Emission reduction measures in the production process?
Use variable frequency motor drive equipment to reduce energy consumption by 20%-30%. Welding smoke is treated by bag dust removal + activated carbon adsorption. The recycling rate of waste flux is over 90%. Photovoltaic panels are installed on the top of the factory to supply part of the electricity. A factory reduces carbon emissions by 12,000 tons per year through a waste heat recovery system.
Recycling technology for waste pipes?
Mechanical disassembly method cuts pipes into scrap steel for remelting, with a recovery rate of over 98%. The entire section of pipe can be used for building foundation pit support or temporary bridges. High-pressure water jet technology can completely strip the lining coating. Rare earth permanent magnet separators separate pipe sections of different materials. Germany has established a "digital passport" traceability platform for pipeline materials.
The development status of green coating materials?
The VOCs content of water-based epoxy coatings is less than 50g/L. Polyaspartic acid ester coatings cure quickly and have strong weather resistance. Nano-SiO₂ modified coatings achieve self-cleaning function. Degradable bio-based polyester coatings are in the experimental stage. The Chinese Academy of Sciences has developed a photocatalytic coating that can decompose attached oil stains.
What is the progress of low-carbon steel research and development?
Hydrogen metallurgy direct reduction iron technology reduces carbon emissions by 80%. High scrap ratio electric arc furnace smelting (scrap steel ratio ≥ 70%). Microalloying design reduces the amount of scarce elements such as molybdenum and niobium. ArcelorMittal launches XCarb® zero-carbon steel test product. Baowu Group has developed LCA steel with a full life cycle carbon emission of ≤1.2tCO2/t.
What is the application case of life cycle assessment (LCA)?
A project assessment shows that the carbon emission of spiral welded pipes is 15% lower than that of straight seam pipes (due to high transportation efficiency). In the 50-year life cycle of DN1200 pipelines, the maintenance phase accounts for 60% of carbon emissions. Digital twin technology can dynamically update LCA data. Statoil requires suppliers to provide EPD (Environmental Product Declaration). Carbon footprint may become a mandatory indicator for bidding in the future.
