China OEM China Graphite Electrodes Producer - HP Graphite Electrode for Steel Making – MORKIN manufacturers and suppliers

OEM China Graphite Electrodes Producer - HP Graphite Electrode for Steel Making – MORKIN

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OEM China Graphite Electrodes Producer - HP Graphite Electrode for Steel Making – MORKIN Detail:

The Introduction of HP Graphite Electrode

High power graphite electrode is produced by low-sulfur content petroleum coke (or needle coke) as raw materials and coal asphalt as binder through calcination, crushing, batching, kneading, molding, baking, impregnation, rebaking, graphitization and machining. Its physical and mechanical properties are higher than regular power graphite electrode, such as low resistivity and large current density.

The Application of HP Graphite Electrode

(1) For steel smelting in electric arc furnace/ladle furnace

(2) HP Graphite electrode is mainly used in Electric arc furnace for steel making. When graphite electrode is working in EAF, the current will be introduced by graphite electrode into the furnace, and there will be heat source which is generated by electric arc between electrode end and furnace charge for smelting.

(3)For corundum smelting in electric furnace

(4)Used for processing special-shaped graphite products
The blank of graphite electrode is also used to process various special-shaped graphite prod and graphite crucible,etc..

The Production Processes of Graphite Electrode

The Chemical and Physical Indexes of HP Graphite Electrode

Item		Unit	HP
			φ200-φ700mm
Resistivity	Electrode	μΩm	5.8-6.6
	Nipple		3.5-4.0
Modulus of Rupture	Electrode	Mpa	10.0-13.0
	Nipple		20.0-23.0
Young’s Modulus	Electrode	GPa	8.0-12.0
	Nipple		14.0-16.0
Bulk Density	Electrode	g/cm3	1.64-1.68
	Nipple		1.75-1.80
CTE (100-600℃)	Electrode	10-6/℃	1.6-1.9
	Nipple		1.1-1.4
Ash		%	0.3

The Current Carrying Capacity of Graphite Electrode

Nominal Diameter		RP		HP		UHP
Millimeter	Inch	Current Carrying Capacity	Current Density	Current Carrying Capacity	Current Density	Current Carrying Capacity	Current Density
mm	inch	A	A/cm²	A	A/cm²	A	A/cm²
75	3’’	1000-1400	22-31
100	4’’	1500-2400	19-30
130	5’’	2200-3400	17-26
150	6’’	3000-4500	16-25
200	8’’	5000-6900	15-21	5500-6900	18-25
250	10’’	7000-10000	14-20	6500-10000	18-25	8100-12200	20-30
300	12’’	10000-13000	14-18	13000-17400	17-24	15000-22000	20-30
350	14’’	13500-18000	14-18	17400-24000	17-24	20000-30000	20-30
400	16’’	18000-23500	14-18	21000-31000	16-24	25000-40000	19-30
450	18’’	22000-27000	13-17	25000-40000	15-24	32000-45000	19-27
500	20’’	25000-32000	13-16	30000-48000	15-24	38000-55000	18-27
550	22’’	28000-34000	12-14	34000-53000	14-22	45000-65000	18-27
600	24’’	30000-36000	11-13	38000-58000	13-21	50000-75000	18-26
650	26’’	32000-39000	10-12	41000-65000	12-20	60000-85000	18-25
700	28’’	34000-42000	9.0-11	45000-72000	12-19	70000-120000	18-30

Dimension of 4TPI Nipples and Socket

Nominal Diameter		Nipple Type	Sizes of Nipple (mm)				Sizes of Socket		Thread
mm	inch		D	L	d2	l	d1	H	mm
mm	inch		Deviation (-0.5-0)	Deviation (-1-0)	Deviation (-5-0)	l	Deviation (0-0.5)	Deviation (0-7)	mm
200	8’’	122T4N	122.24	177.80	80	＜7	115.92	94.90	6.35
250	10’’	152T4N	152.40	190.50	108.00		146.08	101.30
300	12’’	177T4N	177.80	215.90	129.20		171.48	114.00
350	14’’	203T4N	203.20	254.00	148.20		196.88	133.00
400	16’’	222T4N	222.25	304.80	158.80		215.93	158.40
400	16’’	222T4L	222.25	355.60	150.00		215.93	183.80
450	18’’	241T4N	241.30	304.80	177.90		234.98	158.40
450	18’’	241T4L	241.30	355.60	169.42		234.98	183.80
500	20’’	269T4N	269.88	355.60	198.00		263.56	183.80
500	20’’	269T4L	269.88	457.20	181.08		263.56	234.60
550	22’’	298T4N	298.45	355.60	226.58		292.13	183.80
550	22’’	298T4L	298.45	457.20	209.65		292.13	234.60
600	24’’	317T4N	317.5	355.60	245.63		311.18	183.80
600	24’’	317T4L	317.5	457.20	228.70		311.18	234.60
650	26’’	355T4N	355.60	457.20	266.79		349.28	234.60
650	26’’	355T4L	355.60	558.80	249.86		349.28	285.40
700	28’’	374T4N	374.65	457.20	285.84		368.33	234.60
700	28’’	374T4L	374.65	558.80	268.91		368.33	285.40
750	30’’	406T4N	406.4	584.20	296.42		400.08	298.10
750	30’’	406T4L	406.4	609.60	292.19		400.08	310.80
800	32’’	431T4N	431.8	635.00	313.36		425.48	325.50
800	32’’	431T4L	431.8	685.80	304.89		425.48	348.90

Dimension of 3TPI Nipples and Socket

Nominal Diameter		Nipple Type	Sizes of Nipple (mm)				Sizes of Socket		Thread
mm	inch		D	L	d2	l	d1	H	mm
mm	inch		Deviation (-0.5-0)	Deviation (-1-0)	Deviation (-5-0)	l	Deviation (0-0.5)	Deviation (0-7)	mm
250	10’’	155T3N	155.57	220.00	103.80	＜7	147.14	116.00	6.35
300	12’’	177T3N	177.16	270.90	116.90		168.73	141.50
350	14’’	215T3N	215.90	304.80	150.00		207.47	158.40
400	16’’	215T3L	215.90	304.80	150.00		207.47	158.40
400	16’’	241T3N	241.30	338.70	169.80		232.87	175.30
450	18’’	241T3L	241.30	338.70	169.80		232.87	175.30
450	18’’	273T3N	273.05	355.60	198.70		264.62	183.80
500	20’’	273T3L	273.05	355.60	198.70		264.62	183.80
500	20’’	298T3N	298.45	372.60	221.30		290.02	192.20
550	22’’	298T3N	298.45	372.60	221.30		290.02	192.20

HP (2)

3TPI Thread Detail

HP (3)

4TPI Thread Detail

HP (4)

Reference of Torque

Diameter	mm	250	300	350	400	450	500	550	600	650	700
Diameter	inch	10’’	12	14	16	18	20	22	24	26	28
Torque (N.m)		400-450	500-650	700-950	850-1150	1050-1400	1300-1700	1850-2400	2300-3000	3900-4300	4400-5200

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