The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Ust Beijing - One of the best experts on this subject based on the ideXlab platform.
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Numerical Simulation of Direct Reduction Process of Carbon-Bearing Pellets
Journal of University of Science and Technology Beijing, 1998Co-Authors: Ust BeijingAbstract:Abstract Based on equations of mass conservation, energy conservation and chemi- cal reaction rates, a mathematical model of Direct Reduction Process of carbon-bearing pellets was developed. The calculated results of mathematical model agree with the experi-- mental results. Numerical simulation results are shown as follows: Furnace temperature is the most important factor affecting on the Reduction rate of pellets, so that it is neces- sary to heat carbon-bearing pellets under high furnace temperature. Either for larger pellets or for smaller pellets high metallization can be obtained when the heating time is long enough, although Reduction rate of larger pellets is lower than of smaller pellets during the beginning period. For realizing higher metallization and faster Reduction rate, the pellets should contain su
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Direct Reduction Process of Pellet Containing Carbon with Addition of Zn-Pb-Bearing Iron and Steel Plant Dust
Journal of University of Science and Technology Beijing, 1997Co-Authors: Ust BeijingAbstract:The study on Direct Reduction Process of pellet containing carbon with the addition of Zn-Pb-bearing iron and steel plant dust shows that the Reduction time and pellet basicity have obvious effect on the evaporation of lead and final metalliztion degree of pellet.The Reduction temperature has significantl influences on the lead and zinc evaporation ratios and on final metallization degree of pellet.The optimum parameparameters obtained are Reduction temperature of 1 250℃, Reduction time of 25 minutes and pellet basicity of 0.9.
Seto Tjahyono - One of the best experts on this subject based on the ideXlab platform.
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Effect of Reduction Process parameter in Direct Reduction Process of laterite to produce substitute pig iron for thin wall ductile iron material
Advanced Materials Research, 2014Co-Authors: Johny Wahyuadi Soedarsono, Adji Kawigraha, Rianti Dewi Sulamet-ariobimo, Andi Rustandi, Seto Tjahyono, Rosoebaktian Simarmata, Aidil ZamriAbstract:Many parameters are involved in Reduction Process but carbon availability, Process temperature and Process time hold the role. This research conducted to find the relation effects of three main factors mention previously. This research used lateritic rocks from Sebuku Island as the iron source and coal as carbon source. Particle size with the highest Fe content is used for Reduction Process. Variations in Reduction Process made in mass ratio, Process temperature, and Process time. The mass ratios are 1:4 and 1:5. The Process temperatures are 900OC and 1000OC. Process times are 10, 20, and 30 minutes. Characterization Process used XRD and XRF. The results show that carbon availability is important and combinations of higher carbon supplies and Process temperature are able to prevent further oxidation.
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Effect of Carbon Content in Direct Reduction Process of Limonite Iron Oxide to Produce Pig Iron Substitute for Thin Wall Ductile Iron Process
Advanced Materials Research, 2014Co-Authors: Johny Wahyuadi Soedarsono, Vita Astini, Fahmi Fazri, Adji Kawigraha, Rianti Dewi Sulamet-ariobimo, Andi Rustandi, Seto TjahyonoAbstract:Quality molten metal needed to produce thin wall ductile iron (TWDI). Pig iron, as the major base material to produce quality molten metal, due to its high price, has been change with scraps. The use of scrap as major base material associates with more cleaning and chemical composition adjustment. The ITmk3 technology in iron making has successfully produced iron nugget. Iron nugget can be use to substitute pig iron due to its quality that is comparable to pig iron but lower in price. This research conducted to see the effects of carbon content in producing iron nugget. Limonite iron ores used in this research are part of laterite rocks taken from Sebuku Island in South Kalimantan, Indonesia. Variation made to weight of carbon mixed with laterite. Heating temperatures of Direct Reduction Process are 700°C, 900°C, and 1000°C. The Process times are 10, 20, and 30 minutes. XRF used in analysing Fe content in laterite and XRD is used in analysing result of Direct Reduction Process. The result shows that increasing carbon content to certain condition will increase the rate of gasification Process during Direct Reduction. The increase of gasification rate will result to higher Fe formation.
