Rare Earth Magnesium Ferrosilicon Alloy

The products containing 4%, 5% or 5.5% magnesium belong to low magnesium spheroidizing agent, whose RE content is 1%-2%, mostly melted in the intermediate frequency furnace and and used for spheroidization of low sulfur liquid iron. It reflects a mild spheroidizing reaction and the spheroidizing elements are easy to absorb. The products containing 6% or 7% magnesium belong to medium magnesium spheroidizing agent, which is generally melted in the cupola furnace combined with electric furnace, or melted in the intermediate frequency furnace for the production of pearlite heat-resisting steel. The amount of spheroidizing agent is determined according to the wall thickness of the casting and sulfur content of the liquid iron, showing a wide application range and multiple spheroidization processes. High magnesium spheroidizing agent is suitable for cupola furnace smelting with an addition amount of 1.6%-2.0% for liquid iron containing 0.06%-0.09% sulfur. Low aluminum spheroidizing agent is applicable to castings prone to subsurface pinholes and castings with aluminum content requirements in liquid iron. For spheroidizing agent made of pure Ce or pure La, the liquid iron is clearer after spheroidization treatment and rounder graphite nodules are produced.

1. Rare earth magnesium ferrosilicon alloys can be shipped in bulk, containers, bags and other forms as required. The rare earth magnesium ferrosilicon alloys are included in the IMDG Code, thus its packaging is usually included in the export inspection. For bag packaging, 25kg plastic woven bags or ton container bags are used. Special attention should be paid to the representativeness of the samples taken during the inspection of goods packed in ton bags.

2. In storage and transportation, attention should be paid to separate storage and batch management.

The current export inspection of rare earth magnesium ferrosilicon alloy is divided into two ways.

1. Lot-by-lot field inspection (batch-by-batch inspection);

2. Classification management inspection and supervision.

Rare earth magnesium ferrosilicon alloy is a gray-black solid using ferrosilicon as the raw material and adding calcium, magnesium and rare earth with an optimum collocation ratio for a steady reaction. The casting thickness of each grade of rare earth magnesium ferrosilicon alloy shall not exceed 100mm, and the standard particle sizes are 10-30mm and 15-30mm. Customers can specify special particle sizes for different uses, such as 1-4mm, 1-5mm, 5-15mm, 3-25mm, 8-40mm, and 25-50mm.

Our company produces various grades of rare earth magnesium ferrosilicon alloy spheroidizing agent for nodular cast iron, which can play spheroidization, desulfurization and degassing effects after adding to liquid iron, improve the purity of the casting liquid, react with arsenium, zinc, lead and other low melting point impurities to produce low melting point compounds that do not melt in iron, preventing interfering elements from destroying the spheroidization.