Results 51 to 60 of about 161,737 (96)
Evolution of Inclusions in Steel with 150 t LF Refining Feeding Calcium Wire Treatment
Teshugang, 2016 The evolution of inclusions in steel Q235, SPA-H and DC01 treated by feeding silicon-calcium wire and calcium-aluminium wire after LF refining in metal pretreatment-150 t BOF-ladle argon blowing-LF-CSP flowsheet and the effect of refining slag on ...
姜玉龙 +6 more
doaj
, 2011 单嘴真空精炼装置是一种新型的炉外精炼设备。采用80 t单嘴真空精炼装置进行了127炉脱碳工业试验,试验结果表明,单嘴真空精炼装置可以获得较好的脱碳效果,试验最低碳质量分数为10×10-6。主要介绍了单嘴精炼装置的试验情况,分析了钢包底吹气体流量、钢包内渣层厚度、钢包自由空间高度、脱碳时间、钢水温度及成分对脱碳效果的影响 ...
张永亮 +5 more
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, 2004 钛精矿是攀枝花钒钛磁铁矿的一种重要的二次资源,占世界钛资源储量的35%。本文采用HSC化学软件对钛精矿加碳还原过程热力学进行了计算机模拟,分析了钛精矿碳热还原的历程。通过高温碳热还原的实验,确定了该反应过程的反应速率,反应程度随温度的变化。同时分析了反应前后的相变化和微观形貌,实验结果表明可分离出反应后钛精矿中的铁晶粒 ...
李文兵, 袁章福
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, 2009 黔西北土法炼锌形成大量的废弃地，废渣重金属Zn、Pb 和Cd 全量分别为：7 521、5 365 和53.4 mg·kg-1，废渣的pH 值为8.53，当地的背景土壤的pH 值为5.39。重金属污染是当地面临的主要问题，同时也是土地复垦需要考虑的首要问题， 目前来说防止重金属的迁移扩散显得尤其必要。用优级纯硝酸调控废渣的pH 值检验pH 值降低时废渣重金属释放程度；用 碱石灰、活性炭、粉煤灰和有机质对重金属进行吸附；野外用碱石灰、纯碱和烧碱在土法炼锌区对废渣释放的重金属进行吸 附 ...
敖子强, 严重玲
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Effect of Fluxing Agent B2O3 on Melting Temperature of CaO-Based Refining Slag
Teshugang, 2009 Effects of B2O3 on melting temperature of two CaO-based refining slag series with low basicity [ ( CaO)/ (SiO2)=3 ~4] and high basicity [ (CaO)/(SiO2)= 5 〜7. 5 ] have been studied. Results indicate that B2O3is more available than Al2O3and CaF2to decrease
王宏明 +4 more
doaj
China experts' consensus on preventive and interceptive orthodontic treatments of malocclusions of children. [PDF]
Hua Xi Kou Qiang Yi Xue Za Zhi, 2021 National Health Institute of Hospital Administration，The Experts +32 more
europepmc +1 more source
Teshugang, 2015 With the process measures including KR pre-sulphurizing hot metal [S] ≤0.008% , to increase BOF preoxidizing adding aluminium amount from 0.010%-0.025% to 0.020%-0.035% , to increase adding Fe-Ca wire from 3.0 m/t to 4.0 m/t, LF refining time ≥35 min and
陈建东 +3 more
doaj
Analysis on Mottled Spots Defect of Internal Surface of Φ185mmx13mm Cold-Drawn Tube of Steel 25Mn
Teshugang, 2017 The production flowsheet for cold-drawn tube of steel 25Mn(/%: 0.24C, 0.25Si, 0.87Mn, 0.016P, 0.011S) is hot-metal pretreatment-90t EAF-LF-VD-Φ250mm round bloom HCC-piercing-hol rolling to Φ197mmx17mm tube-cold rolling to Φ185mmx13mm tube.
邓明明 +5 more
doaj
, 2018 对四氯化钛精致尾渣进行酸浸,考察液固比、盐酸用量、浸出温度、浸出时间对钒浸出率的影响,结果表明,在液固比2∶1、38%盐酸与水的体积比1.1∶1、浸出温度40℃、浸出时间30min的条件下,钒浸出率可以达到97.1%。酸浸液调节pH后,在沉钒温度40℃、酸浸液钒初始浓度小于6g/L、终点pH1.4~2.0、氧化剂用量为理论量的5~6倍的条件下,钒沉淀率达到95.4%,沉淀物550℃煅烧3h后可以得到钒酸铁。沉钒渣和废水中和渣满足GB18599 ...
张洋, 马娜, 瞿金为
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