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Iron and Steel Foundries

COMETAL products for cast iron cover the full range of needs of both grey and nodular cast iron: Ferroalloys and metals, wire treatments, in grain inoculants, GERMALLOY in mould inoculants for ductile iron, and OPTIGRAN for cast iron, nodulizers FeSiMg, CuMg or NiMg based, cleaners and preconditioners, DURRANS recarburizers, spherical and angular shots and other miscellaneous materials such a chromite sand, calcium carbide and silicon carbide, cerium Mischmetall, Calzot, etc..

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Wire treatment INFORM®

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General Features







The use of thre cored wire treatments INFORM ® from ASK CHEMICALS, involves a large number of technical and economic advantages such as:
• High homogeneity, due to accurate adjustment of conditions such as temperature and amount of iron.
• Controlled vapour detachment during the treatment, which helps to clean the casting.
• Ideal for setting the load of the treatment.
• Easy to handle.

INFORM ® treatment wire is used in ladle. Coverage of the steel wire treatment dissolves in the molten iron and dust from the filler wire is released. Should be sought that the wire INFORM ® treatment dissolves more deeply into the iron melt, required depth could be achieved with adequate speed winding.

Inoculant in Grain

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Inoculants in grain of ASK Chemicals are effective for both grey and nodular iron and are suitable for treatment in ladle and vein. They are manufactured from ferro silicon combined with different active elements that give them the most suitable characteristics for each case. Its contents in rare earths, zirconium, calcium, barium, manganese, strontium, aluminum, titanium, tin, magnesium, etc.. offer a very wide range of possibilities for iron foundries.

Mold Inoculants

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• Germalloy - Optigran Inoculants for Machine -Molded Castings.
• Germalloy - Optigran Inoculants for Medium Sized and Large Castings.

The use of cast, monolithic molds with definite analyses (Germalloy and Optigran) in the foundry has demonstrated for more than three decades that a quality improvement unattainable with any other product can be achieved as a result of the optimal inoculation effect. Inoculation in mold offers the following advantages:

• The inoculation is coordinated fairly accurately to the casting mass
• The dissolution of the inoculant occurs under air exclusion.
• The mold inoculation increases the number of graphite spheres or promotes a fine A-graphite formation for GJL.
• By raising the ferrite content is possible to develop GJS-400-15 or GJS-400-18 or GJS-400-18-LT or GJS-400-18-RT-cast state (thermal treatment processes could be saved)
•The formation of segregations is counteracted.

Nodular Pre Alloy

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The low-percentage magnesium pre-alloys are predominantly used in the overmolding method. The specified working conditions and operational requirements are decisive for the effective design of the treatment ladles and for the question of a cover for the pre-alloy filling. It can be advantageous to combine certain grain sizes and pre-alloy types. The grain size is to be coordinated to the claims of the treatment process, the treatment unit and the relevant operating conditions. Further application options are Mg treatment in the mold (see data sheet INMOLD Method) and the flow method.

• FeSiMg Pre Alloys.

Master Alloys

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Nickel magnesium treatment alloys have been used since the industrial production of cast iron with nodular graphite for the metallurgical treatment of molten iron. The specifically heavy nickel is distinguished as a magnesium carrier by a) its segregation-free dissolving capacity for magnesium (NiMg 4) and b) its relatively resistant intermetallic phase with magnesium (NiMg 15). Nickel-magnesium alloys enable a simple and targeted introduction of magnesium in molten iron from a few 100 kg up to 100 t and more, with no need for special equipment. Nickel-magnesium treatment alloys are used both at low treatment temperatures (< 1400°C) and at high treatment temperatures > 1500°C. Nickel-magnesium treatment alloys with low C content have proven to be especially effective deoxidization and desulfurization agents in alloyed steels.

The use of this special copper containing treatment alloy can be effective under certain conditions for the production of Cu-alloyed cast iron with nodular graphite.

• Ni-Mg and Cu-Mg Treatment Alloys.

