Abstract
To improve the prevention of spontaneous coal combustion, reduced iron powder and other ingredients should be added together to form an iron-based deoxidizing inhibitor, with the dual effect of oxygen consumption and inhibition. The oxygen consumption rate of the inhibitor was studied through experiments. According to the theory of coordination resistance, the coordination resistance of Fe3+ was studied via the density functional method. Subsequently, a comparative experiment of the effects on spontaneous coal combustion was conducted. The research shows that several kinds of common resistance agents that are added to the reduced iron powder can consume oxygen. However, the rate of oxygen consumption varies. Fe3+ produced by the reduced iron powder indicates a strong coordination resistance. When compared with traditional inhibitors of Mg2+, Fe3+ has a stronger inhibition effect on the N, P, and S reactive groups in coal. The overall inhibitory effect is better than that of traditional inhibitors, because of the increased oxygen consumption and the coordination resistance of Fe3+ on the basis of traditional inhibitors.
Highlights
The economy of China has developed rapidly and the demand for coal is increasing the intensity of coal mining [1]
The inorganic salts in commonly used inhibitors can be used to suppress spontaneous coal combustion and as active agents for the oxygen consumption of reduced iron powder. He et al proposed that the oxygen consumption rate of the inhibitor was related to temperature [18], and that the inhibitory effect was related to coal particle size [19]
Iron-based deoxidizing inhibitors were made by adding reduced iron powder—which consumes oxygen—and fillers to common inhibitors that are used in coal mines, such as MgCl2, KCl, and CaCl2
Summary
The economy of China has developed rapidly and the demand for coal is increasing the intensity of coal mining [1]. The inhibitors that are used in coal mines are mainly inorganic salts [7], such as NaCl, MgCl2 , and CaCl2 Their role in preventing spontaneous coal combustion, in the presence of a large amount of water, is mainly water absorption [8], moisturizing, and coordination resistance [9]. The inorganic salts in commonly used inhibitors can be used to suppress spontaneous coal combustion and as active agents for the oxygen consumption of reduced iron powder. He et al proposed that the oxygen consumption rate of the inhibitor was related to temperature [18], and that the inhibitory effect was related to coal particle size [19]. A comparative experiment of the inhibitory effect was performed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
