钢铁钒钛

Research on Preparing Technology of Synthetic Rutile by Hydrochloric Acid Leaching

Fu Zibi, Huang Beiwei, Wang Xuefei

2006, 27(2): 1-6.

Abstract(80) PDF(3)

Abstract:
The high grade synthetic rutile was prepared from Panzhihua ilmenite by preoxidation—fore-magnetic separation—acid leaching—filtration and lavation—calcination—after-magnetic separation.The influence of process parameters,such as ore property,leaching time,leaching temperature,hydrochloric acid conc...

Industrial Experiment of Producing Crude TiCl₄ by Fluid-bed Chlorination of Synthetic Rutile

Chen Deming, Hu Hongfei, Liao Ronghua, Zhu Shengyou

2006, 27(2): 7-11.

Abstract(71) PDF(2)

Abstract:
Titanium tetrachloride was produced in industrial experimental scale by the fluid-bed chlorinating process with the mixture of Panzhihua synthetic rutile (w(TiO₂)=91.04%,w(CaO+MgO)=0.94%) and high titanium slag (w(TiO₂)=88.05%,w(CaO+MgO)=1.85%),in which the ratio of high-grade titanium slag Panzhihu...

Applied Study on Aging Resistance of Rutile Nano-TiO₂ in HIPS Plastics

Cao Jianjun, Guo Gang, Wu Jianchun, Tu Mingjing

2006, 27(2): 12-16.

Abstract(66) PDF(1)

Abstract:
The polystyrene was filled and modified with rutile nano-TiO₂ as antiaging additives.It was noted that low molecule organic substance was ingrafted onto nano-TiO₂ after surface modification,consequently which upgrading its consistent and disperse property in HIPS resin.After 28 days exposed to xenon...

Preparation of Ultrafine Grain Austenitic High-nitrogen Stainless Steel by Spark Plasma Sintering

Zhang Xin, Liu Jing, Li Guangqiang

2006, 27(2): 17-20,47.

Abstract(68) PDF(2)

Abstract:
The SPS(spark plasma sintering) process was used to sinter 304 austenitic stainless steel powder made by milling.The sintering temperature is 900 ℃,and the sintering stress are 30 MPa and 50 MPa respectively.The phase composition and crystallite size of sintered sample were analyzed by XRD,SEM and T...

Study on Super-fine Particle of TiN Added into Molten Pure Iron

Wang Guocheng, Fang Keming, Wang Tieming

2006, 27(2): 21-25.

Abstract(70) PDF(1)

Abstract:
The ingot specimen was obtained by melting industrial pure iron in which TiN particle with 2.7 μm size was added.The existent state and chemical component of nonmetallic inclusions in the metal-phase sample were investigated with SEM and EDS.The characteristic of nonmetallic inclusions extracted fro...

Progress in Modern Ironmaking Process

Zhang Dianwei, Guo Peimin, Zhao Pei

2006, 27(2): 26-32,47.

Abstract(74) PDF(1)

Abstract:
The leading smelting reduction and direct reduction processes were reviewed.The COREX,FINEX and HISMELT processes could eliminate the pollution from coking plant due to coke-needless operation.The industrialized COREX process is owing to the mature technology of shaft furnace gas-based direct reduct...

Study on Physical Modeling of Four-strand Tundish for Bloom Continuous Caster

Chen Yuanqing, Wen Guanghua, Zhu Mingmei, Tang Ping, Yang Subo, Zhang Longchao, Jie Mingke

2006, 27(2): 33-37.

Abstract(83) PDF(1)

Abstract:
Water model test was taken to install proper flow control devices for a near T type four-strand bloom casting tundish.Two schemes,"V type baffles + dams" and "turbo stopper + dams",were optimized by orthogonal experiments under isothermal and non-isothermal conditions.The results show there are shor...

Numerical Simulation on Flow Field and Heat Transfer of Five-strand Unsymmetrical Configuration Tundish

Liu Dafang, Shi Zhe, Zhan Shuhua, Peng Shiheng, Chou Shengtao

2006, 27(2): 38-42,51.

Abstract(61) PDF(1)

Abstract:
In order to improve the billet quality by optimizing fluid flow,uniforming the molten steel temperature of each nozzle and prolonging the average residence time of near nozzles,the unsymmetrical configuration tundish in works and two optimal designs were studied by means of numerical simulation.The ...

Numerical Simulation on Stamping of Laser Tailor Welded Blank

Qiu Xiaogang, Chen Wenlong

2006, 27(2): 43-47.

Abstract(60) PDF(1)

Abstract:
The stamping process of the tailor-welded blank was simulated by DYNAFORM software.The finite element model of a boxy part was founded,and the formability of tailor-welded blank with different thickness and material was studied.Meanwhile,the influence of weld seam on forming of the part was discusse...

Metallurgical Effect of Ladle Furnace in Production Process of Pipeline Steel

Zhang Caijun, Cai Kaike, Yuan Weixia

2006, 27(2): 48-51.

Abstract(81) PDF(1)

Abstract:
The effect of desulfurizing,purifying and modifying inclusion at ladle furnace for pipeline steel was investigated.The results show the average desulfurization percentage was 55%,the removal percentage of total oxygen and micro inclusion were 43.3% and 44.4% respectively.The effects of desulfurizing...

Discussing on Technique of High Efficient and Long Lifetime for 4^# BF at PZH Steel

Diao Risheng, Ni Guoquan, Wang Ge

2006, 27(2): 52-56.

Abstract(62) PDF(1)

Abstract:
The first campaign of 4^# BF(blast furnace) at PZH Steel lasted for 5 296 days without intermediate relined,the unit yield of iron was 9 367.2 t/m³ and highest yearly average productivity exceeded 2.3 t/(m³·d).The high efficient and long production life of BF was related to furnace burden,operation,d...

Microstructure of X60 Steel after Heavy-deformation

Zong Yun, Zhao Liping, Ma Yonglin, Wang Baofeng

2006, 27(2): 57-62,68.

Abstract(72) PDF(1)

Abstract:

Single-pass deformation and double-pass hot compression test of X60 steel were tested respectively on the f130 trial two-rollers mill and the Gleeble-1500 thermo-mechanical simulator.The results show the microstructure of deformed sample consists of main polygon ferrite and a little pearlite.There a...

Discussing on Rupture Reason of Welded Rail during Transportation

Li Dadong

2006, 27(2): 63-68.

Abstract(100) PDF(2)

Abstract:
Using optical microscope and SEM metallographic techniques to inspect cracking fractures of U75V rail flash welding joint,it was found there was a lot of high-carbon martensite in center areas of rail head and base,the microstructure was normal in other areas.For the rail flash welding process,it is...

2006 Vol. 27, No. 2