30 Tons AC Electric Arc Furnace Introduction
The 30-ton AC electric arc furnace steel making is used to melt scrap steel to produce steel.
Electrical energy is used to melt scrap steel. An arc forms between the charged material and the electrode.
Eccentric bottom tapping (EBT)，25000 KVA Electric Transformer.
The EAF furnace cover adopts a frame-type tubular water-cooled furnace cover.
30 Tons AC Electric Arc Furnace Introduction
The 30-ton AC electric arc furnace is used to melt scrap steel to produce steel. Electrical energy is used to melt scrap steel.
An arc forms between the charged material and the electrode.
The heat generated by the arc melts the scrap.
The electric arc furnace consists of three parts (lower furnace body, upper furnace body and furnace roof) and can be tilted hydraulically.
The lower vessel, upper vessel and top interior are lined with refractory material.
The outside and top of the vessel usually consist of a water-cooled steel structure.
Main Application of 30 Ton AC Electric Arc Furnace
Used to smelt ordinary steel
high-quality carbon steel
various alloy steels and stainless steel
30 Ton AC Electric Arc Furnace Equipment Features
1. The overall structure of the 30-ton AC electric arc steel furnace adopts a large platform structure with an elevated layout, a furnace cover that can be rotated to load the top, and a detachable furnace shell; EBT tapping and tapping spout are two ways of tapping.
2. Scrap steel basket is used for charging;
3. Copper-steel composite conductive cross arm and large-section water-cooled cable;
4. The upper furnace shell of the electric furnace adopts a tubular water-cooled furnace wall;
5. The furnace cover adopts a frame-type tubular water-cooled furnace cover;
6. The furnace structure adopts an integral tilting platform;
7. Eccentric bottom tapping (EBT) + tapping spout tapping; Steel is tapped from the tapping car;
8. Slag pot for tapping;
9. Computer and PLC control, the electrode regulator adopts constant impedance adjustment technology);
10. Mobile hood dust removal;
11. The self-consumable furnace door carbon oxygen gun blowing technology is adopted to shorten the smelting cycle and reduce power consumption.
30 Ton AC Electric Arc Furnace Equipment Composition
AC Electric Arc Furnace consist of furnace body, large-section water-cooled cable, furnace tilting mechanism, electrode lifting mechanism, furnace cover lifting and rotating mechanism, water cooling system, hydraulic system, high-voltage system, electric furnace transformer, low-voltage system automatic control system, etc.
Sanrui EAF Technical Advantages
Low Power Consumption and Cost Reduction
The high current system of the electric arc steel furnace uses pure copper as the conductive medium, and the entire loop resistance is small. Taking full account of the skin effect when current passes through conductors, the cross arm adopts a box-shaped copper-steel composite plate structure, which can effectively reduce resistance and heat generation. Reasonable high-current system layout makes various current impedances smaller.
EAF Equipment Operation is More Stable and Smelting is Safer
The entire hydraulic drive is equipped with an accumulator, which stabilizes the pressure of the hydraulic system and makes the electric arc furnace steel making equipment run more stably. At the same time, in emergencies such as power outages, the equipment can continue to perform unfinished operations, which improves the safety of smelting.
Electrode Consumption Reduced
The anti-electrode breakage system can effectively reduce the chance of electrode breakage during the smelting process. In particular, avoiding electrode breakage during the scrap melting process is equivalent to saving an entire furnace of molten steel and reducing economic losses.
The Equipment is Simple to Operate and Easy to Use
Electrical automation control adopts human-machine interface, which simulates the form of real electric arc furnace steel making furnace body and is easy to operate. Batching, loading, smelting and tapping can all be operated on the computer.
High Arc Starting Efficiency
Using a new type of electrode adjustment system, the electric arc furnace electrode lifting control breaks the previous single signal return control technology and adopts multi-signal collection and PLC signal comparison technology to increase the electrode arc starting speed and avoid long-term effects on the electric arc steel furnace during the arc starting process. Upper level power grid system.
Diversification of Dust Removal Systems
The dust removal systems we are equipped with are diversified and can be equipped with different forms of dust removal equipment according to the environmental protection requirements of different countries.
