engleski

Determining the ratio of the metal components of the charge at the cupola furnace

The most important equipment in a foundry is the melting furnace. Various types of furnaces have been used for cast iron melting. In cases of melt preparation for the production at high capacities, the primary melting methods used in iron casting plants are cupola furnace or electric melt furnaces. The main advantages of cupola furnaces compared to electric ones are: simple and economical device, less harmful to the environment, less sensitive to low quality charge materials and contaminants, oxidation and reduction reactions take place within and above the melt zone during cupola melting, which allows the use of highly oxidized and low quality scrap material, lower prices of alloys and non-metallic additions. One of the basic technological problems in the work of the cupola furnace is to determine the relationships between the charge components consisting of coke, flux, and metal charge in order to obtain a melt of a given chemical composition. In practice, the mass ratio of metal charge and coke is in certain mass relations as well as the total mass of flux in relation to the mass of coke. It turns out that the main problem is to determine the components of the metal part of the charge, which usually consists of waste of own production, steel scrap, purchased gray cast iron, nodular cast iron, silicon manganese, ferrosilicon, etc. In this paper, using the method of selection from the available range, the proportions of metal components of the metal part of the charge were calculated to produce a gray cast iron melt standardized with the code EN-GJL- 250.

cupola furnace, charge, metal, components

nije evidentirano