一次性使用麻醉穿刺包的辐照灭菌研究

一次性使用麻醉穿刺包经＾６０Ｃｏγ射线辐照灭菌,供临床使用。几年的应用实践证明,γ射线１０ｋＧｙ剂量辐照,基本达到无菌要求,已累计使用了近１０万件、无一例感染。     

Effect of reduction rate and annealing temperature on texture evolution and magnetic properties of used non-oriented silicon steel

This paper discusses the method of improving the magnetic properties of used silicon steel by cold rolling and annealing process with used non-oriented silicon steel as the object. The texture evolution and magnetic domain structure are also investigated. Experimental results show that the magnetic domain can be transformed vastly compared with the used silicon steel when the specimens are prepared through the same cold rolling and annealing conditions. The length of the magnetic wall and the density of magnetic domain per unit area are boosted, and the magnetic domain refinement is exceedingly apparent. Under the same annealing condition (at 950 °C for 5 min), the γ-fiber is gradually decreased to 6.6 % and the {110} recrystallization texture is gradually enhanced with increased reduction from 28.3 % to 40 %. The intensity of the Goss texture reaches a maximum of 22.2. For the cold rolling reduction of 34.3 %, the γ-fiber gradually decrease to 13.8 % and the {110} recrystallization texture is gradually enhanced with increase in the annealing temperature from 800 °C to 950 °C. Moreover, the intensity of Goss texture reaches 14. The sample prepared through 40 % reduction and annealing at 950 °C for 5 min exhibited the most desirable magnetic properties. The magnetic induction B₅₀ value of the specimen is increased by 0.052 T, and the core loss P_1.5/50 is reduced by 0.478 W/kg compared with the initial specimen.     

精苯酸焦油渣综合利用研究

在用盐析-萃取工艺对焦化精苯废酸进行回收过程中,有少量的酸焦油渣产生。虽然废渣量不大,但若不能对其有效利用,必将影响"盐析-萃取"工艺的推广应用。通过对酸焦油渣的性质分析,并结合焦化生产特点,探讨了废渣的综合利用途径。该种废渣的性质类似于焦化中温沥青,可以作为型煤的粘结剂替代部分软沥青。     

废弃耐火材料再生利用研究进展

对废弃耐火材料的来源及其对环境的危害等进行了分析,通过国内外大量文献的对比研究,并结合我国实际,对废弃耐火材料的再生利用方向进行了探讨。