Research and development extrusion mill is based on extensive experimental work, especially long-term research Shuna De, reviewing test work process Shuna De not only help to understand flour mill extrusion technology, for application, research and the development of this technology is also a great help.

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Shuna De, who learned the crushed material is applied to the cement grinding wheel and the first extrusion materials grinding process and the nature of in-depth research. Shuna De suppose cement grinding process guessed single particle processes were still closed, and that because of different chemical and mineral properties guessed, the product particle size distribution after grinding will change within a certain range.

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His mathematical model based on the card of the day, a list of product particle distribution changes. RRSB uniformity of distribution coefficients of the two curves were 1.0 and 1.3, while both fineness 1.6 The two products were in fine particle size region 2800 and 1900 cm2 / g, but the cement with the same strength.

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Thus, Shuna De considered a decisive influence on the distribution of the material only to the nature of the product for cement products such as particle composition ratio of the area as a standard is not enough. Smash single particle model must take into account the required continuous grinding particles can be a good description of the situation.