Comparative analysis towards the use of needle-shaped working body in sieve and sieve-free multifaceted crushers

Abstract

The paper provides comparative studies about the use of a needle-shaped working body in a sieve and sieve-free crusher of a multifaceted type. The possibility of reducing the energy intensity regarding the process of grinding feed grain is revealed, taking into account the quality of the end product in a hammer-type multifaceted crusher of a sieve-free type by using the needle-shaped shock elements in a crushing chamber.To identify the influence patterns of the needle-shaped working elements on the quality and energy indicators of the working process in crushing feed grain performed by a sieve-free multifaceted type crusher, a rotor was produced and tested experimentally.In the research the energy indicators were measured by the standard method, crusher performance was determined, and a grinding module and the qualitative composition of the crushed product were defined. Based on the research results, the experimental dependencies were built, which allowed to identify the following structural and technological parameters of the crusher: the optimal number of shock elements placed on the rotor; peripheral speed of the working bodies; specific energy consumption; the composition of the particle-size product with a different grinding module, the presence of pulverulent fractions (< 0.2 mm), as well as the amount of coarse fraction (> 2 mm). The experimental results have confirmed the feasibility of using the needle-shaped working element in a sieve-free crusher of a multifaceted type.