适宜太钢4 350 m3高炉炉渣的成分

 根据太钢4 350 m3高炉的原燃料条件,研究了炉渣二元碱度(R=CaO/SiO2)、MgO含量和Al2O3含量对高炉渣流动性及熔化性温度的影响,从理论上分析了炉渣中Al2O3及MgO的适宜含量范围。结果表明,在原燃料条件下,炉渣碱度在120左右,MgO含量约11%,Al2O3含量为14%~15%时,炉渣流动性较好。     

优化梅钢高炉炉渣结构的实验研究

重点研究了不同碱度和ωAl2O3水平条件下MgO对炉渣流动性和熔化性温度的影响。结果表明，在梅钢高炉炉渣碱度R2≤1．20，ωAl2O3≤15．5％的条件下，控制MgO在8％～10％的水平即能实现炉渣良好的流动性能。     

高炉炉渣流动性的实验研究

以宝钢高炉渣中的四大组元(CaO,SiO2,Al2O3,MgO)为基础,实验研究MgO,Al2O3含量及碱度对炉渣的熔化性温度和流动性的影响.结果表明,炉渣中Al2O3含量控制在16%,配制适量的MgO(9%～10%),在1 500℃以上的高温区域,炉渣仍能保持正常的流动性,适合炉缸温度充沛的高炉使用;MgO含量由6%增加到10%时,较明显地降低了炉渣粘度,粘度的递减值约为0.07～0.15 Pa.s.     

炉渣成分对COREX铁水脱硫效果的影响

 COREX熔融还原炼铁工艺具有污染小、能耗低、对冶金焦的依赖性低等优点,但存在着铁水中硫质量分数高的问题。为了提高COREX 3000工艺的脱硫效果,针对炉渣中w(CaO)/w(SiO2)、w(MgO)及w(MgO)/w(Al2O3)等指标对脱硫效率的影响进行了研究和实践。通过渣铁耦合试验研究了炉渣成分对脱硫效率和渣铁间硫分配比的影响规律,优化调控炉渣成分并得到适宜的炉渣成分范围。比较两种碱性氧化物对脱硫效率的影响程度,应当优先调整炉渣二元碱度至1.20～1.35,随后是炉渣的MgO质量分数,同时还要兼顾w(MgO)/w(Al2O3),适宜的w(MgO)/w(Al2O3) 为0.80～0.90。     

高铝炉渣熔化性温度的研究

由于矿石资源的变化,武钢高炉炉渣中Al2O3含量从原来的14%左右上升到16%左右,渣型结构发生了很大的变化。通过对高炉高Al2O3炉渣熔化性温度的试验研究,分析了炉渣中MgO含量、Al2O3含量及二元碱度RO对炉渣熔化性温度的影响以及配加CaF2后熔化性温度的变化。结果表明:Al2O3含量每增加1%时,炉渣熔化性温度平均提高4.4℃;MgO含量对熔化性温度的影响不大;二元碱度RO每增加0.05时,炉渣熔化性温度平均提高8℃;在炉渣中配加了CaF2后,Al2O3含量的变化对炉渣的熔化性温度影响较小。     

碱度和Al2O3含量对高炉渣性能的影响

以鞍钢高炉渣为基础,在实验室条件下研究碱度、Al2O3和MgO含量对炉渣粘度和熔化性温度的影响,确定了鞍钢高炉合理的炉渣成分范围为：碱度R2 1．05—1．10,Al2O3含量小于14％,MgO含量8％-10％。     

包钢7号高炉渣黏度和熔化温度的试验研究

以包钢7号高炉渣为原料,通过配加分析纯试剂SiO_2或CaO,研究了不同碱度对高炉渣黏度和熔化温度的影响,研究结果表明:随碱度的升高,熔化性温度先降低后升高,当碱度R_01.14后又呈现降低趋势;熔化温度随碱度的升高而升高,当碱度增大到R_0=1.17,熔化温度呈现降低趋势;恒温黏度(1 500℃),在试验碱度范围内变化不大,为0.26 Pa·S左右;高炉渣最佳碱度为R0=1.08。     

威钢高炉炉渣成分的合理选择

合理的炉渣成分使高炉顺行，炉渣粘度适宜，脱硫能力增强，但是较高的MgO炉渣，使炉渣物性变差，导致高炉顺行变差，炉渣粘稠，脱硫能力下降，铁水合格率下降，威钢正确选择物性较好炉渣成分后，高炉顺行，铁水的一级品率和合格率都得到提高。     

济钢高炉炉渣性能的研究与应用

以济钢现场高炉渣样为基准，通过调整炉渣中二氧化硅、氧化钙、氧化镁、三氧化二铝的质量分数，在实验室研究了三氧化二铝、氧化镁的质量分数和二元碱度对炉渣的熔化性温度和炉渣粘度的影响，从而确定现有原燃料条件下对高炉冶炼最有利的炉渣中三氧化二铝、氧化镁的质量分数和二元碱度。     

COREX熔化气化炉风口回旋区的分形研究

以COREX熔化气化炉物理模型为基础,对高速摄影仪记录的回旋区颗粒运动情况进行分析得到模型观察面上回旋区的颗粒速度场,运用分形方法对回旋区内不规则边界的表面积进行研究。结果表明：不同条件下,回旋区内表面边界的分维数变化不大;回旋区内表面积随着风量的增大而增大,当吹气量由106 m3/h变为122 m3/h时,回旋区表面...     

