Utilization of Bayer red mud by a calcification–carbonation method using calcium aluminate hydrate as a calcium source

Bayer red mud accounts for the largest proportion of solid waste produced in the non-ferrous metallurgy industry and is usually handled by stockpiling because of its high alkalinity. The calcification–carbonation method (CCM) was proposed to extract alumina and sodium oxide from red mud using a full...
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Autor*in:	Lu, Guo-zhi [verfasserIn] Zhang, Ting-an [verfasserIn] Ma, Li-nan [verfasserIn] Wang, Yan-xiu [verfasserIn] Zhang, Wei-guang [verfasserIn] Zhang, Zi-mu [verfasserIn] Wang, Long [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2019

Schlagwörter:	Bayer red mud Calcification–carbonation method Calcium aluminate hydrate Silicon saturation coefficient New red mud structure

Übergeordnetes Werk:	Enthalten in: Hydrometallurgy - Amsterdam [u.a.] : Elsevier Science, 1975, 188, Seite 248-255
Übergeordnetes Werk:	volume:188 ; pages:248-255

DOI / URN:	10.1016/j.hydromet.2019.05.018

Katalog-ID:	ELV002681552

Internformat


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520			\|a Bayer red mud accounts for the largest proportion of solid waste produced in the non-ferrous metallurgy industry and is usually handled by stockpiling because of its high alkalinity. The calcification–carbonation method (CCM) was proposed to extract alumina and sodium oxide from red mud using a fully hydrometallurgical process in order to scale the valuable utilization of Bayer red mud. In this study, a modified CCM was applied, using calcium aluminate hydrate as the calcium source to recover alumina from a low-NaOH-concentration digested solution. Thermodynamic analysis revealed that the stable product of the calcification process was hydrogarnet with a high silicon saturation coefficient (x, 3CaO·Al2O3·xSiO2·6-2xH2O), and a higher reaction temperature was beneficial for the formation of hydrogarnet with a high silicon saturation coefficient. Experimental results indicated that: (1) the calcification temperature was the most important determinant of the coefficient x of the hydrogarnet, which varied from 0.35 to 0.98 over a temperature range of 60–280 °C; (2) the x value and Na mass content in the calcified slag were 0.98 and 0.35%, respectively, under calcification conditions with an NaOH concentration of 200 g/L, a temperature of 260 °C, and a C/S of 2.5:1; (3) the Na mass content and A/S decreased to 0.03% and 0.52, respectively, in the new red mud structure due to the carbonation and digestion process. The Na mass content in the new red mud structure satisfies the raw material requirements for the cement industry, and approximately 74% of the alumina in the Bayer red mud was recovered by the CCM treatment. The primary phase in the new red mud structure was CaCO3, which can be used for preparing cement or other building materials.
650		4	\|a Bayer red mud
650		4	\|a Calcification–carbonation method
650		4	\|a Calcium aluminate hydrate
650		4	\|a Silicon saturation coefficient
650		4	\|a New red mud structure
700	1		\|a Zhang, Ting-an \|e verfasserin \|4 aut
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700	1		\|a Zhang, Wei-guang \|e verfasserin \|4 aut
700	1		\|a Zhang, Zi-mu \|e verfasserin \|4 aut
700	1		\|a Wang, Long \|e verfasserin \|4 aut
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Indexfelder

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publishDate	2019
allfields	10.1016/j.hydromet.2019.05.018 doi (DE-627)ELV002681552 (ELSEVIER)S0304-386X(18)30823-5 DE-627 ger DE-627 rda eng 670 DE-600 58.41 bkl Lu, Guo-zhi verfasserin aut Utilization of Bayer red mud by a calcification–carbonation method using calcium aluminate hydrate as a calcium source 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Bayer red mud accounts for the largest proportion of solid waste produced in the non-ferrous metallurgy industry and is usually handled by stockpiling because of its high alkalinity. The calcification–carbonation method (CCM) was proposed to extract alumina and sodium oxide from red mud using a fully hydrometallurgical process in order to scale the valuable utilization of Bayer red mud. In this study, a modified CCM was applied, using calcium aluminate hydrate as the calcium source to recover alumina from a low-NaOH-concentration digested solution. Thermodynamic analysis revealed that the stable product of the calcification process was hydrogarnet with a high silicon saturation coefficient (x, 3CaO·Al2O3·xSiO2·6-2xH2O), and