钢铁钒钛

THERMODYNAMIC CALCULATING MODEL FOR THE SLAG SYSTEM MnO-TiO₂

Cheng Guoguang, Zhang Jian

1994, 15(3): 1-3.

Abstract(65) PDF(1)

Abstract:
In accordance with the coexistence theory of slag structure and phase diagrams, the structural units of MnO-TiO₂ slag system have been determined as simple ions Mn²⁺,O^2- and molecules TiO₂, 2MnO·TiO₂, MnO· TiO₂ and the thermodynamic calculating model of mass action concentrations has been deduced.The results show the calculated values N_MnOare in agreement with measured α_MnO. Therefore the above model is reasonable. Furthermore the changes of △H^M△G^M with ∑n_MnO are also calculated.

REDUCTION OF TITANIUM DIOXIDE IN SMELTING SILICO-TITANIUM FERROALLOY USING TITANIUM-BEARING SLAG BY D. C. SILICOTHERMIC PROCESS

Li Zushu, Xu Chushao, Li Zaimiao, Zhou Youquan

1994, 15(3): 4-9.

Abstract(56) PDF(1)

Abstract:
It is studied in this paper that the physico-chemical phenomena of TiO₂ reduction in molten slag under the influence of D. C., and TiO₂ reduction in smelting Si-Ti ferroalloy using slag containing titania by D. C. silicothermic process is referred to due to silicothermic reduction, electrolysis, carbothermic reduction, gravity settling, electrophoresis of metal drops and convection in melting bath. Under the experimental conditions it is conducted to smelt Si-Ti ferroalloy using titanium-bearing slags from blast furnace by electrolysis, silicothermic process and D. C. silicothermic process, and TiO₂ reduction laws in slags under three conditions is achieved. It is shown that the reduction rate, reduction reaction rate constant, metal recovery and titanium recovery by D. C. silicothermic process is higher than that by silicothermic process.

EXPERIMENTAL STUDY ON SINTERING V-BEARING TITANIFEROUS MAGNETITE WITH LOW CONSUMPTION AND HIGH PRODUCTIVITY IN PANZHIHUA IRON AND STEEL Co.

San Jiguo, Ren Zhiguo, Liu Shugui

1994, 15(3): 10-15.

Abstract(45) PDF(1)

Abstract:
An investigation has been made to intensify the sintering production,decrease the solid fuel consumption,enhance productiyity and improve low temperature reduction degradation index(RDI)of the sinter of vanadium-bearing titaniferous magnetite. New operation regulations suiting the sintering production of V-bearing titaniferous magnetite in Panzhihua I & S Co. and the best method to optimize the RDI of the sinter are propased.

TRIAL RESEARCH ON RAISING MOLTEN STEEL TEMPERATURE BYADDING LOW GRADE SILCON CARBIDE INTO THE CONVERTER IN PANZHIHUA IRON AND STEEL Co.

Ge Wensun, Du Dexin, Liu Zhenjing

1994, 15(3): 16-19,26.

Abstract(44) PDF(2)

Abstract:
Low grade silcon carbide is an effective raw material to raise molten steel temperature during the steelmaking in the converter. The results of industrial experiments show that molten steel temperature raising is from 40. 3℃ to 70. 3℃(average 48. 4℃)when low grade silcon carbide is added 8. 0kg per tone steel.Moreover,the addition of low grade silcon carbide can cut dowtt the content of total iron in slag by 1.3%;is beneficial to the slag formation and slag desulphurization,and to decrease the slag erosion of the refractory. This paper also gives the region of the molten semi-steel temperature and its carbon content whether to add or not to add low grade silcon carbide into the converter when the continiued cast steel is smelted in Panzhihua lron & Steel Co

THE PRESENT SITUATION OF ADAPTING THE MOLTEN STEEL QUALITY OF THE CONTINIUED CAST AND THE WAYS TO DEAL WITH A SITUATION IN PANZHIHUA IRON AND STEEL CO.

Wang Jian, Du Dexin, Zhang Bo, Xu Weihua

1994, 15(3): 20-26.

Abstract(55) PDF(0)

Abstract:
This paper reviewed the state-of-arts of steelmaking technology in the converters in Panzhihua lron and Steel Co.,analysed the main problems of the present technology which is not suitable to smelt continuous cast steel, and put forward the measures to solve the problems. The industrial experiments show the measures proposed ore to meet the needs of smelting the molten steel used for continuous casting.

