A method of operating a plant having a furnace including at least two vertical shafts connected by an overflow duct, wherein at least one burner is arranged above the overflow duct in each case such that the burner gases therefrom flow downward in burning operation of the respective shaft. A cooling gas supply is provided beneath the overflow duct in each case such that, in combination with the operation of a burner in the burner-operated shaft, the burner gas flowing downward is deflected in the direction of the overflow duct by the cooling gas ascending in the burner-operated shaft, and a supply of cooling gas is adjusted such that the temperature of the burner charge through which the burner gas flows at least in the burner-operated shaft is kept above the deacidification temperature thereof.

Embodiments of the present disclosure provide a system for treating oily solid material and a method for treating oily solid material. The system for treating oily solid material includes a thermal desorption module, a thermal desorption vapor treatment module and an incondensable gas treatment module. The thermal desorption module includes a vertical furnace body, a stirring shaft and an electromagnetic induction heating coil assembly. The electromagnetic induction heating coil assembly includes a plurality of coil units sequentially arranged at an outer side of the sidewall of the vertical furnace body along the height direction (Y). A heating power of each of the plurality of coil units is configured to be independently controlled.

Embodiments of the present disclosure provide a system for treating oily solid material and a method for treating oily solid material. The system for treating oily solid material includes a thermal desorption module, a thermal desorption vapor treatment module and an incondensable gas treatment module. The thermal desorption module includes a vertical furnace body, a stirring shaft and an electromagnetic induction heating coil assembly. The electromagnetic induction heating coil assembly includes a plurality of coil units sequentially arranged at an outer side of the sidewall of the vertical furnace body along the height direction (Y). A heating power of each of the plurality of coil units is configured to be independently controlled.

A supply heat amount estimating method for estimating an amount of heat supplied to pig iron in a blast furnace from an amount of heat supplied into the blast furnace and a rate of production of molten pig iron in the blast furnace, the supply heat amount estimating method includes: estimating a change in carried-out sensible heat by an in-furnace passing gas and a change in carried-in sensible heat supplied by a raw material preheated by the in-furnace passing gas and estimating the amount of heat supplied to the pig iron in the blast furnace in consideration of the estimated changes in the carried-out sensible heat and the carried-in sensible heat.

A raw material supply device that supplies a raw material into a flash smelting furnace and supplies first gas and second gas into the flash smelting furnace, includes: a first gas pathway that is provided in a lance and supplies the first gas into the flash smelting furnace; a raw material pathway that is provided out of the lance and supplies the raw material into the flash smelting furnace; a second gas pathway that is provided out of the raw material pathway and supplies the second gas into the flash smelting furnace; and a blade that is provided in the first gas pathway, has an inclined face with which the first gas is collided and revolves the first gas toward a lower side of the flash smelting furnace, the inclined face being inclined with respect to a flow direction of the first gas in the first gas pathway.

A raw material supply device that supplies a raw material into a flash smelting furnace and supplies first gas and second gas into the flash smelting furnace, includes: a first gas pathway that is provided in a lance and supplies the first gas into the flash smelting furnace; a raw material pathway that is provided out of the lance and supplies the raw material into the flash smelting furnace; a second gas pathway that is provided out of the raw material pathway and supplies the second gas into the flash smelting furnace; and a blade that is provided in the first gas pathway, has an inclined face with which the first gas is collided and revolves the first gas toward a lower side of the flash smelting furnace, the inclined face being inclined with respect to a flow direction of the first gas in the first gas pathway.

A hot metal temperature prediction method includes a reaction amount calculation step (S1) of calculating a reaction amount inside a blast furnace using a physical model that takes into account reactions and heat transfer phenomena inside the blast furnace, a deviation calculation step (S2) of calculating a deviation between the reaction amount calculated using the physical model and a measured reaction amount, a model parameter adjustment step (S3) of adjusting a parameter of the physical model that causes drift in a gas inside the blast furnace, so that the calculated deviation is reduced, and a hot metal temperature prediction step (S4) of predicting a future hot metal temperature using the physical model for which the parameter was adjusted.

A sintering furnace can have a housing, one or more heating elements, and a conveying assembly. Each heating element can be disposed within the housing and can subject a heating zone to a thermal shock temperature profile. A substrate with one or more precursors thereon can be moved by the conveying assembly through an inlet of the housing to the heating zone, where it is subjected to a first temperature of at least 500 C. for a first time period. The conveying assembly can then move the substrate with one or more sintered materials thereon from the heating zone and through an outlet of the housing.

A sintering furnace can have a housing, one or more heating elements, and a conveying assembly. Each heating element can be disposed within the housing and can subject a heating zone to a thermal shock temperature profile. A substrate with one or more precursors thereon can be moved by the conveying assembly through an inlet of the housing to the heating zone, where it is subjected to a first temperature of at least 500 C. for a first time period. The conveying assembly can then move the substrate with one or more sintered materials thereon from the heating zone and through an outlet of the housing.

A supply heat quantity estimating method includes: estimating a change in carried-out sensible heat by in-furnace passing gas and a change in carried-in sensible heat supplied by a raw material preheated by the in-furnace passing gas, and estimating a quantity of heat supplied to the pig iron in a blast furnace in consideration of the estimated changes in the carried-out sensible heat and carried-in sensible heat. The estimating includes: estimating the carried-out sensible heat in consideration of the quantity of heat released to an outside, and estimating the change in the carried-in sensible heat in consideration of a change in a surface height of the raw material; and estimating a quantity of heat held in a deadman coke, and estimating the quantity of heat supplied to the pig iron in the blast furnace in consideration of the estimated quantity of heat held in the deadman coke.