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Prof. Dr. Huiqing Tang
University of Science and Technology Beijing China

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Conference paper
Published: 17 February 2021 in The Minerals, Metals & Materials Series
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In this research, using the carbon composite briquette (CCB) containing carbon: 20.30 wt%, Fe3O4: 29.70 wt%, FeO: 39.70 wt%, metallic iron: 1.57 wt%, and gangue: 8.73 wt%. the reaction behavior of the CCB in BF and the influence of coal reactivity was examined by the numerical investigation. Results showed that the development of the CCB reaction in BF was divided into six stages. The initial temperature of the CCB self-reduction was 850 K, the dominant temperature range in CCB reaction being effective for BF energy-saving was from 1000 K to 1150 K, its final reduction fraction, and final carbon conversion was 1.0 and 0.9, respectively. By decreasing the activation energy of coal gasification, the initial temperature of CCB self-reduction became lower, the effective temperature range of CCB reaction for BF energy-saving was wider, and the final carbon conversion increased, indicating to improve the coal reactivity in CCB could intensify the effect of its reaction on BF energy-saving. By increasing the activation energy of coal gasification, the initial temperature became higher, the effective temperature range of CCB reaction for BF energy-saving was narrower, and the final carbon conversion decreased, reflecting that to reduce coal reactivity in CCB could weaken the effect of its reaction on BF energy-saving.

ACS Style

Zi Yu; Tao Rong; Huiqing Tang. Influence of Coal Reactivity on Carbon Composite Briquette Reaction in Blast Furnace. The Minerals, Metals & Materials Series 2021, 75 -84.

AMA Style

Zi Yu, Tao Rong, Huiqing Tang. Influence of Coal Reactivity on Carbon Composite Briquette Reaction in Blast Furnace. The Minerals, Metals & Materials Series. 2021; ():75-84.

Chicago/Turabian Style

Zi Yu; Tao Rong; Huiqing Tang. 2021. "Influence of Coal Reactivity on Carbon Composite Briquette Reaction in Blast Furnace." The Minerals, Metals & Materials Series , no. : 75-84.

Journal article
Published: 19 January 2021 in Metallurgical Research & Technology
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In this research, using iron-oxide fines (average size: 2.5 μm) and biochar fines (average size: 50.0 μm), the biochar composite briquette (BCB) for blast furnace (BF) application was prepared by cold briquetting followed by heat treatment. The preparing conditions were optimized regarding its cold crushing strength. Anti-pulverization capability, reaction development, and structure evolution of the optimally-designed BCB under simulated BF conditions were then examined. Results of optimizing BCB preparation conditions showed that a heating temperature of 1073 K was optimal for preparing the BCB. The optimally-designed BCB contained 11.10 wt.% carbon, 72.21 wt.% Fe3O4, 11.25 wt.% FeO, and 0.77 wt.% Fe, 6.44 wt.% gangue, and had a cold crushing strength of 1800 N/briquette. Results of BCB behavior under simulated BF conditions showed that the cold crushing strength after partial reaction of the BCB ranged from 1500 N/briquette to 5500 N/briquette and its maximum volume shrinkage degree was 0.45. The high anti-pulverization capability of the BCB was supported by the slag matrix or the iron network. Under the simulated BF conditions, the BCB underwent five stages of reduction by atmosphere, partial self-reduction and reduction by atmosphere, full self-reduction, partial self-reduction and gasification by atmosphere, and gasification by atmosphere. It is inferred from the experimental findings that, by charging the BCB in BF, an increase of top gas utilization efficiency could be realized, and a favorable influence on lowering the temperature level of the thermal reserve zone could be obtained.

ACS Style

Zi Yu; Zhu Liu; Huiqing Tang; Qingguo Xue. Preparation of high-strength biochar composite briquette for blast furnace ironmaking. Metallurgical Research & Technology 2021, 118, 109 .

AMA Style

Zi Yu, Zhu Liu, Huiqing Tang, Qingguo Xue. Preparation of high-strength biochar composite briquette for blast furnace ironmaking. Metallurgical Research & Technology. 2021; 118 (1):109.

