EXPERIMENTAL RESEARCHES OF WORKING PARAMETERS OF SPIRAL SCREWS FOR DISPENSING OF SLAGGING MIXTURES IN MOLDS OF CONTINUOUS CASTING MACHINES

S P Eron’Ko,E V Oshovskaya,B I Starodubtsev,M V Yushchenko

doi:10.17073/0368-0797-2014-9-33-40

Abstract

The application prospects of dispensing systems for slagging mixtures in molds of continuous casting machines are illuminated and the necessity of their further improvement, in particular, through the use of spiral screw, is substantiated. The method and results of experimental researches of design and power parameters of ﬂexible screws are given with inner diameter 15, 20 and 25 mm. They transport the ﬁne granular materials by steel coils rotated with a frequency of 250–500 rpm and differed by outer diameters (11, 16 and 18 mm) and pitch of coils (5, 10, 15 and 20 mm). It is found, that the dependence of volume efﬁciency of spiral screw from rotation frequency of the working part in the studied range is linear for the tested combinations of geometrical parameters of the transporting device. Noticeable effect on the ﬂow characteristics of the screw system has a ratio of spiral coil pitch Sv and its outer diameter dsp . The dependence of the change of spirals volume ﬂow for one of its turnover from this ratio has a non-linear form with a maximum in the range Sv /dsp = 0.9–1.1, and the minimum speciﬁ c energy of spiral screw was ﬁ xed at the values of Sv /dsp = 0.5–0.6. The obtained data are used during the calculation and construction of a linear series of next generation dispensing slag-forming mixtures systems in molds of continuous casting machines with different cross-section.

Highlights

associated solutions is quite acceptable for description of thermodynamic properties
The use of model for prediction of thermodynamic properties of real multicomponent solutions is possible under condition of independent definition
(Eng.), Professor , Head of the Chair “Mechanical equipment of ferrous metallurgy plants” (ersp@meta.ua ) Oshovskaya E.V., Cand

Summary

Introduction

ЭКСПЕРИМЕНТАЛЬНЫЕ ИССЛЕДОВАНИЯ РАБОЧИХ ПАРАМЕТРОВ СПИРАЛЬНЫХ ШНЕКОВ ДЛЯ ПОДАЧИ ШЛАКООБРАЗУЮЩИХ СМЕСЕЙ Установлено, что зависимость объемной производительности спирального шнека от частоты вращения рабочего органа в исследованных пределах носит линейный характер для опробованных сочетаний геометрических параметров транспортирующего устройства.

Results

Conclusion