30 Ton AC Electric Arc Furnace Main Equipment Parameter
| SN | Name | Unit | Content | Remark |
| 1.1 | Electric arc furnace steel making capacity | |||
| Nominal capacity | t | 30 | ||
| Average steel output | t | 35 | (Retained steel ~ 5t full scrap steel smelting) | |
| 1.2 | Steel output method | EBT | ||
| 1.3 | Furnace body device | |||
| Inner diameter of furnace shell | mm | ～Ф4300 | ||
| Diameter of molten pool | mm | ～Ф3400 | ||
| Thickness of refractory material at furnace bottom | mm | ～600 | ||
| EBT steel outlet diameter | mm | Ф120 | ||
| Furnace shell replacement method | The upper and lower furnace bodies can be suspended separately - movable furnace base | |||
| 1.4 | Furnace cover | |||
| Maximum lifting height of furnace cover | mm | ～500 | ||
| Electrode center circle diameter | mm | ～Ф1000 | ||
| Furnace cover lifting time | S | 25 | ||
| Furnace cover opening angle | (°) | ～66 | ||
| Opening speed | (°)/S | ≤3.5 | ||
| Transmission control method | PLC-Hydraulic | |||
| Furnace cover water cooling method | Tube water cooling | |||
| 1.5 | Electric furnace transformer | |||
| Rated capacity | kVA | 25000 | Overload up to 20% | |
| Primary voltage | kV | 35 | ||
| Secondary voltage | V | 436-224 | A total of 13 levels (tentative) | |
| Secondary rated current | A | 41240 | ||
| Voltage regulation method | On-load electric pressure regulation | |||
| Inlet and outlet line method | Top-in, inner-sealed, side-out |
Scope of 30 Ton AC Electric Arc Furnace Supply
Furnace body: furnace shell, furnace door mechanism, tapping spout mechanism
Furnace roof: tubular water-cooled furnace roof, refractory center roof (this is a drawing produced by the seller, made by the buyer)
Furnace croof lifting and rotating mechanism: furnace cover lifting mechanism (cylinder, chain, gear, etc.), (Γ frame), rotating mechanism, rotating locking mechanism
Tilting mechanism: arc-shaped frame, base, tilting hydraulic cylinder
Electrode cross arm and lifting mechanism: electrode support arm, electrode clamping device, lifting mechanism
Short network: stainless steel bracket, compensator, water-cooled cable, stainless steel bracket, water-cooled conductive copper tube
Cooling water system: water inlet distributor, return water tank, pressure gauge, thermometer, valve
Hydraulic system: motor, pump, filter, tank, control valve, accumulator
High-voltage power supply system: isolation switch, voltage transformer, vacuum circuit breaker, current transformer, lightning arrester, etc.
Electric furnace transformer
Low voltage electrical system
Low-voltage power cabinet, PLC cabinet, main operating console, furnace front operating console, hydraulic operating box, control sensor, limit switch, etc.
Automation control system: Siemens PLC
Electric Arc Furnace Steelmaking Process
01
The basic process of electric arc furnace steelmaking 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 electric arc furnace steelmaking 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
During the oxidation period, measures such as early dephosphorization, intensive oxygen use, powder spraying to create foam slag, and rapid temperature rise can reduce the amount of oxidative decarburization from 0.3% in traditional processes to 0.1% to 0.15%, thus shortening the oxidation period by 50%. above.
04
In the reduction period, diffusion deoxidation in the traditional process is mainly replaced by precipitation deoxidation, and diffusion deoxidation is supplemented. White slag or carbide slag needs to be produced. Each furnace smelting takes 3 to 4 hours, and the power consumption is as high as 600 to 700kWh/t. Not only can the expected refining effect be achieved, but the steel quality is guaranteed and the reduction time can be shortened by more than 60%.
05
While improving the quality of molten steel, the process improvement has also increased productivity by about 20%, reduced power consumption by 10% to 15%, and reduced electrode consumption by about 8%, achieving considerable economic benefits.
Sanrui Electric Arc Furnace Technology Optimization
After optimizing electric arc furnace steel making technology, Sanrui has achieved the best balance between raw materials, scrap preheating, energy conservation and environmental protection, smelting process control, automation control, smelting cycle and production capacity. The electric arc furnace inputs electric energy into the electric arc furnace steelmaking through graphite electrodes, and uses the arc between the electrode end and the charge as the heat source for steelmaking.
