Y.Z. Lan
,
S. Zhang
金属学报(英文版)
Based on the characteristics of graphite ore from Panzhihua district, the present research tried to find a new technology to increase the purity of the graphite carbon from 93% to 97%. Study was conducted on leaching agents, time, temperature, stirring speed and concentration of leaching solution affecting the process. The technological parameters chosen were: L / S=3:1, reaction time 30min, 5% concentration of sulfuric acid, reaction temperature 70℃, stirring speed 200rev/min. The results of the continuing tests with one kilogram showed that the graphite content can be increased from 93% to 97%, which reaches the requirement for high grade graphite. When waste acid from coke making is used to leach graphite, the result is also satisfactory, but the treatment of waste solution containing organic substances has to be further investigated.
关键词:
graphite ore
,
ore
,
High
,
grade
,
Chemical
,
metho
秦哲
,
廖建军
,
周剑峰
,
肖跃奇
,
仇圣桃
,
周明伟
钢铁
以CaO-CaF2复合渣系为脱硫剂,在RH精炼过程采用真空投入法进行高牌号无取向电工钢深脱硫工业试验,采用KTH模型计算分析了RH炉渣成分对硫容量Cs的影响.研究结果表明,炉渣成分控制在w((CaO))/w((SiO2))为5～7,w((CaO))/w( (Al2O3))为1.5～1.8,w((A12O3))为25％～30％,w((FeO+MnO))＜5％,脱硫剂加入量为6～8 kg/t时,钢中硫质量分数从平均0.0031％降低到0.0018％,最高脱硫率达到47.1％0,平均脱硫率为41.7％.
关键词:
无取向电工钢
,
RH
,
高牌号
,
脱硫
叶铁
,
周成
,
高振宇
金属功能材料
对高牌号无取向电工钢35W300的成品进行了第二次退火,对第二次退火后的成品性能、纵横向磁性能差异和组织变化进行了分析.结果表明,随着第二次退火温度的升高,晶粒长大,磁性能优化.铁损平均值下降0.087 5 W/kg,磁感平均值升高0.008 T.第二次退火温度为820℃的产品的磁性能能够满足用户使用要求.
关键词:
第二次退火
,
箱式炉
,
高牌号
,
磁性能
王立涛
,
郑磊
,
施立发
,
张乔英
金属功能材料
doi:10.13228/j.boyuan.issn1005-8192.2017004
借助Gleeble实验机,系统研究了高牌号无取向硅钢材料的热变形行为;研究结果表明:在本实验条件下,温度由850℃升高至1 150℃时,再结晶尚未形核,试样在此温度区间内只发生了回复的过程.应变速率较低时,晶粒呈现出长条带状,而应变速率较高时,晶粒多为不规则多边形.
关键词:
高牌号
,
硅钢
,
热变形
,
加工性能
