2011 Vol. 32, No. 1

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Technical Discussion
Numerical Simulation on Heat Equilibrium of BF COG Injection
Li Haokun, Liu Keming, Sha Yongzhi
2011, 32(1): 1-5.
Abstract(62) PDF(2)
Abstract:
Based on the material balance and heat balance,according to lager-scale blast furnace production data,mathematical model on blast furnace with coke oven gas injection is established.The effects of COG(coke oven gas) injection quantity on theoretical combustion temperature,BF bosh gas volume,BF bosh ...
Simulation Experiment of Blast Furnace Shaft Reduction in the Condition of Oxygen Enrichment
Guo Weixing, Zhang Jianliang, Chen Yongxing, Kong Dewen, Wu Zhihong
2011, 32(1): 6-10.
Abstract(57) PDF(2)
Abstract:
The variation regularity of ore indirect reduction degree with different oxygen enrichment is researched through experiment simulation.The results of the experiment indicate that the indirect reduction degree increases with the increase of oxygen enrichment ratio,and the improvement of blast furnace...
Influence of Control of the Lower Zone on Burden Motion in Blast Furnace by DEM
Zhang Jianliang, Fan Zhengyun, Chen Yongxing, Yang Guangqing, Yang Tianjun, You Shandalang
2011, 32(1): 11-16.
Abstract(61) PDF(1)
Abstract:
The behaviour of solid flow in 4 000 m3 blast furnace was investigated by 3D-discrete element method.It is found that the increase of blast momentum and depth of raceway would not influence the structure and distribution of burden layer in the upper side of blast furnace.However,the decrease in size...
Vanadium and Titanium
Research on the Preparation of Welding Rod Coating Using Ilmenite Carbothermic Reduction
Lei Ying, Li Yu, Peng Jinhui, Li Wei, Guo Shenghui
2011, 32(1): 17-22.
Abstract(62) PDF(1)
Abstract:
The preparation process of welding rod coating by ilmenite carbothermal reduction was investigated.When the conditions are oxidized temperature 850~900℃,content of composite additive 3%~5%,reduce temperature 1 100~1 150℃ and roast time 240~270 min,it can be obtained for the reduced ilmenite of which...
Cause Analysis of Fracture for TB5 Slab
Huang Deming, Yang Xiongfei, Wei Qingfeng, Wang Huailiu, Zhou Maohua, Chen Xin, Zhao Tongxin, Xu Cong
2011, 32(1): 23-28.
Abstract(89) PDF(6)
Abstract:
Chemical composition,fracture features and microstructure of TB5 slab were investigated.The results indicated that chemical compositions of slab are uniform and meet the national requirements.The fracture feature of slab was cleavage or quasi-cleavage.There were precipitated phases in the fracture,b...
Basic Study on Vanadic Titanomagnetite Milling in Panzhihua
Li Liang, Yang Cheng
2011, 32(1): 29-33,46.
Abstract(78) PDF(1)
Abstract:
With the laser microscopic spectral analysis,spectrum quantitative analysis,electronic quantitative analysis,the chemical compositions,phase component and the storage state of usefull elements of vanadic titanomagnetite are in detailed researched.According to the compositions and phase of the vanadi...
Experiment and Research
Improvement on the Mixing Effect in Low-intensity Stirring Area for CAS Ladle by Double-nozzles Bottom Blowing Technology
Zhou Meng, He Ping
2011, 32(1): 34-40.
Abstract(88) PDF(1)
Abstract:
Based on a water model with the size of one fifth of the real CAS ladle,the improvement of the mixing effect in CAS-OB process using double-nozzles bottom blowing technology was researched by analyzing the flow field and determining the mixing time.Results show that double-nozzles bottom blowing tec...
Study on the Water Simulation of Blowing Argon in Slab Mould
Hou Zewang, Wang Yongsheng, Wang Xinhua
2011, 32(1): 41-46.
Abstract(59) PDF(1)
Abstract:
The method of water simulation of blowing argon in slab mould was set forth in the paper,and then the influence of blowing argon in slab mould on the flow field of steel/slag interface of the mould was mainly studied,and the effects of process parameters on the distribution of argon bubble were stud...
Study on Cleanliness of IF Steel Production for ASP
Yue Feng, Yuan Xiaofeng, Li Penghuan, Xiao Chaoping, Wu Weishuang
2011, 32(1): 47-52.
