METHOD FOR DETERMINATION OF POSITION OF PLASTIC ZONE IN BALST FURNACE

摘要

The invention relates to the ferrous metallurgy. A method for determination of position of plastic zone in blast furnace comprises the measurement of consumptions of gas stream pressure on furnace height, determination of plastic zone height on location of point kink of curve of pressure consumptions, continuous measurement of distances from technological zero to loading surface of charge materials in points on radius of throat, calculation of rate of charge lowering after discharging of each portions of charge materials, which are formed loading cycle, determination of of rates in this points of radius atloading cycle, theirs average values on radius of throat, which are measured, installation of temporal intervals between maximumof rate tin points in the ration to theirs average value at period not less 8 hours of operation furnace, averaging for their intervals of rate of charge lowering Vand determination of distances from technological zero Hto level starting formation of liquid phases inof charge materials by means of the following:H= Y V· t,where, in addition to said above, Y starting level of charge materials loading (before discharge of next portion of charge), m. Technical result, which is obtained at use of the invention, consists in provision of efficiency of determination of basic structural element position of charge materialsin blast furnace plastic zone, and also possibility of increase of furnace efficiency with decrease of coke consumption on melting of cast iron due towell-groundedchoice of control actions, directed on formation of optimum form of plastic zone in furnace.