Diamond recovery process presentation

1. Industrial Attachment
Presentation (July 2022)
BY: MBAKO KUTLO MOTSHWARI

2. ROAD MAP
• Introduction
• Flow of material
• Challenges
• Envisaged solutions
• Suggestions
• Project
• Conclusion

3. INTRODUCTION
• Demonstration understanding of material flow in the
process plant.
• Identification problems and their solutions in the
process plant.
• Knowledge of parameters relative to each section of
the process plant.
• Project thesis discussion
INTRODUCTION

4. FLOW OF MATERIAL ( PRIMARY
CRUSHING)

5. MILL SECTION FLOW OF MATERIAL

6. MAIN XRT PLANT

7. DMS FLOWSHEET
recovered water
Densifier (x2)
DMS cyclones (x2)
magnetic separator (x2 drums)
Recovery Section
static screen
float screen tailings conveyor
sink screen
DMS feed bin
recovered FeSi
feed prep screen
feeder
DMS feed conveyor feed box
cyclone feed pump
DM pump
CM pump
effluent Densifier feed pump
tank
CM & densifier DM

8. THICKENING FLOWSHEET
Mill Screen---
Degrit tank
MDR
Recovery
New Audit
mill degrit cyclone (x2)
DMS degrit cyclone Tailings thickener slimes dams
Degrit screen
oversize drops into the tailings conveyor
underflow pump (x2)
Degrit tank slimes tank
slimes pump
Degrit pump
DMS feed prep
screen…effluent tank

9. DMS & RECOVERY FLOWSHEET

10. • Global Industry Standard on Tailings
Management
– Developed by the UN to promote Zero harm to
People and environment
• Fines Residue Disposal
– -300 um tailings to dams
• Coarse Residue Disposal
– 300 um – 20mm tailings
SLIMES TAILINGS AND DAMS

11. • Structures are very much corroded especially in the
DMS Section.
• Hard water in the Raw water tank
• Degrit Effluent Pump keeps on tripping leading to
overfilled thickener bound walls.
• Frequent Screen Blinding
CHALLENGES FACED IN THE PLANT

12. • Impressed Current Cathodic Protection and Sacrificial
Anode Protection.
• Desalination Plant
• The spillage pump under the thickener must collect
spillage and send it directly to the thickener
• Self cleaning/Self deblinding screens
ENVISAGED SOLUTIONS

13. • Lucara should engage corrosion engineers
(metallurgists) who will be responsible for ensuring
all machinery and structures have little or no
corrosion.
• Lucara should invest more in its laboratory and its
staff, to improve sample testing and research on the
ore and the reagents/Media used so it is accounted
for. (Qualitative analysis)
• Undergraduate Programmes For BIUST students
SUGGESTIONS

14. • Geometallurgical Model of Karowe Diamond
Mine
PROJECT

15. • Mineralogy, grade, texture have a direct
impact on metallurgical performance of ore
feed.
WHY GEOMETALLURGY

16. • Geometallurgy brings together tasks of geologists
and mineral processing engineers to do short and
medium production planning.
• integrating geology, mineralogy, mineral processing
and metallurgy to build a spatially-based model for
production management that accurately predicts:
– quality of concentrates and tailings
– metallurgical performance, like metallurgical
recoveries and throughput
GEOMETALLURGY

17. The ultimate question that a geometallurgical
programme will to be able to answer is: “how
will block X perform when it is processed?”
OBJECTIVE OF THE GEOMET MODEL

18. • Geometallurgy aims to create a predictive model for a mine-
to-valuable production chain through the combination of
geological, processing and economic models
GEOMETALLURGICAL TESTING
FRAMEWORK

19. GEOLOGICAL MODULE

20. • Unit process models provide:
– elemental grades
– mineral grades
– particle size distribution (PSD)
– mineral liberation information
– time spent on processing the block
– processing costs
– consumables quantities required for processing the block
• These can be done using HSC Sim 7.1 process simulator by
Outotec
MINERAL PROCESSING MODULE

21. ECONOMIC MODULE
• The economic module uses the information from the
geological, mining and processing models and offers
bookkeeping
• The economic module can be used to forecast
performance based on a selected scenario

22. • Plant Shifts and laboratory work have been key for
learning the following:
– The process
– Troubleshooting
– Teamwork
– Safety and good conduct in mining.
CONCLUSION

23. THANK YOU FOR YOUR
ATTENTION!