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Dolochar as a reductant in the reduction roasting of iron ore slimesSwagat S.Rath,Danda Srinivas RaoInstitute of Minerals and Materials Technology,Council of Scientific & Industrial Research摘 要:The present investigation examines the viability of dolochar, a sponge iron industry waste material, as a reductant in the reduction roasting of iron ore slimes......
the asymmetry film is modified uniformly with a dense inner layer and a porous sponge outer layer.关键词:......
uniformly with a dehse inner layer with few detectable pores and a porous sponge outer layer with the pore size about 5μm,there was an obvious across section and the average thickness of each layer was about......
material with interconnected porous structure was prepared by the impregnation technique using organic polyurethane sponges as template. The influences of pretreated sponge, dipping time length, pore......
氯化钯制备过程中赶硝工艺的研究 郑雅杰1,王勇2,张钦发3 (1.中南大学冶金科学与工程学院,湖南,长沙,410083;2.大冶有色金属公司,湖北,黄石,435000;3.株洲工学院包装与印刷学院,湖南,株洲,412008) 摘要:研究了以Pd(NH3)2Cl2作原料,用水合肼还原成金属钯,王水溶解钯制备PdCl2的工艺,着重研究了采用MxOy+HCl复合赶硝剂对降低PdCl2产品中NO3-含量和赶硝过程中NO2生成的影响.结果表明,加入MxOy可大大降低PdCl2中NO3-的含量,当每公斤海绵钯加入7L(1:1)王水,在30℃左右溶解后加入1L浓HCl和1.5L MxOy(35%)时,......
二氯二氨合钯用氧化法制备氯化钯的研究 郑雅杰1,王勇2,张钦发3 (1.中南大学冶金科学与工程学院,湖南,长沙,410083;2.大冶有色金属公司,湖北,黄石,435000;3.株洲工学院包装与印刷学院,湖南,株洲,412008) 摘要:研究了以二氯二氨合钯为原料,用盐酸溶液加热溶解使其转化成氯钯酸铵,以氯酸钠作为氧化剂氧化除去铵,氢氧化钠沉淀钯得到纯氢氧化钯,再用浓盐酸溶解之并浓缩结晶得到纯氯化钯的制备工艺.研究结果表明:当每公斤Pd(NH3)2Cl2的氯酸钠用量为2.48kg,HCl(36%)用量为2.75L,钯的浓度为20g/L,氧化时间60min,氧化温度100℃,沉钯Ph=10......
College of Building Materials, Hengyang 421008, China) Abstract: The palladium alloy nanowire arrays were electrodeposited on the surface of highly oriented pyrolytic graphite by successive three.... The palladium alloy nanowires synthesized in systems of Pd-Ni ammonia coordinates or Pd-Ag ammonia coordinates containing high ammonium ion concentration are apt to not only codeposite the Pd-Ni or Pd......
) Abstract: By using sodium sulfite as reductant and Cl- and composited halogen ions as catalysts, selenium and tellurium were recovered and gold, platinum and palladium were captured from precipitated.... The results show that the reduction rates of selenium, gold, platinum and palladium are 100.0% and the reduction rate of tellurium is 97.7% when Cl- concentration is 1.1 mol/L,reaction temperature is 85......
by conducting a mass flow rate analysis using the STAN program.The results show that considerable amounts of gold, silver, cobalt, palladium,and copper could be recovered.This will reduce the amounts......
%. Therefore, it can be easily recovered to produce sponge iron, realizing zero-emission of chromium residue.Key words:carbon ferrochrome; potassium chromate; two-stage roasting; chromium residue; zero......
