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The exploration of carbonation routine utilizing BOFs, CRW and CO2 has a significant effect on terminated treatment of metallurgical wastes resourceful disposal at a low cost. This paper investigated the collaborative effect of CRW composition on slag carbonation degree and CRW decalcification rate in CO2 sequestration system, furthermore, the effect of reaction time etc. on both were also discussed under optimal composition. Moreover, the carbonation process was simulated by Aspen software for comparing with the experimental results. The results showed that slag carbonation degree and CRW decalcification rate increased as CRW hardness increased, and kept stable. The optimal calcium conversion was 50.4 %, corresponding to 15.9g CO2/100g slag, and the decalcification rate was 87.1 %, respectively, at 80 °C and 10 L/kg for 60 min. The Aspen simulation results showed the correlation degrees were 0.94 for calcium conversion and 0.98 for decalcification rate.
Chao Wei; Jianping Dong; Zehui Hu; Huining Zhang; Xu Wang; Zhifang Tong; Chunfa Liao. CO2 sequestration exploration utilizing converter slag and cold-rolling waste water: The effect of carbonation parameters. Process Safety and Environmental Protection 2021, 148, 1233 -1242.
AMA StyleChao Wei, Jianping Dong, Zehui Hu, Huining Zhang, Xu Wang, Zhifang Tong, Chunfa Liao. CO2 sequestration exploration utilizing converter slag and cold-rolling waste water: The effect of carbonation parameters. Process Safety and Environmental Protection. 2021; 148 ():1233-1242.
Chicago/Turabian StyleChao Wei; Jianping Dong; Zehui Hu; Huining Zhang; Xu Wang; Zhifang Tong; Chunfa Liao. 2021. "CO2 sequestration exploration utilizing converter slag and cold-rolling waste water: The effect of carbonation parameters." Process Safety and Environmental Protection 148, no. : 1233-1242.
Better adaptive kinetics model for CO2 sequestration utilizing wastes in steelmaking plant has a big significance for establishing green out-circulating network system. This work investigated the effect of temperature, L/S ratio and cold-rolling wastewater concentration on carbonation degree in basic oxygen furnace slag and CRW carbonation process, then their kinetics was discussed by surface coverage model and shrinking core model, respectively, in order to evaluate their adaptability and accuracy. Furthermore, CO2 sequestration intensifying factor was originally proposed for considering the carbonation depth, through comparing diffusion coefficient of CO2 between water carbonation and wastewater carbonation. The results showed that carbonation conversion increased as temperature and CRW concentration increased except for L/S ratio, and the maximum carbonation could reach 41.499±1.240%. Because higher prediction error existed in surface coverage model, the shrinking core model had a better adaptability and accuracy for analyzing carbonation process in autoclave. Meanwhile, the CO2 sequestration intensifying factor was 1.6 times as big as carbonation process in distilled water as a result of DCO2 value. CO2 sequestration reaction in our work was controlled by calcium diffused because of DCO2 (0.700 - 0.976 × 10-4 cm2 s-1) and DCa (0.935 - 1.149 × 10-5 cm2 s-1). The results above will be helpful for us to better comprehend the reaction kinetics at micro-scale, when the idea of triple wastes self-circulation system network will be established to industrial application.
Chao Wei; Jianping Dong; Huining Zhang; Xu Wang. Kinetics model adaptability analysis of CO2 sequestration process utilizing steelmaking slag and cold-rolling wastewater. Journal of Hazardous Materials 2020, 404, 124094 .
AMA StyleChao Wei, Jianping Dong, Huining Zhang, Xu Wang. Kinetics model adaptability analysis of CO2 sequestration process utilizing steelmaking slag and cold-rolling wastewater. Journal of Hazardous Materials. 2020; 404 ():124094.
Chicago/Turabian StyleChao Wei; Jianping Dong; Huining Zhang; Xu Wang. 2020. "Kinetics model adaptability analysis of CO2 sequestration process utilizing steelmaking slag and cold-rolling wastewater." Journal of Hazardous Materials 404, no. : 124094.
