共搜索到352条信息，每页显示10条信息，共36页。用时：0小时0分0秒613毫秒
were calcined at different temperatures in a rotary tubular electric furnace. The effects of calcination temperature on the decomposing ratio of rare earth, the oxidation ratio of cerium, the stripping......
of In(Ⅲ) was investigated. The effects of volume ratio(A/O) and flow rate of the stripping mixture as well as the feed and mixture temperature on the extraction efficiency were studied. The results show that within a certain range, the effect of the temperature of the system on the extraction of In(Ⅲ) was not notable. In(Ⅲ) in the stripping phase could reach the highest enrichment when A/O was 4:1. The mass transfer rate......
制酸废催化剂回收钒王晓丹1,朱云1(1.云南省昆明市昆明理工大学材料与冶金工程学院)摘 要:用硫酸浸出-P204萃取工艺从制酸废催化剂中回收钒.结果表明,在浸出条件为硫酸浓度50g/L,液固比2∶1,时间30min时,钒的浸出率可达95%.浸出液经过P204萃取,饱和NaHCO3溶液反萃,反萃液净化,铵盐沉钒,偏钒酸铵热分解后得到了合格的V2O5.关键词:冶金技术； 钒； 硫酸浸出； 制酸废催化剂......
载金炭解吸率低原因分析及预防措施余关平1(1.福建省龙岩市上杭县紫金矿业集团股份有限公司黄金冶炼厂)摘 要:对脱金炭制成的薄片和光片进行镜下观测分析发现,碳酸盐对炭部分区域覆盖包裹和金粒镶嵌在炭孔隙中是使循环用活性炭活性下降,吸附金能力降低,载金炭解吸率低的主要原因.通过加强生产技术管理,采取相关措施,减少或避免碳酸盐包裹的生成及杂质进入活性炭,防止微细金粒夹带到解吸液进入活性炭孔隙,可有效改善循环使用活性炭的吸附金活性及提高载金炭的解吸率.关键词:活性炭； 金； 碳酸盐； 包裹； 酸洗； 金粒；......
hydrochloric acid, the leaching temperature should be 60 ℃). Because of the much lower leaching temperature, sulfuric acid leaching is preferred. The counter current extraction and stripping tests were... not extracted. The Y3+ in loaded organic can be selectively stripped using 50 g/L sulfuric acid solution and the stripping efficiency reaches 99.86% after seven-stage counter current stripping with O/A ratio......
hydrochloric acid, the leaching temperature should be 60 ℃). Because of the much lower leaching temperature, sulfuric acid leaching is preferred. The counter current extraction and stripping tests were... not extracted. The Y3+ in loaded organic can be selectively stripped using 50 g/L sulfuric acid solution and the stripping efficiency reaches 99.86% after seven-stage counter current stripping with O/A ratio......
得出相应锑的回收率,结果见表2. 图7 萃取等温线 Fig. 7 Extraction isotherm 图8 酸度浓度对反萃的影响 Fig. 8 Effect of H2SO4 concentration on stripping 表2 反萃水解法沉淀产物主要成分及锑的回收率 Table 2 Composition.... 图9 相比对反萃的影响 Fig. 9 Effect of O/A on stripping process 由图9可以看出,随着相比的减少,铁和锑的反萃溶解率略有上升,锑的溶解率维持在8.6%,铁的溶解率大于93.4%,而砷的溶解率从18.4%上升到58.3%.综合考虑,为保证一级反萃水解锑效果和维持较少的反萃液体积,按相比O/A为1:1进行后续反萃实验.为了使反萃剂的应......
. The stripping solution does not have any impurities. By adding H2SO4 to stripping solution containing Na2S2O2, SO2 gas is released and Au3+ ions could be reduced. Key words: gold; solvent extraction... include extractant, acid and chloride salt concentration on gold and impurities extraction. After impurities separation studies on extraction stage, scrubbing and stripping of organic phase were surveyed......
, and the stripping concentration of sulphuric acid is 90 g/L. Under the optimum extraction condition, the extraction rate and stripping efficiency are nearly 100% and 97%, respectively, and the co-extraction...97.4%.而单用LIX 84萃铜后,要达到相同的反萃效果需要加入160~180 g/L的硫酸[6],这表明混合萃取剂的反萃性能良好. 图8 硫酸浓度对反萃率的影响 Fig.8 Effect of sulfuric acid concentration acid on stripping rate of copper 3 结论 1) 用自主合成的高......
相为P204载铟有机相,搅拌转速为800 r/min,温度为25℃,相比(A/O)为1/2,混合时间为5 min,考察HCl浓度对铟和其中离子反萃率的影响,结果如图6所示. 图6 HCl浓度对铟,锌和铁反萃率的影响 Fig. 6 Effect of HCl concentration on stripping efficiency of In, Zn and Fe 由图6...;Stripping isotherm of indium and McCabe-Thiele diagram 2.4 P204载铟有机相盐酸反萃液萃取铟 实验用水相为P204载铟有机相在相比(A/O)为1/2的条件下,采用6 mol/L HCl反萃所得到的含铟溶液,其中含铟 7.9 g/L,锌 40 mg/L,铁40 mg/L. 2.4.1 TBP浓度对各金属离子萃取率的影响 在搅拌......
