Crushing Ratio Calculator

Audit actual JawCrusher matched D80 reduction against independent nominal trial ratios, not Bond net energy or two streams assumed additive. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.

Description

A size-reduction ratio compares matched feed and product D80 measurements for jaw crushing.

A size-reduction ratio compares matched feed and product D80 measurements for jaw crushing.^[1]

A nominal trial ratio provides a separate signed comparison.

When to use Crushing Ratio Calculator

Use this tool to calculate or review the supplied observations under the stated rules. Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.

How to use Crushing Ratio Calculator and understand its results

Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
Enter observedJawCrusherFeedD80Mm, observedJawCrusherProductD80Mm, callerMatchedJawCrusherNominalRatios, using the field meanings and rules below, then run the tool.
Read observedSizeReductionRatios, signedRatioMinusNominal. Inspect nested result fields where present, and review unknown records separately from known matches.
Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.

Input field	Meaning	Value type	Requirement
observedJawCrusherFeedD80Mm	Observed jaw crusher feed d80 mm	list of number	Required
observedJawCrusherProductD80Mm	Observed jaw crusher product d80 mm	list of number	Required
callerMatchedJawCrusherNominalRatios	Caller matched jaw crusher nominal ratios	list of number	Required

Use aligned positive feed sizes, product sizes and nominal ratios. Divide feed by product and subtract nominal ratio. Product larger than feed is allowed and gives a ratio below one; this is not an energy calculation.

ratio_i=feedD80_i/productD80_i; difference_i=ratio_i−nominal_i

Use the matching field units and the exact boundary, ordering and reference rules above.

Output field	Meaning	Value type
observedSizeReductionRatios	Observed size reduction ratios	list of number
signedRatioMinusNominal	Signed ratio minus nominal; preserve the subtraction order and sign defined in the mechanics	list of number

json

{
  "input": {
    "observedJawCrusherFeedD80Mm": [
      100,
      200
    ],
    "observedJawCrusherProductD80Mm": [
      20,
      100
    ],
    "callerMatchedJawCrusherNominalRatios": [
      4,
      3
    ]
  },
  "output": {
    "observedSizeReductionRatios": [
      5,
      2
    ],
    "signedRatioMinusNominal": [
      1,
      -1
    ]
  }
}

Limitations and assumptions

Units, ledger boundaries, survey interpretation and model applicability must be independently established. These summaries do not assign reserve/resource classifications or establish support adequacy, ventilation safety or an operating setting.

Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Lists and matrices must be dense, without missing cells. Numeric lists allow at most 10000 entries; ordinary string lists allow at most 128 strings of 128 UTF-16 units each; numeric matrices allow at most 128 rows and 128 columns, subject to narrower requirements above.

Alternative or Complementary methods

For a related step, use Reduction Ratio Calculator: A size-reduction ratio compares matched feed and product D80 measurements for overall comminution. For a complementary comparison, use Crushing Work Index Calculator: Crushing-impact work-index calibrations depend on a specified test protocol.

References

Crushing Ratio Calculator — tool.io

Similar or alternative tools

Reduction Ratio Calculator
A size-reduction ratio compares matched feed and product D80 measurements for overall comminution.
Crushing Work Index Calculator
Crushing-impact work-index calibrations depend on a specified test protocol.