a higher reaction temperature was beneficial for the formation of hydrogarnet with a high silicon saturation coefficient. Experimental results indicated that: (1) the calcification temperature was the most important determinant of the coefficient x of the hydrogarnet, which varied from 0.35 to 0.98 over a temperature range of 60–280 °C; (2) the x value and Na mass content in the calcified slag were 0.98 and 0.35%, respectively, under calcification conditions with an NaOH concentration of 200 g/L, a temperature of 260 °C, and a C/S of 2.5:1; (3) the Na mass content and A/S decreased to 0.03% and 0.52, respectively, in the new red mud structure due to the carbonation and digestion process. The Na mass content in the new red mud structure satisfies the raw material requirements for the cement industry, and approximately 74% of the alumina in the Bayer red mud was recovered by the CCM treatment. The primary phase in the new red mud structure was CaCO3, which can be used for preparing cement or other building materials. Bayer red mud Calcification–carbonation method Calcium aluminate hydrate Silicon saturation coefficient New red mud structure Zhang, Ting-an verfasserin aut Ma, Li-nan verfasserin aut Wang, Yan-xiu verfasserin aut Zhang, Wei-guang verfasserin aut Zhang, Zi-mu verfasserin aut Wang, Long verfasserin aut Enthalten in Hydrometallurgy Amsterdam [u.a.] : Elsevier Science, 1975 188, Seite 248-255 Online-Ressource (DE-627)323606237 (DE-600)2026214-0 (DE-576)259271950 0304-386X nnns volume:188 pages:248-255 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 58.41 Hüttenwesen AR 188 248-255
spelling	10.1016/j.hydromet.2019.05.018 doi (DE-627)ELV002681552 (ELSEVIER)S0304-386X(18)30823-5 DE-627 ger DE-627 rda eng 670 DE-600 58.41 bkl Lu, Guo-zhi verfasserin aut Utilization of Bayer red mud by a calcification–carbonation method using calcium aluminate hydrate as a calcium source 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Bayer red mud accounts for the largest proportion of solid waste produced in the non-ferrous metallurgy industry and is usually handled by stockpiling because of its high alkalinity. The calcification–carbonation method (CCM) was proposed to extract alumina and sodium oxide from red mud using a fully hydrometallurgical process in order to scale the valuable utilization of Bayer red mud. In this study, a modified CCM was applied, using calcium aluminate hydrate as the calcium source to recover alumina from a low-NaOH-concentration digested solution. Thermodynamic analysis revealed that the stable product of the calcification process was hydrogarnet with a high silicon saturation coefficient (x, 3CaO·Al2O3·xSiO2·6-2xH2O), and a higher reaction temperature was beneficial for the formation of hydrogarnet with a high silicon saturation coefficient. Experimental results indicated that: (1) the calcification temperature was the most important determinant of the coefficient x of the hydrogarnet, which varied from 0.35 to 0.98 over a temperature range of 60–280 °C; (2) the x value and Na mass content in the calcified slag were 0.98 and 0.35%, respectively, under calcification conditions with an NaOH concentration of 200 g/L, a temperature of 260 °C, and a C/S of 2.5:1; (3) the Na mass content and A/S decreased to 0.03% and 0.52, respectively, in the new red mud structure due to the carbonation and digestion process. The Na mass content in the new red mud structure satisfies the raw material requirements for the cement industry, and approximately 74% of the alumina in the Bayer red mud was recovered by the CCM treatment. The primary phase in the new red mud structure was CaCO3, which can be used for preparing cement or other building materials. Bayer red mud Calcification–carbonation method Calcium aluminate hydrate Silicon saturation coefficient New red mud structure Zhang, Ting-an verfasserin aut Ma, Li-nan verfasserin aut Wang, Yan-xiu verfasserin aut Zhang, Wei-guang verfasserin aut Zhang, Zi-mu verfasserin aut Wang, Long verfasserin aut Enthalten in Hydrometallurgy Amsterdam [u.a.] : Elsevier Science, 1975 188, Seite 248-255 Online-Ressource (DE-627)323606237 (DE-600)2026214-0 (DE-576)259271950 0304-386X nnns volume:188 pages:248-255 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 58.41 Hüttenwesen AR 188 248-255
