Written by the ZhenAn Team, with practical experience in ferroalloy supply, steelmaking applications, and export service
Under current cost pressure, many steel plants are reconsidering the use of silicon carbide 75 as a partial replacement for ferrosilicon. The reason is not complicated. SiC 75 can provide silicon for deoxidation, fixed carbon for reduction, and additional heat through reaction in the furnace. When the quality is stable and the addition practice is correct, it can help reduce the overall cost of steelmaking.
However, silicon carbide 75 should not be purchased only by comparing the price per ton. For steel plants, the real value depends on chemical composition, moisture, particle size, furnace recovery, and supplier consistency. A low price does not always mean low cost in actual production.
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Common Problems When Steel Plants Purchase Silicon Carbide 75
The most common problem is that buyers pay too much attention to SiC content and unit price, while ignoring the balance of fixed carbon, sulfur, moisture, and particle size.
For example, two suppliers may both offer SiC 75, but their actual performance in the furnace can be very different. One product may have stable fixed carbon, low moisture, and controlled particle size. Another may have similar chemical data on the inspection report, but contain more fines, higher moisture, or unstable sulfur. In this case, the cheaper material may lead to lower Recuperation rate, more unstable slag condition, and higher alloy correction cost.
For steelmaking, recovery is more important than the number shown on the certificate. If the silicon and carbon cannot be effectively recovered in the molten steel or slag system, the plant is not really saving money.
When evaluating silicon carbide for steelmaking, procurement teams should not only ask for SiC percentage. They should also check fixed carbon, sulfur, phosphorus, moisture, ash, and real particle size distribution after delivery. These indicators decide whether the material can perform consistently in the furnace.
Why Silicon Carbide 75 Can Reduce Steelmaking Cost
SiC 75 works mainly as a deoxidizer and reducing agent. In BOF and EAF steelmaking, silicon reacts with oxygen in the molten bath. Carbon also participates in reduction reactions. During this process, SiC produces an Exothermic reaction, which releases heat.
This heat contribution is one reason why SiC 75 can reduce cost. In an electric arc furnace, stable SiC addition may help reduce part of the electrical energy demand. In a converter, it may help maintain bath temperature and reduce the need for some heat compensation materials. The actual result depends on the furnace condition, steel grade, scrap ratio, hot metal ratio, and addition timing.
SiC 75 should not be understood as a simple substitute for ferrosilicon. Ferrosilicon is mainly used for silicon adjustment and deoxidation. SiC 75 provides silicon, carbon, reducing ability, and heat value at the same time. In many plants, the better solution is not to replace ferrosilicon completely, but to replace part of it and keep ferrosilicon for final silicon adjustment.
This combined use is often more stable. It allows the plant to reduce cost while keeping better control of final steel composition.
The Role of SiC 75 in Slag Conditioning
Another important function of SiC 75 is Slag conditioning. In steelmaking, slag condition directly affects alloy recovery, refractory wear, metal yield, and inclusion control.
When the slag is too oxidizing, FeO and MnO levels tend to be higher. This can reduce alloy recovery and increase material loss. Proper use of SiC 75 can help reduce the oxidation level of slag and improve the recovery of useful elements.
However, SiC 75 should be added according to the process condition. If the amount is too high or the timing is wrong, it may cause unstable slag behavior. If the material contains too many fines, part of it may be burned before reaching the effective reaction zone. If the particles are too large, reaction speed may become slower.
Therefore, the purchasing specification should be connected with the actual application. BOF deoxidation, EAF reduction, ladle adjustment, and slag reduction may require different particle sizes and quality control standards.
Why Moisture Control Matters
From ZhenAn's practical experience, moisture is one of the easiest ways to judge whether a silicon carbide supplier is professional.
Moisture directly affects the real usable content of the material. If moisture is high, the plant is paying for water instead of effective SiC. More importantly, wet material can affect feeding stability and may create safety risks when added into high-temperature areas.
