锰硅合金生产中入炉锰矿的优化搭配

通过对以往配矿思路的缺陷分析,引入炉料含锰的概念和与配方思路,相应补充和推导部分配矿参数,浅谈了这些参数的应用方法及步骤,以达到合理与矿和优化配化的目的及效果。     

用大角度伴随粒子法测量聚变中子产额及其校对实验

描述了用大角度（178.2°）伴随α粒子方法测量绝对D-T 聚变中子产额及其校对实验。为此,设计和加工了一套三叉管校对靶室,α粒子探测器分别置于与D∧ 束成90°、135°和178.2°的方向上,测量和比较了三个方向的α粒子谱和绝对中子产额。分析了实验误差来源,并对实验结果进行了讨论。     

立式旋涡流化床悬浮空间颗粒浓度场的研究

本文通过实验，利用微机在线测量系统对旋涡流化床悬浮空间颗粒浓度场进行了测试和分析，得出了有利于稳定燃烧的几点结论。     

Combined cathodoluminescence and X-ray analysis of paint pigments

The suitability of cathodoluminescence (CL) measurements for differentiating between different paint pigments is demonstrated with an example of a combined energy-dispersive X-ray (EDX) and CL analysis of different zinc oxide (ZnO) pigments in a paint fragment where the EDX spectra are virtually identical, but where the CL spectra show significant differences. Consequently, it is possible to distinguish different pigments on the basis of CL spectra and monochromatic CL micrographs.     

Protective Silica Coatings on Zinc-Sulfide-Based Phosphor Particles

A spray drying approach was used to apply 15-nm-thick SiO₂ continuous coatings onto ZnS:Ag phosphor particles. A prehydrolyzed TEOS dip coating formula was used as the SiO₂ precursor. The phosphor was mixed together with the precursor then atomized without allowing gelation to occur until the droplets containing the particles were in flight. The coating gelled and dried while falling through a graded heat zone. The dried coated particles were captured in a cyclone separator and heat-treated to further densify the SiO₂ coating. The coatings protected the phosphors while in service in field emission display (FED) devices.     

A mathematical model for a biological fluidized bed reactor

A physical model is given in the present report for representing a three-phase biological fluidized bed reaction system which consists of microorganism-coated particles, waste water and air. The system is assumed to be well fluidized. The physical model can be represented by two differential equations describing, respectively, the substrate axial dispersion and diffusion/reaction. Numerical values of the physical parameters are selected from the literature or estimated from semi-empirical equations. The governing system equations are solved by an iterative finite-difference scheme. The theoretical predictions are compared with several experimental measurements and the agreement between them found to be very good, validating the physical model reported here.     

银山铅锌矿现场矿石管理的经验

为充分利用有限的铅锌资源,稳定铅锌供矿品位,降低生产成本,提高矿山经济效益,经过多年配矿实践,总结出一个普通的稳定供矿品位技术管理模式即回采作业地质指导→现场矿石管理(井下出矿管理+配矿)→稳定供矿品位,此管理模式具有一定的推广应用价值.     

硫化钠对全矿石诱导浮选的试验研究

在不加捕收剂的条件下，硫化钠可诱导金及其载体矿物黄铁矿、黄铜矿表面疏水上浮，其浮选行为可以通过调整矿浆ｐＨ值、矿浆电位Ｅｈ值和氧化时间加以控制．与常规有捕收剂浮选比较，其药剂制度简单、选择性强、浮选速度快．试验取得的技术指标比较理想．     

焙烧杯体的热惯性

通过严格的热工测定，分析了利用焙烧杯进行铁矿石球团焙烧试验时，加热或冷却气流与焙烧杯内壁面间的热交换过程，提出并验证了焙烧杯热惯性的计算方法。从而以实验室实验为基础，借助数学模型，制订现场焙烧制度，提供了不可缺少的、借以消除规模干扰的重要依据。     

Poly(methyl methacrylate) and polyacrylonitrile dispersions stabilized by gelatin

Methyl methacrylate was polymerized in an aqueous medium in the presence of gelatin using potassium persulfate as initiator. The dispersion mode of polymerization, when the monomer is completely miscible with water, was investigated and compared with an emulsion process, which proceeds at higher monomer concentration. Spherical and relatively uniform polymer particles were formed. Macroscopic precipitation of polymer is prevented by combination of the steric stabilization by grafted gelatin and of repulsive electrostatic interactions from the initiator residues attached to the particle surface. Static and dynamic light scattering have been used to determine the molar mass (molar mass of the whole dispersion particle, M_wD ～ 10⁸-10⁹ g mol^?1) and hydrodynamic radius (R_hD ～ 50-120 nm) of the particles. The number of particles per unit volume does not depend on overall monomer concentration, and it is higher, and therefore the particle size is smaller, than that observed for the soapless emulsion polymerization. The addition of gelatin may be thus used to modify the particle size. Acrylonitrile dispersions were prepared under similar conditions. Unlike methyl methacrylate, this monomer does not swell the polymer particles. While poly(methyl methacrylate) particles are spherical and relatively uniform, the polyacrylonitrile dispersions consist of polydisperse aggregates of tiny polymer particles.