Closed Pig Iron Submerged Arc Furnace Introduction
The closed pig iron submerged arc furnace (submerged arc furnace iron making) is a non-blast furnace iron making method.
Under the premise of guaranteeing the power supply, it is easy to solve the problem by using the reducing agent required by the submerged arc furnace iron making.
Closed Pig Iron Submerged Arc Furnace Introduction
The closed pig iron melting furnace (submerged arc furnace iron making) is a non-blast furnace iron making method. Under the premise of guaranteeing the power supply, it is easy to solve the problem by using the reducing agent required by the submerged arc furnace iron making. For submerged arc furnace ironmaking, coke, semi-coke and coal can be used as reducing agent instead of coke.
Sanrui closed pig iron submerged arc furnace adopts new process and new equipment of hot charging, which can save energy, reduce consumption and achieve good benefits.
This electric pig iron furnace equipment is only the process scope of iron concentrate from the sintering machine to the submerged arc furnace for smelting pig iron.
Main Application of Closed Pig Iron Furnace
The enclosed pig iron furnace takes coke, semi-coke and coal as reducing agent instead of coke, and the iron concentrate
Sent out the reducing agent from the sintering machine
And then sent into the submerged arc furnace for smelting into pig iron.
Characteristics of Closed Pig Iron Furnace Equipment
1. The enclosed pig iron melting furnace is a fully-enclosed, full-hydraulic, fixed electric pig iron furnace, and the enclosed pig iron melting furnace adopts micro-positive pressure operation technology.
2. Two sets of iron and slag outlets are used, one for use and one for standby. Two molten iron ladle are set in front of each set of iron tapping and slag tapping.
3. The electric pig iron furnace electrode combined holder can improve the conductivity of the electrode.
4. Bellows non-magnetic stainless steel pressure ring technology is adopted.
5. Unique waterway design and advanced manufacturing process of water-cooled protective cover.
6. The electrode sealing guide device realizes the sealing between the electrode and the furnace cover, and the electrode position is fixed. The sealing guide sleeve adopts the water cooling structure. The insulation between the sealing guide sleeve and the furnace cover is good, and the electrode center circle diameter can be adjusted.
Closed Pig Iron Submerged Arc Furnace Equipment Composition
The closed pig iron submerged arc furnace is mainly composed of furnace body (shell, bottom I-steel and iron outlet, etc.), furnace lining (refractory material), furnace front exhaust system, furnace bottom air cooling device, closed furnace cover, chimney, copper pad electrode holder, secondary short network system, hydraulic system, water cooling system, furnace top feeding system, feeding system, single beam suspension crane, electric furnace transformer and reserved low-frequency power supply position, furnace front equipment, electrical equipment, instrument, DCS control system, etc.
Sanrui Closed Pig Iron Arc Furnace Technical Advantages
Closed pig iron submerged arc furnace is a fully-enclosed, full-hydraulic, fixed electric furnace with micro-positive pressure operation and automatic furnace pressure adjustment.
Optimize electric pig iron furnace short network (bus bar system) technology, guarantee three-phase balance and minimize impedance value.
The pig iron melting furnace cover is a fully water-cooled closed furnace cover, with a unique waterway design on the top, no water flow dead angle is formed inside, no steam blockage is generated during use, and the cooling effect is good. Collect and export gas, reduce heat loss and improve working conditions of smelting operation.
Fully automatic feeding, multipoint distribution in the furnace, continuous feeding and smelting, automatic matching and automatic adjustment of feeding speed and electrode input power.
Automatic regulation technology of electrode lifting realizes automatic smelting, power regulation, high electrical efficiency and low power consumption.
Furnace wall and bottom temperature automatic detection and alarm system to ensure safe production.
Simple and intuitive operation, very friendly human-computer interaction effect.
Low investment, quick effect and low energy consumption.
Extremely strong process and advanced software programming.
Main Technical Parameters of 36MVA Closed Pig Iron Submerged Arc Furnace
| Item | Parameter |
| Electrode diameter/mm | Ф1250 |
| Electrode center circle diameter/mm | Ф4250 |
| Furnace diameter/mm | Ф11500 |
| Furnace depth/mm | 3500 |
| Inner diameter of furnace shell mm | Ф13500 |
| Height of furnace shell mm | 6200 |
| Furnace cover height mm | 1500 |
| Electrode lifting stroke mm | 1800 |
| Electrode lifting speed m/min | 0.5 |
| Number of iron outlets | 2 |
| Electrode current density A/cm ² | 5.4 |
| Cooling water consumption t/h | Electric furnace 640, transformer 160) |
| Equipment operation rate | 99% |
| Number of daily iron output | Times (once every 90 minutes) |
| Average daily output t | four hundred and forty-two point four one |
| Output of two submerged arc furnaces in 45 minutes t | And 27.65-29.7, meeting the requirement of 27.5t steel making in 45 minutes. |
Scope of Closed Pig Iron Furnace Supply
Sanrui Electric Furnace is one of the submerged arc furnace pig iron manufacturers & suppliers. Sanrui can provide customized furnace accessories according to drawings supplied by clients.
