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Description of Nodulizer

Nodulizer, also known as rare earth silicon magnesium nodulizer (FeSiMg), is an additive that can promote the crystallization of graphite into spherical cast iron. The main component of "spheroidizing agent" is nodularizing elements, such as Mg, Ce, Ca, etc.

Silicon-magnesium-iron nodulizers can significantly improve the strength of cast iron, and have the functions of degassing, desulfurization and deoxidation. Silicon-magnesium-iron nodulizers are widely used in metallurgy and steelmaking industries.

Size: 5~15mm, 3~25mm, 8~40mm, 25~50mm, or according to customer requirements.

Index Requirements of Nodulizer

Factors affecting the quality of nodulizers include: composition, particle size, shape, density, content, etc.

(1) Nodulizer ingredients are not allowed.

(2) The spheroidizing agent is pulverized, and the particle size of the alloy does not meet the requirements.

(3) The density of nodulizers fluctuates greatly, some nodulizers float up quickly, the reaction is too violent, and there is no guarantee of safety.

(4) The content is too high, the spheroidizing treatment is poor, and the amount of nodulizing agent added is too large.

(5) Fast decline after spheroidization treatment.

(6) After spheroidization, the white mouth tends to be large.

One is that the alloy production plant provides qualified products. First of all, it is necessary to improve the analysis of magnesium oxide, strictly control the raw and auxiliary materials, control the elements that promote alloy pulverization and interfering elements, and strengthen management; second, strictly implement the accurate smelting process, and control the main indicators that affect the quality of nodulizers; third, provide The particle size required by the user; Fourth, the production workers should be trained so that the workers can understand the characteristics of the alloy and the accurate method of use. Problems in production are directly related to the quality of production workers. It needs the cooperation of alloy manufacturers and users to popularize and improve the understanding of ductile iron and the level of production technology.

Application of FeSiMg Nodulizer

Rare earth ferro silicon magnesium nodularizer is mostly used in the production of ductile iron, ductile iron is a valuable high-strength cast iron material developed on the basis of gray cast iron. Due to the spherical distribution of graphite, ductile cast iron greatly reduces the splitting effect on the matrix, its mechanical properties are significantly improved compared with gray cast iron, and its comprehensive properties are close to those of steel. It is based on its excellent performance that it has been successfully used to cast some parts with complex stress and high requirements for strength, toughness, and wear resistance. Ductile iron has rapidly developed into a cast iron material that is second only to gray cast iron and is widely used.

The amount of nodulizer will affect the properties of molten iron and also affect the size and grade of the foundry. The nodularizer with a magnesium content of 4%, 5%, and 5.5% belongs to low magnesium nodularizer, it’s Re(rare earth element) content is 1% to 2%. Low content of magnesium nodularizer is mostly used in frequency furnace smelting and spheroidization of low sulfur molten iron. The advantage of this nodularizer is that the spheroidization reaction is gentle, and the nodulizing elements are easy to be fully absorbed. Nodulizer with a magnesium content of 6% to 7%, usually used in cupolas and double-smelting of electric furnaces. The high content of the magnesium modularizing agent is suitable for cupola smelting.

Low-aluminum nodulizer are used in castings that are prone to the subcutaneous blowhole, and castings that require aluminum content of molten iron.

Rare earth silicon magnesium nodularizer is also used as an additive and alloying agent in the production of steel and iron. It is used for refining, deoxidation, denaturation, neutralizing harmful impurities with low melting points, and purifying Steel by forme new metal compounds.

About the Company

Anyang Lishi Industry is a professional rare earth ferrosilicon magnesium nodulizer supplier with more than 20 years of manufacturing and trading experience. Anyang Lishi Industry can provide ferro-silicon with any particle size and content according to customer needs, and can provide customers with professional advice and preferential prices for nodulizers.