MTW European Type Trapezium Mill
Input size:30-50mm
Capacity: 3-50t/h
LM Vertical Roller Mill
Input size:38-65mm
Capacity: 13-70t/h
Raymond Mill
Input size:20-30mm
Capacity: 0.8-9.5t/h
Sand powder vertical mill
Input size:30-55mm
Capacity: 30-900t/h
LUM series superfine vertical roller grinding mill
Input size:10-20mm
Capacity: 5-18t/h
MW Micro Powder Mill
Input size:≤20mm
Capacity: 0.5-12t/h
LM Vertical Slag Mill
Input size:38-65mm
Capacity: 7-100t/h
LM Vertical Coal Mill
Input size:≤50mm
Capacity: 5-100t/h
TGM Trapezium Mill
Input size:25-40mm
Capacity: 3-36t/h
MB5X Pendulum Roller Grinding Mill
Input size:25-55mm
Capacity: 4-100t/h
Straight-Through Centrifugal Mill
Input size:30-40mm
Capacity: 15-45t/h
Coal gangue to sulfur concentrate
Representative coal gangue in China: Physical and chemical
2024年2月1日 Based on the source and distribution of coal gangue (CG) in China, this study introduces the current situation of CG storage in China and the problems existing in the 2023年8月31日 For coal gangue with a sulfur content greater than 6%, if the sulfur in it exists in the form of pyrite and is in the form of nodules or agglomerates, the sulfur concentrate can be recovered by washing separationHow to Recycle and Process Coal Gangue: 7 Effective 2021年3月15日 The feasibility of extracting valuable metals from coal gangue is verified The grade and recovery of direct reduction iron increased with the increase of the reductant Study on the factors affecting the deep reduction of coal gangue 2024年9月7日 The direct application of raw coal gangue faces challenges of low active beneficial ingredients, inadequate water and fertilizer retention, presence of potentially toxic Opportunities, challenges and modification methods of coal
Separation and Recovery of Valuable Carbon ACS
2024年3月13日 Coal gangue (CG), an industrial solid waste with high contents of Li and Ga, has attracted the attention of researchers However, the utilization of CG remains an economic challenge Preenrichment of Li and Ga by flotation 2024年5月11日 To investigate the influence of particle size distribution on the jig separation of pyrite in finegrade coal gangue, the raw material was crushed to less than 2 mm using a jaw crusher and subsequently sieved to obtain its Study on the Influence of Particle Size Distribution on 2021年3月11日 In this study, the leaching and precipitation characteristics of heavy metals in lowsulfur coal gangue under different environmental conditions were simulated by indoor Characteristics of leaching of heavy metals from lowsulfur coal Starting from the resource characteristics of coal gangue, this paper systematically discusses the ways and research status of coal gangue resource utilization, mainly including: extracting and recovering useful components such Research Progress on Comprehensive Utilization of
Characteristics of leaching of heavy metals from lowsulfur coal gangue
Characteristics of leaching of heavy metals from lowsulfur coal gangue under different conditions Chang Li1,2 • Liugen Zheng1,2 • Chunlu Jiang1,2 • Xing Chen1,2 • Shuaishuai Ding1,2 2024年5月11日 Coal gangue is a solid waste generated during coal mining [], characterized by its low carbon content, which leads to a range of environmental issues due to its limited utilization and extensive accumulation Study on the Influence of Particle Size Distribution on 2017年12月20日 Coal gangue is one of the largest industrial residues It has high ash content, low carbonaceous content, and heating value Meanwhile, it has some trace elements Large quantities of coal gangue cause serious environmental problems by polluting the air, water, and soil as well as occupying a tremendous amount of land Now, coal gangue utilization is a Trace Elements in Coal Gangue: A Review IntechOpen2021年3月11日 Coal gangue is the main pollution source of mining areas When coal gangue is stacked and recycled, the heavy metal elements contained in it are released by natural weathering and leaching, which causes damage to the surrounding ecological environment In this study, the leaching and precipitation characteristics of heavy metals in lowsulfur coal gangue Characteristics of leaching of heavy metals from lowsulfur coal gangue
Pyrite Transformation and Sulfur Dioxide Release during Calcination
2014年8月11日 Results show that although sulfur in coal gangue mainly exists in the form of pyrite, while the COD in flotation concentrate is 3533 μg/g, and can be reduced to 290 μg/g at 450 °C, 2024年8月10日 Coal gangue (CG) is a solid waste generated during coal mining, washing and processing, accounting for 15–20% of coal production It is considered one of the largest industrial solid wastes in terms of discharge and accumulation amounts (Wu et al, 2017)As the world's largest coal producer, China had accumulated over 7 billion tons of coal gangue by 2022 Simultaneous nutrients activation and pollutants removal of coal gangue release of heavy metals in lowsulfur coal gangue; and more precipitation is associated with better release of heavy metals from the lowsulfur coal gangue Keywords Coal gangue Leaching Heavy metal Leaching rate 1 Introduction Coal gangue is an industrial solid waste inevitably produced in coal mining and coal washing, and its emissionsCharacteristics of leaching of heavy metals from lowsulfur coal gangue 2017年8月22日 Wang SB, Luo KL, Wang X, Sun YZ (2016) Estimate of sulfur, arsenic, mercury, fluorine emissions due to spontaneous combustion of coal gangue: An important part of Chinese emission inventories Environ Pollut 209:107–113 Article Google Scholar WHO (2002) Fluorides Environmental health criteria, vol 227Thermal effect on fluorine emission in coal and clay minerals
