用硫代硫酸钠从分银渣中提取银

本文对采用硫代硫酸钠浸出银，连二亚硫酸钠还原银的工艺从分银渣中提取银进行了研究，结果表明：当分银渣中含银量为0．38％，硫代硫酸钠的用量为160kg/t，氨水用量为50L/t，浸出温度60℃，浸出温度为3h，采用二段浸出，其浸出率＞86％，采用连二亚硫酸钠还原银，还原率＞95％，同时，还原后液可再生用于浸出。     

Recycle use of phosphorous mixer extractant to extract indium

The stripping and regeneration of the loaded organic phase of phosphorous mixer extractant (PPD) were studied. The mixed solutions (3 niol/L HC1 +2 mol/L ZnCl2) were used as the stripping agent and more than 99% of indium can be stripped after three-stage stripping when the volume ratio of organic phase to stripping agent is 1:1. The organic phase can be recycled to use after regeneration with HC1. The parallel contrast experiments with D2EHPA (di-2-ethyl hexyl phosphoric acid) were carried out under the same conditions. The results show that the mixer extractant has good reusability and the stripping and regeneration of PPD are superior to those of DJ3HPA.     

Recovery of gallium from phosphorus industry flue

The flue dust generated during electric furnace production of elemental phosphorus was investigated for the recovery of gallium. Then the flue dust was slurried with water and blended with concentrated sulfuric acid, followed by ageing. The gallium in the dust was thereby converted to soluble sulfate. The factors affecting the dust curing were investigated to understand the process chemistry of the pretreatment. The optimal curing conditions are determined as follows: the mass ratio of dust to water and acid is 1 : 1 : 1, ageing temperature and time are 200℃ and 2h, respectively. Almost all the gallium available to acid dissolution in the dust, about 90% gallium, can be extracted by leaching the cured dust at 80℃ for 1h.     

注射制品收缩规律的模拟实验研究

在全面分析了注射制品成型收缩研究方法及特点的基础上,应用软件模拟实验方法,对不同材料的同一塑件,在相同工艺参数及固定浇口尺寸与位置条件下,进行了不同结构特征变化时塑件成型收缩的模拟实验研究,并给出了模拟实验曲线。结果表明,塑件结构特征对其成型收缩具有明显的影响,结构特征距塑件整体几何中心越远,收缩值越大。     

从赤泥盐酸浸出液中提取钪

本文研究了从赤泥的盐酸浸出液中回收钪的工艺条件。以1％P507^＋煤油为有机相。相比O／A=1：1。萃取时间15min。钪的萃取率达90％以上。用6mol/LHCI为洗液。洗涤有机相二次。水洗二次。洗涤相比O／A-3：1。反萃剂为2NNaOH溶液。相比O／A-3：1，反萃温度50℃。最终得到的富集物中Sc2O3的纯度为66．09％。富集了2600倍以上。     

基于WINDOWS环境下CAPP系统开发的研究

本文结合专为哈尔滨制氧机厂开发的实用ＣＡＰＰ系统，对ＣＡＰＰ系统的研制进行了探索性的研究。以Ｗｉｎｄｏｗｓ作为开发平台，运用了面向对象程序设计语言与特征造型技术的输入方法。最后简单介绍了本系统的决策和输出模块。     

φ114mm直缘成型焊管机组的研制

简介了研制的φ１１４ｍｍ直缘成型焊管机组的技术性能和工艺特点。与普通辊式成型机组相比，该机组工艺先进，焊管精度高。     

热轧窄带钢四辊精轧机新辊系

用新辊系改造 45 0轧机 ,可以最大限度地挖掘出轧机的潜能 ,解决产品转型问题。本文介绍了新辊系的设计特点     

基于神经网络的硬质合金刀片槽型断屑范围的预报

本文是在神经网络理论的基础上，对硬质合金刀片槽型进行了三维特征提取，并详细介绍了各类槽型的待征简化规则及依据，最后用神经网络进行预报，给出几种典型刀片的预报区域图。     

支持产品工程分析的集成产品模型

本文分析了基于产品几何模型、装配信息，支持产品工程分析的集成产品模型描述。该模型在产品几何模型和装配模型的基础上集成了零部件设计参数、参数之间的约束关系、受力状况、力学性能。阐述了Pro/Engineer平台应用系统原理。