allfields_unstemmed	10.1016/j.hydromet.2019.05.018 doi (DE-627)ELV002681552 (ELSEVIER)S0304-386X(18)30823-5 DE-627 ger DE-627 rda eng 670 DE-600 58.41 bkl Lu, Guo-zhi verfasserin aut Utilization of Bayer red mud by a calcification–carbonation method using calcium aluminate hydrate as a calcium source 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Bayer red mud accounts for the largest proportion of solid waste produced in the non-ferrous metallurgy industry and is usually handled by stockpiling because of its high alkalinity. The calcification–carbonation method (CCM) was proposed to extract alumina and sodium oxide from red mud using a fully hydrometallurgical process in order to scale the valuable utilization of Bayer red mud. In this study, a modified CCM was applied, using calcium aluminate hydrate as the calcium source to recover alumina from a low-NaOH-concentration digested solution. Thermodynamic analysis revealed that the stable product of the calcification process was hydrogarnet with a high silicon saturation coefficient (x, 3CaO·Al2O3·xSiO2·6-2xH2O), and a higher reaction temperature was beneficial for the formation of hydrogarnet with a high silicon saturation coefficient. Experimental results indicated that: (1) the calcification temperature was the most important determinant of the coefficient x of the hydrogarnet, which varied from 0.35 to 0.98 over a temperature range of 60–280 °C; (2) the x value and Na mass content in the calcified slag were 0.98 and 0.35%, respectively, under calcification conditions with an NaOH concentration of 200 g/L, a temperature of 260 °C, and a C/S of 2.5:1; (3) the Na mass content and A/S decreased to 0.03% and 0.52, respectively, in the new red mud structure due to the carbonation and digestion process. The Na mass content in the new red mud structure satisfies the raw material requirements for the cement industry, and approximately 74% of the alumina in the Bayer red mud was recovered by the CCM treatment. The primary phase in the new red mud structure was CaCO3, which can be used for preparing cement or other building materials. Bayer red mud Calcification–carbonation method Calcium aluminate hydrate Silicon saturation coefficient New red mud structure Zhang, Ting-an verfasserin aut Ma, Li-nan verfasserin aut Wang, Yan-xiu verfasserin aut Zhang, Wei-guang verfasserin aut Zhang, Zi-mu verfasserin aut Wang, Long verfasserin aut Enthalten in Hydrometallurgy Amsterdam [u.a.] : Elsevier Science, 1975 188, Seite 248-255 Online-Ressource (DE-627)323606237 (DE-600)2026214-0 (DE-576)259271950 0304-386X nnns volume:188 pages:248-255 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 58.41 Hüttenwesen AR 188 248-255
allfieldsGer	10.1016/j.hydromet.2019.05.018 doi (DE-627)ELV002681552 (ELSEVIER)S0304-386X(18)30823-5 DE-627 ger DE-627 rda eng 670 DE-600 58.41 bkl Lu, Guo-zhi verfasserin aut Utilization of Bayer red mud by a calcification–carbonation method using calcium aluminate hydrate as a calcium source 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Bayer red mud accounts for the largest proportion of solid waste produced in the non-ferrous metallurgy industry and is usually handled by stockpiling because of its high alkalinity. The calcification–carbonation method (CCM) was proposed to extract alumina and sodium oxide from red mud using a fully hydrometallurgical process in order to scale the valuable utilization of Bayer red mud. In this study, a modified CCM was applied, using calcium aluminate hydrate as the calcium source to recover alumina from a low-NaOH-concentration digested solution. Thermodynamic analysis revealed that the stable product of the calcification process was hydrogarnet with a high silicon saturation coefficient (x, 3CaO·Al2O3·xSiO2·6-2xH2O), and a higher reaction temperature was beneficial for the formation of hydrogarnet with a high silicon saturation coefficient. Experimental results indicated that: (1) the calcification temperature was the most important determinant of the coefficient x of the hydrogarnet, which varied from 0.35 to 0.98 over a temperature range of 60–280 °C; (2) the x value and Na mass content in the calcified slag were 0.98 and 0.35%, respectively, under calcification conditions with an NaOH concentration of 200 g/L, a temperature of 260 °C, and a C/S of 2.5:1; (3) the Na mass content and A/S decreased to 0.03% and 0.52, respectively, in the new red mud structure due to the carbonation and digestion process. The Na mass content in the new red mud structure satisfies the raw material requirements for the cement industry, and approximately 74% of the alumina in the Bayer red mud was recovered by the CCM treatment. The primary phase in the new red mud structure was CaCO3, which can be used for preparing cement or other building materials. Bayer red mud Calcification–carbonation method Calcium aluminate hydrate Silicon saturation coefficient New red mud structure Zhang, Ting-an verfasserin aut Ma, Li-nan verfasserin aut Wang, Yan-xiu verfasserin aut Zhang, Wei-guang verfasserin aut Zhang, Zi-mu verfasserin aut Wang, Long verfasserin aut Enthalten in Hydrometallurgy Amsterdam [u.a.] : Elsevier Science, 1975 188, Seite 248-255 Online-Ressource (DE-627)323606237 (DE-600)2026214-0 (DE-576)259271950 0304-386X nnns volume:188 pages:248-255 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 58.41 Hüttenwesen AR 188 248-255
