Polysius Ag

Other

Elex Cemcat Ag

Polysius Corporation

Thyssenkrupp Polysius Aktiengesellschaft

Franz-Josef Zurhove

Markus Berger

Pedro Guerrero Palma

Ludwig Könning

Donald A Longhurst

Ludger Kimmeyer

Guido Scholz

Heiko Fornefeld

Bernhard Peterwerth

Helmut Krumme

Thomas Rüther

Ludger Schulte

Olaf Hagemeier

Dirk Dilly

Egbert Burchardt

Marco Völlink

Matthias Wuwer

Carsten Sachse

Benjamin Berndzen

Rüdiger Ostkamp

Thomas Spliethoff

Christian Neumann

Christian Speith

The invention relates to a process and a plant for producing cement clinker, which has a furnace system and has essentially the following process steps:&#x2014;raw material is preheated in a preheater by means of hot offgases from the furnace system,&#x2014;dust is removed from the hot offgas downstream of the preheater in a preliminary dust removal apparatus to a residual dust concentration of max. 20 g/standard m,&#x2014;the offgas which has been subjected to preliminary dust removal is purified in a selective catalytic flue gas purification plant (selective catalytic reduction, SCR),&#x2014;at least part of the offgas purified in the flue gas purification plant is conveyed in a bypass around a raw material milling plant to a cooling device and cooled there to temperatures of max. 140&#xb0; C.,&#x2014;before the residual dust in the offgas is precipitated in a process filter and&#x2014;at least part of the residual dust precipitated in the process filter is discharged for removal of mercury.

Method and installation for producing clinker

The invention relates to a process and a plant for producing cement clinker and for purifying the off-gases formed thereby, wherein

Process and plant for producing cement clinker and for purifying the offgases formed

The invention relates to a roller mill having a grinding table, at least one grinding roller and at least two drives with a rotor winding for driving the roller mill and at least one adjustment device for adjusting the motor torque of at least one drive, the adjustment device being connected to the rotor winding of at least one drive in order to influence the rotor current.

Roller mill and method for size reduction of ground material

A roller mill includes a rotatable grinding table, at least one grinding roller retained rotatably on a pivot lever and in rolling engagement with the grinding table, the pivot lever being pivotable about a pivot lever axis, and at least one drive train connected to the grinding roller and having a fixed motor and a fixed gearing mechanism. The drive train further has a gearing mechanism which pivots with the pivot lever and/or the grinding roller.

Roller with driven grinding roller

The roller mill according to the invention substantially comprises at least one grinding roller and a grinding table, the grinding table having a grinding table inner space which is open in a downward direction, at least one grinding roller drive system for driving the grinding roller and a grinding table drive system for driving the grinding table. The grinding table drive system further has a gearless direct drive which is arranged in the grinding table inner space.

Roller mill

The invention relates to a method for monitoring the load state of a grinding system having rotating grinding elements, the dynamic forces exerted by the grinding stock on the grinding elements being detected in a first frequency range which contains the fundamental oscillation of the grinding elements, and in a second frequency range in which the first harmonic of the fundamental oscillation occurs, and measures for reducing the load state being introduced when the first harmonic exceeds a predetermined threshold value in relation to the magnitude of the fundamental oscillation. Such a method permits very reliable and accurate monitoring of the load state of the grinding system.

Method for monitoring a grinding system and grinding system comprising a monitoring device

The invention relates to a method for comminuting material to be ground having a roller mill which has a mill platen, at least one mill roller and at least two drives for driving the roller mill, with there being provided a power compensation control system for the drives which controls the power of the drives at a predetermined ratio relative to each other by the speed of at least one drive being controlled.

Method for comminuting material to be ground using a roller mill

The invention relates to a roller mill having a mill housing, a mill path which is supported so as to be rotatable about a mill axis inside the mill housing, and at least one mill roller which can be rotated about a mill roller shaft and which is engaged with the mill path in terms of rolling action. There is further provided a pivot lever which is for rotatably retaining the mill roller and which has a pivot shaft arranged parallel with the mill roller axis and which is supported outside the mill housing. The pivot lever is further in operational contact with a hydropneumatic resilient system in order to adjust the pressing pressure of the mill roller. The pivot lever is supported outside the mill housing with spacing therefrom in such a manner that the forces which are produced by the hydropneumatic resilient system are dissipated into the mill foundation directly or via pillars.

A milling station and a method for grinding milling material using at least one coarse grinding circuit and at least one fine grinding circuit. The coarse grinding circuit includes a classifier and a material bed roller mill. The fine grinding circuit includes a tube mill with at least two grinding chambers, a central outlet, and a divider. In some instances, at least some of the milling material from the coarse grinding circuit is subdivided in the divider and delivered to the at least two grinding chambers of the fine grinding circuit while some of the milling material is jointly discharged from the at least two grinding chambers through the central outlet.

Milling station and method for grinding milling material

The invention relates to a roll mill having a grinding plate and at least one grinding roll rolling on the grinding plate, wherein material which is to be comminuted, after being subjected to loading in a gap formed between the grinding plate and grinding roll, is directed away over the periphery of the grinding plate and, furthermore, a stationary accumulating edge, which does not rotate along with the grinding plate, is provided, at least on that side of the grinding roll which is directed towards the periphery of the grinding plate, this accumulating edge forming at least part of an elevation of the periphery of the grinding plate. The elevation of the periphery of the grinding plate here is higher in the region of the grinding rolls than in the region between the grinding rolls, in order to prevent the material which is to be comminuted from escaping radially from the gap formed between the grinding plate and grinding roll.

A method and apparatus for grinding iron ore or iron ore concentrate is able to grind iron ore or iron ore concentrate economically. In the method and apparatus disclosed, the material is ground in circulation in a material bed roll mill, one fraction of the iron ore or iron ore concentrate ground in the material bed roll mill is recirculated to the material bed roll mill and the other fraction of the iron ore or iron ore concentrate is classified into oversize material and fines, and the oversize material is returned to the material bed roll mill.

Method and apparatus for grinding iron ore or iron ore concentrate

Apparatus for separating particulate material into relatively fine and relatively coarse particles wherein such particulate material and a gas stream are introduced independently of one another to a separating zone through which the gas stream flows at such volume and velocity as to entrain fine particles and convey them from the separating zone to grinding or other facilities and wherein the fineness of entrained particles may be adjusted by diverting a selected portion of the gas stream from the separating zone to a bypass passageway followed by recombining the diverted portion of such gas stream with the gas containing the entrained particles.

Apparatus for controlling the separation of particulate material

Apparatus and methods for separating particulate material into relatively fine and relatively coarse particles wherein such particulate material is introduced to a separating zone through which a gas stream flows at such volume and velocity as to entrain fine particles and convey them from the separating zone to grinding or other facilities and wherein the fineness of entrained particles may be adjusted by diverting a selected portion of the gas stream from the separating zone to a bypass passageway followed by recombining the diverted portion of such gas stream with the gas containing the entrained particles.

Growing community of inventors

Bad Iburg, Germany

Franz-Josef Zurhove