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
Watercontaining lignite crushing
Transformation of heavy metals in lignite during supercritical water
2017年2月1日 Supercritical water gasification (SCWG) of lignite avoids the drying process because it is carried out in water, which saves a great deal of energy Many studies have 2022年6月18日 Ma et al [10 – 12] study showed that, under the influence of water and pressure or stress, gangue generally showed a decrease in strength, an increase in crushing ratio, and Experimental Study on Crushing Characteristics of Lignite 2024年9月3日 Comparatively, the lignite oxidized at 80 °C maintained a strong chemical reactivity owing to the high relative content of CH 2 and C = O Furthermore, the preoxidation Effect of lowtemperature preoxidation on microstructure 2019年4月15日 Lignite is difficult to be used in the preparation of high concentration coal water slurry To improve its slurryability, two methods based on surface modification were investigatedPreparation of high concentration coal water slurry of lignite
Water Clusters in Lignite and Desorption Energy Calculation
Xiao et al studied the HB interactions between the organic oxygen/nitrogen monomers of lignite and water molecules; water cage clusters and water film clusters were formed around the 2023年3月24日 Current research focuses on extracting humic acid (HA) compounds from lowrank coals to obtain high valueadded products In this study, HAs with high purity and low heavy metal content were obtained from Extraction of Humic Acids from Lignite and Its 2017年1月7日 High moisture content is a main characteristic of lowrank coal, such as lignite Numerous oxygen containing functional groups in lignite make it represent some special DFT study of water adsorption on lignite molecule surface2020年2月10日 Lignite from the Borodino deposit and coal of grade D from the Belovo deposit were taken as initial coals for the preparation of coal–water suspensions Tables 7 and 8 Gasification of Ultrafine Coal–Water Suspensions
An approach for upgrading lignite to improve slurryability:
2021年5月1日 Compared with the pyrolysis of pristine lignite, the increase in coal quality and the reduction of hydrophilic oxygencontaining functional groups, as well as the pore structure After the coal is soaked in water for a certain period, obvious wet swelling and softening occur, forming a certain type of crushing, and some of the broken small particles fall off from the Variations of crushing expansion coefficient and 2018年5月1日 The oxygencontaining functional groups on the surface of lignite interact with the residual ash from spontaneous combustion to enhance the binding force between lignite and surface water Water occurrence in lignite and its interaction with coal structureGraphene oxide with different degrees of oxidation was prepared and selected as a model compound of lignite to study quantitatively, using both experiment and theoretical calculation methods, the effect on waterholding capacity of oxygencontaining functional groups The experimental results showed that graphite can be oxidized, and forms epoxy groups most Exploring the effect of oxygencontaining functional groups
The change of hydrogen bonding network during adsorption of multiwater
2020年6月1日 During the adsorption process of multiwater molecules, two types of hydrogen bonds are gradually formed in lignite One type of hydrogen bonds exists between H 2 O molecules and oxygencontaining functional groups, wheras the other exists between different H 2 O molecules As reported by previous studies, strength distributions of the above two types of 2023年8月29日 Crushing pretreatment Ball milling pretreatment ABSTRACT The chemical structure of lignite plays a fundamental role in microbial degradation, which can be altered to increase gas production In this study, the structural changes in lignite were analyzed by conducting pretreatment and biomethane gas production experiments using crushing and ballInsight into the effect of chemical structure for microbial 2022年8月10日 In this study, ligniteloaded nanoFeS (nFeS@Lignite) was successfully prepared by ultrasonic precipitation, and its potential for treating acid Cr(VI)containing wastewater was exploredPreparation of ligniteloaded nanoFeS and its2023年8月1日 The lignite ignition point after ball milling treatment was 31589 °C, which decreased by 492% compared that after crushing The R w of lignite after crushing was 3117, while that of lignite after ball milling increased by 853%, indicating that ball milling was not conducive to the combustion stability of coal As the ignition point is Insight into the effect of chemical structure for microbial lignite
Extraction of Humic Acid from Lignite by KOH
