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
Grinding alumina using coal gangue
Kinetics of alumina extraction from coal gangue by hydrochloric
2023年6月1日 The dissolution rate of alumina can be greatly improved by adding limestone during calcination; furthermore, sodium carbonate can react with coal gangue to form 2020年4月29日 For high addedvalue utilization of alumina rich coal gangue (ARCG), a mild hydrochemical process was investigated to extract alumina (PDF) Extraction of alumina from alumina rich coal 2016年11月1日 Alumina extraction from coal gangue could offer an alternative to bauxite as a source of alumina Mechanically modification by grinding is an effective activation method to Improved extraction of alumina from coal gangue by2016年11月1日 A method that achieves higher efficiency to activate coal gangue will be essential to the industrial application for the extraction of alumina from coal gangue Improved extraction of alumina from coal gangue by surface
Extraction of alumina from alumina rich coal gangue by a hydro
For high addedvalue utilization of alumina rich coal gangue (ARCG), a mild hydrochemical process was investigated to extract alumina The influences of NaOH concentration, mass •Mechanical grinding greatly improved the alumina extraction from coal gangue•Kaolinite in coal gangue still maintained the SiOAlVIstructure without calcination•An amorphous metakaolinite Improved extraction of alumina from coal gangue by 百度学术Semantic Scholar extracted view of "Improved extraction of alumina from coal gangue by surface mechanically grinding modification" by Yanxia Guo et alImproved extraction of alumina from coal gangue by surface Alumina extraction from coal gangue could offer an alternative to bauxite as a source of alumina Mechanically modification by grinding is an effective activation method to improve alumina Improved extraction of alumina from coal gangue by surface
Alkali Methods for Alumina Extraction from the Byproducts of
2023年8月25日 Large amounts of byproducts, including coal gangue, circulating fluidized bed (CFB) slag, and coal fly ash (CFA), are generated during mining, washing and burning of high 2021年9月29日 This paper describes a novel process, hematite involved roasting − alkaline leaching − Bayer digestion, to extract silica and alumina from highalumina coal gangue (HACG) The phase transformations during roasting were investigated through Xray diffraction, Xray photoelectron spectroscopy, scanning electronic microscope, and energydispersive Comprehensive Extraction of Silica and Alumina from HighAlumina Coal 2024年9月1日 The green and efficient use of coal gangue (CG) is urgently required in the Chinese coal industry to avoid its adverse environmental impact This study proposed an Alassisted carbothermal reduction method to synthesise SiC–Al 2 O 3 ceramics using highC CG The optimised experimental conditions for sintering SiC and their effects on the phase Aluminiumassisted in situ synthesis of bulk SiC nanowhiskersalumina 2024年12月1日 This study aims to tackle the environmental pressure of spontaneous combustion coal gangue by using its active silicaalumina content to create eco grinding parameters are crucial for enhancing the reactivity and application performance of spontaneous combustion coal gangue Grinding time is a key factor affecting the powder Spontaneous combustion coal ganguebased composite cement:
Novel Process for Alumina Extraction via the Coupling Treatment of Coal
2014年3月10日 A novel process for the coupling treatment of coal gangue and red mud is reported Red mud containing 234% Al2O3, 191% SiO2, and 94% Na2O by weight was used as the blended ingredients of coal gangue for alumina extraction Calcination of coal gangue with the addition of Na2CO3 at 850 °C could obtain more than 90% of Al2O3 extraction Nevertheless, 2024年3月6日 Characterization and acid leaching of rare earth elements in coal gangue using pretreatment of selective grinding, Grinding tests of coal gangue samples were conducted to explore the effect of selective grinding on the pre Effect of Na 2 CO 3 additive on the activation of coal gangue for alumina extraction Int J Miner Characterization and acid leaching of rare earth elements in coal 2024年7月1日 The roasted product was obtained under