中文字幕精品无码亚洲字幕,中文字幕精品无码亚洲资源网,亚洲中文字幕无码永久在线

<td id="ywwky"><button id="ywwky"></button></td>
  • <table id="ywwky"></table>
  • <td id="ywwky"></td>
  • <li id="ywwky"></li>
  • <table id="ywwky"></table>
  • Welcome~Hunan Lujian Antimony Industry Co., Ltd
    Language: Chinese ∷  English
    Navigation:Home > English > News > Industry news >

    Industry news

    Inspection Of Zinc Ingots

    Zinc ingot supplier to share with you: according to the production method, Classification of zinc ingot
     
    (1) Electro-galvanized—Zinc produced by electrolytic process, the highest purity;
     
    (2) Smelting zinc—refined by zinc ore and other steaming methods, followed by purity;
     
    (3) Recycled zinc—also called remelted zinc, which is made by smelting waste zinc twice or more, with more impurities
     
    1 Sampling and preparation:
     
    Select a few in a batch of zinc anodes, drill zinc scraps at different locations, mix the zinc scraps, use a coarse balance to weigh three 1g samples and place them in 300ml conical flasks, each adding 1: 1 10 ml of hydrochloric acid, 3 to 5 drops of hydrogen peroxide, heat to dissolve, and boil for 2 min to remove excess hydrogen peroxide.
     
    2 Qualitative test
     
    2.1 Characterization of iron impurities:
     
    Take a test solution, neutralize it with 20% sodium hydroxide to weak acidity (pH 3-4), add 1 tsp of potassium thiocyanate (or ammonium thiocyanate), and shake well.
     
    If it contains iron impurities, the iron-forming thiocyanate complex is red. If the test shows blood red, and the color is darker, it indicates that the anode is impure. Red indicates that there are very few iron-containing impurities in the zinc anode, and the anode can be used.



    prev:沒有了 next:Oxidation of Aluminum Ingots (1)

    Navigation

    Contact us

    Contact:胡先生

    Mobile:15898458081

    Tel:0737-8824117

    Email:hq_kk@163.com

    Address:No. 102, Taohua East Road, Taohuajiang Town, Taojiang County, Yiyang City, Hunan Province

    Scan ErcodeClose
    Ercode
    中文字幕精品无码亚洲字幕,中文字幕精品无码亚洲资源网,亚洲中文字幕无码永久在线