摘要
为了开发利用低品位菱铁矿，在试验室采用坩埚法作了一系列用煤还原矿石的基础试验．试验表明，铁矿石品位得到大幅度提高．在此基础上，利用海滨冶炼厂改造的12m长回转窑进行了煤基还原试验，预还原矿的品位提高到55％左右，金属化率达到60％左右．在18．6m3高炉上配加30％～50％的预还原矿后，高炉顺行，风量增加，产量提高5％～7％，焦比大幅度降低．
In order to develop and utilize low -grade siderite, a series of fundamentalexperiment of using coal to reduce ore has been conducted by graphite crucible method. Theresult shows iron ore grade increased considerably- Based on fundamental experiment, coal- based reduction test of siderite has been carried out in a 12m rebuild rotary kiln of Haibiniron works. Grade of pre-reduced ore raised to 55% ± Metal1ization rate of ore reached to60% ± With 30%~ 5O% of pre-reducenlent ore as 18. 6m3 blast furnace burden, the BFoperation improved, blast volume increased,iron output raised 5%~ 7%, coke rate reducedgreatly.
出处
《烧结球团》
北大核心
1997年第4期13-16,共4页
Sintering and Pelletizing
