论工艺参数对烧结产质量的影响及分析

本文论述了正确认识烧结工艺参数对搞好烧结生产的意义，介绍了烧结工艺参数其及相互关系，详述了烧结主要工艺参数对其产质量的影响，提出了烧结工艺参数认识的几点结论性意见。     

持续改进谋发展技术创新增效益

介绍了焦化厂白建厂以来的工艺及其装备改造过程，对重点改造项目进行了评述，并对工艺及其装备的改进方向提出了建议。     

缓冷坑热处理工艺的开发与应用

本文通过对轧钢厂现有两座缓冷坑的工艺及设备条件的分析研究，提出开发其热处理工艺的技术操作要点，经过认真试验及探索，提出了工艺改进措施，使其具备一定规模热处理能力，且其性能均匀稳定。     

锥形轴套铸造工艺设计思想与方案讨论

笔者在《铜合金常见形状厚壁铸件的铸造工艺研究》及《铜合金异常形状厚壁铸件的铸造工艺研究》两篇文章中，对7类常见形状厚壁铸件给出了较为成熟的铸造工艺模式和对6种典型异常形状厚壁铸件给出了较为成熟的铸造工艺方案，但限于篇幅，无法对其工艺设计思想和设计方法展开介绍。本文通过对十多年前的一个失败的工艺案例——锥形轴套的铸造工艺重新研究，探讨如何将某些补缩通道不足的常规铸件，将其壁厚适当加厚当作壁铸件来处理，借助于凝固模拟技术，进行多个工艺方案的比较，选择出最佳铸造工艺方案，本文旨在通过对锥形轴套铸造工艺方案的研究，着重介绍贯穿于其中的工艺设计思想和设计方法。     

日本NKK公司福山厂HPS工艺的发展及应用

叙述了HPS工艺的产生、发展及作用，并将其与其它造块工艺进行了比较，同时对日本钢管公司福山厂HPS工艺的应用效果进行了阐述。     

小球烧结工艺的发展及应用

叙述了小球烧结工艺的特点及发展，并将其与其它造块工艺进行了比较，同时对日本钢管公司福山厂和国内主要厂家小球烧结工艺的应用效果进行了阐述。     

离子交换树脂的绿色再生工艺

离子交换树脂的绿色再生工艺目前主要指的是电再生工艺，其与以往的化学再生工艺的主要区别是利用电力、水及先进的再生技术取代了化学酸碱再生的传统工艺，其以节约成本，绿色无污染为主要特点。本文就将从常见的复床和混床树脂的再生工艺阐述树脂电再生的一般工艺原理和研究成果，期望对离子交换树脂的绿色再生工艺的推广和普及以及发展起到积极作用。     

温压工艺的研究进展

温压工艺在制造低成本、高密度、高强度、高精度异形复杂的粉末冶金零件方面具有巨大的优势。因而，详细介绍了该工艺所具有的诸如压坯密度大、强度高，烧结密度高、密度分布均匀，脱模压力低，制造成本低等技术与经济特点；分析了其关键技术，如温压用粉末制备、新型润滑剂和温压系统；总结了其致密化机理，即颗粒重排和塑性变形，并概括了其应用状况。最后指出发展我国温压工艺的意义。     

锌合金压铸件无氰碱性镀铜技术

我国由于行政上的原因，无氰碱性镀铜工艺以往都集中在单一镀种的研究开发上，而围绕其大规模生产运用的相关工艺支持却甚少，因而限制了其推广应用。尤其是锌压铸件无氰碱性镀铜后的结合力问题一直未得到有效地解决。佛山市毅达杰有限公司通过实验和生产应用，在锌合金压铸件上采用SF-628无氰碱性镀铜工艺和该公司的镀前处理工艺，取得了优良的附着力，为进一步推广无氰碱铜工艺积累了经验。     

浮选工艺节能降耗途径分析

本以铜浮工艺为基础，简单分析了浮选工艺的能耗结构，对其节能降耗途径进行了探讨。     

轮带式连铸连轧线生产电池锌饼的工艺及质量

本文通过对生产电池锌饼不同工艺方法的比较,认为轮带式连铸连轧线是目前生产电池锌饼最佳的工艺方案,并以该工艺方案为重点,阐述影响电池锌饼质量及性能的因素,提出生产理想产品质量所需要的合理的工艺参数及操作方法。     

