煤焦油固定床催化加氢工艺实验

为提高煤焦油化产率,降低煤焦油沥青含量,在实验室中研究分析了煤焦油固定床催化加氢工艺,确定了催化剂种类、催化加氢最佳温度、加氢压力、加氢反应时间,煤焦油经过加氢处理后,煤焦油中萘含量高达19.8%,加氢产物中的沥青产率仅为32.3%。     

煤焦油固定床催化加氢工艺实验研究

在实验室中研究分析了煤焦油固定床催化加氢工艺,研究确定了催化剂种类、催化加氢最佳温度、加氢压力、加氢反应时间,煤焦油经过加氢处理后,煤焦油中萘含量高达19.8%,加氢产物中的沥青产率仅为32.3%。     

催化氧化酸浸法处理锌精矿的研究

本文概述了催化氧化酶浸法处理硫化锌精矿的结果．采用催化氧化酸浸（100℃,400KPaA）－和氧化除铁－锌粉置换除铜镉－碳酸铵（或碳酸氢铵＋氨水）沉淀碱式碳酸锌的全湿法新工艺可生产一级减式碳酸锌,催化氧化酸浸之锌浸出率为95％．所得产品经新技术──等离子热分解可获得超细活性氧化锌。也可将所得硫酸锌溶液净化后用于锌电积,获得符合标准要求的电积锌。     

氧化或氨氧化催化剂

本发明公开了一种用于丙烷或异丁烷的气相催化氧化或气相催化氨氧化的氧化物催化剂，其包含以特定原子比含有钼（Mo）、钒（V）、铌（Nb）和锑（Sb）作为组成元素的氧化物，所述氧化物催化剂的还原率为8％～12％，比表面积为5～30m^2／g。还提供了一种用于高效生产该催化剂的方法。     

纳米Ni-Mo/氧化石墨烯催化剂及其制备方法

正专利申请号:CN201510746216.7公开号:CN105289636A申请日:2015.11.03公开日:2016.02.03申请人:广东工业大学本发明公开了一种纳米Ni-Mo/氧化石墨烯催化剂及其制备方法;旨在提供一种分散均匀,稳定性好,具有优良的加氢脱硫催化效果的催化剂;其技术要点:所述的催化剂为活化后的氧化石墨烯表面负载纳米镍粒子和纳米钼粒子;属于催化剂技术领域。     

长坑金矿选矿工艺试验研究

长坑金矿矿石属于以黄铁矿为载体的次显微结构难选难浸金矿石。对该矿矿石进行了浮选、催化预氧化-氰化、焙烧氧化-氰化、碱浸预氧化-氰化等工艺试验研究,为选矿工艺方案的确定指明了方向。     

污水中痕量银的催化动力光度测定法

催化动力学法测定银的指示反应多为配位体取代反应与氧化还原反应,而通常以利用氧化还原反应作指示反应的催化动力学法的灵敏度和重现性较好。Mueller依据过硫酸钾—对氨基苯磺酸—乙二胺反应体系所建立的催化动力学法,其灵敏度高达1×10~(-3)μg/ml。笔者在实验中发现当有乙二胺存在的碱性介质中,痕量银可强烈地催化过硫酸铵氧化还原型酚酞,据此,我     

煤气中羰基硫脱除研究现状与展望

概述了脱除煤气中羰基硫的方法,总结比较了一些脱除羰基硫较好的加氢或水解催化剂和吸附剂的研究现状及其存在的问题。并对未来发展趋势作了分析预测。指出多元复合金属氧化物吸附剂是今后发展的趋势,它集加氢、水解催化转化和吸附煤气中各种硫化物为一体,可实现工业应用。     

Rh/C催化剂的制备及其催化性能研究

以RhCl3.3H2O为前驱体,活性炭为载体,采用浸渍法制备了Rh/C催化剂,并使用场发射透射电镜对催化剂进行了表征。同时考察了制备条件对Rh/C催化剂在6-羟基-3,4-二氢异喹啉-2-甲酸甲酯-3-甲酸乙酯加氢反应中催化性能的影响。     

YBa2Cu3O7-δ催化氧化甲苯

利用高温超导材料 YBa2 Cu3 O7-δ对氧的呼吸作用进行了空气气氛中甲苯的深度催化氧化的研究。实验表明 ,随着温度的升高和空速降低 ,YBa2 Cu3 O7-δ对甲苯的深度催化氧化活性增加。     

卡尔多炉处理锌氧浸渣及中浸渣工艺的研究

介绍了卡尔多炉搭配处理锌氧浸渣及中浸渣生产工艺,利用氧浸渣中硫代煤或焦,可自热闪速熔炼,能耗低,熔炼烟气SO2浓度可直接制酸,由于只有氧化阶段,没有还原阶段,制酸烟气SO2浓度是稳定的,不需SO2部分冷凝,制酸是连续的,为锌浸出渣的处理提供了一种节能环保的清洁生产工艺。     

