Ferro silicon is a key ingredient in the production of ductile cast iron. The material inoculates the iron to accelerate graphitisation, changing it from flakes to spheroidal nodules during solidification.
The CAMSIZER P4 dynamic image analyzer measures the particle size distribution of Ferro Silicon Magnesium with high accuracy and repeatability. Its Dual-Camera Technology detects fine and large particles simultaneously (Fig 1).
The report presents an overview of the Danish ferro-silicon-magnesium market and provides an analysis of its key growth and demand drivers. It also discusses all the important factors that could influence the development of this market in the medium term.
Commercially available ferrosilicon usually contains 15, 45, 75 or 90% silicon in powder form. It is added to the iron melting ladle in order to provide the required number of nuclei for eutectic solidification. It is also used as an inoculant, allowing the addition of alloying elements to improve the casting quality and/or slag properties.
Magnesium ferrosilicon is used primarily as an alloying agent for steel, providing high tensile strength at high temperatures and improved resistance to corrosion. It also increases hardness and creep strength. It is a critical raw material for many metal industries. Magnesium briquettes are used by foundries for deoxidation and alloying as well as as a source of heat in the BOF (Basic Oxygen Furnace). It is also utilised in heavy media gravity separation processes.
The company provides low price ferro silicon magnesium in various grades. Its high quality guarantees the best results in a wide range of industrial applications, from casting to foundry, and also for metal processing. It is a key material in the production of ductile cast iron. It is also used in the manufacture of steel and as a source of oxygen. It also helps to prevent carbide formation and reduces the loss of magnesium during solidification. It is also used as a noduliser in the casting process.
The global ferrosilicon magnesium market is expected to grow significantly due to the increasing construction activities in emerging economies. In addition, the growing automobile industry is expected to boost the demand for ferrosilicon magnesium. The growing number of steel industries in Europe will further escalate the demand for this product. Microtrac’s CAMSIZER P4 dynamic image analyzer is ideally suited for the particle size distribution analysis of ferrosilicon and other granular metals, including iron and magnesium. This analyzer is highly repeatable, providing high confidence in the measurement results.
Ferro silicon, also called FeSi, is an important product in the iron and steel industry. It increases yield strength and tensile strength of steel, improves its toughness at high temperatures, and enhances the intensity and coercive properties of magnetic steels.
It is produced in either a blast furnace or an electric arc furnace by the reduction of quartz sand (SiO2) with coke. The resulting mixture consists of particles of various sizes from dust-like to cm-sized chunks. The FeSi is sifted to separate the dust-like particles from the bigger chunks.
Magnesium is added to the molten ferrosilicon alloy to make it a nodulising additive for ductile cast iron. This makes the graphite in the cast iron spheroidal rather than the flake network found in gray cast iron and increases the elongation of the casting before failure. The magnesium in the nodulising additive also prevents carbide formation in the cast iron during solidification. This technique improves magnesium recovery compared to the conventional practice of plunging mag- nesian metal directly into the molten ferrosilicon bath.
For the production of nodular iron castings a magnesium ferrosilicon alloy is employed. This is a so-called “master alloy” which is added to the charge of iron in order to control the initial silicon content and to facilitate the formation of graphite nodules within the resulting cast iron. Various commercial nodulizers are available which contain magnesium and granular ferrosilicon. These nodulizing agents, however, have undesirable characteristics in that they tend to undergo particle segregation during manufacture and shipment and their effectiveness is not fully realized when used in the casting of ductile iron.
A magnesium ferrosilicon alloy for in-mold nodulization of ductile iron comprising 5-15 percent magnesium, 60-80 percent silicon, 0.1 to 1.5 percent calcium, 0.2 to 1.3 percent aluminum, 0-2 percent rare earth predominantly cerium and balance iron. The invention also discloses a process for the preparation of the above-described magnesium ferrosilicon alloy and a method for producing nodular iron castings therefrom.
Prior to this invention the usual manner of preparing such an alloy was by providing a bath of molten ferrosilicon containing about 44 to 50% Si and adding magnesium metal by plunging, that is attaching magnesium ingots to steel bars and submerging them beneath the surface of the molten iron until they were completely dissolved. Magnesium recoveries in this manner were typically about 65 to 80%.
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