A brief consideration about PCI of COREX melter-gasifier

By analyzing the thermal and burden structure conditions inside the melter-gasifier of COREX process,the advantage and disadvantage of PCI into the melter-gasifier are clarified.The influence of PCI on the running condition inside the furnace is analyzed based on the information from production operation and mathematical and physical simulations,and measures to tackle with the problems arising from PCI are proposed.The main results are as follows.①Due to the unfavorable conditions for coking of coal in t...     

影响熔化气化炉风口回旋区因素的物理模拟

以COREX实际尺寸和操作参数为基础,假设回旋区内只有气、固两相,根据相似准则建立了COREX熔化气化炉模型用以研究回旋区.实验采用聚乙烯粒子作为模型的填充物料,并用红色粒子作为示踪粒子,研究了回旋区的形成过程;通过颗粒速度场确定的回旋区边界,分析了风速、排料速度(焦炭燃烧速度)、料层高度等因素对回旋区大小的影响.     

攀钢高炉渣成分对炉渣性能影响的研究

针对攀钢炼铁生产情况,在实验室进行了TiO2、Al2O3、MgO及碱度对高炉渣性能影响的试验研究.根据试验结果优选了几种较佳的炉渣成分,为攀钢选择合适的造渣制度,改善高炉技术经济指标提供了依据.     

Research needs; slag properties and chemistry

The fraction of new steel being produced from scrap increases. Tramp elements coming in by scrap have to be removed from steel melts. The composition of iron melts as a product of smelting reduction processes demands further desulphurization. The removal of sulphur, as well as silicon and phosphorus, from iron melts by treatment with soda ash is considered. Studies on the phenomenon of slag foaming have been conducted to determine the relative importances of the influencing factors. Investigations on the chemical and thermophysical properties of mold fluxes have to be intensified.     

COREX熔融气化炉热模拟研究

以不同配矿，配煤方案和鼓风条件，研究了熔融气化炉熔炼过程产生的煤炭汉化床，海绵铁金属化率，煤质，炉渣碱度和成分，下料速度，燃烧强度，炉缸热量等对冶炼过程和铁水质量的影响。     

Solid-state amperometric sensor for the In-situ monitoring of slag composition and transport properties

Open-circuit potential (OCP) measurements with zirconia-based sensors have been used for several decades in the metals industries to determine the oxidation state of high-temperature melts. Although amperometric techniques are known to provide additional kinetic and compositional analysis of the system, they have not been utilized by the metals industries to the same extent. In this work, three different amperometric techniques were examined to monitor high-temperature slags by utilizing zirconia-based sensors. Applied direct current (DC) potential steps and impedance frequency sweeps at fixed applied DC potentials were shown to clearly distinguish between slags having the same oxidation state but different quantities of FeO _x in low concentrations. The techniques were also shown to reveal information on the transport properties, slag structures, dissociable oxide type, and buffering capacity of the slag to a given oxidation state. The third technique, coulometric titration, was shown to easily differentiate between slags containing different quantities of FeO _x in larger concentrations. The ion-selective membrane properties of the zirconia allowed the coulometric titration to proceed at current efficiencies near 100 pct. This may be useful in developing technology for the recovery of metals from oxide waste streams.     

COREX熔融气化炉炉缸流场研究

COREX是目前应用最多、最成功的熔融还原炼铁工艺,也是唯一实现工业化生产的熔融还原炼铁工艺.与高炉炉缸相同,COREX熔融气化炉炉缸的工作状况也是影响其寿命的关键.因此,对炉缸内铁水流场进行分析是十分必要的.本文采用FLUENT对炉缸内铁水流动状态进行数值模拟与分析,得到了一些因素对铁水流场的影响规律:死料柱沉坐与浮起对流场影响较大,浮起时,通过炉底的铁水流量明显增加,对炉底的冲刷增强,但减少了对炉缸侧壁以及“象脚”部位的冲刷侵蚀;死料柱孔隙度越小,炉缸侧壁和炉缸底部无焦区铁水流速越大, 炉缸侵蚀越严重;适当减小出铁口直径,能有效降低侵蚀速度;此外出铁口角度对铁水流场影响较小.