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Analysis of the reasons for the large slag discharge volume of the mediumspeed coal mill in our factory
Slag discharge characteristics and engineering application of
Establish the numerical model of borehole slag discharge for a round drill pipe and the prismatic grooved drill pipe in the borehole collapse area Perform the 展开2024年4月1日 Coal gasification technology has led to a significant discharge of solid waste known as coal gasification slag (CGS) However, the high composition of Si and Al in CGS, Modification and resource utilization of coal gasification slag According to the working principle of the mill, the reasons of larger quantity of its slag discharge were analyzed The concrete measures for preventing large quantity of slag discharge of the Analysis on reasons of larger quantity of slag discharge of medium 2024年6月15日 To elucidate the distribution law of the multiphase coupling slag discharge flow field in gaslift reverse circulation during drilling shaft sinking, a numerical analysis model ofCFD–DEM method is used to study the multiphase coupling slag
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Multiobjective optimization of parameters of slurry shield slag
2024年3月1日 In this paper, the CFDDEM coupling method is used to simulate the high water pressure environment of the seabed and solve the slag movement trajectory of the slag 2024年2月3日 The multiscale analysis of FS performed in this study indicates typical grain size distribution, composition, crystalline structure, and chemical bonding characteristicsMultiscale analysis of fine slag from pulverized coal gasification in 2022年1月1日 The results showed that the viscositytemperature characteristics of slag had a great influence on the slag flow response process The slag steady time and the The effect of coal viscositytemperature characteristics on the In summary, the generation and growth of crystals in slag were affected by the temperature and incubation time (equal to the residence time), and the viscosity of a specific component of the Modeling Study of the Slag Behaviors Based on Temperature–Time
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Physical and Chemical Properties of Coal Gasification Fine Slag
2022年5月4日 Among the three types of coal gasification fine slag, the particle surface pore structure of DSG Y is the most developed, showing the largest specific surface area and pore 2024年7月9日 This paper focuses on the Jinhua furnace coal gasification slag (fine slag, FS; coarse slag, CS) as the research subject, analyzing its composition and structural Composition and Structural Characteristics of Coal Gasification 2021年10月1日 Upper graphs: mean monthly discharge series (Q) of the Paraná River at the Corrientes gauging station (1200 km upstream the mouth) and the corresponding deseasonalized series for the 19042020 The Importance of Monitoring River Water Discharge2019年6月28日 Coal gasification fine slag (CGFS), which is the byproduct of entrainedflow coal gasification, has superior properties, such as a large surface area, a broad pore size distribution, and a high content of carbon This material has the potential to amend poor soils This study was carried out to investigate the use of CGFS as a soil amendment for alkaline sandy lands Effect of Coal Gasification Fine Slag on the Physicochemical
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CFD–DEM method is used to study the multiphase coupling slag
2024年6月15日 The specifications for the drilling diameter, slag discharge method, slag discharge medium, and well washing parameters are distinct from those of largebore coal mine vertical shaft drilling gas 2015年10月1日 When the slag pot is filled with liquid slag, a large thermal load acts on it, and, as a result, severe plastic deformations of the pot occur, at least lo cally The danger of this behaviourTransient ThermalStress Analysis of Steel Slag Pots: Impact of Dry slag discharge system is based on VB and achieves hybrid programming of VB and VC; humancomputer interaction interface and heat transfer model of dry slag discharge system are designed; and analysis result is output General framework of the whole system is shown in Figure 3 Figure 3 General framework of dry slag discharge systemVisualization of the heat transfer character of dry slag discharge 2021年5月15日 When fine ash was used alone as feedstock, it was difficult to reach the required temperature for the discharge of liquid slag When fine ash and coal were cogasified, the outlet temperatures were 1461 and 1529 ℃, which could meet the gasifier’s safe operational requirements for smooth discharge of liquid slagThe study of slag discharge behavior of entrainedflow gasifier
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The study of slag discharge behavior of entrainedflow gasifier
2021年5月1日 The viscositytemperature characteristics of slag were key factors in selecting the candidate coal types and the operation conditions of the entrained flow gasifier2020年1月8日 Considering the volumetosurface ratio of continuously cast products, it is clear that billet casting involves low mold flux consumption rates measured in kg of powder per m 2 of strand[] Therefore, since consumption is constrained, it is possible to use mold powders which form highviscosity slags and thus, minimize slag entrapment that would otherwise result from Analysis of the Kinetics of Devitrification and Crystallization of a 2020年10月9日 Simulation results under the ∅5250 × 500 mm mill model show that the mill operates with the optimal effect when the mill is under the condition of 80% critical speed and 15% fill level; the Operation Analysis of a SAG Mill under Different Conditions Based on 2024年6月15日 To elucidate the distribution law of the multiphase coupling slag discharge flow field in gaslift reverse circulation during drilling shaft sinking, a numerical analysis model of gasliquidsolid multiphase coupling slag discharge was established by CFDDEM 5 China Coal Special Drilling Co, Ltd, Hefei, , ChinaCFDDEM method is used to study the multiphase coupling slag discharge
