Calcium Silicon Casi Alloy

Introduction:

Calcium Silicon Casi Alloy is a highly sought-after product in the global market. It is a compound made of calcium, silicon, and other elements. The alloy is widely used in steelmaking and foundry industries due to its exceptional properties. It has a high melting temperature, good fluidity, low viscosity, and remarkable desulfurization ability. These qualities, combined with its affordability, make it a popular choice for manufacturers worldwide.

Composition:

Calcium Silicon Casi Alloy is mainly composed of calcium and silicon elements, but it may contain trace amounts of other elements such as Aluminum, Iron, and Titanium, depending on the manufacturing process. The composition of the product determines its properties, making it an essential consideration for customers.

Applications:

Calcium Silicon Casi Alloy is a versatile product that can be used in several industries. The primary application is in the steelmaking industry, where it is used as a deoxidizer, desulfurizer, and alloying agent. The alloy removes impurities from the molten steel and helps in improving its quality. The addition of Calcium Silicon Casi Alloy reduces the overall production cost and improves the durability of the final product. Furthermore, the product is applicable in the foundry industry for the production of cast iron and other alloys.

Properties:

Calcium Silicon Casi Alloy has several properties that make it an attractive option to customers worldwide. The product has a high melting temperature, which allows it to withstand high temperatures during the steelmaking process. Additionally, the alloy has a low viscosity and excellent fluidity, which makes it easy to use. The most remarkable property of Calcium Silicon Casi Alloy is its desulfurization ability. The addition of the product reduces the sulfur content in the steel, which improves its overall quality.

Advantages:

Customers who choose Calcium Silicon Casi Alloy enjoy numerous benefits. Firstly, it is an affordable product that is readily available in the market. Secondly, it is a reliable product that guarantees consistent quality, which is essential in the manufacturing industry. Thirdly, the product can be customized to meet the specific needs of the customer.

Packaging and Shipping:

We take great care in packaging and shipping our products to ensure that they arrive at their destination in excellent condition. The product is packaged in 1-ton jumbo bags, which are then loaded onto pallets for tidy and secure transportation. We have a dedicated team that handles the shipping process to ensure timely delivery of the product.

Conclusion:

Calcium Silicon Casi Alloy is a valuable product that has numerous benefits to customers. Its unique properties, affordability, and versatility make it an attractive option to manufacturers in various industries. Our company is committed to providing high-quality products that meet the needs of our customers. We guarantee timely delivery, personalized customer service, and competitive pricing. Choose our Calcium Silicon Casi Alloy and enjoy the exceptional quality and reliability that comes with it.

Calcium Silicon

CaSi alloy is compound alloy which is composed of silicon, calcium and ferro. It is an ideal compound deoxidizer and desulfurizer which can be used in the production of many kinds of steel such as rail steel, low carbon steel, stainless steel and other special alloy like Ni base alloy and titanium base alloy. CaSi alloy also can be applied as the heatraiser in convertor steelmaking workshop and as the inoculant or additive in producing cast iron and nodular cast iron. Our Calcium Silicon owns many advantages as follows.

1. Si and Ca can be controlled as needed.
2. Pulverization and deliquescence resistance.
3. less impurities such as C, S, P, Al.

Besides, we can offer other specifications such as Ca10-15%,Ca 20-30% Si40-50%, in one word, we can wholly meet your requirement.

Case Study

Background
A specialty steel mill in Pohang, South Korea, producing high-grade bearing and gear steels, faced persistent customer rejects due to elongated manganese sulfide (MnS) inclusions and sporadic nozzle clogging during continuous casting. Despite using conventional aluminum deoxidation, the steel lacked sufficient calcium treatment to modify non-metallic inclusions. The mill introduced Calcium Silicon (CaSi) Alloy to resolve these quality constraints.

Challenge
The mill's prior practice used only ferrosilicon and aluminum for deoxidation. This resulted in high-alumina (Al₂O₃) inclusions, which are hard and angular, causing:

Nozzle clogging in 14% of heats, leading to casting interruptions.

Poor machinability and fatigue life in the final bearing rings.

Inconsistent impact toughness, especially in large-section bars.

Calcium was absent from the inclusion engineering strategy, leaving sulfides in their undesirable elongated form rather than globular, harmless shape.

Solution
After a ladle metallurgy furnace (LMF) trial, the mill adopted Calcium Silicon (CaSi) Alloy with the following specification:

Ca 28–31%, Si 55–60%, Al ≤1.5%, C ≤0.5%

Particle size: 10–50mm (for ladle addition)

Addition method: Wire feeding (cored wire, 13mm diameter) to ensure deep calcium dissolution without excessive fuming

Implementation
The CaSi cored wire was injected during the final 8 minutes of ladle refining, at a feed rate of 2.5 m/s. Target calcium addition: 0.025–0.035% in liquid steel. After wire feeding, soft argon stirring was maintained for 12 minutes to promote inclusion flotation and modification.

Results (6-month production data)

Nozzle clogging reduced from 14% to 2.3% of heats, improving casting productivity by 11%.

Inclusion rating (ASTM E45) : Alumina-type (B) inclusions dropped from 2.5 to 0.8, while globular sulfides (Type C) became the dominant form.

Impact toughness (Charpy V-notch at -40°C) increased from 27 J to 42 J, exceeding customer specification.

Steel cleanliness index (by SEM/EDS) showed complete transformation of Al₂O₃ into liquid calcium aluminates (C12A7), which do not clog nozzles.

Economic impact
Annual savings from reduced casting interruptions: €340,000. Lower rejection rate (from 5.1% to 1.7%) added €510,000 in recovered product value. CaSi cored wire cost increased moderately, but net benefit after six months exceeded €620,000.

Conclusion
Calcium Silicon (CaSi) Alloy, when applied via cored wire with precise calcium control, is highly effective for inclusion modification in clean steel production. The South Korean mill now standardizes CaSi treatment for all bearing and gear steel grades. For steelmakers targeting high fatigue life and castability, CaSi remains an indispensable tool.

Why choose us?

• Our products are ideal for use in various applications and industries.
• By formulating corporate talent development plans, we plan to introduce needed talents, actively cultivate, create conditions, and set up a stage to fully display their personal talents.
• We can provide technical datasheets and specifications for our products.
• We are looking forward to becoming one of your most reliable suppliers.
• Our company follows ethical business practices and values customer satisfaction.
• Leading technology has not only created the world-class high quality of our Calcium Silicon Casi Alloy, but also become the source of our advantages in quality, scale, brand and marketing.
• We provide excellent support for technical questions and product information.
• Our company is committed to a full range of business such as R&D innovation, production improvement and sales promotion for all types of Calcium Silicon Casi Alloy.
• Our products are of superior quality and are highly recommended by our customers.
• We continue to build a professional team while allowing employees to receive tangible economic benefits, thus creating a corporate atmosphere of being in the same boat.

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