Extraction of the valuable substances from steelmaking slag in carbonic acid solution

碳酸溶液中炼钢渣中有价值物质的提取

• 批准号: 20560692
• 负责人: YOKOYAMA Seiji
• 金额: $ 3.08万
• 依托单位: Toyohashi University of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20560692/
• 关键词: 鉄鋼スラグ; 溶出; 二酸化炭素; 環境規制物質; 電気炉酸化スラグ; 炭酸溶液; 溶出試験; 放物線則; 直線則; pH; スラグ; 炭酸; クロム; 亜鉛; セレン; 環境基準; 人工海水; 淡水; 酸化鉄

Elution behavior of slags discharged from electric arc furnaces to the carbonic acid solution, which was weak acid, was investigated in order to extract the valuable substances included in the slags, The pH in the aqueous solution decreased with an increase of the partial pressure of carbon dioxide, Therefore, the elution of each substance of slag increased with the increase of the partial pressure of carbon dioxide. In the process of wet grinding of slag at atmospheric pressure of carbon dioxide, the recovery of zinc from the oxidizing and the reducing slag discharged from normal steelmaking process to the water solution was less than about 10%, whereas it for the oxidizing and the reducing slag discharged from smelting process of stainless steel was more than approximately 80%. The recovery of chromium during wet grinding was less than 1.4×10^<-4>%, and it was very small. Therefore, most chromium could be remained in the slags. Calcium carbonate was formed by the wet grinding of slag at atmospheric pressure of carbon dioxide, and it also formed in the water solution after tank leaching.

研究了电弧炉炉渣在弱酸碳酸溶液中的洗脱行为，以提取炉渣中含有的有价物质。随着二氧化碳分压的增加，水溶液的pH值降低，因此，随着二氧化碳分压的增加，炉渣中各种物质的洗脱量增加。在常压二氧化碳湿磨渣过程中，普通炼钢过程中排放的氧化渣和还原渣对水溶液的锌回收率不到10%左右，而不锈钢冶炼过程中排放的氧化渣和还原渣对水溶液的锌回收率在80%以上。湿磨过程中铬的回收率小于1.4×10^<-4>%，且回收率很小。因此，大多数铬可以留在炉渣中。碳酸钙是在常压二氧化碳下对矿渣进行湿磨形成的，也是在罐式浸出后的水溶液中形成的。

项目成果

Storage of CO_2 in Low Al_2O_3 EAF Oxidizing Slag by Grinding with Vibration Mill

振动磨粉磨低Al_2O_3电炉氧化渣中CO_2的储存

• 发表时间: 2010
• 期刊: Materials Science Forum Vol.634-636
• 作者: Muhd Nor Nik Hisyamudin;Seiji Yokoyama;Minoru Umemoto
• 通讯作者: Minoru Umemoto

Utilization of EAF Reducing Slag from Stainless Steelmaking Process as Sorbent for CO_2

利用电弧炉还原不锈钢渣作为CO_2吸附剂

• 发表时间: 2009
• 期刊: World Academy of Science, Engineering and Technology Vol.56
• 作者: Nik Hysamudin Bin Muhd Nor;Seiji Yokoyama;Minoru Umemoto
• 通讯作者: Minoru Umemoto

二酸化炭素中で湿式粉砕された電気炉スラグで調製されたモルタルの圧縮強度

电炉渣二氧化碳湿磨制备砂浆的抗压强度

• 发表时间: 2011
• 作者: Akira Matsugi;Kohsuke Suma;Akira Miyoshi;横山誠二
• 通讯作者: 横山誠二

ステンレスボールの使用による電気炉スラグへのCO2吸収の促進

利用不锈钢球促进电炉渣吸收CO2

• 发表时间: 2010
• 作者: 吉田昌弘;三島健司;他;横山誠二
• 通讯作者: 横山誠二

Absorption of CO_2 in EAF reducing slag from stainless steelmaking process under wet grinding

湿磨对不锈钢炼钢过程电炉还原渣中CO_2的吸收

• 发表时间: 2009
• 作者: Muhd Nor Nik Hisyamudin