钢铁钒钛

Zhou Jiacong

1996, 17(3): 1-9,18.

Abstract(50) PDF(1)

Abstract:
The four texturing processes and equipments used for cold roll were introduced. The merits and demerits of various texturing processes were analyzed. The future trend of texturing technology used for cold roll is pointed out.

STATE-OF-ART OF FOREIGN RAIL HEAT TREATMENT PROCESSES

Shan Lintian

1996, 17(3): 10-18.

Abstract(41) PDF(1)

Abstract:
The rail heat treatment methods, cooling patterns and their merits and demerits are outlined.A survey of some works using residual heat quenching process is introduced.

REDUCTION KINETICS OF PANZHIHUA ILMENITE

Sun Kang, Zhang Xuefeng

1996, 17(3): 19-23.

Abstract(61) PDF(1)

Abstract:
Proper gaseous composition was determined by means of thermodynamic analysis, based on the results of which,the kinetic behaviors of the stepwise reaction in the course of the reduction of preoxidized ilmenite, Fe³⁺→Fe²⁺ and Fe²⁺→Fe, were investigated. According to the kinetic analysis and the microstructure examination of the cross-section of partially reacted grains, the nucleation and growth of the newly formed phases were the rate-controlling step for the overall reduction of ilmenite under the experimental conditions. The apparent reaction rate constants of the two stepwise reactions were determined.

PROPERTIES OF HOT METAL IN BLAST FURNACE AT PANZHIHUA IRON AND STEEL Co.

Wen Guangyuan, Yan Yuzhang, Zhou Peitu, Zhou Yongcheng, Liao Daihua, Wang Ge

1996, 17(3): 24-29.

Abstract(73) PDF(3)

Abstract:
The experimental methods are briefly introduced to measure the properties of hot metal in blast furnace at Pangang, The influence of [C], [V], [Ti], [Si] and [S] contents in hot metal was discussed on the viscocity, melting temperature, and freezing point of hot metal. The proposals are made for controlling composition of hot metal in the blast furnace at Pangang.

A STUDY OF GRANULATION OF SINTER FEED MIXTURE ADDED WITH ORGANIC STRENGTHENER AT PANGANG

Wang Jinhui, Fu Juying, Li Sidao

1996, 17(3): 30-32,66.

Abstract(48) PDF(0)

Abstract:
The influence of organic strengthener addition was studied on the granulation of sinter feed mixture at Pangang. It was found that the organic strengthener B can improve the hyarophilicity of material surface, promoting the granulation of sinter feed mixture.

CONCENTRATION TEST OF BAIMA V-Ti-BEARING MAGNETITE

Han Qisheng

1996, 17(3): 33-38.

Abstract(43) PDF(0)

Abstract:
The grinding and magnetic concentration test of Baima V-Ti-bearing magnetite is introduced. The project was accomplished by the test group composed of Xichang Subcompany and other five departments.The results obtained provide design basis for construction of Baima V-Ti-bearing magnetite concentration plant,and are guide to production by future Baima ore concentration plant.

MEASUREMENT AND ANALYSIS OF STRAND TEMPERATURE OF PANGANG'S SLAB CONTINUOUS CASTER

Xue Nianfu, Wang Jingchuan, Lei Bo, Li Anlin, Hu Zuoxing

1996, 17(3): 39-45.

Abstract(61) PDF(1)

Abstract:
The surface temperature distribution of the strand from Pangang's slab caster has been measured under industrial production condition, A two-dimensional heat transfer mathematical model of continuous cast slab during slab cooling and freezing has been developed. The effect of continuous casting parameters on temperature conditions of the strands is described. The control of final solidification process for continuous casting and the simulated computation results of the heat-insulated transportation have been analysed and discussed.

STUDY ON AMMONIUM POLYVANADATE PRECIPITATING TECHNOLOGY FROM SOLUTION CONTAINING HIGH CONCENTRATE SODIUM VANADATE

Xia Qingrong

1996, 17(3): 46-50.

Abstract(51) PDF(2)

Abstract:
The precipitating agent(NH₄)₂SO₄ is added to the solution containing high concentrate(V30g/L) sodium vanadate to from ammonium polyvanadate. The process conditions for ammonium polyvanadate precipitating form the solution and their in fluence on the quality of V₂O₅ product have been studied. Based on results obtained from laboratory tests,it was found that the precipitating rate is more than 99%,the quality of V₂O₅ product conforms to GB3283-87 standard.

DEVELOPMENT OF NITRIDED FERROVANADIUM

Mu Hongbo, Zhou Zongquan, Chang Zhifeng

1996, 17(3): 51-55.

Abstract(45) PDF(0)

Abstract:
The small size particles produced during ferrovanadium sizing operation are formed into nitrided briquette so as to obtain nitrided ferrovanadium, The effect of ferroalloy size, pressure, nitriding temperature and nitniding time was studied on the nitrogen content of the product. The experiment shows the product of N:V>0.1 is obtained by means of optimization of process parameters.

INFLUENCE OF MATERIAL CHARACTERISTICS OF CUTTING BIADE ON PERFORMANCE OF CUTTING TOOL FOR SEMI STEEL ROLL

Song Liqiu, He Anxi, Liang Xueping, Xiong Guipu, Han Baichun, Zhang Zhikuan

1996, 17(3): 56-61.

Abstract(63) PDF(0)

Abstract:
The cutting tests were carried out for five cutting tools made of different materials. The influence of blade hardness, bending strength and hot hardness were analyzed on the stock removal rate, service life of cutting tool. It was found that the J11 cutting tool is suitable for cutting semi steel roll.

OPTIMIZATION OF CHEMICAL COMPOSITION OF VANADIUM BEARING HOT METAL IN PANGANG'S BLAST FURNACE

Guo Xinchun

1996, 17(3): 62-66.

Abstract(86) PDF(3)

Abstract:
The effect of chemical composition of vanadium bearing hot metal in Pangang's blast furnace on desulphurization of hot metal, vanadium recovery from hot metal and steelmaking process is analyzed on the basis of the metallurgical features of V-Ti-bearing magnetite and the characteristics of smelting process in blast furnace. It is suggested that every smelting step should play a positive role during V-Ti-bearing magnetite smelting process, by experimental study, the chemical composition of vanadium bearing hot metal in blast furnace is made to optimize, so as to gain more benefit.

PROBLEMS AND MEASURES TO REALIZE HIGH PERFORMANCE SLAB CONTINUOUS CASTING AT PANZHIHUA IRON AND STEEL COMPANY

Zhao Kewen

1996, 17(3): 67-74.

Abstract(56) PDF(0)

Abstract:
State-of-arts of high performance slab continuous casting at home and abroad are outlined.Based on Pangang's conditions, the problems present to realize high performance slab continuous casting are analyzed, the relative measures are pointed out.

1996 Vol. 17, No. 3