suitable conditions of roasting temperature of 850 °C, time of 30 min, and coal gangue proportion of 30 % according to 31 Roasting effect of temperatures and time, 32 Roasting effect of coal gangue proportion Moreover, grinding products with −37 μm contents of 3138 %, 4457 %, 5533 %, 7675 %, 85 Separate recycling of iron and aluminum from ironrich red mud by coal Abstract Coal gangue, a type of kaolinite clay in coal measures, is one of the largest categories of solid industrial wastes in China Alumina extraction from coal gangue could offer an alternative to bauxite as a source of alumina Mechanically modification by grinding is an effective activation method to improve alumina recovery from coal gangueImproved extraction of alumina from coal gangue by surface
Synergistic performance of microwaveactivated coal gangue with
2024年11月1日 In recent years, Limestone Calcined Clay Cement (LC 3) [1], which primarily comprises calcined clay, limestone powder, and cement clinker, has become a focal point in the field of lowcarbon binder materials [[2], [3], [4]]The foundation of LC 3 cement lies in the synergistic interaction between calcined clay and limestone [5], allowing a clinker substitution DOI: 101016/JPOWTEC201608034 Corpus ID: ; Improved extraction of alumina from coal gangue by surface mechanically grinding modification @article{Guo2016ImprovedEO, title={Improved extraction of alumina from coal gangue by surface mechanically grinding modification}, author={Yanxia Guo and Kezhou Yan and Li Cui and Fangqin Cheng}, Improved extraction of alumina from coal gangue by surface 2021年9月1日 The coal gangue in different mining regions was sampled and analyzed The phase composition of typical high alumina coal gangue is shown in Fig 1 The main phases of coal gangue are composed of compounds containing alumina and silica, and the phases of coal gangue with different A/S are slightly differentMineral phase transformation in coal gangue by high temperature Coal gangue is an industrial solid waste produced by coal mining and processing [1–3] The average production of gangue accounts for 10–15% of raw coal production [4,5], making coal gangue one of the biggest solid wastes in China At present, utilization ratio of coal gangue can reach about 60% in some countries There are stillExtraction of alumina from alumina rich coal gangue by a hydro
Extraction of alumina from alumina rich coal gangue
2020年4月29日 1 Introduction Coal gangue is an industrial solid waste produced by coal mining and processing [1–3]The average production of gangue accounts for 10–15% of raw coal production [4,5], making coal gangue one of 2019年12月1日 The amount of coal gangue, a byproduct 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 wide attention in developing Comprehensive utilization and environmental risks of coal gangue: A 2024年11月15日 In this study, a beliteye’elimiteternesite cement clinker was prepared using coal gangue, carbide slag, and desulfurization gypsum instead of nonrenewable resources The evolution law of the silicaalumina mineral phase in cement clinker under different calcining temperatures was tested and analysedMicrostructural characteristics of aluminosilicate minerals in 2024年2月1日 All the CGs in the figure are dried in an oven at 60 °C and ground CG1 is Hebei coal gangue, which comes from a coal gangue processing plant in Xingtai, Hebei Province It is brownish black powder after drying and grinding CG2 is Shanxi coal gangue, from Shanxi Geology Group Co, LtdRepresentative coal gangue in China: Physical and chemical
Investigation on Calcination Behaviors of Coal Gangue by
In order to comprehensively utilize coal gangue, we present fluidized calcination as a new thermal technology for activating coal gangue and systematical study was conducted in comparison with static calcination The calcined products obtained by different calcination methods under various temperatures were characterized by the means of Xray diffraction (XRD), thermal gravimetry 2022年5月1日 A new coal gangue(CG) activation additive was studied in this paper, carbide slag(CS) was used as an auxiliary agent on the extraction of Al 2 O 3 from coal gangue activated by Na 2 CO 3 through acid leaching The dissolution rate of Al 2 O 3 was determined by