Ultrasonic-assisted extraction(UAE)combined with medium pressure liquid chromatography(MPLC)was designed for carbazole separation from anthracene slag(AS).The effects of liquid/solid ratio,temperature,and extraction t...Ultrasonic-assisted extraction(UAE)combined with medium pressure liquid chromatography(MPLC)was designed for carbazole separation from anthracene slag(AS).The effects of liquid/solid ratio,temperature,and extraction times on carbazole separation were investigated.When using CC14 and ethyl acetate as extraction solvents and combining with MPLC,carbazole recovery and purity are 75.1%and 95.4%,respectively.The mechanism for carbazole separation were presumed by examining intermolecular interactions such as N-H…π,π-π,and C-Cl…πinteractions.These results demonstrate that UAE/MPLC has a considerable potential as a green and promising strategy for separating and purifying carbazole and other chemicals from AS.展开更多
The thermodynamic behavior of manganese and phosphorus between liquid iron and CaO-MgO-SiO2-Al2O3-FetO-MnO-P2O5 ladle slag system was addressed by investigating the thermodynamic equilibria between liquid iron contain...The thermodynamic behavior of manganese and phosphorus between liquid iron and CaO-MgO-SiO2-Al2O3-FetO-MnO-P2O5 ladle slag system was addressed by investigating the thermodynamic equilibria between liquid iron containing Mn and P and the ladle slag at 1873 K. The Mn distribution ratio L-Mn increases with increasing FetO content and decreasing the basicity ((%CaO + %MgO)/(%SiO2 + %Al2O3 + %P2O5)) in slag, while the P distribution ratio Lp seems to be increased as FetO content and the basicity increases. The values of L-Mn and L-p decrease by the addition of Al2O3 into slag. The expression of the dependence of L-Mn and L-p on the basicity and FetO content in slag was obtained.展开更多
This work first investigated the detection of slags,slag pool liquid level,and slag accumulation height in laboratory scale based on acoustic emission(AE)detection,and further tried the feasibility of this method in a...This work first investigated the detection of slags,slag pool liquid level,and slag accumulation height in laboratory scale based on acoustic emission(AE)detection,and further tried the feasibility of this method in an industrial scale coal gasifier.Results show that the energy and variance of acoustic signals can realize the accurate detection of large slag(criterion:E>1.5 E0,S>1.2 S0),and the average relative error is only 0.28%.The acoustic energy in the frequency range of 20–40 k Hz is defined as the characteristic energy,which can realize the accurate detection of slag accumulation height and slag pool liquid level,and the average relative error is only 3.94%.Furthermore,AE detection also realize accurate detection of large slag in an industrial scale gasifier and the acoustic signals at slag screen can be used to realize the early warning of the slag collapse(5 h earlier).展开更多
Ternesite(4CaO·2SiO_(2)·CaSO_(4))-Ye’elimite(3CaO·3Al_(2)O_(3)·CaSO_(4))(simplified as TY)cement clinker was successfully prepared from steel slag at 1200℃in this study.XRD,TG/DSC and SEM were us...Ternesite(4CaO·2SiO_(2)·CaSO_(4))-Ye’elimite(3CaO·3Al_(2)O_(3)·CaSO_(4))(simplified as TY)cement clinker was successfully prepared from steel slag at 1200℃in this study.XRD,TG/DSC and SEM were used to analyze the mineral composition and hydration products of the TY clinker.The sintering process and hydration mechanism of the TY clinker were investigated.Results show that a large amount of ternesite and ye’elimite have been formed at 1200℃,while ternesite has not been decomposed.Clinker minerals include ternesite,ye’elimite,gypsum and a small amount of iron phase.Iron phase from steel slag can promote the formation of liquid phase with the presence of gypsum at 1200℃and thus lead to the coexistence of ternesite and ye’elimite.The compressive strength of TY cement cured at 28 d is 59.5 MPa,which is higher than that of P.II 42.5 cement.This research provides a sustainable and energy-effective way for the reutilization of steel slag,an otherwise valueless waste.展开更多
基金Supported by the Key Project of Joint Fund for the research on Coal-Based Low Carbon Technology from National Natural Science Foundation of China and the Government of Shanxi(U1610223)Coal-based Key Scientific and Technological Projects of Shanxi Province(MJH2014-15)the National Key Research and Development Program of China(2018YFB0604602).
