论文部分内容阅读
(一) 在湿法炼鋅工厂中,清除硫酸鋅溶液中砷銻,多半是采用硫酸铁来进行的。溶液中的铁,大都是呈亚铁的形式存在,还需要利用氧化剂(錳粉、高锰酸鉀)氧化成三价铁,这样才能使鉄在所要求的pH值(5.2±)范围內沉淀完全,否则将会影响电解时的电流效率。但是利用高錳酸鉀成本太高,而且锰粉不純,合有杂质,增加渣率,如錳存于溶液中过多时,也会影响电流效率。如果用空气中的氧作氧化剂来氧化溶液中亚铁,則是最经济而省事的一种方法,在苏联炼鋅工厂中已成功地应用到生产中。在氧化过程中銅起着重要作用,其他如空气消耗量、溫度、溶液pH值、硫酸鋅的浓度,Fe~(++)和Fe~(+++)离子的浓度,沉淀物的存在对亚铁的氧化速度,都有密切的关系。根据一般理論的說法,空气氧
(A) In the wet zinc smelting plant, removal of arsenic and antimony in the zinc sulfate solution is mostly carried out by using ferric sulfate. Iron in solution, mostly in the form of ferrous iron, also needs to be oxidized to ferric iron with an oxidizing agent (manganese powder, potassium permanganate) in order to precipitate 鉄 within the desired pH (5.2 ±) Complete, otherwise it will affect the current efficiency of electrolysis. However, the use of potassium permanganate costs too high, and the impure manganese impurities, impurities, increased slag rate, such as manganese in solution too much, it will also affect the current efficiency. If the oxygen in the air as an oxidant to oxidize ferrous solution, is the most economical and easy way, in the Soviet Union zinc smelter has been successfully applied to the production. Copper plays an important role in the oxidation process. Other factors such as air consumption, temperature, solution pH, zinc sulfate concentration, Fe ~ (++) and Fe ~ (+++) ion concentration, Ferrous oxidation rate, are closely related. According to the general theory of the saying, air oxygen