Inductively Coupled PlasmaAtomic Emission Spectrometer(ICPAES) and calculated using Aluminum extraction from activated coal gangue with carbide slag2024年2月2日 The higher amount of kaolinite and carbon in coal gangue, the more noticeable improvement in the performance of cement paste after calcination will be observed Thermal stimulation treatment and heat recovery of 0–1 mm coal gangue are beneficial for using fully graded coal gangue as aggregate in cement concreteStudy on the calorific value and cementitious properties of coal gangue 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 was carried out with a view to improving the comprehensive utilization of CG Mineral composition, timeofflight secondary ion mass Separation and Recovery of Valuable Carbon ACS Publications
Comparison of red mud and coal gangue blended geopolymers
2017年10月30日 Properties of the aluminosilicate geopolymer using mine tailing and granulated slag J Ceram Process Res, 14 (5) (2013), pp 591594 Preparation of blended geopolymer from red mud and coal gangue with mechanical cogrinding preactivation Mater Struct, 50 (2) (2017), p 109 View in Scopus Google Scholar [33]2016年2月1日 Coal gangue is one type of industrial solid waste that is discharged when raw coal is excavated and washed after mining Based on statistics [1], every ton of coal production will cause 015–02 metric tons of coal gangue to be generated In 2012, the total of coal gangue stockpiled in China reached 5 billion metric tons and was increasing at a rate of 015–02 Preparation and properties of autoclaved aerated concrete using coal 2023年9月21日 In this study, the research aim is to enhance the activity index of activated coal gangue and study its activation mechanism The activation process of coal gangue was optimized through orthogonal tests, and the Back Study on the Reactivity Activation of Coal Gangue for 2022年6月26日 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 requirements This Using Chinese Coal Gangue as an Ecological
Activation Mechanism of Coal Gangue and Its Impact on the
2022年9月15日 Coal gangue is one of the industrial solid wastes that may harm the human body through the ecosystem for a long time Using coal gangue in geopolymer preparation can effectively reduce cement output and meet the sustainability requirements In this paper, the physical and chemical characteristics, including the heavy metal content, of coal gangue from 2017年10月1日 Request PDF Comparison of red mud and coal gangue blended geopolymers synthesized through thermal activation and mechanical grinding preactivation Two binary geopolymers were prepared from the Comparison of red mud and coal gangue blended ResearchGate2014年9月1日 When the weight ratio of Na 2 CO 3 to coal gangue was 08e1 after calcining in 800 Ce900 C, the alumina extraction ratio from coal gangue reached 90% (Guo et al, 2014a)Effect of Na2CO3 additive on the activation of coal gangue for alumina 2023年7月26日 The FTIR spectra of the raw coal gangue and the alkaliactivatedcoal ganguelime (AACGL) sample, obtained after 28 days of curing, were analyzed within the frequency range of 400–4000 cm −1, as depicted in Fig 3Upon examination of the spectra, a notable observation was made, the AACGL sample exhibited a significantly more intense band Mineralogical study of a binder based on alkaliactivated coal gangue
Preparation of coal gangueslagfly ash geopolymer grouting
2022年4月18日 Coal gangue is a solid waste produced during coal production, and it accounts for 10%∼25% of the material produced in coal mining China alone has accumulated more than 7 billion tons [5], [6], and accordingly, coal gangue is one of the mining solid wastes with the largest emissions in ChinaGeopolymers are enriched in silicaalumina (metakaolin) minerals or DOI: 101016/jjre202402018 Corpus ID: ; Characterization and acid leaching of rare earth elements in coal gangue using pretreatment of selective grinding, tailings discarding and alkali roastingCharacterization and acid leaching of rare earth elements in coal 2020年2月5日 Global rise in greenhouse gas emissions (GHG) is triggered mainly due to the consumption of fossil fuels for power generation and domestic usage Among the fossil fuels, coal is a primary contributor to global GHG with substantial emissions generated during its mining and combustion process Coal gangue, a residue produced during the coal mining process, has Characterization studies on coal gangue for sustainable geotechnics2021年9月29日 This paper describes a novel process, hematite involved roasting − alkaline leaching − Bayer digestion, to extract silica and alumina from highalumina coal gangue (HACG) The phase transformations during roasting were investigated through Xray diffraction, Xray photoelectron spectroscopy, scanning electronic microscope, and energydispersive Comprehensive Extraction of Silica and Alumina from HighAlumina Coal
