Use of silicomanganese slag and ladle electric steelmaking slag in manufacturing the welding fluxes for surfacing the mining equipment

Abstract

The possibility of manufacturing a welding flux based on silicomanganese slag and ladle electric steelmaking slag is discussed. Silicomanganese slag and ladle electric steelmaking slag were used in the experiments. Flux additive was introduced in a ratio of 5, 10, 20, 30, 50% to the silicomanganese slag. The possibility in principal of using technogenic wastes of metallurgical production is shown: slag from silicomanganese production and flux additives based on ladle electric steelmaking slag as surfacing flux. It is determined that in connection with the low concentration of iron oxide and increased basicity, it is possible to use this material for alloyed metal deposition. The analysis of the contamination level with nonmetallic inclusions and an increase in the sulfur content in the welded metal showed that without quality deterioration it is possible to introduce a flux-additive based on the ladle slag of steelmaking production in the amount not exceeding 20%. Increase in the flux additive in the amount not more than 20% worsens the welding quality, the number of non-metallic inclusions increases, as well as the sulfur content. When increasing the amount of the flux additive over 30%, the appearance of the welded layer deteriorates.