Journal ArticleDOI
Investigation on Pulverized Coal Combustion Behavior by Non-Isothermic Integral Thermogravimetry Method
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TLDR
In this article, the combustion process of pulverized coal was investigated by non-isothermic integral thermogravimetry, and the thermodynamic parameters and characteristic temperatures were obtained.Abstract:
The combustion process of pulverized coal was investigated by non-isothermic integral thermogravimetry. The thermogravimetry curves were fitted by the Coats-Redferm approximation function, and kinetic parameters and characteristic temperatures were obtained. The optimal mixing ratio and particle size can be ascertained. The characteristic temperature of pulverized coal can be obtained from the thermogravimetry curve, and the combustion of coal can be divided into homogeneous and heterogeneous combustion according to the differential thermal analysis curve. The activation energy of a single type of coal ranking from low to high is as follows: bituminous coal, meager-lean coal, and anthracite. In the first mixing method, with more low-price meager-lean coal B replacing high-price anthracite A, the activation energy slightly decreases; with more bituminous coal replacing meager-lean coal, total tendency makes a declining of activation. In the later mixing method, with an increase in particle size, a declining activation energy can be seen in total tendency.read more
Citations
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Effects of basicity and MgO content on the viscosity of the SiO 2 -CaO-MgO-9wt%Al 2 O 3 slag system
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Combustion characteristics of semicokes derived from pyrolysis of low rank bituminous coal
TL;DR: In this paper, the effect of pyrolysis temperature on combustion characteristics and grindability of the semicokes was studied combined with X-ray diffraction (XRD) analysis of semicokes.
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Parametric modeling and multiobjective crashworthiness design optimization of a new front longitudinal beam
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Understanding the Relationship Between Structure and Thermophysical Properties of CaO-SiO 2 -MgO-Al 2 O 3 Molten Slags
Yongqi Sun,Hao Wang,Zuotai Zhang +2 more
TL;DR: In this article, the relationship between microscopic structure and macroscopic thermophysical properties in a basic CaO-SiO2-MgO-Al2O3 quaternary system was identified using Fourier transformation infrared, Raman and 27Al magic angular spinning nuclear magnetic resonance (MAS-NMR) techniques.
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Numerical Investigation of Burden Distribution in a Blast Furnace
Sida S Liu,Sida S Liu,Zongyan Zhou,Zongyan Zhou,Kejun Dong,Aibing Yu,David Pinson,John Tsalapatis +7 more
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References
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Journal ArticleDOI
The determination of activation energy from linear heating rate experiments: a comparison of the accuracy of isoconversion methods
TL;DR: In this article, a classification of model-free isoconversion methods for the calculation of activation energies of thermally activated reactions is proposed, by deriving expressions for the main sources of error which includes the inaccuracy in reaction rate measurement, approximations for the temperature integral and inaccuracies in determination of temperature for equivalent fraction transformed.
Journal ArticleDOI
A Brief Overview of Low CO2 Emission Technologies for Iron and Steel Making
TL;DR: In this paper, an overview of new CO2 breakthrough technologies for iron and steel making was made, and the long-term approaches to achieving a significant reduction in CO2 emissions from the steel industry would be through developing and applying CO2-based breakthrough technologies, and through increasing use of renewable energy for the steel making.
Journal ArticleDOI
Techniques to determine ignition, flame stability and burnout of blended coals in p.f. power station boilers
TL;DR: In this article, the performance of coal and anthracite blends was evaluated in laboratory, pilot, and full-scale facilities, and the results showed that blending a high-volatile coal with a low-varying coal can improve the ignition, flame stability and burnout of the blends.
Journal ArticleDOI
Exploring the possibilities of using Brazilian subbituminous coals for blast furnace pulverized fuel injection
Wolfgang Kalkreuth,Angeles G. Borrego,Diego Alvarez,Rosa Menéndez,Eduardo Osório,Morgana de Avila Ribas,Antônio C. F. Vilela,T. Cardozo Alves +7 more
TL;DR: In this article, the authors investigated the combustion and blast furnace injection performance of three Brazilian subbituminous coals (Mina do Recreio) and their beneficiation products using laboratory scale combustion tests.
Journal ArticleDOI
Thermal analysis and coal assessment: an overview with new developments☆
TL;DR: A growing number of thermal analysis methods have been involved culminating in the use of thermomagnetometry (TM), high temperature DSC (to ∼ 1500°C) and the wide ranging new method of proton magnetic resonance thermal analysis (PMRTA).