钢铁钒钛

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(105) 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(66) 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...

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(101) 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(65) 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...

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...

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(73) 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...

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(70) 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(68) 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(78) 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(60) 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:

2014 Vol. 35, No. 2