以废钡渣为原料制取氯化钡的研究

本文研究了以直接耐晒黑Ｇ染料生产中的废钡渣为原料制取氯化钡的方法，氯化钡的得率达到废钡渣量的７０．９９％，产品质量达到一级品的标准。     

利用含钨废催化剂生产钨酸的工业实践

笔者较为详细地阐述了利用含钨废催化剂生产钨酸的工艺流程、各工序反应原理及其操作工艺实践、产品质量情况、原辅材料单耗等。实践证明 ,该工艺实用性强 ,具有显著的经济效益、社会和环保效益。     

Thermal Expansion Behavior of La1—xSrxMn1—yCoyO3—δ Perovskites

The thermal expansion behavior of La1-xSrxMn1-yCoyO3-δ (x=0.2-0.4, y=0.1-0.3) perovskites in air has been investigated. The average linear thermal expansion coefficients increased with increasing Sr content up to 40 mole fraction or Co content up to 30 mole fraction. The expansion is generally attributed to an increase in the average cation radius as some of the cations in the perovskite are reduced in valence when oxygen ions are removed from the structure.     

Hazardous waste management problem: The case for incineration

We define the hazardous waste management problem as the combined decisions of selecting the disposal method, siting the disposal plants and deciding on the waste flow structure. The hazardous waste management problem has additional requirements depending on the selected disposal method. In this paper we focus on incineration, for which the main additional requirement is to satisfy the air pollution standards imposed by the governmental restrictions. We propose a cost-based mathematical model in which the satisfaction of air pollution standards is also incorporated. We used the Gaussian Plume equation in measuring the air pollution concentrations at population centers. A large-scale implementation of the proposed model within Turkey is provided.     

Al-Cu-Fe QUASICRYSTALLINE PHASE FORMATION BY MECHANICAL ALLOYING

Al-Cu-Fe alloys were prepared from elemental powders in a high-energy planetary ball mill. A sequence of solid state reactions resulting in quasicrystal (QC) phase formation takes place during heating of the as-milled powder. These reactions were studied by both differential scanning calorimetry and x-ray diffraction methods. Mechanically alloyed powders were consolidated by cold and hot pressing, as well as by explosive compaction. After annealing at sufficiently high temperatures, the consolidated samples are single-phase QC, except the ones consolidated by explosion. The high reactivity of the as-milled alloys causes the appearance of high porosity of the consolidated samples after the annealing.     

锌精馏余热利用可行性探讨

本介绍了锌精馏精炼的简单原理、设备组成、余热资源及利用方案。     

利用高酸值餐饮废油脂制备生物柴油

以高酸值餐饮废油脂为原料,在酯化反应后再经两步酯交换反应制备生物柴油。在酯化反应中添加吸水剂可降低油脂的酸值,经一次酯化反应即可将油脂的酸值降至2m g/g左右,满足酯交换反应的要求。考察了酯化反应中吸水剂的添加方式、种类及其用量对酯化反应的影响,以及酯交换催化剂的种类及用量对脂肪酸甲酯(FAME)收率和产物组成的影响。实验结果表明,以凹凸棒土为吸水剂(用量为餐饮废油脂中游离脂肪酸质量的3%),且在酯化反应30m in时加入,酯化效果较好;以质量比为1∶1的NaOH和KOH混合物为催化剂进行两步酯交换反应时,催化剂的最佳用量依次为1.00%和0.75%(质量分数,基于油脂的质量),FAME收率最高达到96.33%。     

Solid Works在螺杆空压机主机设计中的应用

介绍了一种螺杆空压机主机整个产品设计周期中Solid Works在三维造型、应力分析、动态仿真方面的应用。     

Preparation of ultra-fine copper powder and its lead-free conductive thick film

In this paper, non-agglomerated monodispersed ultra-fine copper metallic powders have been synthesized with chemical reduction method. Fine lead-free glass powders were also prepared by solid synthesis process. Thick film paste prepared by above-mentioned copper metallic powders and lead-free glass powders was applied as conductive paste of MLCC. Mixture of glass and zinc oxide give the thick film a high adhesion strength which is attributed to the rough interface from interfacial reaction between glass and chip, and a good densification. Diffusion of metal between copper thick film and nickel thick film is clear. Ni-Cu solid solution appears under high temperature firing.     

陈垃圾土的压缩性试验研究

首先介绍了重庆市主城区填埋场的现状，论述了深入研究陈垃圾土压缩特性的重要性。作者在简要总结了采样场内陈垃圾土的基本物理性质后。通过室内侧限压缩试验(亦称固结试验)，得出了描述陈垃圾土压缩性质的基本参数，如αv、Es、mv和Cc等，试验表明陈垃圾土是一种不同于常见土类的高压缩性欠固结土，试验结果可为填埋场再利用和已封闭填埋场的沉降计算提供依据。