共查询到20条相似文献,搜索用时 375 毫秒
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从锑精矿制备焦锑酸钠的工业试验 总被引:1,自引:0,他引:1
介绍了用空气氧化法制备焦锑酸钠的工业试验情况。以单一的辉锑矿精矿和铅锑精矿为原料,通过硫化钠浸出锑精矿使锑形成硫代亚锑酸钠进入溶液,往溶液中鼓入空气,使锑生成焦锑酸钠产品。氧化后液的主要成分为硫代硫酸钠,通过中和、浓缩和结晶,可以副产出硫代硫酸钠。该方法生产焦锑酸钠,处理的原料来源广,综合利用程度高,尤其是可以处理用火法冶炼不好处理的脆硫铅锑精矿,是我国复杂锑矿资源提高综合经济效益的一条较佳的途径。 相似文献
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三钢焦化厂捣固焦投产后,配煤结构和细度发生改变,并且高压氨水压力提高,导致焦油氨水中夹带的煤粉增多,降低了焦油氨水分离槽中的焦油与氨水的分离效果,分离后焦油中夹带水分较多。原有的焦氨分离运行管理及库区操作管理已经无法适应目前的生产工艺现状,出厂焦油的水分时常超标,对焦油产品的日常销售造成了较大的影响。通过分析导致焦油水分超标的各方面因素,从创新焦氨分离运行管理制度及库区操作管理制度入手,通过优化生产工艺操作制度,降低焦油中的水分含量,提高焦油产品的合格率。 相似文献
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二号简易焦爐投資少,建设快,焦炭質量和化学回收产品与“洋”焦爐相似,对于迅速提高焦炭質量,保証高爐充足“食粮”,减低煤耗,緩和运輸紧张情况可收立竿见影之效。目前已投入生产的二号简易焦爐也确实証明了这点。 相似文献
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振动重介质流化床细粒焦渣混合物的分选 总被引:3,自引:0,他引:3
在间歇振动流化床中研究了细粒焦渣混合物的分离。通过考察细粒焦、细粒渣及细粒焦渣混合物的入选体积量对床层密度和分选效率的影响,得出适宜的操作条件。在此条件下对细粒焦渣混合物进行了分选实验,得到了较佳的分离效率。 相似文献
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HAN Li-hao LUO Zhi-guo ZHOU Xiao-lei ZHOU Heng ZOU Zong-shu ZHANG Yu-zhu 《钢铁研究学报(英文版)》2013,20(3):30-35
The temperature distribution of COREX melter gasifier was studied by using a two-dimensional 1/30 scale thermal dynamic model. A set of operating conditions, such as radial distribution of direct reduction iron (DRI) to lump coal and coke volume ratio, coke charging location, coke charging amount and coke size, were taken into account. The results show that the temperature near the wall region decreases with the decrease of the radial distribution of DRI to lump coal and coke volume ratio. The temperature with central coke charging is higher than that without central coke column. Furthermore, the temperature significantly increases with the increase of central coke charging amount. With the increase of intermediate coke charging amount, the temperature near the wall region decreases while the temperature in the intermediate region increases. The temperature increases with the increase of coke size whether charging central coke or intermediate coke. 相似文献
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攀钢炼焦用煤面临的问题与对策探讨 总被引:1,自引:0,他引:1
对云南、四川、贵州三省、特别是攀西地区的炼焦煤资源,煤质,煤炭加工工业状况进行了全面而细致的调研,在获得大量数据的基础上,根据攀钢钒钛矿高炉冶炼对入炉焦质量要求的特殊性及煤化工公司用煤面临的问题,提出了相应的对策。 相似文献
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摘要:以同一座高炉2次休风所取的入炉焦和风口焦为研究对象,采用XRD、SEM EDS、N2吸附、热分析等方法比较分析不同样品的碳化学结构、碱金属富集程度、孔隙结构、CO2气化反应性,探究了焦炭在高炉中反应性变化程度和影响因素。结果表明:风口焦炭与入炉焦炭相比,气化反应性显著升高,比表面积增大,碳结构有序化程度升高,碱金属含量提高;金属钾在风口焦炭边部的存在形式以可溶性盐为主,在焦炭内部以钾霞石为主;入炉焦各部位差异较小,而风口焦边部、中部、芯部的气化反应性和结构性质存在显著差异,表明其各部位在高炉中所经历的气化反应过程不同;风口焦中碱金属含量为影响气化反应性的最主要因素,次要影响因素为碳化学结构和孔隙结构。 相似文献
