Thirty Years of Electroslag Remelting Steel Production at the “Dneprospetsstal” Plant

1991 ◽  
pp. 73-74
Author(s):  
I. G. Vodeniktov ◽  
Yu. G. Gabuev
Author(s):  
V. A. Spirin ◽  
V. E. Nikol’skii ◽  
D. V. Vokhmintsev ◽  
A. A. Moiseev ◽  
P. G. Smirnov ◽  
...  

At steel production based on scrap metal utilization, the scrap heating before charging into a melting facility is an important way of energy efficiency increase and ecological parameters improving. In winter time scrap metal charging with ice inclusions into a metal melt can result in a considerable damage of equipment and even accidents. Therefore, scrap preliminary drying is necessary to provide industrial safety. It was shown, that in countries with warm and low-snow climate with no risk of scrap metal icing up during its transportation and storing in the open air, the basic task being solved at the scrap drying is an increase of energy efficiency of steelmaking. InRussiathe scrap metal drying first of all provides the safety of the process and next - energy saving. Existing technologies of scrap metal drying and heating considered, as well as advantages and drawbacks of technical solutions used at Russian steel plants. In winter time during scrap metal heating at conveyers (Consteel process) hot gases penetrate not effectively into its mass, the heat is not enough for evaporation of wetness in the metal charge. At scrap heating by the furnace gases, a problem of dioxines emissions elimination arises. Application of shaft heaters results in high efficiency of scrap heating. However, under conditions of Russian winter the upper scrap layers are not always heated higher 0 °С and after getting into a furnace bath the upper scrap layers cause periodical vapor explosions. The shaft heaters create optimal conditions for dioxines formation, which emit into atmosphere. It was shown, that accounting Russian economic and nature conditions, the metal charge drying and heating in modified charging buckets by the heat of burnt natural gas or other additional fuel is optimal. The proposed technical solution enables to burnt off organic impurities ecologically safely, to melt down ice, to evaporate the wetness in the scrap as well as to heat the charge as enough as the charging logistics enables it. The method was implemented at several Russian steel plants. Technical and economical indices of scrap metal drying in buckets under conditions of EAF-based shop, containing two furnaces ДСП-100, presented.


Author(s):  
Nguyen Thi Kim Huyen

Applying the Material Flows Cost Accounting method in Thai Nguyen steel enterprises is one of the solutions to improve the efficiency in the production process, using input materials, and environmental performance, as well as to measure more correctly the production costs based on the change of the price calculation basic. Identifying the factors which affect the decision on applying MFCA to the accounting process of Thai Nguyen steel production enterprises by a direct survey is carried out with 119 accountants and managers working at 13 steel enterprises. The results show that applying MFCA to the accounting process in these enterprises depends on the strategies, capacities, the accounting system of those enterprises, and the system of legal documents related to environmental accounting.


Alloy Digest ◽  
1994 ◽  
Vol 43 (6) ◽  

Abstract LUKENS HARDWEAR 500F steel was developed from armor steel production technology to have as low a carbon equivalent as possible, consistent with meeting both surface and through-thickness hardness. Uses include truck body liners, bucket lips and conveyor troughs. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on wear resistance as well as forming and joining. Filing Code: SA-476. Producer or source: Lukens Steel Company.


Alloy Digest ◽  
1994 ◽  
Vol 43 (5) ◽  

Abstract LUKENS HARDWARE 400F steel was developed from armor steel production technology to have as low a carbon equivalent as possible, consistent with meeting both surface and through-thickness hardness. Uses include truck body liners, bucket lips and conveyor troughs. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on wear resistance as well as forming and joining. Filing Code: SA-475. Producer or source: Lukens Steel Company.


2012 ◽  
Vol 48 (1) ◽  
pp. 1 ◽  
Author(s):  
Kuangdi XU ◽  
Lijun XIAO ◽  
yong GAN ◽  
Liu LIU ◽  
Xinhua WANG

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