A method for continuous aeraulic separation of particulate materials consisting of a mixture of particles that is heterogeneous in both particle size and density is provided. The method includes grinding particles of materials, generating a gas stream conveying the ground particles, first aeraulic separation on the gas stream in order to separate the particles it contains into a first fraction consisting of the coarsest particles with variable densities and a second fraction consisting of the finest particles. A second aeraulic separation is performed on the first fraction in order to separate the particles that it contains into a third fraction consisting of the coarsest and/or most dense particles and a fourth fraction consisting of the least coarse and/or the least dense particles. A re-injecting of the third fraction or the fourth fraction at the inlet of the grinding is performed while simultaneous recovery of the second fraction as well as the fourth fraction or the third fraction, respectively, as output products.

A method for continuous aeraulic separation of particulate materials consisting of a mixture of particles that is heterogeneous in both particle size and density is provided. The method includes grinding particles of materials, generating a gas stream conveying the ground particles, first aeraulic separation on the gas stream in order to separate the particles it contains into a first fraction consisting of the coarsest particles with variable densities and a second fraction consisting of the finest particles. A second aeraulic separation is performed on the first fraction in order to separate the particles that it contains into a third fraction consisting of the coarsest and/or most dense particles and a fourth fraction consisting of the least coarse and/or the least dense particles. A re-injecting of the third fraction or the fourth fraction at the inlet of the grinding is performed while simultaneous recovery of the second fraction as well as the fourth fraction or the third fraction, respectively, as output products.

The present disclosure provides apparatuses and methods related to a high pressure processing device that is configured to simplify batch processing. In an embodiment, a high pressure processing device includes a processing module configured to reduce a particle size of a material or achieve a desired liquid processing result for the material, a pump configured to pump the material to an inlet of the processing module, a recirculation pathway configured to recirculate the material from an outlet of the processing module back to the pump, an input device configured to receive at least one user input variable, and a controller configured to (i) determine a number of pump strokes for the pump based on the user input variable, and (ii) control the pump according to the determined number of pump strokes so that the material makes a plurality of passes through the processing module.

The present disclosure provides apparatuses and methods related to a high pressure processing device that is configured to simplify batch processing. In an embodiment, a high pressure processing device includes a processing module configured to reduce a particle size of a material or achieve a desired liquid processing result for the material, a pump configured to pump the material to an inlet of the processing module, a recirculation pathway configured to recirculate the material from an outlet of the processing module back to the pump, an input device configured to receive at least one user input variable, and a controller configured to (i) determine a number of pump strokes for the pump based on the user input variable, and (ii) control the pump according to the determined number of pump strokes so that the material makes a plurality of passes through the processing module.

A method for fragmenting and/or weakening pourable material with high-voltage discharges includes guiding an annular or arcuate material flow past a high-voltage electrode assembly while immersed in a process liquid, by means of which high-voltage electrode assembly high-voltage punctures through the material flow are produced in that high-voltage pulses are applied to the high-voltage electrodes of the high-voltage electrode assembly by means of a high-voltage generator. Material is fed to the flow upstream of the high-voltage electrode assembly, and material is led away from the flow downstream of the high-voltage electrode assembly. This enables a continuous process, in which the speed of the material and the intensity of the high-voltage punctures can be set in wide ranges, and any insufficiently processed material can be fed back to the process zone over a short distance and practically without additional space requirement.

A method for fragmenting and/or weakening pourable material with high-voltage discharges includes guiding an annular or arcuate material flow past a high-voltage electrode assembly while immersed in a process liquid, by means of which high-voltage electrode assembly high-voltage punctures through the material flow are produced in that high-voltage pulses are applied to the high-voltage electrodes of the high-voltage electrode assembly by means of a high-voltage generator. Material is fed to the flow upstream of the high-voltage electrode assembly, and material is led away from the flow downstream of the high-voltage electrode assembly. This enables a continuous process, in which the speed of the material and the intensity of the high-voltage punctures can be set in wide ranges, and any insufficiently processed material can be fed back to the process zone over a short distance and practically without additional space requirement.

A system is disclosed. The system includes an impact processor comprising an inlet and an outlet, a secondary classifier comprising an inlet and an outlet, the secondary classifier being downstream of and coupled to the impact processor, a recirculation mixer valve downstream of and coupled to the outlet of the secondary classifier, and a recirculation line coupling the outlet of the first secondary classifier to the inlet of the impact processor.

The present invention provides a method and system for manufacturing cement wherein ground particles of cement and calcium sulfate are subjected to infrared sensors, laser sensors, or both, so that emanated, irradiated, transmitted, and/or absorbed energy having wavelengths principally within the range of 700 nanometers to 1 millimeter can be monitored and compared to stored data previously obtained from ground cement and sulfate particles and preferably correlated with stored strength, calorimetric, or other data values, such that adjustments can be made to the mill processing conditions, such as the form or amounts of calcium sulfate (e.g., gypsum, plaster, anhydride), or cement additive levels. The strength and other properties of cement can be thus adjusted, and its quality can be more uniform.

The present disclosure provides apparatuses and methods related to a high pressure processing device that is configured to simplify batch processing. In an embodiment, a high pressure processing device includes a processing module configured to reduce a particle size of a material or achieve a desired liquid processing result for the material, a pump configured to pump the material to an inlet of the processing module, a recirculation pathway configured to recirculate the material from an outlet of the processing module back to the pump, an input device configured to receive at least one user input variable, and a controller configured to (i) determine a number of pump strokes for the pump based on the user input variable, and (ii) control the pump according to the determined number of pump strokes so that the material makes a plurality of passes through the processing module.

Methods of grinding materials. The methods may include introducing a material and a circulating fluid to a jet mill and recycling the circulating fluid. The material may include coal. Systems of grinding materials also are provided.