The invention provides a method, a device and a
system for controlling furnace conditions of convertor
steelmaking. By the method, the device and the
system, the problem that a
control effect is influenced by the descending of a convertor
smoke hood and accumulated
slag at a furnace mouth and the problem of
poor control accuracy in the prior art are solved. The method comprises the following steps of: acquiring the content of CO and CO2 in furnace gas ingredients, and recording the
oxygen blowing amount of a convertor and charging quantity; calculating
slag oxygen potential according to the content of the CO and the CO2, the
oxygen blowing amount of the convertor and charging information; inquiring the permission range of the
slag oxygen potential from a data
relational graph of the slag
oxygen potential and the total oxygen blowing amount according to the oxygen blowing amount of the convertor, comparing the permission range of the slag
oxygen potential with the calculated slag oxygen potential, and outputting spattering forecast information or
drying return forecast information according to a comparison result; and controlling the oxygen blowing operation according to the forecast information. Due to the adoption of the technical scheme, the defect of poor stability of control by artificial experience is overcome; and compared with the conventional
sonar slag-reducing method, the method has the advantages that: the
control effect is not influenced by the descending of the convertor
smoke hood and the accumulated slag at the furnace mouth; the control is more accurate; and the stability of the
smelting process is improved.