Lowcarbon utilization of coal gangue under the carbon
2023年5月25日 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 and harmful organic substances in 2024年7月1日 And its sulfur content was too low to be used for sulfur recovery 20, 30, 40, 50, and 60 min And the ratio of ironrich red mud to coal gangue was 7:3 Iron concentrate and Albearing products were obtained by grinding and magnetic separation (The magnetic intensity of a magnetic separator tube was 132 kAm −1) for reduced Separate recycling of iron and aluminum from ironrich red mud by coal gangue minerals were mica, chlorite, feldspar, and calcite in Co‐bearing sulfur concentrate The results show that cobalt is transformed from Co‐pyrite and linneite to a Co 2 FeO 4 Extraction of Cobalt and Iron from Refractory Co‐Bearing Sulfur Coal gangue, a byproduct 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 coalganguebased silicon fertilizer was studied using XRD and FTIR Sustainable and clean utilization of coal gangue: activation and
Preparation of highsulfur coal gangue fertilizer by bacillus
2014年2月18日 As the abundant dumped coal gangue has caused serious environmental pollution,in order to explore the utilization of highsulfur coal gangue, we studied the production of highsulfur coal gangue fertilizer by bacillus megaterium To obtain the best conditions for production of fertilizer, the factors which influenced the preparation of gangue fertilizer 2021年7月28日 Water availability seriously affects vegetation restoration in arid mining areas, and mulching is an effective way to improve soil water conditions Coal gangue occupies large swathes of land Influence of coal gangue mulching with various thicknesses and 2023年11月6日 Traditional Coal Gangue Separation Process and Equipment Water washing and dry coal preparation are the main parts of coal preparation Spiral separation, jigging, heavy medium separation, and other processes are water washing processes, which have the advantages of mature technology, high separation accuracy, and large processing capacity Full article: A review of intelligent coal gangue separation 2023年12月8日 During the extraction and processing of coal, a large amount of solid waste, collectively known as gangue, is produced This gangue has a low carbon content but a high ash content, accounting for approximately 15 to 20% of the total coal yield Before coal is used, coal and gangue must be effectively separated to reduce the gangue content in the raw coal and Coal and Gangue Classification Based on LaserInduced
(PDF) Power Generation from Coal Gangue in China
2012年7月2日 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 introducedAbstract: A cultivating indoor experiment was conducted to study the effect of highsulfur coal gangue on chemical indices (pH, EC, ESP and exchangeable Na+ ) of sodasaline soil, four kinds of fineness and four kinds of applying rates were used The results showed that 70 mesh highsulfur coal gangue had the best effect, the pH value decreased by 666%, 1120%, 1467% Improving Effect of Highsulfur Coal Gangue on Sodasaline Soilcoal industry5,6 Froth flotationis widely used for processing fine coal, utilizing the difference between the surface hydrophobicities of particles to separate coal from gangue7−9 In the flotationprocess, hydrophobic particles are expected to attach to the bubble surface and floatto form a froth layer,Associations of Gangue Minerals in Coal Flotation Tailing and Besides, coal gangue contains a large number of aluminumsilicate minerals, which are advantageous to the quality of brick and cement [11−12] Ammonium sulfate is also produced from coal gangue with high pyrite content by a roastingsoakingneutralization process High Al containing coal gangue can be used to produce aluminumConversion of coal gangue into alumina, tobermorite and TiO
A novel dry beneficiation technology for pyrite recovery from
2018年1月20日 The pyrite occurrence in the high sulfur gangue with >6 mm and 6 mm was mainly consisted of gangue, pyrite and low density coal Pyrite with form of flake and monomer occurred in the high sulfur gangueDOI: 101016/jenvpol201511026 Corpus ID: ; Estimate of sulfur, arsenic, mercury, fluorine emissions due to spontaneous combustion of coal gangue: An important part of Chinese emission inventoriesEstimate of sulfur, arsenic, mercury, fluorine emissions due to 2018年1月24日 Coal gangue contains inorganic minerals and organic Besides the conventional pollutants of sulfur and Characterization of ceramic cenosphere and salt concentrates Fuel 2004; 83 (PDF) Trace Elements in Coal Gangue: A Review2016年2月1日 Request PDF Estimate of sulfur, arsenic, mercury, fluorine emissions due to spontaneous combustion of coal gangue: An important part of Chinese emission inventories A rough estimate of the Estimate of sulfur, arsenic, mercury, fluorine emissions due to