Feed feed system: hopper, feed pipe
Furnace body: furnace body, furnace shell, furnace bottom support beam, furnace top ring, furnace lining
Closed water-cooled furnace cover: fully water-cooled closed furnace cover, furnace cover side plate and furnace door, electrode sealing device, chimney, smoke hood and smoke exhaust pipe at the exit
Short network (bus system): compensator, conductive copper bar, short network suspension system, collecting ring and support, cable, conductive plate
Electrode device: electrode holder, electrode shell, electrode clamping device, electrode pressure release device, electrode lifting device, electrode guide and distribution circle adjustment, steel platform
Burner: short network of the burner, guide rail and guide rod of the burner, body of the burner, graphite electrode and insulating material
Cooling water system: inlet distributor, return water collecting tank, cooling water pipe, return water pipe, pressure gauge, thermometer, valve
Hydraulic system: electrode clamping cylinder, friction ring clamping and releasing cylinder, electrode pressing and releasing cylinder, hydraulic pump station, motor, control valve, accumulator, external oil pipe
Electric pig iron furnace transformer
LV electrical system: LV electrical control, LV power supply cabinet, LV protection cabinet, electrode lifting console
Discharging system: Discharging pot, discharging truck
Closed Pig Iron Submerged Arc Furnace Smelting Process
01
The basic process of pig iron submerged arc furnace includes slag removal, metal charging, power supply, melting, oxidation, reduction refining and tapping. Depending on the characteristics of the type of steel being smelted, there are different operating methods. The smelting process mainly consists of three phases: melting, oxidation, and reduction.
02
With the continuous development of technology, the submerged arc furnace piog iron melting process has also undergone great changes. During the melting period, auxiliary energy is used to accelerate melting, such as injection of oil-oxygen, natural gas-oxygen or pulverized coal-oxygen. The melting time of each furnace is shortened by 15 ~20min, power consumption can be reduced by 50~60kWh/t;
03
Upon completion, plug the furnace hole, send the molten iron ladle to the pouring room, and pour the liquid iron into the continuous casting machine. The cooled pig iron is loaded into the iron bucket and sent to the finished product area by the flat car for subsequent treatment.
Sanrui Closed Pig Iron Furnace Technology Optimization
Pig iron submerged arc furnace is a fully-enclosed, full-hydraulic, fixed electric pig iron furnace with micro-positive pressure operation and automatic furnace pressure adjustment.
Optimize short network (bus system) technology, guarantee three-phase balance and minimize impedance value.
The pig iron melting furnace cover is a fully water-cooled closed furnace cover with a unique waterway design
Intelligent electrode automatic adjustment technology
Bellows non-magnetic stainless steel pressure ring technology is adopted
Copper tile copper bottom ring technology is adopted
Direct-cooled integrally forged copper bush
The electric pig iron furnace ombined holder can improve the conductivity of the electrode.
Services Provided by Sanrui
1. As one of the famous pig iron submerged arc furnace manufacturer & supplier in China, Sanrui can provide foundation layout and layout drawings
2. Sanrui will send engineers to your factory to install and debug the machine, providing trustworthy after-sales service.
3. Sanrui provides operation and maintenance personnel training, and the smelting equipment is easy to operate and maintain.
4. Competitive price and excellent quality
5. Low investment, high production efficiency and high rate of return
6. Pig iron smelting furnace equipment has stable performance and safe production
7. Closed pig iron submerged arc furnace can be customized according to different needs
8. Production capacity can be adjusted according to customer requirements
9. Environmentally friendly, low energy consumption
As one of the famous pig iron submerged arc furnace manufacturer & supplier in China, Sanrui provides engineering consulting, R&D, design, equipment supply, system integration and software development, construction, installation, commissioning, project management, technical services and training, production guidance, operation and maintenance, spare parts supply and other comprehensive engineering and technical services.
Send us your detailed project requirements, and our engineering team will design Closed Pig Iron Submerged Arc Furnace solution based on your needs.
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