利用粉煤灰制作新型建筑材料

粉煤灰不仅占用大量耕地,而且严重污染环境。针对东营地区粉煤灰的产生现状,积极开发粉煤灰的废物利用。通过对粉煤灰生产空心砌块的原料配比和生产工艺实施的调查,结果表明,利用粉煤灰生产新型建筑材料是减少占地和建材工业征地的有效途径,能变废为宝、化害为利,达到保护环境的目的。     

超细聚苯乙烯微球粉体的燃爆特性研究

为研究超细聚苯乙烯微球粉体的燃爆特性,通过粉尘层最低着火温度测试装置、MIE-D1.2最小点火能测试装置、20 L球形爆炸测试装置,对其最低着火温度、最大爆炸压力、最小点火能量(MIE)等爆炸特性参数进行测定,探讨了加热温度、点火延滞时间、粉尘质量浓度、粉尘粒径对粉体燃爆特性的影响。结果表明:超细聚苯乙烯微球粉尘层在350℃左右时会发生无焰燃烧,且加热温度越高,粉体粒径越小,粉尘层发生着火时所需的时间越短;当粉体质量浓度为250 g/m3时,最大爆炸压力达到0.65 MPa,质量浓度为500 g/m3时,最大爆炸压力的上升速率达90 MPa/s以上;随点火延滞时间增加,最小点火能表现出先缓慢减小再急剧增大的规律;随粉尘质量浓度增加,最小点火能逐渐降低,当粉尘质量浓度超过500g/m3后逐渐趋于稳定。     

电缆表面粉尘自热行为数学模拟

建立了负载电缆表面粉尘自热过程的稳态传热数学模型,通过数值解讨论其自热行为。     

复合清污剂清除赤潮藻类和营养盐的技术研究

以粉煤灰为主要原料,配制成复合清污剂杀灭赤潮藻类和营养盐。通过实验室研究,当复合清污剂的投加量为1.0 g／ L时,对赤潮藻类有很好的杀灭效果。实验还研究了复合清污剂对水中营养盐的去除效果。并通过168 h的连续实验研究了 不同营养盐浓度的情况下藻类数量及营养盐浓度的变化情况。     

弥散铜镦挤成形过程的数值模拟

通过有限元计算机模拟系统DEFORM对弥散铜粉末体材料镦挤过程进行数值模拟 ,说明了弥散铜的变形特征和致密化过程。其结果与粉末体变形理论一致。通过数值模拟 ,可预测成形载荷和产品组织性能 ,可进行工艺参数的优化     

常温下粉碎废旧轮胎的研究

利用自行开发的研磨机对废旧轮胎进行常温粉碎实验 ,结果表明 :本装置完全适合常温下用废旧轮胎制取胶粉 ,通过改变操作参数可以得到不同粒度的胶粉。为胶粉的制造方法开辟了新的途径     

Uptake of copper ion by activated sludge and its bacterial community variation analyzed by 16S rDNA

The effect and uptake of copper ion on SBR(sequence batch reactor)biological treatment system was studied.special nutrient and powder activated carbon(PAC)additive were tested as uptake stimulation technique.Results showed that copper ion had higher effect on unacclimated activated sludge system than on acelimated one.The special nutrient adding could enhance the uptake of copper significantly,while PAC adding could improve the sludge settling and decrease the turbidity of effluent.The variation of bacterial community analyzed by 16S rDNA method showed the acclimation of copper could increase copper resistance species,and excess accumulation could cause some species diminish.It was confirmed that acclimation could improve the resistance and uptake ability of microorganism to heavy metal.     

粉末冶金高纯铬和铬合金溅射靶材烧结工艺研究

介绍了不同加工方式对铬靶烧结密度的影响。在机压过程中,采用双向压制,不添任何成型剂和脱氧剂。机压+真空烧结铬环靶材密度为78%～80%;冷等静压+真空烧结铬板靶材密度大于82%;而经轧制后,铬板靶材密度提高到90%～95%;铬合金靶材采用热压方式,其密度大于98%。通过优化烧结时间和烧结温度等工艺参数,铬环靶材的烧结成本大大降低。     

农作物秸秆综合利用新技术——工业化生产羧甲基纤维素

从农作物秸秆引起的污染问题着手 ,论述了农作物秸秆的各项综合利用技术 ;在实验室研究的基础上 ,提出了工业化生产羧甲基纤维素的综合利用技术 ,不仅可以解决农作物秸秆焚烧引起的污染问题 ,还可以创造可观的经济效益     

Major and trace elemental analysis in milk powder by inductively coupled plasma-optical emission spectrometry (ICP-OES) and instrumental neutron activation analysis (INAA)

Major and trace element in seven different kinds of milk powder were studied. The concentration of 24 elements were determined by ICP-OES method, from these elements 9 elements determined by INAA. The determination of trace element contents of foodstuffs, especially milk as daily drink for all peoples age which being a complex food has great importance. The elemental analysis of milk is important both as an indicator of environmental contamination and because milk is a significant pathway for toxic metal intake and a source of essential nutrients for humans. The major elements are Ca, K, Mg, Na, P and S. While trace element are B, Ba, Co, Cr, Cu, Fe, Li, Mn, Mo, Ni, Sb, Se,Sn, Sr, V, W and Zn.ICP-OES technique is shown to be a powerful tool for trace determinations in powder samples. This is shown by its use for analysis of aseries of the milk powders mentioned and comparative results of other direct technique such as instrumental neutron activation analysis. Analysis of both standard reference material A-Ⅱ milk powder and NBS Orchard leaves for quality accurance had been completed, and used for a relative method calculate. The importance of the major and trace elements to human health was discussed