DC Electric Arc Furnace Introduction
DC electric arc furnace is an electric arc furnace supplying electric energy with DC power supply. Like AC arc furnace, it also uses the electric arc generated between the electrode and furnace burden (or molten pool) to generate heat, so as to achieve the purpose of smelting.
DC Electric Arc Furnace Introduction
DC electric arc furnace is an electric arc furnace supplying electric energy with DC power supply. Like AC arc furnace, it also uses the electric arc generated between the electrode and furnace burden (or molten pool) to generate heat, so as to achieve the purpose of smelting.
The structural differences between DC arc furnace and AC arc furnace are as follows:
Three-phase AC arc furnaces are equipped with three electrodes that can move up and down, while DC electric furnaces are only equipped with one electrode that can move up and down on the top of the furnace, and the other electrode is fixed on the bottom of the furnace.
DC electric arc furnaces require DC power supply, so compared with three-phase AC arc furnaces, DC arc furnaces have more rectifying equipment that converts three-phase AC power into DC power.
Main Application of DC Electric Arc Furnace
Used for smelting ordinary steel
high-quality carbon steel
various alloy steel and stainless steel
DC Electric Arc Furnace Equipment Features
(1) The arc is stable and centralized, the molten pool is well stirred, the temperature in the furnace is evenly distributed, and the production efficiency can be increased by 10%;
(2) Small fluctuation of current and voltage, reduced impact on power grid, balanced three-phase power supply, high power factor, power saving of more than 5%;
(3) Less electrode loss and 50% less electrode consumption per ton of steel than AC arc furnace.
DC Electric Arc Furnace Equipment Composition
DC electric arc furnace is composed of furnace body, short network, 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 automation control system, etc.
Sanrui DC EAF Technical Advantages
Low Power Consumption and Cost Reduction
The high current system of the DC electric arc 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 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 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 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.
DC Electric Arc Furnace Parameters
| Type | Rated capacity | Max capacity | Furnace Shell inner diameter ( MM) | Electrode diameter (MM) | Transformer capacity (KVA) |
| (T) | ( T) | ||||
| EAF-5T | 5 | 10 | 3200 | 300 | 2500-4300 |
| EAF-10T | 10 | 18 | 3600 | 350 | 5500-8000 |
| EAF-15T | 15 | 24 | 3800 | 350 | 8000-12500 |
| EAF-20T | 20 | 30 | 4000 | 400 | 9000-12500 |
| EAF-25T | 25 | 35 | 4200 | 400 | 12500 |
| EAF-30T | 30 | 45 | 4400 | 400 | 12500-25000 |
| EAF-40T | 40 | 55 | 4600 | 450 | 16000-30000 |
| EAF-45T | 45 | 65 | 4800 | 450 | 16000-40000 |
| EAF-60T | 60 | 85 | 5400 | 500 | 25000-60000 |
| EAF-80T | 80 | 100 | 6100 | 500 | 30000-80000 |
| EAF-100 | 100 | 120 | 6400 | 550 | 40000-80000 |
Scope of DC Electric Arc Furnace Supply
Sanrui Electric Furnace, as a Chinese DC electric arc furnace manufacturer and supplier, Sanrui can provide customized DC electric furnaces ranging from 3 tons mini DC electric furnaces to 100 tons DC electric furnaces and their accessories. Some products can be customized according to drawings.
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
DC Electric Arc Furnace Steelmaking Process
01
The basic process of DC 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
The smelting process flow is as follows:
Furnace repair → feeding (first basket) – power-on – oxygen and natural gas for combustion support → power-off feeding (second basket) → power-on – oxygen and natural gas for combustion support – component analysis → temperature measurement → slag flow – temperature measurement and component analysis – certain oxygen – power-off tapping (open EBT tapping hole) → plug EBT tapping hole → furnace repair.
Sanrui DC Electric Arc Furnace Technology Optimization
Sanrui optimized the DC arc furnace technology to achieve the optimal balance between raw materials, scrap preheating, energy conservation and environmental protection, smelting process control, automation control, smelting cycle and capacity. The electric arc furnace inputs electric energy to the electric arc steelmaking furnace through the graphite electrode, and takes the electric arc between the electrode end and the furnace burden as the heat source for steelmaking.
Electric energy is taken as the heat source of electric arc furnace, which can regulate the atmosphere in the furnace, which is very beneficial for smelting steel with more easily oxidizable elements. High-temperature flue gas from electric furnace is used to preheat raw materials through technology and equipment, so as to achieve high efficiency, energy conservation, environmental protection and high yield.
With the improvement of electric arc furnace equipment and smelting technology, the development of electric power industry, the cost of electric furnace steel is continuously reduced. Now, electric furnace is not only used to produce alloy steel, but also used to produce common carbon steel and iron concentrate pellets.
Services Provided by Sanrui
1. Sanrui can provide foundation layout and layout drawings as an DC electric arc furnace manufacturer and supplier
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. 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 DC 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 commercial and technical price offer solution. Our engineering team will design an DC electric arc furnace steelmaking production line solution according to your needs.
Related Products
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.
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.
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.
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.
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
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.
30 Ton AC Electric Arc Furnace
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.
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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