1500kg Electrical Pool Type Aluminum Melting And Holding Furnace Aluminum Smelting Equipment

Electrical Pool Type Holding Furnace for Aluminum Smelting

1.Application

The electrical pool type holding furnace is mainly used for heat

preservation of nonferrous metals solution.

Structural Introduction

The pool type holding furnace consists of the following three parts:

furnace body, heating elements and electrical control system. The

upper part of the electrical control box is control circuit. The lower

part is power circuit.

The furnace body is comprised of charging hole, holding chamber,

discharging hole and furnace cover. The charging hole, discharging hole

and holding chamber are casted as a whole by 84ACX castable which is

produced by Allied Mineral Products. (compressive strength is 140MPA

when temperature reaches 110℃. The line rate is 0.1%) This kind of

castable has the advantage of aluminum non-stick, high strength, easy

clean and long service life. The furnace cover adopts refractory fiber

cotton with Janpnese brand which has good heat preservation performance

and easy maintenance.

The electrical control system adopts PID control with the intelligent

temperature controller, and the power regulator. The temperature

control accuracy is ±3℃. The holding furnace for die casting also

has the over-temperature alarm.

Power supply prepared by the buyer:

Power supply: 3-phase 5-wire , 380V±10%, 50Hz±3 Hz;

Control power: 220V±10%,50Hz±3 Hz.

2.Technical Parameters

3.Heating system and electrical control system

3.1.Heating System

a)heating components—silicon carbide rod (6 pieces in total)

Control system: temperature controller (imported from Taiwan, 2 pieces),

electronic power regulator, contactor, relay.

Temperature sensing component: thermal coupling (2 pieces together,

1 for measuring the hearth atmosphere temperature and another for

measuring the molten aluminum temperature)

3.2.Electrical control system (PID control)

The thyristors are the main controlling component of the electrical control

system. The output current is controlled through the change of the

conduction angle of the thyristor. The electric aluminum holding furnace

employs the advanced phase control and firing circuit to control the conduction

angle of the thyristor. The temperature controller has various protection

functions. When the aluminum smelting furnace temperature rises over the

upper limit or the current is abnormal due to faults, the controller can

automatically stop pulse output, and stop power supply.

3.3. main technical parameters

a) working voltage: 380V 3 phases 50Hz;

b) control method: manual potentiometer regulation or automatic

control signal of 0-5VDC;

c) soft start-up function: moves started after 0.5 second;

d) Temperature control accuracy: ±5℃( under standard working conditions)

3.4.main electrical components

a) control cabinet, 1 piece;

b) temperature controller, Taiwan origin, 2 pieces (one controller

with PID regulation).

c) power regulator, 1 set;

d) low voltage electrical components, 1 set;

e) thermal coupling, 2 pieces (the piece measuring the molten

aluminum temperature is sheathed in a protection casing pipe);