高纯镁砂生产生命周期评价

高纯镁砂是众多镁质耐火材料中需求量最大、用途最广的产品之一,但是近年来高纯镁砂生产企业仍面临能源消耗大、污染排放多、污染控制治理难等问题。采用生命周期评价法对高纯镁砂生产“从摇篮到大门”的环境影响进行分析,将整个生产过程分为6个阶段,并选取了12种关键环境影响类型,通过建立物质投入及排放清单,基于eBalance软件进行建模与计算。结果表明:高纯镁砂生产的总环境影响为4.23×10-12,其中GWP是高纯镁砂生产过程中最大的环境影响贡献类型。轻烧阶段、重烧阶段的环境影响贡献最大;其次为细磨阶段、开采阶段、压球阶段;而运输阶段的环境影响贡献很小。     

Conversion of the refractory ammonia and acetic acid in catalytic wet air oxidation of animal byproducts

Wet air oxidation (WAO) and catalytic wet air oxidation (CWAO) of slaughtered animal byproducts (ABPs) were investigated. Two step experiment was carried out consisting of a non-catalysedWAO run followed by a CWAO run at 170–275°C , 20 MPa, and reaction time 180 min. TheWAO (1st step) of sample (5 g/L total organic carbon (TOC)) yielded (82.0 4)% TOC removal and (78.4 13.2)% conversion of the initial organic-N into NH4 +-N. Four metal catalysts (Pd, Pt, Rh, Ru) supported over alumina have been tested in catalytic WAO (2nd step) at elevated pH to enhance ammonia conversion and organic matter removal, particularly acetic acid. It was found that the catalysts Ru, Pt, and Rh had significant e ects on the TOC removal (95.1%, 99.5% and 96.7%, respectively) and on the abatement of ammonia (93.4%, 96.7% and 96.3%, respectively) with high nitrogen selectivity. The catalyst Pd was found to have the less activity while Pt had the best performance. The X-Ray di raction analysis showed that the support of catalyst was not stable under the experimental conditions since it reacted with phosphate present in solution. Nitrite and nitrate ions were monitored during the oxidation reaction and it was concluded that CWAO of ammonia in real waste treatment framework was in good agreement with the results obtained from the literature for ideal solutions of ammonia.     

李红霞 实现几代人的梦想

洛阳牡丹公园对面,有个一眼望去非常干净、满是绿色的院落,一个从外观看很现代的建筑,非常庄重与安静,这里就是有着50多年历史的中钢集团洛阳耐火材料研究院,2010年新筹建的先进耐火材料国家重点实验室也坐落在这里,历史的积淀,都隐含在高耸白杨和粗壮梧桐的枝叶间。     

标准动态

GB/T 2423.22等四项国家标准起草工作组会议召开9月28日全国电工电子产品环境条件与环境试验标准化技术委员会气候试验分技术委员会(SAC/TC8/SC2)在广州召开气候环境试验标准起草工作组会议,讨论并确定GB/T 2423.22《电工电子产品环境试验第2部分:试验方法试验N:温度变化》,GB/T 2423.34《电工电子     

Radiation induced decomposition of a refractory cefathiamidine intermediate

Diisopropylthiourea（DPT）, an intermediate of a widely used cephalosporin, has been found to be one of the most refractory components in cephalosporin synthesis wastewater.This compound cannot be completely removed by conventional biological processes due to its antimicrobial property. Ionizing radiation has been applied in the decomposition of refractory pollutants in recent years and has proved effective. Therefore, the decomposition of DPT by γ-irradiation was studied. The compound was irradiated at the dose of 150–2000 Gy before a change of concentration and UV absorption of the solutions was detected.Furthermore, the decomposition kinetics and radiation yield（G-value） of DPT was investigated. The results of radiation experiments on DPT-containing aqueous showed that the DPT can be effectively degraded by γ-radiation. DPT concentration decreased with increasing absorbed doses. G-values of radiolytic decomposition for DPT（20 mg/L） were 1.04 and 0.47 for absorbed doses of 150 and 2000 Gy, respectively. The initial concentration and p H of the solutions affected the degradation. As the concentration of substrate increased,the decomposition was reduced. The decrease of removal rate and radiation efficacy under alkaline condition suggested that lower p H values benefit the γ-induced degradation. UV absorption from 190 to 250 nm decreased after radiation while that from 250 to 300 nm increased, indicating the formation of by-products.     

国家耐火材料质检中心通过国际实验室能力验证

国家耐火材料质量监督检验中心2009年参加了中实国金国际实验室能力验证中心组织的能力验证,计划名称为NILPT-0154高炉渣中SiO2、CaO、MgO、Al2O3含量的测定（国际比对）、NITPT-0159碳化硅中SiC、游离碳含量的测定。