钢铁钒钛

STUDY ON SYSTEM OF SLAG FOR SLAG SPLASHING ON BOF AT PZH STEEL

WEN Yong-cai

2002, 23(4): 1-5.

Abstract(57) PDF(3)

Abstract:
According to the steel grade produced at PZH Steel, the effect of main constitution in converter slag on slaging, desulphurizing and dephosphorizing in steelmaking process and on slag's viscosity were studied. The controlled range of (CaO/SiO₂), TFe and MgO in slag was put forward. Based on the trial in industry, the system of slag was set up fitting to steelmaking with semi-steel and slag splashing at the same time.

CORROSION BEHAVIOR OF MgO-C BRICK AND Al₂O₃-C BRICK IMMERSED IN HIGH TITANIA SLAG

XU Yuan, LIU Qing-cai, CHEN Deng-fu, BAI Chen-guang, ZOU De-yu

2002, 23(4): 6-9.

Abstract(42) PDF(4)

Abstract:
The corrosion behavior of MgO-C brick and Al₂O₃-C brick immersed in high titania slag was investigated. The influence of process parameters, such as TiO₂ content in slag, slag temperature, the rotary velocity between slag and refractory, slag basicity and the ratio of iron bath, on the corrosion rate was examined and analyzed.

DEVELOPMENT OF NANOMETER V₂O₅ CATALYST

WANG Jin-chao, CHEN Hou-sheng, WU Jian-chun, YANG Shao-li

2002, 23(4): 10-13.

Abstract(52) PDF(2)

Abstract:
The technical process of preparation nanometer V₂O₅ by Sol-Gel method using industrial V₂O₅ as raw materials was introduced. A nanometer V₂O₅ catalyst was made from this nanometer V₂O₅. The result shows that the catalytic activity of nanometer V₂O₅ catalyst is better than that of now trade standard.

METHODS OF PREPARING HIGH GRADE TITANIA FEEDSTOCK FROM PANZHIHUA TITANIUM CONCENTRATE

DENG Guo-zhu, WANG Xue-fei

2002, 23(4): 14-17.

Abstract(68) PDF(4)

Abstract:
Three methods of preparing high grade titania feedstock from Panzhihua titanium concentrate are reviewed. These methods include:(a)preparing synthetic rutile by leaching the titanium concentrate with hydrochloric acid, (b)preparing upgraded slag(UGS) by leaching the slag made from smelting the titanium concentrate with hydrochloric acid, and (c)preparing synthetic rutile by leaching the titanium concentrate with sulphate acid. The advantages and disadvantages of these methods are also presented.

COMPARISION OF PREDICTION MODELS FOR SKIN ROLLING FORCE

LIU Ying, CHEN Da-rong, QIN Li

2002, 23(4): 18-21.

Abstract(40) PDF(2)

Abstract:
Aimed at specially characteristics of skin pass and the consist proportion of lubricant, the study of predicting skin pass rolling force was carried out by theoretical analysis and experimental investigations with rigid, elastoplastic, complete sliding and boundary lubrication model. It was shown that the elastic deformation of rollers and steel sheet has great effect on the calculation value of rolling force when the gauge reduction was less than 5%, so these deformation should not be ignored. The calculation value of rolling force using boundary lubrication elastoplastic model is more accurate than that using boundary lubrication rigid model comparing with the experimental value.

EFFECT OF VN12 ALLOYING ON PROPERTIES OF 09V STEEL

LIU Ming

2002, 23(4): 22-26.

Abstract(42) PDF(2)

Abstract:
The effect of nitrogen on the strength and aging characteristic of steel was discussed when the alloy additive changed from ferrovanadium to VN12. The results show the strength of the steel alloying by VN12 increases comparing with the steel alloying by ferrovanadium, while the adding nitrogen in steel wouldn't influence the aging characteristic of steel.

APPLICATION OF VN ALLOY IN PRODUCTION OF HRB400 REINFORCED BAR

FENG Yun-li, QI Zhang-fa

2002, 23(4): 27-30.