The wastes network system exploration in metallurgical process imposes of great significance for advancing green circular economy in steel plant. This paper originally proposes a closed-circulating CO2 sequestering process for wastes appreciation and harmless disposal, and the effect of two circulation strategy, i.e. Slag circulation strategy and cold-rolling waste water(CRW) circulation strategy, on the CO2 uptake efficiency, carbonation degree and desalination rate were systemically discussed. Then, their kinetics are analyzed by model and molecular simulation in detail, respectively. In addition, the energy consumption and the cost are simulated for comprehensively evaluating its superiority. The experimental and molecular simulation results all show that the peak values for both strategies could be achieved when circulation times is in the range of three to five. CRW circulation strategy has a better CO2 uptake efficiency than slag circulation strategy, the CO2 uptake efficiency is about 487kgCO2/tslag and corresponding desalination rate is 48.9%, when CRW is circulated for five times at 60 °C and 20 L/g for 90 min. Adopting CRW circulation strategy, the CO2 sequestration efficiency is averagely doubled comparing to previous results. 129%–183% energy consumption and 35.6% cost would be reduced, which represents that the proposed routine is economical to step forward to industrial application.
Huining Zhang; Quanqin Zuo; Chao Wei; Xin Lin; Jianping Dong; Chunfa Liao; Anjun Xu. Closed-circulating CO2 sequestration process evaluation utilizing wastes in steelmaking plant. Science of The Total Environment 2020, 738, 139747 .
AMA StyleHuining Zhang, Quanqin Zuo, Chao Wei, Xin Lin, Jianping Dong, Chunfa Liao, Anjun Xu. Closed-circulating CO2 sequestration process evaluation utilizing wastes in steelmaking plant. Science of The Total Environment. 2020; 738 ():139747.
Chicago/Turabian StyleHuining Zhang; Quanqin Zuo; Chao Wei; Xin Lin; Jianping Dong; Chunfa Liao; Anjun Xu. 2020. "Closed-circulating CO2 sequestration process evaluation utilizing wastes in steelmaking plant." Science of The Total Environment 738, no. : 139747.
Chromium leaching from stainless steel slag should be dealt with when utilized them as construction materials, an original idea of increasing calcite coating compactness in slag matrix is proposed for solving this problem. The paper originally proposes a carbonation strategy balancing carbon dioxide sequestration efficiency and chromium leaching inhibition kinetics through forming calcite coating. 48–75 μm stainless steel slag is carbonated at 300 °C and 0.4 MPa for 120 min, carbonated slag and fresh slag are applied for chromium leaching tests, aiming to discuss the inhibition kinetics of calcite coating combining with XRD, SEM–EDS, FT-IR and EMPA analysis. The results show that 7.9% valorization degree can be achieved for stainless steel slag under the conditions, and a thin layer of calcite coating is formed in slag matrix. Diffusion rates of chromium are in the range from 1.32 × 10−11 to 2.12 × 10–11 min−1 and from 0.617 × 10−11 to 1.47 × 10−11 min−1 for fresh and carbonated slag, respectively. Inhibition efficiency of calcite coating on diffusion rate is about 30% to 53%, and diffusion active energies for fresh slag and carbonated slag are 6.84 kJ/mol and 12.51 kJ/mol, respectively, which represents that carbonation strategy is indeed valid for inhibiting chromium leaching, when stainless steel slag is utilized as construction materials or road-based aggregates.
Huining Zhang; Chao Wei; Jianping Dong. Inhibition Kinetics of Chromium Leaching by Calcite Coating on the Surface of Stainless Steel Slag via the Gas–Solid Accelerated Carbonation Process. Waste and Biomass Valorization 2020, 12, 475 -485.
AMA StyleHuining Zhang, Chao Wei, Jianping Dong. Inhibition Kinetics of Chromium Leaching by Calcite Coating on the Surface of Stainless Steel Slag via the Gas–Solid Accelerated Carbonation Process. Waste and Biomass Valorization. 2020; 12 (1):475-485.
Chicago/Turabian StyleHuining Zhang; Chao Wei; Jianping Dong. 2020. "Inhibition Kinetics of Chromium Leaching by Calcite Coating on the Surface of Stainless Steel Slag via the Gas–Solid Accelerated Carbonation Process." Waste and Biomass Valorization 12, no. 1: 475-485.
