51 posts
what is Rosine Rammler ?
Dear experts
i would like to know what is rosine rammler dist. calculation and what is it used for and what is it indicate
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29 posts
Re: what is Rosine Rammler ?
The Rosine Rammler's distribution curve helps to predict the product size after milling and grinding.It is a mathematical model to find out PSD .
Y = 1-EXP(-(Ln(X)/Ln(D))^q)
The distribution is described in terms of 2 parameters, D and q:
- D is a representative diameter, commonly chosen such that 63.2% the
total volume is contained in particles smaller than D. - The exponent q provides a measure of the spread of drop sizes. The
higher the value of q, the more uniform the spray. If q is
infinite the drops in the spray are all the same size. For typical
sprays, the value of q is between 1.5 and 4.
51 posts
Re: what is Rosine Rammler ?
thx so much for ur response by is it applied for raw material grinding or cement grinding or for both ?
324 posts
Re: what is Rosine Rammler ?
The Rosin Rammler distribution is a way of characterising the particle size distribution of powders in the size range encountered in the cement industry. To find it you have to plot the natural logarithmn of the sieve grain size (90u, 45u, 32u etc.) against the double natural logarithmn of 100/residue at that grain size and find the slope and position parameter of the line of best fit. I recommend joining the CemNet Grinding & Milling on-line training course for more information.