基于台达变频器同步解决方案的橡胶硫化成型控制系统

在简介橡胶工业技术自动化进步背景和硫化工艺原理的基础上,详细讨论基于台达机电产品的同步变频传动设计技术。     

轮胎厂硫化过程热水循环系统改进方案

对轮胎厂硫化循环存在问题的分析，应用孔板的节流原理，配合循环系统回路的控制调整，达到节约能源，稳定内压，提高产品质量的目的。     

不同钢种离子渗硫层的抗擦伤性能研究

为改善高速钢，模具钢和45钢的抗擦伤性能，采用低温离子渗硫技术在这三种材料表面生成了FeS固体润滑渗硫层，在QP-100球盘式摩擦磨损试验机上对比研究了这三种材料渗硫层在油润滑条件下的抗擦伤及摩擦学性能。利用SEM与XRD观察分析了渗硫层截面，擦伤面形貌及表面相结构，利用AES及XPS分析了擦伤表面元素沿深度的分布及边界润滑膜化合物的价态，研究表明，渗硫后三种材料的抗擦伤及摩擦学性能都有明显改善，其中渗硫高速钢的抗擦伤性最好。其后依次为渗硫模具钢，渗硫45钢，分析认为，不同钢种渗硫层抗擦伤性能的差异主要由基体硬度，组织结构及耐蚀性三方面决定。     

低温离子渗硫层的干摩擦学性能对比研究

采用低温离子渗硫工艺，分别在W6Mo5Cr4V2,5CrNiMo,2Cr13及45钢表面制备FeS固体润滑层。研究干摩擦条件下的摩擦员性能和渗硫层截面与磨痕形貌，结果表明，4种钢渗硫后减磨耐磨性能都明显提高，其中渗硫W6Mo5Cr4V2钢的摩擦学性能最好，渗硫5CrNiMo钢、渗硫45钢及渗硫2Cr13钢的摩擦学性能依次降低，基体硬度及组织结构不同是渗硫层摩擦学性能产生差异的主要原因。     

Tuning Unique Peapod‐Like Co(SxSe1–x)2 Nanoparticles for Efficient Overall Water Splitting

The development of efficient electrocatalysts with low cost and earth abundance for overall water splitting is very important in energy conversion. Although many electrocatalysts based on transition metal dichalcogenides have been developed, rational design and controllable synthesis of fine nanostructures with subtle morphologies and sequential chemical compositions related to these materials remains a challenge. This study reports a series of peapod‐like composites with component‐controllable Co(S_x Se_1–x )₂ nanoparticles encapsulated in carbon fibers, which are obtained by using Co(CO₃)_0.5(OH)·0.11H₂O nanowires as a precursor followed by coating carbon fiber and an adjustable sulfuration/selenylation process. Due to its increased exposure of active sites and improved charge and mass transport capability derived from the unique structure and morphology, the Co(S_x Se_1–x )₂ samples display favorable catalytic activities. It is found that Co(S_0.71Se_0.29)₂ exhibits the best hydrogen evolution reaction (HER) performance and Co(S_0.22Se_0.78)₂ shows the highest activity for the oxygen evolution reaction (OER). When using Co(S_0.71Se_0.29)₂ as a cathode and Co(S_0.22Se_0.78)₂ as an anode, it demonstrates a durable activity for overall water splitting to deliver 10 mA cm^?2 at a cell voltage of 1.63 V, thus offering an attractive cost‐effective earth abundant material system toward water splitting.     

钨酸盐溶液中钼的硫化理论与实践

针对钨酸盐溶液中钼的硫化进行了系统的热力学分析和试验研究。热力学分析表明 ,在一定的条件下MoO2 - 4可以完全被硫化为MoS2 - 4,其硫化程度随溶液pH的降低和硫化剂用量的增加而提高 ,并查明了MoS2 - 4、MoOS2 - 3、MoO2 S2 - 2 、MoO3S2 - 和MoO2 - 4随溶液pH值及硫化剂用量变化的分布情况。同时通过试验研究进一步考察了溶液pH值、S2 - 用量、硫化温度及硫化时间对硫化效果的影响 ,查明了钨酸盐溶液中钼的硫化规律 ,并获得了合理的硫化工艺条件 ,即在预调pH <7.5、S2 - 游离 1.5～ 2 .0g L或预调pH =7.5～ 8.0、S2 - 游离 2 .0～ 3 .0g L的条件下 ,在 70～ 75℃下保温 1.5～ 2 .0h即可获得较好的硫化效果     

铜绿山氧化铜矿石选矿工艺探讨

研究了铜绿山矿氧化铜矿石的工艺矿物学特性、矿石难选的原因和影响选矿生产指标的主要因素：提出了优化生产工艺的措施，主要包括：“多碎少磨”，控制入磨粒度为8～10mm；实行泥砂分选，并强化矿泥中铜的回收：采用“阶磨阶选”工艺流程代替一段磨浮工艺流程，并合理分配各段磨矿细度；严格控制硫化钠用量、调节适宜的pH值，避免HS过量；混合用药、并合理配比捕收剂用量；采用“优先选金”工艺，提高铜金银回收指标。     

Sulfuration Pretreatment of Ni/Al2O3 Catalyst to Remove Butadiene in FCC C4 Fraction

Abstract

The Ni-based catalysts have more advantages than the most widely used Pd-based catalysts in selective hydrogenating of the butadiene in fluid catalytic cracking (FCC) C₄ fraction. But the selectivity and stability of the Ni-based catalysts aren't good. The sulfuration pretreatment is an effective process to improve the performance of the Ni/Al₂O₃ catalysts. The sulfuration conditions of the Ni/Al₂O₃ catalyst have been studied in this article. The results showed the fittest conditions are that the catalyst was in-situ presulfurized for 60 min by the solution of S concentration 0.07 mol/L. The X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis indicated that the presulfurization declined the Ni crystal dimension.     

电解金属锰硫化除重金属的理论分析与生产实践

阐明了电解金属锰硫化除重金属的理论分析，论述了形成硫化物的平均pH值以及某些金属硫化物溶度积与温度(1／T)的关系，提供了生产实践中的硫化净化除杂的主要化学反应和技术条件。     

涂覆Na_2SO_4-25%NaCl盐膜的Super304H的热腐蚀行为

应用增重分析法研究涂有Na_2SO_4-25%NaCl盐膜的Super304H在650,750℃空气中的腐蚀动力学曲线,采用XRD,SEM(EDS)和EPMA对腐蚀产物、腐蚀截面形貌和元素分布进行分析。结果表明:涂覆Na_2SO_4-25%NaCl盐膜的合金在650,750℃的腐蚀动力学曲线均呈"抛物线"趋势;合金表面形成了含CuFe_2O_4的富Fe氧化物(外层)与富Cr_2O_3(内层)组成的双层氧化膜以及含有孔隙的贫Cr、富Ni的腐蚀影响区;提高腐蚀温度或延长腐蚀时间均可以导致氧化膜与基体分离甚至剥落,腐蚀影响区孔隙密度增大,裂纹向基体延伸。分析认为:腐蚀初期合金发生选择性氧化,形成多层氧化膜;复合盐的熔融破坏氧化膜的完整性,加速氧化、氯化以及硫化的交互作用,导致内硫化和内氧化。