Kodi zofunikira za graphite electrode pa ng'anjo ya DC arc ndi ziti?

Ma electrode a graphite omwe amagwiritsidwa ntchito mu ng'anjo ya DC arc alibe mphamvu yapakhungu ikadutsa, ndipo yapano imagawidwa mofanana pamtanda wapano. Poyerekeza ndi ng'anjo ya AC arc, kachulukidwe kameneka kudzera pa elekitirodi akhoza kuonjezedwa moyenera. Kwa ng'anjo zamagetsi zamphamvu kwambiri zokhala ndi mphamvu zolowera zomwezo, ng'anjo za DC arc zimagwiritsa ntchito elekitirodi imodzi yokha, ndipo m'mimba mwake ma elekitirodi ndi okulirapo, monga ng'anjo zamagetsi za 100t AC zimagwiritsa ntchito maelekitirodi okhala ndi mainchesi 600mm, ndi ng'anjo za DC 100t zimagwiritsa ntchito. ma elekitirodi ndi awiri a 700mm, ndi zazikulu DC arc ng'anjo amafuna maelekitirodi ndi awiri a 750-800mm. Katundu wapano nawonso ukukulirakulira, kotero izi zimayikidwa patsogolo pamtundu wa elekitirodi ya graphite:

(1) Mlingo wabwino wa elekitirodi thupi ndi olowa ayenera kukhala ang'onoang'ono, monga resistivity ma elekitirodi thupi yafupika pafupifupi 5.μΩ·m, ndipo resistivity ya olowa imachepetsedwa kukhala pafupifupi 4μΩ·m. Kuchepetsa resistivity wa graphite elekitirodi, kuwonjezera pa kusankha apamwamba singano coke zipangizo, kutentha graphitization ayenera ziwonjezeke moyenerera.

(2) Mzere wowonjezera wowonjezera wa thupi la elekitirodi ndi cholumikizira chiyenera kukhala chochepa, ndipo gawo la axial ndi ma radial liniya yowonjezera ya thupi la elekitirodi liyenera kukhala ndi ubale woyenerera ndi cholumikizira cholumikizira cholumikiziranacho molingana ndi kukula kwake. kachulukidwe kakudutsa.

(3) The matenthedwe madutsidwe wa elekitirodi ayenera kukhala mkulu. Kuthamanga kwapamwamba kwa kutentha kungapangitse kutentha kwa graphite electrode mofulumira, ndipo kutentha kwa radial kutentha kumachepetsedwa, motero kuchepetsa kupsinjika kwa kutentha.

(4) ili ndi mphamvu zamakina zokwanira, monga mphamvu yopindika ya ma elekitirodi amafika pafupifupi 12MPa, ndipo mphamvu ya olowa ndi yayikulu kwambiri kuposa thupi la elekitirodi, lomwe nthawi zambiri liyenera kukhala la 1 nthawi zambiri. Pamalo olumikizirana, mphamvu yamagetsi iyenera kuyeza, ndipo torque yovotera iyenera kugwiritsidwa ntchito pambuyo pa kulumikizidwa kwa ma elekitirodi, kuti malekezero awiri a electrode akhalebe ndi kukakamiza kolimba.

(5) The porosity ya elekitirodi ayenera kukhala otsika kuchepetsa makutidwe ndi okosijeni kumwa kwa elekitirodi pamwamba.