Chicago/Turabian Style

Zi Yu; Zhu Liu; Huiqing Tang; Qingguo Xue. 2021. "Preparation of high-strength biochar composite briquette for blast furnace ironmaking." Metallurgical Research & Technology 118, no. 1: 109.

Journal article
Published: 01 January 2021 in Powder Technology
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In this research, carbon composite briquette (CCB) for BF application was prepared and had a mineralogical composition of carbon: 20.30 wt%, Fe3O4: 29.70 wt%, FeO: 39.70 wt%, Fe: 1.57 wt% and gangue: 8.73 wt%. A reaction model of the CCB in BF was developed. Using the model, the CCB reaction behavior under simulated BF conditions was explained, and the CCB reaction behavior in actual BF was predicted. Results showed that the model predictions agreed well with the experimental measurements. Under simulated BF conditions, the CCB underwent fast self-reduction in the period from 70 min (973 K) to 110 min (1273 K). In this stage, the reactions inside the CCB proceeded unevenly in the radial direction, resulting in a dense iron layer near the CCB surface. The simulation results of CCB reaction in an actual BF indicated that charging CCB in the region near the mid-radius was preferred. The CCB reaction behavior in BF could be divided into five stages: reduction by BF gas (500–850 K), partial self-reduction with reduction by BF gas (850–973 K), full self-reduction (973–1100 K), partial self-reduction with gasification by BF gas (1100–1150 K), and gasification by BF gas (>1150 K). The CCB became effective for BF energy saving after 1000 K.

ACS Style

Huiqing Tang; Yanjun Sun; Tao Rong; Zhancheng Guo. Reaction model and reaction behavior of carbon composite briquette in blast furnace. Powder Technology 2021, 377, 832 -842.

AMA Style

Huiqing Tang, Yanjun Sun, Tao Rong, Zhancheng Guo. Reaction model and reaction behavior of carbon composite briquette in blast furnace. Powder Technology. 2021; 377 ():832-842.

Chicago/Turabian Style

Huiqing Tang; Yanjun Sun; Tao Rong; Zhancheng Guo. 2021. "Reaction model and reaction behavior of carbon composite briquette in blast furnace." Powder Technology 377, no. : 832-842.

Journal article
Published: 13 December 2020 in Metals
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One approach to reduce CO2 emission in the steelmaking industry is to recycle scrap to the blast furnace/basic oxygen furnace (BF/BOF) production system. This paper performed a numerical investigation on the BF operation with scrap charging. The investigated BF was with an inner volume of 820 m3, producing 2950 tons of hot metal per day (tHM/d). The simulated results indicated the following: Extra scrap addition in BF causes the decrease of shaft temperature, the decrease of local gas utilization, and the lowering of cohesive zone position, leading to an unstable BF running. The partial replacement of sinter with scrap in BF can mitigate the negative effects induced by scrap charging. The optimal scrap rate in the BF is 178 kg/tHM, under which the BF reaches a productivity of 3310 tHM/d, a top-gas utilization of 48.5%, and a top-gas temperature of 445 K. Compared to the base case, in the BF operation with scrap charging, the BF productivity is increased by 360 kg/tHM, its pulverized-coal rate and coke rate are decreased by 16.3 kg/tHM and 39.8 kg/tHM, respectively.

ACS Style

Zhu Liu; Zi Yu; Xuefeng She; Huiqing Tang; Qingguo Xue. Numerical Investigation of Blast Furnace Operation with Scrap Charging. Metals 2020, 10, 1666 .

AMA Style

Zhu Liu, Zi Yu, Xuefeng She, Huiqing Tang, Qingguo Xue. Numerical Investigation of Blast Furnace Operation with Scrap Charging. Metals. 2020; 10 (12):1666.

Chicago/Turabian Style

Zhu Liu; Zi Yu; Xuefeng She; Huiqing Tang; Qingguo Xue. 2020. "Numerical Investigation of Blast Furnace Operation with Scrap Charging." Metals 10, no. 12: 1666.

