Use of temperature measurements for indirect measurement of process variables in milling systems

Patent metadata

Field	Value
Publication number	US-9486809-B2
Application number	US-201113990670-A
Country	US
Kind code	B2
Filing date	Oct 4, 2011
Priority date	Nov 30, 2010
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

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.

First claim

What is claimed is:

1. A method for grinding a coarse-ground material with a mill, the method comprising:
providing a continuous input mass flow to the mill including at least the coarse-ground material and a fluid;
grinding the coarse-ground material in the mill into fractured material of a desired size;
estimating a mass flow of the fractured material exiting the mill based at least on an amount of fluid exiting the mill;
using a process model based on power balance equati…

Assignees

• Held Harald
• Metzger Michael
• Steinke Florian
• Siemens Ag

Inventors

• Held Harald
• Metzger Michael
• Steinke Florian

Classifications

• B02C25/00 Primary

  Operations & Transport · mapped topic

• G05B13/041

  Physics · mapped topic