A professional supplier should control moisture during production, storage, packing, and transportation. It is not enough to provide a clean pre-shipment inspection report. The material should remain stable when it arrives at the steel plant.
For procurement managers, moisture testing should be done on actual delivered cargo. Samples should be taken from different bags and different positions, not only from the top layer. This helps avoid judging the whole shipment by one good surface sample.
If moisture fluctuates frequently between batches, it usually means the supplier has weak control over storage, packaging, or loading. This kind of supplier may create long-term production risk even if the initial price looks attractive.
Particle Size Distribution Shows Supplier Control
Particle size is another key factor. Many steel plants specify SiC 75 as 0–10 mm, 1–10 mm, 3–10 mm, or other customized sizes. But the important point is not only the size range. The distribution inside that range matters more.
If there are too many fine particles, dust loss and oxidation loss may increase. The effective Recuperation rate may decrease. If there are too many oversized particles, melting and reaction may become slower. This can affect deoxidation efficiency and slag adjustment.
The Specific Gravity of the material also affects how it behaves after entering the furnace. Material with poor density or too much porous structure may not reach the expected reaction zone efficiently. This can reduce the actual use value, even when the chemical composition looks acceptable.
A reliable supplier should be able to control crushing, screening, dust removal, and packaging. More importantly, the supplier should be able to keep the same particle distribution from batch to batch.
For steel plants, the purchase contract should not only write "1–10 mm" or "0–10 mm." It is better to define the maximum percentage of fines and oversized material. This makes quality control measurable and reduces disputes after delivery.
How to Evaluate a Silicon Carbide Supplier
A qualified silicon carbide supplier should not only provide a quotation and a certificate. The supplier should understand how SiC 75 is used in steelmaking.
In actual procurement, the buyer should check several things together: chemical composition, moisture control, particle size distribution, packing condition, delivery stability, and batch consistency. The supplier should also be able to explain the difference between BOF and EAF use.
If a supplier only talks about price, but cannot explain fixed carbon, sulfur control, moisture testing, particle size loss, or furnace recovery, the risk is relatively high. This type of supplier may be suitable for short-term trading, but not for long-term steel plant supply.
For large steel plants, stable supply is more important than one-time low price. SiC 75 is not a material that should be purchased only by spot opportunity. Once it is included in the furnace recipe, quality fluctuation will directly affect production control.
Procurement Strategy for Steel Plants
The practical way to purchase silicon carbide 75 is to calculate the total use cost, not only the purchase price.
The calculation should include SiC content, fixed carbon, sulfur, moisture, ash, particle size, expected silicon recovery, expected carbon recovery, and possible replacement ratio for ferrosilicon. It should also consider the impact on electricity consumption, oxygen consumption, slag condition, alloy recovery, and final steel quality.
For many steel plants, partial replacement is safer than full replacement. SiC 75 can be used to reduce part of the ferrosilicon consumption, while ferrosilicon remains for precise final adjustment. This method usually gives better process stability.
Before large-scale use, the plant should run a trial by batch. The trial should record addition amount, furnace condition, slag change, silicon recovery, carbon recovery, power consumption, alloy correction, and final steel composition. After several heats, the plant can judge whether the cost saving is real.
Expert Observation for Q2 2026
For the second quarter of 2026, raw material supply stability will remain an important issue for steel plants. Price movement in ferrosilicon, petroleum coke, energy, and logistics can all affect the cost of SiC 75.
In this situation, steel plants should not only chase the lowest quotation. A more practical strategy is to secure a supplier with stable production, controlled moisture, reliable particle size distribution, and transparent batch inspection.
For procurement managers, the key question is simple: can this supplier deliver stable furnace performance for several months, not just provide one good sample?
ZhenAn International can provide current specifications, shipment availability, and real-time quotation for silicon carbide 75 based on target chemistry, particle size, destination port, and monthly demand.
