Slurry Transport Using Centrifugal Pumps

1. Front Matter

   Pages i-x

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2. Introduction

   Pages 1-14

3. Review of Fluid and Particle Mechanics

   Pages 15-50

4. Flow of Non-Settling Slurries

   Pages 51-82

5. Principles of Particulate Slurry Flow

   Pages 83-101

6. Motion and Deposition of Settling Solids

   Pages 102-122

7. Heterogeneous Slurry Flow in Horizontal Pipes

   Pages 123-151

8. Complex Slurries

   Pages 152-171

9. Vertical and Inclined Slurry Flow

   Pages 172-189

10. Centrifugal Pumps

    Pages 190-226

11. Effect of Solids on Pump Performance

    Pages 227-248

12. Wear and Attrition

    Pages 249-285

13. Components of Slurry Systems

    Pages 286-311

14. System Design and Operability

    Pages 312-337

15. Pump Selection and Cost Considerations

    Pages 338-352

16. Practical Experience with Slurry Systems

    Pages 353-376

17. Environmental Aspects of Slurry Systems

    Pages 377-389

18. Back Matter

    Pages 390-432

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1,1 Applications of Slurry Transport Vast tonnages are pumped every year in the form of solid-liquid mixtures, known as slurries. The application which involves the largest quantities is the dredging industry, continually maintaining navigation in harbours and rivers, altering coastlines and winning material for landfill and construction purposes. As a single dredge may be required to maintain a throughput of 7000 tonnes of slurry per hour or more, very large centrifugal pumps are used. Figures 1-1 and 1-2 show, respectively, an exterior view of this type of pump, and a view of a large dredge-pump impeller (Addie & Helmley, 1989). The manufacture of fertiliser is another process involving massive slur- transport operations. Li Florida, phosphate matrix is recovered by huge draglines in open-pit mining operations. It is then slurried, and pumped to the wash plants through pipelines with a typical length of about 10 kilometres. Each year some 34 million tonnes of matrix are transported in this manner. This industry employs centrifugal pumps that are generally smaller than those used in large dredges, but impeller diameters up to 1. 4 m are common, and drive capacity is often in excess of 1000 kW. The transport distance is typically longer than for dredging applications, and Chapter 1 Figure LI. Testing a dredge pump at the GIW Hydraulic Laboratory Figure 1. 2. Impeller for large dredge pump 1. Introduction 3 hence a series of pumping stations is often used. Figure 1-3 shows a boost- pump installation in a phosphate pipeline.

• design
• environment
• mechanics
• transport
• units

• Queen’s University, Kingston, Canada

  K. C. Wilson

• GIW Industries Inc., Grovetown, USA

  G. R. Addie

• Luleå University of Technology, Luleå, Sweden

  A. Sellgren

• University of Surrey, Guildford, Surrey, UK

  R. Clift

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