钢铁钒钛

Sulfuric Acid Dissolution of Panzhihua Ilmenite Under Simultaneous Milling

Li Gaolan, Du Changshan, Lü Li, Wu Guilan, Liang Bin, Wu Pan, Li Chun, Zheng Qi

2012, 33(4): 1-6.

Abstract(72) PDF(2)

Abstract:
The feasibility of rapid leaching of Panzhihua ilmenite in sulfuric acid through combined milling under industrially employed acid/ore mass ratio was investigated.The effects of the stirring speed of attritor,milling ball/ore mass ratio,reaction temperature and sulfuric acid concentration on the dis...

Study on Roasting of Pangang Converter Vanadium Slag with Soda in Laboratory

Li Qianwen, Liu Fengqiang, Deng Xiaobo, Hu Li

2012, 33(4): 7-11.

Abstract(83) PDF(2)

Abstract:
Under laboratory conditions,the main effect factors of soluble vanadium recovery from converter vanadium slag was investigated.The main factors included soda-vanadium-ratio,slag-residue-ratio,maximum roasting temperature,keep time at maximum roasting temperature.The results showed that in the condit...

Research on New Antibacterial Flame Retardant TiO₂/Mg（OH）₂ Composite Material

Li Xue, Li Yanping, Yang Pengfei, Meng Bo, Liu Yunyi

2012, 33(4): 12-17.

Abstract(60) PDF(1)

Abstract:
A new TiO₂/Mg(OH)2 multifunctional composite material was prepared by ammonia bubbling process.Nitrogen and iron codoped TiO₂ powder were obtained by the hydrothermal method using titanium tetrabutoxide as precursor and ammonium nitrate and Iron(Ⅲ) nitrate nonahydrate as nitrogen and iron source.The...

Effect of Phase and Morphology of the TiO₂ Nanotube Array on Its Photocatalytic Activity

Tian Ang, Xue Xiangxin, Liu Chuangwei, Ru Hongqiang

2012, 33(4): 18-23.

Abstract(53) PDF(1)

Abstract:
TiO₂ nanotube array（TNT） coatings were anodized on the titanium surface,and the effect of the phase and morphology of the TiO₂ on the photocatalytic activity was researched.The studies indicate that the photodegradation of organic contaminant by TNT depends on the hydroxyl radical which is synthesiz...

Influence of Iron Coating on Chroma of Titanium Dioxide

Wu Jianchun

2012, 33(4): 24-27.

Abstract(58) PDF(1)

Abstract:
Complexional titanium dioxide was prepared by surface treatment technology using TiO₂ and FeCl₃ as raw materials.Chroma was used to characterize the samples.In the experiment,the factors which affect the color of the sample,including coating quantity,coating temperature,aging time,and calcining temp...

Study on Direct Reduction of Carbon-containing Pellet Made of Vanadium-bearing Titaniferous Magnetite

Cao Mingming, Zhang Jianliang, Xing Xiangdong, Wen Yongcai, Wang Chunlong

2012, 33(4): 28-33.

Abstract(71) PDF(2)

Abstract:
On the basis of RHF technology,high-temperature calcination experiments were carried out in the laboratory to directly reduce carbon-containing pellet made of vanadium bearing titaniferous magnetite.Through XRD analysis,the effects of carbon proportion（w_C/w_O）,reduction temperature and reduction time...

Experimental Study on Sticking Prevention in Fludized Bed Reduction of Iron Ore Powder

Zhou Yong, Zhang Tao, Tang Hailong

2012, 33(4): 34-39.

Abstract(97) PDF(5)

Abstract:
The sticking of iron ore powder restricts the reduction of iron ore in fludized bed.The effects of sticking prevention by adding inert material into fludized bed,and the relationship between defluidization and composition and size of iron ore,reduction temperature and atmosphere,metallization rate,a...

Design of Flow Control Devices for Seven-strand Tundish Based on Numerical Simulation

Xu Hailun, Ma Chunwu, Li Zhi, Sun Tiehan, Han Zhanguang

2012, 33(4): 40-46.

Abstract(56) PDF(1)

Abstract:
Fluid flow behavior of molten steel in tundish is a key factor which can influence solidification of the subsequent casting blank.Therefore,it is very necessary to design suitable flow control devices for tundish.The present research is based on the seven-strand "T" shaped tundish.According to the c...

Industrial Test of Slagging Process in Large-sized Combined Blowing BOF

Cai Wei, Yang Libin, Wang Dong, Yu Wentao, Zheng Congjie, Tong Puqiao

2012, 33(4): 47-50.

Abstract(52) PDF(1)

Abstract:
By analyzing the composition of liquid steel and the composition and petrographical characteristics of slag,the variation of slag composition during oxygen blowing,and the slagging processes and dephosphorization with the two slagging methods(scheme A and B) applied to the 210 t combined blowing BOF...

Experimental Studies on Low Phosphorus Steel Produced from Top and Bottom Combined Blown Converter

Liao Peng, Qin Zhe, Hou Zewang, Zhang Xingzhong, Qiu Shengtao

2012, 33(4): 51-55.

