Brown corundum Furnace
Corundum smelting furnace overview:
Corundum is generally made of industrial alumina or bauxite after
sintering or electric melting. When industrial alumina is
electromelted, white corundum is obtained, and its Al2O3 content is
greater than 98.5%; When bauxite is used as raw material, common
corundum is obtained, and its Al2O3 content is 91~93%, and after
treatment, the Al2O3 content is greater than 97%. When iron filings
are added, brown corundum can be produced; When zircon or zirconia
is added, zircon corundum is obtained. That is to say, corundum can
be divided into sintered corundum and fused corundum two major
varieties, and can be divided into white corundum, brown corundum,
zirconium corundum, black corundum, chrome corundum and so on.
White corundum can also be divided into ordinary fused corundum and
low porosity or dense fused corundum. In amorphous refractories,
the use of white corundum and brown corundum as refractory
aggregate and powder has been more and more applied, and remarkable
results have been achieved.
Brown corundum melting furnace process overview:
Equipment Overview:
1. The furnace cover is fixed, and the furnace cover is provided
with 3 feeding ports, observation devices, dust removal ports and
electrode holes. ;
2. Each phase uses a large section of internal water-cooled cable,
compensator, wall through copper pipe, copper pipe conductive cross
arm (trolley lift type) to form a space triangle arrangement of
energy-saving short network. Three-phase impedance unbalance ≤4.5%.
Water-cooled cable and water-cooled copper pipe section current
carrying ≤4.5A/m㎡; The current carrying capacity of the copper bar
section of the short network is less than 1.5A/m㎡.
3. Electrode lifting automatic regulator adopts full hydraulic
proportional valve control automatic lifting regulator. The
electrode lifting can be operated automatically and manually, and
the electrode response time is less than 0.25S. Arc current setting
range: 25%-130%, electrode response time: 0.15S.
4. The furnace body tilting, electrode lifting, electrode holding
brake adopts hydraulic transmission, integrated block hydraulic
valve;
5. The electrode holder adopts copper forging structure, stainless
steel belt type disc spring clamping, hydraulic release, reliable
use, long life.
6. The electrode automatic lifting regulator is controlled by
Siemens S7PLC.
7. The electric furnace transformer adopts low-loss energy-saving
transformer, which can be overloaded by 20% for a long time,
on-load electric voltage regulation, strong oil-water cooling,
transformer primary voltage 10KV, secondary voltage 170-380V.
On-load electric voltage regulation, top out line mode, and
equipped with perfect oil temperature and gas protection device.
8. The high voltage electrical control adopts KYN28 new switchgear,
equipped with a special microcomputer protection device for
electric furnace transformation, with a complete range of voltage,
current, power and electrical measurement and relay protection,
zinc oxide arrester to absorb operating overvoltage, and a simple
rectifying power supply for switching.
9. The cooling water system has pressure and water temperature
monitoring, sound and light alarm. In order to prevent power
failure, the user needs to set up a high water tank.
10. Electric furnace parameters to implement industrial computer
monitoring and management. Advanced and perfect upper computer, the
central centralized control system to achieve the integration of
the production line, intelligent, control, warning, protection
system, to ensure the safe and reliable operation of the production
line, can provide the possibility for the user's data management
network (can be combined with the network communication module,
through the mobile phone remote monitoring of the electric furnace
operating status).
