METHOD OF PRODUCTION OF LOW-CARBON FERROCHROME IN ELECTRIC FURNACE Russian patent published in 2015 - IPC C22C33/04 

FIELD: metallurgy.

SUBSTANCE: under method chromium concentrate is used as chromium containing material. Metal scrap is charged in the furnace, furnace is switched on, and after achievement of the specified power it is switched off, and on the made melt entire charge is loaded in form of the homogenized mixture with particles size 0.1-3.0 mm at components ratio (%): chromium concentrate: lime: ferrosilicium - (40-47):(47-43):(13-10), respectively, this mixture is melted due to thermal effect of the exothermal reaction of silicon reduction of chromium and iron by ferrosilicon silicone without electric arcs activation, then electric arcs are activated, and slug is refined using admixtures of ferrosilicon and lime.

EFFECT: invention guarantees high content of chromium in melt and its content adjustment, reduces power consumption by 2,5-3 times, reduces melting duration by 20-30 minutes, and reduces carbon and silicone content in the melt.

2 cl, 1 dwg, 1 tbl