Institute of Engineering Sciences (IMASH) named after E. S. Gorkunov, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russia:

N. A. Babailov, Cand. Eng., Senior Researcher, Laboratory of Applied Mechanics, e-mail: n.a.babailov@urfu.ru

Ural Federal University named after the first President of Russia B.N. Eltsin, Ekaterinburg, Russia:
Yu. N. Loginov, Dr. Eng., Professor, Dept. of Metal Forming

CJSC Spaydermash, Ekaterinburg, Russia:
L. I. Polyansky, Director

The results of experimental studies carried out on two types of slag-forming materials widely used in ferrous metallurgy: metallurgical lime (calcium oxide CaO) and magnesium oxide (soft-burned magnesite or brucite, MgO) are presented. It is determined that these materials are well compacted by the method of "dry" briquetting (briquetting without binder and moisture), with obtaining sufficiently strong briquettes. The influence of the technological parameter of roller briquetting - the gap between the working rolls (bandages) of the briquetting press on the density, open porosity and relative performance of the roller press was studied. The probability of occurrence of cracks on the surface and in the volume of the briquette was studied. The dependences of the current density of the material being briquetted (CaO and MgO) on the pressing pressure, the so-called compression curves, have been determined. The change in the density of the briquette from the size of the gap between the rolls of the press, equal to the thickness of the bridge between the briquettes, is determined. The influence of the gapbetween the rolls on the relative productivity of the roller press in terms of mass and volume is presented. The relative performance, reduced to one received briquette, is determined. The results obtained are approximated by simple mathematical functions. The density of the briquettes is represented by an exponential function, and the results for the open porosity of the magnesia briquettes and the relative performance of the roller press are exponential functions.

The work was carried out within the framework of theme No. 0391-2016-0001 (АААА-А18-118020790140-5) and with the partial financial support of Decree No. 211 of the Government of the Russian Federation, contract No. 02.A03.21.0006.

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