共查询到18条相似文献,搜索用时 62 毫秒
1.
在介绍润磨机及润磨工艺的基础上,按照氧化球团的生产工艺标准和要求,同时参照混合硫酸渣生产氧化球团的消化经验,对润磨机的工作原理进行分析,通过比较滚动轴承和滑动轴承的优缺点以及摩擦润滑对比,指导球团厂优化选用更加合理的润滑和磨削工艺轴承。 相似文献
2.
3.
4.
硫酸渣代替部份铁精矿制备氧化球团可行性的研究 总被引:2,自引:0,他引:2
硫酸渣是一种资源丰富价廉的含铁原料,长期以来的为硫酸厂的废料排出,使环境遭受污染。我省每年有硫酸渣28万吨,衢化17万吨,杭州硫酸厂4万吨,宁波硫酸厂3.5万吨,温州2万吨,金华1万多吨,倘若能够作为炼铁原料加以利用,不仅有利于提高炼铁经济效益,而且还能解决硫酸厂废渣的排放处理,无疑会有显著的腐社会效益。硫酸渣是自身的一些特点,含铁品位低,硫和二氧化硅含量较高,还含有一些有害元素,堆比重低,成球性 相似文献
5.
6.
介绍了承德建龙钢铁公司8m^2竖炉球团生产线增加润磨工艺后。从生产过程控制、球团质量、经济效益等方面的情况,应用润磨工艺可以使铁精粉的细度(-200目)由70%下降到50%,膨润土配比降低2.5%、球团品位上升1.5%,经济效益很好。 相似文献
7.
8.
硫酸渣球团焙烧试验研究 总被引:4,自引:0,他引:4
以大冶硫酸渣为原料,配加大冶铁矿自产膨润土,通过实验室内造球和静态焙烧试验,确定硫酸渣造球的可行性。试验结果表明,硫酸渣球团在1250~1300℃的焙烧温度下,可达到厂家要求。 相似文献
9.
硫酸渣配加磁铁矿制备氧化球团试验研究 总被引:3,自引:0,他引:3
对硫酸渣配加33%的磁铁矿进行了球团试验研究,研究表明:无预处理时所得生球质量极差,润磨是改善生球质量的有效手段,在添加1.0%膨润土,润磨时间4min,润磨水分10%,造球时间10min的条件下可得到满足生产要求的生球;该生球在链篦机-回转窑模拟试验中,预热温度900℃、时间6min,焙烧温度1220℃、时间10min的条件下,可得物理强度及化学组成均满足高炉要求的球团矿,且其脱硫率高,冶金性能良好。结果证明:硫酸渣配加一定磁铁矿能生产出优质的球团矿供高炉使用。 相似文献
10.
球团配用硫酸渣的试验研究 总被引:2,自引:0,他引:2
通过对硫酸渣主要物化特性、可磨性、自然成球性、造球性能的实验室研究,发现硫酸渣经细磨后其粒度和成球性均得到显著改善.在配用细磨硫酸渣比例低于65 %时,生球、烘干球、烘烤球的各项指标基本能达到竖炉生产的要求, 成品球质量可满足高炉生产需要.硫酸渣配比继续升高时,烘烤球出现严重的爆裂现象,影响成品球团矿的质量. 相似文献
11.
模拟链篦机—回转窑工艺,研究磨矿方式对赤铁矿粉生球的预热焙烧性能。结果表明,未经磨矿处理的赤铁矿球团预热焙烧性能较差,为满足后续工序要求,生球预热温度需达到1 075℃,焙烧温度为1 280℃。高压辊磨处理对赤铁矿球团工艺条件改善效果较好,润磨次之,湿式球磨效果较弱。经高压辊磨处理后,球团制备过程中可以降低预热温度70℃,焙烧温度60℃,缩短焙烧时间2 min。赤铁矿磨矿处理能够改善球团焙烧过程中Fe2O3晶粒的发育、迁移和连接,提升球团抗压强度。矿粉比表面积和粒度组成的优化是影响球团微观结构和宏观强度的主要原因。 相似文献
12.
采用氯化焙烧工艺从硫铁矿烧渣球团中综合回收金、银、铜等有价金属,考察了造球、窑温、停留时间对金属挥发率以及物料和金属平衡的影响。结果表明,物料在1 250℃停留1.83h的最佳条件下,各金属挥发率为:Au 95.6%、Ag 52.5%、Cu 73.1%、Pb 93.9%、Zn 75.2%。球团中铜、铅、锌含量均小于0.1%,球团强度4.06.5kN。 相似文献
13.
The effect of biochar substituted for anthracite as reductant on magnetizing-roasting pyrite cinder was investigated.The key of magnetizing-roasting is the gasification reaction between reductants and CO2.Since biochar could react with CO2 more rapidly at lower temperature,the reactivity of biochar is better than that of anthracite.The gasification of biochar could produce reducing condition ofφCO/(φCO+φCO2)about 10%-20% between 700-800 ℃,which is in accord with the atmosphere and temperature of Fe2O3 reduction.So it is beneficial to the reduction of iron mineral of pyrite cinder.Compared with anthracite,biochar could decrease the roasting temperature from825 to 750 ℃ and roasting time from 20 to 15min,which shows that a better effect of magnetization could be obtained in the condition of lower temperature and shorter time.Using biochar as reductant,iron concentrate extracted from pyrite cinder as about 64%iron grade could be produced,and the recovery is over 90% under the condition of above 90% grinding particle less than 0.045 mm and magnetic intensity of 0.124-0.194 T. 相似文献
14.
《钢铁研究学报(英文版)》2016,(8):756-764
High-sulfur and low-grade pyrite cinders are the waste products of sulfuric acid manufacturing plants.Many valuable components,such as iron oxide,are contained in pyrite cinders and difficult to be separated and purified just via the high temperature roasting process.Considering this,an innovative method including water-washing,aqua regia leaching,hydrothermal alkali activation and acid-washing was developed.And the effects of different parameters on recovery efficiency of iron oxide were systematically investigated.The optimum parameters were proposed as follows:water rinse-leaching at room temperature for 5-20 min,and melting at 160 ℃ for 2.0h with NaOH(concentration of 30mass%),followed by leaching with aqua regia solution(3.0vol.%)for 1.0h.After the treatment,the content of iron oxides increased from 54.3to 96.0mass% with the recovery rate exceeding 85%.Meanwhile,calcium sulphate was recovered as the high value-added products by alkali extraction liquid.Furthermore,the phase transformation and microstructure of the samples in the process were studied by physicochemical methods to reveal the separation mechanisms of different components in the pyrite cinders. 相似文献
15.
高压辊磨强化赤铁精矿制备氧化球团的研究 总被引:1,自引:0,他引:1
以巴西某赤铁精矿为主要原料,在系统研究赤铁矿制备氧化球团特性的基础上,针对其生球强度差、焙烧温度高以及成品球强度差等问题,系统研究了高压辊磨预处理对其成球性能和焙烧性能的影响及规律,并从颗粒形貌的角度分析了影响机理.预处理后铁精矿的比表面积可达1 600 cm2/g以上,膨润土用量可降低0.75%,适宜的预热温度可降低... 相似文献
16.
17.