Wet comminution in stirred media mills — research and its practical application

Breaking characteristics of different materials and their effect on stress intensity and stress number in stirred media mills

Mechanical production and stabilization of submicron particles in stirred media mills

Nanomilling in stirred media mills

Motion and stress intensity of grinding beads in a stirred media mill. Part 2: Stress intensity and its effect on comminution

Les parametres les plus importants et leurs effets sur le broyage sont demontres, ainsi qu'expliques par un modele et les consequences pour les conditions operatoires des broyeurs a boulets agites sont presentees

Naßmahlung in Rührwerksmühlen

Systems for the charging or discharging of bulk solids into or out of pressure chambers. In many branches of chemical and dressing technology there are compelling thermodynamic or economic reasons for carrying out various processes at pressures deviating from ambient values. If the reactants and products of these processes are dusts or granular solids then numerous problems are encountered on transfer between regions of higher or lower pressure. On the one hand, the properties of the feed (such as particle size, flow behaviour) should undergo the slightest possible modification, and on the other hand the transport of the material between the regions of differing pressure should be as continuous as possible. Moreover, the gas transport should be kept low. Pressure swing in the process region is to be avoided. The aim of this study was to survey all systems suitable for introduction or removal of bulk solids into or out of chambers at pressures other than the ambient value. The various pressure locks are assessed qualitatively for given tasks. A new solution is presented for the discharge of filter cake from high-pressure chambers.

/pdf/systeme-zum-ein-oder-austrag-von-schuttgutern-in-oder-aus-4gg4h1z53u.pdf

Systeme zum Ein- oder Austrag von Schüttgütern in oder aus Druckräumen

Dispersion process in which a material for grinding, consisting of solids and a liquid phase, is introduced and then conveyed in an agitator mill (1) containing grinding bodies, in said mill energy is fed by means of rotating rotors (2) to the material for grinding and the solids are comminuted and wetted with the liquid phase, the rotors (2) rotating at such a high speed that the grinding bodies moved by them form, as a result of the centrifugal force, a rotating grinding body ballast (9) being applied against the inner wall of the mill container of the agitator mill, a space which is essentially free of grinding bodies being produced in the centre of this grinding body ballast (9) and the grinding body ballast flowing through radially from the outside to the inside counter to the centrifugal action in such a way that a centrifugal fluidised bed is produced with respect to the grinding bodies and then the material for grinding is led out of the grinding body-free space by a grinding body separating device (4), the material for grinding being introduced axially into the space which is essentially free of grinding bodies and being deflected by a baffle plate (10) towards the inner wall of the grinding container of the agitator mill, a radial flow through the grinding container being predominantly brought about.

Reinhold Stadler

Papers

Naßmahlung in Rührwerksmühlen

Systeme zum Ein- oder Austrag von Schüttgütern in oder aus Druckräumen

Dispersion process and agitator mill for carrying out the process.