一种电磁式自动取样机的设计

为克服以电机拖动方式实现自动取样的取样设备结构复杂,工作时易堵塞、难清理等问题,结合实际生产要求,利用电生磁原理,运用交流接触器、延时继电器等电器元件设计、组装出相应的电路控制机构,并用拉板、弹簧、存料桶等共同组装完成了一种电磁式自动取样机。实践证明,该设备具有制造容易、机构简单、易于清理、耗能较低等特点,能够满足生产要求,具有一定的推广价值。     

阳极铜高速铣削参数优化研究

实测了阳极铜的力学性能参数,用CAD软件建立铣削展开后模型,并将模型导入DEFORM-3D软件对铣削速度、进给量进行仿真研究,根据仿真结果对切削参数进行优化处理,并将其应用于生产实际。实践证明:通过此种方式,不仅节省铣削参数实践验证时间,而且降低了生产成本。     

2D-100-8g空气压缩机振动原因分析与改进措施

某厂2D-100-8g空气压缩机自从安装之后,因缓冲罐及其连接处,包括法兰和出气管道等部位振动剧烈,难以进行正常生产;为此,采用ANSYS软件对产生振动的原因进行模拟,并根据模拟的结果对其进行改进和改造。实践证明,改进后振幅明显下降,取得了良好的效果。     

九顶山铜钼多金属矿区岩浆侵入期次和成矿作用

通过对九顶山铜钼矿区复式斑岩体特征、矿化特征、成矿作用之间关系的研究,初步将九顶山斑岩体岩浆活动可分为3期：第一期为正长斑岩、石英正长斑岩;第二期为斑状花岗岩与煌斑岩（a）组合;第三期为花岗斑岩与煌斑岩（b）组合;其中第一、二期与矿化关系密切。按照容矿围岩可分为斑岩型矿石、矽卡岩型矿石、角岩型矿石和煌斑岩型矿石4类;按成矿元素组合可分为钼矿、钼铜矿、铜矿、磁铁矿、金矿等类型;铜、钼矿化与石英钾长石化带和石英绢云母化带关系密切。     

锌焙砂热酸浸出液还原-中和沉铟的工艺试验研究

针对高铁高铟锌焙砂的热酸浸出液,进行了还原-中和沉铟工艺条件试验研究,确定了最佳工艺条件,其中还原过程:硫化锌精矿过量系数1.3,酸度60 g/L,反应温度90℃,反应时间4 h,还原后液Fe3+浓度小于1.0 g/L;中和沉铟过程:反应pH4.0,反应温度60℃,反应时间30 min,采用该条件,在浸出液中铟含量0.15 mg/L情况下,铁还原率93.81%,中和沉铟率99.80%,渣含铟0.36%。采用还原-中和沉铟工艺,既可有效回收铟,又利于下一步针铁矿沉铁。     

Effect of Fe/SiO2 and CaO/SiO2 mass ratios on metal recovery rate and metal content in slag in oxygen-enriched direct smelting of jamesonite concentrate

The oxygen-enriched direct smelting of jamesonite concentrate was carried out at 1250 °C by changing the slag composition. The effects of Fe/SiO₂ and CaO/SiO₂ mass ratios on the metal recovery rate as well as metal content in slag were investigated. Experimental results indicated that the metal (Pb+Sb) recovery rate was up to 88.30%, and metal (Pb+Sb) content in slag was below 1 wt.% under the condition of slag composition of 21−22 wt.% Fe, 19−20 wt.% SiO₂ and 17−18 wt.% CaO with Fe/SiO₂ mass ratio of 1.1:1 and CaO/SiO₂ mass ratio of 0.9:1. The microanalysis of the alloy and slag demonstrated that the main phases in the alloy contained metallic Pb, metallic Sb and a small amount of Cu₂Sb and FeSb₂ intermetallic compounds. The slag was mainly composed of kirschsteinite and fayalite. Zinc in the raw material was mainly oxidized into the slag phase in the form of zinc oxide.     

Behaviour and characterization of hematite process for iron removal in hydrometallurgical production

The separation of zinc and iron is essential in hydrometallurgical processes, especially for treating high-iron sphalerite. The hematite precipitation process for removing iron is an effective way to achieve the high-efficiency separation of zinc and iron. The authors studied the effect of temperature and time on the precipitation behaviour and characterised the precipitation products through X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy and chemical analysis. The hematite precipitate contained more than 50% iron, less than 0.5% zinc, 0.1% arsenic and 5% sulfur; more than 95% K, 50% Na and 50%–60% F were co-precipitated, and less than 1% Zn, Mg, Mn and Cl remained in the residue. Because of the uncontrolled supersaturation conditions, jarosite and goethite were generated. Extension of the reaction time and increasing the reaction temperature enabled conversion of most of the goethite and sodium jarosite to hematite during the hematite precipitation process.     

X射线荧光光谱法测定氧化锌粉中锌铁硫铜铅

以粉末压片方法自制样品,采用荷兰帕纳科Axios—PW4400型波长色散X射线荧光光谱仪一次测定氧化锌粉中的锌、铁、硫、铜、铅5种元素含量。试验测定结果与常规化学分析方法测定结果一致。分析结果准确、快速,成本低,适合湿法炼锌工艺系统中连续生产需要。     

分子筛纯化器均压阀开度调节

分子筛均压时,可能导致空压机流量波动大,导致空压机电机超负荷,影响空分设备安全运行。分析均压时分子筛纯化器压力、温度变化;研究不同调节次数下均压阀V1207开度情况。结果表明,起始开度随调节次数减少而增大,同时压力波动增大。如:当调节次数为10、20和40次时,V1207起始开度分别为28.8、25.3和24.5,每次开度范围分别为1.8～3.4、1.0～1.7和0.5～1.1。     

高铁锌精矿焙砂强化浸出过程中铁的行为走向研究

针对高铁锌焙砂开展了强化浸出工艺试验研究, 重点考察了浸出过程中铁的行为走向及其控制。结果表明:经中浸和弱浸两段浸出后, 仅约15%的铁浸出进入溶液;铁的浸出主要发生在热酸和高酸浸出段, 两段浸出率合计接近80%;如果浸出液中铁离子浓度过高(>30 g/L), 在低酸条件下会形成铁矾类等复盐沉淀物, 导致浸出渣渣率偏高, 并干扰后续强化浸出作业。