co disposal commingling paste rock - home - knight piésold - co... · flow-through ball mill...
TRANSCRIPT
![Page 1: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/1.jpg)
Co‐DisposalComminglingPaste Rock
![Page 2: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/2.jpg)
DEFINITIONMine waste streams are typically separated according to their particle size (due to their origin in the mining process)
Conventionally disposed of separately
Co-disposal combines waste streams in any of a variety of ways
![Page 3: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/3.jpg)
CO-DISPOSAL WITH MINING PRODUCTS• Tailings: disposed as a slurry
– high porosity – water-filled voids.
• Waste Rock:– high porosity (>30%)– air-filled voids “hopefully”
Co-disposal - tailings filling at least some of the voids in the coarse waste.
![Page 4: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/4.jpg)
TYPICAL “RULE OF THUMB” POROSITIES
Conv. SlurriedTailings
Compacted/Filtered Tailings
Waste Rock
Particle SG 2.65 2.65 2.65
Dry Density (pcf) 65 – 90 90 – 110 90 – 110
Void Ratio 0.8 – 1.5 0.5 – 0.8 0.5 – 0.8
Porosity, pct 50 – 60 35 – 45 35 – 50
Porosity: ratio of volume of voids to total volume (*100%)Void ratio: ratio of volume of voids to volume of solids
The intent is to “hide” tailings within the voids of the waste rock
![Page 5: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/5.jpg)
EXAMPLE EFFECT OF C:F RATIO
0%
20%
40%
60%
80%
100%
120%
1 2 3 4 5
Per
cent
of v
oids
fille
d w
ith ta
iling
s
Coarse:Fine Ratio - X:1
![Page 6: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/6.jpg)
DEGREES OF MIXING
![Page 7: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/7.jpg)
PERFECTLY BLENDED, HOMOGENEOUS MIXTURES OF TAILINGS
AND WASTE ROCK: PASTE ROCK
![Page 8: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/8.jpg)
BLENDED, RELATIVELY HOMOGENEOUS MIXTURES OF TAILINGS
AND WASTE ROCK
• Tailings and mine waste are mixed relatively homogeneously
• Tailings essentially fill “all” the voids between waste rock particles
• Waste rock has predominantly rock-to-rock contact
![Page 9: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/9.jpg)
Blended Tailings/Waste Rock
15
Benefits/Goals:• Reduced footprint• Shear strength like waste rock• Permeability like tailings• Low oxygen diffusion rates• Greatly(?) reduced ARD potential• Improved permitting timeline• Better public acceptance• Improved closure opportunities…
![Page 10: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/10.jpg)
Governing equations for ARD
Keep the Fe from going ferric
![Page 11: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/11.jpg)
Above about 85% Saturation: Oxygen Diffusion Essentially Eliminated
Keeping the air out will keep the Fe from going ferric
![Page 12: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/12.jpg)
Proxy waste rock
![Page 13: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/13.jpg)
20
LA Abrasion Machine
![Page 14: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/14.jpg)
11 Secret Herbs and Spices
21
![Page 15: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/15.jpg)
PROCTOR TEST RESULTS
![Page 16: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/16.jpg)
Proctor in terms of solids content
![Page 17: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/17.jpg)
At least in these tests:a lower solids content is better
![Page 18: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/18.jpg)
Zero Air Voids
![Page 19: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/19.jpg)
6-inch dia.
Triaxialshear testing
![Page 20: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/20.jpg)
3:1 Blend
![Page 21: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/21.jpg)
4:1 Blend
![Page 22: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/22.jpg)
Co-disposed Tailings
29
Challenges:• Maintaining +/- proper mixing ratios• Defining proper mixing ratios• Developing design properties (hydraulic,
shear strength, etc.)• Mixing method• Placement/spreading method
![Page 23: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/23.jpg)
Co-disposed Tailings
30
Challenges:• Maintaining +/- proper mixing ratios• Defining proper mixing ratios• Developing design properties (hydraulic,
shear strength, etc.)• Mixing method• Placement/spreading method
![Page 24: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/24.jpg)
Material Mixing: Where to from Here?
31
![Page 25: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/25.jpg)
No, no, bigger, BIGGER!
![Page 26: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/26.jpg)
SECRECTS TO MIXING???
Flow-through Ball Mill
Agglomerator
•Continuous concrete mixer•PUG mill•Agglomerator
They all want very dilute slurry and small sized rock particles
![Page 27: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/27.jpg)
Material Mixing: The Concept
34
![Page 28: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/28.jpg)
Laboratory Mixing: The Concept
35“The water slide from hell”
![Page 29: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/29.jpg)
![Page 30: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/30.jpg)
![Page 31: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/31.jpg)
![Page 32: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/32.jpg)
![Page 33: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/33.jpg)
![Page 34: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/34.jpg)
![Page 35: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/35.jpg)
Blending: The Next Step?
46
![Page 36: Co Disposal Commingling Paste Rock - Home - Knight Piésold - Co... · Flow-through Ball Mill Agglomerator •Continuous concrete mixer •PUG mill •Agglomerator They all want very](https://reader031.vdocuments.us/reader031/viewer/2022030810/5b1b6f417f8b9a28258e8e95/html5/thumbnails/36.jpg)