Method for calculating iron ore powder mixing working performance by actually measured standard deviation of mixing material pile
A technology of standard deviation and iron ore powder, which is applied in the calculation field of iron ore powder mixing operation process effect, can solve the problems of non-use, difficulty in obtaining autocorrelation function of raw materials, and inaccurate reflection.
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Embodiment 1
[0113] 1) Use formula (5) to get σa:
[0114] σa can be obtained from the pass rate P data of the mixing stockpile measured in production, using the formula (5), that is, Ф(t / σa)=(1+P) / 2;
[0115] Look up the standard normal distribution function value table, get t / σa=1.81,
[0116] σa=t / 1.81=0.008 / 1.81=0.0044.
[0117] 2) Use the theoretical calculation σa to calculate the mixing efficiency of the iron ore powder mixing operation process:
[0118] η = P ( A ) [ 1 - P ( A ) ] / σ a = 0.867 × 0.133 / 0.0044 = 77.176.
[0119] 3) Use the actual measuremen...
Embodiment 2
[0122] 1) Use formula (5) to get σa:
[0123] σa can be obtained from the data of the pass rate P of the mixing stockpile measured in production, using the formula (5), that is, Ф(t / σa)=(1+P) / 2;
[0124] Look up the standard normal distribution function value table, get t / σa=1.15,
[0125] σa=t / 1.15=0.008 / 1.15=0.007.
[0126] 2) Use the theoretical calculation σa to calculate the mixing efficiency of the iron ore powder mixing operation process:
[0127] η = P ( A ) [ 1 - P ( A ) ] / σ a = 0.863 × 0.137 / 0.007 = 49.114.
[0128] 3) Use the actual measu...
Embodiment 3
[0131] 1) Use formula (5) to get σa:
[0132] σa can be obtained from the pass rate P data of the mixing stockpile measured in production, using the formula (5), that is, Ф(t / σa)=(1+P) / 2;
[0133] Check the standard normal distribution function value table, get t / σa=1.75,
[0134] σa = t / 1.75 = 0.008 / 1.75 = 0.0046.
[0135] 2) Use the theoretical calculation σa to calculate the mixing efficiency of the iron ore powder mixing operation process:
[0136] η = P ( A ) [ 1 - P ( A ) ] ...
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