新型捕收剂用于矾山磷矿的选矿试验研究

为了探索矾山磷矿常温浮选的选矿工艺,使用H_(907)和新研制的AW—02作为捕收剂进行了连续扩大试验,在常温和不加碱的浮选条件下,获得了精矿品位约36.70％、回收率约94.5％的较好指标。     

KYF、XCF型浮选机的选磷实践

为适应磷矿选矿的工艺要求,对KYF型及XCF型浮选机的充气控制、叶轮结构、主轴套简、中间箱及尾矿箱进行了改进,还对风机的选型及风路设计进行了优化,使其成功地取代了黄麦岭磷矿原用的5A浮选机,取得了明显的节能和省药效果。     

Photopolymerization and thermal behavior of phosphate diacrylate and triacrylate used as reactive‐type flame‐retardant monomers in ultraviolet‐curable resins

Tri(acryloyloxyethyl)phosphate (TAEP) and di(acryloyloxyethyl)ethyl phosphate (DAEEP) were used as reactive‐type flame‐retardant monomers along with commercial epoxy acrylate and polyurethane acrylate oligomers in ultraviolet (UV)‐curable resins. The concentrations of the monomers were varied from 17 to 50 wt %. The addition of the monomers greatly reduced the viscosity of the oligomers and increased the photopolymerization rates of the resins. The flame retardancy and thermal degradation behavior of the UV‐cured films were investigated with the limiting oxygen index (LOI) and thermogravimetric analysis. The results showed that the thermal stability at high temperatures greater than 400°C and the LOI values of the UV‐cured resins, especially those containing epoxy acrylate, were largely improved by the addition of the monomers. The dynamic mechanical thermal properties of the UV‐cured films were also measured. The results showed that the crosslink density increased along with the concentrations of the monomers. However, the glass‐transition temperature decreased with an increasing concentration of DAEEP because of the reduction in the rigidity of the cured films, whereas the glass‐transition temperature increased with the concentration of TAEP because of the higher crosslink density of the cured films. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 185–194, 2005     

贵州宏福实业开发有限总公司磷肥厂磷肥装置与美国Farmland和IMC的评比

将贵州宏福实业开发有限总公司DAP装置与其原设计模式装置——美国Farmland和IMC磷肥装置的总图布置、工艺流程进行对比;并评比各装置操作的合理性。从合理性评比中可看出设计中的优点与不足,供同类行业在设计、生产技改中借鉴。