大庆油库防火安全级别的确定

在大庆油库防火实践的基础上,总结出的一套评定油库防火安全级别的方法以及相应的防火安全对策细则。     

硫砷铜矿和辉锑矿在焙烧/熔炼温度下的氧化-挥发反应

熔炼/吹炼法生产铜时,铜精矿中的微量有害元素砷和锑会发生蒸发副反应。众所周知,当这些杂质元素以可观数量存在于铜精矿中时,环境被砷和锑污染的危险性显著增加,使最终的铜质量恶化。本文讨论了一项在500~1 100℃温度范围内从Cu_3AsS_4中挥发As和从Sb_2S_3中挥发Sb的研究结果。采用Cu_3AsS_4,纯Sb_2S_3及预制的Cu_3AsS_4-Sb_2S_3混合矿样,在N_2和空气可控气氛下进行研究。结果表明在氧化气氛下,Cu_3AsS_4中的As完全挥发,留下铜复合物CuO渣,辉锑矿部分以SbO_2形式蒸发,蒸发程度主要依赖于温度。在800℃和1 000℃时,辉锑矿的挥发程度分别达到45%和75%。混合硫砷铜矿-辉锑矿样品氧化-挥发时,在硫砷铜矿存在下,锑的挥发加强,加强的程度同样依赖于温度。在1 000℃,约99%的Sb_2S_3在5 min内迅速挥发。     

Preparation and performance research of Ce-TiO2/KL ball photocatalysts

The Ce-TiO2/KL （diatomite） ball photocatalyst was prepared and characterized based on the pretreated diatomite. The resuits showed that comparing with the crude diatomite, proper pretreatment could significantly improve its SiO2 purity and specific surface area. The surface of diatomite was clear with uniform pore structure and big pore size. With diatomite ball as carder, the supported Ce-TiO2/KL ball photocatalyst was prepared by sol-gel method. The photocatalytic performances of the supported Ce-TiO2/ KL ball and Ce-TiO2/KL powder photocatalysts under various preparation conditions were studied in view of photocatalytic degrada- tion rate of Rhodamine B （Rh B） solution. The degradation rate of the ball photocatalysts for Rh B reached 94.6% and could be reused for many times, which showed much better photocatalytic performance and stability than powder photocatalysts.     

大庆油库防火安全级别的确定及防火对策

大庆油田有大中型油库十余座,其中由日本引进的南一油库的10×10~4m~3储罐是我国目前容积最大的储罐。这些油库所储存的油品大都属于甲、乙类液体,具有火灾危险性大、发生火灾后损失大、政治影响大的特点;同时,其油库本身还兼有投资大、火灾情况下扑救难度大的特性。针对这些情况,结合大庆油库的实际,在防火设计、施工以及管理工作中,采取相应的对策,为搞好油库防火安全工作,提供可靠的依据。