The phase stability and electronic and mechanical properties of rare earth (RE) carbides (La2C3, LaC2, Ce2C3, CeC2, and CeC) were investigated using first-principles calculations based on density functional theory. The calculated equilibrium lattice constants and cell volume agree well with available experimental data. The cohesive energy and formation enthalpy of these carbides show that they are thermodynamically and mechanically stable except LaC. The strong covalent bonding exists in these compounds, and the covalent bonds are mainly determined to be RE–C and C–C bonds. The hardness of RExCy compounds is less than 10 GPa, and the bulk modulus, shear modulus, and Young’s modulus of Ce2C3 are the largest. The values of B/G (ratio of bulk modulus to shear modulus) and Poisson’s ratio indicate that all the compounds have good ductility, and the ductility of CeC is larger than others. The Debye temperature of Ce2C3 is 429.67 K, which is the highest in those of experimental compounds.
Hui-Ning Zhang; Qiu-Yan Wu; Zhen-Ying Hu; Hui Li; Hui-Hui Xiong; An-Jun Xu. First-principles study on stability, electronic, and mechanical properties of La–C and Ce–C binary compounds. Journal of Iron and Steel Research International 2019, 26, 771 -778.
AMA StyleHui-Ning Zhang, Qiu-Yan Wu, Zhen-Ying Hu, Hui Li, Hui-Hui Xiong, An-Jun Xu. First-principles study on stability, electronic, and mechanical properties of La–C and Ce–C binary compounds. Journal of Iron and Steel Research International. 2019; 26 (7):771-778.
Chicago/Turabian StyleHui-Ning Zhang; Qiu-Yan Wu; Zhen-Ying Hu; Hui Li; Hui-Hui Xiong; An-Jun Xu. 2019. "First-principles study on stability, electronic, and mechanical properties of La–C and Ce–C binary compounds." Journal of Iron and Steel Research International 26, no. 7: 771-778.
The leaching of chromium from stainless steel dust (SSD) is deleterious to the environment. To address this issue, the reduction of SSD briquettes can be employed to effectively extract chromium. The recovery rates of iron, chromium, and nickel via iron-bath reduction of SSD briquettes were determined using X-ray fluorescence spectroscopy, X-ray diffraction, and scanning electron microscopy measurements. First, the effects of basicity and contents of silicon, iron, CaF2, and carbon on the recovery rates of the three metals were analyzed using the slag amount prediction model, which was originally established from the Al2O3 balance of corundum crucible erosion behavior. Second, the effect of feeding mode, i.e., whether steel scrap and SSD briquettes were simultaneously added, on the recovery rates was discussed in detail. Third, the iron-bath reduction of SSD briquettes was thermodynamically analyzed. The results indicated that the recovery rates of the three metals are greater than 95% those of using a basicity of 1.5 and 6.0% CaF2, 15% carbon, and 7% ferrosilicon. The recovery rate of chromium increases twofold with the addition of ferrosilicon. The feeding mode of adding briquettes and steel scrap simultaneously is better for recovery of metals and separation of the metal and slag than the feeding mode of adding steel scrap firstly and then briquettes.
Fei Yuan; Hui-Ning Zhang; Hui Li; Jian-Hong Dong; Hui-Hui Xiong; An-Jun Xu. Recovery rates of iron, nickel, and chromium via iron-bath reduction of stainless steel dust briquettes based on corundum crucible erosion balance analysis. Journal of Iron and Steel Research International 2018, 25, 320 -329.
AMA StyleFei Yuan, Hui-Ning Zhang, Hui Li, Jian-Hong Dong, Hui-Hui Xiong, An-Jun Xu. Recovery rates of iron, nickel, and chromium via iron-bath reduction of stainless steel dust briquettes based on corundum crucible erosion balance analysis. Journal of Iron and Steel Research International. 2018; 25 (3):320-329.