Abstract(64) PDF(1)

Abstract:
This paper studies the low phosphorus steel smelting process in the top and bottom combined blown converter.After dephosphorization pretreatment of hot metal and then deslagging in semisteel procedure,the same converter was used to smelt ultralow phosphorus steel with the remaining part of slag.The ...

Study on Technologies of Reducing Ferrous Materials Consumption throughout Steelmaking Process

Li Jianquan, Ge Wensun

2012, 33(4): 56-61.

Abstract(70) PDF(1)

Abstract:
In consideration of equipments and production process in the vanadium recovery ＆ steelmaking plant of Pangang,the influencing factors of ferrous materials consumption in steel production process have been analyzed.On this basis,the processes of desulphurization and V-extraction are optimized to redu...

Theoretical Research on the Effects of Oxygen Enrichment and Pulverized Coal Injection on Performance of Tuyere Raceway Zone in Blast Furnace

Ma Shiwei, Qiu Guibao, Lü Xuewei, Deng Qingyu, Wang Hua

2012, 33(4): 62-67.

Abstract(78) PDF(1)

Abstract:
The effects of both the oxygen enrichment and pulverized coal injection(PCI) on the performance of tuyere raceway zone in 4^# blast furnace of Pangang,especially on the theoretical combustion temperature and composition of the gas,have been investigated by using the thermodynamics software FactSage.T...

Study on Technologies of Dephosphorization during Semisteel Smelting in Converter

Zeng Jianhua, He Wei, Chen Yong

2012, 33(4): 68-72.

Abstract(69) PDF(1)

Abstract:
To address the problems occurring during semisteel smelting in converter in Pangang,such as slow slagging,low rate of dephosphorization,and high rate of rephosphorization after converter smelting,corresponding measures have been taken to optimize slagging process,oxygen supply,bottom argon supply,an...

Effect of Titanium on the Precipitation Behavior of Inclusions in Niobium Microalloyed Steel

Zhao Baohua, Ke Changming, Zhong Xiandai, Xie Jun, Zhu Chengyi, Zheng Jianxin

2012, 33(4): 73-80.

Abstract(68) PDF(2)

Abstract:
Experiments were conducted in a high frequency vacuum induction furnace to smelt titanium and niobium microalloyed steel with different titanium addition at 1 550 ℃ under Ar atmosphere,and then the samples underwent heat treatment.The effect of titanium additive amount on composition,microstructure,...

Development of 80 mm Thick Q460 Grade TMCP Plate with High Toughness for Engineering Machinery

Li Defa, Wang Shisen, Xing Shuqing, Xiong Tao

2012, 33(4): 81-85.

Abstract(60) PDF(1)

Abstract:
Based on low carbon and Cr-Mo with powerful carbide added,the 80mm thick Q460 grade plate for engineering machinery use was successfully trial-produced by TMCP process.Ultrafine grain and precipitated phase and bainite were fully taken advantage of to increase strength.By means of metallographic exa...

Investigation on the Influencing Factors of Carbon and Sulfur Segregations and Rational Process Parameters of 82B Hard Wire Steel

Wang Hongbin, Tang Haiyan, Li Jingshe, Wang Qingguo

2012, 33(4): 86-91.

Abstract(70) PDF(1)

Abstract:
The behavior of carbon and sulfur segregations of 82B hard wire steel produced under different continuous casting conditions has been systematically analyzed based on field tests and laboratory analysis.The results show three factors including superheat,casting speed and F-EMS which influence segreg...

Analysis on the Cause of Splitting during Tensile Test of High Strength Steel EH36 for Ship Plate

Shuai Yong, Chen Yuanqing, Fu Jun, Qiu Shengtao, Liao Peng

2012, 33(4): 92-95,100.

Abstract(71) PDF(1)

Abstract:
Serious spitting phenomenon occurred in the center of the plate during tensile test of high strength steel EH36 for ship plate use.Metallographic examination and scanning electron microscope have been taken to observe the fracture and section of specimen.And then the causes of splitting have been id...

Study on Surface Linear Defects of Non-oriented Electrical Steel Strip

Qi Haifeng, Tang Guangbo, Wang Xiaochun, Li Jiguang

2012, 33(4): 96-100.

Abstract(128) PDF(2)

Abstract:
The surface "dark line" and longitudinal hair crack in W600 non-oriented electrical steel strip are observed by SEM.The cause of surface "dark line" defects found in the after coated strip is that foreign substances are embedded into the scratches of strip surface caused by the graphite bottom roll ...

Research on Banded Microstructure of Steel for Oil Casing Pipe

Shen Yongge, Chen Liansheng, Song Jinying, Tian Yaqiang

2012, 33(4): 101-106.

Abstract(66) PDF(2)

Abstract:
Center segregation in strand for J55 oil casing pipe is analyzed and the influences of heating temperature, finish rolling temperature, deformation rate in noncrystallization area, cooling rate after finish rolling and coiling temperature etc.on the reduction or elimination of banded microstructure ...

2012, 33(4): 107-108.

Abstract(53) PDF(1)

Abstract:

2012 Vol. 33, No. 4