The electric arc furnace uses electric energy as the heat source and can adjust the atmosphere in the furnace, which is extremely beneficial for melting steel types that contain more easily oxidized elements. Utilize high-temperature flue gas from electric furnaces to preheat raw materials through technology and equipment to achieve high efficiency, energy saving, environmental protection and high yield.
With the improvement of electric arc furnace equipment and smelting technology, and the development of the electric power industry, the cost of electric furnace steel continues to decrease. Nowadays, electric furnaces are not only used to produce alloy steel, but also to produce ordinary carbon steel and iron ore concentrate pellets.
Services Provided by Sanrui
1. Sanrui can provide foundation layout and layout drawings as an AC electric arc furnace manufacturer
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 electric arc furnace cost & price and excellent quality
5. Low investment, high production efficiency and high rate of return
6. Smelting equipment has stable performance and safe production
7. Steelmaking electric 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 an AC electric arc furnace manufacturer with rich experience in designing, manufacturing, installing, debugging and commissioning steelmaking process equipment, Sanrui provides engineering consulting, R&D, design, equipment supply, system integration and software compilation, construction, installation, debugging, project management, technical services and training, production guidance, operation and maintenance, spare parts supply and other comprehensive engineering and technical services.
Send us your project details to get an electric arc furnace cost commercial solution. Our engineering team will design an 30 ton AC electric arc furnace steelmaking production line solution according to your needs.
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Customized metallurgical machinery and equipment range: Electric Arc Furnace, Submerged Arc Furnace, LF Refining Furnace, Vacuum Furnace, Induction Furnace, Dust Remove System, Water Treatment Equipment, etc. Providing the most advanced equipment integration services, metallurgical equipment can be customized according to different needs of customers, and production capacity can be adjusted according to customer requirements.
The 5 ton electric arc furnace for steel-making is a special purpose equipment that makes ordinary steel, quality carbon steel, alloy steel and non-corrosive steel with electric arc as heat source and scrap steel (iron) as raw material.
DC electric arc furnace is an electric arc furnace supplying electric energy with DC power supply. There is only one electrode on the top of the DC arc furnace, which is the negative electrode, and the bottom electrode is the positive electrode.
50 Ton Ultra-high Power Electric Arc Furnace
The 50-ton ultra-high power electric arc furnace (50TUPH EAF) adopts ultra-high power, high impedance technology, bottom tapping technology (ETB), furnace wall oxygen oil burner and furnace door carbon-oxygen gun technology.
Electric Arc Furnace Steel Making
Electric arc furnace steel making is a steelmaking method that uses the thermal effect of electric arc to heat the charge for melting.
30 Ton electric arc furnace is used for steelmaking short process smelting, using 100% scrap steel or scrap steel + molten iron (pig iron), or scrap steel + sponge iron (DRI) as raw materials for steelmaking.
15-ton electric arc furnace is used for the short-process steelmaking process, using 100% scrap steel or scrap steel + molten iron (pig iron), or scrap steel + sponge iron (DRI) as raw materials for steelmaking.
Ultra-high Power Electric Arc Furnace
Ultra-high power electric arc furnace mainly changes the arc characteristics of high voltage and long arc to the arc characteristics of high current, low voltage and short arc
Electric arc furnaces are used to melt scrap steel for steel production. Electrical energy is used to melt scrap steel. An arc forms between the charged material and the electrode. The heat generated by the arc melts the scrap.
Our Completed Projects
Sanrui metallurgy furnace equipment integration services are submerged arc furnaces and electric arc furnaces. Sanrui metallurgy furnaces are manufactured using cutting-edge technology to ensure an efficient, high-quality melting process. These furnaces are capable of melting a variety of materials, including steel, iron and alloys, ferroalloys (such as ferrotungsten, high carbon ferromanganese, high carbon ferrosilicon, high carbon ferrochromium, ferronickel alloys) and industrial silicon, calcium carbide, corundum, yellow phosphorus, etc. with precise temperature control and minimal energy consumption. By using Sanrui metallurgy furnace equipments, metallurgical companies can increase productivity and reduce production costs, ultimately increasing profitability.
Sanrui is well experience in design, manufacturing, installation, commissioning of steelmaking furnace process equipment. Send us your project details inquiry and our team of engineers will design a metallurgical furnace equipment system solution from A to Z based on your needs.
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