Technical performance parameters of 250kg silver melting electric furnace

First, the use of equipment:

Silver melting  

Second, equipment technical performance parameters: (important)

1. Application condition

The maximum temperature of molten silver: 1250-1300 °C.

2. Power performance

Rated power: 150KW;

Frequency: 3000Hz;

Power input terminal: 575 volts / 3 phase / 50 Hz (provider provides transformer);

Incoming line power fluctuation range: +10% - -5%;

Power supply KVA capacity: 165KVA

Conversion efficiency : ≥95%;

Power factor: ≥95% at any output power.

3. Silver melting medium frequency electric furnace body

Electric furnace type: coreless induction furnace;

Rated capacity: 250Kg (silver)

Maximum capacity: 275 Kg (silver)

Inclined form: hydraulic tilting.

Third, the specific requirements of silver melting medium frequency electric furnace

1. Overall functional requirements of the equipment: (important)

l The output power of the variable frequency power supply can be adjusted arbitrarily within the rated power range. Regardless of the output power value, the power factor of the system is always not less than 0.95.

l The variable frequency power supply has a flat rate automatic tracking function, which can always maintain the best match between the power supply and the furnace. The operator does not need to switch the capacitor connections, thus avoiding operational factors that affect the efficiency of the system.

l The variable frequency power supply is a voltage feedback series type, which adopts uncontrolled rectification. When working, the rectified thyristor is fully conductive, and the high harmonic component is small, which has little impact on the power grid.

l The variable frequency power supply is a voltage feedback series type, and its startup success rate is 100% regardless of the cold furnace or the hot furnace.

l Variable frequency power supply has perfect functions of melting control management, automatic fault diagnosis and automatic furnace lining sintering. And has a complete melting process control function and a complete monitoring, alarm and fault self-diagnosis function. With a sound and light alarm system, it will alarm the following conditions:

- the frequency converter cabinet is turned on;

- the capacitor is damaged;

- the temperature of each cooling water of the power supply is too high;

- the power supply cooling water pressure is too low;

- the furnace cooling water temperature is too high;

- the furnace cooling water pressure is too low;

- the furnace selection/isolation switch is faulty;

- There is no DC output in the rectifier part of the variable frequency power supply;

- Ground/leakage detection alarm.

l The induction coil is made of thick-walled cold extrusion oxygen-free copper tube and electrostatic powder spraying process. Low loss, high mechanical strength and good insulation performance.

l Induction melting/insulation system uses DC injection grounding/leakage protection device.

l In the case where the molten metal of the leaking furnace contacts the induction coil, the operator will not receive an electric shock even if the metal tool is in contact with the molten metal in the furnace.

l The ground leakage condition can still be detected while the variable frequency power supply is stopped.

2, equipment color: (please provide color requirements and samples or color coding)

After the bidder has won the bid, the potential bidder will agree with the owner when signing the contract.

3. Spare parts requirements:

Provide a list of major consumables, including name, specification model, usage period, reference price and other information.

4, silver melting medium frequency electric furnace acceptance criteria:

    The equipment is manufactured in Party B and accepted before delivery: (Before the equipment leaves the factory, the equipment must be empty and trial run. The manufacturer must provide the factory inspection certificate and inspection record of the equipment.) The acceptance is notified to the buyer for confirmation and then shipped.

After the installation and commissioning is completed, the equipment is officially accepted at the Party A factory:

After the installation of the equipment is completed, Party B proposes that Party A can trial production.

Party A conducts trial production, and after one week of equipment trial production, the acceptance conditions can be accepted before formal acceptance can be carried out.

1) The equipment can be operated automatically, the operation is stable and reliable, no abnormal sound, and there is no fault in continuous operation for one week.

2) The wiring inside the electric control cabinet is neat, the line number is complete, and the color is not lost.

3) The surface of the equipment is painted flat, uniform thickness, no impurities, and the color conforms to the swatch.

4) All technical materials of the equipment are fully prepared.

5) The surface of the welded part of the equipment is flat without welding defects, and the surface is polished.

6) The spare parts for each equipment are fully prepared and have been delivered to Party A.

7) No design defects.

8) The equipment can be continuously produced for more than 24 hours, the overall equipment is beautiful and generous, and the components of the equipment must not have leakage, water leakage or oil leakage.

9) During the trial operation of the equipment, no major components are damaged (except for human reasons). Important components include: solenoid valves, motors, oil motors, oil pumps, cylinders, PLCs and computers.

10) Products produced to meet quality requirements.

11) During the trial production period, Party B must send people to track production and deal with equipment problems.