片碱生产及改进措施实施效果

阐述了新疆天业股份有限公司石河子化工厂在现有的传统锅式法片碱生产过程中，依据现有片碱机的技术特性及片碱生产的关键指标，围绕降低片碱冷却温度、片碱颜色达标、碱尘回收、确保片碱质量方面采取的措施，并取得了较好的效果。     

舌片式导流管强化蒸汽冷凝传热的研究

通过对舌片式导流管强化垂直圆管内蒸汽冷凝传热研究 ,在实验范围内 ,传热系数增大3.6 4～ 5 .6 1倍、效果十分显著 ,舌片垂直节间距越小 ,舌片愈宽强化传热效率越好     

Resistance of metallic substrates protected by an organic coating containing glass flakes

The resistance against corrosion of an epoxy-polyamine-based coating immersed in a 3 wt.% sodium chloride solution was investigated by electrochemical impedance spectroscopy (EIS). The organic coating contained glass flakes as pigment in order to enhance its barrier characteristics. The data show that this coating is more strongly adhered and exhibits higher protection characteristics when applied onto carbon steel substrates than on galvanized steel. Though the capacitance of the coating (C_C) does not show any appreciable variation with immersion time, the resistance (R_PO) of the film is observed to increase with time upon immersion. The analysis of the data sustains that the organic film behaves as a porous, non-barrier coating. Two time constants are observed even at earlier exposures, and the improved corrosion resistance developed after the coating system was exposed to the test electrolyte is considered to originate from the precipitation of corrosion products within the pores in the film.     

用萃取-置换镀-球磨法一次性制备片状银包铜粉

将自制的球形超细铜粉,通过球磨改性成为片状铜粉,同时进行化学还原和铜离子萃取,在银氨溶液中置换镀银,使银均匀地沉积在铜的表面,并借助球磨的机械作用使镀层更紧密,包覆更完全.该工艺过程简单,可兼顾成本和性能两方面要求,可一次性制备高性能、低成本的片状镀银铜粉.     

某细鳞片石墨柱浮选新工艺研究（增刊）

黑龙江某细鳞片石墨矿采用浮选工艺进行选别,采用改进后的KYZB型浮选柱,对生产现场中不同浮选作业的矿浆,进行了充气量、给矿速度等不同浮选条件下的鳞片石墨柱浮选新工艺研究。研究结果表明,相比于浮选机,KYZB型浮选柱精矿回收率偏低,但是可以获得固定碳含量更高的浮选精矿。通过浮选柱产品的粒度筛析,查找了回收率偏低的原因和鳞片石墨柱浮选的重要影响因素。     

柴油发动机油箱锡青铜浮子接触片失效原因分析

针对柴油发动机油箱锡青铜浮子接触片失效的问题,采用SEM和EDS对该浮子接触片分别进行了表面形貌和成分分析。结果表明,浮子接触片失效的原因是由于硫化学腐蚀生成腐蚀产物,使得接触电阻增大而产生热烧蚀,同时引起接触片表面产生机械磨损。     

EFFECT OF REMOVING HYDROGEN FROM HEAVY RAIL STEEL BLOOMS BY STACK COOLING IN PANZHIHUA IRON AND STEEL COMPANY

The determination of dffusible hydrogen in U71Mn heavy rail steel,and hydrogen diffusivityas well as the hydrogen distribution in the cross section of blooms with stack cooling were stu-died.The results showed that,most of the hydrogen in blooms of heavv rail steel is diffusible,the hydrogen diffusivity in U71Mn rail steel blooms at room temperature is(0.85—1.02)×10~(-6)cm~2/s,after stack cooling,the hydrogen content in bloom will decrease greatly which ishelpful to form the flake-free phenomenon in the heavy rail produced by Panzhihua Iron andSteel Company.     

交流阻抗法评价玻璃鳞片乙烯基酯树脂涂料的耐蚀性

采用交流阻抗法（EIS）评价了玻璃鳞片乙烯基酯树脂涂料的防腐蚀性能,并对其耐腐蚀机理进行了研究.结果表明,添加玻璃鳞片的涂层比未添加玻璃鳞片涂层具有更好的抗渗透性和耐蚀性.当玻璃鳞片与酚醛环氧乙烯基酯树脂的质量比为30/100～35/100时,涂层具有较佳的耐蚀性能,在3.5％NaCl溶液中浸泡120 d后,涂层极化阻抗仍然在10.9 Ω•cm2以上,比乙烯基酯纯树脂涂层极化阻抗高2个数量级,涂层电容稳定在8.40×10-11 F/cm2左右,吸水率保持在4.2%. 〖HT5”H〗关键词：〖HT5”SS〗     

黑龙江某石墨矿工艺矿物学研究

对黑龙江某石墨矿进行了工艺矿物学研究,查明了矿石中石墨的赋存状态,并就影响选矿指标的矿物学因素进行了分析。工艺矿物学研究结果表明,该石墨矿属鳞片石墨矿,选别作业时容易获得较理想的选矿指标,但矿石中的石墨嵌布粒度细,选别过程中需要细磨,细磨会破坏部分已解离的石墨大鳞片,降低大鳞片石墨产率,因此在选矿过程需加强对大鳞片石墨的保护,尽可能早回收;脉石矿物中含有一定量的白云母以及少量的绿泥石、高岭石,对石墨精选有一定影响。     

低温易膨胀石墨的制备工艺研究

以不同粒度的天然鳞片石墨作为原料,HClO4/H3PO4/(CH3CO)2O/CrO3作为氧化插层体系,通过对反应物用量、时间、温度进行研究,确定了最佳制备工艺条件.结果表明:按反应物质量比为C∶HClO4∶H3PO4∶(CH3CO)2O∶CrO3=1∶3∶2.3∶1.4∶0.18、反应温度为40℃、反应时间为70mi...