STUDY ON COMPREHENSIVE UTILIZATION OF THE WASTE OBTAINED IN PROCESSING V-SLAG

Li Gang, Yang Yangjun

1994, 15(3): 27-33.

Abstract(37) PDF(0)

Abstract:
The waste obtained in processing V-slag is used as the raw material. Metal iron and V-slag are recoveried in electric arc furnace. The metal iron is dlrectly smelted to pure iron by desulphurization and dephosporizing,the V-slag is used as the raw material to produce V₂O₅.The successful trial provides a new method for comprehensive utilization of the waste.

PILOT TEST FOR HONGGE V-BEARING TITANIFEROUS MAGNETITE DRESSING

Han Qisheng

1994, 15(3): 34-38,68.

Abstract(48) PDF(0)

Abstract:
The pilot test for Hongge V-bearing titaniferous magnetite crushing,grinding and dressing conducted in 410 pilot plant,Panzhihua Iron and Steel Co.,and a consecutive trial operations of the comprehensive recovery of titanium,cobalt and nickle are introduced. The test results are analysised and discussed.

A HYDRAULIC SYSTEM FOR DRIVING“501”SLIDING GATE VALVE OF PANZHIHUA IRON AND STEEL Co.

Luo Yuyuan, Wang Zengming

1994, 15(3): 39-44.

Abstract(80) PDF(0)

Abstract:
The paper describes a new type hydraulic system for driving "501" sliding gate valve of Panzhihua Iron and Steel Co., The system's operation principle design feature and the choice of basic elements or equipment are introduced in detail.

IMPROVEMENT OF RUNNER REFRACTORIES FOR THE B.Fs.PANZHIHUA IRON AND STEEL Co.

Liu Hongyun, Ma Yonghua

1994, 15(3): 45-49.

Abstract(48) PDF(0)

Abstract:
Theoritical investigation has been conduted on the Al₂O₃-SiC-C refractory material used for iron runner and its ingredients have been developed in the lab. Site tests indicates that when trial material is used,the throughput of hot metal iron and service life were three time as much as those of the refractory home made in the company and a unit consumption one third of the latter,which have come up to the advanced level of the domestic steelmakers. Significant social and economic benirits can be obtained.

SELECTIVE BENEFICIATION OF PANZHIHUA ILMENITE BY GL 2TYPEØ600mm SPIRAL CONCENTRATOR

Zhao Hongwen

1994, 15(3): 50-53.

Abstract(66) PDF(1)

Abstract:
Since the traditional ore dressing facilities, ie, FIX-1 type Ø600mm spiral concentrator and Ø1200mm spiral chute were used by the titanium concentration plant, Panzhihua Iron and Steel Group to recover the primary granular ilmenite from the tailings following magnetic seperation of the iron ore dressing plant, the plant have accumulated a wealth of production experience. However, the GL-2 type Ø600mm spiral concentrator, which is characterized by greater capacity, high separation rate, no washing water and less land occupancy, may substitute the existing spiral concentrator.

THE STATE-OF-ART OF CONTINOUS CASTING AND ROLLING OF THIN SLABS AND CONTINOUS CASTING AND COLD ROLLING OF THIN STRIPS

Liu Shaotang

1994, 15(3): 54-63.

Abstract(43) PDF(0)

Abstract:
The development of thin slab continous casting and rolling technologies throughout the world has been reviewed.The "CSP" technology employed by Nucor Steel of the U.S.and ISP adopted by Arvedi of Italy have been examined with an introduction to the equipments,plant layout and advantages of the production line of thin slab continous casting and rolling process. The technology of thin strip direct casting under development has been introduced in respect to the current trend of worldwide experimental study and the technical performance of the two roll thin slab caster widely adopted in most countries.Current state of the technologies in China has been briefly reviewed.

STEEL REHEATING TECHNOLOGIES OF SECONDARY REFINING

Tan Hongxing

1994, 15(3): 64-68.

Abstract(41) PDF(0)

Abstract:
The molten steel reheating technologies applied to secondary refining in the world were introduced such as RH-OB/PB,RH-KTB,CAS-OB,VOD/VOH,IR-UT,LF,VAD,DC Arc reheating,induction reheating, plasma reheating,or electroslag reheating and fuel-oxygen reheating etc. The results of these process were also described.Then author for the application of molten steel reheating according to steel-making process of Pangang(Group)Company.

1994 Vol. 15, No. 3