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Gong Guo Liu - One of the best experts on this subject based on the ideXlab platform.

  • Study on Utilization Technology of Vanadium Titanium Magnetite Based on the Rotary Hearth Furnace Direct Reduction Process
    Applied Mechanics and Materials, 2012
    Co-Authors: Gong Guo Liu
    Abstract:

    Through carrying out large scale of experiments, the process of ‘rotary harth furnace Direct Reduction—deep Reduction electric arc furnace—extracting vanadium from vanadium bearing slag—extracting titanium from titanium bearing slag gets through and the recovery of Fe, V and Ti reached 90.77%, 43.82% and 72.65% respectively. With the study on the laboratory experiments and industrial tests, the bottlenecks of this technology such as low metallization rate of vanadium-titanium magnetite in Direct Reduction process, low Reduction rate of vanadium in EAF, vanadium-recovery of hot metal with high silicon content, titanium-recovery of high –Mg &Al slag with titanium, and so on, have been solved. Based on this, the metallization rate of vanadium-titanium magnetite in Direct Reduction process is more than 90%, Reduction rate of vanadium in EAF deep Reduction process is more than 80%, vanadium-recovery rate in slag is more than 65%, and titanium-recovery rate in slag is more than 75%. That means good study results have been gotten. Furthermore, low-carbon pig iron with good quality in EAF steelmaking are gotten. Otherwise, V2O5 sheet and titanium products can meet the requirements of GB3283-87 and PTA121, respectively.

Liu Gong-guo - One of the best experts on this subject based on the ideXlab platform.

  • Study on applied technology of vanadium titanium magnetite based on rotary hearth furnace Direct Reduction process
    Research on Iron and Steel, 2012
    Co-Authors: Liu Gong-guo
    Abstract:

    Through a series of experiments the process of"rotary harth furnace Direct Reduction-deep Reduction electric arc furnace-extracting vanadium from vanadium bearing slag and extracting titanium from titanium bearing slag"has been developed.The recovery of Fe,V and Ti reached 90.77 %,43.82 % and 72.65 % respectively.With the study on the laboratory experiments and industrial tests,the technical bottlenecks such as low metallization rate of vanadium-titanium magnetite in Direct Reduction process,low Reduction rate of vanadium in EAF,vanadium-recovery of hot metal with high silicon content,titanium-recovery of high Mg and Al slag with titanium,and so on,have been solved.As a result,the metallization rate of vanadium-titanium magnetite in Direct Reduction process reached over 90 %,Reduction rate of vanadium in EAF deep Reduction process was over 80 %,vanadium-recovery rate in slag was up to over 65 %,and titan-ium-recovery rate in slag went to over 75 %.Furthermore,low-carbon pig iron with good quality for EAF steelmaking has also been gotten.Otherwise,V2O5 flake and titanium products can meet the requirements of YB/T5304-2006 and PTA121 respectively.

Xinxin Zhang - One of the best experts on this subject based on the ideXlab platform.

  • removal mechanism of zn pb and alkalis from metallurgical dusts in Direct Reduction process
    Journal of Iron and Steel Research International, 2014
    Co-Authors: Xue Feng She, Qing Guo Xue, Jingsong Wang, Guang Wang, Xinxin Zhang
    Abstract:

    Abstract The high-temperature tube furnace was applied to simulate the rotary hearth furnace (RHF) for the Direct Reduction of zinc-bearing dusts from steel plants. The removal mechanism of Zn, Pb and alkalis from cold bonded briquettes made by mixing metallurgical wastes, such as dust from bag house filter, OG sludge, fine converter ash and dust from the third electric field precipitator of the sinter strand, in various proportions was investigated. More than 70% of metallization rate, more than 95% of zinc removal rate, 80% of lead removal, as well as more than 80% of K and Na removal rates were achieved for the briquettes kept at 1473–1603 K for 15 min during the Direct Reduction process respectively. The soot generated in the Direct Reduction process was studied by chromatography, X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results suggested that the main phases of the soot were ZnO, KCl, NaCl and 4ZnO · ZnCl 2 · 5H 2 O. Furthermore, the content of Zn reached 64.2%, which could be used as secondary resources for zinc making. It was concluded that KCl and NaCl in secondary dust resulted from the volatilization from the briquettes, whilst ZnO and PbO were produced by the oxidation of Zn or lead vapour from briquettes by Direct Reduction.

  • Numerical Simulation of Thermal Process in Rotary Hearth Furnace for Pellet Direct Reduction
    Advanced Materials Research, 2012
    Co-Authors: Ze Yi Jiang, Xinxin Zhang
    Abstract:

    A mathematical model of complex thermal processes with combustion, radiation and flow in rotary hearth furnace (RHF) for pellet Direct Reduction is established with CFD commercial software Fluent. Temperature distribution, pressure field and flow field in RHF are simultaneously analyzed by numerical method. It has been found that the temperature distribution in the furnace can meet the need of thermal institution for pellet Direct Reduction, and great pressure field and flow field can be formed on the basis of reasonable arrangement of burner, nozzle and partition. The simulation results would be helpful for engineering design and parameter optimization of RHF.

Yang Xue-feng - One of the best experts on this subject based on the ideXlab platform.

  • Industrial Trial on Direct Reduction Iron Production by Rotary Hearth Furnace
    Ironmaking & Steelmaking, 2009
    Co-Authors: Yang Xue-feng
    Abstract:

    In order to verify the feasibility of technology and economy on the production of Direct Reduction iron by rotary hearth furnace,KISC has exploited the iron ore resources of Yunnan Province to carry out large-scaled industrial trial of RHF production,under the cooperation with Shanxi Ruito Smelting Reduction Ironmaking Company.During the industrial trial,totally 991.67 t DRI products have been produced,whose metallization rate is about 79.29%.The primary technologic and economic parameters include that reductant coal rate is 301 kg/t-DRI,coal rate of gasification furnace is 290 kg/t-DRI,and the production cost is 1 179.23 RMB/t-DRI.The experimental results will provide the valuable reference for development of rotary hearth furnace Direct Reduction technology in China.

Wang Jing-jing - One of the best experts on this subject based on the ideXlab platform.

  • Application and Development Trend of Direct Reduction Process at Rotary Hearth Furnace
    Tianjin Metallurgy, 2013
    Co-Authors: Wang Jing-jing
    Abstract:

    The paper introduces the characteristics of Direct Reduction process for rotary hearth furnace and how it processes metallurgy dust, laterite nickel ore, complex rebellious ore and V-Ti bearing magnetite ore in the production of iron bead, and analyzes the current process condition that rotary hearth furnace handles different raw materials. At present, there are still some technical difficulties in the practice of rotary hearth furnace process, and the process and equipment need to be improved. Nevertheless, the Direct Reduction technology for rotary hearth furnace helps speed up the development of Direct Reduction industry in China, and provides technical support to state iron and steel industry restructure, having profound meaning for iron and steel industry to lift comprehensive resource utilization level, reserve energy and reduce consumption, and achieve sustainable development.