Abstract(64) PDF(1)
Abstract:
The total oxygen content,nitrogen content as well as evolution behavior of the inclusions during RH refining and continuous casting in IF steel production were investigated.The following results were found.Firstly,the average total oxygen content and nitrogen content in the slab were 29×10-6 and 35....
Influence of Solid Solution Temperature on Microstructures and Mechanical Properties of 00Cr25Ni7Mo3N Steel
Li Shujian, Song Zhigang, Zheng Wenjie, Tao Dongping
2011, 32(1): 53-56.
Abstract(73) PDF(1)
Abstract:
The changes of microstructrue and mechanical properties of 00Cr25Ni7Mo3N duplex stainless steel have been studied at different solid solution temperatures by using metallographic image analysis.The experimental results showed that in this paper:①A large number of σ phase on phase boundary of austeni...
Effect of Al on Inclusions in 430 Stainless Steel Containing Titanium
Shi Xiaofang, Cheng Guoguang, Zhao Pei
2011, 32(1): 57-61.
Abstract(90) PDF(1)
Abstract:
Experiments were carried out in laboratory to investigate the effect of Al content on the Ti/Al inclusion in 430 stainless steel containing titanium.It was found that the size of the inclusions increased with the Al content increasing.And some solid solution of Ti2O3 and Al2O3 were observed in high ...
Microstructure and Toughness in the Coarse Grain Region of Low Carbon Bainite High Strength Steel Plate for Q690CFD
Dong Xianchun, Zhang Xi, Chen Yanqing
2011, 32(1): 62-66.
Abstract(75) PDF(3)
Abstract:
The microstructure and toughness of the coarse-grained heat-affected zone(CGHAZ) of low carbon bainite high strength steel for Q690CFD with different welding processes were investigated by thermal simulation with a Gleeble-2000 thermal simulator.The experimental results indicate that the lath marten...
Effect of Lepidolite on Dephosphorization of CaO-FeO-CaF2 Slags in the Hot Metal Pretreatment
Li Jin, Wang Yicheng, Wang Minglin, Chou Shengtao
2011, 32(1): 67-70.
Abstract(69) PDF(1)
Abstract:
At 1 340~1 360℃ under laboratory conditions,the research on the dephosphorization of the CaO-FeO-CaF2 slags additive lepidolite in hot metal pretreatment has been completed.Influences of lepidolite additive quantity on the slag melting point and dephosphorization effects have been researched.The res...
Influence of Mn-Si-Ti-Mg Complex Deoxidation on the Oxide Inclusions of Steel
Yang Fei, Li Guangqiang, Song Yu
2011, 32(1): 71-78.
Abstract(53) PDF(1)
Abstract:
From the viewpoint of oxide metallurgy,influence of Mn-Si-Ti-Mg complex deoxidation on the oxide inclusions of steel was studied.SEM and Qwin image analysis software were used to investigate the morphology,chemical compositions and size distribution of inclusions in steel in each complex deoxidation...
Production Practice
Optimization of Secondary Cooling System of Slab Continuous Casting for Ship-plate Steel CCSA
Dong Jinming, Wang Huixia, Chou Shengtao, Gan Yong
2011, 32(1): 79-83,88.
Abstract(100) PDF(1)
Abstract:
For the higher incidence of transverse corner cracks of CCSA slab in a steelmaking plant,it is analyzed that the main reason of transverse corner cracks is unreasonable temperature distribution caused by secondary cooling system,based on the research of high temperature mechanical property of CSSA a...
Optimization of Continuous Casting Parameters for High Carbon Steel Billet and Control of Central Segregation of Billets
He Hongyin, Liu Haitao, Chen Weiqing, Wang Guojun, Fu Jun, Liu Huijie
2011, 32(1): 84-88.
Abstract(67) PDF(1)
Abstract:
The effects of casting speed,secondary cooling intensity,F-EMS current intensity and stirring frequency on the central segregation of high carbon steel SWRH82B billets,which were produced by billet casters using both M-EMS and F-EMS,were studied.It was shown that compared with manganese and chromium...
Analysis on Formation Causes of Crack of H-type Steel
Wang Shuoming, Ding Zhijun, Yu Heng, Zhang Caijun
2011, 32(1): 89-92.
Abstract(51) PDF(1)
Abstract:
Formation reasons of cracks in H beam steel produced by semi-open way in a large H beam steel factory of Hebei were researched.26 specimens of representative crack in the plant were selected.The study shows that:the crack of stomach plank are mainly caused by inclusions in steel,and T[O] in steel is...
2011, 32(1): 93-94.
Abstract(54) PDF(1)
Abstract:

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