1997 Vol. 18, No. 4

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COUNTERMEASURES AND IMPLEMENTATION OF SULFUR CONTENT REDUCTION IN HOT METAL AT PANGANG
Ceng Shuping
1997, 18(4): 1-4.
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A summary is made on the comprehensive treatment measures practiced recently for the reduction of [S] in hot metal at Pangang,which does not only emphasize the improvement of blast furnace operation, but also realizes a comprehensive control to decrease [S],therefore better quality of hot metal and economic result have been achieved.
IT'S BETTER FOR PANGANG TO DEVELOP LONG STEEL RAIL
Zhan Jinlong, Dang Yuchun
1997, 18(4): 5-8.
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The present paper discusses the necessity to develop long steel rail in the aspects of application and production,the feasibility for Pangang to produce long rail and the scheme to modify the existing line for long rail production.
QUALITY OF STEEL FOR HEAVY RAIL NEEDS IMPROVING AT PANGANG
Dang Yuchun, Yang Jian, Zhao Rongjie
1997, 18(4): 9-13.
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With a review to improve the rail steel quality,the present paper illustrates the quality status of heavy rail steel based on the current technological conditions at Pangang, pointing out that only through technical modernization and by adopting a series of advanced technology such as secondary steelmaking and bloom continuous casting with the support of scientific equipment installation and technical process,can the quality of steel for heavy rail be actually improved to catch up with the first class level of the world.
FACTORS AFFECTING QUALITY OF FERRIC IRON POWDER AND COUNTERMEASURES AT COLD ROLLING PLANT OF PANGANG
Shu Qingbo, Ren Hai, Huang Yongdong
1997, 18(4): 14-16,49.
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Based on the process of ferric iron powder production with hydrochloric acid pickling solution at Cold Rolling Plant of Pangang. the effects of temperature, concentrated acid density,coal gas calorific value and composition etc. On the quality of ferric iron powder are discussed. It is considered that the quality of ferric iron powder can only be guaranteed under the conditions that the temperature is around 630~670℃, the concentrated acid density 1.3~1.4kg/m3, the coal gas calorific value 1900kJ/Nm3 and air-coal ratio 0.9~2.0. It is critical to decrease silicon content in ferric iron powder for the improvement of product quality.
TESTS ON IMPROVEMENT OF COKE QUALITY BY OPTIMIZING COAL MATCH
Luo Guiru
1997, 18(4): 17-20.
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Facing the tendency of annual degradation of coking coal quality at Panzhihua Iron and Steel Corp.,a series of tests are conducted in a 200kg coke oven to satisfy the requirements of coke quality for the blast furnace operation with pulverized coal injection. As a result,some measures for the improvement of coke quality have been proposed such as the proper addition of fat coal,rational use of suburban coal and control of blending fineness.
DEVELOPMENT AND APPLICATION OF INLAY CLAD GUIDE
Shen Xiuping, Dai Huayun, You Dayong, Duan Huicai
1997, 18(4): 21-25.
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The present paper introduces a guide suitable for section steel production, which is built-up and mechanically composed of high temperature resistant component and matrix material with good toughness. This guide has the advantages of structural flexibility and easy on-line disassemble and mounting. The practice has shown that the service life of the inlay clad guide is 10 times longer than that of the original integral cast steel guide and a better economic and social benefit has been achieved.
MEASUREMENT OF UPPER AND LOWER LIMIT OF HOT RETURN SINTER LEVEL IN BIN
Zheng Huijun, Diao Yuansheng, You Dayong, Lei Xiuhua, Li Xiangan, Ceng Yongfu
1997, 18(4): 26-29.
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A alarming system used for measuring upper and lower limit of hot return sinter level in bin at Sintering Plant of Pangang was developed. The technical problems present in measuring upper and lower limit of hot return sinter level in bin were solved. The alarming system runs reliably,measurement cost is lower and measurement error is small. This system is suitable for measuring upper and lower limit of high temperature powder and granular material in bin.
PLASMA HEATING FACILITIES OF TUNDISH AND THEIR CURRENT APPLICATION AT HOME AND ABROAD
Zhang Huiyi, Xu Dejun
1997, 18(4): 30-34.
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The present paper introduces the principle and function of plasma heating for tundish of continuous casting machine, the structure of heating facilities mainly used worldwide, the technical support from manufacturers, investment comparison and the status of application at home and abroad.
TECHNICAL STATUS OF RH DEGASSING FOR MOLTEN STEEL TREATMENT
Wang Mingdong, Li Yangzhou, Zhong Jianli
1997, 18(4): 35-41.
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The present paper describes the status and development tendency of RH vacuum degassing for molten steel and the main features of some RH processes. In the light of current situation at Pangang, the necessity to absorb the imported RH-MFB technology and the due development are discussed.
ON-LINE MEASUREMENT TECHNIQUE OF STEEL RAIL
Tang Lei, Chen Qi
1997, 18(4): 42-46.
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Based on the research and summary of great amount of literature,the status and development of on-line measurement technique for steel rail production at home and abroad are comprehensively introduced.
DIGITALIZATION MODIFICATION OF LOOP DRIVE SYSTEM FOR FINISHING MILL L5
Liu Chungui, Li Zhongwen
1997, 18(4): 47-49.
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The present paper introduces the running status and system structure of loop drive control system at 1450 Hot Strip Plant of Pangang before and after modification,for which the purpose and significance are also discussed.
MAIN DRIVE MONITORING SYSTEM FOR FINISHING STAND AT HOT STRIP PLANT OF PANGANG
Li Xiaoping
1997, 18(4): 50-51,55.
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The present paper introduces the composition,working principle and actual application of main drive monitoring system for finishing stand at Hot Strip Plant of Pangang.
TECHNICAL MODERNIZATION OF COAL-FIRED REHEATING FURNACE AT 410 PLANT
Guan Lixin, Liu Zicheng, Wei Jiajun, Hu Zuoxing
1997, 18(4): 52-55.
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With regard to the problem that the bottom pipe of coal-fired reheating furnace is frequently burned bent and the bloom reheating temperature is relatively low at 410 Plant,the rational layout of evaporative cooling system pipeline for the reheating furnace and the height of furnace hearth are analyzed with the modification measures raised accordingly, after which the bottom pipe-burned-bent has never occurred since February 1994 and the reheating capacity has been improved.
MODIFICATION OF JOINT BETWEEN ADOBE COLLECTOR AND DRIER AT MEISHAN FAIENCE TILEYARD
Feng Zhaotang
1997, 18(4): 56-58,71.
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The present paper introduces the modification of joint between adobe collector and drier,pointing out that the adobe damaging caused by the height difference of joint can be avoided by adopting unfired tile lifter and the data obtained can be used for the similar equipment modification.
Zhang Minyi
1997, 18(4): 59-62.
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Zhao Xiaohong
1997, 18(4): 63-65.
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Xu Yanqiong, Yang Yun
1997, 18(4): 66-67.
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Fu Xi
1997, 18(4): 68-69.
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Wang Ying
1997, 18(4): 70-71.
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Address：Editorial Department of Iron Vanadium Titanium Steel, Technology Development Research Center, Research Institute of Panzhihua Group Co., Ltd., No. 90 Taoyuan Street, East District, Panzhihua City, Sichuan Province (617000)

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