2019年4月14日 insoluble fractions by successive dissolution in deionized water at nearneutral pH [44] The above analyses showed that hydrothermal pretreatment destroys the macromolecular structure of lignite and increases the content of oxygencontaining functional groups In the present study, KOH solution was adopted to extract HA from lignite摘要： The adsorption mechanism of lignite surface oxygen containing functional groups adsorbing water molecules was studied using the quantum chemistry density functional theory(DFT)The results show that the hydrogen bonding interaction is the main force ADSORPTION MECHANISM OF WATER MOLECULE 2023年12月27日 Molecular dynamics simulation of a lignite structure simplified model absorbing water Zherui Chen, Hongxin Qiu, Zhixin Hong and Guanghui Wang School of Chemical Engineering and Technology, China Molecular dynamics simulation of a lignite structure 2022年8月10日 In this study, ligniteloaded nanoFeS (nFeS@Lignite) was successfully prepared by ultrasonic precipitation, and its potential for treating acid Cr(VI)containing wastewater was explored The results showed that the 40–80nm rodshaped nFeS was successfully loaded onto lignite particles, and the maximum adsorption capacity of Cr(VI) by Preparation of ligniteloaded nanoFeS and its performance
DFT study of water adsorption on lignite molecule
2017年8月23日 An isolated water molecule was placed on the lignite surface to simulate the adsorption of single water on lignite surface, single water adsorbed on the oxygen containing functional groups, and formed stable adsorption configurations are shown in Fig 2, and corresponding interaction energies are shown in Table 12019年3月31日 Humic acid (HA) was extracted by a hydrothermal method from Huolinhe lignite from Inner Mongolia The effects of the alkalitocarbon mass ratio, watertocoal mass ratio, reaction temperature Extraction of Humic Acid from Lignite by KOH 2018年5月1日 The fundamental understanding of the water occurrence and energy state in lignite as well as its physicalchemical interaction with coal structure is helpful to the upgrading of lignite In this paper, the water occurrence in lignite and the changes of oxygencontaining functional groups, pore structure, and water holding capacities at Water occurrence in lignite and its interaction with coal 2019年4月15日 The second fluid containing the second particle had a better surface modification effect, and the construction of a multistage structure on the lignite particle surface continuously increased its MSC, the MSC of CWS of lignite modified with kerosene contain 625 wt% of petroleum coke increased to 555 wt%Preparation of high concentration coal water slurry of lignite
Reignition characteristics of lignite affected by preoxidation
2024年9月15日 The selected lignite samples were retrieved from a coal mine in Inner Mongolia The dried samples to 40–80 mesh (018–038 mm) were sieved and sealed after crushing The results of elemental and proximate analysis for raw coal are listed in Table 1 Two groups of 20 g coal samples, named O100 and O200, were preoxidized using a high 2017年2月1日 However, the high moisture content of lignite results in substantial heat loss during gasification [5] Thus, lignite must be dried in advance, which is an energyintensive process Supercritical water gasification (SCWG) of lignite avoids the drying process because it is carried out in water, which saves a great deal of energyTransformation of heavy metals in lignite during supercritical water 2023年2月15日 The reason is that crushing causes collapse and destruction of open pores of Baiyinhua lignite [37 as an example, the heating process of watercontaining lignite shows four stages according to the temperature and the heating rate curves Stage I: Start the test and the lignite stockpile is heated up rapidly by heat convection and conductionExperimental study of moisture effects on spontaneous 2024年1月1日 The strong hydrophilicity of lignite [15] caused by the presence of hydrophilic minerals and various oxygencontaining functional groups such as phenolic hydroxyl groups, carboxyl groups, carbonyl groups, methoxyl groups, etc reduces its utilization efficiency as fuel [16, 17]To minimize the water content of lignite, it is necessary to alter its hydrophilicity by Fabrication and evaluation of novel amphiphilic star block
Gasification of Ultrafine Coal–Water Suspensions
2020年2月10日 Thermodynamic calculations of the composition of the gasification products of the coal–water slurries with lignite and coal were performed Table 2 shows the characteristics of the test coals for thermodynamic calculations The composition of gasification products was calculated using a coal–water suspension containing 40% water as an example2021年11月1日 The biomass sample was then filtered out of the solution and rinsed with deionized water The UL sample pretreated with acid washing was rinsed until the solution was neutral The same method was used for drying, crushing, and sieving The UL samples preheated by water washing and acid washing are abbreviated as WaterUL and AcidUL, respectivelyInfluence of water/acid washing pretreatment of aquatic 2024年10月12日 High moisture content: Lignite contains a significant amount of water (up to 60%), which makes it heavier and more difficult to transport and process Soft and brittle structure: The relatively soft and friable nature of lignite makes it easier to crush, but also more prone to dust generation and handling challengesLignite Crushing in Poland: Challenges and Technology2023年3月6日 The oxygencontaining functional groups on the surface of lignite interact with the residual ash from spontaneous combustion to enhance the binding force between lignite and surface water (PDF) Enhancement Mechanism of Minerals on Lignite–Water
(PDF) Lignite coal health effects and recommendations
