The principle of constant power sum and parameter configuration of aluminum shell melting furnace_Energy saving induction heating equipment manufacturers

The aluminum shell melting iron furnace can realize simultaneous melting, and can also be smelted in one molten iron furnace . The other molten iron furnace can control the required temperature for casting or heat preservation, or can be smelted and shut down for another one.

Works of aluminum cupola

The operation mode adopts aluminum shell melting iron furnace , and the aluminum shell is a set of rectifying power source to drive two sets of inverter devices to operate. It can also be operated by any set of inverter devices separately, and can be supplied to A furnace or B furnace, double power supply aluminum shell function, especially For small and medium production runs high-volume continuous casting, high-power electric Renyiyitai melting operation, the other furnace can heat or cold feed preheat, arbitrarily assigned power demand, using two sets of sum frequency electric power constant ,

That is, total power P total power = PA + PB

The two electric furnaces are continuously alternately melted and insulated for simultaneous operation, so that the power supply can always be operated at full power, thereby increasing the melting productivity of the electric furnace.

When the series inverter power supply is working, the rectification always works under the condition of full conduction. Changing the output power of the inverter circuit is realized by controlling the inverter trigger pulse frequency. And the load current is sinusoidal, so the series inverter power supply will not have high harmonics and seriously pollute the power grid, and the power factor is high. Parallel inverter can not realize the automatic power regulation operation of aluminum shell , because the parallel inverter power supply can only be realized by adjusting the output voltage of the rectifier bridge. When the parallel inverter rectifier bridge works at low voltage, the rectification conduction angle is very small. The power factor of the device will be very low.

And the parallel inverter load current is a square wave, which will seriously pollute the power grid. If the power is adjusted by adjusting the inverter back pressure angle, the power adjustment range is very narrow, so the parallel inverter power supply cannot realize the operation of the aluminum shell .

1 t equipment consisting of aluminum cupola
Serial number	name	Model (specification)	Quantity	Remarks
1	Drawing information	Electronic version	3 sets	Equipment and supporting facilities
2	IF power cabinet	1200kw	1 set	With graphic display and temperature detection system, leakage alarm device, main circuit air switch, filter cabinet, rectifier cabinet, copper busbar in the cabinet, rectification and inverter components, etc.
3	Compensation capacitor cabinet	1200kw	1 set
4	Furnace body	GW1-600	2 sets	Steel shell furnace body, yoke, induction coil, water-cooled coil, etc.
5	Hydraulic station	Double machine double pump	1 set	Oil storage tanks, various valves and dual motors and oil pumps, etc.
6	Incubator console		1 set	Operator console housing and multi-channel manual valve
7	Leakage alarm device		2 sets
8	Water cooled cable		2 sets	The copper glue line and the hose joint are integrated.
9	Model		2
10	Connecting cable and copper bar	Power cabinet to capacitor cabinet	2 sets	Large-size double-cooled copper busbar for IF power output
11	Water dispenser		2 sets
12	Low voltage power box	Combination cabinet water system control	1 set	Control cabinet housing for waterway and oil system, internal shunt air switch, relay and thermal protection relay, display instrument and button, etc.
13	Metering device	Energy metering	1 set	Provide professional electrical energy measurement test certificate
14	Refractory clay		1 ton
15	Special furnace tool		1 set
16	Random tool		1 set	Maintenance and maintenance
17	Hot metal temperature measuring device		1 set	Provide professional temperature test certificate

1 ton aluminum shell melting iron furnace technical parameters
Serial number	project	unit	1t molten iron furnace parameters	0.75t molten iron furnace parameters
One	Electric furnace parameters
1	Rated Capacity	t	2×1	2×0.75
2	Maximum capacity	t	2×1.2	2×0.9
3	Inductive circle	Mm	700	620
4	Induction loop height	Mm	850	750
5	Rated operating temperature	°C	1700	1700
6	Transformer capacity	KVA	1400	1000
7	Transformer primary voltage	KV	6	6
8	Transformer secondary voltage	V	380	380
9	rated power	Kw	1200	800
10	Coil voltage	V	2000	1500
11	Rated operating frequency	Hz	500	500
12	Power conversion efficiency	%	97	97
13	Start success rate	%	100	100
14	Rectifier		6 pulses	6 pulses
15	Inverter		Series inverter	Series inverter
two	Comprehensive parameter
1	Equipment power factor		≥0.95	≥0.95
2	Melting rate (heating up to 1650 °C)	Min	80 min	80 min
3	Melting power consumption (temperature up to 1650 °C)	KW.h/t	<550	<580
4	Working noise	Db	≤75	≤75
three	Hydraulic system
1	Hydraulic station capacity	L	200	200
2	Working pressure	MPa	10	10
3	Hydraulic medium		46# anti-wear hydraulic oil	46# anti-wear hydraulic oil
four	Cooling water system
1	flow	M3/h	30	30
2	Water supply pressure	MPa	0.25~0.5	0.25~0.5
3	Inlet temperature	°C	5~35	5~35
4	Effluent temperature	°C	35～55	35～55
Fives	Leakage alarm device	2 sets		2 sets