The replacement of natural gas-fired steel furnaces with resistance band-fired steel furnaces is an inevitable historical trend

The important role of resistance electric heating materials in the national carbon peak, carbon neutrality and green development

ealizing carbon peak and carbon neutrality is China's commitment to the world, its responsibility and commitment to building a community with a shared future for mankind, and a major strategic decision to achieve sustainable development.The important role of resistance electric heating materials in the national carbon peak, carbon neutrality and green development.

The extensive use of coal, oil, and gas as fuels in industrial manufacturing and chemical production processes is the main factor causing pollution. Therefore, the rapid development of reducing emissions and pollution in the industrial manufacturing field requires the application of green electricity (solar energy, wind power, hydropower, etc.) to replace coal, oil, and gas, which has a significant responsibility and is imperative, urgent, and an inevitable choice in history.

Beijing Shougang Gitane New Materials Co., Ltd. has been engaged in the research and production of high-end electric heating materials for 70 years. The "SPARK" brand resistance electric heating alloy material is a symbol of China's most famous and high-quality products. Among them, the ultra-high temperature resistance electric heating alloy materials HRE, SGHYZ, and SGHT with patented intellectual property rights have a service temperature of 1350-1450 ℃, which not only represents the highest technological level of resistance electric heating materials in China, but also reaches the international advanced technological level and replaces similar imported products. It has played a huge role in the national photovoltaic power generation field, thermal storage and energy storage field, sponge titanium production and titanium manufacturing field, industrial manufacturing heat treatment field, low-carbon development of coal to electricity, gas to electricity and other production fields, and has been widely applied.

Ⅰ. It is the social responsibility of enterprises to use resistance electric heating materials to replace gas, oil, and coal for heating and reduce pollution emissions.

Reducing pollution and reducing gas emissions is an important guarantee for the country to achieve carbon peak by 2030. Therefore, reducing or eliminating pollution is not only a social responsibility that enterprises must bear, but also related to their own survival and development, and has been included in the legal management of air pollution, namely the "Air Pollution Prevention and Control Law of the People's Republic of China". Gas, oil, coal, and steel fired heat treatment furnaces all emit a large amount of nitrogen oxides and sulfide gases. To meet national standards for emissions, a significant amount of funding and long-term maintenance costs must be invested, which will be a huge burden on enterprises. The steel burning furnace made of high-quality electric resistance materials will completely solve the problem of emissions not meeting standards for you.

Ⅱ. The advantages of using resistance electric heating materials to manufacture steel furnaces instead of gas steel furnaces in the forging industry are as follows:

 (1) Electric furnaces have lower manufacturing and maintenance costs compared to gas furnaces, occupy less land, are easy to maintain, and have less impact on production.

（2) Compared to gas, electricity has lower energy consumption and lower costs.

 
After testing and comparing the forged steel parts of a certain company under two fire conditions, the average consumption of natural gas per ton of steel is 80m3, and the natural gas cost is 3.31 yuan/m3, with a total cost of 80x3.31=264.8 yuan/ton. The electricity cost for using an electric furnace for 320kWh is 0.6 yuan/kWh, and the cost is 320x0.6=192 yuan/ton. Forging each ton of steel can reduce costs by 264.8-192=72.8 yuan.

 
From the policy analysis of national green and low-carbon development, the supply of gas will be controlled, and gas prices will also be raised, which will bring increasing costs and pressure to enterprises. The policy of developing green power industry, reducing electricity prices, and encouraging enterprises to use electricity has become a long-term plan for national strategic development.

（3）Electric furnace heating reduces oxide skin loss by more than 50% compared to gas furnace heating.

For the same workpiece, the thickness of the oxide layer caused by the gas furnace is generally around 4-5mm. If the steel is burned at a rate of about 45kg per ton after two fires, the loss rate is 4.5%.

  
Switching to an electric furnace to burn steel oxide scale at around 2mm results in a loss of about 20kg per ton of steel, with a loss rate of only 2%. The yield rate alone has increased by over 2.5%.

  
If calculated at the lowest price of 6000 yuan/ton for low-alloy steel, the benefit per ton of steel is 6x (45-20)=150 yuan, and the total cost per ton of steel can be reduced by 150+72.8=222.8 yuan/ton. The more expensive the materials and the higher the production capacity, the greater the benefits for the enterprise, and cumulatively, it will bring considerable economic benefits to the enterprise.

（4） Due to the fact that electric heating involves radiative heat transfer and is a reducing atmosphere. Gas heating, on the other hand, is conducted heat transfer and belongs to an oxidizing atmosphere. So the center crack of electrically heated forgings can be significantly reduced.

 
（5） Changing from gas fired steel furnaces to electric fired steel furnaces will achieve the ultimate goal of zero emissions and low-carbon environmental protection.

Ⅲ. What type of electric heating material is suitable for your application.

(1) Resistive electric heating materials can be divided into two categories based on commonly used varieties: nickel based and iron-based products.

 
(2)  Divided into four categories based on shape: silk (0.01-12.0mm); Belt (0.8-3.0 * 6-40); Great, and the four major categories of management.

 
(3) Divided into five categories based on usage temperature:

 
1. Low temperature (≤ 300 ℃ steel grade 0Cr13Al4/1Cr13Al4 0Cr19Al3);

 
2. Medium temperature (steel grades 0Cr25Al5 0Cr20Al6 0Cr21Al6Nb and NiCr);

3. High temperature (800 ℃ -1200 ℃ steel grade 0Cr21Al6Nb HRE SGHYZ SGHT class);

 
4. Ultra high temperature (1200 ℃ -1450 ℃ HRE SGHYZ SGHT);

 
5. The application can use special ultra-high temperature non-metallic electric heating materials above 1500 ℃.

 
(4)  Users choose materials based on temperature requirements, furnace atmosphere, production frequency and actual operation, and comprehensive factors such as the material and size of the heated workpiece.

(5) Based on the selection of materials, according to different furnace types and application heat fields, our company's professional technology and software system accurately calculate the width to thickness ratio, surface load, electric heating element zoning layout, and strict and precise construction and installation of the strip to achieve stable usage effects.

  
Shougang Gitane New Materials Co., Ltd. has the highest quality resistance electric heating alloy materials in China; We have a first-class professional R&D team for resistance electric heating materials in China; There is a professional electric heating element design and production team and an electric furnace design team led by senior engineers. We are willing to provide you with dedicated service, assist in the development of your enterprise, and let "SPARK" electric heating materials accompany you to create the future and glory!