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Fundamental Study for Removal of Copper from Iron Scrap.

从废铁中去除铜的基础研究。

基本信息

批准号：
06650844
负责人：
SASABE Minoru
金额：
$ 1.28万
依托单位：
CHIBA INSTITUTE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1994
资助国家：
日本
起止时间：
1994 至 1995
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650844/
关键词：
molten iron iron scrap removal of copper refining chloride reaction rate 鉄スクラップ銅

项目摘要

When the iron scraps such as automobile scrap, etc. were treatment, the so-called tramp element such as Cu was not removed by oxidative refining. consequently, the tramp elements were accumulated in steel by the repeated recycling and the amount of recycling is limited. Therefore new refining process have been demands except for oxidative refining. Possibility of removal of copper from molten iron by using FeCl_2 is experimentally examined in a small size experimental apparatus. In this study, it was tried that iron is not chlorination, while copper alone is exhausted to the outside as a gas of chloride.FeCl_2 powder is injected with the mixture gas of nitrogen and oxygen into molten iron and copper alloys. The removal of copper from molten iron can be achieved by using FeCl_2. The reaction rate can be written as an apparent first order reaction for the copper contents. Compared to the case of nitrogen alone, an apparent rate constants is increased 3 times.It is considered that the partial pressure of FeCl_2 is lowered, because, it is diluted by a carrier gas methods.Therefore, FeCl_2 is charged in molten iron by using plunger method. The reaction rate can be written as an apparent first order reaction for the copper contents and its apparent rate constants is somewhat similar to that of the carrier gas method. When a small amount of Fe_2O_3 and FeCl_3 are added to FeCl_2, the rate constants is increased 4 times. That is to say, when FeCl_3 and an oxygen source added to FeCl_2, it is approximately 12 times as compared with the case of FeCl_2 alone.Rate determining step of the reaction is estimated as diffusion process of copper in the molten metals.

在处理汽车废铁等铁屑时，没有通过氧化精炼去除铜等所谓的杂质元素。因此，不稳定元素通过反复回收在钢材中积累，且回收量有限。因此，除了氧化精炼外，还需要新的精炼工艺。在小型实验装置上对FeCl_2脱除铁水中铜的可能性进行了实验研究。在这项研究中，尝试了铁不氯化，而铜单独作为氯化物气体排出到室外。将FeCl_2粉末与氮气和氧气的混合气体注入铁水和铜合金中。用FeCl_2去除铁水中的铜是可行的。对于铜的含量，反应速率可以写成表观一级反应。与单氮的情况相比，表观速率常数增加了3倍。认为载气法稀释了FeCl_2，降低了FeCl_2的分压。因此，用柱塞法在铁水中充注FeCl_2。对于铜的含量，反应速率可以写成表观一级反应，其表观速率常数与载气法的近似。当FeCl_2中加入少量Fe_2O_3和FeCl_3时，反应速率常数提高4倍。也就是说，在FeCl_2中加入FeCl_3和氧源时，与单独加入FeCl_2时相比，大约增加了12倍。反应的速率决定步骤估计为铜在熔融金属中的扩散过程。