FAQ
What is silicon carbide 75 used for in steelmaking?
Silicon carbide 75 is mainly used as a deoxidizer, reducing agent and slag conditioning material in steelmaking. It can provide silicon and fixed carbon at the same time. During use, SiC can support deoxidation, improve slag condition and help reduce part of ferrosilicon consumption in suitable furnace practices.
Can silicon carbide 75 replace ferrosilicon completely?
In most steel plants, silicon carbide 75 is used as a partial replacement rather than a full replacement for ferrosilicon. SiC 75 can reduce part of the deoxidation and reduction cost, while ferrosilicon is still commonly used for final silicon adjustment. The proper replacement ratio depends on steel grade, furnace type, addition timing and target silicon recovery.
What SiC content specifications can ZhenAn supply?
ZhenAn can supply different silicon carbide grades according to steel plant requirements, including SiC 65, SiC 70, SiC 75 and SiC 85. Common indicators include SiC content, fixed carbon, sulfur, phosphorus, moisture, ash and particle size. Customers can send their target specification for confirmation.
What particle sizes are available for silicon carbide 75?
Common particle sizes include 0–10 mm, 1–10 mm, 3–10 mm, 10–50 mm and customized sizes. For steelmaking use, particle size should match the furnace type and feeding method. ZhenAn can control particle size distribution according to customer requirements to reduce excessive fines and improve stable use.
How is the price of silicon carbide 75 calculated?
The price of silicon carbide 75 depends on SiC content, fixed carbon level, sulfur requirement, particle size, order quantity, packaging method, delivery terms and destination. Since raw material and freight costs change regularly, customers are advised to contact ZhenAn for the latest quotation based on their exact specification and monthly demand.
Does ZhenAn have silicon carbide 75 in stock?
Stock availability depends on grade, particle size and current order schedule. ZhenAn usually maintains supply capacity for common steelmaking grades such as SiC 70 and SiC 75. For urgent orders, customers can contact the sales team to check current inventory, loading schedule and earliest shipment date.
What packaging options are available?
Silicon carbide 75 is commonly packed in 1MT jumbo bags. Other packaging options, such as 25kg bags inside jumbo bags or customized packaging, can also be arranged according to customer requirements. Packaging can be adjusted based on handling method, warehouse conditions and destination port requirements.
Can ZhenAn arrange international shipment?
Yes. ZhenAn can arrange shipment by sea, rail or truck depending on destination and order volume. Common delivery terms include FOB, CFR and CIF. Customers can provide destination port, required quantity and packaging method to receive a complete quotation with freight and estimated delivery schedule.
How should buyers evaluate a silicon carbide supplier?
Buyers should not only check the chemical analysis report. A reliable silicon carbide supplier should provide stable SiC content, controlled moisture, proper particle size distribution, consistent packaging and clear batch inspection. For steel plants, stable furnace performance is more important than a low one-time price.
How can I get a quotation for silicon carbide 75?
You can send your required SiC content, particle size, quantity, destination port, packaging requirement and delivery term to ZhenAn. The team will confirm available specifications, current price, stock status and shipment plan based on your actual procurement needs.
Looking for stable silicon carbide 75 supply for steelmaking?
Send us your required SiC content, particle size, quantity, destination port and packaging request. ZhenAn can confirm available grades, current stock, real-time price and shipment schedule.
Why Choose Zhen'an?
ZhenAn International Co., Limited is committed to becoming a globally competitive supply chain group.
We specialize in metallurgical and refractory products, integrating production, processing, sales, and import-export. Our operations include two modern manufacturing bases covering 30,000 square meters, complete hydro-metallurgy production lines, two key laboratories, a metallurgical materials testing center, and dozens of senior researchers.
Annual production and sales exceed 150,000 tons.
What makes us different: we don't chase size. We deliver the right quality and right quantity to match each customer's specific process. Our goal is to be the most reliable supply chain partner in the industry, not the biggest.
