金属静电粉末喷涂清洁生产途径探讨

清洁生产作为防治污染的最佳模式,是实现可持续发展和循环经济的必由之路.根据目前金属静电粉末喷涂典型生产工艺流程,分析其产污环节及污染物排放情况,并从原料、工艺和设备出发,探讨金属静电喷涂的清洁生产途径,以减少静电喷涂过程污染物排放对环境和生态的影响.     

超音速气流粉碎机生产超细粉体的安全问题探讨

超音速气流粉碎机是一种常用的生产超细粉体的设备。粉碎过程中涉及到许多安全问题，如粉尘的危害，噪音危害等。本文根据安全系统工程理论。从除尘器的选择、防护和管理措施的实施等方面对治理粉尘危害进行了探讨。     

钢板酸洗液回收Fe2O3粉制取高档永磁铁氧体预烧料的研究

以钢板酸洗废酸液回收的Fe2O3粉为主要原料，制备了永磁铁氧体预烧料及器件。研究了工艺制度如预烧温度、保温时间、摩尔比对预烧料磁学性能的影响等。制取的永磁铁氧体材料的磁性能达到Br=420mT，Hcb=215KA／m，（BH）max=32．4KJ／m^3。     

浅议烧结环保的治理对策

针对烧结行业环境污染严重的现状 ,对烧结粉尘、废气、污水等环保问题进行了系统分析 ,并提出了具体的治理对策。     

磁性活性污泥在废水处理中作用机理的探讨

文章主要讨论了磁性活性污泥在废水处理中的作用机理,指出了在活性污泥中加入磁性粉末后,使活性污泥的结构得到了改善,污泥的沉降性能、污泥中微生物活性及抗污染物冲击负荷能力都优于普通活性污泥,并且使污泥对废水中的有机物、N、P等营养物质及重金属的去除效率有较大的提高.这主要与磁性粉末有较大比表面积及表面的键态、电子态有关.     

关于如何拓宽胶粉应用的思考

为了拓宽胶粉的应用，主要从精细和超细胶粉的生产、胶粉的表面改性、再生胶粉的生产三个方面阐述了拓宽胶粉应用的途径和可行性。     

Photocatalytic degradation of PCP-Na with TiO2 photocatalysis loaded with platinum

Titanium dioxide(TiO2) samples of different crystal forms were prepared by hydrolysis tetrbutyl titanate in various water to alkoxide ratios and sintering the hydrolysis product at different temperatures.The photocatalysts coated on hollow glass beads and loaded with platinum varying from 0.2% to 2.4% by weight.The photocatalytic degradation rate of sodium pentachlorophenolate (PCP-Na) depends on the preparing conditions such as:sintering temperatures,water to alkoxide ratios(R),platinum content and the size.The proper conditions of preparation photocatalysts are as follows:the ratio of tiO2:sodium silicate:hollow glass beads:platinum is 10:5:20:0.15(w/w),R is 100,sintering temperature is 650℃,and the size of hollow glass is 0.5-1mm.Under these conditions,the ratio between acatase and rutile of the photocatalyst is 2:1,and the photocatalytic activity is high.     

钢渣处置工艺的清洁生产研究与实施

该课题研究了用水淬法和蒸汽法相结合的技术消除钢渣中的游离氧化钙;用传统的破碎磁选与高精度的强磁选相结合,以独创的递进除铁技术使钢渣中的含铁量由18%降至1%;用专项技术改制的管式磨、活化环,蒸汽熟化,递进式除铁,o-sepa选粉,高频振动粉磨,PPC集料器组成钢渣微粉清洁生产工艺.结果表明该工艺在国内尚属首例,具有较好的推广应用价值.     

用高效分散剂碳化法从煤矸石中制备超细氢氧化铝粉体

利用煤矸石为原料制备超细氢氧化铝粉体.采用高温煅烧活化煤矸石,利用C2S晶相转变制备煤矸石自粉化料,用8%Na2CO3溶液从煤矸石自粉化料中以NaAlO2形式提取铝组分,用高效分散剂碳化法制备超细氢氧化铝粉体.研究了高效分散剂碳化法制备高纯超细氢氧化铝粉体的影响因素,找出了高效分散剂碳化法制备超细氢氧化铝粉体的最佳条件,制备出了平均粒度＜100nm、纯度＞99.9%的氢氧化铝,为煤矸石的高价值利用开辟了一条新的途径.     

Degradation of benomyl, picloram, and dicamba in a conical apparatus by zero-valent iron powder

Reduction of some pesticides (benomyl, picloram, and dicamba) was studied in an aerobic batch conical pilot system to investigate the disappearance of these pesticides on contact with iron powder (20 g/l, 325-mesh). Aqueous buffered solutions of the compounds were added to the system followed by zero-valent iron powder (ZVIP), and the decline in the pesticide concentrations was monitored over time. HPLC analyses show a complete disappearance of picloram (1.20 mg/l) after 20 min of reaction. Benomyl (1.00 mg/l) and dicamba (1.25 mg/l) disappear after 25 and 40 min, respectively. The t₅₀ values ranged from 3 to 5.5 min, and were about slightly less than the t_1/2 values reported when the log of the relative HPLC peak area was plotted versus time, where the relative peak area was calculated by dividing the measured peak area by the initial peak area. Pathways for the degradation of the studied pesticides by ZVIP are proposed.