| 分析裂解技术在砂型铸造空气污染控制中的应用研究 |
| 摘要点击 1475 全文点击 2224 投稿时间：2009-04-21 修订日期：2009-07-08 |
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| 中文关键词 分析裂解技术 砂型铸造 空气污染控制 挥发性有机物 危险性空气污染物 |
| 英文关键词 analytical pyrolysis green sand casting air pollution control volatile organic compound(VOC) hazardous air pollutant(HAP) |
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| 中文摘要 |
| 采用分析裂解技术模拟砂型铸造过程中原材料的热解过程，并采用GC-FID/MS等对分析裂解产生的挥发性有机物与危险性空气污染物进行了分析.通过与实际铸造过程中产生的空气污染物的对比发现，分析裂解与实际铸造过程中产生的空气污染物在种类与构成上都十分相似，主要由苯、甲苯和酚组成.此外，采用分析裂解技术比较不同原材料的空气污染物产生量，可以准确地预测使用不同原材料进行铸造生产时的空气污染物相对变化趋势.分析裂解与实际铸造的空气污染物检测结果均表明，与传统的酚醛树脂黏合剂相比，采用新型的无萘型酚醛树脂黏合剂进行铸造 |
| 英文摘要 |
| Analytic pyrolysis was conducted to simulate the heating conditions that the raw materials of green sand would experience during metal casting process.The volatile organic compound (VOC) and hazardous air pollutant (HAP) emissions from analytical pyrolysis were analyzed by gas chromatograph-flame ionization detector/mass spectrometry (GC-FID/MS).The emissions from analytical pyrolysis exhibited some similarity in the compositions and distributions with those from actual casting processes.The major compositions of the emissions included benzene,toluene and phenol.The relative changes of emission levels that were observed in analytical pyrolysis of the various raw materials also showed similar trends with those observed in actual metal casting processes.The emission testing results of both analytic pyrolysis and pre-production foundry have shown that compared to the conventional phenolic urethane binder,the new non-naphthalene phenolic urethane binder diminished more than 50% of polycyclic aromatic hydrocarbon emissions,and the protein-based binder diminished more than 90% of HAP emissions.The similar trends in the two sets of tests offered promise that analytical pyrolysis techniques could be a fast and accurate way to establish the emission inventories,and to evaluate the relative emission levels of various raw materials of casting industry.The results of analytical pyrolysis could provide useful guides for the foundries to select and develop proper clean raw materials for the casting production. |
