共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
3.
采用热重分析法研究了铁含量对焦炭反应的影响规律.利用液相吸附法制备了不同Fe2O3含量的焦炭样品,通过对样品的微观分析和焦炭反应动力学的研究,阐释了铁元素对反应机理的影响.结果表明,铁对焦炭溶损反应具有正催化作用,且催化作用随铁含量的增大而加强;铁的存在降低了焦炭反应的起始反应温度和剧烈反应温度,导致焦炭过早破碎,影响焦炭强度;同时铁的存在也降低了焦炭溶损反应的反应级数和活化能.反应级数从无Fe2O3添加时的1.53级降为零级.研究表明,Fe2O3均匀分布在焦炭表面使其能提供更多的有效催化活性中心,进而对溶损反应起到催化作用. 相似文献
4.
5.
包头铁精矿球团中含有钾、钠、氟等有害元素,造成球团还原异常膨胀.而MgO可有效地降低球团还原膨胀率.采用压团、焙烧、分段还原法(Fe2O3→Fe3O4、Fe3O4→FexO、FexO →Fe),测量铁氧化物各还原阶段的还原膨胀率,采用光学显微镜及SEM观察焙烧试样和还原产物的形貌.研究结果表明,MgO促进了铁酸镁的形成,抑制了氟质量分数低的试样在Fe2O3→Fe3O4阶段的还原膨胀;但MgO抑制了铁酸钙的形成,反而促进了氟质量分数高的试样在Fe2O3→Fe3O4阶段的还原膨胀;MgO对第二阶段还原膨胀率的影响因试样中钾、钠、氟质量分数不同而有所差异;MgO抑制了铁晶须生长,降低了第三阶段的还原膨胀率. 相似文献
6.
7.
8.
灰成分对焦炭热性能的影响 总被引:10,自引:2,他引:8
通过在配煤中分别加入不同量的Fe2O3、CaO、MgO、K2O、Na2O、SiO2、Al2O3、P2O5、TiO2改变灰成分的炼焦试验,和大量的模拟生产配煤的炼焦试验。获得169组试验数据,采用回归分析的方法获得了宝钢煤源条件下,焦炭灰成分中十大主要成分对焦炭热性能影响的次序。确立了适合宝钢煤源条件的灰催化指数ACI计算方法。建立了焦炭灰成分对焦炭热性能影响的数学模型。 相似文献
9.
10.
摘要:为研究温度对含V、Ti生铁高温氧化性能的影响规律,采用静态不连续增重法绘制了氧化动力学曲线,并结合SEM-EDS和XRD检测手段,分析了含V、Ti生铁的高温氧化机制。结果表明,含V、Ti生铁的氧化增重与时间呈线性关系,900℃后氧化速率会迅速上升;高温下生成的氧化层为双层结构,表层主要氧化物为Fe2O3,外氧化层为连续的Fe2O3和TiO2的混合氧化物,内氧化层主要由V2O3组成;Ti在氧化层中扩散速率较快,随着氧化层变厚,TiO2逐渐从片层状氧化物中富集成团状。当氧化温度高于900℃后,TiO2能够破坏表层氧化物的连续性,导致含V、Ti生铁氧化层疏松脱落。 相似文献
11.
12.
13.
<正>Minmetals Resources acquired the world’s largest copper mine under construction for USD5.85 billion.One after another,listed companies Jien Nickle,China Molybdenum and Chihong Zinc and Germanium raised money to get involved in overseas mining projects…SOEs and private enterprises are engaged in a frenzy of overseas mine purchasing.A reporter with Economic 相似文献
14.
正Judging from China’s copper consumption field,the biggest consumption unit is electric power,which accounts for 47%of total consumption;it is followed by light industry sector,including household electrical appliance,machinery,durable goods and hardware etc,which accounts for 22%of total consumption;followed by transportation field, 相似文献
15.
《China Nonferrous Metals Monthly》2014,(10)
正In 2013,the Central Geological Prospecting Fund(CGPF)Project newly discovered 15 ore fields,including 3 large above ore fields,and 5medium sized ore fields.The reporter learned from the recently published"Annual Report of Central Geological Prospecting Fund Project(2013)"that,from 2006 to 2013 the CGPF 相似文献
16.
《China Nonferrous Metals Monthly》2014,(10)
正This year,the investment growth rate of real estate industry continued to slow down,sold area of commercial housing also dropped significantly,which brought huge pressure to the domestic air conditioning manufactures.In the first half of the year,by relying on high growth in national financial expenditure,along with investment in public infrastructure 相似文献
17.
《China Nonferrous Metals Monthly》2014,(10)
正Kang Yi,Honorary Chairman of China Nonferrous Metals Industry Association,said recently at the Forum on Development of the Non-ferrous Metals Industry in Central and Western China held in Zhengzhou that,as more and more electrolytic aluminum factories in Xinjiang came into operation,the electrolytic aluminum output of Xinjiang had reached2,275,000 tons in the first 7 months this year, 相似文献
18.
《China Nonferrous Metals Monthly》2014,(12)
正"Xinjiang project has been completed according to schedule,but total completion and total start of production are two different concepts,after completion it still needs a gradual process of reaching production target."On the morning of November 3,Shenhuo Coal Industry and Electricity Power told investors the above statement on the investor interaction platform. 相似文献
19.
正The reporter learned from Guangdong Province Precious Metal Transaction Center that in 2013the Center maintained healthy development momentum,and had become the second largest precious metal transaction platform in China in terms of market size;currently Guangdong is quickening steps of financial innovation for the Center,aiming to build a transaction center with international core competitiveness. 相似文献
20.
正On May 22,Baotou Rare Earth Industry Cooperation Consultation MeetingProject Agreement-signing Ceremony was held in Ningbo,nearly 40 enterprises from Ningbo,Guangdong,Hunan,and Shanxi participated in project consultation.After multi-lateral communication,agreements were signed for a total of 7 rare earth projects successfully. 相似文献