Conference paper
Published: 16 January 2020 in The Minerals, Metals & Materials Series
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In this research, carbon composite briquette (CCB) was prepared using ultrafine iron-oxide fine (Size = 2.0 μm), and biochar fines (Size = 45.0 μm) by cold briquetting followed by heat treatment. Anti-pulverization capacity and reduction kinetics of the prepared biochar composite briquette (BCB) under simulated blast furnace (BF) conditions were investigated. The coke saving effect of charging BCB was analyzed by numerical simulation. Results showed that the prepared BCB was with a chemical composition of 0.77 wt% metallic iron, 72.59 wt% magnetite, 11.25 wt% wustite, 4.66 wt% gangue, and 11.10 wt% carbon. BCB could keep a crushing strength after partial reaction of more than 1900 N/briquette under the simulated BF conditions. Model simulations indicated that for a BF with a productivity of 6250 ton hot metal (tHM)/day, a coke rate reduction of 20 kg/tHM could be realized by replacing 10% sinter with BCB and moreover, the status of the BF was negligibly influenced.

ACS Style

Kai Fan; Zi Yu; Huiqing Tang. Applying Biochar Composite Briquette for Energy Saving in Blast Furnace Ironmaking. The Minerals, Metals & Materials Series 2020, 115 -125.

AMA Style

Kai Fan, Zi Yu, Huiqing Tang. Applying Biochar Composite Briquette for Energy Saving in Blast Furnace Ironmaking. The Minerals, Metals & Materials Series. 2020; ():115-125.

Chicago/Turabian Style

Kai Fan; Zi Yu; Huiqing Tang. 2020. "Applying Biochar Composite Briquette for Energy Saving in Blast Furnace Ironmaking." The Minerals, Metals & Materials Series , no. : 115-125.

Journal article
Published: 25 December 2019 in Metals
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The application of carbon composite briquette (CCB) is considered to be an efficient method for achieving low-energy and low-CO2-emission blast furnace (BF) operations. In this research, a combined experimental and numerical study was conducted on the CCB reaction behavior in BF. The CCB used in this study had a composition of 20.10 wt.% carbon, 29.70 wt.% magnetite, 39.70 wt.% wüstite, and 1.57 wt.% metallic iron. Using the prepared CCB samples, isotherm reduction tests under a simulated BF atmosphere (CO-CO2-N2) were conducted and a reaction model was developed. Subsequently, the reaction behavior of CCB along the mid-radial solid descending path in an actual BF of 2500 m3 was analyzed by numerical simulations based on the experimental findings and the previous results of comprehensive BF modeling. The results of the experiments showed that the CCB model predictions agreed well with the experimental measurements. With respect to the BF, the results of the numerical simulations indicated that, along the path, before the CCB temperature reached 1000 K, the CCB was reduced by CO in the BF gas; when its temperature was in the range from 1000 to 1130 K, it underwent self-reduction and contributed both CO and CO2 to the BF gas; when its temperature was above 1130 K, it only presented carbon gasification. Moreover, these results also revealed that the reduction of iron oxide and the gasification of carbon inside the CCB proceeded under an uneven mode. The uneven radial distribution of the local reduction fraction and local carbon conversion were evident in the self-reducing stage of the CCB.

ACS Style

Huiqing Tang; Yanjun Sun; Tao Rong. Experimental and Numerical Investigation of Reaction Behavior of Carbon Composite Briquette in Blast Furnace. Metals 2019, 10, 49 .

AMA Style

Huiqing Tang, Yanjun Sun, Tao Rong. Experimental and Numerical Investigation of Reaction Behavior of Carbon Composite Briquette in Blast Furnace. Metals. 2019; 10 (1):49.

Chicago/Turabian Style

Huiqing Tang; Yanjun Sun; Tao Rong. 2019. "Experimental and Numerical Investigation of Reaction Behavior of Carbon Composite Briquette in Blast Furnace." Metals 10, no. 1: 49.

Conference paper
Published: 13 February 2019 in Proceedings of the International Conference on Martensitic Transformations: Chicago
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Developments in blast furnace (BF) sector have long focused on coke saving in ironmaking. In this research, high-carbon metallic briquette was proposed as a novel BF feeding material for coke saving in BF. The preparing condition of the proposed high-carbon metallic briquette was optimized regarding its carbon content, cold strength and crushing strength after the reaction. Gasification behaviour of the optimally prepared briquette was examined using a custom-built thermalgravimetric analysis device. Results showed that the optimal preparation condition was mhematite/mcoal = 2.0. The activation energy of carbon gasification in the briquette was 166 kJ/mol; analysis of the effective application of the briquette indicated that a suitable addition level of high-carbon metallic briquette in the ore layer in BF could suppress the lump coke gasification.

