... ratio remains well below 1 for all bubbles > 1 mm (the bubbles are oblate). Bubble sha... more ... ratio remains well below 1 for all bubbles > 1 mm (the bubbles are oblate). Bubble shape plays a role in bubble motion ( [Wu and Gharib, 2002] and [Kracht and Finch, 2010] ) and is recorded as the average aspect ratio (AR). ...
An integral solution to the control problem has to deal with problems associated with instrumenta... more An integral solution to the control problem has to deal with problems associated with instrumentation, process modelling, control strategies and control algorithms. The term “hierarchical” control is used here to mean the intelligent integration of available knowledge, control algorithms and logic rules of decision. The selection of information, algorithms and rules is based on the experimental and theoretical knowledge of
Manual para implementación de videos de apoyoa los procesos de enseñanza aprendizaje Manual para ... more Manual para implementación de videos de apoyoa los procesos de enseñanza aprendizaje Manual para la comunicación oral efectiva.
One of the key equipments in solid-liquid separation in mineral processing plants is the thickene... more One of the key equipments in solid-liquid separation in mineral processing plants is the thickener. To improve water recovery in thickeners, it is crucial to measure and control the solids bed height and the solids concentration though commercial devices to measure these two parameters simultaneously have yet to be encountered. To address the issue, a new device was developed and evaluated at pilot scale. The device measures the axial profiles of the solids content and the mud line height in thickeners. The working principle is based on conductivity profile measurements and the Maxwell model, which allows for calculating the volumetric fraction of the dispersed phase and also compensates for liquid conductivity variations. The principle was first applied for solid-liquid dispersion in a prototype unit at McGill University, however electrode scaling and software limitations restricted its industrial application. In this work, the McGill prototype was enhanced with removable electrode...
One of the key equipments in solid-liquid separation in mineral processing plants is the thickene... more One of the key equipments in solid-liquid separation in mineral processing plants is the thickener. To improve water recovery in thickeners, it is crucial to measure and control the solids bed height and the solids concentration though commercial devices to measure these two parameters simultaneously have yet to be encountered. To address the issue, a new device was developed and evaluated at pilot scale. The device measures the axial profiles of the solids content and the mud line height in thickeners. The working principle is based on conductivity profile measurements and the Maxwell model, which allows for calculating the volumetric fraction of the dispersed phase and also compensates for liquid conductivity variations. The principle was first applied for solid-liquid dispersion in a prototype unit at McGill University, however electrode scaling and software limitations restricted its industrial application. In this work, the McGill prototype was enhanced with removable electrodes and improved electronics, allowing work in multiple configurations. The new device uses up to 24 electrodes mounted on a variable electrode configuration probe which allows for measurements in different pulp and paste solid contents. The unit is connected to an intelligent PLC (Programmable Logic Controller) and a conductivity meter, with selectable electromechanical relays and software based on a neural network, allowing: online measurements of solid concentration profile, self-diagnosis of the sensor and various conductivity cell configurations. Experimental results indicate that the sensor can detect bed level at an error of 1.6%. The new device appears as a possible alternative to monitor thickener operating parameters and thus, can be used to improve water removal from solids.
... ratio remains well below 1 for all bubbles > 1 mm (the bubbles are oblate). Bubble sha... more ... ratio remains well below 1 for all bubbles > 1 mm (the bubbles are oblate). Bubble shape plays a role in bubble motion ( [Wu and Gharib, 2002] and [Kracht and Finch, 2010] ) and is recorded as the average aspect ratio (AR). ...
An integral solution to the control problem has to deal with problems associated with instrumenta... more An integral solution to the control problem has to deal with problems associated with instrumentation, process modelling, control strategies and control algorithms. The term “hierarchical” control is used here to mean the intelligent integration of available knowledge, control algorithms and logic rules of decision. The selection of information, algorithms and rules is based on the experimental and theoretical knowledge of
Manual para implementación de videos de apoyoa los procesos de enseñanza aprendizaje Manual para ... more Manual para implementación de videos de apoyoa los procesos de enseñanza aprendizaje Manual para la comunicación oral efectiva.
One of the key equipments in solid-liquid separation in mineral processing plants is the thickene... more One of the key equipments in solid-liquid separation in mineral processing plants is the thickener. To improve water recovery in thickeners, it is crucial to measure and control the solids bed height and the solids concentration though commercial devices to measure these two parameters simultaneously have yet to be encountered. To address the issue, a new device was developed and evaluated at pilot scale. The device measures the axial profiles of the solids content and the mud line height in thickeners. The working principle is based on conductivity profile measurements and the Maxwell model, which allows for calculating the volumetric fraction of the dispersed phase and also compensates for liquid conductivity variations. The principle was first applied for solid-liquid dispersion in a prototype unit at McGill University, however electrode scaling and software limitations restricted its industrial application. In this work, the McGill prototype was enhanced with removable electrode...
One of the key equipments in solid-liquid separation in mineral processing plants is the thickene... more One of the key equipments in solid-liquid separation in mineral processing plants is the thickener. To improve water recovery in thickeners, it is crucial to measure and control the solids bed height and the solids concentration though commercial devices to measure these two parameters simultaneously have yet to be encountered. To address the issue, a new device was developed and evaluated at pilot scale. The device measures the axial profiles of the solids content and the mud line height in thickeners. The working principle is based on conductivity profile measurements and the Maxwell model, which allows for calculating the volumetric fraction of the dispersed phase and also compensates for liquid conductivity variations. The principle was first applied for solid-liquid dispersion in a prototype unit at McGill University, however electrode scaling and software limitations restricted its industrial application. In this work, the McGill prototype was enhanced with removable electrodes and improved electronics, allowing work in multiple configurations. The new device uses up to 24 electrodes mounted on a variable electrode configuration probe which allows for measurements in different pulp and paste solid contents. The unit is connected to an intelligent PLC (Programmable Logic Controller) and a conductivity meter, with selectable electromechanical relays and software based on a neural network, allowing: online measurements of solid concentration profile, self-diagnosis of the sensor and various conductivity cell configurations. Experimental results indicate that the sensor can detect bed level at an error of 1.6%. The new device appears as a possible alternative to monitor thickener operating parameters and thus, can be used to improve water removal from solids.
Uploads
Papers by Claudio Acuna Perez