DING Yin-gui
,
WANG Jing-song
,
WANG Guang
,
MA Sai
,
XUE Qing-guo
钢铁研究学报(英文版)
The feasibility of paigeite ore treatment with iron nugget making process is proved. The isothermal reduction experiments at laboratory scale were carried out, using carbon bearing pellets which were made of boron containing iron concentrate and pulverized coal mainly, from 1623 to 1723 K with different heating time. The results indicated that iron nugget making process depends mainly on heating time and temperature. And the iron nugget and slag can separate in a clean manner at 1673 K for 15 min. For the iron nugget, the C content is 357% (mass percent) and B is 0065% (mass percent). The B2O3 content of slag is 2001%, and the boron was concentrated into one phase which is identified as suanite (Mg2B3O5) during the solidification. With an extraction ratio of 80% under the atmospheric conditions, the activity of boron in slag is good. The boron-rich slag can be used to extract boric or boric acid and alleviate the shortage of boron resource. Through series of calculation and analysis related, it can be concluded that the recovery ratio of Fe and boron are about 98% and 97% respectively. The results show that this method is feasible and effective on the utilization of paigeite ore.
关键词:
boron containing iron concentrate
,
carbon bearing pellets
,
iron nugget
,
boron-rich slag
丁银贵，王静松，马赛，王广，薛庆国
钢铁
采用以铁精粉、煤粉和石灰石为主要原料制成含碳球团，在1573、1623、1673K下进行了不同加热时间的还原试验研究，并分析计算了炉料带入硫的去向。试验结果表明：在温度为1673K、12min时，渣铁已经能够很好的分离。所得珠铁中碳、硫的质量分数分别为3.53%和0.17%，珠铁的内部组织结构主要由珠光体和渗碳体组成。渣中以硅酸钙(CaSiO3)和硅酸二钙(Ca2SiO4)为主，含有少量的钙镁橄榄石(CaMgSiO4)和玻璃体。计算得知：炉料带入的硫中24.61%进入渣、61.91%进入铁、13.48%进入空气。
关键词:
含碳球团
,
iron nugget
,
slag
,
sulfur
