乳化燃烧减少钢材氧化烧损的研究

DECELERATION OF SCALE FORMATION ON STEEL DURING HEATING BY EMULSIFIED OIL

本文提出采用乳化燃烧降低氧化烧损,并从理论和实践两个方面证实其可行性。燃用SMH重油乳化添加剂及配套乳化装置制成的油包水型乳化重油可使钢材的氧化烧损率降低。很据本试验在上海高压容器厂和上钢三厂中板分厂测定的结果,氧化烧损分别相对下降为20％以上和15％左右。Mossbauer谱仪分析结果表明:燃用该乳化重油氧化皮中Fe_3O_4。含量明显增加,特别是内层氧化皮中Fe_3O_4含量更高。氧化烧损率降低的主要原因是生成了Fe_3O_4氧化保护膜及降低了过剩氧量。

According to both theoretical analysis and practice, the deceleration of scale formation on the steel during direct fire heating was adopted by injection of the water-in-oil emulsified fuel oil, replacing the conventional heavy oil, with an emulsifying equipment. To put into productive practice, the relative decelerating rate after data from the Shanghai Pressure Vessel Plant and the Shanghai Steel Works No. 3 is about 20 and 15% respectively. Mossbauer spectra showed that the Fe_3O_4 content is much abundant in the scale, especially in its inside layer during firing the emulsified fuel oil, The reason, why the scale formation might be recelerated, seems to be a protective Fe_3O_4 film is formed and an excess of oxygen is reduced.