User talk:Alex Doll - Revision history

Alex Doll: /* Ball wear benchmarking */

2013-09-02T16:32:33Z

Ball wear benchmarking

← Older revision		Revision as of 16:32, 2 September 2013
Line 24:		Line 24:
	** t<sub>a</sub>: 0.75		** t<sub>a</sub>: 0.75
	** density: 2.52 t/m³		** density: 2.52 t/m³

			== SAG liner wear benchmarking==
			Orford, I., Larsen, C., Cooper, M., Renaud, M. & Strah, L '''Brunswick Mine SAG Liner Design & Wear''', CMP 2003

			* SAG liner wear 2.6 g/kWh
			* liners typically replaced with 50% steel remaining
			* Ai not given, but assume 0.3 for a massive sulphide
			* Bond ball mill liner wear estimate: 8.1 g/kWh
			* SAG wear is less than half the Bond BM prediction.

	== Ball wear benchmarking==		== Ball wear benchmarking==
Line 30:		Line 39:
	* Operating work index: 11.5 kWh/t		* Operating work index: 11.5 kWh/t
	* SAG operating with 4% ball charge (originally was AG)		* SAG operating with 4% ball charge (originally was AG)
	* SAG 4" ball wear rate: 0.12 kg/t		* SAG 4" ball wear rate: 0.12 kg/t (10.4 g/kWh)
	* BM 24 mm slug wear: 0.91 kg/t		* BM 24 mm slug wear: 0.91 kg/t (80 g/kWh)
			* Assume Ai of 0.3, BM ball wear rate prediction: 105 g/kWh

	The parallel RM/BM plant has same operating work index, but following wear:		The parallel RM/BM plant has same operating work index, but following wear:

Alex Doll: /* Ball wear benchmarking */

2013-06-15T19:22:04Z

Ball wear benchmarking

← Older revision		Revision as of 19:22, 15 June 2013
Line 39:		Line 39:

	Since Wi<sub>O</sub> is the same for both, the SABC ball wear is half the RM-BM combined steel wear.		Since Wi<sub>O</sub> is the same for both, the SABC ball wear is half the RM-BM combined steel wear.

			== Ball Mill Ball wear benchmarking==
			Villanueva, F., Ibañez, L., & Barratt, D. '''Los Pelambres Concentrator Operative Experience''', SAG 2001

			* BM Operating work index: 15.9 kWh/t (14.4 kWh/st)
			* Laboratory ball mill work index: 12.1 kWh/t (11.0 kWh/st)
			* T<sub>80</sub>: 2.5 - 3.0 mm (raw measurement)
			* BM specific energy consumption: 11.9 kWh/t
			* BM ball wear: 315 g/t

Alex Doll: /* Ball and liner wear benchmarking */

2013-05-29T03:13:30Z

Ball and liner wear benchmarking

← Older revision		Revision as of 03:13, 29 May 2013
Line 24:		Line 24:
	** t<sub>a</sub>: 0.75		** t<sub>a</sub>: 0.75
	** density: 2.52 t/m³		** density: 2.52 t/m³

			== Ball wear benchmarking==
			Larsen, C., Cooper, M., & Trusiak, A. '''Design and Operation of Brunswick's AG/SAG Circuit''', SAG 2001

			* Operating work index: 11.5 kWh/t
			* SAG operating with 4% ball charge (originally was AG)
			* SAG 4" ball wear rate: 0.12 kg/t
			* BM 24 mm slug wear: 0.91 kg/t

			The parallel RM/BM plant has same operating work index, but following wear:
			* Rods 0.39 kg/t
			* 38 mm balls: 0.72 kg/t
			* 25 mm slugs: 0.94 kg/t

			Since Wi<sub>O</sub> is the same for both, the SABC ball wear is half the RM-BM combined steel wear.