Chicago/Turabian StyleFei Yuan; Hui-Ning Zhang; Hui Li; Jian-Hong Dong; Hui-Hui Xiong; An-Jun Xu. 2018. "Recovery rates of iron, nickel, and chromium via iron-bath reduction of stainless steel dust briquettes based on corundum crucible erosion balance analysis." Journal of Iron and Steel Research International 25, no. 3: 320-329.
The recovery of iron, chromium, and nickel from stainless steel dust (SSD) has attracted considerable attention for their utilization as secondary resources in the ever-growing field of steelmaking. This paper investigates the reduction process of SSD briquettes in iron-baths in detail in order to determine the optimum processing parameters. A novel method of analysis by studying the erosion behavior of a corundum crucible was adopted to accurately calculate the recovery rate of the metals, and the effect of the parameters on the triple metals recovery rate was determined by orthogonal testing. The results show that the most important factor for the SSD briquetting process is water, followed by sucrose, carbon, and pressure. The optimum parameters of the SSD briquetting process are 13 wt% sucrose, 13 wt% water, 11 wt% carbon, and 30 MPa pressure. The compressive intensity was found to be 27.6 MPa. When a basicity of 1.6, 17% carbon, 5 wt% ferrosilicon, and 6% CaF2 were used in the SSD briquette reduction process, the triple metal recovery rate was in the range of 94 –100 %, 90 –100 %, and almost 100 %, respectively.
Huining Zhang; Li Hui; Jianhong Dong; Huihui Xiong. Optimization of the Stainless Steel Dust Briquette Reduction Process for Iron, Chromium, and Nickel Recovery. High Temperature Materials and Processes 2018, 37, 785 -791.
AMA StyleHuining Zhang, Li Hui, Jianhong Dong, Huihui Xiong. Optimization of the Stainless Steel Dust Briquette Reduction Process for Iron, Chromium, and Nickel Recovery. High Temperature Materials and Processes. 2018; 37 (8):785-791.
Chicago/Turabian StyleHuining Zhang; Li Hui; Jianhong Dong; Huihui Xiong. 2018. "Optimization of the Stainless Steel Dust Briquette Reduction Process for Iron, Chromium, and Nickel Recovery." High Temperature Materials and Processes 37, no. 8: 785-791.
To evaluate the effect of the mineralogical phase on carbonation efficiency for CaO-Al2O3-SiO2 slag, a calcite phase conversion prediction model is proposed. This model combines carbon dioxide solubility with carbonation reaction kinetic analysis to improve the prediction capability. The effect of temperature and carbonation time on the carbonation degree is studied in detail. Results show that the reaction rate constant ranges from 0.0135 h−1 to 0.0458 h−1 and that the mineralogical phase contribution sequence for the carbonation degree is C2S, CaO, C3A and CS. The model accurately predicts the effect of temperature and carbonation time on the simulated calcite conversion, and the results agree with the experimental data. The optimal carbonation temperature and reaction time are 333 K and 90 min, respectively. The maximum carbonation efficiency is about 184.3 g/kg slag, and the simulation result of the calcite phase content in carbonated slag is about 20%.
Huining Zhang; Jianhong Dong; Hui Li; Huihui Xiong; Anjun Xu. Calcite Phase Conversion Prediction Model for CaO-Al2O3-SiO2 Slag: An Aqueous Carbonation Process at Ambient Pressure. JOM 2017, 70, 938 -945.
AMA StyleHuining Zhang, Jianhong Dong, Hui Li, Huihui Xiong, Anjun Xu. Calcite Phase Conversion Prediction Model for CaO-Al2O3-SiO2 Slag: An Aqueous Carbonation Process at Ambient Pressure. JOM. 2017; 70 (6):938-945.
Chicago/Turabian StyleHuining Zhang; Jianhong Dong; Hui Li; Huihui Xiong; Anjun Xu. 2017. "Calcite Phase Conversion Prediction Model for CaO-Al2O3-SiO2 Slag: An Aqueous Carbonation Process at Ambient Pressure." JOM 70, no. 6: 938-945.
Hui-Hui Xiong; Heng-Hua Zhang; Hui-Ning Zhang; Yang Zhou. Effects of alloying elements X (X=Zr, V, Cr, Mn, Mo, W, Nb, Y) on ferrite/TiC heterogeneous nucleation interface: first-principles study. Journal of Iron and Steel Research International 2017, 24, 328 -334.
