Catching slag, Covering agent for copper alloys | Japan Casting Enginnering(JCE).

Casting flux

Catching slag, Covering agent for copper alloys

The following are common problems faced
by customers when casting with copper and copper alloy.

  • I want to cleanly remove the slag that has emerged!
  • Straw ash is hard to source, so I want a substitute!
  • The slag is viscous and can not be removed!
  • I want to stop the slag when tilting the furnace!
  • The charcoal sizes are uneven!
  • There are many impurities in the charcoal!
  • I want to use a suitable covering material!

The above are by far the most frequent cases at casting sites.

Japan Casting EngineeringCatching slag, Covering agent for copper alloys

From long ago, straw ash has been used as a slag removal agent (flocculant) when dissolving copper alloy. However in recent years, due to environmental issues this straw ash is gradually becoming difficult to source. But our company’s slag removal agent displays better effectiveness than straw ash, and we manufacture a product tailored to the copper alloy.
Regarding industrial charcoal, we were burning charcoal at the time of our founding, and we take advantage of that experience to deliver high-quality products.
We also manufacture high-quality covering materials as substitutes for charcoal.

About slag removal agent

The condition of slag after adding the slag removal agent

You can just scrape it off as it is! You can even let it flow into the mold as it emerged!

In the metal dissolution process impurities of oxidized metal (slag) are generated.
This slag causes product failures in the next step, the casting process.
In addition, slag can have a variety of different properties depending on the alloy, such as being viscous, dry, or solidified into dumpling shapes.
Our company manufactures slag removal agents tailored to these slag properties, and it is possible to cleanly remove impurities.

Effect and use of Slag removal agent

Effect Remarks
Removal of slag that has emerged At the time of copper alloy dissolution, scum (slag) oxidized by the metal emerges, but this product is used to scrape it clean before it flows into the mold.
Stopping slag when tilting the furnace When tilting the furnace to pour the molten metal into a mold, often slag also passes through into the mold along with the metal. At such times, floating slag removal agent while pouring stops the slag.
Solidify viscous slag Depending on the additive elements, slag can be sticky and hard to remove.
At such times, spraying this product on as a flocculant causes the slag to solidify and become easy to remove.
Straw ash substitute Straw ash is used in various situations, but this product fulfills the role of a substitute.

About industrial charcoal

About industrial charcoal

Charcoal can become a completely different product depending on the material carbonized, carbonization temperature, and firing time.
From over a thousand years ago, it has been said that with steel you can not make a good product with bad charcoal, but this can also be said of modern metal dissolution.
The main reasons why charcoal is used in the dissolution of copper and copper alloy are for control of the atmosphere and preventing oxidation.
Our company makes the most of our know-how gained by producing powdered coal from the time of our founding, to provide good charcoal.

Our company’s industrial charcoal

  • Small size

    Small size

  • Medium size

    Medium size

  • Large size

    Large size

The effects and applications of industrial charcoal

Effect Remarks
Preventing oxidation It not only alleviates contact with the atmosphere, it forms a weak reducing atmosphere to prevent the oxidation of molten metal.

About covering material

covering material

There are various implications for coverings.
Preventing oxidation, heat insulation, atmosphere control…it is nearly the same as the use of charcoal, but it is used in various places where charcoal can not be used, such as places where a higher covering effect than charcoal is desired, for prevention of contamination by impurities, or in places you want to keep warm throughout the day, etc.
where you want a higher-quality covering.

Problems with charcoal and commercially available coating materials

Problem1 With a charcoal coating, a gap can be created and combustion may be rapid.
Also, commercial coating materials often contain sulfur (S) the arch enemy of copper alloy.
Problem2 Both have low weak reduction performance, and even if covered, large amounts of slag engulfing ingots occur.
Problem3 Commercially available coating materials do not spread with molten metal.

Covering materials that solve these problems are manufactured by our company.

At our company, we have over 30 varieties of coating materials that solves the various problems listed above. We can suggest products that can be used anywhere including melting furnaces, troughs, tundishes, etc.,finely classified by alloy and price range, so please feel free to contact us.

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