The process of spheroidization

Spheroidization is to introduce the cast of a certain chemical composition of small additions of magnesium alloy in the form of mostly FeSiMg with calcium (Ca) and elements of the group of rare earth (RE), such as as cerium (Ce) and lanthanum (La). This process changes the structure and crystallization of graphite cast iron ball to produce a casting with significantly better properties. The most commonly used method of spheroidization are: flooding, Sandwich, Tandish, Inmold and PE - using cored wire. Depending on the method, type and quality of the mortar yield of magnesium ranges from 30 to 80%, with the addition of mortar in a row, 1-1,6%. Scope Mortar SFERO MG5RE is intended for use by flooding, Sandwich and Tandish in small tanks or by Inmold in forms flood plains, and the silicon content in iron at a level between 0.5% and 1.5% sulfur to 0.025%. Reduced magnesium content makes it a better bioavailability and reduces the vehemence of the reaction. Addition of cerium and lanthanum reduces harmful elements desferoidyzujących and pollutants from lower quality scrap. Granulation 5-35mm. Mortars and MG11RE SFERO MG8RE high strength, are intended for cast iron in larger tanks, or in conditions of high carbon content, making it difficult dissolution of magnesium. They are designed to spheroidization method for the casting, the silicon content in iron at levels from 0.9% to 1.8% and sulfur within the limits of 0.01-0.04%. Higher magnesium content helps to reduce energy consumption of a mortar and a larger allowance RE increases the efficiency of reaction and also reduces its violence and pollution. Mortars are supplied as standard in the granulation 5-35mm for use in a regular tub, and 1-10mm for the larger, more slender vessel. SFERO MG30RE wire in the form of hose (PE), built with a steel casing filled with reactant TKZ. alloy flux-cored wire. Sferoidyzator in this form is designed for automatic dispensing equipment and automated large foundries, is characterized by the dimensional stability and chemical composition of its entire length. As an active mortar contains magnesium in a compound without Mg2Si pure form of magnesium, which may be harmful, dangerous and even explosive. Sferoidyzator as such ensures high accuracy and repeatability of the process, low exhaust emissions and the possibility of lower production costs due to lower unit costs at the same time the percentage of magnesium and its higher bioavailability of this form (PE).

Transport and storage

Mortars in granular form are packed in 25kg bags, and shipped in bulk packages at 1000kg. Mortar in the form of wire supplied on steel racks in the horizontal and vertical rolls weighing from 1 to 2 tons. The whole is protected by a foil or PP fabric from moisture and dirt. Storage of these materials should be done in a dry place, preferably in a closed, heated and ventilated warehouse, the risk of moisture and contaminants can cause oxidation of magnesium and a significant decrease in the effectiveness of the mortar.

Special characteristics:

• The calcium content at the appropriate level you can control the speed of reaction of magnesium and lower the violence.
• Increased content of RE assisted reaction of magnesium and reduces harmful elements desferoidyzujących, as oxygen, sulfur, tellurium, selenium, titanium and impurities from the inferior quality of scrap.
• The presence of cerium, with its high boiling point, substantially reduces the vehemence of the reaction, the emission of gases and dust. At the same cer is also a potent and well sferoidyzatorem binds Pb and Sb.
• Controlled titanium content of less than 0.5%, reduces the risk of magnesium binding during the reaction, improves the reliability and effectiveness of the process.
• A special technique of ultrafast crystallization causes an increase in the participation of magnesium in its best form Mg2Si. Achieved at the same uniformity and even distribution of reactant phase enables improved process repeatability and ensure spheroidization high yield of magnesium.