Molten Iron Cleaners

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Dispersit® is a new method of metallurgical purification of molten iron. Dispersit® reduces the surface tension of the molten metal and assists the coagulation of foreign particles or reaction products, which can thus rise at an accelerated rate. In addition, Dispersit® reduces the formation of reaction product (slag) deposits on the treatment ladle, pouring ladle and pouring furnace lining. When using Dispersit ®, the addition of alloys containing Mg can be reduced during the production of cast iron with nodular graphite. For example, 1 kg Dispersit® is generally a substitute for 1 - 2 kg of a 5% FeSiMg alloy; there are corresponding empirical values when using other FeSiMg alloys. The use of Dispersit® is often successful in reducing the scrap rate caused by dross and inclusions by over 50%.

• Dispersit.

Preconditioning of molten metal

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COMETAL offers the ASK Chemicals treatment agents for casting preconditioning before the Mg treatment. The addition of Cerium leads to the formation of Ce-O-S compounds that are stable under atmospheric conditions in the temperature range from 1450 to 1550°C. Ce-O-S compounds cannot be altered by atmospheric oxygen. Cerium oxysulfides are very fine (approx. 1 – 3 μm), round in shape and remain suspended in the molten metal owing to their high specific gravity (approx. 6.5 g/cm³). They boost the heterogeneous nucleation catalysis. The formation of dross is countered through the removal of oxygen and sulfur in the base iron by introducing cerium before the magnesium treatment.

If Cerium Mischmetall is not introduced with a pre-conditioning alloy, the use of cube-shaped pieces of cerium misch metal is suitable. Cerium misch metal is also used for modification of the graphite in the cast iron in order to achieve cast iron with vermicular graphite or compact graphite.

• Cerium Mischmetall
• Silicon Mischmetall
• FeSiBa.
• CeBa 22.
• VL (Ce) 2.

Steel Shots

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COMETAL supplies high quality steel shot . The technology of cooling by water used to manufacture these grits allows the maximum possible temperature gradient between the furnace and the cooling process, thus represents a clear improvement over the conventional system of air cooling. Steel particles fall into water whose temperature and chemical composition are controlled, the temperature of the steel particles falls dramatically and this causes a strong metallurgical structure in the particle of the grit, wherein the carbon and iron atoms are arranged the most optimal and regular shape.

The fine metallurgical structure with homogeneous tempered martensite, gives each particle the highest possible resilience, extending its life in blasting situations, while still transmitting a high energy.

Shots, marketed by COMETAL, have an specific heat treatment process for each grade. This means that each tempering furnace, treats particles of the same size, and thus produces an accurate and thorough heat treatment, through each individual particle, which gives an optimum and consistent hardness. This contrasts sharply with other procedures to obtain grits in which particles of different sizesare processed simultaneously in the furnace .

• Steel Shot & Grit Brochure
• Amamix Shots Brochure
• Ferroblast Shots Brochure
• Automotive Shot Peening
• Aerospace Shot Peening

Recarburizers

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The production of cast iron and steel has a high demand of carburization. The DURRANS recarburizers are the result of more than 150 years of experience which have made us able to offer high quality products that are tailored to the individual needs of our customers. The end result is a broad spectrum of high technology products in our portfolio. A key feature of our recarburizers portfolio is to provide our customers what they exactly need.

We are also able to meet exact weight requirements of our customers and deliver our products in almost any packaging unit.

Based on petroleum coke:

PREMCO (Graphite):

• PREMCO EG
• PREMCO SG
• PREMCO 10
• PREMCO 30
• PREMCO 40
• PREMCO 50

CARBOSTEEL:

• CARBOSTEEL


Based on
metallurgical coke:

CARBON 90:

• CARBON 90


Based on anthracite:

CARBON CA:

• CARBON CA


Based on
pitch coke:

PROCARB:

• PROCARB SG
• PROCARB LS
• PROCARB 99

 

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