Carbon Additives for Steel and Foundry Use

Carbon Additives for Steel and Foundry Use

Carbon additives, also know as recarburizer, carbon raiser. It is a product for increasing the carbon element (C).

During the steel making process, various factors may cause the carbon content in the molten steel to decrease. This will affect the quality of the finished steel. So, steel mills usually purchase carbon additives to increase carbon content

Main application of carbon additives

To add carbon raiser in foundry process can greatly increase the consumption of steel scrap, reduce the consumption of pig iron, or don’t even use pig iron.
Carbon raiser is mainly used in steel making. Used to increase the carbon content of steel. Carbon raiser used in high carbon steel smelting due to its high quality with few impurities.
Carbon additives can also be used in foundries. Used to reduce impurities in pig iron, thereby reducing casting costs.

There are two commonly used carburants: calcined petroleum coke and graphite petroleum coke.

Calcined Petroleum Coke(CPC)

This CPC recarburizer is produced by using green petcoke as raw material in a calcined furnace at temperatures between 1000-2000℃. This recarburizer has the properties of high fixed carbon content, low impurity gas content,rapid dissolution and high absorption rate which make it the preferred choice for carbon addition in steel making and casting foundry industry.

Model	Fixed Carbon	Total Sulfur	Nitrogen	Ash	Volatile Matter	Moisture
CK-CPC-01	98.5%	0.5%	500ppm	0.5%	0.5%	0.5%

Graphite petroleum coke(GPC)

The carbon content is usually from 98-99.5%. The sulfur content is 0.05-0.03%. Mainly used for nodular cast iron. It is characterized by fast absorption, high carbon and low sulfur.

Model	Fixed Carbon	Total Sulfur	Nitrogen	Ash	Volatile Matter	Moisture
CK-GPC-01	99%	0.03%	100ppm	0.5%	0.5%	0.5%
CK-GPC-02	98.5%	0.05%	200ppm	0.8%	0.8%	0.5%

Packing and delivery of carbon additives

Size: 60-80mesh; 80-100mesh; 100-200mesh; 200-300mesh; 0-0.5mm; 0.2-4.0mm; 0.5-6.0mm; 1-3mm; 1-5mm; 1-10mm; 25-65mm; 1-100mm.

Packing:

1) Small bag: 25kg kraft bag or PP bag

2) Big bag: 1000kg Jumbo bag

3) According to customer’s requirements.

In addition to the above two kinds of recarburizers, metallurgical coke(MC) recarburizers and calcined anthracite coke(CAC) recarburizers are also available. The specifications are as follows:

Model	Fixed Carbon	Total Sulfur	Ash	Volatile Matter	Moisture
MC	85%(max)	1%(max)	15-18%	1.2%(max)	1%
CAC	91%-95%	0.3-0.6%(max)	4-8%	1.2%(max)	0.8%

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