Aluminiumassisted in situ synthesis of bulk SiC nanowhiskersalumina
2024年9月1日 The green and efficient use of coal gangue (CG) is urgently required in the Chinese coal industry to avoid its adverse environmental impact This study proposed an Alassisted carbothermal reduction method to synthesise SiC–Al 2 O 3 ceramics using highC CG The optimised experimental conditions for sintering SiC and their effects on the phase 2024年12月1日 This study aims to tackle the environmental pressure of spontaneous combustion coal gangue by using its active silicaalumina content to create eco grinding parameters are crucial for enhancing the reactivity and application performance of spontaneous combustion coal gangue Grinding time is a key factor affecting the powder Spontaneous combustion coal ganguebased composite cement: 2014年3月10日 A novel process for the coupling treatment of coal gangue and red mud is reported Red mud containing 234% Al2O3, 191% SiO2, and 94% Na2O by weight was used as the blended ingredients of coal gangue for alumina extraction Calcination of coal gangue with the addition of Na2CO3 at 850 °C could obtain more than 90% of Al2O3 extraction Nevertheless, Novel Process for Alumina Extraction via the Coupling Treatment of Coal 2024年3月6日 Characterization and acid leaching of rare earth elements in coal gangue using pretreatment of selective grinding, Grinding tests of coal gangue samples were conducted to explore the effect of selective grinding on the pre Effect of Na 2 CO 3 additive on the activation of coal gangue for alumina extraction Int J Miner Characterization and acid leaching of rare earth elements in coal
Separate recycling of iron and aluminum from ironrich red mud by coal
2024年7月1日 The roasted product was obtained under suitable conditions of roasting temperature of 850 °C, time of 30 min, and coal gangue proportion of 30 % according to 31 Roasting effect of temperatures and time, 32 Roasting effect of coal gangue proportion Moreover, grinding products with −37 μm contents of 3138 %, 4457 %, 5533 %, 7675 %, 85 Abstract Coal gangue, a type of kaolinite clay in coal measures, is one of the largest categories of solid industrial wastes in China Alumina extraction from coal gangue could offer an alternative to bauxite as a source of alumina Mechanically modification by grinding is an effective activation method to improve alumina recovery from coal gangueImproved extraction of alumina from coal gangue by surface 2024年11月1日 In recent years, Limestone Calcined Clay Cement (LC 3) [1], which primarily comprises calcined clay, limestone powder, and cement clinker, has become a focal point in the field of lowcarbon binder materials [[2], [3], [4]]The foundation of LC 3 cement lies in the synergistic interaction between calcined clay and limestone [5], allowing a clinker substitution Synergistic performance of microwaveactivated coal gangue with DOI: 101016/JPOWTEC201608034 Corpus ID: ; Improved extraction of alumina from coal gangue by surface mechanically grinding modification @article{Guo2016ImprovedEO, title={Improved extraction of alumina from coal gangue by surface mechanically grinding modification}, author={Yanxia Guo and Kezhou Yan and Li Cui and Fangqin Cheng}, Improved extraction of alumina from coal gangue by surface
Mineral phase transformation in coal gangue by high temperature
2021年9月1日 The coal gangue in different mining regions was sampled and analyzed The phase composition of typical high alumina coal gangue is shown in Fig 1 The main phases of coal gangue are composed of compounds containing alumina and silica, and the phases of coal gangue with different A/S are slightly different