Key Learning Objectives
- Identify the slurry system operating window that allows increased plant throughput while optimising spend
- A ‘decision tree’ approach to source data necessary for designing and optimising slurry systems
- What constitutes a slurry? – slurry physical and chemical properties
- Measure slurry flow properties and meaningfully interpret/use the data
- Understand the interconnection between flow properties and physical/chemical factors on pipeline transport and dewatering
- Critical information for selection of valves, pumps and fittings
- Factors influencing materials selection and wear for critical equipment and pipelines
- Dewatering fundamentals, equipment and reagent selection
- Thickener control for optimal slurry properties
About the Course
Integral to process plant design is identification of the slurry system operating window that allows increased throughput while decreasing capital and operating costs.
Understanding rheology or fluid flow, dewatering including thickening and filtration and the surface chemistry/rheology interrelationship is prerequisite to slurry system design, operation and risk management.
Although the situation has improved over recent years, investment into understanding slurry fundamentals is still often insufficient to mitigate against the risk of under or over design and poor operating performance.
The course will focus on identifying what information is required, how to interpret measured data and how to apply to new system design and existing operations.
You will learn about slurry physical and chemical properties, how flow properties or rheology are measured and how to meaningfully interpret rheograms for viscosity, yield stress and time dependence information.
The course will outline how to apply rheology and surface chemistry for pipeline transport and thickening equipment selection and optimal control and operation.
Who Will Benefit
- Managers and decision makers in mining and industrial areas
- Operational, environmental, tailings and maintenance engineers
- Plant designers, equipment and reagent suppliers
What is a slurry – the liquid to solid continuum
How do we define a slurry:
- Solids concentration
- Particle size distribution (PSD)
- Particle morphology (shape)
- Mineralogy/surface chemistry
Slurry rheology/flow properties
- Explanation of the following flow properties and an overview of what they mean in the ‘real’ world:
- Yield stress
- Shear rate dependence
- Time dependence
- The effect of solids concentration, PSD, morphology on the flow characteristics of slurries
Slurry rheology measurement
- Using an existing pipeline to measure rheology
- Capillary rheometers
- Rotational rheometers
- Determination of the yield stress from slump tests
- Data extrapolation
- Reading rheograms
Activity 1: Yield stress testing using the vane and slump
Activity 2: Flow curve measurement, viscosity calculation and fitting flow models
Flow models – communicating data
- Types of flow models
- How to use flow models
- Slurry rheology measurement problems and pitfalls – examples and case studies
Slurry rheology roadmap
A systematic ‘decision tree’ approach for a testwork program to obtain data necessary for slurry system design and optimisation.
Slurry surface chemistry/rheology relationships
- Zeta potential, ionic strength and clay chemistry explained
- Modifying rheology using surface chemistry effects
Activity 3: Demonstration – Using surface chemistry principles to modify slurry rheology
Non-Newtonian pipeline flow
- Laminar flow equations
- Reynolds numbers
- Critical deposition velocity
- Turbulent flow prediction
- Types of flow – stationary bed, rolling bed, moving bed, suspended flow, homogeneous flow
- Determination of optimum pumping conditions
Pumps, valves and fittings
- Types of pumps, valves and fittings
- Selection criteria
- Factors governing wear
- Controlling wear, inc. materials
- Compression rheology
Activity 4: Flocculant screening demonstration
- Thickener types and selection criteria
- Control of the thickener for optimal rheology
- Filter types and selection criteria
- Filtration control
On-site & in-house training
Deliver this course how you want, where you want, when you want – and save up to 40%! 8+ employees seeking training on the same topic?
Talk to us about an on-site/in-house & customised solution.