Complete equipment for refining furnace of chromium slag
Technological process of production:
Description of the process:
The main raw materials of the special refining furnace are
calcium-free chromium slag, calcium-vanadium slag, carbonite and
silica, which are calculated according to the ingredients of raw
materials on site, accurately weighed by an electronic balance
according to a certain ratio, and reasonably batted and dried, and
then sent to the top silo of the 13.5-meter platform of the
electric furnace by a inclined bridge loading trolley. Through the
circular distribution system at the top of the electric furnace, it
is put into the top bin, and through the feeding pipe in the
furnace, it is continuously sent to the submerged arc melting. The
slag and hot metal are discharged through the iron outlet, injected
into the hot metal and slag bag, and some of the slag is removed by
water quenching method. After the oven is finished, the hot metal
package car is opened to the casting stage, after sedation, the
scum is lifted to the water quenching slag chute for slag
discharge, the remaining hot metal is poured into the ingot mold,
the alloy is slightly cooled and pry up, after natural cooling and
crushing, the crane is lifted to the iron box, and the cooling is
put into the storage.
The flue gas of the electric furnace enters the bag dust collector,
is treated, discharged after reaching the discharge standard, and
the dust dust is returned to the raw material workshop.
Structure type of equipment:
1) The use of fully water-cooled horizontal jacking hydraulic
cylinder pressure ring, so that the copper tile force uniform,
balanced and uniform conduction;
2) The use of new water-cooled cable technology and forged copper
shingles, water-cooled cable and copper pipe connection selection
of button-type connection, which can reduce the contact resistance;
3) The new short network structure of one to one between the
transformer outlet and the copper tile makes the equipment more
advanced and the operation rate is high;
4) The short-net design uses the three-phase electrode triangular
connection method, which has good short-net compensation, low
impedance, low three-phase unbalance coefficient, high power factor
and significant power-saving effect;
5) Adopt full hydraulic lock, PLC control, to achieve voltage
discharge, improve the operation rate of the electrode system;
6) The large current carrying conductor is made of non-magnetic
steel, which can greatly reduce the power loss;
7) The insulation system of the entire equipment is at least twice
insulated;
8) According to the smelting characteristics of special refining
furnaces, the automatic electrode regulator adopts the more mature
PLC+ proportional valve automatic regulation technology on steel
furnaces at present;
9) The furnace structure adopts a unique furnace form, which
greatly improves its reliability (lining life), and the power
saving effect is obvious.
Special refining furnaces using the new technology and equipment
are currently at the leading level in China.
Instruction of the equipment:
The main equipment adopts the semi-closed fixed furnace type with
low smoke hood. The design electrode adopts hydraulic cylinder
lifting device, short network adopts water-cooled cable,
water-cooled copper pipe, forged copper tile and so on.
The main equipment is composed of: furnace body, smoke hood and
flue, electrode part (including holder, electrode lifting device,
electrode pressure release device, hydraulic mechanical lock,
pressure ring device), eye opening machine system, hydraulic
system, etc.;
Auxiliary mechanical equipment: inclined bridge loading system,
factory circulating water cooling system, iron system, casting
equipment, etc.
Electrical equipment includes: high voltage power supply system,
electric furnace transformer, electric furnace control system.
