50 posts
TimePosted 27/07/2009 12:02:17

### 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
TimePosted 28/07/2009 06:47:57

### 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.```

50 posts
TimePosted 28/07/2009 14:26:52

### 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 ?