wt % coal gangue as the main starting materials
— This work may appeal to the practical low cost production of high performance SiC membranes Introduction However there are few reports about SiC based ceramic membrane so we choose coal gangue as sintering additive Therefore in this work coal gangue was chosen as the sintering aid in the preparation of tubular SiC
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— Low cost ceramic proppants were successfully prepared from natural bauxite and solid waste coal gangue via CaCO3 additive 40 wt% of bauxite in raw materials was replaced by coal gangue which
— Porous mullite ceramic supports for filtration membrane were successfully fabricated via recycling of coal gangue and bauxite at sintering temperatures from 1100 to 1500 °C with corn starch as pore forming dynamic sintering behaviors phase evolution shrinkage porosity and pore size gas permeation flux microstructure and
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— Coal gangue; glass ceramics; forming process; sintering process; property 1 Introduction Glass ceramics are widely used as machinable cera mics cooking ceramics building materials electrical ceramics optical materials bio ceramics glass semi conductors in thermal insulation etc [1 12] Some applications require the glass ceramics
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— Abstract Glass ceramic foams were fabricated at a relatively low temperature by incorporating coal gangue waste quartz sand and sintering additives in different proportions Sintering and the foaming behavior of the foams were studied using thermal X ray techniques and morphological characterization followed with physical and
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— Porous mullite ceramic supports for filtration membrane were successfully fabricated via recycling of coal gangue and bauxite at sintering temperatures from 1100 to 1500 °C with corn starch as pore forming dynamic sintering behaviors phase evolution shrinkage porosity and pore size gas permeation flux microstructure and
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