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• W2564496412 abstract "Nowadays the trend has been toward diminution ironmaking and blast furnaces are removed partially from service in the world. This allows to redirected metallurgists attention to other means of ironmaking which are do not high-efficiency as blast furnace production but using unconventional and more inexpensive raw materials and energy sources. Smelting reduction processes, among them Romelt technology may be used for this purpose. Romelt process was developed in Russia in Moscow Institute of Steel and Alloys. It designed for hot metal production from iron-bearing materials using non-coking steam coal. Metallurgical wastes including finely dispersed ecologically dangerous dusts and sludges may use as raw materials. Blast furnace and basic oxygen furnace dust, scale, vanadium sludge, Lead-and-Zinc Works slag were processing on the pilot Romelt plant at Novolipetsky Steel Works in a period of 14 years. The mechanism of behavior of non-ferrous admixtures and the possibility of their separation in the Romelt furnace has been determined. The model of material and heat balance of Romelt process was developed. 1. INTRODUCTION The deceleration of growth rate of steel and rolling production is observed in the last few years. It is worldwide tendency, though in some countries, for example in China, production is increased. Worsening of the market conjuncture, crisis of overproduction, the fall of the prices cause the world producers to plan decrease of steel production approximately on 1 billion tonnes by 2010. Therefore, metallurgist attention may be focussed on new ways of metals production, which using unconventional cheaper sources of raw material and energy. Firstly it concerns the primary production: pig-iron. Such way of development will allow to solve some problems. First, industrial wastes may be used as raw material. The content of valuable components in wastes often exceeds their contents in raw material. However, their composition, different from that of usual raw materials, their being finely dispersed, and high moisture content present difficulties under processing. Secondly, the ecological task associated with stored waste’s destruction or converted into safe compact state may be solved. Thirdly, the completely new ways of metal production are developed. Perhaps they will be not economically effective, as in existence, but are perspective. Just now, when there is no necessity for increase of ironmaking, and on the contrary, blast furnaces the existing capacities are deduced from operation, there are reserves for development of new processes. Most of iron in wastes is in the form of oxides. Therefore, it is possible to process wastes only under reduction conditions, for example, in blast furnaces. To do this, finely dispersed wastes should be pre-pelletized. Besides, volatile non-ferrous metals have a negative effect on the process in a blast furnace. They circulate in a shaft and increase considerably the coke rate. Besides, these admixtures condense progressively on the walls of the furnace and destroy the refractory lining. That is why processes, which do not use shaft furnace, are actively developing nowadays. Absence of the burden column that condenses sublimates and creates condi" @default.
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• W2564496412 date "2002-01-01" @default.
• W2564496412 modified "2023-09-27" @default.
• W2564496412 title "ROMELT PROCESS - PROMISING TECHNOLOGY FOR IRONMAKING" @default.
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