文摘Ultrasonic-assisted extraction(UAE)combined with medium pressure liquid chromatography(MPLC)was designed for carbazole separation from anthracene slag(AS).The effects of liquid/solid ratio,temperature,and extraction times on carbazole separation were investigated.When using CC14 and ethyl acetate as extraction solvents and combining with MPLC,carbazole recovery and purity are 75.1%and 95.4%,respectively.The mechanism for carbazole separation were presumed by examining intermolecular interactions such as N-H…π,π-π,and C-Cl…πinteractions.These results demonstrate that UAE/MPLC has a considerable potential as a green and promising strategy for separating and purifying carbazole and other chemicals from AS.
文摘The thermodynamic behavior of manganese and phosphorus between liquid iron and CaO-MgO-SiO2-Al2O3-FetO-MnO-P2O5 ladle slag system was addressed by investigating the thermodynamic equilibria between liquid iron containing Mn and P and the ladle slag at 1873 K. The Mn distribution ratio L-Mn increases with increasing FetO content and decreasing the basicity ((%CaO + %MgO)/(%SiO2 + %Al2O3 + %P2O5)) in slag, while the P distribution ratio Lp seems to be increased as FetO content and the basicity increases. The values of L-Mn and L-p decrease by the addition of Al2O3 into slag. The expression of the dependence of L-Mn and L-p on the basicity and FetO content in slag was obtained.
基金the support and encouragement of The National Science Fund for Distinguished Young(21525627)the Science Fund for Creative Research Groups of National Natural Science Foundation of China(61621002)。
文摘This work first investigated the detection of slags,slag pool liquid level,and slag accumulation height in laboratory scale based on acoustic emission(AE)detection,and further tried the feasibility of this method in an industrial scale coal gasifier.Results show that the energy and variance of acoustic signals can realize the accurate detection of large slag(criterion:E>1.5 E0,S>1.2 S0),and the average relative error is only 0.28%.The acoustic energy in the frequency range of 20–40 k Hz is defined as the characteristic energy,which can realize the accurate detection of slag accumulation height and slag pool liquid level,and the average relative error is only 3.94%.Furthermore,AE detection also realize accurate detection of large slag in an industrial scale gasifier and the acoustic signals at slag screen can be used to realize the early warning of the slag collapse(5 h earlier).
基金the financial support of the National Natural Science Foundation of China(Grant No.51872252)the Postgraduate Research&Practice Innovation Program of Jiangsu Province,China(Grant No.SJCX201356).
文摘Ternesite(4CaO·2SiO_(2)·CaSO_(4))-Ye’elimite(3CaO·3Al_(2)O_(3)·CaSO_(4))(simplified as TY)cement clinker was successfully prepared from steel slag at 1200℃in this study.XRD,TG/DSC and SEM were used to analyze the mineral composition and hydration products of the TY clinker.The sintering process and hydration mechanism of the TY clinker were investigated.Results show that a large amount of ternesite and ye’elimite have been formed at 1200℃,while ternesite has not been decomposed.Clinker minerals include ternesite,ye’elimite,gypsum and a small amount of iron phase.Iron phase from steel slag can promote the formation of liquid phase with the presence of gypsum at 1200℃and thus lead to the coexistence of ternesite and ye’elimite.The compressive strength of TY cement cured at 28 d is 59.5 MPa,which is higher than that of P.II 42.5 cement.This research provides a sustainable and energy-effective way for the reutilization of steel slag,an otherwise valueless waste.
