Iron smelting among the most important steps is the process of carburization of iron. Among the elements present in iron, coal is the most important from the viewpoint of structure, which in turn determines all the mechanical, technological and utility castings. The quality and skills carburizer its use depends, therefore, the quality of the liquid alloy and its impact on the quality and costs of obtaining a good casting. Carburizers are made of selected carbon and graphite materials by their thermal refining, and calcining at high temperatures. In these processes, distilled undesirable components in the ash, then followed by degassing and the formation that characterized by a high degree of ordering of carbon atoms. A number of species presented in the table allows carburization of metal in all types of electric arc furnaces, induction and cupola furnaces and also optimize the technical and economic conditions of the process.

Transport and storage Carburizers are supplied in big bags on 1000kg PP suitable for mechanical handling, the customer's request may also be packed in 25 kg bags. Storage should be done in dry and ventilated place away from the access of fire. Packaging always have a clear indication as to the type of material and batch number on this basis to determine the composition and use of goods. Comments and recommendations Depending on the profile of production and equipment and foundries have developed their own experiences in composing the charge for the various species of iron alloys. However, to achieve maximum assimilation carburizer should keep the following considerations:

• 1. Carburizers as far as possible should be dosed to the bottom of the furnace with constant loads - steel scrap.
• 2. After thawing of metal and sampling, adjust the chemical composition, adding always carburizer before the addition of FeSi.
• 3. When adjusting the carbon content in the furnace or ladle metal must be pure and the slag is carefully removed before adding carburizer.
• 4. Adding carburizer the metal mirror should be carried out repeatedly adding small quantities. Too much carburizer causes the oxidation and dissolution rather than a smaller yield.
• 5. Mixing natural (inductive) or enforced during and after the addition of carburizer accelerates and improves the dissolution of carbon assimilation.
• 6. Please note that the largest carbon assimilation and the quality of metal obtained so choosing carburizer addition to the permanent charge to the melting and overheating does not correct the composition by adding carburizer the mirror metal.
• 7. Please check the temperature of liquid metal in the furnace. When he is being held between the drainpipes and has a temperature higher than 1450 ° C, the first and last trigger may be different carbon content. Then add coal to be corrected carburizer the mirror metal.