Johny Wahyuadi Soedarsono - One of the best experts on this subject based on the ideXlab platform.
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Effect of Reduction Process parameter in Direct Reduction Process of laterite to produce substitute pig iron for thin wall ductile iron material
Advanced Materials Research, 2014Co-Authors: Johny Wahyuadi Soedarsono, Adji Kawigraha, Rianti Dewi Sulamet-ariobimo, Andi Rustandi, Seto Tjahyono, Rosoebaktian Simarmata, Aidil ZamriAbstract:Many parameters are involved in Reduction Process but carbon availability, Process temperature and Process time hold the role. This research conducted to find the relation effects of three main factors mention previously. This research used lateritic rocks from Sebuku Island as the iron source and coal as carbon source. Particle size with the highest Fe content is used for Reduction Process. Variations in Reduction Process made in mass ratio, Process temperature, and Process time. The mass ratios are 1:4 and 1:5. The Process temperatures are 900OC and 1000OC. Process times are 10, 20, and 30 minutes. Characterization Process used XRD and XRF. The results show that carbon availability is important and combinations of higher carbon supplies and Process temperature are able to prevent further oxidation.
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Effect of Carbon Content in Direct Reduction Process of Limonite Iron Oxide to Produce Pig Iron Substitute for Thin Wall Ductile Iron Process
Advanced Materials Research, 2014Co-Authors: Johny Wahyuadi Soedarsono, Vita Astini, Fahmi Fazri, Adji Kawigraha, Rianti Dewi Sulamet-ariobimo, Andi Rustandi, Seto TjahyonoAbstract:Quality molten metal needed to produce thin wall ductile iron (TWDI). Pig iron, as the major base material to produce quality molten metal, due to its high price, has been change with scraps. The use of scrap as major base material associates with more cleaning and chemical composition adjustment. The ITmk3 technology in iron making has successfully produced iron nugget. Iron nugget can be use to substitute pig iron due to its quality that is comparable to pig iron but lower in price. This research conducted to see the effects of carbon content in producing iron nugget. Limonite iron ores used in this research are part of laterite rocks taken from Sebuku Island in South Kalimantan, Indonesia. Variation made to weight of carbon mixed with laterite. Heating temperatures of Direct Reduction Process are 700°C, 900°C, and 1000°C. The Process times are 10, 20, and 30 minutes. XRF used in analysing Fe content in laterite and XRD is used in analysing result of Direct Reduction Process. The result shows that increasing carbon content to certain condition will increase the rate of gasification Process during Direct Reduction. The increase of gasification rate will result to higher Fe formation.
Wang Dongya - One of the best experts on this subject based on the ideXlab platform.
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Direct Reduction Process of Pellet Containing Carbon with Addition of Zn- Pb-Bearing Iron and Steel Plant Dust
1997Co-Authors: Wang DongyaAbstract:The study on Direct Reduction Process of pellet containing carbon with the addition of Zn-Pb-bearing iron and steel plant dust shows that the Reduction time and pellet basicity have obvious effect on the evaporation of lead and final metallization degree of pellet.The Reduction temperature has significantl influences on the lead and zinc evaporation ratios and on final metallization degree of pellet. The optimum Process parameters obtained are Reduction temperature of 1 250 ℃,Reduction time of 25 min and pellet basicity of 0.9.
Jue Tang - One of the best experts on this subject based on the ideXlab platform.
