本文研究了粗制硫酸锌生产硫酸锌的工艺,粗制硫酸锌因含有铜、砷、铁、镉等杂质,且硫酸含量高,导致产品滞销,由粗制硫酸锌精制可产出符合工业级标准的硫酸锌产品。主要考察了中和工艺、氧化除铁砷工艺、置换除铜镉工艺。In this paper, ...本文研究了粗制硫酸锌生产硫酸锌的工艺,粗制硫酸锌因含有铜、砷、铁、镉等杂质,且硫酸含量高,导致产品滞销,由粗制硫酸锌精制可产出符合工业级标准的硫酸锌产品。主要考察了中和工艺、氧化除铁砷工艺、置换除铜镉工艺。In this paper, the technology of producing zinc sulfate from crude zinc sulfate was studied, crude zinc sulfate contains copper, arsenic, iron, cadmium and other impurities, and the high content of sulfuric acid, resulting in unsaleable products, refined from crude zinc sulfate can produce industrial-grade zinc sulfate products. The neutralization process, Iron and arsenic removal process by oxidation, removal of copper and cadmium by displacement process were investigated.展开更多
It is important to remove the impurities, such as copper and cadmium, from leaching solution in zinc hydrometallurgy. To improve purification efficiency, a replacement-column purification device was proposed and its m...It is important to remove the impurities, such as copper and cadmium, from leaching solution in zinc hydrometallurgy. To improve purification efficiency, a replacement-column purification device was proposed and its mass transfer characteristics and purification efficiency were experimentally studied. The results show that purification efficiency increases with the decrease of the zinc powder diameter and decreases with the increase of solution velocity. If appropriate structure and operation parameters are used, it is possible to make purification efficiency more than 99%, but the diameter of zinc powder should be larger than 0.45 mm. For the velocity of 0.05-0.7 cm/s, mass transfer coefficient kc is in the range of 3.94×10-7-2.76×10-6 m/s, and increases with the decrease of zinc powder diameter and the increase of solution velocity. Moreover, it can be derived by mass transfer correlations of Sherwood number:Sh=0.1069Re0.5Sc0.33, for 0.3<Re<6.展开更多
文摘本文研究了粗制硫酸锌生产硫酸锌的工艺,粗制硫酸锌因含有铜、砷、铁、镉等杂质,且硫酸含量高,导致产品滞销,由粗制硫酸锌精制可产出符合工业级标准的硫酸锌产品。主要考察了中和工艺、氧化除铁砷工艺、置换除铜镉工艺。In this paper, the technology of producing zinc sulfate from crude zinc sulfate was studied, crude zinc sulfate contains copper, arsenic, iron, cadmium and other impurities, and the high content of sulfuric acid, resulting in unsaleable products, refined from crude zinc sulfate can produce industrial-grade zinc sulfate products. The neutralization process, Iron and arsenic removal process by oxidation, removal of copper and cadmium by displacement process were investigated.
基金Project(Y2010-1-005)supported by the Collaborative Fund of Hunan Nonferrous Metals Holding Group-Central South University,China
文摘It is important to remove the impurities, such as copper and cadmium, from leaching solution in zinc hydrometallurgy. To improve purification efficiency, a replacement-column purification device was proposed and its mass transfer characteristics and purification efficiency were experimentally studied. The results show that purification efficiency increases with the decrease of the zinc powder diameter and decreases with the increase of solution velocity. If appropriate structure and operation parameters are used, it is possible to make purification efficiency more than 99%, but the diameter of zinc powder should be larger than 0.45 mm. For the velocity of 0.05-0.7 cm/s, mass transfer coefficient kc is in the range of 3.94×10-7-2.76×10-6 m/s, and increases with the decrease of zinc powder diameter and the increase of solution velocity. Moreover, it can be derived by mass transfer correlations of Sherwood number:Sh=0.1069Re0.5Sc0.33, for 0.3<Re<6.