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    Abrasion Test: Feed Sample Requirements

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    Thiago Jatobá
    The document describes the abrasion test method developed by Allis-Chalmers to determine the Abrasion Index of ore samples. The test uses a rotating drum and impact paddle to abrade 1.6 kg of ore sample. The Abrasion Index is determined from the weight loss of the hardened steel paddle under standard test conditions. The Bond Abrasion Test then uses the Abrasion Index to correlate and predict wear rates of steel media and liners in crushers, mills, based on formulas developed by Bond.

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    Abrasion Test: Feed Sample Requirements

    Uploaded by

    Thiago Jatobá
    136 views1 page
    The document describes the abrasion test method developed by Allis-Chalmers to determine the Abrasion Index of ore samples. The test uses a rotating drum and impact paddle to abrade 1.6 kg of ore sample. The Abrasion Index is determined from the weight loss of the hardened steel paddle under standard test conditions. The Bond Abrasion Test then uses the Abrasion Index to correlate and predict wear rates of steel media and liners in crushers, mills, based on formulas developed by Bond.

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    Abrasion Test

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    The document describes the abrasion test method developed by Allis-Chalmers to determine the Abrasion Index of ore samples. The test uses a rotating drum and impact paddle to abrade 1.6 kg of ore sample. The Abrasion Index is determined from the weight loss of the hardened steel paddle under standard test conditions. The Bond Abrasion Test then uses the Abrasion Index to correlate and predict wear rates of steel media and liners in crushers, mills, based on formulas developed by Bond.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as DOCX, PDF, TXT or read online from Scribd
    Download as docx, pdf, or txt
    136 views1 page

    Abrasion Test: Feed Sample Requirements

    Uploaded by

    Thiago Jatobá
    The document describes the abrasion test method developed by Allis-Chalmers to determine the Abrasion Index of ore samples. The test uses a rotating drum and impact paddle to abrade 1.6 kg of ore sample. The Abrasion Index is determined from the weight loss of the hardened steel paddle under standard test conditions. The Bond Abrasion Test then uses the Abrasion Index to correlate and predict wear rates of steel media and liners in crushers, mills, based on formulas developed by Bond.

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    ABRASION TEST

    The abrasion test was developed by Allis-Chalmers* using a method and apparatus used by the Pennsylvania Crusher Division of Bath Iron Works Corp. The equipment consists of a rotating drum into which dry ore samples are placed, with an impact paddle mounted on a centre shaft rotating at a higher speed than the drum. The paddle is made from standard alloy steel hardened to 500 Brinell. The Abrasion Index is determined from the weight loss of the paddle under standard operating conditions. Feed Sample Requirements: 1.6 kg of minus 34 plus 12 ore. This can normally be obtained by taking 5 kg of ore crushed to minus 34 and screening at 12.

    The Bond Abrasion Test determines the Abrasion Index, which is used to determine steel media and liner wear in crushers, rod mills, and ball mills. Bond developed the following correlations based on the wear rate in pounds of metal wear/kWh of energy used in the comminution process.

    Rods Wet rod mill Liners Balls Wet ball mill Liners Balls Dry ball mill Liners

    lb/kWh lb/kWh lb/kWh lb/kWh lb/kWh lb/kWh

    = = = = = =

    0.35(Ai 0.020)

    0.2

    0.035(Ai 0.015) 0.35(Ai 0.015)

    0.3

    0.33

    0.026(Ai 0.015) 0.05Ai


    0.5

    0.3

    0.005Ai

    0.5

    Crushers (gyratory, jaw, cone)

    Liners Roll shell

    lb/kWh

    (Ai + 0.22)/11
    0.667

    Roll crushers

    lb/kWh

    (0.1Ai)

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