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煤粉是铸造车间潮模造型应用最广泛、最普遍的铸件防粘砂材料,它有来源广、成本低、防粘砂性能较好,以及能防夹砂、防皮下气孔等优点。但是煤粉也有污染环境、恶化劳动条件、影响人体健康等不可克服的缺点。有人对煤粉进行过分析,发现煤粉燃烧后,可产生6％的二氧化硫,0.3～0.9％的二氧化氮,0.2％的一氧化碳等物质。另外煤粉燃烧后还能产生10％左右的灰分积累在型砂中,使型砂性能变坏。所以有人
Pulverized coal is the most widely used and popular casting anti-sticking sand material in casting workshop. It has the advantages of wide source, low cost, good performance of anti-sticking sand, anti-sandproof and anti-subcutaneous pores. However, coal also pollutes the environment, aggravating working conditions, affecting human health and other insurmountable shortcomings. Someone analyzed the pulverized coal and found that pulverized coal could produce 6% sulfur dioxide, 0.3-0.9% nitrogen dioxide, 0.2% carbon monoxide and other substances. In addition the pulverized coal combustion can produce about 10% of the ash accumulated in the sand, the sand performance deterioration. So someone