500kg Gas Fired Pool Aluminum Holding Furnace Die Casting Process 660℃

Gas Fired Pool Aluminum Alloy Holding Furnace Die Casting Process

1. General Introduction

The gas fired pool type aluminum holding furnace is an aluminum

alloy liquid holding furnace which could recycle the heat of the fume

and saves energy consumption greatly.

The furnace for die casting process adopts the high quality burner

with a large flame radiation size and a high heat efficiency. The aluminum

liquid temperature is kept at an accuracy of ±5℃. The furnace inside

oxygen content is less than 5% which effective prevents generation of oxides.

The die casting holding furnace is designed with the special heat insulation

structure which could effectively reduce surface heat loss, reduce

environment temperature rise, and improve heat efficiency.

The electric aluminum holding furnace wall is lined with high alumina

refractory bricks

which have a service life of more than 3 years.

2. Technical Parameters

3. Furnace Structure

3.1 Furnace shell

The furnace shell is made of steel plate and sectional steel. The door edge is made

of cast iron material.

3.2 Furnace lining

The melting pool is built with high alumina bricks which have the features of high strength,

free aluminum-sticking, and long life. (compression strength: 140Mpa when temperature

is above 110℃; linear rate: only 0.1%). The heat insulation layer used is of Grade One

silicate aluminum fiber board.

3.3 Burning system:

The burning system is easy in operation, and has a long service life. The furnace has

the functions of automatic temperature control, automatic ignition, and flame detection.

When the gas fired aluminum holding furnace reaches the set temperature, the burner

stops working. When the furnace temperature is lower than the set lower temperature

limit, the burner enters the burner port and works automatically. The burner ignites

automatically with a flame detection device. When the pool type aluminum holding

furnace is ready to work, the user should first turn on the air blower to purge the hearth.

The burner ignites automatically after purging finished and works with a small flame.

The flame detection rod detects the flame, and the burner will work with a big flame.

The flame detection rod monitors the burning status of the burner all the time.

The furnace burning system is also set with safety measures. If there are situations

such as incomplete burning or flame-out, the control system cuts off main burner

and ignition burner to stop the fuel supply. There is also the interlock device between

the gas pipeline and air pipeline. If there is any abnormal burning situation, the

interlock device cuts off the fuel supply. The liquid aluminum temperature is controlled

through PID regulation. The fan inverter automatically adjusts the fan rotation speed

so as to regulate the gas flow. The die casting holding furnace has set the

atmosphere temperature upper limit value.

3.4 discharging hole

The aluminum liquid is discharged with the help of manual operation. During the liquid

discharging process, there should be no leak problem.

3.5 Temperature control

The holding furnace for aluminum is set with control functions such as the automatic

flame switches, the over temperature alarm, the flame-out protection, etc.

Aluminum liquid temperature control

Hearth temperature control

Safety device and automatic control system

When the aluminum smelting furnace starts to work, the user should first switch on

the power supply and turn on the blower to purge the furnace. Set the furnace

temperature and open the solenoid valve of the gas pipeline. The burner ignites

when the natural gas enters the hearth.

3.6 hydraulic tilting system

The furnace body is designed with tilting function. It is mainly comprised of the

hydraulic cylinder, control valves, and pipeline.