Elektr pechlarining turlari bilan tanishtirish

Sanoat qarshilik pechi
② Materialning nisbatan kichik qarshiligi tufayli, kerakli elektr isitish quvvatiga erishish uchun ish oqimi juda katta, shuning uchun elektr uzatish elektrodi va material materialning yoyilishiga va yonishiga yo'l qo'ymaslik uchun yaxshi aloqada bo'lishi kerak, va elektr uzatish avtobusining qarshiligi elektron yo'qotishlarni kamaytirish uchun kichik bo'lishi kerak; Ko'pgina qarshilik pechlari bilvosita isitish qarshiligi pechlari bo'lib, ular issiqlik energiyasini o'choqdagi materiallarga o'tkazadigan elektr isitgich deb ataladigan elektr issiqlik konvertatsiyasiga erishish uchun maxsus mo'ljallangan qarshilik bilan jihozlangan.
Ushbu elektr pechning o'choq qobig'i po'lat plitalardan yasalgan bo'lib, pechka keramik tolalar kabi o'tga chidamli materiallar bilan qoplangan, ichkariga materiallar joylashtirilgan.
Eng ko'p ishlatiladigan isitish elementlari temir xrom alyuminiy isitish elementlari, nikel xromli isitish elementlari, kremniy karbid tayoqlari, molibden disilitsid novdalari va silikon uglerod tayoqlari, zirkonyum diboridli keramik kompozit isitish elementlari. Ehtiyojlarga ko'ra, o'choqdagi atmosfera oddiy atmosfera, himoya atmosferasi yoki vakuum bo'lishi mumkin. Umumiy quvvat manbai kuchlanishi 220 V yoki 380 V. Agar kerak bo'lsa, sozlanishi kuchlanishli oraliq transformator tuzilgan. Kichik pech (<10 kW) single-phase power supply, large furnace three-phase power supply. For materials with a single variety and a large batch size, continuous furnace heating should be used. For resistance furnaces with furnace temperatures below 700 □, most are equipped with blowers to enhance heat transfer in the furnace and ensure uniform heating. Resistance furnaces for melting fusible metals (lead, lead bismuth alloys, aluminum, magnesium, and their alloys) can be made into crucible furnaces; Or it can be made into a reverberatory furnace with a molten pool, and an electric heating body is installed on the top of the furnace. Electroslag furnace is a resistance furnace that realizes electrothermal transformation by dissolving slag (see Electroslag Remelting).