— The gangue was collected after washing raw coal on the surface of Yungang coal mine in Datong Shanxi Province China and then crushed and sieved to 200 mesh multifunctional crusher YB 2000A and desiccated at 70 °C for 24 h blast drying oven BGZ 140 to produce a specimen named pretreatment gangue as shown in Fig
— Natural coal gangue is activated by alkaline supercritical water SCW cancrinite and kalsilite obtained at 400 °C had higher activity for mercury removal from coal derived gas than the raw coal fly ash [42] Based on previous literature SCW is a feasible method for releasing inorganic ions from degradable industrial solid waste and
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— The calorific value of coal gangue refers to the amount of energy that can be released from complete combustion of coal gangue per unit mass under certain conditions and it usually increases with increasing carbon mass fraction and volatile fraction and decreases with increasing ash fraction [24] The meltability of coal gangue refers to the
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— We developed a new calcination method to convert coal gangue CG a common waste generated from coal production process into a modified form which could be used as an adsorbent to remove Mn 2 from aqueous solution Sodium tetraborate Na 2 B 4 O 7 ·10H 2 O was added into the CG calcination process as an additive and the
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— 1 Introduction Coal gangue is an undesired but inevitable by product emitted during coal mining and processing accounting for approximately 10 % 15 % of the raw coal output [1] In 2020 China s coal gangue output exceeded 400 million tons [2] Currently the accumulated coal gangue stockpile in China is 6 billion tons [3] Coal
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— Coal gangue used in this study was obtained from JingYang Coal Washing Plant which is located in Baotou City of China The mineralogical phase was characterized by XRD as shown in Fig indicates kaolinite Al 2 O 3 ·2SiO 2 ·2H 2 O and quartz SiO 2 are the major crystallized minerals presented in the raw coal chemical
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— Pyrite FeS 2 exists in considerable amounts in coal and is a ubiquitous color causing impurity in kaolinitic coal gangue after calcination; the reaction was so slow that no significant gas evolution was Adsorption removal of cationic dyes from aqueous solutions using ceramic adsorbents prepared from industrial waste coal gangue J
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— 1 Introduction Coal gangue is a by product of coal mining and washing process Li et al 2006 In China there are 5 billion tons of coal gangue accumulated as residual waste and this value continues to grow at the rate of 300 350 tons per year Li and Wang 2019; Moghadam et al 2019 Large amount of coal gangue not only occupies
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Coal gangue is an associated resource of complex industrial solid waste discharged when coal mining and washing in the production course [1 2] The amount of coal gangue has already accumulated billion tons and increasing at a rate of billion tons per year in China which has caused many serious environmental problems [3 4] In recent years
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— We developed a new calcination method to convert coal gangue CG a common waste generated from coal production process into a modified form which could be used as an adsorbent to remove Mn 2
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— Critical metallic elements in coal gangue have great utilization potential especially due to the current shortage of these metals This paper focused on examining the feasibility of physical separation screening and float sink tests and calcination treatment for the enrichment of critical elements Li Ga and rare earth elements plus yttrium REY
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— Coal gangue was calcinated under air nitrogen carbon dioxide air hydrogen and hydrogen atmospheres The effects of different calcination temperatures and atmospheres on the mineral composition of activated coal gangue were investigated by X ray diffraction Moreover the acid leaching kinetics of aluminum oxide from coal
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— The ceramsite was prepared by using Bayan Obo tailings and blast furnace slag of Baotou Steel as the main raw materials and coal gangue as pore forming agent and the process system and the performance of ceramsite were optimized The phase transformation rules of the ceramsite prepared by multi source solid waste in sintering
— In addition the recent applications of various types of zeolite materials in wastewater waste gas agriculture etc are also reviewed more comprehensively Proofing the presence of metal oxide impregnated into zeolite A without calcination XRD and FTIR studies Synthesis of Na A zeolite from coal gangue with the in situ
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