allfieldsSound	10.1016/j.hydromet.2019.05.018 doi (DE-627)ELV002681552 (ELSEVIER)S0304-386X(18)30823-5 DE-627 ger DE-627 rda eng 670 DE-600 58.41 bkl Lu, Guo-zhi verfasserin aut Utilization of Bayer red mud by a calcification–carbonation method using calcium aluminate hydrate as a calcium source 2019 nicht spezifiziert zzz rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Bayer red mud accounts for the largest proportion of solid waste produced in the non-ferrous metallurgy industry and is usually handled by stockpiling because of its high alkalinity. The calcification–carbonation method (CCM) was proposed to extract alumina and sodium oxide from red mud using a fully hydrometallurgical process in order to scale the valuable utilization of Bayer red mud. In this study, a modified CCM was applied, using calcium aluminate hydrate as the calcium source to recover alumina from a low-NaOH-concentration digested solution. Thermodynamic analysis revealed that the stable product of the calcification process was hydrogarnet with a high silicon saturation coefficient (x, 3CaO·Al2O3·xSiO2·6-2xH2O), and a higher reaction temperature was beneficial for the formation of hydrogarnet with a high silicon saturation coefficient. Experimental results indicated that: (1) the calcification temperature was the most important determinant of the coefficient x of the hydrogarnet, which varied from 0.35 to 0.98 over a temperature range of 60–280 °C; (2) the x value and Na mass content in the calcified slag were 0.98 and 0.35%, respectively, under calcification conditions with an NaOH concentration of 200 g/L, a temperature of 260 °C, and a C/S of 2.5:1; (3) the Na mass content and A/S decreased to 0.03% and 0.52, respectively, in the new red mud structure due to the carbonation and digestion process. The Na mass content in the new red mud structure satisfies the raw material requirements for the cement industry, and approximately 74% of the alumina in the Bayer red mud was recovered by the CCM treatment. The primary phase in the new red mud structure was CaCO3, which can be used for preparing cement or other building materials. Bayer red mud Calcification–carbonation method Calcium aluminate hydrate Silicon saturation coefficient New red mud structure Zhang, Ting-an verfasserin aut Ma, Li-nan verfasserin aut Wang, Yan-xiu verfasserin aut Zhang, Wei-guang verfasserin aut Zhang, Zi-mu verfasserin aut Wang, Long verfasserin aut Enthalten in Hydrometallurgy Amsterdam [u.a.] : Elsevier Science, 1975 188, Seite 248-255 Online-Ressource (DE-627)323606237 (DE-600)2026214-0 (DE-576)259271950 0304-386X nnns volume:188 pages:248-255 GBV_USEFLAG_U SYSFLAG_U GBV_ELV GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_32 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_110 GBV_ILN_150 GBV_ILN_151 GBV_ILN_224 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 GBV_ILN_2003 GBV_ILN_2004 GBV_ILN_2005 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2020 GBV_ILN_2021 GBV_ILN_2025 GBV_ILN_2027 GBV_ILN_2034 GBV_ILN_2038 GBV_ILN_2044 GBV_ILN_2048 GBV_ILN_2049 GBV_ILN_2050 GBV_ILN_2056 GBV_ILN_2059 GBV_ILN_2061 GBV_ILN_2064 GBV_ILN_2065 GBV_ILN_2068 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2129 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2190 GBV_ILN_2336 GBV_ILN_2507 GBV_ILN_2522 GBV_ILN_4035 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4242 GBV_ILN_4251 GBV_ILN_4305 GBV_ILN_4313 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4326 GBV_ILN_4333 GBV_ILN_4334 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4393 58.41 Hüttenwesen AR 188 248-255
language	English
source	Enthalten in Hydrometallurgy 188, Seite 248-255 volume:188 pages:248-255
sourceStr	Enthalten in Hydrometallurgy 188, Seite 248-255 volume:188 pages:248-255
format_phy_str_mv	Article
bklname	Hüttenwesen
institution	findex.gbv.de
topic_facet	Bayer red mud Calcification–carbonation method Calcium aluminate hydrate Silicon saturation coefficient New red mud structure