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活性焦的热解析参数对再生活性焦的脱硫脱硝性能和机械强度至关重要。为了明确解析参数对活性焦再生过程和再生效果的影响规律,通过热解析试验探究活性焦硫残余比例、CO2和CO生成量及再生活性焦脱硫脱硝性能随解析温度和解析时间的变化规律,继而明确适宜的活性焦热解析参数。结果表明,活性焦升温解析过程中,脱硫产物在317 ℃左右迅速分解,随后分解速率下降;在进入恒温解析阶段后脱硫产物分解速率先快速下降,而后进入缓慢解析状态。硫残余比例随恒温解析温度的升高而下降,在530 ℃下解析3 h可使脱硫产物完全解析;解析温度高于430 ℃后,活性焦表面的酚基、醌基、内酯基等含氧官能团分解量明显增加,并随恒温解析温度的升高而持续增加,分解所生成的CO和CO2也随之大幅增加,这将使活性焦的孔隙结构进一步发展,继而不利于活性焦机械强度的保持;解析温度低于530 ℃时,硫残余比例随解析温度的升高而持续降低,使再生活性焦的脱硫脱硝性能持续提高;解析温度高于530 ℃后,含氧官能团分解量随解析温度的升高而持续增加,这将有利于提高活性焦表面SO2氧化反应速率,继而使再生活性焦的脱硫性能持续升高,但酚基、内酯基等酸性含氧官能团的分解使再生活性焦对NH3的吸附性能降低,进而使其脱硝性能降低。在兼顾再生活性焦脱硫脱硝性能、机械强度和生产效率等多方面因素时,430 ℃恒温解析3 h是相对较优的解析参数。在此解析条件下,再生活性焦的硫残余比例仅为1.8%,含氧官能团尚未发生大量分解,脱硫脱硝性能相对较为优良。 相似文献
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The circulation and accumulation of harmful elements in the blast furnace leads to a decrease in gas utilisation and an increase in heat consumption, which can cause the increase of coke ratio. In this paper, the effect of harmful elements on the coke ratio was quantitatively studied using the Rist diagram. The results show that the effect degree of each harmful element on the coke ratio varies. The influence orders of accumulation times and loads of harmful elements on the coke ratio are Na?>?K>Zn and Zn?>?Na?>?K, respectively. The increase of heat consumption has more effect on the coke ratio than the decrease of gas utilisation. The total increase of coke ratio by the effect of K, Na and Zn is 14.2, 35.8 and 9.3?kg/tHM, respectively, of which the effect of heat consumption accounts for 55.9, 60.9, 60.9%, respectively. 相似文献
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WANGPing LIJia-xin ZHOULi-ying 《钢铁研究学报(英文版)》2005,12(3):1-4,10
Thequalityandconsistencyofcokeisveryim portantforlargeblastfurnaces,inparticular,those withhighPCIrate,toensuregaspermeability,liq uidpermeabilityoftheburdenandsmoothopera tion[1,2].Intheblastfurnacewithoxygenenriched blastandhighPCIand/ornaturalgasinject… 相似文献
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《钢铁冶炼》2013,40(3):222-229
AbstractTwo measures for coke saving and increase in blast furnace efficiency related to coke characteristics – reactivity and size – are discussed in this paper. Modern blast furnace operation with low coke rate and high injection rate causes a change in coke quality requirements. A discussion has arisen recently about highly reactive coke. Here, a theoretical analysis of influence of coke reactivity on the thermal reserve zone, direct reduction and carbon consumption in the blast furnace has been undertaken. Experiments have been performed using non-standard test scenarios that simulate coke behaviour under real blast furnace operating conditions. Coke reactivity and microstructure have also been investigated under the impact of alkali and pulverised coal ash and char. Operation of many blast furnaces has proved the possibility of coke saving and increase in productivity when using small-sized coke (so-called nut coke) mixed with the burden, but the reasons for this phenomenon, and consequently the limit for nut coke consumption, are still not very clear. An analytical method and cold model simulations have been used to quantify the change in shaft permeability and furnace productivity when using nut coke. 相似文献