2018年12月3日 Lignite the most polluting and healthharming form of coal In 2016, 65% of the global electricity was generated by the burning of fossil fuels, with 38% coming from hard coal and lignite2024年1月1日 The lignite coal water slurries (CWSs) prepared from the block copolymer triP and the existence of volatile components and oxygencontaining functional groups [13,14] Therefore, the development and efficient utilization of lignite has emerged as Fabrication and evaluation of novel amphiphilic star block 2022年2月18日 And nFeSlignite and lignite were characterized by XRD, SEM and EDS to explore the regularity, longacting properties and removal mechanism of acidic chromecontaining wastewater treated by NFeS Dynamic experiment on the treatment of acidic chromiumcontaining 2013年1月2日 The addition of water repellent improved the water immersion strength and redrying water immersion strength, of which briquette with the silicone emulsion were 491 KN/piece and 937 KN/piece(PDF) Production of WaterResistant Briquettes from a
Review of Practices in the Managements of Mineral Wastes:
2021年6月25日 Indeed, tailings containing sulphide minerals such as pyrite, arsenopyrite and pyrrhotine are converted into paste backfill (Yin et al, 2017), that is, a paste composed of deslimed tailings or not (75–85% in solids), sufficient water (6–10 in) and cement as hydraulic binder (2–7%) in order to ease transport to underground stopes by 2020年12月15日 Heating at 200 °C reduces the water content of lignite from 616% to 42% based on TGA and ovendrying measurements (Fig S2 in Appendix A Supplementary data)The risk of spontaneous combustion was evaluated by the apparent activation energy (E a) of combustion using TGA curves in air with a nonisothermal single rate method [22], [23]As Lignite ammonia adsorption and surface chemistry after 2018年1月1日 The work conducted by Wei et al (2016) investigated the effect of processing water containing sodium, potassium, calcium, and magnesium ions with other anions to flotation, and the results showed Improved flotation of heat treated lignite with saline solutions After the coal is soaked in water for a certain period, obvious wet swelling and softening occur, forming a certain type of crushing, and some of the broken small particles fall off from the Variations of crushing expansion coefficient and
Water occurrence in lignite and its interaction with coal structure
2018年5月1日 The oxygencontaining functional groups on the surface of lignite interact with the residual ash from spontaneous combustion to enhance the binding force between lignite and surface water Graphene oxide with different degrees of oxidation was prepared and selected as a model compound of lignite to study quantitatively, using both experiment and theoretical calculation methods, the effect on waterholding capacity of oxygencontaining functional groups The experimental results showed that graphite can be oxidized, and forms epoxy groups most Exploring the effect of oxygencontaining functional groups 2020年6月1日 During the adsorption process of multiwater molecules, two types of hydrogen bonds are gradually formed in lignite One type of hydrogen bonds exists between H 2 O molecules and oxygencontaining functional groups, wheras the other exists between different H 2 O molecules As reported by previous studies, strength distributions of the above two types of The change of hydrogen bonding network during adsorption of multiwater 2023年8月29日 Crushing pretreatment Ball milling pretreatment ABSTRACT The chemical structure of lignite plays a fundamental role in microbial degradation, which can be altered to increase gas production In this study, the structural changes in lignite were analyzed by conducting pretreatment and biomethane gas production experiments using crushing and ballInsight into the effect of chemical structure for microbial
Preparation of ligniteloaded nanoFeS and its
2022年8月10日 In this study, ligniteloaded nanoFeS (nFeS@Lignite) was successfully prepared by ultrasonic precipitation, and its potential for treating acid Cr(VI)containing wastewater was explored2023年8月1日 The lignite ignition point after ball milling treatment was 31589 °C, which decreased by 492% compared that after crushing The R w of lignite after crushing was 3117, while that of lignite after ball milling increased by 853%, indicating that ball milling was not conducive to the combustion stability of coal As the ignition point is Insight into the effect of chemical structure for microbial lignite 2019年4月14日 insoluble fractions by successive dissolution in deionized water at nearneutral pH [44] The above analyses showed that hydrothermal pretreatment destroys the macromolecular structure of lignite and increases the content of oxygencontaining functional groups In the present study, KOH solution was adopted to extract HA from ligniteExtraction of Humic Acid from Lignite by KOH 摘要： The adsorption mechanism of lignite surface oxygen containing functional groups adsorbing water molecules was studied using the quantum chemistry density functional theory(DFT)The results show that the hydrogen bonding interaction is the main force ADSORPTION MECHANISM OF WATER MOLECULE
Molecular dynamics simulation of a lignite structure
2023年12月27日 Molecular dynamics simulation of a lignite structure simplified model absorbing water Zherui Chen, Hongxin Qiu, Zhixin Hong and Guanghui Wang School of Chemical Engineering and Technology, China