ACS Style

Huiqing Tang; Shihong Liu; Kai Fan. Preparation of High-Carbon Metallic Briquette for Coke Saving in Blast Furnace. Proceedings of the International Conference on Martensitic Transformations: Chicago 2019, 65 -73.

AMA Style

Huiqing Tang, Shihong Liu, Kai Fan. Preparation of High-Carbon Metallic Briquette for Coke Saving in Blast Furnace. Proceedings of the International Conference on Martensitic Transformations: Chicago. 2019; ():65-73.

Chicago/Turabian Style

Huiqing Tang; Shihong Liu; Kai Fan. 2019. "Preparation of High-Carbon Metallic Briquette for Coke Saving in Blast Furnace." Proceedings of the International Conference on Martensitic Transformations: Chicago , no. : 65-73.

Journal article
Published: 23 March 2018 in Metals
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Iron ore-carbon briquette is often used as the feed material in the production of sponge iron via coal-based direct reduction processes. In this article, an experimental and simulation study on the reduction behavior of a briquette that is made by hematite and devolatilized biochar fines under CO–CO2 atmosphere was carried out. The reaction model was validated against the corresponding experimental measurements and observations. Modeling predictions and experimental results indicated that the CO–CO2 atmosphere significantly influences the final reduction degree of the briquette. Increasing the reduction temperature did not increase the final reduction degree but was shown to increase the carbon that was consumed by the oxidative atmosphere. The influence of the CO–CO2 atmosphere on the briquette reduction behavior was found to be insignificant in the early stage but became considerable in the later stage; near the time of the briquette reaching its maximum reduction degree, both iron oxide reduction and metallic iron re-oxidation were able to occur.

ACS Style

Huiqing Tang; Zhiwei Yun; Xiufeng Fu; Shen Du. Modeling and Experimental Study of Ore-Carbon Briquette Reduction under CO–CO2 Atmosphere. Metals 2018, 8, 205 .

AMA Style

Huiqing Tang, Zhiwei Yun, Xiufeng Fu, Shen Du. Modeling and Experimental Study of Ore-Carbon Briquette Reduction under CO–CO2 Atmosphere. Metals. 2018; 8 (4):205.

Chicago/Turabian Style

Huiqing Tang; Zhiwei Yun; Xiufeng Fu; Shen Du. 2018. "Modeling and Experimental Study of Ore-Carbon Briquette Reduction under CO–CO2 Atmosphere." Metals 8, no. 4: 205.

Conference paper
Published: 09 February 2017 in Proceedings of the International Conference on Martensitic Transformations: Chicago
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A two-dimensional gas-solid model has been developed for examination of the blast furnace (BF) performance under hot charge operation. Simulation conditions were obtained from the actual operation conditions of the BF with inner volume of 2500 m3 and molten iron output of 6250 ton hot metal (THM) per day. The simulation results indicate that hot charge operation could change the thermal state of the BF in the region above cohesive zone (CZ) and has little influence on the thermal state of CZ zone and the region below CZ; it could intensify both the indirect reduction of the ore and the gasification of the coke in the region above the CZ. The optimum temperature for hot charge operation is 750 K, under which, a coke rate reduction of 25 kg/THM could be obtained.

ACS Style

Huiqing Tang; Xun Zhang; Lifeng Zhang; Zhilong Zhao. Influence of Hot Charge on Blast Furance Performance for Iron Making. Proceedings of the International Conference on Martensitic Transformations: Chicago 2017, 725 -733.

AMA Style

Huiqing Tang, Xun Zhang, Lifeng Zhang, Zhilong Zhao. Influence of Hot Charge on Blast Furance Performance for Iron Making. Proceedings of the International Conference on Martensitic Transformations: Chicago. 2017; ():725-733.

