New methods of eliminating free alkali from sodium tungstate -1/3
Author:linlu    Source:Site author    Update Time:2015-12-23 20:30:31

New methods of eliminating free alkali from sodium tungstate -1/3


In tungsten smelting process, the tungsten ore alkali is decomposed to sodium tungstate. In low and middle grade tungsten raw material alkali leaching liquid, a substantial amount of free alkali often contained. To meet the requirements of the subsequent production process of solution PH value and the need of saving resources and protecting the environment, it’s necessary to separate and recycle alkali from the sodium tungstate. So in industry, inorganic acid neutralization or crystallization processing are often used to eliminate the free alkali from sodium tungstate solution. But these two kinds of methods are full of large consumption, it is necessary to seek new alkali tungsten separation method to reduce consumption and the production cost of tungsten smelting process. Next,let me introduce some new methods of eliminating free alkali from sodium tungstate.

First of all, let's take a look at how to make use of membrane electrolysis to remove the free alkali in sodium tungstate. Experiment using constant current electrolysis method in a row, electrolyte circulation by gas lift, anode high trough the material liquid and the cathode of high pure water through after the flow meter into their respective electrolyte circulation in the primary loop, with circulation of electrolyte electrolysis blend into the cell; To record slot voltage sampling and analysis on a regular basis in the process of Yang, cathode overflow liquid of alkali concentration, according to the changes of the concentration of alkali to adjust the feeding and add water to maintain the stability in anode and the cathode overflow of alkali concentration in the liquid. Using continuous operation mode is advantageous to the sodium tungstate solution membrane stability of free alkali process.

According to the experiment, in 50 to 55 ℃, under the condition of current density of 1000 a/m2. The single slot long-term stable operation, removing anode in the raw material for sodium tungstate solution 80% of free alkali, electrical efficiency of more than 88%, energy consumption is lower than 1900 Kwh/tNaOH. Three cell series operation, within 60-65 ℃, power flow density under the condition of 1000 a/m2, electric effect also on 88% to below 2250 Kwh/tNaOH energy consumption. It’s full of industrial practical value. Therefore, cation exchange membrane electric free alkali process is economically feasible. It’s stable and reliable on craft and has a good prospect of industrial application.

 

Tungsten Oxide Supplier : Chinatungsten Online - http://tungsten-oxide.com
Tel.: 86 592 5129696; Fax: 86 592 5129797 Email:
[email protected]
Tungsten & Molybdenum Information Bank:
http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version:
http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price:
http://news.molybdenum.com.cn


More details of the above news and/or products, please visit Chinatungsten Online, or contact us directly.
Disclaimer: The article is only reflecting the opinions of the author. We have no responsibility to prove the originality and authenticity of the content, words and/or pictures. You readers should just take it as reference and check the details by yourselves. And the content is not a suggestion for investment decision. The investor takes his or her own risks if he or she operates accordingly. If you have any dissent about the contents above, please contact the relevant author, or the webmaster. We will try our best to assist the dealing of the related issues. Thanks for your visit and cooperation.

ArticleInputer:linlu    Editor:linlu 
  • Back itemArticle:

  • Next itemArticle: No
  • 【Font:Small Large】【Comment】【Add favorite】【Mail this page】【Print】【Close
    Links
    China Tungsten Online Molybdenum Tungsten Wire Tungsten Bars/Rods Tungsten Bucking Bar
    Tungsten Carbides Tungsten Heater Pure Tungsten Tungsten Carbide & Alloy Tungsten Paper weight
    Tungsten Heavy Alloy Tungsten Powder China Dart Wiki of WMo Infosys
    Darts Shop Online Xatcm Tungsten Copper Alloy Metal Pricing Tungsten Carbide Jewelry
    Tungsten Alloy Fishing Sinker Darts Forum Xiamen Tungsten Tungsten Directory Link Exchange

    Add to FavoriteAbout CTIAContact UsMore LinksRecruitmentBusiness

    Address: 3F, No.25 WH Rd, the 2nd Xiamen Software Park, FJ 361008,China
    Phone:+86 592-5129696,+86 592-5129595;Fax:+86 592-5129797
    Sponsors: China Tungsten Industry Association,Chinatungsten Online
     Certified by MIIT:闽B2-20090025 闽ICP备05002525号
    Copyright © 1997 - 2015 Chinatungsten Online All Rights Reserved