Abstract(40) PDF(2)

Abstract:
The application of VN alloy in the production of HRB400 reinforced bar was introduced. The properties and cost of 400MPa grade bar alloyed with FeV50 and VN were compared. The influence of VN alloy on the properties and microstructure was also studied.

DEVELOPMENT OF DEEP DRAWING SKIN-PASSED HOT-DIP GALVANIZING SHEET STEEL FOR APPLIANCE

ZHENG Zhi-wang

2002, 23(4): 31-35.

Abstract(51) PDF(2)

Abstract:
The development of deep drawing skin-passed hot-dip galvanizing sheet steel according DIN EN10142 standard at PZH Steel was introduced. The properties and the application in appliance of deep drawing hot-dip galvanizing sheet using low carbon Al-killed steel and IF steel as base metal were described.

DEVELOPMENT OF HP295 HOT ROLLED PLATE FOR LPG CYLINDER OF AUTOMOBILE

SONG Li-qiu, TANG Li, WANG Yi-cheng, CHEN Su-kun, LIU Jian-hua, LI Qing-chun

2002, 23(4): 36-40.

Abstract(58) PDF(2)

Abstract:
HP295 hot rolled plate is one of the major materials used for the Liquid Petrol Gas(LPG) steel cylinder of automobiles. The combined properties of HP295 hot rolled plate was studied based on the analysis of the structure of LPG cylinder used for automobile. Testing results suggested that:the cold drawability and formability of HP295 hot rolled plate are improved by the effective control of silicate inclusions, composite oxide and sulfide in steel.

TECHNOLOGIES FOR IMPROVING QUALITY OF CONTINUOUSLY CAST HEAVY RAIL STEEL BLOOM

CHEN Yong, LI Gui-jun, GOU Shu-yun

2002, 23(4): 41-46.

Abstract(29) PDF(3)

Abstract:
The major problems in the continuous casting process of heavy rail steel blooms are briefly reviewed. On the basis, the key technologies at home and abroad for eliminating center segregation in heavy rail steel blooms and improving cleanliness of the heavy rail steel are presented.

RESEARCH REVIEW ABOUT RELATIONSHIP BETWEEN PERFORMANCE AND COMPONENTS OF CONTINUOUS CASTING POWDER

CENG Jian-hua

2002, 23(4): 47-52,58.

Abstract(52) PDF(2)

Abstract:
The different continuous casting parameters have different requisition on the powder's physical performance. Because proper components are the base of powder's physical performance, only understand how each components affect performance can we develop powder to ensure it can be satisfied with continuous casting parameter. The research results acquired in recent 20 years domestically and abroad are introduced, which is about the influence of each component on melting temperature, viscosity, melting speed, solidification temperature and sinter properties. The research localization and something that should be taken in future are also presented.

COMPREHENSIVE REVIEW OF METALLURGICAL PROPERTIES OF LF REFINING SLAG

ZHAO He-ming, XIE Bing

2002, 23(4): 53-58.

Abstract(75) PDF(2)

Abstract:
The research current of the foaming properties and the desulphurizing properties of LF refining slag which were effected by composition of slag had been reviewed. The development of LF refining slag was also discussed, which would be helpful for the research and the application of LF refining slag in future.

TECHNICAL MODERNIZATION OF NO.1 BLAST FURNACE RELINING AT PZH STEEL

LIU Shu-fang

2002, 23(4): 59-64.

Abstract(37) PDF(2)

Abstract:
The technical modernization of No.1 blast furnace in the relining for the fourth generation lifetime at PZH Steel was introduced. The modernization includes:increasing the capacity of blast furnace to 1280m³ and optimizing the technical-and-economic indexes. The blast furnace bottom adopted high density fire-clay bricks, water cooling device, pure copper cooling stave and Ukrainian large-scale cooling modules. 4 remodelled internal combustion hot stoves were installed. The ability of transmitting raw material was increased. The process control of blast furnace employed DCS system. Meanwhile, an intelligence automatic control system was used to optimizing the blast furnace operation. After the remodification,the equipment and automatic control of the blast furnace reach to national advanced level.

2002 Vol. 23, No. 4