Chicago/Turabian Style

Huiqing Tang; Xun Zhang; Lifeng Zhang; Zhilong Zhao. 2017. "Influence of Hot Charge on Blast Furance Performance for Iron Making." Proceedings of the International Conference on Martensitic Transformations: Chicago , no. : 725-733.

Journal article
Published: 01 January 2017 in Journal of Iron and Steel Research International
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ACS Style

Hui-Qing Tang; Xiu-Feng Fu; Yan-Qi Qin; Shi-Yu Zhao; Qing-Guo Xue. Production of low-silicon molten iron from high-silica hematite using biochar. Journal of Iron and Steel Research International 2017, 24, 27 -33.

AMA Style

Hui-Qing Tang, Xiu-Feng Fu, Yan-Qi Qin, Shi-Yu Zhao, Qing-Guo Xue. Production of low-silicon molten iron from high-silica hematite using biochar. Journal of Iron and Steel Research International. 2017; 24 (1):27-33.

Chicago/Turabian Style

Hui-Qing Tang; Xiu-Feng Fu; Yan-Qi Qin; Shi-Yu Zhao; Qing-Guo Xue. 2017. "Production of low-silicon molten iron from high-silica hematite using biochar." Journal of Iron and Steel Research International 24, no. 1: 27-33.

Journal article
Published: 01 February 2016 in Journal of Iron and Steel Research International
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Phosphorus removal from oolitic high-phosphorus hematite using direct reduction followed by melting separation was investigated. At the direct reduction stage, highly volatile wood char was prepared by carbonizing jujube wood at 673 K for 2 h and was used as reducing agent. The results of the direct reduction tests show that at a temperature of 1373 K, a char mixing ratio of 0.8, and a reduction time of 10 — 25 min, the briquettes reached a metallization degree of 80% — 84% and a residual carbon content of 0.13 — 1.98 mass%. Phosphorus remained in the gangue as calcium phosphate after reduction. The results of the melting separation tests show that residual carbon in reduced briquette negatively affects the phosphorus content (w[p]) in hot metal. When the reduced briquettes obtained under the aforementioned conditions were used for melting separation, hot metal suitable for basic oxygen steelmaking (w[p]<0.4 mass%) could not be obtained from metallic briquettes with a residual carbon content more than 1.0 mass%. In contrast, it could be obtained from metallic briquettes with residual carbon content less than 0.35 mass% by mixing with 2%—4% Na2CO3.

ACS Style

Hui-Qing Tang; Yan-Qi Qin; Teng-Fei Qi; Zhi-Lei Dong; Qing-Guo Xue. Application of Wood Char in Processing Oolitic High-phosphorus Hematite for Phosphorus Removal. Journal of Iron and Steel Research International 2016, 23, 109 -115.

AMA Style

Hui-Qing Tang, Yan-Qi Qin, Teng-Fei Qi, Zhi-Lei Dong, Qing-Guo Xue. Application of Wood Char in Processing Oolitic High-phosphorus Hematite for Phosphorus Removal. Journal of Iron and Steel Research International. 2016; 23 (2):109-115.

Chicago/Turabian Style

Hui-Qing Tang; Yan-Qi Qin; Teng-Fei Qi; Zhi-Lei Dong; Qing-Guo Xue. 2016. "Application of Wood Char in Processing Oolitic High-phosphorus Hematite for Phosphorus Removal." Journal of Iron and Steel Research International 23, no. 2: 109-115.

Journal article
Published: 01 June 2015 in Journal of Iron and Steel Research International
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ACS Style

Lei Guo; Jin-Tao Yu; Jing-Kun Tang; Yin-He Lin; Zhan-Cheng Guo; Hui-Qing Tang. Influence of coating MgO on sticking and functional mechanism during fluidized bed reduction of vanadium titano-magnetite. Journal of Iron and Steel Research International 2015, 22, 464 -472.

AMA Style

Lei Guo, Jin-Tao Yu, Jing-Kun Tang, Yin-He Lin, Zhan-Cheng Guo, Hui-Qing Tang. Influence of coating MgO on sticking and functional mechanism during fluidized bed reduction of vanadium titano-magnetite. Journal of Iron and Steel Research International. 2015; 22 (6):464-472.

