Loesche GmbH | Date: 2014-09-01
The invention relates to a method for processing steel slag to produce a hydraulic mineral binder with a high hardening potential and to recover iron. There is provision for this purpose to provide a feed product comprising steel slag with MnO. This feed product is further processed as a melt by introducing reducing agents into the melt. A lime saturation factor of between 90 and 110 is hereby to be achieved in the mineral melt portion. Subsequently the melt is cooled in a defined manner and elemental iron is mechanically separated from the solidified melt. The solidified melt is then supplied for use as hydraulic mineral binder.
Loesche GmbH | Date: 2012-06-05
The invention relates to a method for operating a multi-gas burner having at least one burner lance with a first, second and third nozzle and having a first, second and a third feed chamber. It is provided according to the invention that for high-calorific operation air is fed via the first nozzle, O_(2)-depleted gas via the second nozzle and the high-calorific combustion gas via the third nozzle into the combustion chamber, where they are combusted. Furthermore the invention relates to a multi-gas burner for operation with a low-calorific and a high-calorific combustion gas.
Loesche GmbH | Date: 2013-03-26
A vertical mill for grinding material to be ground and a method for this are claimed, wherein the vertical mill has a grinding table and one or more grinding rollers. A ring duct with blade ring for a transport gas flow ascending around the grinding table is provided. An annular gap distance is present between a downwardly projecting oversize material cone and the upper region of the grinding rollers, through which annular gap distance a proportion of fine particles is also fed back in a recirculating manner to the grinding table. In order to overcome this disadvantage, a barrier gas flow flowing from inside to outwards is provided in the region of the gap distance, whereby the recirculation of grinding particles of a certain size can be prevented.
Loesche GmbH | Date: 2013-04-19
The invention relates to a central burner for multi-fuel multiple lance burner systems having a central lance with an inner pipe and an outer pipe. The inner pipe and the outer pipe form an annular clearance duct. A plurality of outer lances are arranged around the central lance. A funnel-like mixing device is provided in the extension of the annular clearance duct in the region of the end of the inner pipe. This funnel-like mixing device has openings in its wall for combustion media to flow through. The outer lances each have a nozzle which has openings along the lateral circumferential area, said openings being arranged asymmetrically.
Loesche GmbH | Date: 2013-05-24
A method for classifying a ground material-fluid mixture and a mill classifier. In order to improve the grinding and classification process, the subsequent dust separation and in particular to optimise the energy situation of a grinding plant, it is provided according to the invention that the fine material-fluid flow leaving the dynamic classifier part with angular momentum, besides a swirl reduction or swirl elimination, with the aid of a guiding apparatus and a displacement body, is made uniform in a classifier outlet housing and deflected into a virtually linear flow. The fixed guiding apparatus arranged coaxially with the classifier axis in the classifier outlet housing and the displacement body can be formed as one unit and the guide elements of the guiding apparatus can be arranged on the displacement body and extending into the vicinity of the inner wall of the classifier outlet housing.
Loesche GmbH | Date: 2011-08-23
The invention relates to a method and an installation for coal grinding in inert operation or in non-inert operation, wherein a proportion of the coal dust produced in a mill is fed to a classifier for separation of super fines. The super fines are fed to a hot gas generator with solid fuel burner in order to heat the re-circulated process gas and to feed it back to the mill. The self-produced coal dust is thus used for the hot gas generation.
Loesche GmbH | Date: 2011-03-21
The invention relates to a method for comminution of mill feed, in particular for the cement industry, wherein the grinding material is subjected in a mill, in particular an air swept roller mill, to a grinding-drying with supply of a hot gas, is classified and fed as a dust-gas mixture to a filter for dust separation. In order to improve the energy balance and to save heat energy which is generated using a hot gas generator it is provided that fresh gas or fresh air, which is admixed for removal of the moisture of the grinding material in a predefinable portion to the recirculated hot gas or process gas, is preheated before admixing. The preheating of the fresh gas takes place in a heat exchanger through transfer of the heat energy of the process gas to be removed which is then discharged at a lower temperature to the environment. The preheated fresh gas is fed to the grinding circuit and admixed to the recirculation gas at the required points, for example as combustion air or via fresh air dampers, before or in the mill.
Loesche GmbH | Date: 2012-09-06
The invention relates to a method for processing steel slag to produce a hydraulic mineral binder with a high hardening potential and to recover iron. There is provision for this purpose to provide a feed product comprising steel slag with MnO. This feed product is further processed as a melt by introducing reducing agent into the melt. A lime saturation factor of between 90 and 110 is hereby to be achieved in the mineral melt portion. Subsequently the melt is cooled in a defined manner and elementary iron is mechanically separated from the solidified melt. The solidified melt is then supplied for use as hydraulic mineral binder. Furthermore the invention relates to a hydraulic mineral binder.
Loesche GmbH | Date: 2014-10-31
The invention relates to a grinding roller having an inclined, fixed inner roller axle (3), a roller jacket (6) being provided on a roller base body (7). The rotatable roller base body (7) is mounted relatively to the fixed inner roller axle (3) by means of an arranged fixed bearing (11) and a floating bearing (12) which is spaced apart therefrom. The floating bearing (12) is provided in the region of the end face of the roller axle (3) and for supporting the roller base body (7) having the roller jacket (6) so as to allow their rotation, and the fixed bearing (11) is arranged on the roller axle (3) in an outwardly offset manner in the direction of the swing lever (14).
Loesche GmbH | Date: 2012-03-15
The invention relates to a roller mill, in particular a coal mill, with a feed system, which comprises an integrated screw feeder. The screw feeder is arranged virtually horizontally in the region of a grit cone and comprises a screw shaft guided through the roller mill and the longitudinal axis thereof, which screw shaft is arranged on both sides respectively outside of the roller mill and at one end with a drive means and at the other end in a bearing outside of the roller mill. The feed material is fed with the screw conveyer outside of the roller mill and forcibly conveyed therein to a tray side rejection opening above a cone opening of the grit cone and drops together with the coarse grain rejected in the classifier centrally onto the grinding pan. An even distribution of the feed material and improved smooth running of the roller mill and energy saving are achieved and also soiling of the screw shaft is avoided.