无水泥铁沟浇注料的研制

铝酸钙水泥是目前铁沟浇注料最为常用的结合剂,但水泥中CaO的存在容易造成材料抗高炉熔渣侵蚀性能的恶化,因此超低水泥和无水泥浇注料被广泛研究.以板状刚玉、碳化硅、氧化铝微粉等为主要原料,研究了结合剂ρ-Al2O3和铝酸钙水泥配比加入量对Al2O3-SiC-C浇注料各种性能的影响.实验结果表明ρ-Al2O3可以替代传统的铝酸钙水泥结合剂,实现高炉铁沟浇注料无水泥化,比传统的浇注料具有更佳的性能.     

马钢2^# 2500m^3高炉INBA渣处理系统设计

通过对马钢1^# 2500m^3高炉冷INBA渣处理系统装置应用情况的分析以及对INBA系统工艺流程、控制系统、粒化装置、过滤装置、输送装置改造的分析总结,并对目前国内大型高炉常用的几种渣处理方法进行比较,认为热法改进型INBA工作可靠,操作简单,节约成本,降低能耗,适用于2^# 2500m^3渣处理系统设计.     

顶吹转炉溅渣护炉工艺冷态模拟试验研究

采用水力模型的研究方法，针对某钢厂90t转炉溅渣护炉工艺进行冷态模拟试验．通过测定溅到转炉炉衬上的渣量多少，分别对顶枪枪位、气体流量、渣量等工艺参数的影响进行比较，确定最佳操作工艺参数．     

新型碱矿渣水泥的研制

研制了一种无硅酸盐熟料的新型碱矿渣水泥、矿渣掺量可达８０％－９０％，压强可达６５ＭＰａ以上，工业化生产具有能耗低，污染少，投资少的特点。     

炉渣对定氧探头的作用

研究了液态FexO渣及碱性复杂炉渣中FexO对定氧探头的作用。纯FexO渣对探头的ZrO_2(MgO)管有强烈的侵蚀,且随温度的上升而加剧;碱性复杂炉渣对ZrO_2(MgO)管的侵蚀较轻微,当侵蚀达到一定程度时会使探头损坏。在碱性复杂炉渣中CaF_2的作用下,渣液与ZrO_2(MgO)管反应,在其表面生成锆酸钙,使电池电动势达到平衡的时间后延,甚至使测定失败。因此,它不宜用于测定高CaF_2含量的碱性炉渣。     

低掺量粉煤灰基地聚物胶凝材料性能试验研究

为了研究粉煤灰基地聚物胶凝材料的组成对其性能的影响,对C类粉煤灰分别掺入少量（质量分数小于17%）偏高岭土和矿渣粉后,进行了两种地聚物胶砂试块的力学性能试验研究,并与相同配比、相同制作养护条件下的普通硅酸盐水泥胶砂试块进行了比较.试验结果表明：纯粉煤灰（C类）地聚物胶凝材料强度低于P.O 42.5水泥;当外掺料质量分数大于17%时,粉煤灰基地聚物胶凝材料强度超过同龄期（14 d）的水泥;掺入矿渣粉的粉煤灰基地聚物抗压强度高于掺入等量偏高岭土的粉煤灰基地聚物.     

不同钢渣掺量的沥青玛蹄脂碎石混合料路用性能

钢渣作为炼钢产物之一,在我国利用率较低,本研究将钢渣掺入到沥青玛蹄脂碎石混合料中,可提高路用性能又能减轻对天然石料的开采力度。为了确定SMA-13沥青混合料的最佳钢渣掺量,采用等体积法将陈化钢渣替换石灰岩粗集料,制备了5种钢渣掺量的SMA-13沥青混合料,确定了各钢渣掺量的级配组成及最佳沥青用量,通过高温稳定性、水稳定性、低温抗裂性、体积膨胀性等路用性能验证,分析得出最佳钢渣掺量。结果表明：随着钢渣的掺入,混合料的高温稳定性和水稳定性均有增加,超过75%钢渣掺量时开始下降;沥青混合料的低温抗裂性和体积安定性随着钢渣掺入量的增加而下降,但都满足规范要求;钢渣的掺入可以提高混合料的动态模量;通过对以上性能分析,建议SMA-13沥青混合料的钢渣最佳掺量为75%,为将来钢渣在道路工程中更广泛的应用提供参考。     

