Lub zog siab thiab qis zog graphite electrodes zoo ib yam ntawm lub tshuab ua kom sov, tab sis lawv raug muag raws li cov npe qib sib txawv thiab muaj qhov sib txawv tam sim no. Misidentifying lawv ua rau cov lus qhia overloaded, kem tawg thiab zam lub sijhawm poob qis. Qhov sib txawv tuaj yeem tsim los ntawm cov ntaub ntawv ua ntej, tom qab ntawd lees paub los ntawm kev ntsuas lub cev.
Qib txhais los ua ntej
Peb tsev neeg ua lag luam yog lub zog tsis tu ncua (RP), siab zog (HP) thiab ultra- siab zog (UHP). Qhov sib txawv tsis yog tshuaj pleev ib ce: nws qhia txog cov khoom siv raw, txoj kev tsim, tus naj npawb ntawm impregnation cycles thiab lub sij hawm graphitization. RP electrodes yog tsim los ntawm daim txhuam cev coke thiab lees txais qhov ceev tam sim no; HP electrodes siv coke zoo dua thiab tswj cov txheej txheem nruj dua; UHP electrodes yuav tsum tau koob coke thiab graphitized rau siab tshaj plaws lattice txiav txim. Ib tus neeg muag khoom uas tsis tuaj yeem hais txog tsev neeg qib thiab qhov sib thooj tam sim no qhov sib txawv tsis yog muab qhov kev siv tau.
Cov ntaub ntawv: Kev Tshawb Xyuas Ceev tshaj plaws
Pib nrog daim ntawv pov thawj zeb xeem thiab cov ntaub ntawv soj ntsuam qhov ntev. The certificate should carry heat number, grade, diameter, length, and results for electrical resistivity, bulk density, flexural strength, ash and, where relevant, apparent porosity. Cov txheej txheem xeem yog ib txwm ASTM C611 rau kev tiv thaiv, ASTM C559 rau qhov ntom ntom, ASTM C651 rau flexural zog, ASTM C1025 rau kev hloov pauv ntawm kev tawg thiab ASTM C1039 rau porosity. Yog tias daim ntawv pov thawj sau ib daim duab uas tsis muaj txoj hauv kev lossis tus lej ntsuas kub, qhov kev thov qib tsis tuaj yeem txheeb xyuas tau.
Ntsuas Cov Khoom Sib Txawv
| Khoom | Lub zog tsis tu ncua | Siab zog | Ultra{0}} lub zog siab |
|---|---|---|---|
| Kev tiv thaiv hluav taws xob (micro-ohm-m) | 8.5-9.0 Nws | txog 6.0-6.5 | txog 4.5-5.8 |
| Qhov ceev (g / cm3) | 1.52-1.58 Nws | 1.60-1.66 Nws | 1.66-1.73 Nws |
| Flexural zog (MPa) | txog 6.5-10 | txog 10-13 | txog 12-16 |
| Tshauv (feem pua) | mus txog 0.5 | mus txog 0.3 | mus txog 0.2 |
| Qhov ceev tam sim no (A / cm2) | mus txog 20 | txog 20-30 | txog 25-30 thiab siab dua |
Cov txiaj ntsig saum toj no yog cov qauv luam tawm rau peb tsev neeg ntau dua li cov kev txwv tshwj xeeb; daim ntawv cog lus yog cov nyob rau hauv daim ntawv pov thawj pom zoo. Kev kuaj xyuas qhov chaw pabcuam yog qhov sib piv: qhov ntsuas qis dua thiab qhov hnyav dua electrode ntawm tib lub nominal txoj kab uas hla ob taw tes rau qib siab dua.
Cov lus nug nquag
Q:Kuv puas tuaj yeem qhia qib los ntawm cov xim ntawm cov electrode?
A: Tsis yog. Xim thiab qhov chaw ua tiav qhia txog kev siv tshuab thiab txheej, tsis yog qib. Resistivity, ntom thiab daim ntawv pov thawj xeem txiav txim rau qib tsev neeg.
Q:Dab tsi yog qhov chaw kuaj pom muaj txiaj ntsig zoo tshaj plaws?
A: Kev tiv thaiv hluav taws xob, vim tias nws cais peb tsev neeg kom meej meej thiab txhais ncaj qha rau hauv Joule poob hauv kem.
Q:Puas yog lub txiv mis ib txwm zoo ib yam li cov electrode?
A: Nws yuav tsum yog tsawg kawg yog sib npaug. Lub txiv mis tsis muaj zog dhau los ua qhov tsis ua tiav ntawm kab txawm tias lub cev yog cov khoom siv qib siab tiag tiag.
Q:Cov hluav taws xob hluav taws xob tsawg puas tuaj yeem siv rau hauv lub tshuab hluav taws xob siab?
A: Tsuas yog txo qhov ceev tam sim no. Applied saum toj no nws tsim ntau yam nws yuav qhia ceev nrooj yaig, socket burning thiab kem breakage.
Q:Dab tsi kam rau siab yuav tsum tau tuav rau?
A: Kev kam rau siab tau teev nyob rau hauv kev yuav khoom kos duab thiab tshuaj xyuas cov ntaub ntawv, feem ntau yog ib qho tsis zoo me me ntawm nominal txoj kab uas hla yog li cov electrode hla lub ru tsev chaw nres nkoj thiab lub clamp.