Chicago/Turabian Style

Lei Guo; Jin-Tao Yu; Jing-Kun Tang; Yin-He Lin; Zhan-Cheng Guo; Hui-Qing Tang. 2015. "Influence of coating MgO on sticking and functional mechanism during fluidized bed reduction of vanadium titano-magnetite." Journal of Iron and Steel Research International 22, no. 6: 464-472.

Journal article
Published: 01 November 2014 in Journal of Iron and Steel Research International
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ACS Style

Hui-Qing Tang; Long Ma; Jun-Wei Wang; Zhan-Cheng Guo. Slag/metal Separation Process of Gas-Reduced Oolitic High-Phosphorus Iron ore Fines. Journal of Iron and Steel Research International 2014, 21, 1009 -1015.

AMA Style

Hui-Qing Tang, Long Ma, Jun-Wei Wang, Zhan-Cheng Guo. Slag/metal Separation Process of Gas-Reduced Oolitic High-Phosphorus Iron ore Fines. Journal of Iron and Steel Research International. 2014; 21 (11):1009-1015.

Chicago/Turabian Style

Hui-Qing Tang; Long Ma; Jun-Wei Wang; Zhan-Cheng Guo. 2014. "Slag/metal Separation Process of Gas-Reduced Oolitic High-Phosphorus Iron ore Fines." Journal of Iron and Steel Research International 21, no. 11: 1009-1015.

Journal article
Published: 12 June 2014 in Metallurgical and Materials Transactions A
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Influence of microwave treatment on the previously proposed phosphorus removal process of oolitic high phosphorus iron ore (gaseous reduction followed by melting separation) has been studied. Microwave treatment was carried out using a high-temperature microwave reactor (Model: MS-WH). Untreated ore fines and microwaved ore fines were then characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and thermogravimetric analysis (TGA). Thereafter, experiments on the proposed phosphorus removal process were conducted to examine the effect of microwave treatment. Results show that microwave treatment could change the microstructure of the ore fines and has an intensification effect on its gaseous reduction by reducing gas internal resistance, increasing chemical reaction rate and postponing the occurrence of sintering. Results of gaseous reduction tests using tubular furnace indicate both microwave treatment and high reduction temperature high as 1273 K (1000 °C) are needed to totally break down the dense oolite and metallization rate of the ore fines treated using microwave power of 450 W could reach 90 pct under 1273 K (1000 °C) and for 2 hours. Results of melting separation tests of the reduced ore fines with a metallization rate of 90 pct show that, in addition to the melting conditions in our previous studies, introducing 3 pct Na2CO3 to the highly reduced ore fines is necessary, and metal recovery rate and phosphorus content of metal could reach 83 pct and 0.31 mass pct, respectively.

ACS Style

Hui-Qing Tang; Wei-Di Liu; Huan-Yu Zhang; Zhan-Cheng Guo. Effect of Microwave Treatment Upon Processing Oolitic High Phosphorus Iron Ore for Phosphorus Removal. Metallurgical and Materials Transactions A 2014, 45, 1683 -1694.

AMA Style

Hui-Qing Tang, Wei-Di Liu, Huan-Yu Zhang, Zhan-Cheng Guo. Effect of Microwave Treatment Upon Processing Oolitic High Phosphorus Iron Ore for Phosphorus Removal. Metallurgical and Materials Transactions A. 2014; 45 (5):1683-1694.

Chicago/Turabian Style

Hui-Qing Tang; Wei-Di Liu; Huan-Yu Zhang; Zhan-Cheng Guo. 2014. "Effect of Microwave Treatment Upon Processing Oolitic High Phosphorus Iron Ore for Phosphorus Removal." Metallurgical and Materials Transactions A 45, no. 5: 1683-1694.

