2014 Vol. 35, No. 2

Separating and Extracting of Vanadium and Titanium
Research on Simultaneous Extraction of Vanadium and Chromium from High Chromium Vanadium Slag by Sub-molten Salt Method
Pan Ziwei, Zheng Shili, Wang Zhongxing, Wang Shaona, Du Hao, Zhang Yi, Xie Hua
2014, 35(2): 1-8. doi: 10.7513/j.issn.1004-7638.2014.02.001
Abstract(103) PDF(3)
Abstract:
In order to realize efficient and low-cost low-temperature simultaneous extraction of vanadium and chromium from high chromium vanadium slag,NaOH sub-molten salt liquid phase oxidation was employed according to phase of the slag.After the influences of reaction temperature of NaOH sub-molten salt sy...
Research on Leaching Vanadium from Vanadium and Titanium-bearing Tailings Produced in Reduction,Grinding and Separation of Vanadium-bearing Titaniferous Magnetite
Guo Yufeng, Sui Yulei, Jiang Tao, Lü Yanan
2014, 35(2): 9-14. doi: 10.7513/j.issn.1004-7638.2014.02.002
Abstract(110) PDF(2)
Abstract:
A comparative research on the two vanadium extraction processes of sodium roasting and acid leaching is carried out in order to find a suitable way to extract vanadium from vanadium and titaniumbearing tailings generated in reduction,grinding and separation of vanadium-bearing titaniferous magnetite...
Comparative Research on Extracting Vanadium from Vanadium Slag by Molten Method and Roasting Method
Zheng Quan, Song Wenchen, Li Kun, Li Hong
2014, 35(2): 15-19. doi: 10.7513/j.issn.1004-7638.2014.02.003
Abstract(71) PDF(1)
Abstract:
Comparative experiments of extracting vanadium by the molten method'(namely,the method of direct oxidation and sodium treatment of molten vanadium slag to produce water-soluble sodium vanadate) and roasting method were done in the laboratory for maximizing vanadium yield from molten vanadium slag wi...
Research on Preparation and Application of High-density Granular V2O3
Chen Donghui, Li Lanjie, Shi Lixin
2014, 35(2): 20-25. doi: 10.7513/j.issn.1004-7638.2014.02.004
Abstract(65) PDF(0)
Abstract:
The industrial vanadium trioxide is powdery with bulk density of 0.6~1.2 g/cm3,which is not good for recovering vanadium in the following vanadium alloy smelting process.Due to the high melting point of V2O3,only the physical method could be employed to increase the V2O3 density.In this paper,the no...
Application of Vanadium and Titanium
Optimization Experiments on Preparation of TiO2 as a SCR Catalyst Carrier from Ilmenite
Zhang Qianyun, Zhong Zhaoping, Yao Jie, Zhu Lin
2014, 35(2): 26-30. doi: 10.7513/j.issn.1004-7638.2014.02.005
Abstract(99) PDF(1)
Abstract:
Preparation of titanium dioxide(TiO2) by solid-phase digestion of ilmenite in sulfuric acid has a high acidolysis rate.Since Ethylene Diamine Tetraacetic Acid(EDTA) is a widely used complexing agent,appropriate amount of EDTA added during hydrolysis of titaniferous solution can be beneficial to the ...
Preparation of Porous TiO2 Photocatalyst by Hydrothermal Crystallizing Process
Pu Hong, Tian Congxue
2014, 35(2): 31-34,55. doi: 10.7513/j.issn.1004-7638.2014.02.006
Abstract(68) PDF(1)
Abstract:
Porous TiO2 photocatalyst was prepared via hydrothermal crystallization of industrial metatitanic acid,and the effects of crystallization time on structures and properties of porous TiO2 were also investigated.The samples so prepared were characterized by XRD,SEM,XPS,FT- IR and nitrogen absorption-d...
Research on Thermal Oxidation/Vacuum Diffusion Treatment on Surface of Ti6Al4V Alloy and Its Effect on Wear Resistance
Zhou Yin, Wang Shuqi, Zhang Qiuyang, Wang Lan
2014, 35(2): 35-39,67. doi: 10.7513/j.issn.1004-7638.2014.02.007
Abstract(142) PDF(1)
Abstract:
Ti6Al4V alloy was processed with thermal oxidation at 800℃ for 1 h or at 900℃ for 15 min, then processed with vacuum diffusion at 850℃ for 20 h.At 25℃ and 400℃,dry sliding wear tests were performed for the alloy that underwent thermal oxidation at 900℃ for 15 min and vacuum diffusion at 850℃ for 20 ...
