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Thyssen Krupp Ag

Thyssenkrupp Industrial Solutions Ag

Thyssenkrupp Polysius Aktiengesellschaft

Dietmar Schulz

Detlev Kupper

Mark Peter Terry

Ludger Brentrup

Karl Josef Menzel

Timo Stender

Reinhard Beilmann

Björn-Olaf Assmann

Mark Terry

In the method according to the invention for operating a cement plant, the raw meal is preheated in a preheating zone, the preheated material is precalcined in a calcining zone and the precalcined material is finally sintered in a sintering zone. The cement plant is operated in such a manner that the precalcined material which is supplied to the sintering zone has an SOconcentration of at least 5.5% by mass and a CaSOproportion of at least 75%, preferably 90%, of the total salt content.

Cement system and method for operating a cement system

In the method according to the invention for separating mercury from waste gases of a cement production process, the mercury is sorbed on a sorbent, the sorbent is subsequently discharged from the process and supplied to a discharge reactor which is operated with a carrier gas. The sorbent is heated there to temperatures of more than 250&#xb0; C. so that the mercury is discharged from the sorbent and changed into the gas phase, the gas of the discharge reactor that has accumulated mercury subsequently having the dust removed from it in a preliminary dust removal device, and only a part-flow of the gas which has been enriched and had the dust removed from it in this manner being drawn off at high temperatures and cleaned in a subsequent sorption stage, whilst the remaining part-flow is brought to the temperature required for the discharge of the mercury in the discharge reactor in a heat transfer system and is again supplied as a carrier gas to the discharge reactor.

Method and system for separating mercury from waste gases of a cement production process

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Beckum, Germany

Dietmar Schulz