我国硼工业关键技术的碳足迹分析

为分析我国硼工业对全球气候变化的影响,寻求节能减排的途径,采用德国GaBi 4.4生命周期评价软件对硼工业的关键技术进行了碳足迹的评价与分析.研究结果表明:在碳碱法生产硼砂工艺中,以硼精粉为原料产生的总碳足迹最大,以富硼渣为原料产生的总碳足迹最小,利用富硼渣生产硼砂既可以节约硼资源,又降低了环境影响;在硼酸生产工艺中,硼铁矿盐析法产生的总碳足迹最大,硼镁矿浮选分离法产生的总碳足迹最小,两步法产生的直接碳足迹最小,但总碳足迹则不占优势;降低能源消耗量,尤其是煤的消耗量对降低整个研究系统的碳足迹至关重要.

Carbon Footprint Analysis for Key Technology of Chinese Boron Industry

In order to analyze the environmental impact of global climate change resulting from Chinese boron industry, look for the way to economize energy and decrease pollution emission, carbon footprint resulting from pivotal technology was evaluated with the software of GaBi 4.4. The results showed that the borax production with boron concentrate brings the maximum total carbon footprint and the minimum is brought by the technology with boron-rich slag. Boron-rich slag is a good material to produce borax which can not only save boron resources but also reduce the environmental impact. Of all the boracic acid production technology, the salting out technology with paigeite ore brings the maximum total carbon footprint and the minimum is brought by the floatation technology with szaibelyite. Direct carbon footprint brought by two steps technology is least, but total carbon footprint is more. Reducing energy consumption especially coal is a good method to reduce the carbon footprint of the whole industry system.