Changes of Microstructures and Cold Drawing Properties of V-N Microalloyed Tire Cord Steel
Wan Baoyi, Liu Hongyu, Zhou Peng, Liu Jianhua, Chen Xiaolong
2014, 35(2): 40-45. doi: 10.7513/j.issn.1004-7638.2014.02.008
Abstract(64) PDF(0)
Abstract:
To explore the possibility of replacing C with V and the effect of V and N on cementite during cold drawing process,traditional grade 70 tire cord steel was microalloyed with V and N.Tensile properties and torsional properties were measured for specimens at different cold drawing strains; the precip...
Resources Environment and Energy Saving
Analysis on the Feasibility of Co-production of Sulfuric Acid, Titanium Pigment and Iron and Steel in Panzhihua
Du Jianqiao, Xu Yuting
2014, 35(2): 46-50. doi: 10.7513/j.issn.1004-7638.2014.02.009
Abstract(97) PDF(2)
Abstract:
Aiming at utilizing wastes and by-products,the conception of 'co-production of sulfuric acid, titanium pigment and iron and steel' is put forward based on the existing iron & steel and titanium pigment industries in Panzhihua,and the feasibility of reutilizing by-products and wastes generated in...
Analysis on Electricity Consumption for Titanium Slag Smelting with Prereduced Concentrate Pellets
Han Kexi
2014, 35(2): 51-55. doi: 10.7513/j.issn.1004-7638.2014.02.010
Abstract(73) PDF(2)
Abstract:
Electricity consumption for titanium slag smelting with Panzhihua titanium concentrates is higher than that of the international advanced smelting technologies.However,it can be significantly reduced as prereduced Panzhihua titanium concentrates are used for the smelting.According to basic data obta...
Technical Review
Empirical Prediction Model of the Incremental Strengthening of Ferrite /Pearlite Steels with Additions of Vanadium and Nitrogen
Robert J Glodowski
2014, 35(2): 56-61. doi: 10.7513/j.issn.1004-7638.2014.02.011
Abstract(72) PDF(0)
Abstract:
Several prediction models of V-N strengthening have been published and used over the course of many years of vanadium microalloying experience.The basis and origin of a proven strength model previously distributed is reviewed and explained.Inherent in the prediction accuracy of the model is the assu...
Ferrous Metallurgy and Materials
Study on the Moulding Process of Vanadium-bearing Titaniferous Magnetite Concentrate Pellets Containing Carbon
Li Junhan, Qiu Kehui, Yang Shaoli
2014, 35(2): 62-67. doi: 10.7513/j.issn.1004-7638.2014.02.012
Abstract(69) PDF(3)
Abstract:
By taking polyvinyl alcohol as binding agent and vanadium-bearing titaniferous magnetite concentrate and pulverized coal as raw materials,the influences of moisture,moulding pressure,the mass ratio of ore to coal and the amount of binding agent added on the metallization ratio of the pellets during ...
Research on Effect of Additives on Viscosity of Titanium-bearing Blast Furnace Slag of Chengde Steel
Cui Shiqiang, Lü Qing, Feng Shuai, Sun Yanqin, Chen Shujun, Li Fumin, Wan Xinyu, Kang Zepeng
2014, 35(2): 68-72. doi: 10.7513/j.issn.1004-7638.2014.02.013
Abstract(64) PDF(3)
Abstract:
According to current smelting conditions of Chengde Steel and by taking its BF slag as samples,effects of the addition of CaF2,MnO,Li2O,MgO or Cr2O3 to final slag on melting properties of the slag were studied with melt property tester RTW.The result shows that all of the additives are helpful to re...
Research on the Production of Low-phosphorus Steels with Semi-steel in Xichang Vanadium & Steel
Qing Jiasheng
2014, 35(2): 73-77. doi: 10.7513/j.issn.1004-7638.2014.02.014
Abstract(117) PDF(4)
Abstract:
In order to meet the strict requirements of low- phosphorus steels,a suitable process was invented by Xichang Vanadium & Steel to smelt low-phosphorus high quality steels with semi-steel.By optimizing the oxygen lance of converter smelting process,selecting reasonable combined blowing and slag m...
Influence of Carbon Addition on Mineralogical Structures and Metallurgical Properties of Sinter Prepared with Fine-grained Hematite Concentrates
Liu Lina, Han Xiuli, Li Zhimin, Duan Shan
2014, 35(2): 78-81. doi: 10.7513/j.issn.1004-7638.2014.02.015
Abstract(69) PDF(0)
Abstract:
The mineralogical structures and metallurgical properties of sinter prepared with fine-grained hematite concentrates and different amount of carbon were systematically studied.The results show that where the proportion of Sijiaying iron ore is 100%,with the increase of carbon content,the mineralogic...
