Effect of MgO/Al[sub.2]O[sub.3] on Viscosity and Thermodynamic Properties of High-Titanium Slag Containing Chlorine

In order to study the effect of the change of MgO/Al[sub.2]O[sub.3] on the viscosity and thermodynamic properties of the chlorinated blast-furnace slag, the CaO-SiO[sub.2]-MgO-Al[sub.2]O[sub.3]-TiO[sub.2]-CaCl[sub.2] slag system was taken as the research object, and the viscosity change rule of the...

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Veröffentlicht in:Minerals (Basel) 2023-03, Vol.13 (3)
Hauptverfasser: Cheng, Qinyu, Zhang, Zhaohui, Xing, Xiangdong, Zheng, Jianlu, She, Yuan
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Zhang, Zhaohui
Xing, Xiangdong
Zheng, Jianlu
She, Yuan
description In order to study the effect of the change of MgO/Al[sub.2]O[sub.3] on the viscosity and thermodynamic properties of the chlorinated blast-furnace slag, the CaO-SiO[sub.2]-MgO-Al[sub.2]O[sub.3]-TiO[sub.2]-CaCl[sub.2] slag system was taken as the research object, and the viscosity change rule of the chlorinated high-titanium slag was studied by using the rotating cylinder method. The thermal stability of the chlorinated high-titanium slag was quantitatively analyzed by calculating the extreme heat release rate (EHRS) of the chlorinated high-titanium slag. At the same time, the qualitative and quantitative analysis of the high-titanium slag containing chlorine was carried out by combining FTIR and Raman spectroscopy, and the mechanism of the influence of MgO/Al[sub.2]O[sub.3] on the viscous flow characteristics of the high-titanium slag containing chlorine was revealed. The results show that when the alkalinity (R[sub.2]) of the fixed slag is 1.15, when MgO/Al[sub.2]O[sub.3] is in the range of 0.40-0.66, the viscosity of the high-titanium slag containing chlorine presents a significant decreasing trend with the gradual increase of MgO/Al[sub.2]O[sub.3], and the viscous flow activation energy of the slag decreases from 98.75kJ · mol[sup.−1] to 95.21kJ · mol[sup.−1]. The heat capacity and enthalpy change of slag decrease with the increase of MgO/Al[sub.2]O[sub.3], but the change rule of slag extreme heat release is opposite to that of heat capacity and enthalpy change. When MgO/Al[sub.2]O[sub.3] increases, the slag extreme heat release increases from 13.413 kJ to 15.172 kJ. The content of simple structural units Q[sup.0] and Q[sup.1] of silicate tetrahedron in the slag gradually increases, the content of complex structural units Q[sup.2] and Q[sup.3] gradually decreases, and the average amount of non-bridging oxygen decreases from 1.94 to 1.79, indicating that Al[sub.2]O[sub.3] acts as a network maker in the internal network structure of the slag. The increase of MgO/Al[sub.2]O[sub.3] destroys the complex silicate tetrahedron structure in the slag, reducing the degree of polymerization of the slag silicate network. In addition, the transmissivity of [SiO[sub.4]][sup.4−] tetrahedron, [AlO[sub.4]][sup.4−] tetrahedron and T-O-T bond bending vibration band in the slag shows a decreasing trend. Within the scope of the experiment, the increase of MgO/Al[sub.2]O[sub.3] can effectively improve the fluidity of the chlorine-containing blast-furnace slag and improve the
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The thermal stability of the chlorinated high-titanium slag was quantitatively analyzed by calculating the extreme heat release rate (EHRS) of the chlorinated high-titanium slag. At the same time, the qualitative and quantitative analysis of the high-titanium slag containing chlorine was carried out by combining FTIR and Raman spectroscopy, and the mechanism of the influence of MgO/Al[sub.2]O[sub.3] on the viscous flow characteristics of the high-titanium slag containing chlorine was revealed. The results show that when the alkalinity (R[sub.2]) of the fixed slag is 1.15, when MgO/Al[sub.2]O[sub.3] is in the range of 0.40-0.66, the viscosity of the high-titanium slag containing chlorine presents a significant decreasing trend with the gradual increase of MgO/Al[sub.2]O[sub.3], and the viscous flow activation energy of the slag decreases from 98.75kJ · mol[sup.−1] to 95.21kJ · mol[sup.−1]. The heat capacity and enthalpy change of slag decrease with the increase of MgO/Al[sub.2]O[sub.3], but the change rule of slag extreme heat release is opposite to that of heat capacity and enthalpy change. When MgO/Al[sub.2]O[sub.3] increases, the slag extreme heat release increases from 13.413 kJ to 15.172 kJ. The content of simple structural units Q[sup.0] and Q[sup.1] of silicate tetrahedron in the slag gradually increases, the content of complex structural units Q[sup.2] and Q[sup.3] gradually decreases, and the average amount of non-bridging oxygen decreases from 1.94 to 1.79, indicating that Al[sub.2]O[sub.3] acts as a network maker in the internal network structure of the slag. The increase of MgO/Al[sub.2]O[sub.3] destroys the complex silicate tetrahedron structure in the slag, reducing the degree of polymerization of the slag silicate network. In addition, the transmissivity of [SiO[sub.4]][sup.4−] tetrahedron, [AlO[sub.4]][sup.4−] tetrahedron and T-O-T bond bending vibration band in the slag shows a decreasing trend. Within the scope of the experiment, the increase of MgO/Al[sub.2]O[sub.3] can effectively improve the fluidity of the chlorine-containing blast-furnace slag and improve the thermal stability of the chlorine-containing blast-furnace slag.</description><identifier>ISSN: 2075-163X</identifier><identifier>EISSN: 2075-163X</identifier><identifier>DOI: 10.3390/min13030444</identifier><language>eng</language><publisher>MDPI AG</publisher><subject>Aluminum oxide ; Analysis ; Thermodynamics ; Titanium</subject><ispartof>Minerals (Basel), 2023-03, Vol.13 (3)</ispartof><rights>COPYRIGHT 2023 MDPI AG</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Cheng, Qinyu</creatorcontrib><creatorcontrib>Zhang, Zhaohui</creatorcontrib><creatorcontrib>Xing, Xiangdong</creatorcontrib><creatorcontrib>Zheng, Jianlu</creatorcontrib><creatorcontrib>She, Yuan</creatorcontrib><title>Effect of MgO/Al[sub.2]O[sub.3] on Viscosity and Thermodynamic Properties of High-Titanium Slag Containing Chlorine</title><title>Minerals (Basel)</title><description>In order to study the effect of the change of MgO/Al[sub.2]O[sub.3] on the viscosity and thermodynamic properties of the chlorinated blast-furnace slag, the CaO-SiO[sub.2]-MgO-Al[sub.2]O[sub.3]-TiO[sub.2]-CaCl[sub.2] slag system was taken as the research object, and the viscosity change rule of the chlorinated high-titanium slag was studied by using the rotating cylinder method. The thermal stability of the chlorinated high-titanium slag was quantitatively analyzed by calculating the extreme heat release rate (EHRS) of the chlorinated high-titanium slag. At the same time, the qualitative and quantitative analysis of the high-titanium slag containing chlorine was carried out by combining FTIR and Raman spectroscopy, and the mechanism of the influence of MgO/Al[sub.2]O[sub.3] on the viscous flow characteristics of the high-titanium slag containing chlorine was revealed. The results show that when the alkalinity (R[sub.2]) of the fixed slag is 1.15, when MgO/Al[sub.2]O[sub.3] is in the range of 0.40-0.66, the viscosity of the high-titanium slag containing chlorine presents a significant decreasing trend with the gradual increase of MgO/Al[sub.2]O[sub.3], and the viscous flow activation energy of the slag decreases from 98.75kJ · mol[sup.−1] to 95.21kJ · mol[sup.−1]. The heat capacity and enthalpy change of slag decrease with the increase of MgO/Al[sub.2]O[sub.3], but the change rule of slag extreme heat release is opposite to that of heat capacity and enthalpy change. When MgO/Al[sub.2]O[sub.3] increases, the slag extreme heat release increases from 13.413 kJ to 15.172 kJ. The content of simple structural units Q[sup.0] and Q[sup.1] of silicate tetrahedron in the slag gradually increases, the content of complex structural units Q[sup.2] and Q[sup.3] gradually decreases, and the average amount of non-bridging oxygen decreases from 1.94 to 1.79, indicating that Al[sub.2]O[sub.3] acts as a network maker in the internal network structure of the slag. The increase of MgO/Al[sub.2]O[sub.3] destroys the complex silicate tetrahedron structure in the slag, reducing the degree of polymerization of the slag silicate network. In addition, the transmissivity of [SiO[sub.4]][sup.4−] tetrahedron, [AlO[sub.4]][sup.4−] tetrahedron and T-O-T bond bending vibration band in the slag shows a decreasing trend. Within the scope of the experiment, the increase of MgO/Al[sub.2]O[sub.3] can effectively improve the fluidity of the chlorine-containing blast-furnace slag and improve the thermal stability of the chlorine-containing blast-furnace slag.