Pulp and paper magazine of Canada . umption for the circulation was noticed at the commence-ment, as mentioned above, and is explained by the rapidshortening of the stuff, a phenomenon which occurs to agreater extent in this kind of raw material than in the caseof cellulose. With reference to table 1 it is to be noticed that for thepapers 1 to 3, very strong linen was employed, whilst forthe paper 4 less strong material sufficed. Almost the wholeof the tailings used were taken from former makes oi thepapers in question. In tables 2 the most important values resulting fromthe tests, and shown i
Pulp and paper magazine of Canada . umption for the circulation was noticed at the commence-ment, as mentioned above, and is explained by the rapidshortening of the stuff, a phenomenon which occurs to agreater extent in this kind of raw material than in the caseof cellulose. With reference to table 1 it is to be noticed that for thepapers 1 to 3, very strong linen was employed, whilst forthe paper 4 less strong material sufficed. Almost the wholeof the tailings used were taken from former makes oi thepapers in question. In tables 2 the most important values resulting fromthe tests, and shown in the diagrams, are ash contents of whole stuff, without any addition offilling materials, were ascertained on the one hand, and onthe other hand those of finished paper including fillingmaterials. The contents of the beater in pure fibre stuffs,calculated from the density of the pulp, are given in column6, from which the result in finished paper may be obtainedby adding the percentage of ash contents of the paper to. 682 PULP AND PAPER MAGAZINE October L5, 1913 the fibre stuff. The losses in the paper machine are ne-glected. In diagram No. 1, for instance, the pure fibrestuffs amounted to 389 kgs, 100—5 (ash contentsof the paper) = 95%; consequently inn, of 119 kgs offinished paper. The next column gives the time in minutes required forthe beating process of each engine, and in the followingcolumn the total power consumption obtained from thediagrams. This latter was divided into power for emptyrunning, circulation of pulp, and beating work includingthe friction of the knives. The last three columns showthe individual cost of power in percentages of the totalpower consumption. In order to permit of a comparison between the indi-vidual kinds of stuff, table 3 was made, giving firstly thetotal power consumption, and secondly the total power con-sumption divided up into the work done in each individualengine, as well as the duration of treatment of 100 kgs o
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