优化合金成分与生产工艺,控制电池锌饼的合适硬度

结合四轮轮带式连铸连轧生产线生产电池锌饼卷坯的特点。阐述合金成分与生产工艺对电池锌饼硬度的影响，指出生产合适电池锌饼硬度最优化的合金化学成分与生产工艺条件。     

Slug Test Analysis in Vertical Cutoff Walls. II: Applications

This paper addresses practical applications of the type curve method and modified linear curve fitting method described in a companion paper for evaluating the hydraulic conductivity of a vertical cutoff wall. Sensitivity analyses were performed for factors that might influence results from a slug test in a vertical cutoff wall. The factors considered are (1) width of the vertical cutoff wall, (2) eccentricity of a well location, (3) well aspect ratio, and (4) distance from the upper and lower boundaries of the wall to a well intake and discharge section. In addition, the effects of variable hydraulic properties—hydraulic conductivity (k) and specific storage (Ss)—on the results of a slug test are evaluated. Also, the effect of initial slug size and difference between a rising and falling head slug test are investigated in connection with the variability of the hydraulic properties. Analyses show that the compressibility of the porous medium has a dominant effect. Various errors can arise from the simplifying assumptions used in slug test analysis, but these errors often tend to offset one another. Performing sequential slug tests can yield progressively lower hydraulic conductivity as a result of consolidation of the barrier wall material.     

锌饼卷坯厚度精度的控制

从设备、工艺、操作等方面叙述影响锌饼卷坯厚度精度的因素。     

Actinic keratoses

Shotgun slug injuries have received little attention while shotgun pellet wounds have been well described. Twenty-two shotgun pellet and 13 shotgun slug injuries treated over a 14-year period were retrospectively reviewed. Extremity and thoracic wounds were most frequent in both groups. The incidence of vascular and nerve injuries was similar for slug and pellet wounds. Angiography was more often used to evaluate pellet wounds for vascular disruption. The rate of wound infection was 38% for slug wounds versus 32% for pellet injuries. Tissue grafting was more frequently necessary for reconstruction after pellet injury. Long-term disability was documented in 15% of patients with pellet wounds and 23% with slug wounds. Despite similarities in wound location and outcomes, the ballistic differences between shotgun slugs and pellets resulted in significant differences in wounding characteristics and extent of injury which have important ramifications in management.     

Experimental Evidence of the Applicability of Colebrook and Borda Carnot-Type Head Loss Formulas in Transient Slug Test Analysis

Radius changes along the flow path inside a well can have a substantial nonlinear impact on head responses to a slug test. The present paper investigates the applicability of head loss formulas rooted in steady-state pipe hydraulics to account for minor and major head losses in transient slug test analysis. Such nonlinear head losses, which frequently occur when using a packer for test initiation, have not systematically been investigated before. Packer-internal turbulence is accounted for based on Colebrook’s formula, while minor head losses originating at the inlet and outlet of the packer are treated by Borda Carnot-type head loss formulas. The analysis of a specifically designed set of 12 slug tests provides extended experimental evidence of the applicability of these nonlinear head loss formulas when accounting for well bore-internal turbulence and minor head losses in transient slug test analysis.     

电池锌饼裂纹产生原因浅析

本文分析了电池锌饼裂纹产生原因，并针对轮带式连铸连轧工艺，提出了改进方法。     

A way of following individual cells in the migrating slugs of Dictyostelium discoideum

In the development of the cellular slime mold Dictyostelium discoideum there is a stage in which the aggregated amoebae form a migrating slug that moves forward in a polar fashion, showing sensitive orientation to environmental cues, as well as early signs of differentiation into anterior prestalk and posterior prespore cells. Heretofore it has been difficult to follow the movement of the individual cells within the slug, but a new method is described in which small, flat (one cell thick) slugs are produced in a glass-mineral oil interface where one can follow the movement of all the cells. Observations of time-lapse videos reveal the following facts about slug migration: (i) While the posterior cells move straight forward, the anterior cells swirl about rapidly in a chaotic fashion. (ii) Turning involves shifting the high point of these hyperactive cells. (iii) Both the anterior and the posterior cells move forward on their own power as the slug moves forward. (iv) There are no visible regular oscillations within the slug. (v) The number of prestalk and prespore cells is proportional for a range of sizes of these mini-slugs. All of these observations on thin slugs are consistent with what one finds in normal, three-dimensional slugs.     

Numerical Model for Analyzing Slug Tests in Vertical Cutoff Walls

Analysis of a slug test estimating the hydraulic conductivity of a vertical cutoff wall is complicated by the high compressibility of backfill materials and by the proximity of a well to the edge of the cutoff wall. An implicit finite-difference program, named Slug_3, was developed to analyze results of slug tests in the vertical cutoff wall. The program uses block-centered mesh formulation, considers variable hydraulic conductivity and specific storage, and has automatic time-step control and mesh generation. The geometry and flux-boundary condition in the well-intake section is fully considered, and the interface between a cutoff wall and natural soil formation is modeled as a constant head-boundary condition. Also, a filter cake can be simulated in Slug_3. Slug_3 is verified by comparing results with an analytical solution for a partially penetrating well in aquifers and another numerical code, MODFLOW-96, for a vertical cutoff wall. The program provides a new analytic tool for analyzing slug-test results from vertical cutoff walls and is unique in the ability to simulate variable hydraulic properties, which can be particularly important for highly compressible materials such as soil–bentonite backfill in a cutoff wall.