混合煤气发生炉在长钢无缝钢管厂的应用

长钢无缝钢管厂采用混合煤气发生炉，提高了热能利用率，减少了环境污染。综述了混合煤气发生炉的结构、原理、操作等。     

烟台煤气厂配型煤炼焦试验

烟台煤气厂现用协庄煤和洼里褐煤配合炼焦制气，变炭的粉焦率高达３０％￣４０％，本文叙述了通过配型煤炼焦方法降低粉焦率的试验情况。     

台车连续炉生产镍铁金属化球团的实验研究

介绍了一种利用台车连续炉,以红土镍矿为原料,煤粉为还原剂,生产镍铁金属化球团的方法。通过对正交实验结果分析,得到可用于实际生产的工艺参数。工业实验结果表明,内配碳量是影响球团金属化率的最重要因素,但过多内配碳量带来的残余灰分会降低产品球团的品位,因此以碳氧比1．3为宜;采用一定的盖碳保护措施可以有效防止球团氧化,抑制球团金属化率的降低;考虑成本因素,流程时间不宜过长,球团在还原段的时问以24h为宜。     

发展煤油铁大循环经济

分析了现阶段煤、油、铁循环经济的特点和状况,指出了用焦炉煤气生产甲醇存在的问题.为此,提出了一种新的煤、油、铁循环模式,即以非炼焦煤生产煤制气,用于制造甲醇,而将节省的大量焦炉煤气用于生产直接还原铁,既节省能源,又降低生产成本.     

Towards coal based continuous steelmaking Part 2 – Low carbon to ultralow carbon steel

Abstract

Low carbon steel produced continuously from powdered coal and iron ore fines in a circuit employing three melt circulation loops is subjected to countercurrent contacting with argon in a packed bed at 100 mbar pressure. New generalised correlations are developed for both gas and liquid phase mass transfer in liquid metal irrigated packed beds. Consideration is next given to the likely rate controlling mechanisms. Data reported in the literature are reassessed to demonstrate that liquid phase transfer predominates and interfacial chemical kinetics is unlikely to exert a major influence on the process for producing ultralow carbon (ULC) steel. Although liquid phase diffusion of oxygen is clearly more important, gas phase mass transfer at 100 mbar must still be taken into account. Calculations indicate that 2 000 000 tpa Fe requires a ULC tower with an internal diameter of 2·6 m packed with 6·5 m of 150 mm ceramic balls, for example.     

煤-氧-水蒸气-焦炉气联合气化制备直接还原气

进行煤-氧-水蒸气-焦炉气联合气化制备直接还原气或液态燃料合成气的工艺概念设计，并对其关键技术进行热态模拟的基础研究。结果表明，借用高炉炼铁系统可望实现煤-氧-水蒸气-焦炉气联合气化制备H2／CO可调、有效成分H2 CO大于95％的富氢还原气或化工合成气，为解决直接还原炼铁以及液态燃料合成的原料气指出了一条可能的途径。     

The rate of reduction of iron oxides by carbon

The rate of reduction of Fe₂O₃ and FeO by coconut charcoal, coal char and coke, in an inert atmosphere within the temperature range 900 to 1200°C was investigated. The effects of pressure, particle size, and the amount of carbon were determined. The results indicate that the reaction takes place by means of the gaseous intermediates CO and CO₂, and that the overall rate is controlled by the oxidation of the carbon by CO₂. The rates of reduction of FeO and Fe₂O₃ by CO are relatively fast, and the CO₂/CO ratio for the oxidation of carbon is determined by their equilibria. The reduction of Fe₂O₃ by carbon is accomplished in two stages, with FeO forming first. The reduction of Fe₂O₃ to FeO is faster than that of FeO to Fe because its CO₂/CO equilibrium ratio is higher and hence the rate of oxidation of carbon is faster. A direct comparison was made between the rate constants for the reduction of FeO by carbon and those for the oxidation of carbon in the appropriate CO₂-CO gas mixtures, and they are in good agreement. Apparently the iron formed by the reduction does not significantly catalyze the oxidation of carbon; whereas for the reduction of NiO by carbon, the Ni formed does catalyze the oxidation of carbon.     

Evaluation of a New Process for Ironmaking: a Productivity Model for the Rotary Hearth Furnace

In order to address the key issues of capital costs and CO₂ emissions in ironmaking operations, a new process was proposed combining a Rotary Hearth Furnace (RHF) and a Bath Smelter. This paper describes the construction of a productivity model for the RHF based on previous studies concerning the reduction behaviour of pellets of carbon and iron oxides. The model was used to estimate changes in RHF productivity according to the type of carbon used in the RHF pellets, numbers of layers of pellets, final metallization degree of the direct reduced iron (DRI) produced, and initial sizes of the pellets. The results indicate that productivity gains between 33 and 46% can be achieved replacing coal with wood charcoal, a carbon source virtually free of net CO₂ emissions. Also, the productivity of the RHF can be doubled by reducing the charge only up to 70% metallization. The model allows the study of changes in overall energy consumption due to changes in the extent of primary oxidation of the gas at the pellet level showing that the use of wood charcoal increases the total amount of carbon consumed by less than five percent relative to operations with coal.     

RA330合金的耐高温腐蚀性能

RA330合金是镍铁铬系耐热合金,用于制作煤气加热炉隔热墙。在850℃,连续运行2 160h后,通过分析其表面氧化模式,研究了其在高温下的腐蚀性能。结果表明,其与煤接触表面主要是煤灰分形成的熔盐腐蚀,氧化膜不完整,表面形成蚀坑;与煤气接触表面主要是高温氧化腐蚀,氧化膜较完整,硫腐蚀不明显。