Ural Federal University

A. M. Vokhmyakov, Postgraduate Student, e-mail: botia86@mail.ru

M. D. Kazyaev, Professor

"Scientific and Production Company" UralTermoKompleks " Ltd

D. M. Kazyaev, Commercial Director

Results of the calculation of heat transfer in separate sections of continuous heating furnace in case of heating of copper slabs were published in this article. Acquisition of the information of convective heat transfer in case of heating of slabs in the furnace, equipped with high-speed recuperative burners, which work in pulsed mode, is the purpose of the calculation. A data processing procedure for detection of convective heat transfer was developed on base of the experimental data and described in the article. In the course of the experiments in furnace, we registered the time of passing of the control slabs through the furnace sections and change of the measurable center temperature in the process of heating of the slabs. And with the help of calculation we determined the surface temperature and weight-average temperature. As a result, we get a possibility of calculation of the quantity of heat and rate of flow balance, received in the process of their heating in the furnace. The heat flow density was calculated on base of the known furnace geometry and metal charges, characteristics of heat transfer between gases, metal and brickwork. The density of heat flow, received by metal by means of convection, was calculated on base of difference between flow balance and radiant heat flow. After the calculation we got the heat transfer coefficients: total, radiant and convective heat transfer coefficients. As a result of the calculations, we found that the portion of convection in case of heating of copper slabs in continuous heating furnace at the temperature of 920–930 ^оС in the furnace laboratory is 50.5%. On the basis of the findings, we can make a definite conclusion that use of the high-speed burners, firstly, results in intensification of the convective heat transfer, its portion was 50.5% even at the temperature of 930 ^oС according to the experimental data, and, secondly, ensures equalized distribution of the temperature fields in the furnace laboratory. Importance of the data lays in its acquisition in the process of work with operational unit and under adherence to all of the technological requirements to metal heating.

1. Kazyaev M. D., Vokhmyakov A. M., Kazyaev D. M., Ryaposov A. I., Simonov D. V. Tsvetnye Metally — Non-ferrous Metals. 2011. No. 4. pp. 85–89.
2. Vokhmyakov A. M., Kazyaev M. D., Arseev B. N., Kazyaev D. M., Ryaposov A. I. Izvestiya vuzov. Chernaya metallurgiya. — Proceedings of Higher Schools. Ferrous Metallurgy. 2009. No. 12. PP. 56–59.
3. Kazantsev E. I. Promyshlennye pechi : spravochnoe rukovodstvo dlya raschetov i proektirovaniya (Industrial Furnaces : reference manual for calculations and design). Moscow, 1975. 368 p.
4. Teplotekhnicheskie raschety metallurgicheskikh pechey. Pod red. A. S. Telegina (Thermotechnical Calculations of Metallurgical Furnaces. Ed. A. S. Telegin). Moscow, 1970. 528 p.
5. Teplotekhnicheskie raschety metallurgicheskikh pechey. Pod red. A. S. Telegina (Thermotechnical Calculations of Metallurgical Furnaces. Ed. A. S. Telegin). Moscow, 1982. 360 p.
6. Gusovskiy V. L., Lifshits A. E. Metodiki rascheta nagrevatelnykh i termicheskikh pechey : uchebno-spravochnoe izdanie (Design Procedures for Reheating and Heat-treatment Furnaces : teaching and reference book). Moscow, 2004. 400 p.
7. Bruk V. D., Neymark L. A., Vibke R. L. Sb. trudov «Pechi mashinostroitelnoy promyshlennosti» (Collection of Proceedings “Furnaces of Engineering Industry”). 1975. No. 36. Moscow, 1975. pp. 89–97.
8. Arutyunov V. A., Astsaturov V. N., Berkovskaya P. S. Sb. trudov «Pechi mashinostroitelnoy promyshlennosti» (Collection of Proceedings “Furnaces of Engineering Industry”). 1975. No. 36. Moscow, 1975. pp. 19–30.
9. Malikov G. K., Korshunov V. A., Lobanov D. L. Tematicheskiy otraslevoy sb. «Metallurgicheskaya teplotekhnika» (Topical Industrial Collection of Articles “Metallurgical Heat Engineering”). 1976. No. 5. Moscow, 1976. pp. 94–98.
10. Krasnokutskiy P. G. Sb. trudov «Konstruktsii i stroitelstvo teplovykh agregatov» (Collection of Proceedings “Design and Construction of Thermal Aggregates”). 1979. No. 48. Moscow, 1979. pp. 96–97.
11. Vokhmyakov A. M., Kazyaev M. D., Arseev B. N., Kazyaev D. M. Tr. Vserossiyskoy nauchno-prakticheskoy konferentsii «Teoriya i praktika nagrevatelnykh pechey v XXI v.» (Proceedings of the All-Russian Scientific and Practical Conference "Theory and Practice of Reheating Furnaces in XXI century"). Ekaterinburg, 2010. pp. 74–82.