Calcium Silicon Composite Deoxidizer

In the global metallurgical industry, efficient deoxidation is a core process that directly determines the quality of steel and iron products. As a high-performance metallurgical auxiliary, Calcium Silicon Composite Deoxidizer has gradually replaced traditional single deoxidizers such as ferro silicon and calcium metal due to its synergistic deoxidation effect, stable performance and cost-effectiveness. It is widely favored by foreign purchasers from steel mills, foundries and other enterprises.

CaSi Composite Deoxidizer is a composite alloy material mainly composed of calcium (Ca), silicon (Si) and a small amount of iron (Fe) as the base. It is produced by smelting high-purity quartz sand, limestone, iron ore and carbonaceous reducing agents in a submerged arc furnace at high temperature (1800-2000℃), and then undergoing processes such as crushing and screening to form uniform particles. Unlike single deoxidizers, it integrates the strong deoxidation ability of calcium and the high stability of silicon, realizing "1+1>2" deoxidation efficiency in metallurgical processes.

The performance of Calcium Silicon Alloy Composite Deoxidizer is directly determined by its chemical composition and physical parameters.

Note: We can adjust the silicon calcium alloy ratio and size according to the specific needs of foreign purchasers (e.g., high-calcium grades for special steel, small-particle grades for foundries).

CaSi alloy Deoxidizer is widely used in steelmaking, foundry and other fields due to its excellent deoxidation and alloying effects. It is especially suitable for the following scenarios that foreign purchasers focus on:

1. Carbon Steel & Low-Alloy Steel Smelting

In electric arc furnace, converter and ladle refining (LF) processes, it is used as a primary deoxidizer and secondary deoxidizer:

- In the production of construction steel (Q235, S355) and automotive structural steel, it can reduce the oxygen content in molten steel to below 0.002%, significantly reducing porosity and oxide inclusions in castings or rolled products.

- For high-strength low-alloy steel (HSLA), the synergistic effect of calcium and silicon can prevent the formation of brittle phases such as Al₂O₃, improving the weldability and fatigue resistance of steel.

2. Ductile Iron & High-Quality Casting

In the production of automotive components (engine blocks, crankshafts), pipe fittings and industrial castings:

- As a nodulizer and inoculant, it promotes the formation of spherical graphite in ductile iron, increasing tensile strength by 15%-20% and impact toughness by 25% compared with traditional deoxidizers.

- Low impurity content reduces casting defects such as pinholes and shrinkage, increasing the qualification rate of castings from 85% to over 95%.

3. Stainless Steel & Specialty Alloy Production

In the smelting of austenitic stainless steel (304, 316) and heat-resistant steel:

- Precise control of silicon content improves the high-temperature oxidation resistance and corrosion resistance of stainless steel.

- Avoids the introduction of harmful impurities, ensuring the surface quality and passivation effect of stainless steel products.

Compared with single deoxidizers (fesi alloy, calcium metal) and other composite deoxidizers on the market, our SiCa alloy Composite Deoxidizer has obvious advantages, which fully meets the cost and quality requirements of foreign purchasers:

1. Higher Deoxidation Efficiency & Stability

Calcium has a stronger affinity with oxygen (the free energy of CaO formation is lower than that of SiO₂), and silicon can form a stable protective layer to prevent secondary oxidation of molten steel. The synergistic effect makes the deoxidation efficiency 30% higher than that of single ferrosilicon, and the oxygen content in molten steel is more stable.

2. Cost-Effective & Reduced Scrap Rate

Although the unit price is slightly higher than that of ferrosilicon, the consumption is reduced by 20%-25% (1 ton of calcium silicon composite deoxidizer can replace 1.3 tons of ferro silicon). At the same time, the reduction of casting defects reduces the scrap rate by 5%-8%, and the comprehensive production cost is reduced by 10%-12%.

3. Strict Quality Control & Complete Certification

Our products are tested by XRF and ICP-OES spectrometers to ensure that each batch of products meets the standards. We provide ISO 9001 quality certification, SGS inspection report and CO (Certificate of Origin), which can smoothly pass the customs clearance and quality inspection of various countries.

4. Professional Foreign Trade Services & Stable Supply

As a professional ferroalloy foreign trade enterprise, we have rich experience in global logistics. We support sea, land and air transportation, and can deliver to major ports around the world with a lead time of 15-25 days. We also provide customized packaging (1-ton bulk bags, 25kg small bags) to meet the needs of different purchasers.

1. How to Determine the Suitable Specification?

For steel mills with large furnaces (≥100t), it is recommended to choose 20-50mm particles; for foundries with small furnaces, 5-20mm particles are more suitable. For low-carbon steel production, choose low-carbon grades (C≤0.3%); for special steel, high-calcium grades (Ca≥32%) can be selected.

2. What is the Minimum Order Quantity (MOQ) and Delivery Time?

MOQ is 20 tons (1 container). For regular specifications, the delivery time is 7-10 days after receiving the advance payment; for customized specifications, it is 10-15 days.

3. How to Ensure Product Quality During Transportation?

The products are packaged in moisture-proof woven bags with inner plastic liners to prevent moisture and oxidation. We will also add anti-collision padding in the container to avoid particle breakage during transportation.
 

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