Rotor-screw systems for preparation of cement clinker

Introduction. Presents an approach to research rotor-screw systems for cement clinker production. Main tasks in the production of cement clinker in a rotary furnace whose housing is horizontal are reducing the size, increasing productivity, simplifying the operation, reducing the energy intensity. Considered equipment construction, allowing to solve these problems. Materials and method. A comprehensive research method was used in the work. Analytical methods have made it possible to create a methodology for calculating the screw housing of a rotary kiln for the preparation of cement clinker. The search for designs of screw housings was performed using descriptive geometry and engineering graphics using the Kompas-3D software package. An analytical study of physical phenomena occurring in the contact zone of cement clinker granules used an apparatus of dimensionless kinematic functions (similarity invariants) and dimensional analysis. The application of similarity invariants made it possible to investigate not just one case, but an infinite number of different cases, united by some commonness of properties. Experimental studies were carried out on models to confirm the validity of theoretical positions and analytical dependencies. Results. The results of research of rotor-screw systems for cement clinker production are presented. The designs of screw housings for rotary kilns are proposed. They, in comparison with known designs of a similar purpose, significantly increase productivity, reduce the dimensions, weight of furnaces and power consumption, due to their implementation with screw grooves. Conclusions. Technical solutions protected by 17 patents of the Russian Federation are offered. The proposed technologies and design schemes of equipment are designed to increase the rotational speed of the screw-like housing at the rotary kiln several times, which will give us an increase in productivity, while reducing the dimensions of the rotary kiln. The novelty of the research is to obtain dependencies for calculating the speed of longitudinal movement of cement clinker granules in the screw casing of rotary kilns, as well as to create a new classification of rotary-screw systems for the preparation of cement clinker.