六棱柱滚筒冷渣机传热效率影响研究

冷渣机是CFB（circulating fluidized bed）锅炉的重要辅机,其传热效率对CFB锅炉的连续稳定运行发挥着重要作用,为了进一步分析颗粒传热效率的关系。以一种多管式六棱柱滚筒冷渣机为研究载体,冷渣管内高温灰渣颗粒为研究对象,基于离散元方法及其数值模型,运用商用软件EDEM（extended discrete element method）来模拟分析高温灰渣颗粒在冷渣管内的传热过程。将颗粒温度T规范化处理为量纲温度T?,以平均温度、温度概率密度函数T-PDF和颗粒运动规律为指标定量分析滚筒转速和颗粒直径对灰渣颗粒传热过程的影响。其中,六棱柱冷渣管边长L=200 mm,长500 mm,壁厚10 mm,管初始温度360 K,颗粒初始温度1200 K。结果表明：颗粒的传热效率随着转速的增加而增加,n=10 r/min相对于n=4 r/min的散热效率增加了61.1%;颗粒的传热效率随着粒径的增大而减小,d=5 mm相对于d=3 mm散热效率的下降了30.7%。转速是通过翻转次数来影响传热效率,粒径是影响接触点碰撞次数来影响传热效率。     

Dynamic mass variation and multiphase interaction among steel,slag, lining refractory and nonmetallic inclusions: Laboratory experiments and mathematical prediction

The mass transfer among the multiphase interactions among the steel, slag, lining refractory, and nonmetallic inclusions during the refining process of a bearing steel was studied using laboratory experiments and numerical kinetic prediction. Experiments on the system with and without the slag phase were carried out to evaluate the influence of the refractory and the slag on the mass transfer. A mathematical model coupled the ion and molecule coexistence theory, coupled-reaction model, and the surface renewal theory was established to predict the dy-namic mass transfer and composition transformation of the steel, the slag, and nonmetallic inclusions in the steel. During the refining process, Al2O3 inclusions transformed into MgO inclusions owing to the mass transfer of [Mg] at the steel/refractory interface and (MgO) at the slag/re-fractory interface. Most of the aluminum involved in the transport entered the slag and a small part of the aluminum transferred to lining re-fractory, forming the Al2O3 or MgO·Al2O3. The slag had a significant acceleration effect on the mass transfer. The mass transfer rate (or the re-action rate) of the system with the slag was approximately 5 times larger than that of the system without the slag. In the first 20 min of the re-fining, rates of magnesium mass transfer at the steel/inclusion interface, steel/refractory interface, and steel/slag interface were x, 1.1x, and 2.2x, respectively. The composition transformation of inclusions and the mass transfer of magnesium and aluminum in the steel were predicted with an acceptable accuracy using the established kinetic model.     

低温低碱度脱磷渣中磷的富集行为

At low basicity and low temperature, the dephosphorization behavior and phosphorus distribution ratio (L_P) between slag and molten steel in the double slag and remaining slag process were studied with a 180 t basic oxygen furnace industrial experiment. The dephosphorization slags with different basicities were quantitatively analyzed. At the lower basicity range of 0.9–2.59, both L_P and dephosphorization ratio were increased as the basicity of dephosphorization slag increased. Dephosphorization slag consisted of dark gray P-rich, light gray liquid slag, and white Fe-rich phases. With increasing basicity, not only did the morphologies of different phases in the dephosphorization slag change greatly, but the area fractions and P₂O₅ content of the P-rich phase also increased. The transfer route of P during dephosphorization can be deduced as hot metal → liquid slag phase + Fe-rich phase → P-rich phase.