Review on treatment technologies of coal gasification wastewater
2022年1月20日 Coal gasification generally refers to an incomplete reaction between various coal (coke) and oxygencarrying gasification agents (O 2, H 2 O, CO 2), and finally produces a gas composed of CO, H 2, CO 2, CH 4, N 2, H 2 S, COS etc (Fan et al, 2019)Coal gasification technology is the core of clean and efficient conversion of coal, and is the foundation of the JOURNAL METRICS Impact Factor (JCR) 2023: 07 ℹ Impact Factor (JCR): The JCR provides quantitative tools for ranking, evaluating, categorizing, and comparing journals The impact factor is one of these; it is a measure of the Visualization of the heat transfer character of dry slag Figismatic grooved drill pipe 1 Pr grooved drill pipe forms three slag discharge functions: uid Fig 2 Principle for overcoming borehole collapse area a Radial slag discharge principle b Slag discharge route (a) Radial slag discharge principle (b) Slag discharge route 141 Page 2 of 9 Arab J Geosci (2022) 15: 141Slag discharge characteristics and engineering application of 2020年7月1日 Slag powder is a process with characters of multivariables, strongly coupling and nonlinearity The material layer thickness plays an important role in the processAnalysis and multiobjective optimization of slag powder
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Analysis of Steel Slag Composition and Properties to Facilitate
2020年11月13日 With steel slag and coal gangue mixed in various mass ratios, from 100% steel slag to 100% coal gangue at 10% intervals, microstructure and possible phase evolution of the coal ganguesteel slag 2020年11月29日 The software was also used to explore the effect of additives on sludge and fouling during Zhundong coal gasification [22] FactSage was also used to calculate the linear relationship between the (PDF) FactSage Studies to Identify the Optimum Slag2018年12月19日 This content was downloaded from IP address 17817188104 on 19/12/2018 at 17:13The Present Situation and Analysis of Slag Splashing Technology 2021年1月1日 According to the characteristics of high efficiency and high hole forming rate of the triangularshaped drill pipe in the process of drilling in soft outburst coal seam, the slag discharge model Numerical Simulation Analysis Based on the Study of the Slag discharge
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The hydration of slag, part 1: reaction models for alkaliactivated slag
2006年11月29日 Reaction models are proposed to quantify the hydration products and to determine the composition of C–S–H from alkaliactivated slags (AAS) Products of the slag hydration are first summarized from observations in literature The main hydration products include C–S–H, hydrotalcite, hydrogarnet, AFm phases (C4AH13 and C2ASH8) and ettringite Typically, autocatalysts consist of honeycomb cordierite (2MgO2Al 2 O 3 5SiO 2 or 2FeO2Al 2 O 3 5SiO 2), γAl 2 O 3 coating, and PGMs [15]To enhance the catalytic performance of the catalyst, some additives, such as CeO 2, ZrO 2, La 2 O 3, and others, are incorporated into the coating [16], [17]During the utilization of automobile exhaust catalysts, platinum group metals Comprehensive recycling of slag from the smelting of spent 2024年1月17日 The intrinsic mechanism and impact process of how coal gasification coarse slag (CGCS) amends the physicochemical properties of a specific soil based on its properties are not yet clear The study explored the properties of CGCS that can be used for soil amendment by evaluating the properties of topsoil and CGCS Different CGCS additions (0%, 5%, 10%, 15%, Use of coal gasification coarse slag to amend the soil water, 2021年9月2日 The urban sewage discharge is a complex system influenced by various factors However, the extant research is limited in examining the mechanism by which urban sewage discharge is caused Drawing upon the ‘driving force–pressure–state–impact–response’ (DPSIR) model, our paper proposes a theoretical framework to address the influencing factors of urban What influences the urban sewage discharge in China? The
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Research on the Application of Coal Gasification Slag
2022年12月13日 SEM, particle size analysis, and contaminant content of coarse coal gasification slag (CCGS) produced by Shenhua Xinjiang Chemical Co, Ltd were measured, respectively, and the physicochemical properties of the soil The slag fluidity is affected by temperature and composition, with the latter influenced by ore gangue minerals and ash materials of coke and pulverised coal CaO/SiO 2 in the slag, even in slag compositions, is adjusted in Japan to a range of 12 to 13 in concentration by an auxiliary material in terms of fluidity and desulfurization Effect of High Al2O3 Slag on the Blast Furnace Operations JSTAGE2024年9月17日 1 Introduction Slag is crucial in secondary steelmaking as it affects the quality of the final product in many ways A typical secondary metallurgy ladle slag is a fourcomponent system comprising aluminum oxide (Al 2 O 3), calcium oxide (CaO), silicon oxide (SiO 2), and magnesium oxide (MgO)Some important functions of slag are steel desulphurization and Experimental Determination of Slag Emissivities for Enhanced Slag 2016年2月16日 This research optimizes the mathematical model of inclusions movment at the interface between slag and metal according to the model of Nakajima and Strandh[13–15] The movement of inclusions at the steel–slag interface is shown in Figure 1The figure has ordinate Z and abscissa tThe abscissa is drawn along the direction of the steel–slag interface, and Motion Behavior of Nonmetallic Inclusions at the Interface
