GJ5×2双槽剥片机及其在高岭土剥片中的应用

GJ5×2大型双槽剥片机是国内超细物料加工中最新出现的超细磨/剥片设备,也是目前国内这一领域内最大规格的设备,已成功应用于煤系硬质高岭土剥片中,单机能力可达1.5～2.0t/h,产品细度可达小于2μm颗粒占85%～90%。     

A replacement of traditional insulation refractory brick by a waste-derived lightweight refractory castable

Lightweight insulation refractories are essential for high-temperature performance to reduce energy consumption. This study investigates a new insulation material, that is, solid waste rice husk ash (RHA) derived lightweight refractory castable, replacing traditional insulation refractory brick. The RHA is generated after the burning of rice husk as biomass fuel. The RHA is used as an aggregate and alkali-extracted silica sol from RHA as a binder to fabricate the insulation castable. The nanosilica containing (~30 wt%) sol is employed to synthesize the refractory castable by varying the sol amount (2.5-12.5 wt% silica from sol). The castable specimens are cast by a vibro-caster and fired at 900-1200°C in a muffle furnace. The physic-mechanical and thermal conductivity (κ) of the castable is investigated. At 1100°C with 10 wt% dry sol retaining sample shows an excellent apparent porosity (~65%), low bulk density (~ 0.8 g/cm³), and κ (0.136 W/m k) with sustainable compressive strength (6 MPa). The acquired results are a good match with the literature (other wastes-derived insulation materials) and industrial (silica insulation brick) obtained data. These promising outcomes may inspire the refractory industries for using RHA as an aggregate and RHA extracted sol as a binder for making insulation castable.     

甘油三酸脂对硅溶胶的分散作用

通过对硅溶胶泥浆的流变性实验确定了硅溶胶泥浆的流变模型，验证并分析了加入少量经过低温氧化过的甘油三酸脂（ＧＴＯ）不改变硅溶胶泥浆的流变模型，但能有效地改善其流变性能。因此，ＧＴＯ可作为硅溶胶结合浇注料的高效减水剂。     

工业纯钛电镀槽焊接工艺及变形控制

通过焊接工艺评定试验,设计了工业纯钛电镀槽的氩弧焊焊接工艺,分析了影响其焊缝质量和焊接变形的主要原因,并采取了相应的工艺措施。     

溶胶-凝胶结合耐火浇注料抗CO侵蚀性能研究

研究了新型溶胶．凝胶结合耐火浇注料的抗CO侵蚀性能，同时也与传统的水泥结合耐火浇注料进行了对比试验，并从侵蚀前后的表观特征、理化性能和微观结构等多方面探讨了其CO侵蚀作用机理。结果表明，浇注料中的铁氧化物含量，CO气氛的浓度等多种因素决定了CO侵蚀反应的强度。而在同等实验条件下，溶胶-凝胶结合耐火浇注料的抗CO侵蚀性能要大大优于水泥结合的耐火浇注料，因此是替代传统浇注料的理想材料。     

F-阶梯知识与F一阶梯挖掘一发现

利用单向导粗集((one direction singular rough sets)与它的动态特性,给出F-阶梯知识、F-阶梯度的概念。利 用这些概念,提出F-阶梯知识分辩定理、最小F-阶梯知识挖据发现定理、最大F-阶梯知识挖掘一发现定理、知识发现 依赖一筛选定理与F-阶梯知识内潜藏原理,给出F-阶梯知识挖掘一发现准则及应用。这些结果是单向导粗集的新特性 与单向导粗集的动态特性的新应用。     

Effect of spinel content on the properties of phosphoric acid bonded high alumina castables

In order to study the effect of fused spinel on the properties of phosphoric acid bonded high alumina castables, samples with different contents of fused spinel were prepared. The results show that when the contents of the fused spinel are between 8% and 16% (mass fraction), the castables have good properties. The castables overcome the shortages of the phosphoric acid bonded high alumina castables with bauxite cement as a hardening promoter. The experiments demonstrate that most of the service properties of the castables with fused spinel are better than those of the normal phosphoric acid bonded castables which use bauxite cement as a hardening promoter. The examination of the materials indicates that free MgO inclusions in the spinel powder can promote the hardening of the castables.     

无风撑钢管混凝土中承拱桥非线性试验分析

通过大比例尺模型桥荷载试验结果与非线性计算结果比较，提出拱肋截面为三角形空间桁架结构的中、下承式钢管混凝土拱桥，可不考虑非线性问题。     

附加气动措施后箱梁断面三分力系数试验研究

通过节段模型风洞试验,研究某大桥各种抗风气动措施对静力三分力系数的影响,以期改善结构受力特性.以导流板位置、中央槽开孔率、栏杆透风率、检修车轨道位置、风障、车辆作为分析三分力系数的影响因素.研究表明:三分力系数的改变直接影响到静风荷载,这些参数的变化对主梁静风荷载的影响不容忽视.其中风障对主梁阻力系数的影响最为明显,在大攻角时主梁阻力系数在成桥有风障状态显著增大.     

一起带式输送机输送带跑偏事故分析及对策

对刚换上一条防撕裂新带式输送机在试运行时,由于输送带浮在面上无法落槽而产生忽左忽右的跑偏进行分析,指出了托辊对输送带运行所产生的摩擦力,在输送带运行中起到平衡作用以及不落槽所采取的解决办法。