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Effects of smelting parameters on the slag/metal separation behaviors of Hongge vanadium-bearing titanomagnetite metallized pellets obtained from the gas-based Direct Reduction Process
International Journal of Minerals Metallurgy and Materials, 2018Co-Authors: Cong Feng, Jue TangAbstract:Smelting separations of Hongge vanadium-bearing titanomagnetite metallized pellets (HVTMP) prepared by gas-based Direct Reduction were investigated, and the effects of smelting parameters on the slag/metal separation behaviors were analyzed. Relevant mechanisms were elucidated using X-ray diffraction analysis, FACTSAGE 7.0 calculations, and scanning electron microscopy observations. The results show that, when the smelting temperature, time, and C/O ratio are increased, the recoveries of V and Cr of HVTMP in pig iron are improved, the recovery of Fe initially increases and subsequently decreases, and the recovery of TiO2 in slag decreases. When the smelting CaO/SiO2 ratio is increased, the recoveries of Fe, V, and Cr in pig iron increase and the recovery of TiO2 in slag initially increases and subsequently decreases. The appropriate smelting separation parameters for HVTMP are as follows: smelting temperature of 1873 K; smelting time of 30–50 min; C/O ratio of 1.25; and CaO/SiO2 ratio of 0.50. With these optimized parameters (smelting time: 30 min), the recoveries of Fe, V, Cr, and TiO2 are 99.5%, 91.24%, 92.41%, and 94.86%, respectively.
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effects of smelting parameters on the slag metal separation behaviors of hongge vanadium bearing titanomagnetite metallized pellets obtained from the gas based Direct Reduction Process
International Journal of Minerals Metallurgy and Materials, 2018Co-Authors: Cong Feng, Jue Tang, Man Sheng Chu, Zhenggen LiuAbstract:Smelting separations of Hongge vanadium-bearing titanomagnetite metallized pellets (HVTMP) prepared by gas-based Direct Reduction were investigated, and the effects of smelting parameters on the slag/metal separation behaviors were analyzed. Relevant mechanisms were elucidated using X-ray diffraction analysis, FACTSAGE 7.0 calculations, and scanning electron microscopy observations. The results show that, when the smelting temperature, time, and C/O ratio are increased, the recoveries of V and Cr of HVTMP in pig iron are improved, the recovery of Fe initially increases and subsequently decreases, and the recovery of TiO2 in slag decreases. When the smelting CaO/SiO2 ratio is increased, the recoveries of Fe, V, and Cr in pig iron increase and the recovery of TiO2 in slag initially increases and subsequently decreases. The appropriate smelting separation parameters for HVTMP are as follows: smelting temperature of 1873 K; smelting time of 30–50 min; C/O ratio of 1.25; and CaO/SiO2 ratio of 0.50. With these optimized parameters (smelting time: 30 min), the recoveries of Fe, V, Cr, and TiO2 are 99.5%, 91.24%, 92.41%, and 94.86%, respectively.
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Fundamental Study on Application of Gas-Based Shaft Furnace Direct Reduction Process to High Efficiency and Clean Utilization of Paigeite
Advanced Materials Research, 2011Co-Authors: Zhao Cai Wang, Jue Tang, Man Sheng Chu, Qing Jie Zhao, Xiang Xin XueAbstract:The paigeite resources are abundant in China, but most of them are difficult to be utilized efficiently because of the current technical problems on industrial practice. It is necessary to perfected and innovated for comprehensive utilization of paigeite. The new Process of gas-based shaft furnace Direct Reduction-electric furnace smelting separation provides a new way to efficient and clean comprehensive utilization of paigeite resources. In this paper, the pellets are prepared from boron-bearing iron concentrate. The mechanisms of roasting, the rules of Reduction, and the properties of Reduction swelling are also investigated. And then the pellets after Reduction are smelted and separated in electric furnace to study the properties of products and analyze the feasibility and superiority of new technique. The results showed that boron-bearing iron concentrate is a kind of good raw material for pelletizing Process. The properties of boron-bearing pellets after roasting for 20 min at 1200°C could meet to the requirements of gas-based shaft furnace Direct Reduction Process, which exhibited fast reaction rate, good Reduction swelling properties and high compressive strength both before and after Reduction. With the new Process, the efficient separation of boron and iron can be realized. The high boron grade and high activity of boron-rich slag obtained from new Process can be used Directly in boric acid manufacture. The new Process shows excellent tech-economy feasibility to achieve efficiency and clean comprehensive utilization of paigeite resources.