Journal article
Published: 25 October 2013 in High Temperature Materials and Processes
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To develop a new method of refining silicon for use in solar cell materials, liquation refining with Al-Si alloying was proposed for purification of metallurgical grade silicon (MG-Si). The morphologies of impurities, especially for phosphorus and iron, before and after purification were analyzed. By alloying MG-Si with Al, phosphorus in MG-Si formed Al-Si-Ca-P impurity phase and iron formed skeletal-shaped α-Al8SiFe2 phase into the Al-Si eutectic phase from MG-Si with the presence of Al. It can be concluded that removal mechanism of phosphorus and iron was not only a segregating process, but also a recombining process within certain elements to form specified impurity phases. By centrifugal separation, average separation ratio was 75.73% and average recovery ratio was 82.52% for Al-45%Si system, which is better than traditional separation methods and avoids considerable loss of Al and acid. After refining for four times, mass fractions of phosphorus and boron were reduced to 0.46 × 10−6 and 0.21 × 10−6 respectively. For transition metal impurities, Fe, Ti and Mn, removal fractions of those all were more than 95%.

ACS Style

Jing-Wei Li; Zhan-Cheng Guo; Hui-Qing Tang; Jun-Cheng Li. Removal of Impurities from Metallurgical Grade Silicon by Liquation Refining Method. High Temperature Materials and Processes 2013, 32, 503 -510.

AMA Style

Jing-Wei Li, Zhan-Cheng Guo, Hui-Qing Tang, Jun-Cheng Li. Removal of Impurities from Metallurgical Grade Silicon by Liquation Refining Method. High Temperature Materials and Processes. 2013; 32 (5):503-510.

Chicago/Turabian Style

Jing-Wei Li; Zhan-Cheng Guo; Hui-Qing Tang; Jun-Cheng Li. 2013. "Removal of Impurities from Metallurgical Grade Silicon by Liquation Refining Method." High Temperature Materials and Processes 32, no. 5: 503-510.

Journal article
Published: 01 July 2013 in Journal of Iron and Steel Research International
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Growth process of iron whiskers and mechanism of CaO influence on precipitation morphology of metallic iron at the gas-solid interfaces was studied. Analytical reagents of Fe(NO3)3 and Ca(NO3)2 aqueous solution were used to prepare sheet film sample of Fe2O3-CaO by thermal decomposition at high temperature. In-situ observation was conducted using a stereo optical microscope and a hot-stage. And reduction kinetics of samples was studied by thermo gravimetric (TG) method. Some samples after reduction were analyzed by using the scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and fourier transform infrared (FT-IR) spectrometer. Results indicate that during the reduction of iron oxides with CO, metallic iron is mostly precipitated as whisker and the precipitation behavior mainly depends on reduction rate. Doping CaO can significantly increase the reduction rate and effectively change the precipitation morphology of metallic iron after the reduction. When CaO doping concentration is less than 4% (mass percent), CaO can promote whisker formation of reduced iron; as it reaches 6% (mass percent), CaO inhibits iron whiskers growth; as it is more than 8% (mass percent), no whiskers could be observed. Therefore, controlling the quantity of Ca2+ is effective to control the formation and growth of iron whiskers during gaseous reduction and thus eliminating ore grain sticking caused by intertexture of iron whiskers.

ACS Style

Zhi-Long Zhao; Hui-Qing Tang; Zhan-Cheng Guo. Effects of CaO on Precipitation Morphology of Metallic Iron in Reduction of Iron Oxides Under CO Atmosphere. Journal of Iron and Steel Research International 2013, 20, 16 -24.

AMA Style

Zhi-Long Zhao, Hui-Qing Tang, Zhan-Cheng Guo. Effects of CaO on Precipitation Morphology of Metallic Iron in Reduction of Iron Oxides Under CO Atmosphere. Journal of Iron and Steel Research International. 2013; 20 (7):16-24.

Chicago/Turabian Style

Zhi-Long Zhao; Hui-Qing Tang; Zhan-Cheng Guo. 2013. "Effects of CaO on Precipitation Morphology of Metallic Iron in Reduction of Iron Oxides Under CO Atmosphere." Journal of Iron and Steel Research International 20, no. 7: 16-24.

Journal article
Published: 01 May 2013 in Journal of Iron and Steel Research International
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ACS Style

Hui-Qing Tang; Jun-Wei Wang; Zhan-Cheng Guo; Tie Ou. Intensifying Gaseous Reduction of High Phosphorus Iron Ore Fines by Microwave Pretreatment. Journal of Iron and Steel Research International 2013, 20, 17 -23.

