A die-cast product, from raw material procurement to production and processing to sales, involves varying degrees of carbon emissions throughout its lifecycle.
By accurately calculating a product’s carbon footprint, companies can identify high-carbon emission links in the production process and implement targeted energy-saving and emission-reduction measures, such as adopting more environmentally friendly production methods and using clean energy. This approach improves efficiency while reducing carbon emissions. Taking the aluminum die-casting industry as an example:
Identifying and Quantifying Carbon Sources in the Die-Casting Process
1. The smelting process accounts for over 60% of the system’s total energy consumption, and the carbon intensity of electrolytic aluminum and recycled aluminum differs significantly.
2. The energy consumption of the die-casting machine’s hydraulic system is positively correlated with the clamping force parameter, with power consumption for high-tonnage equipment reaching 800-1200 kWh.
3. VOCs are emitted by release agents, releasing approximately 1.2-1.8 kg of organic pollutants per ton of casting.
Carbon Emission Baseline Calculation Method
1. The carbon footprint of primary aluminum die-casting ranges from 12-18 kgCO₂e/kg, while recycled aluminum processes can reduce this to 4-7 kgCO₂e/kg.
2. The calculation boundary is calculated using the ISO 14064 standard, encompassing raw and auxiliary material transportation and solid waste disposal.
3. The unit energy consumption curves at different injection speeds exhibit a U-shaped distribution, indicating an optimal process window.
Low-carbon die-casting technology implementation path
1. Melting stage: Promote the combination of electromagnetic stirring and regenerative burner technology, increasing thermal efficiency by 25%.
2. Die-casting unit: Equipped with a servo drive system, achieving 40-50% energy savings compared to traditional hydraulic presses.
3. Waste heat utilization: Establish a cascaded mold cooling water recovery system, recovering 15% of total energy consumption.
Of course, all manufacturing industries serve the global market. In this global market economy, carbon emission standards are also a factor in determining a responsible company. Mulan Metal will continue to increase the proportion of clean energy, procure renewable energy, electrify equipment, use biomass fuels, optimize logistics, and source low-carbon raw materials. We will continue to develop new processes to better meet customer carbon emission requirements.
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