Advantages and methods for the real-time detection of hydrocyclone operating problems

CIM Journal, Vol. 2, No. 3, 2011
C. Bazin, M. Renaud, A. Faucher and M. Mai Manga
Abstract Grinding circuits are operated in the presence of disturbances resulting from ore changes and equipment malfunctions, such as hydrocyclone overloading, worn or partly plugged apexes, surging, and internal liner detachment that may cause a loss of classification performance. Metal recovery losses in downstream leaching or flotation circuits justify the development of methods for rapid detection of hydrocyclone malfunction. Two methods are presented in this paper. The first method uses measurements from sensors available in a grinding circuit and the second uses vibration sensors installed on the individual hydrocyclones of a nest.
Keywords: Hydrocyclone, Malfunction, Vibration analysis, Simulation, Diagnosis
Full Access to Journal
PDF version for $20.00
Other papers in CIM Journal, Vol. 2, No. 3, 2011
Search
Sort By:  Relevance
Showing results 1 - 6
Text
Publication: CIM Journal
Issue: 3
Volume: 2
Year: 2011
Text
Summary: A prototype test dipper (at 1/20th volume and a geometric operating scale of 2.85) was compared during field trials against a conventional dipper with the same tare weight using the same test shovel. Both dippers followed similar dig trajectories, invoked by the shovel operator. A Microsoft® Visual Basic-embedded spreadsheet was used to interpret qualitative visual and quantitative numerical loading data collected on the hoist and crowd dig response. Overall the concept dipper, even with a...
Publication: CIM Journal
Author(s): T. G. Joseph, N. Shi
Keywords: Dippers, Curved, Scale, Modelling, Field tests
Issue: 3
Volume: 2
Year: 2011
Text
Summary: An interactive cable shovel simulation has been developed to mimic any shovel dipper geometry for a given cable shovel operating in any homogeneous face material. This interactive cable allows the user to predict shovel performance in any face material encountered and track both its ground stability and the dipper-ground interaction. An embedded Microsoft® Visual Basic spreadsheet was used as the platform for developing an interactive simulation that allows for maximum user-defined parameter...
Publication: CIM Journal
Author(s): T. G. Joseph, N. Shi
Keywords: Cable shovel, Dippers, Ground, Interactions, Simulation
Issue: 3
Volume: 2
Year: 2011
Text
Summary: When exposed to microwaves, rocks containing sulphides adsorb energy preferentially over barren gangue and quickly become warmer with minimal energy consumption. This effect makes subsequent machine sorting of ore from waste rocks or overburden possible using infrared sensing. This paper reports on the 2450 MHz microwave response of a variety of sulphide minerals by mesh size and spatial distribution, as they might occur in ore rocks. The implications for infrared ore sorting are discussed.
Publication: CIM Journal
Author(s): G. Van Weert, P. Kondos, O. Wang
Keywords: Microwave heating, Sulphide minerals, Size fractions, Infrared sensing, Ore sorting
Issue: 3
Volume: 2
Year: 2011
Text
Summary: This paper proposes new methodology to define the pit limits that yield
the maximum net present value (NPV) for a deposit, under a given economic
scenario and for a given discount rate. The method uses an algorithm that
combines dynamic programming and heuristics. It was tested for evaluating
deposits with different sizes and various grade distributions. For the discount
rate of zero, the results confirm that the economic pit limits are the same as
that defined using Lerchs Grossman...
Publication: CIM Journal
Author(s): T. S. Golosinski Pontificial Catholic University of Chile, Santiago, Chile
Keywords: Long range mine planning, Pit limit optimization, Ultimate pit limit, Economic pit limit, Nested pits
Issue: 3
Volume: 2
Year: 2011
Text
Summary: In a nickel smelting process, large amounts of off-gas emissions are generated, which can cause serious environmental and plant hygiene problems if not properly treated. With increasingly stringent environmental regulations, an enhanced understanding of well-controlled, off-gas cleaning systems is vital. In this paper, dynamic models for an industrial smelter, off-gas system tackling hazardous sulphur dioxide, carbon monoxide, and carbon dioxide are developed using mass continuity, momentum,...
Publication: CIM Journal
Author(s): H. Shang, P. Nelson, B. Salt, J. A. Scott
Keywords: Modelling, Smelter off-gas systems, SO2 emission
Issue: 3
Volume: 2
Year: 2011
Powered by Coveo Enterprise Search