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RP Graphite Electrode

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RP Graphite Electrodes

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RP Graphite electrodes

Graphite electrode is one of the most important metallurgical products, mainly used as conductive material in electric arc furnace metallurgy production. RP graphite electrodes are mainly used for ordinary power electric furnaces such as steelmaking, silicon smelting, and yellow phosphorus smelting.

Advantage

● High current carrying capacity.
● Good resistance to breakage
● High resistance to oxidation and thermal shock
● High mechanical strength, low electrical resistance
● High machining accuracy, good surface finishing

Specification

Item		Unit	RP Nominal Diameter(mm)			RP Nominal Diameter(mm)
			YB/T4090 Industry Standard			Enterprise Standard
			75-300	350-450	500-800	75-300	350-450	500-800
LSR≤	Electrode	μΩ.M	10.0	10.5	10.5	8	8	8
LSR≤	Nipple	μΩ.M	8.0	8.0	8.0	5.5	5.5	5.5
Flexural Strength ≥	Electrode	Mpa	8.0	7.0	6.5	8.4	7.5	7
Flexural Strength ≥	Nipple	Mpa	15.0	15.0	15.0	16	16	16
Elastic Modulus ≤	Electrode	Gpa	9.3	9.3	9.3	8	8	8
Elastic Modulus ≤	Nipple	Gpa	14.0	14.0	14.0	12	12	12
Bulk Density ≥	Electrode	g/cm³	1.53	1.53	1.5	1.6	1.6	1.6
Bulk Density ≥	Nipple	g/cm³	1.70	1.70	1.7	1.75	1.75	1.75
CTE ≤	Electrode	10-6/ ℃	2.9	2.9	2.9	2.8	2.8	2.8
CTE ≤	Nipple	10-6/ ℃	2.8	2.8	2.8	2.7	2.7	2.7
Ash ≤		%	0.5	0.5	0.5	0.2	0.2	0.2

Allowed Current Load

Nominal Dia	Nominal Dia（mm)	Allowable current (A)	Current density(A/cm3)
in	mm	AC	AC
3	75	1000-1400	22-31
4	100	1500-2400	19-30
6	150	3000-4500	16-25
8	200	5000-6900	15-21
10	250	7000-10000	14-20
12	300	10000-13000	14-18
14	350	13500-18000	14-18
16	400	18000-23500	14-18
18	450	22000-27000	13-17
20	500	25000-32000	13-16
22	550	28000-34000	12-14
24	600	30000-36000	11-13
26	650	32000-39000	10-12
28	700	34000-42000	9-11

Package

The graphite electrode is packed in wooden crates, and the nipples are packed in wooden cases or pre-set in the electrodes. Electrodes would be covered with polythene sheet to protect the same from dust and moisture, and fasten with steel strips, which is good looking and firm. Proper and safe seaworthy packing, easy for forklift handling. Necessary measures would be provided to avoid possible damages to nipple threads-such as protective foam and rubber caps.

Nominal Diameter		Pallet	Electrode Packing		Electrode Preset Nipple Packing
Nominal Diameter		Pallet	Appr N.W.	Dimension	Appr N.W.	Dimension
mm	inch	pcs	kg	mm	kg	mm
200X1600	8X63	9	750	1700X1070X480	770	1800X1070X480
200X1700	8X67	9	800	1800X1070X480	820	1900X1070X480
250X1700	10X67	3	425	1800X820X350	438	1910X820X350
250X1800	10X71	3	450	1900X820X350	465	2010X820X350
300X1800	12X71	3	630	1900X970X400	650	2100X970X400
350X1800	14X71	3	860	1900X1120X450	885	2100X1120X450
400X1800	16X71	3	1120	1900X1270X500	1165	2100X1280X500
400X2100	16X83	3	1300	2200x1270x500	1345	2400X1280X500
450X1800	18X71	2	950	1900x970x550	990	2100X970X550
450X2100	18X83	2	1100	2200x970x550	1140	2400X970X550
500X1800	20X71	2	1200	1900X1070X600	1255	2150X1070X600
500X2100	20X83	2	1400	2200X1070X600	1455	2450X1070X600
550X2100	22X83	2	1690	2200X1170X650	1760	2450X1170X650
550X2400	22X95	2	1940	2500X1170X650	2010	2750X1170X650
600X2100	24X83	2	2000	2200X1270X500	2080	2450X1270X700
600X2400	24X95	2	2300	2500X1270X700	2380	2750X1270X700