dewey-raw	670
isfreeaccess_bool	false
container_title	Hydrometallurgy
authorswithroles_txt_mv	Lu, Guo-zhi @@aut@@ Zhang, Ting-an @@aut@@ Ma, Li-nan @@aut@@ Wang, Yan-xiu @@aut@@ Zhang, Wei-guang @@aut@@ Zhang, Zi-mu @@aut@@ Wang, Long @@aut@@
publishDateDaySort_date	2019-01-01T00:00:00Z
hierarchy_top_id	323606237
dewey-sort	3670
id	ELV002681552
language_de	englisch
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Experimental results indicated that: (1) the calcification temperature was the most important determinant of the coefficient x of the hydrogarnet, which varied from 0.35 to 0.98 over a temperature range of 60–280 °C; (2) the x value and Na mass content in the calcified slag were 0.98 and 0.35%, respectively, under calcification conditions with an NaOH concentration of 200 g/L, a temperature of 260 °C, and a C/S of 2.5:1; (3) the Na mass content and A/S decreased to 0.03% and 0.52, respectively, in the new red mud structure due to the carbonation and digestion process. The Na mass content in the new red mud structure satisfies the raw material requirements for the cement industry, and approximately 74% of the alumina in the Bayer red mud was recovered by the CCM treatment. 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author	Lu, Guo-zhi
spellingShingle	Lu, Guo-zhi ddc 670 bkl 58.41 misc Bayer red mud misc Calcification–carbonation method misc Calcium aluminate hydrate misc Silicon saturation coefficient misc New red mud structure Utilization of Bayer red mud by a calcification–carbonation method using calcium aluminate hydrate as a calcium source
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topic_title	670 DE-600 58.41 bkl Utilization of Bayer red mud by a calcification–carbonation method using calcium aluminate hydrate as a calcium source Bayer red mud Calcification–carbonation method Calcium aluminate hydrate Silicon saturation coefficient New red mud structure
topic	ddc 670 bkl 58.41 misc Bayer red mud misc Calcification–carbonation method misc Calcium aluminate hydrate misc Silicon saturation coefficient misc New red mud structure
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title	Utilization of Bayer red mud by a calcification–carbonation method using calcium aluminate hydrate as a calcium source
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title_full	Utilization of Bayer red mud by a calcification–carbonation method using calcium aluminate hydrate as a calcium source
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title_sort	utilization of bayer red mud by a calcification–carbonation method using calcium aluminate hydrate as a calcium source
title_auth	Utilization of Bayer red mud by a calcification–carbonation method using calcium aluminate hydrate as a calcium source
abstract	Bayer red mud accounts for the largest proportion of solid waste produced in the non-ferrous metallurgy industry and is usually handled by stockpiling because of its high alkalinity. The calcification–carbonation method (CCM) was proposed to extract alumina and sodium oxide from red mud using a fully hydrometallurgical process in order to scale the valuable utilization of Bayer red mud. In this study, a modified CCM was applied, using calcium aluminate hydrate as the calcium source to recover alumina from a low-NaOH-concentration digested solution. Thermodynamic analysis revealed that the stable product of the calcification process was hydrogarnet with a high silicon saturation coefficient (x, 3CaO·Al2O3·xSiO2·6-2xH2O), and a higher reaction temperature was beneficial for the formation of hydrogarnet with a high silicon saturation coefficient. Experimental results indicated that: (1) the calcification temperature was the most important determinant of the coefficient x of the hydrogarnet, which varied from 0.35 to 0.98 over a temperature range of 60–280 °C; (2) the x value and Na mass content in the calcified slag were 0.98 and 0.35%, respectively, under calcification conditions with an NaOH concentration of 200 g/L, a temperature of 260 °C, and a C/S of 2.5:1; (3) the Na mass content and A/S decreased to 0.03% and 0.52, respectively, in the new red mud structure due to the carbonation and digestion process. The Na mass content in the new red mud structure satisfies the raw material requirements for the cement industry, and approximately 74% of the alumina in the Bayer red mud was recovered by the CCM treatment. The primary phase in the new red mud structure was CaCO3, which can be used for preparing cement or other building materials.
