登录

双语推荐:含钒尾渣

针对有毒的提钒尾渣含钒年排放量巨大、无法综合利用的问题,研究含钒回收的过程机理。SEM分析结果表明,提钒尾渣中的集中赋存于赤铁矿相(Fe_2O_3)和铁板钛矿相(Fe_2TiO_5)中,同时也有一部分赋存于Si锥辉石相(NaFe(SiO_3)_2)中;钢中的则主要赋存在硅酸二钙、硅酸三钙、铁酸钙相中和自由氧化物。根据四价和五价具有碱溶性的特性,得出提钒尾渣中92%的和钢中94%的是碱溶性的。通过温度和碱浓度对含钒物相的影响实验得知,温度对硅酸盐相的破坏作用显著,碱浓度与硅酸盐相的分解率呈线性增加的关系。通过NaOH介质水热过程分解含钒,的浸出率高于90%。
At present, the emission amounts of toxic vanadium tailings and vanadium-bearing converter slags are enormous, and the vanadium-bearing slags cannot be utilized synthetically, the recycling mechanism of vanadium from vanadium-bearing slags was researched. SEM analysis shows that vanadium in vanadium tailings mainly exists in Fe2O3 and Fe2TiO5 phases, also, some are embedded in acmite phase (NaFe(SiO3)2). And, the vanadium in converter slags mainly shows in Ca2SiO4, Ca3SiO5, Ca2Fe2O5 phases and freedom oxides. According to the tetravalent and pentavalent vanadium with alkali-soluble property, it is inferred that above 92%vanadium in vanadium tailings and 94%vanadium in vanadium-bearing converter slags are alkali soluble. Through the influence experiments of temperature and alkali concentration on vanadium-bearing slags phase, it can be obtained that the decomposition of silicate is affected obviously by temperature, and the regulation of silicates decomposition rate with alkali concentr

[ 可能符合您检索需要的词汇 ]

钒渣钠化焙烧过程低价氧化不充分,不能被浸出,降低了钒渣的浸出率。实验采用蒽醌磺酸钠(ADA)和栲胶作载氧体实现氧的传递,强化低价的氧化行为。通过X射线衍射、扫描电镜、紫外光谱以及紫外可见漫反射光谱等检测方法,分析了转炉钒渣浸出反应前后物相变化行为,探索了反应过程机理,证实了其可行性。结果表明,采用ADA和栲胶作载氧体,能将转炉钒渣中的低价氧化成可溶的高价,实现空气催化氧化高效浸。此时,浸出率由89.47%分别提高到92.84%和93.64%,且催化剂对体系后续工艺没有不良影响,转炉钒渣中的尾渣含钒量由1.1%分别降至0.52%和0.47%。
Low valency vanadium produced in the insufficient sodium roasting process affects the improvement of vanadium leaching rate. Anthraquinone-2,6-disulfonic acid disodium salt (ADA) or tannin as oxygen carrier was added into the water leaching process to transfer oxygen and to strengthen the air oxidation process of low valency vanadium. Phases of reaction system were analyzed using XRD, SEM, UV and UV-Vis DRS. The reaction mechanism of the process was also studied to prove its theoretical feasibility. Low valency vanadium was effectively oxidized by ADA or tannin, and vanadium leaching ratios increased from initial 89.47%to 92.84%and 93.64%, while vanadium contents in the leaching residue reduced from 1.1%to 0.52%and 0.47%, respectively. It also proved that catalysts had no negative effect on the consequential process.

[ 可能符合您检索需要的词汇 ]

研究了用氯盐电解液体系从提钒尾渣经电弧炉冶炼得到的镓生铁中回收镓铁,考察了 F e2+质量浓度、电流密度、N H4 Cl质量浓度和pH对镓回收率的影响。试验结果表明:在电流密度200 A/m2、Fe2+质量浓度50 g/L、电解液pH=4、N H4 Cl质量浓度100 g/L条件下,镓回收率在85%以上,铁回收率在70%以上。
Recovery of gallium and iron from gallium-containing pig iron obtained by electric arc furnace smelting of vanadium-extraction tailings has been studied in chlorine salt electrolyte system .The effect of Fe2+ concentration ,current density ,NH4Cl concentration and electrolyte pH on gallium recovery were examined .The results showed that under the following experimental conditions of currentdensity of 200 A/m2 ,Fe2+ concentration of 50 g/L ,electrolyte pH of 4 and NH4 Cl concentration of 100 g/L ,recovery rate of gallium was more than 85% ,and recovery rate of iron was more than 70% .

[ 可能符合您检索需要的词汇 ]

上一页1下一页