AMA Style

Hui-Qing Tang, Jun-Wei Wang, Zhan-Cheng Guo, Tie Ou. Intensifying Gaseous Reduction of High Phosphorus Iron Ore Fines by Microwave Pretreatment. Journal of Iron and Steel Research International. 2013; 20 (5):17-23.

Chicago/Turabian Style

Hui-Qing Tang; Jun-Wei Wang; Zhan-Cheng Guo; Tie Ou. 2013. "Intensifying Gaseous Reduction of High Phosphorus Iron Ore Fines by Microwave Pretreatment." Journal of Iron and Steel Research International 20, no. 5: 17-23.

Journal article
Published: 01 February 2013 in Journal of Iron and Steel Research International
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ACS Style

Yin-He Lin; Zhan-Cheng Guo; Hui-Qing Tang. Reduction Behavior With CO Under Micro-Fluidized Bed Conditions. Journal of Iron and Steel Research International 2013, 20, 8 -13.

AMA Style

Yin-He Lin, Zhan-Cheng Guo, Hui-Qing Tang. Reduction Behavior With CO Under Micro-Fluidized Bed Conditions. Journal of Iron and Steel Research International. 2013; 20 (2):8-13.

Chicago/Turabian Style

Yin-He Lin; Zhan-Cheng Guo; Hui-Qing Tang. 2013. "Reduction Behavior With CO Under Micro-Fluidized Bed Conditions." Journal of Iron and Steel Research International 20, no. 2: 8-13.

Journal article
Published: 01 September 2012 in Advanced Materials Research
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A comprehensive mathematical model of full blast furnace with top gas recycling was established. The model consists of the calculation equations for gas composition of four zones (hearth, belly, lower shaft. top) in the blast furnace, the thermo-chemical balance model, the energy balance model of hot stand-by zone of the blast furnace and the shaft efficiency model. By using the model, the new process was calculated. The results show that coke rate and coal rate of the new process are both 200 kg/thm, fuel rate is decreased by 22.8% compared with that of conventional blast furnace. In addition, theoretical combustion temperature decreases with increasing hearth-recycle gas quantity. Increasing of hearth-recycle gas quantity by 10 m3/thm decreases theoretical combustion temperature by 10.0 K. Furthermore, the model could be applied to calculate the operating parameters when the raw materials and fuel conditions are different, and the change laws of operating parameters under the same raw materials and fuel conditions could also be studied with this model.

ACS Style

Jia Le Meng; Zhan Cheng Guo; Hui Qing Tang. Comprehensive Mathematical Model of Full Oxygen Blast Furnace and its Solution. Advanced Materials Research 2012, 567, 178 -186.

AMA Style

Jia Le Meng, Zhan Cheng Guo, Hui Qing Tang. Comprehensive Mathematical Model of Full Oxygen Blast Furnace and its Solution. Advanced Materials Research. 2012; 567 ():178-186.

Chicago/Turabian Style

Jia Le Meng; Zhan Cheng Guo; Hui Qing Tang. 2012. "Comprehensive Mathematical Model of Full Oxygen Blast Furnace and its Solution." Advanced Materials Research 567, no. : 178-186.

Journal article
Published: 01 April 2012 in Transactions of Nonferrous Metals Society of China
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ACS Style

Jing-Wei Li; Zhan-Cheng Guo; Hui-Qing Tang; Zhi Wang; Shi-Tong Sun. Si purification by solidification of Al–Si melt with super gravity. Transactions of Nonferrous Metals Society of China 2012, 22, 958 -963.

AMA Style

Jing-Wei Li, Zhan-Cheng Guo, Hui-Qing Tang, Zhi Wang, Shi-Tong Sun. Si purification by solidification of Al–Si melt with super gravity. Transactions of Nonferrous Metals Society of China. 2012; 22 (4):958-963.

Chicago/Turabian Style

Jing-Wei Li; Zhan-Cheng Guo; Hui-Qing Tang; Zhi Wang; Shi-Tong Sun. 2012. "Si purification by solidification of Al–Si melt with super gravity." Transactions of Nonferrous Metals Society of China 22, no. 4: 958-963.