Silicon Carbide 85 For Steelmaking And Ladle Refining

Silicon carbide 85 is used in steelmaking as a silicon-carbon material for deoxidation, reduction and slag adjustment. It contains SiC 85% min, with controlled fixed carbon, sulfur, phosphorus, moisture and particle size.

For steel plants, this grade is usually selected when 70% SiC brings too much impurity into the furnace, while 90% SiC is not necessary from a cost point of view. In actual EAF and ladle refining use, 85 grade is often the more practical choice: enough active SiC for reaction, but without pushing the material cost too high.

ZhenAn supplies silicon carbide 85 in common sizes such as 0–10mm, 1–5mm and 1–10mm. Moisture is controlled at 0.5% max before shipment.

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Application in EAF Steelmaking

In an electric arc furnace, SiC 85 is usually added during the reduction or slag adjustment stage. The plant does not choose it only for silicon content. It is chosen because it can provide silicon, fixed carbon, and heat at the same time.

For example, when slag FeO is high after oxygen blowing, alloy recovery becomes unstable and more ferrosilicon may be needed for correction. In this situation, SiC 85 can reduce part of the oxidizing slag, support deoxidation, and improve silicon recovery.

Its reaction also has an Exothermic effect. This heat release helps maintain bath temperature during reduction. For EAF plants with high electricity cost, this matters because every stable heat input helps reduce unnecessary power compensation.

That is why many steel plants use silicon carbide 85 as a partial replacement for ferrosilicon, not a full replacement. SiC 85 handles part of the reduction and deoxidation work, while ferrosilicon remains for final composition adjustment.

Application in Ladle Refining

In ladle refining, the steel is already close to the final composition. At this stage, material stability is more important than low purchase price.

If a lower-grade SiC contains more ash or unstable sulfur, the problem may appear as slag fluctuation, lower cleanliness, or additional correction before casting. SiC 85 is used when the plant wants higher active SiC input with less unnecessary residue.

A common ladle scenario is final deoxidation adjustment after tapping. The operator needs a material that reacts steadily and does not bring too much impurity into the ladle. With controlled particle size such as 1–5 mm or 1–10 mm, SiC 85 can dissolve and react more predictably.

This is why SiC 85 is suitable for plants producing steel grades that require cleaner slag control and more stable final chemistry.

SiC 85 is sensitive to moisture during storage and transport. High moisture reduces effective charging value and may cause unstable reaction when added into high-temperature zones.

At ZhenAn's production line in Anyang, SiC 85 goes through an automated drying system after screening. We control moisture before packing because Anyang's rainy season can quickly increase surface moisture during storage and loading.

This is why we use thickened moisture-proof bags for export packing. The purpose is simple: keep the material dry from warehouse to container loading, and reduce moisture risk before it reaches the steel plant.

For standard export orders, SiC 85 is usually packed in 1MT jumbo bags. For long-distance shipment or high-humidity destinations, inner liners or small bags inside jumbo bags can be arranged.

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ZhenAn checks SiC 85 by batch, not only by sample.

Raw materials are inspected before production. After crushing and screening, particle size is checked. After drying, moisture is tested. Before shipment, each batch can be tested by XRF to confirm key chemical indicators such as SiC-related composition, sulfur, phosphorus, and impurity elements.

This process is used because steel plants need stable furnace performance, not only a good laboratory report.

Q:What is silicon carbide 85 used for?

A:Silicon carbide 85 is mainly used as a silicon carbide deoxidizer in EAF steelmaking, ladle refining, and slag reduction. It provides silicon, fixed carbon, and heat during reaction, helping steel plants improve deoxidation stability and reduce part of ferrosilicon consumption.

Q:Why choose silicon carbide 85 instead of 70 or 90 grade?

A:SiC 85 is a practical balance between cost and purity. Compared with 70-grade SiC, it brings higher active SiC content and less impurity input. Compared with 90-grade SiC, it is usually more economical for normal EAF and ladle refining applications.

Q:What particle sizes and packaging are available?

A:Common sizes include 0–10 mm, 1–5 mm, and 1–10 mm. Standard packing is usually 1MT jumbo bag. For humid destinations or long-distance shipment, ZhenAn can provide thickened moisture-proof bags, inner liners, or 25kg small bags inside jumbo bags.

Q:How is silicon carbide 85 price calculated?

A:The silicon carbide 85 price depends on SiC content, fixed carbon level, sulfur and phosphorus limits, particle size, order quantity, packing method, delivery term, and destination port. Buyers can send their required specification and monthly demand for a current quotation.

Q:Does ZhenAn have silicon carbide 85 in stock?

A:Stock depends on particle size, order quantity, and current production schedule. ZhenAn can confirm available inventory, nearest loading date, packaging method, and shipment schedule after receiving the required specification and destination port.

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