This equipment is a power-saving type product, which uses a half-bridge series inverter intermediate frequency power supply (voltage resonance). When the electric furnace is cold, hot, half-filled or filled, the half-bridge series inverter can output rated power with a constant power factor of 0.98. It has the characteristics of fast melting speed, low energy consumption and stable and reliable operation. The equipment consists of a series resonant intermediate frequency power supply and two coreless steel shell induction melting furnaces and auxiliary equipment required for the normal operation of the system.

A series resonant dual output power supply with two electric furnaces can work at the same time (commonly known as one to two), that is, the output power can be randomly distributed between the two furnace bodies, and the two furnace bodies can be simultaneously powered, one insulation , one smelt.

2, 12-pulse rectification inverter series 5T / 3500kw melting furnace main technical indicators

Melting furnace working mode:

1.1 One set of furnace body is smelted and the other set is spared. Power setting is 3500kw, melting time (5T molten iron to 1550 °C) ≤ 55 minutes / furnace

1.2 A set of furnace body melting, a furnace body insulation (refining), melting power of 3200kw insulation power ≤ 3 00KW / furnace. In this state, the melting time (5 T iron water to 1 5 5 0 ℃) ≤ 60 minutes.

1.3 The two furnace bodies are simultaneously smelted and produced.

A, comprehensive indicators
Serial number	project	Indicator requirements
1	Equipment form	Medium frequency melting furnace
2	Equipment use	Used for melting carbon steel, cast iron, aluminum, etc.
3	Rated Capacity	5T
4	Maximum capacity	5T + 1 0%
5	Operating temperature	15 5 0 °C
6	Smelting material	Cast steel, cast iron
7	Lower discharge mode	Hydraulic : hydraulic control
9	Working noise	<85 decibels
10	Furnace structure	Steel shell
12	Melting rate	5T /h
13	Release temperature	1 5 5 0 °C ±20 °C
14	Melting power consumption	≤ 55 0±5% kW.h/t cast steel
14	Melting power consumption	≤ 5 0 0±5% kW.h/t cast iron
15	Melting time	55 minutes / furnace
B. Electrical indicators :
Serial number	project	index
1	Power supply	3500kw / 6 phase 12 pulse 5T
2	Number of rectifiers	12 veins
3	Inverter	SCR series inverter
4	Rated frequency	250 Hz
5	Line voltage	660 V
6	IF voltage	45 00V -4800V
7	Start success rate	100%
8	Power factor	0.9 8
C, with cooling system parameters
Serial number	project	index
1	Closed loop cooling tower	ZXZ-N 320 T integrated layering tower two sets of 70T and 250T integrated layering
2	Cooling tower housing	Galvanized or 304 stainless steel
3	Fan supporting motor	5.5 KW X 2
4	Spray pump	4 KW
5	Main circulation pump	22kw
6	Cooler	304 cooler
C, furnace index
Serial number	project	Indicator requirements
1	Furnace shell structure	Steel shell
2	Furnace shell material	45 # steel
3	Thickened panel	20mm
4	Yoke material	Z11-0. 23
5	Yoke coverage	8 5%
6	Yoke clamping	Stainless steel 1Cr18Ni9
7	Yoke cooling method	Double water cooling
8	Sensor copper tube material	T2 pure copper 99.9
9	Inductor copper tube specifications	Wall thickness ≥ 7
10	Sensor turns	By design
11	Inductor insulation	3-way dipping paint, double-layer dressing, pressure resistance 8000V
	Sensor winding	Long and double winding, machine winding (not hand-wound)
	Sensor winding	Machine winding
	Induction ring inner diameter	1140mm
	Induction loop height	1550
12	waterway	8 in 8 out , water connection hose
13	Way out	Come out
14	Water cooling ring material	Copper tube
15	Furnace shell heat	<75 ° C (except the furnace bottom and the furnace cover)
1 6	insulation	The coil and the yoke are insulated by a double layer of mica board.
17	bolt	Ordinary carbon steel bolts are grade 8.8. Other bolts stainless steel
18	Water connection hose	Use non-flame retardant high insulation rubber tube
19	Water collector	Stainless steel
D. Furnace material
1	Refractory clay	GROUT 563A US-Tianjin Union Products

3 , series inverter IF power supply introduction:

Adopt series inverter frequency power supply 6 with pulse series inverter 12. Series III . Technical parameters required for rectifier transformer

model:	ZS11- 3500 KVA/10KV / 660v
Rated Capacity:	Se= 35000 kva
Primary voltage:	U1=10000V±5% 6- phase 12-pulse 50HZ
Primary current:	I1= 202 A
Secondary voltage:	U2= 380V
Secondary current:	I2= 1530A X 2
Pressure regulation method:	Three-speed manual non-excitation regulator
Connection group:	D/d. -yn11
Impedance voltage:	Z75o=6.5%
effectiveness:	≥ 97%