Product Description
Ferrosilicon 72 is an alloy composed of silicon and iron in specific proportions. Primarily used as a deoxidizer and alloying additive in steelmaking, it also finds applications in casting, mineral processing, welding rods, light metal industries, and as a reducing agent for smelting certain metals. It is produced by smelting in electric furnaces using coke, steel scrap, and quartz (or silica sand) as raw materials.
Common silicon iron grades contain 72% or 75% silicon. Beyond silicon and iron, its chemical composition includes aluminum, calcium, phosphorus, sulfur, manganese, chromium, carbon, and other elements.

Core Functions
Steel Deoxidizer
Rapidly removes oxygen from molten steel, enhancing steel purity and quality while reducing defects in finished steel products.
Inoculant and Alloying Agent
Used in gray cast iron and ductile iron production to promote graphite precipitation, minimize white mouth defects, achieve more uniform casting microstructure, and improve casting formability.
Reduced Production Costs
Compared to other high-cost alloy additives, Ferrosilicon 72 offers outstanding cost-effectiveness. It helps steelmakers and foundries significantly reduce raw material expenses and energy consumption while boosting production efficiency.
Enhanced Material Properties
Its addition strengthens the strength, hardness, and toughness of steel and castings, making products more wear-resistant and impact-resistant, thereby extending their service life.
Primary Application Fields and Case Studies
1. Steel Making Industry
This represents the core application of Ferrosilicon 72, suitable for the smelting of various ordinary carbon steels and low-alloy steels. It serves as a primary deoxidizer, rapidly purifying molten steel.
Adding Ferrosilicon 72 during ordinary carbon steel production replaces traditional deoxidizers, reducing deoxidation time by 20% and increasing molten steel purity by 15%. This reduces raw material costs by 80 yuan per ton of steel while minimizing surface defects like porosity and inclusions, boosting finished product pass rates from 92% to 98%.
2. Foundry Industry
Widely used in gray iron and ductile iron casting production, it serves as a inoculant to refine casting microstructure and enhance quality.
Automotive component foundries producing cast iron parts like engine blocks and chassis brackets incorporate our Ferrosilicon 72. Post-implementation, it effectively reduces white cast iron phenomena, yields more uniform cross-sectional structures, and boosts toughness by 30%. This addresses customer challenges of brittleness and deformation, meeting automotive components' high-strength demands.
3. General Casting Production
Suitable for producing various mechanical components, pipe fittings, valves, machine tool bases, and other castings, ensuring stable casting quality.
A hardware foundry replaced expensive inoculants with Ferrosilicon 72 when manufacturing water pipe valves and mechanical brackets. Without compromising product performance, raw material costs decreased by 25%, casting yield increased by 7%, and the products' wear resistance and corrosion resistance met industry standards, earning recognition from downstream customers.
About Us
We are a professional ferrosilicon manufacturer equipped with advanced crushing and grinding production facilities and a comprehensive quality inspection system. From raw material procurement to product shipment, we maintain strict quality control throughout the entire process to ensure every batch meets industry standards. We offer customized products tailored to specific customer requirements. Additionally, we provide one-stop supply services and comprehensive after-sales support to help businesses reduce production costs and enhance operational efficiency.
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