Patent application number | Description | Published |
20130008985 | METHOD FOR OPERATING A MILL - The rotational speed of the drum of an ore mill may be controlled variably over time. By rotating the drum during a first time interval at high speed, especially hard or dense particles are broken up by tumbling. At the same time, the discharge characteristics of the mill are adversely affected. In a subsequent second time interval, the drum is rotated at a slower speed, and the material is discharged more effectively, whereas the tumbling movement inside the mill is not achieved. The combination of said different modes of operation within short time periods in continuous operation may improve both the comminution as a result of a tumbling motion of the material and also the discharge of the ground material. By regulating the rotational speed with different target values within short time windows, different requirements for the movement behavior of the material to be ground and for the discharge characteristics of the ground material can be simultaneously optimised. This may allow a higher throughput for the mill. | 01-10-2013 |
20130153694 | Method for Controlling a Mill System Having at Least One Mill, in Particular an Ore Mill or Cement Mill - A method is disclosed for controlling a mill system having at least one mill, e.g., an ore mill or cement mill, wherein electrical power is drawn from a power network to rotate at least one mill body for comminuting a material fed to the at least one mill body. One or more control variables of the mill system are regulated such that the power drawn from the power network corresponds to a predetermined setpoint power draw-off for the mill system. The method may provide control power in the power network for compensating for fluctuations in energy generation due to increased use of regenerative energies. The method may be used, e.g., to regulate high energy mill systems, e.g., tube mills, SAG mills, or ball mills, such that even relatively large quantities can be made available as control power in the power network. | 06-20-2013 |
20130214069 | Assembly, Operating Method and Circuit for a Mill Driven by a Ring Motor - An assembly is provided for receiving characteristic data of a mill including a rotating mill sleeve having rotor coils and a stator having stator coils, wherein oscillations of the mill sleeve are transmitted to stator coils and/or measurement coils on the stator. The assembly may include stator coil(s) configured to tap power supply induction voltages to detect oscillations of the mill sleeve, wherein the stator coil(s) and/or measurement coil(s) designed to tap induction voltages are positioned in a sector of the mill sleeve in which large oscillations are expected based on the scale of the mill sleeve. Further, a method includes determining the induction voltage induced on stator coil(s) and/or measurement coil(s) by tapping at least one stator coil power supply and/or by tapping at least one measurement coil, and deriving status variable(s) of a milling method that reflect the fill level status in the sector of the respective coil. | 08-22-2013 |
20130248626 | Use of Temperature Measurements for Indirect Measurement of Process Variables in Milling Systems - A method is disclosed for operating a mill at continuous input and output mass flows, and to the mill, wherein a process model based on power balance equations and mass balance equations is used. Characteristic process variables can be measured in a simple manner outside the mill. Characteristic process variables which are still not known can be ascertained by means of inserting the measured values into a respective power balance equation, assuming that the other process variables are in each case known or are insignificant. On this basis, the mill can be actuated in an optimum manner in order to provide a high output power. | 09-26-2013 |
20140046610 | METHOD AND DEVICE FOR DETERMINING THE POWER OUTPUT BY A PHOTOVOLTAIC INSTALLATION - A method for improving the usability of photovoltaic installations (PV installations) by taking account of shading information of adjacent PV installations for forecasting the power output by a relevant PV installation is provided. In particular, cloud movements and cloud shapes are taken into account. This improves the accuracy of the forecast. Here, it is advantageous that short-term forecasts in relation to e.g. the next 15 minutes are possible and a substitute energy source can be activated accordingly, in good time, prior to a dip in the power output by the PV installation. The invention can be used e.g. in the field of renewable energies, PV installations or smart grids. | 02-13-2014 |
20150033758 | COMBINED HEAT AND POWER PLANT AND METHOD FOR OPERATION THEREOF - Electrical and thermal energy is generated for at least one load by a combined heat and power plant, wherein the retrieved heat output is increased when a threshold value for a difference between a provided and retrieved heat output is exceeded. | 02-05-2015 |
20150145332 | Method and apparatus for regulating a voltage in a distribution system - A method for the closed-loop control of a voltage in a distribution network that supplies nodes with voltage via mains power lines. A node, which recognizes that the local voltage of the distribution network present at the node lies above or below a permissible supply voltage range, switches from slave mode to master mode and in the master mode regulates the local voltage that is present, by drawing or supplying reactive power in order to reach the permissible supply voltage range. The node then indicates this to other nodes of the distribution network that are in slave mode by modulating an indication signal pattern onto the reactive power being drawn or supplied by the node. The signal pattern has a signal parameter which is proportional to the amplitude of the reactive power that is drawn or supplied by the node. | 05-28-2015 |
20150286973 | MULTI-MODAL NETWORK AND METHOD FOR DISTRIBUTING RESOURCES IN A MULTI-MODAL NETWORK - A network with a plurality of subnetworks has at least two subnetworks each distributing different resources. The resources of each of the subnetworks are selected from fossil fuel, electrical energy, water, heat and cold. The subnetworks have a plurality of resource processing units, at least a portion of which are transforming units that couple the subnetworks together and transform the resources of one or more subnetworks into one or more other resources of one or more other subnetworks. At least a portion of the resource processing units are resource consumption units and/or resource provision units. At least one agent is assigned to each of the resource processing units and the agents are networked together in such a manner that each agent is able to communicate with other agents in the network. The resources are distributed in the network at least partially based on monetary transactions negotiated between the agents. | 10-08-2015 |