Grinding, of solids

To reduce or eliminate unwanted peaks or tails in a particle size distribution curve (see Figs. 2b and 6), milling can be applied to break apart the chains of the abrasive particles. Milling is a process for continuous dispersion and wet fine grinding of solid in a liquid phase. It is essential that besides breakage of chains no other chemical reactions occur under the... 

Example 11 Fine Grinding of Solids in Stirred Ball Mills... 

The flne grinding of solids in mills of different shape and mode of operation is used to produce the finest particles with a narrow particle size distribution. Therefore—as in the previous example—the target quantity is the median value dso of the particle size distribution. 

Example 30 Fine grinding of solids in stirred media mills... 

Example 30 Fine grinding of solids in stirred media mills 129 Example 31 Scale-up of flotation cells for waste water purification 133 Example 32 Description of the temporal course of spin drying in centrifugal filters 140... 

Investigation of the role that liquid media play in the intensification of the grinding of solid materials is one of the main subjects of physico-chemical mechanics described in Chapter IX. The role of surfactants is equally important in the emulsification and foaming of liquids, which are processes broadly used in various technologies across the chemical, pharmaceutical, and food industries. 

Similarly to all other disperse systems, aerosols may be obtained (see Chapter IV) by both dispersion of macroscopic phases and condensation [5]. Aerosols generated as a result of macroscopic phase dispersion are, as a rule, characterized by a rather low degree of dispersion and are more polydispersed as compared to aerosols prepared by condensation. Dispersion methods of aerosol generation are used to prepare various important materials. These methods include the preparation of powders by grinding of solid materials, nebulizing liquid fuel ( in order to achieve a more efficient combustion), spraying pesticides and paints, etc. In nature dispersion processes lead to the formation of dust. 

Dispersed aerosols Grinding of solids and dispersion of dust... 

According to Paloposki [8], Griffith [15] was probably the first to develop a PDF based on the concept of maximum entropy when he applied it to the grinding of solids. Sellens and Brzustowski [3] and Li and Tankin [4] were the first to use MEF to predict drop size distributions. 

On deposition, the molecules of a given analyte form randomly oriented crystallites on the zinc se-lenide window. These crystallites are similar to the crystallites that are formed on grinding of solid samples during the preparation of KBr disks or mineral-oil mulls. Not surprisingly, therefore, the spectra of compounds obtained by direct deposition GC-IR are very similar to the KBr-disk spectra of the... 

Rittinger (1867) considered that for the grinding of solids, the energy required should be proportional to the new surface produced and gave to the power n the value of 2, obtaining thus the so called Rittinger s law by integration of Equation 4.1 ... 

Colloidal-sized atmospheric particle Famed by condensation of vapors or reactions of gases Famed by grinding of solids, atomization of liquids, or dispersion of dust Tam denoting a high level of water droplets Denotes decreased visibility due to the presence of particles Liquid particles... 

Dispersion aerosol Formed by grinding of solids, atomization of liquids, or dispersion of dusts... 

---