Alex Doll: /* Ball and liner wear benchmarking */

2013-04-11T21:07:58Z

Ball and liner wear benchmarking

← Older revision		Revision as of 21:07, 11 April 2013
Line 13:		Line 13:
	* Ball consumption: 3 kg/t (2-3.5 kg/t) or 0.16 g/kWh		* Ball consumption: 3 kg/t (2-3.5 kg/t) or 0.16 g/kWh
	* Bond predicted ball mill ball consumption: 0.13 kg/kWh; ''actual ~ predicted''		* Bond predicted ball mill ball consumption: 0.13 kg/kWh; ''actual ~ predicted''
⚫	* Grate wear: 0.06 g/kWh steel; 0.02 g/kWh rubbber
	* Bond predicted ball mill liner consumption: 9.5 g/kWh		* Bond predicted ball mill liner consumption: 9.5 g/kWh
			* Shell liners life of 6 months; assume 3" thick at end of life. 5 g/kWh wear (+ 3 g/kWh scrapped)
		⚫	* Grate wear: 0.06 g/kWh steel; 0.02 g/kWh rubbber

	* Laboratory testwork:		* Laboratory testwork:

Alex Doll: /* Ball and liner wear benchmarking */

2013-04-11T19:39:24Z

Ball and liner wear benchmarking

← Older revision		Revision as of 19:39, 11 April 2013
Line 6:		Line 6:
	Single-stage SAG mill, reported with slurry pooling		Single-stage SAG mill, reported with slurry pooling

⚫	* Bond abrasion index: 0.5 (0.467-0.555)
	* New liner effective thickness: 7.7 inches (half-worn 5.5 inches)		* New liner effective thickness: 7.7 inches (half-worn 5.5 inches)
	* Ball charge: 19% v/v (18-20%)		* Ball charge: 19% v/v (18-20%)
Line 14:		Line 13:
	* Ball consumption: 3 kg/t (2-3.5 kg/t) or 0.16 g/kWh		* Ball consumption: 3 kg/t (2-3.5 kg/t) or 0.16 g/kWh
	* Bond predicted ball mill ball consumption: 0.13 kg/kWh; ''actual ~ predicted''		* Bond predicted ball mill ball consumption: 0.13 kg/kWh; ''actual ~ predicted''
			* Grate wear: 0.06 g/kWh steel; 0.02 g/kWh rubbber
			* Bond predicted ball mill liner consumption: 9.5 g/kWh

	* Laboratory testwork:		* Laboratory testwork:
		⚫	** Bond abrasion index: 0.5 (0.467-0.555)
	** DWi 3.45 kWh/m³		** DWi 3.45 kWh/m³
	** Mia 12.3		** Mia 12.3

Alex Doll: Created page with "Not sure what to do with this benchmarking data yet, but I'll record it here so I can find it in the future ==Ball and liner wear benchmarking== ''Ben Burger, Luis Vargas, Ha..."

2013-04-11T19:19:16Z

Created page with "Not sure what to do with this benchmarking data yet, but I'll record it here so I can find it in the future ==Ball and liner wear benchmarking== ''Ben Burger, Luis Vargas, Ha..."

New page

Not sure what to do with this benchmarking data yet, but I'll record it here so I can find it in the future

==Ball and liner wear benchmarking==
''Ben Burger, Luis Vargas, Hamer Arevalo, Sergio Vicuna, Jim Seidel, Walter Valery, Alex Jankovic, Roberto Valle and Eduardo Nozawa'', '''YANACOCHA GOLD SINGLE STAGE SAG MILL DESIGN, OPERATION, AND OPTIMIZATION''', SAG 2011

Single-stage SAG mill, reported with slurry pooling

* Bond abrasion index: 0.5 (0.467-0.555)
* New liner effective thickness: 7.7 inches (half-worn 5.5 inches)
* Ball charge: 19% v/v (18-20%)
* total charge: 22.5% v/v (20%-25%)
* grate open area 12%; wear rate 0.6 mm/day (rubber)
* Operating work index 23.0 - 25.2 metric
* Ball consumption: 3 kg/t (2-3.5 kg/t) or 0.16 g/kWh
* Bond predicted ball mill ball consumption: 0.13 kg/kWh; ''actual ~ predicted''
* Laboratory testwork:
** DWi 3.45 kWh/m³
** Mia 12.3
** A: 82.8; b: 0.88; A×b: 72.9
** t<sub>a</sub>: 0.75
** density: 2.52 t/m³