AMA StyleHui-Hui Xiong, Heng-Hua Zhang, Hui-Ning Zhang, Yang Zhou. Effects of alloying elements X (X=Zr, V, Cr, Mn, Mo, W, Nb, Y) on ferrite/TiC heterogeneous nucleation interface: first-principles study. Journal of Iron and Steel Research International. 2017; 24 (3):328-334.
Chicago/Turabian StyleHui-Hui Xiong; Heng-Hua Zhang; Hui-Ning Zhang; Yang Zhou. 2017. "Effects of alloying elements X (X=Zr, V, Cr, Mn, Mo, W, Nb, Y) on ferrite/TiC heterogeneous nucleation interface: first-principles study." Journal of Iron and Steel Research International 24, no. 3: 328-334.
Mineralogical phases of steelmaking slags have significant influences on the carbonation of the slags. In this paper, the effects of temperature and reaction time on the conversion of calcium-related phases and the carbonation degree of a slag sample were studied. The experimental conditions were a liquid-to-solid ratio of 20 mL/g, a carbon dioxide flow rate of 1 L/min and a slag particle size of 38–75 μm. The results show that the optimum carbonation temperature and reaction time are 60 °C and 90 min, respectively, and calcite phase content is about 26.78% while the conversion rates of Ca3Al2O6, CaSiO3, Ca2SiO4 and free CaO are about 40%, 42.46%, 51% and 100%, respectively, and the carbon dioxide sequestration efficiency is about 170 g/kg slag.
Huining Zhang; Yongming Lu; Jianhong Dong; Lei Gan; Zhifang Tong. Roles of Mineralogical Phases in Aqueous Carbonation of Steelmaking Slag. Metals 2016, 6, 117 .
AMA StyleHuining Zhang, Yongming Lu, Jianhong Dong, Lei Gan, Zhifang Tong. Roles of Mineralogical Phases in Aqueous Carbonation of Steelmaking Slag. Metals. 2016; 6 (5):117.
Chicago/Turabian StyleHuining Zhang; Yongming Lu; Jianhong Dong; Lei Gan; Zhifang Tong. 2016. "Roles of Mineralogical Phases in Aqueous Carbonation of Steelmaking Slag." Metals 6, no. 5: 117.
Hui-Ning Zhang; Jian-Li Li; An-Jun Xu; Qi-Xing Yang; Dong-Feng He; Nai-Yuan Tian. Carbothermic Reduction of Zinc and Iron Oxides in Electric Arc Furnace Dust. Journal of Iron and Steel Research International 2014, 21, 427 -432.
AMA StyleHui-Ning Zhang, Jian-Li Li, An-Jun Xu, Qi-Xing Yang, Dong-Feng He, Nai-Yuan Tian. Carbothermic Reduction of Zinc and Iron Oxides in Electric Arc Furnace Dust. Journal of Iron and Steel Research International. 2014; 21 (4):427-432.
Chicago/Turabian StyleHui-Ning Zhang; Jian-Li Li; An-Jun Xu; Qi-Xing Yang; Dong-Feng He; Nai-Yuan Tian. 2014. "Carbothermic Reduction of Zinc and Iron Oxides in Electric Arc Furnace Dust." Journal of Iron and Steel Research International 21, no. 4: 427-432.
The limitation and experimental CO2 sequestration degree of steel slag is the focus. The theoretical and the practical CO2 sequestration degree was assessed under mild operating conditions. After calculation in theory, it can be found that the CO2 sequestration limitation degree for every kilogram steel slag is about 442 g when taking magnesium into consideration, and the experimental CO2 sequestration degree for every kilogram slag is about 77 g, under the conditions that the liquid to solid ratio is 50 L/kg, CO2 flow is 0.5 L/min and the temperature of reaction is the ambient temperature. When solution NH4Cl and CH3COOH for experiments and other conditions keep the same, the actual potential CO2 sequestration for every kilogram slag is 69.3 g and 31.20 g respectively. Thus, optimization of process parameters like granularity of slag is necessary to enhance the carbon dioxide sequestration degree for steel slag.
