Testwork: Crushing work index - Revision history

Alex Doll: Redirected page to Testwork: Bond crushing work index

2012-12-02T22:04:15Z

Redirected page to Testwork: Bond crushing work index

Alex Doll: Created page with "category:Testwork ==Testwork: Bond Crushing Work Index== {{Test|name=Bond Low-Energy Impact Crushing Work Index|Abrev=Wi_C|Alt=CWI IWI LEIT|F80=100 mm|P80=20 mm|..."

2012-12-02T05:24:03Z

Created page with "category:Testwork ==Testwork: Bond Crushing Work Index== {{Test|name=Bond Low-Energy Impact Crushing Work Index|Abrev=WiC|Alt=CWI IWI LEIT|F80=100 mm|P80=20 mm|..."

New page

[[category:Testwork]]
==Testwork: Bond Crushing Work Index==
{{Test|name=Bond Low-Energy Impact Crushing Work Index|Abrev=WiC|Alt=CWI IWI LEIT|F80=100 mm|P80=20 mm|Models=Bond models}}
The Bond low-energy impact crushing work index (more informally, the Bond crushing work index) is not as common as the [[Testwork: Bond ball mill work index|Bond ball mill work index]], and it is a notoriously noisy test.

The test is a 'per-specimen' test where individual specimens of prepared rock are hand-picked by the test operator and placed into the apparatus. Typically twenty specimens are chosen to represent a sample and the result reported is the average of those specimens.

There is a high-energy impact work index which is a different (and incompatible) test. The high-energy test has fallen into disuse and any recent (post year 2000) test labelled as a "crushing work index" can confidently be assumed to be the low-energy impact test.

===Sample Requirements===

The test requires 20 large lumps, minimum dimension 75 mm. When using drill core, use whole-diameter HQ or PQ size core.

===Test Inputs===

Not applicable.

===Test Outputs===

SAGMILLING.COM uses only metric units; if the laboratory reported work index in "short ton" units, multiply that value by 1.1023 and enter the result.

The laboratory will report the following information:
* N° specimens: The number of specimens tested (typically 20)
* min The metric work index of the sample with the lowest result
* max: The metric work index of the sample with the highest result
* stdev: The standard deviation of metric work index of all the samples
* WiC: The arithmetic average of the metric work index of all the samples
* density: The water-displacement density of the specimens prior to testing, in kg/L (also referred to as 'specific gravity')

=== Modelling ===
Crushing mill work index is used in the SAGMILLING.COM [[Model:BondModel|Bond/Barratt specific energy consumption model]].

The work index is used to calculate the energy requirement to break rocks in the coarse size range, from >100 mm down to about 10 mm - 20 mm.

← Older revision		Revision as of 22:04, 2 December 2012
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−	[[~~category:~~Testwork]]	+	#REDIRECT [[Testwork: Bond crushing work index]]
−	==Testwork: Bond Crushing Work Index==
−	{{Test\|name=Bond Low-Energy Impact Crushing Work Index\|Abrev=Wi<sub>C</sub>\|Alt=CWI IWI LEIT\|F80=100 mm\|P80=20 mm\|Models=Bond models}}
−	The Bond low-energy impact crushing work index (more informally, the Bond crushing work index) is not as common as the [[Testwork: Bond ball mill work index\|Bond ball mill work index]], and it is a notoriously noisy test.
−
−	The test is a 'per-specimen' test where individual specimens of prepared rock are hand-picked by the test operator and placed into the apparatus. Typically twenty specimens are chosen to represent a sample and the result reported is the average of those specimens.
−
−	There is a high-energy impact work index which is a different (and incompatible) test. The high-energy test has fallen into disuse and any recent (post year 2000) test labelled as a "crushing work index" can confidently be assumed to be the low-energy impact test.
−
−	===Sample Requirements===
−
−	The test requires 20 large lumps, minimum dimension 75 mm. When using drill core, use whole-diameter HQ or PQ size core.
−
−	===Test Inputs===
−
−	Not applicable.
−
−	===Test Outputs===
−
−	SAGMILLING.COM uses only metric units; if the laboratory reported work index in "short ton" units, multiply that value by 1.1023 and enter the result.
−
−	The laboratory will report the following information:
−	* <b>N° specimens:</b> The number of specimens tested (typically 20)
−	* <b>min</b> The metric work index of the sample with the lowest result
−	* <b>max:</b> The metric work index of the sample with the highest result
−	* <b>stdev:</b> The standard deviation of metric work index of all the samples
−	* <b>WiC:</b> The arithmetic average of the metric work index of all the samples
−	* <b>density:</b> The water-displacement density of the specimens prior to testing, in kg/L (also referred to as 'specific gravity')
−
−	=== Modelling ===
−	Crushing mill work index is used in the SAGMILLING.COM [[Model:BondModel\|Bond/Barratt specific energy consumption model]].
−
−	The work index is used to calculate the energy requirement to break rocks in the coarse size range, from >100 mm down to about 10 mm - 20 mm.

Testwork: Crushing work index - Revision history

Alex Doll: Redirected page to Testwork: Bond crushing work index

Alex Doll: Created page with "category:Testwork ==Testwork: Bond Crushing Work Index== {{Test|name=Bond Low-Energy Impact Crushing Work Index|Abrev=WiC|Alt=CWI IWI LEIT|F80=100 mm|P80=20 mm|..."

Alex Doll: Created page with "category:Testwork ==Testwork: Bond Crushing Work Index== {{Test|name=Bond Low-Energy Impact Crushing Work Index|Abrev=Wi_C|Alt=CWI IWI LEIT|F80=100 mm|P80=20 mm|..."