National University of Science and Technology “MISIS”, Novotroitsk affiliate (Novotroitsk, Russia)

I. V. Kotov, Assistant, Dept. of Metallurgical Technologies and Equipment (MTE), e-mail: ivk92@yandex.ru
R. Yu. Litvinov, Student, Dept. of MTE, e-mail: nfmisis@yandex.ru
A. V. Nefedov, Cand. Ped., Associate Prof., Head of the Dept. of MTE, e-mail: cosnovotr@rambler.ru

National University of Science and Technology “MISIS” (Moscow, Russia)
O. N. Chicheneva, Cand. Eng., Associate Prof., Dept. of Computer-Aided Design and Engineering, e-mail: ch-grafika@mail.ru

It was established as a result of the analysis of the operability of bunkers for temporary storage and dosage of bulk materials in the dosage site of the sintering shop, that an arching effect in the process of their long-term operation appears; this effect concludes in sticking of materials above the hopper outlet, which are temporarily or permanently preventing material flow. For normal operation of dosing devices, it is necessary to ensure the continuous flow of material from the bins, since the main purpose of the dosage is to ensure continuous material flow from hoppers, because production of sinter with established quality and constant physicochemical properties is the main aim of dosing. To eliminate hangings in hoppers along their walls, manual labor is used, which poses a high danger to human health, due to high dustiness and high trauma hazard of the work performed. In order to eliminate the problem of arching and sticking, it is proposed to apply a vibrating method for influencing on charge materials, namely installation of a vibrating device of the “false wall” type. This device is a vibration exciter (vibrator), rigidly fixed on a vibrating panel via support element. A vibrating shield (false wall) is a steel plate that makes oscillating motions. There is a rubber damper between vibrating shield and hopper wall, designed to protect both these components against wear. The main advantages of using a vibrating device of the “false wall” type are small capital costs for reengineering, simplicity of installation and suitability for use in a sintering shop. Introduction of the designed device ensures improvement of manufactured sinter quality by improving flowability of materials in the dosage site of the sintering shop and a more accurate dosage, as well as rejection of operations associated with cleaning of hoppers, which are hazardous for human health. The economic calculation confirms the feasibility of the conducting measures for reengineering of hoppers in the conditions of a sintering shop.

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