Maerz Ofenbau Ag

Thyssen Krupp Ag

Sulzer Chemtech Ag

Thyssenkrupp Polysius Gmbh

Patrick Bucher

Hannes Piringer

Dirk Schefer

Kurt Steiner

Fernand Didelon

Roger Wallimann

A shaft furnace for firing carbonate-containing material may include, in a flow direction of the material, a preheating zone, a firing zone, a cooling zone, and a material outlet for discharging the material from the shaft furnace. Burner lances project into the firing zone. At least one burner lance has a first penetration depth into the firing zone and at least one further burner lance has a second penetration depth into the firing zone that is greater than the first penetration depth. A primary air conduit may be configured to convey combustion air and may be connected to at least one burner lance. An oxygen conduit for conveying oxygen into the firing zone may be arranged such that oxygen flows from the oxygen conduit at least one burner lance having the second penetration depth.

Method and shaft furnace for burning carbon-containing material in a shaft furnace

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.

System having a furnace and method for operating such a system

A furnace may include at least two vertical shafts, each of which may have at an upper end thereof an inlet for material to be burnt and at a lower end thereof a burnt material outlet. The inlet and the outlet may be connected by a transfer channel. In each case, at least one main burner may be positioned above the transfer channel, and a cooling gas inlet may be positioned below the transfer channel. At least one additional burner may be positioned below the transfer channel in each of the shafts. Such a furnace can be operated such that the material to be burnt in the currently fired shaft is at least partially calcined in a main burning zone above the transfer channel, and then thermally aftertreated in an additional burning zone positioned between the transfer channel and the additional burner.

Furnace and method for operating a furnace

A method for burning lumpy stock is performed in at least one shaft which comprises a preheating zone, a burning zone and a cooling zone. Coal with a swelling index &#x3e;1 is supplied together with a transport medium via burner lances which have burner tips. The coal together with the transport medium emerges into the shaft, wherein the temperature of the coal in the burner lances is kept below a temperature value at which melt phases of the coal that is used are formed. Here, for the transportation of the coal, use is made of a transport medium which, in the shaft, in the region directly adjacent to the burner tip, forms an oxygen-depleted atmosphere in order to delay the ignition of the coal after it emerges from the burner lance.

Method for burning lump material

According to the invention, the method for burning fragmented material is carried out in at least one shaft which comprises a preheating zone, a combustion zone and a cooling zone, coal having a swelling index &#x3e; 1 being supplied via combustion lances, and the temperature of the coal in the combustion lances being maintained below a temperature value at which melting phases of the coal used are formed.

Method for burning pelletized good

The apparatus () which combines a heat exchange between a liquid () and a heat transporting medium () with a static mixing of the liquid includes installed structures () in a jacket (). The jacket extends longitudinally between a head end () and a base end (). The installed structures form a heat exchanging and mixing structure. The heat transporting medium can be conveyed from the base end to the head end as an inner flow in tubes () of the installed structures. The liquid can be conveyed from the head end to the base end as an outer flow. Reinforcement elements () are provided which stabilise the installed structures in the longitudinal direction against pressure gradients generated by the liquid. The installed structures are connected by the reinforcement elements to form a non-expandable part structure () in a main region; they remain at least partly non-reinforced as a longitudinally expandable part structure () and in a secondary region complementary to the main region.

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Schönenwerd, Switzerland

Patrick Bucher