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The effect of coal viscositytemperature characteristics on the
2022年1月1日 This investigation addresses the minimum fluidization velocity (Umf) determination in a refractory insulated fluidized bed reactor (FBR) of 200 mm IDattention when analyzing the share of coal underburning at the plants To increase the boiler efficiency, the model thermal and gas dynamic calculations with comparison of experimental results are required for the detailed analysis of the reasons for underburning of large particles of pulverized coal at the plantsUnburnt carbon and iron content in the ash and slag thermal p = CFD DEM method is used to study the multiphase coupling slag discharge 1 Introduction The electric arc furnace (EAF) constitutes the main process in scrapbased steelmaking [] Invented in 1889 by Paul Héroult, it was initially used mostly for production of special steels, but established itself as one of the main steelmaking processes in the later part of the 20th century [] In 2018, the EAF process supplied 523 918 000 t of steel worldwide, A Review of Mathematical Process Models for the Electric Arc
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(PDF) Analysis of Thermal Interactions in the Slag Pots for
2022年4月30日 Castings of this type (especially largesize ladles with a capacity of up to 16 m3) operate under very demanding conditions resulting from the repeated cycles of filling and emptying the ladle The chemical composition of coal ash and four slag samples were determined by XRF Before XRF analysis, the coal ash and four slag samples were prepared as follows First, the original coal sample was placed in a muffle furnace and heated to 500 C from room temperature within 50 min and then keep the present temperature for 30 minUnderstanding the slag transformation behaviors during 2024年2月15日 Ultrafine, highly active coal gasification slag (HCGS) was produced via a sustainable, green dryballmilling method Coal gasification fine slag (CGS), a potential environmental pollutant, was used as a new source of Performance of FullComponent Coal Gasification Fine 2024年4月1日 Coal gasification technology has led to a significant increase in CGS discharge and consequently, the disposal of gasified solid waste gasification slag has become a major concern [10]It is reported that, more than 70 million tons of CGS is produced every year in China [11]Only a very small part of the slag is used, while the vast majority of CGS is simply Modification and resource utilization of coal gasification slag
Largescale application of coal gasification slag in nonburnt bricks
2024年3月29日 Coal gasification slag (CGS) is a solid waste discharged from the coal gasification process [1]Depending on different discharge processes, CGS is mainly classified into coarse slag (furnace bottom slag with grain sizes of 375–900 mm) and fine slag (less than 50 μm) [2]Approximately 015–02 tons of CGS are emitted for every ton of coal gasification 2021年5月11日 If the partitioning to the slag increases by a larger factor than the slag volume, it means that the content of the corresponding element in the slag is increased significantly As shown in Fig 5 , the effect of temperature on As contents is significant where at 1220 °C the Ascontent in the slag is decreased by 004 wt%Thermodynamic Analysis of Copper Smelting, Considering the Impact 2021年4月23日 Finally, brief reviews of PD denoising signals, feature extraction of PD signals, and classification of partial discharge sources have been addressed Classification of fault in power transformerOverview and Partial Discharge Analysis of Power Transformers2015年4月14日 The blast furnace (BF) slag waste heat was recovered by an integrated system stage by stage, which combined a physical and chemical method The water and coal gasification reactions were used to recover the heat in the system Based on the first and second law of thermodynamics, the thermodynamic analysis of the system was carried out by the Thermodynamic Analysis of Blast Furnace Slag Waste Heat
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XRD/Rietveld Analysis of the Hydration and Strength Development of Slag
2006年10月1日 XRD analysis showed the formation of hydrotalcite and sjögrenite as main crystalline phases in cementslag system [5], and coupling with the selective dissolution method made it possible to 2018年12月15日 Most of the above literatures were concentrated on studying the slag behaviors under the steadystate conditions Seggiani [14] studied the slag behavior with time varied in Prenflo gasifier, in which the effect of variation of feed and starting of O 2 lance on slag flow was investigated The time varied model was based on the combination of mass conservation, Numerical study of dynamic response analysis of slag behaviors