abstractGer	Bayer red mud accounts for the largest proportion of solid waste produced in the non-ferrous metallurgy industry and is usually handled by stockpiling because of its high alkalinity. The calcification–carbonation method (CCM) was proposed to extract alumina and sodium oxide from red mud using a fully hydrometallurgical process in order to scale the valuable utilization of Bayer red mud. In this study, a modified CCM was applied, using calcium aluminate hydrate as the calcium source to recover alumina from a low-NaOH-concentration digested solution. Thermodynamic analysis revealed that the stable product of the calcification process was hydrogarnet with a high silicon saturation coefficient (x, 3CaO·Al2O3·xSiO2·6-2xH2O), and a higher reaction temperature was beneficial for the formation of hydrogarnet with a high silicon saturation coefficient. Experimental results indicated that: (1) the calcification temperature was the most important determinant of the coefficient x of the hydrogarnet, which varied from 0.35 to 0.98 over a temperature range of 60–280 °C; (2) the x value and Na mass content in the calcified slag were 0.98 and 0.35%, respectively, under calcification conditions with an NaOH concentration of 200 g/L, a temperature of 260 °C, and a C/S of 2.5:1; (3) the Na mass content and A/S decreased to 0.03% and 0.52, respectively, in the new red mud structure due to the carbonation and digestion process. The Na mass content in the new red mud structure satisfies the raw material requirements for the cement industry, and approximately 74% of the alumina in the Bayer red mud was recovered by the CCM treatment. The primary phase in the new red mud structure was CaCO3, which can be used for preparing cement or other building materials.
abstract_unstemmed	Bayer red mud accounts for the largest proportion of solid waste produced in the non-ferrous metallurgy industry and is usually handled by stockpiling because of its high alkalinity. The calcification–carbonation method (CCM) was proposed to extract alumina and sodium oxide from red mud using a fully hydrometallurgical process in order to scale the valuable utilization of Bayer red mud. In this study, a modified CCM was applied, using calcium aluminate hydrate as the calcium source to recover alumina from a low-NaOH-concentration digested solution. Thermodynamic analysis revealed that the stable product of the calcification process was hydrogarnet with a high silicon saturation coefficient (x, 3CaO·Al2O3·xSiO2·6-2xH2O), and a higher reaction temperature was beneficial for the formation of hydrogarnet with a high silicon saturation coefficient. Experimental results indicated that: (1) the calcification temperature was the most important determinant of the coefficient x of the hydrogarnet, which varied from 0.35 to 0.98 over a temperature range of 60–280 °C; (2) the x value and Na mass content in the calcified slag were 0.98 and 0.35%, respectively, under calcification conditions with an NaOH concentration of 200 g/L, a temperature of 260 °C, and a C/S of 2.5:1; (3) the Na mass content and A/S decreased to 0.03% and 0.52, respectively, in the new red mud structure due to the carbonation and digestion process. The Na mass content in the new red mud structure satisfies the raw material requirements for the cement industry, and approximately 74% of the alumina in the Bayer red mud was recovered by the CCM treatment. The primary phase in the new red mud structure was CaCO3, which can be used for preparing cement or other building materials.
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title_short	Utilization of Bayer red mud by a calcification–carbonation method using calcium aluminate hydrate as a calcium source
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author2	Zhang, Ting-an Ma, Li-nan Wang, Yan-xiu Zhang, Wei-guang Zhang, Zi-mu Wang, Long
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up_date	2024-07-06T17:05:37.005Z
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Experimental results indicated that: (1) the calcification temperature was the most important determinant of the coefficient x of the hydrogarnet, which varied from 0.35 to 0.98 over a temperature range of 60–280 °C; (2) the x value and Na mass content in the calcified slag were 0.98 and 0.35%, respectively, under calcification conditions with an NaOH concentration of 200 g/L, a temperature of 260 °C, and a C/S of 2.5:1; (3) the Na mass content and A/S decreased to 0.03% and 0.52, respectively, in the new red mud structure due to the carbonation and digestion process. The Na mass content in the new red mud structure satisfies the raw material requirements for the cement industry, and approximately 74% of the alumina in the Bayer red mud was recovered by the CCM treatment. 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code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Wang, Yan-xiu</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Zhang, Wei-guang</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Zhang, Zi-mu</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Wang, Long</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Hydrometallurgy</subfield><subfield code="d">Amsterdam [u.a.] : Elsevier Science, 1975</subfield><subfield code="g">188, Seite 248-255</subfield><subfield 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Utilization of Bayer red mud by a calcification–carbonation method using calcium aluminate hydrate as a calcium source

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