St. Petersburg State Polytechnic University (St. Petersburg, Russia):

Butorina I. V., Dr. Eng., Prof., E-mail: butorina_irina@mail.ru
Kapustin I. K., Post-graduate

The sources of dust emission in rolling mills were examined. It is shown that the operations following cooling of rolled metal such as cutting, ultrasonic inspection, cleaning and storage, are the most powerful of them. The properties of dust generated at the facility of ultrasonic testing of rolled metal are specifi ed. Chemical and dispersed dust analysis forming at the ultrasonic control area in the conditions of sheet rolling shop No. 3 at «Severstal» metallurgical works in Cherepovets is conducted via the method of spectral analysis. It was found out that this dust consists of Fe₂O₃ and Fe₃O₄ oxides. The equations to calculate the power of emission and specific dust formation perton of rolled metal are proposed. The sources of dust formation in rolling shops are characterized and classified. It is shown that the formation of dust in the rolling mills depends on the method of metal cooling. Water cooling increases corrosion of the surface of rolled metal by 25% and also increases dust formation during all subsequent operations. It is concluded that amount of forming dust have to depend on metal oxidation rate, type of oxidant and duration of its effect on metal.

1. Butorina I. V., Ulamov Yu. V. Ekologicheskie pokazateli prokatnogo proizvodstva (Ecological indicators of rolling). Chernye Metally = Ferrous metals. 2013. No. 3. pp. 23–26.
2. Available at: http://www.znaytovar.ru/gost/2/GN_225131303_Predelno_dopustim.html (in Russian).
3. Mariupolskiy metkombinat «Azovstal». Ekologicheskiy pasport. AT 72648. Azovgipromez (Mariupol metallurgical combine “Azovstal”. Ecological passport. AT 72648. Azovgipromez). Mariupol, 1991. (in Russian).
4. Proekt predelno dopustimykh vybrosov Otkrytogo Aktsionernogo Obshchestva «Severstal» (Project of maximum permissible discharges of JSC “Severstal”). Saint Petersburg : Lengipromez, 2007. (in Russian).
5. Proekt normativov predelno dopustimykh i vremenno soglasovannykh vybrosov zagryaznyayushchikh veshchestv v atmosferu (Project of standards of maximum and temporarily conformed contaminant emissions in atmosphere). JSC “Novolipetsk Metallurgical Combine”. 2014. (in Russian).
6. EUROPEAN COMMISSION Integrated Pollution Prevention and Control (IPPC) Best Available Techniques Reference Document on the Production of Iron and Steel. December 2001.
7. GOST 28831-90. Prokat tolstolistovoy. Metody ultrazvukovogo kontrolya (State Standard 28831-90. Rolled plates. Ultrasonic test methods). Moscow : Russian State Standard. (in Russian).
8. Gubinskiy V. I., Minaev A. N., Goncharov Yu. V. Umenshenie okalinoobrazovaniya pri proizvodstve prokata (Reduction of cinder-formation during rolling production). Kiev : Tekhnika, 1981. 136 p.