</description><subject>Aluminum oxide</subject><subject>Analysis</subject><subject>Thermodynamics</subject><subject>Titanium</subject><issn>2075-163X</issn><issn>2075-163X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid/><recordid>eNpNUM1KxDAYDKLgsu7JF8gLtJu_pu1xWVZXWKlgEUEWSZuk_aRNpOke9u2NPwdnDjPMYRgGoVtKUs5Lsh7BUU44EUJcoAUjeZZQyV8v__lrtArhg0SUlBcZW6Cws9a0M_YWP3bVejO8hVOTsmP1o_yIvcMvEFofYD5j5TSuezONXp-dGqHFT5P_NNMMJnxX7KHrkxpm5eA04udBdXjr3azAgYu2H_wEztygK6uGYFZ_ukT13a7e7pNDdf-w3RwSJZlMuLaE65KxgohcMZkJY3IjNWsKzbglMqdFYZUWykYwS42gsmyaVmW5bcuML1H6W9upwbyDs36eVBupTVzunbEQ802eEUHjOZJ_AYJXYXE</recordid><startdate>20230301</startdate><enddate>20230301</enddate><creator>Cheng, Qinyu</creator><creator>Zhang, Zhaohui</creator><creator>Xing, Xiangdong</creator><creator>Zheng, Jianlu</creator><creator>She, Yuan</creator><general>MDPI AG</general><scope/></search><sort><creationdate>20230301</creationdate><title>Effect of MgO/Al[sub.2]O[sub.3] on Viscosity and Thermodynamic Properties of High-Titanium Slag Containing Chlorine</title><author>Cheng, Qinyu ; Zhang, Zhaohui ; Xing, Xiangdong ; Zheng, Jianlu ; She, Yuan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a626-3df03d9228047a2654ee7e6d2b8d23f067188fad4affff2f1e4169bbca57fc953</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Aluminum oxide</topic><topic>Analysis</topic><topic>Thermodynamics</topic><topic>Titanium</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Cheng, Qinyu</creatorcontrib><creatorcontrib>Zhang, Zhaohui</creatorcontrib><creatorcontrib>Xing, Xiangdong</creatorcontrib><creatorcontrib>Zheng, Jianlu</creatorcontrib><creatorcontrib>She, Yuan</creatorcontrib><jtitle>Minerals (Basel)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Cheng, Qinyu</au><au>Zhang, Zhaohui</au><au>Xing, Xiangdong</au><au>Zheng, Jianlu</au><au>She, Yuan</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of MgO/Al[sub.2]O[sub.3] on Viscosity and Thermodynamic Properties of High-Titanium Slag Containing Chlorine</atitle><jtitle>Minerals (Basel)</jtitle><date>2023-03-01</date><risdate>2023</risdate><volume>13</volume><issue>3</issue><issn>2075-163X</issn><eissn>2075-163X</eissn><abstract>In order to study the effect of the change of MgO/Al[sub.2]O[sub.3] on the viscosity and thermodynamic properties of the chlorinated blast-furnace slag, the CaO-SiO[sub.2]-MgO-Al[sub.2]O[sub.3]-TiO[sub.2]-CaCl[sub.2] slag system was taken as the research object, and the viscosity change rule of the chlorinated high-titanium slag was studied by using the rotating cylinder method. The thermal stability of the chlorinated high-titanium slag was quantitatively analyzed by calculating the extreme heat release rate (EHRS) of the chlorinated high-titanium slag. At the same time, the qualitative and quantitative analysis of the high-titanium slag containing chlorine was carried out by combining FTIR and Raman spectroscopy, and the mechanism of the influence of MgO/Al[sub.2]O[sub.3] on the viscous flow characteristics of the high-titanium slag containing chlorine was revealed. The results show that when the alkalinity (R[sub.2]) of the fixed slag is 1.15, when MgO/Al[sub.2]O[sub.3] is in the range of 0.40-0.66, the viscosity of the high-titanium slag containing chlorine presents a significant decreasing trend with the gradual increase of MgO/Al[sub.2]O[sub.3], and the viscous flow activation energy of the slag decreases from 98.75kJ · mol[sup.−1] to 95.21kJ · mol[sup.−1]. The heat capacity and enthalpy change of slag decrease with the increase of MgO/Al[sub.2]O[sub.3], but the change rule of slag extreme heat release is opposite to that of heat capacity and enthalpy change. When MgO/Al[sub.2]O[sub.3] increases, the slag extreme heat release increases from 13.413 kJ to 15.172 kJ. The content of simple structural units Q[sup.0] and Q[sup.1] of silicate tetrahedron in the slag gradually increases, the content of complex structural units Q[sup.2] and Q[sup.3] gradually decreases, and the average amount of non-bridging oxygen decreases from 1.94 to 1.79, indicating that Al[sub.2]O[sub.3] acts as a network maker in the internal network structure of the slag. The increase of MgO/Al[sub.2]O[sub.3] destroys the complex silicate tetrahedron structure in the slag, reducing the degree of polymerization of the slag silicate network. In addition, the transmissivity of [SiO[sub.4]][sup.4−] tetrahedron, [AlO[sub.4]][sup.4−] tetrahedron and T-O-T bond bending vibration band in the slag shows a decreasing trend. Within the scope of the experiment, the increase of MgO/Al[sub.2]O[sub.3] can effectively improve the fluidity of the chlorine-containing blast-furnace slag and improve the thermal stability of the chlorine-containing blast-furnace slag.</abstract><pub>MDPI AG</pub><doi>10.3390/min13030444</doi></addata></record>
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subjects Aluminum oxide
Analysis
Thermodynamics
Titanium
title Effect of MgO/Al[sub.2]O[sub.3] on Viscosity and Thermodynamic Properties of High-Titanium Slag Containing Chlorine
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