(PDF) Sulfur Conversion of Mixed Coal and Gangue during
2020年1月23日 Limestone (CaCO3), which could promote sulfur fixation, was added to coal gangue during roasting in a circulating fluidized bed (CFB) boiler CaO and CaSO4 were the main Cabearing minerals while 2021年3月15日 Study on the factors affecting the deep reduction of coal gangue containing high contents of iron and sulfur Author links open overlay panel Hongyu Zhao 1, Yanli Chen 1, Xuqin Duan Show more After magnetic reduction of the reduced products, the iron grades and iron concentrate recovery ratio obtained were greater than 85% and Study on the factors affecting the deep reduction of coal gangue 2014年1月1日 Five coking coals are from five different mines in Kailuan coalfield, and have density −140 kg/L and size 50–05 mm and vitrinite reflectance varying from 088% to 173%, and are labeled with DK, QK, FK, ZK and LK, respectivelyThose five coking coals were sampled for the following preparation and properties tests of corresponding maceral concentratesPreparation and coking properties of coal maceral concentrates2021年3月11日 Coal gangue is the main pollution source of mining areas When coal gangue is stacked and recycled, the heavy metal elements contained in it are released by natural weathering and leaching, which Characteristics of leaching of heavy metals from lowsulfur coal gangue
Effects of a proline solution cover on the geochemical and
release of pollutants from highsulfur coal gangue Highsulfur coal gangue was continuously immersed in a proline solution and in deionized water (as a control treatment) for 540 days The results showed that the coal gangue in the control treatment was oxidized and generated leachate with poor water qualities, ie, the leachate exhibited 2024年10月3日 Haireng et al [7] discovered that highsulfur coal gangue, when applied to alkaline soils, could neutralize soil bases, lower pH, and contribute to improved crop growth and stable yields The accumulation of coal gangue not only consumes land resources but also negatively impacts the mining areas ecological environment [8]Progress in the utilization of coal gangue for soilification and the 2021年10月18日 A coal gangue image recognition method based on complex conditions is proposed to address the current issue of imagebased coal gangue recognition being greatly affected by complex conditions(PDF) Using Deep Convolutional Neural Networks 2021年8月2日 Coal gangue is a type of solid waste produced in the coal mining and washing processes The global coal mining industry produces approximately 350 million tons of inactive gangue each year, and the accumulated coal gangue in China alone amounts to 60 billion tons [1], [2], [3]In Spain, about 2 million tons of coal mine waste were produced in 2009Effect and mechanism of coal gangue concrete ScienceDirect
Enrichment and response of ironmetabolizing microorganisms
2023年4月13日 In the Xishan coalfield of northern China, the stratified stacking of soil and gangue was applied to limit the acid pollution from highsulfur coal gangue In this study, we found that stratified stacking can effectively neutralize the acidity, with the pH value of gangueleaching water being 602–813 In contrast to the acidic contaminated area, most of the 2022年11月25日 China’s total coal production in 2021 exceeded 413 billion tons, 52% of the world’s total Coal gangue, a solid waste of coal mining accounts for 15–20% of coal production, when directly discharged on the ground surface as waste heaps, it occupies large areas of land and cause environmental pollution This paper summarizes the existing gangue backfilling Underground Disposal of Coal Gangue Backfill in China MDPI2021年9月26日 After continuous leaching by the mixed culture, the total sulfur, pyrite sulfur and sulfate sulfur in coal gangue decreased from 206% to 118%, 066% to 014% and 102% to 052%Bioleaching Coal Gangue with a Mixed Culture of Acidithiobacillus 2016年1月1日 Iron ore having highsulfur content causes problems in the concentrate production, pelletizing, and steelmaking processes and environmental issues such as sulfur dioxide emission during the Removal of sulfur and phosphorous from iron ore concentrate by leaching
The Aggoflotation of a Mixture of Subbituminous Coal and Gangue
2010年4月26日 The aim of this study was to study aggloflotation of a mixture of subbituminous coal and gangue minerals using Şirnak asphaltite and concentrate obtained from Zonguldak bituminous coal2024年1月18日 Coal: One of the main components of coal gangue is coal itself, including different types of coal, such as stone coal, lignite, anthracite, etc Rock: Coal gangue usually contains a large amount of rockThese rocks may be rock layers above and below the coal seam or other stones in the deposit Pyrite: As you mentioned, coal gangue may contain pyrite, a Coal Gangue: Composition, Processing, Use And Recycling2016年12月10日 In the case of the compound dry cleaning apparatus, a concentrate with a lower sulfur content is found near the feed end, This indicates that as the amplitude increases, a portion of the separated lowsulfurcontent coal and highsulfurcontent gangue is not timely discharged and mixed into the following separation regionEffect of vibration on the separation efficiency of highsulfur coal