The commonly used purification methods before casting aluminum ingots

Views: 32     Author: Shenyang New densen Casting & Forging Co.Ltd     Publish Time: 2017-02-16      Origin: Shenyang New densen Casting & Forging Co.Ltd

The commonly used purification methods before casting aluminum ingots

Due to the electric tank of liquid aluminum zhongyou many impurities, so it is necessary to filter before casting aluminum ingots.

It is understood that the commonly used way includes: first, the solvent in solvent purification method is used to participate in the solution, the solvent has a small density, activity, adsorption ability, etc.After the adsorption solution of oxide, constitute a new droplet reaches the surface.After cooling form scum.Remove the scum can cast aluminum ingots.In the second.Chlorine gas purification, commonly used chlorine, nitrogen or nitrogen gas mixture, is a kind of primary aluminium purification method.


(1) the chlorine gas purification.Pass into the aluminum liquid chlorine gas generated many fine bubbles, abundant mixing in liquid aluminum, the hydrogen dissolved in it, and some mechanical inclusions, can be adsorbed on the small bubbles.Followed the bubbles rise to the surface of a liquid aluminum and discharge.

(2) the nitrogen purification method.Due to the chlorine gas toxic, and capital is higher, so the nitrogen purification presented.Use the alumina ball filter medium (418 mm).N2 directly into the liquid aluminum.Liquid aluminum successively into purification furnace, after alumina ball filter layer, nitrogen was, so the non-metallic inclusions in aluminum liquid and dissolved hydrogen to root out, and then after discharge, making fine uniform distribution of nitrogen bubble in have the effect of purification in the disposal of the liquid aluminum.


(3) the mixed gas purification method.Use a mixture of chlorine gas and nitrogen gas to purify liquid aluminum, its effect is on the one hand to take off hydrogen and oxide separation, on the other hand to remove some metal impurities (such as magnesium) in the aluminum, the structure of the commonly used 90% nitrogen + 10% chlorine.Also have choose 10% chlorine + 10% co2 + 80% n2.This effect is very good, carbon dioxide can make excellent dispersion, chlorine and nitrogen can shorten operation time.

Above is about casting aluminum ingots before the introduction of commonly used purification methods, the company should according to actual needs, choose the suitable purification method.

  • Q Are you a manufacturer or a trader?

    We have our own foundry ,forging factory and machinery shop located in Liaoning Province, China.
  • Q What can you do for customer?

    One Stop Service
    1).Manufacturing and supply various machinery parts.
    2). Technical analysis and design 
    3).Factory audit, on-site production supervision, in-time feedback, pre-shipment quality inspection
  • Q How could you commit the product quality?

    1) all our factories were ISO certified. 
    2) more than 50% of New Densen’s products were sold to worldwide top 500 companies 
    which located in North American, Western Europe, and Japan.
    3) New Densen’s QC engineers will do on-site supervision and before EX-work quality inspection. New Densen will issue inspection reports for customers’ approval before EX-work. New Densen will be responsible for its reports and every parts no matter how long sold to customers.
  • Q How long shall we get the quotation?

    Processing time for inquiry: 1-3 working days.
  • Q What's the process of developing a new steel casting product?

    The procedure for new project develop as below:
    1. Technical department analyze the drawings all details 
    2.Pattern design and manufacture
    3.Casting Process
    4.Quality Control inspect the casting parts
    5.Issue inspection report for customer to check quality
    6. After inspection report approved, Logistics Department help arrange the shipping to customer