Research on the Influence of Preheating on Combustion Characteristics of Pulverized Coal
Liu Ran, Wang Xingjuan, Liang Chunchao, Lü Qing, Zhang Shuhui, Du Linsen, Feng Shuai
2014, 35(2): 82-86. doi: 10.7513/j.issn.1004-7638.2014.02.016
Abstract(76) PDF(1)
Abstract:
By using two kinds of pulverized coal(namely,bitumite JM and anthracite FD) for BF injection from Handan Iron and Steel Co.,Ltd.as raw materials,the differential thermal analysis(DTA) of the pulverized coal preheated under different temperature was carried out and its combustion ratio determined.Exp...
Study on Reducing Dephosphorization of Hot Metal Containing Nb by CaC2 Addition
Lu Jianfa, Zhao Zengwu, Xu Zhangyin
2014, 35(2): 87-91. doi: 10.7513/j.issn.1004-7638.2014.02.017
Abstract(64) PDF(0)
Abstract:
A study on reducing dephosphorization of Nb-bearing hot metal by adding CaC2 was carried out with carbon contents in the hot metal of 0.5% to 1.9%,and hot metal's temperature of 1 550℃.Effects of the amount of dephosphorizing agent added and its adding way,the carbon content in the hot melt,and the ...
Experimental Research on RH Desulfurization Slag for Non-oriented Electrical Steel Smelting
Qin Zhe, Liao Jianjun, Lai Chaobin, Chou Shengtao
2014, 35(2): 92-96. doi: 10.7513/j.issn.1004-7638.2014.02.018
Abstract(68) PDF(4)
Abstract:
Experiments on desulfurization of molten steel using CaO-Al2O3-SiO2-MgO based desulfurization slag was carried out in a 15 kg vacuum induction furnace.The effects of desulfurization slag basicity,MI, Al2O3 and CaF2 on desulfurization of molten steel were studied.The results show that with the increa...
Simulation of Free Surface in a Continuous Casting Mould and Structural Optimization of a Submerged Entry Nozzle
Zhang Caijun, Liu Tao, Wang Ang, Gu Kejing, Zhu Liguang
2014, 35(2): 97-102. doi: 10.7513/j.issn.1004-7638.2014.02.019
Abstract(95) PDF(2)
Abstract:
By taking a continuous casting mould for rectangular slab production in a certain steel mill as the research subject,flow and flow fields of the free surface were systematically analyzed,flow conditions affected by different exit area ratio,immersion depth,and inclination of the submerged entry nozz...
Study on Internal Quality Control of 20CrMnTiH Steel Strands
Wang Qingchun, Chen Tianming, Chen Liang, Yang Wenzhong
2014, 35(2): 103-107. doi: 10.7513/j.issn.1004-7638.2014.02.020
Abstract(58) PDF(2)
Abstract:
According to the requirements of 20CrMnTiH steel,effects of key parameters including casting peed,the mould's current intensity for electromagnetic stirring(EMS) and intensity of secondary cooling on internal quality of strands were studied.The results show that controlling the casting speed at 1.2~...
Study on the Behavior of Non-metallic Inclusions during Calcium Treatment of SPHC Steel
Zhang Tongbo, Li Jingshe, Chen Yongfeng, Sun Liyuan
2014, 35(2): 108-112,124. doi: 10.7513/j.issn.1004-7638.2014.02.021
Abstract(69) PDF(0)
Abstract:
The behavior of inclusions during calcium treatment of SPHC steel has been researched by systematic sampling during the process of refining and continuous casting.The results show that before Ca treatment,the Al2O3inclusions in steel mainly exist in triangular or irregular forms.After LF refining, m...
Effect of Thermal Deformation on Continuous Cooling Transformation Behaviors of V-N Microalloyed Steel
Zhao Baochun, Zhao Tan, Li Guiyan, Lu Qiang
2014, 35(2): 113-117. doi: 10.7513/j.issn.1004-7638.2014.02.022
Abstract(59) PDF(0)
Abstract:
Simulation tests were performed on a Gleeble-3800 thermo-mechanical simulator to study the transformation behaviors of V-N microalloyed steel without deformation or under multipass deformation conditions.The corresponding static and dynamic CCT diagrams of the tested steel were made by analyzing the...
Cause Analysis and Study on Hole Defects of Cold-rolled Sheets
Chen Liansheng, Yang Dong, Song Jinying, Tian Yaqiang, Zhao Yuan
2014, 35(2): 118-124. doi: 10.7513/j.issn.1004-7638.2014.02.023
Abstract(224) PDF(15)
Abstract:
The causes and influencing factors of hole defects emerging in cold rolling process were analyzed by means of SEM and EDS.The result shows that the causes of holes defects include inclusions(the main cause),impressed foreign matters,and roll abnormity etc.The hole defects caused by inclusions are ch...
2014, 35(2): 125-126.
Abstract(53) PDF(0)
Abstract: