Influences of Granulation Method and Stem Moisture Content on Quality of Tobacco Stem Granules

The effects of granulation methods,stem moisture contents and repetitive granulation on stem waste,granulous stem yield and filling power were studied by orthogonal experiments.The results showed that:1) granulation method significantly influenced stem waste,granulous stem yield and filling power,the F values of significance test were 12.208,5.590,10.372 with the contribution rates of 42.898%,53.410%, 59.822%,respectively; 2) repetitive granulation also obviously affected granulous stem yield,the F value and contribution rate were 11.919 and 41.792%,respectively; 3) stem's moisture content affected these experimental results as well,but not significant; 4) on the whole,hammer granulation was a better method for preparing granulous stem.The suitable stem moisture content was about 30% and repeated granulation for 2 to 3 times.