LF炉衬材质对超低硫钢精炼的影响

使用含碳铝镁尖晶石砖、镁碳砖以及电熔氧化镁材质的坩埚进行了超低硫钢精炼试验,探讨了不同耐火材料对LF精炼超低硫钢的影响.结果表明：使用含碳铝镁尖晶石砖的脱硫率最高,有利于深脱硫,使用镁碳砖的效果次之,使用氧化镁坩埚最差.但炉衬使用含碳铝镁尖晶石砖或镁碳砖,将导致钢液增碳,不利于低碳钢生产,在LF精炼超低碳钢时,钢包衬材质应该考虑使用无碳耐火材料.     

固/液界面上腐殖酸吸附机理的探讨

运用SS表面络合模型研究了腐殖酸分子在赤铁矿颗粒/水界面上的吸附情况。主要研究了pH值和离子强度2个重要影响因素,通过分析反应前后溶液的ζ电势和赤铁矿颗粒表面的吸附量,从而得出赤铁矿颗粒/水界面吸附配位反应的程度和腐殖酸分子的吸附机理。     

二氧化氯催化氧化处理铬黑T模拟废水的实验

研究了利用二氧化氯直接氧化和催化氧化处理铬黑T模拟废水，单纯用二氧化氯化学氧化处理COD为2928mg/L的铬黑T废水时，最佳pH值为1．8，二氧化氯投加量为1200mg／L，反应60min，COD去除率为24．1％，BODs去除率为21．8％，脱色率为70．O％．在最佳pH值为1．8，经过1200mg／L二氧化氯和0．25g TiO2催化氧化60mir诟，COD去除率为33．6％，BOD5去除率为53．2％，脱色率为75．2％．结果表明，铬黑T经化学氧化和催化氧化后，分子中苯环和萘环被氧化分解为羧酸和苯醌，并进一步分解为无机物，为难降解废水的后续处理创造了条件．     

Hexagonal hematite platelets synthesized from pyrite cinders by hydrothermal process

Well-crystallized hexagonal hematite (α-Fe2O3) platelets were synthesized by hydrothermal process,using a highly concentrated ferric hydroxide as precursor.The precursor was prepared by adding ammonia to the ferric sulfate solution which was obtained by leaching pyrite cinders with sulfuric acid.Structure and morphology of the synthesized products were investigated by X-ray diffraction,scanning electron microscope,transmission electron microscope and selected area electron diffraction.The results reveal tha...     

金属Mn对烧成Al2O3-C材料力学性能的影响

主要研究了金属Mn对al2O3-C复合材料力学性能的影响，并与添加金属Al，Si的Al2O3-C材料的力学性能进行了对比．在Al2O3-C复合材料中，添加Mn粉的力学性能优于添加Al和Si粉的试样，同时加入Si和Mn时，可显著提高材料的力学性能．还对Mn的作用机理作了理论分析．     

难选金矿细菌预处理技术理论与实践

论述了预处理难选金矿细菌的种类、来源，浸出机理，浸出工艺及工业应用实践．归纳介绍了强化难选金矿细菌浸出的措施．     

STRESS ANALYSIS OF ALUMINA COATINGS ON SILICON CARBIDE BASED REFRACTORIES DURING THERMAL CYCLING

It is possible to enhance the high tempera-ture oxidation resistance and thus prolong the life time of non-oxide refractories by the application of oxide coating. In this -work, silicon nitride bonded silicon carbide refractories were coated with alumina using the plasma spraying technique. X-ray diffraction shouted r-Al2O3 to be the dominent phase in the as-sprayed alumina coatings. The stresses developed in the coating layer during post-spray heat-treatment have been analysed. It was found that the coating-was under a compressive stress below,but when heated above 1100C , the r-Al2O3 phase transformed into a-Al2O3 and this led to the formation of a destructive tensile stress(up to 1700 MPa) which caused cracks to form in and along the iveak bond between the alumina coating and SiC grains. The coatings then delaminated and of fered little protection to the refractory substrate from oxidation. Future research will be directed on the avoidance oj metastable phase formation in the plasma sprayed coating a     

微生物群落在难降解物质生物降解中的作用

分析了微生物群落在难降解物质生物降解中的重要作用．指出微生物群落可通过协调利用底物、共代谢污染物质、转移中间代谢物质等途径对难降解物质进行降解．但要获得高的去除率需对微生物群落进行优化，提高群落整体代谢活性，一般考虑成功驯化、合适的初级基质、充足的营养物质、有效的微生物群体结构等优化因子．厌氧、厌氧-好氧、限氧产甲烷系统是能对难降解物质进行有效降解的3种生态系统．     

消失模涂料剥离性的初步研究

通过对高铬钢玉涂料的现场浇铸实验,结合对涂层残片的微观分析,初步研究了消失模涂料的剥离机理.     

耐火材料制品的温度和热应力分析研究

针对两种典型耐火材料制品,利用有限元分析软件,使用APDL语言编写程序,研究了其钢包和中间包的温度和热应力分布规律.同时对其结构进行了优化,优化后的效果明显,有效地提高了其使用寿命.