Jian-Li Li; Hui-Ning Zhang; An-Jun Xu; Jian Cui; Dong-Feng He; Nai-Yuan Tian. Theoretical and Experimental on Carbon Dioxide Sequestration Degree of Steel Slag. Journal of Iron and Steel Research International 2012, 19, 29 -32.
AMA StyleJian-Li Li, Hui-Ning Zhang, An-Jun Xu, Jian Cui, Dong-Feng He, Nai-Yuan Tian. Theoretical and Experimental on Carbon Dioxide Sequestration Degree of Steel Slag. Journal of Iron and Steel Research International. 2012; 19 (12):29-32.
Chicago/Turabian StyleJian-Li Li; Hui-Ning Zhang; An-Jun Xu; Jian Cui; Dong-Feng He; Nai-Yuan Tian. 2012. "Theoretical and Experimental on Carbon Dioxide Sequestration Degree of Steel Slag." Journal of Iron and Steel Research International 19, no. 12: 29-32.
In order to improve the accuracy of model for terminative temperature in steelmaking, it is necessary to predict and control before decarburization. Thus, an optimization neural network model of terminative temperature in the process of dephosphorization by laying correlative degree weights to all input factors related was used. Then simulation experiment of model newly established is conducted utilizing 210 data from a domestic steel plant. The results show that hit rate arrives at 56.45% when error is within plus or minus 5%, and the value is 100% when within ±10%. Comparing to the traditional neural network prediction model, the accuracy almost increases by 6.839%. Thus, the simulation prediction fits the real perfectly, which accounts for that neural network model for terminative temperature based on grey theory can reflect accurately the practice in dephosphorization. Naturally, this method is effective and practicable.
Hui-Ning Zhang; An-Jun Xu; Jian Cui; Dong-Feng He; Nai-Yuan Tian. Establishment of Neural Network Prediction Model for Terminative Temperature Based on Grey Theory in Hot Metal Pretreatment. Journal of Iron and Steel Research International 2012, 19, 25 -29.
AMA StyleHui-Ning Zhang, An-Jun Xu, Jian Cui, Dong-Feng He, Nai-Yuan Tian. Establishment of Neural Network Prediction Model for Terminative Temperature Based on Grey Theory in Hot Metal Pretreatment. Journal of Iron and Steel Research International. 2012; 19 (6):25-29.
Chicago/Turabian StyleHui-Ning Zhang; An-Jun Xu; Jian Cui; Dong-Feng He; Nai-Yuan Tian. 2012. "Establishment of Neural Network Prediction Model for Terminative Temperature Based on Grey Theory in Hot Metal Pretreatment." Journal of Iron and Steel Research International 19, no. 6: 25-29.
In order to study calcium leaching behavior for the steelmaking slag, factors that influence the leaching yield have been optimized. The results show that granularity of the slag, liquid to solid ratio (in short for L/S), temperature and reaction time have a significant effect on the leaching yield. The optimal conditions for leaching are determined as follows: 1) the granularity at 75 μm, L/S at 100, temperature at 60 °C; 2) the granularity at 75 μm, L/S at 50, temperature at 40 °C. Finally, the optimal leaching yield under these conditions is about 15%.
An-Jun Xu; Hui-Ning Zhang; Yi Yang; Jian Cui; Dong-Feng He; Nai-Yuan Tian. Optimization Study of Calcium Leaching From Steelmaking Slag. Journal of Iron and Steel Research International 2012, 19, 34 -38.
AMA StyleAn-Jun Xu, Hui-Ning Zhang, Yi Yang, Jian Cui, Dong-Feng He, Nai-Yuan Tian. Optimization Study of Calcium Leaching From Steelmaking Slag. Journal of Iron and Steel Research International. 2012; 19 (4):34-38.
Chicago/Turabian StyleAn-Jun Xu; Hui-Ning Zhang; Yi Yang; Jian Cui; Dong-Feng He; Nai-Yuan Tian. 2012. "Optimization Study of Calcium Leaching From Steelmaking Slag." Journal of Iron and Steel Research International 19, no. 4: 34-38.