Silicon Carbide 70 For Cost-Controlled Steelmaking

Silicon carbide 70 is a cost-effective silicon-carbon material used in steelmaking and foundry production. It contains SiC 70% min and F.C. 18–22%, with controlled sulfur, phosphorus, moisture and particle size.

Compared with 88% or 90% SiC, SiC 70 has a lower purchase cost. It is suitable for gray iron casting, EAF reduction, slag adjustment and non-special steel production where ultra-high SiC purity is not required.

ZhenAn supplies silicon carbide 70 in 1–10mm or customized sizes, with H₂O controlled at 0.5% max before shipment.

Get A Quote Now

Application in Gray Iron Casting

In gray iron casting, silicon and carbon control are both important. If the plant uses ferrosilicon for silicon adjustment and a separate recarburizer for carbon increase, the total additive cost can become high.

In this situation, silicon carbide 70 can be used as a combined silicon-carbon material. Its F.C. 18–22% helps support carbon input, while SiC contributes to silicon recovery and deoxidation.

For example, when a foundry produces ordinary gray iron castings and does not require high-purity SiC 90, SiC 70 can reduce the need for part of the recarburizer. The operator should calculate the fixed carbon contribution of SiC 70 together with the original carbon raiser amount, instead of adding both materials at the old dosage.

This is important because SiC 70 is not only a "lower-grade silicon carbide." In the right casting recipe, it can help reduce total additive cost.

Application in EAF Steelmaking

In EAF steelmaking, SiC 70 is commonly used during the reduction stage or slag adjustment stage. It is suitable for ordinary carbon steel and non-special steel grades where strict impurity control is not the main concern.

A common furnace situation is high FeO slag after oxygen blowing. When FeO remains high, alloy recovery may drop, and more correction alloy may be needed later. SiC 70 can help reduce part of the oxidizing slag and support deoxidation.

Its fixed carbon also participates in reduction reactions. Because SiC 70 contains 18–22% F.C., the plant should adjust the recarburizer plan together with SiC addition. If the original carbon raiser amount is not reduced, final carbon may exceed the target range.

For EAF plants under cost pressure, this is where SiC 70 has practical value. It can reduce part of the dependence on higher-cost SiC grades, while still supporting reduction and slag control.

Moisture control is important for sic for steelmaking. If the material contains excess water, it may cause steam release, unstable charging and furnace splashing when added into high-temperature zones.

At ZhenAn's Anyang plant, SiC 70 passes through an automated drying system after screening and before packing. We control H₂O at 0.5% max because Anyang's rainy season can quickly increase surface moisture during warehouse storage, truck loading and inland transport.

This is not only a laboratory number. For steel plants, wet SiC means lower effective charging weight and higher operational risk. Keeping moisture under control helps reduce splashing and keeps furnace addition more stable.

Get A Customized Solution

ZhenAn supplies silicon carbide 70 in standard 1MT jumbo bags. For humid destinations, long sea freight routes or special warehouse conditions, moisture-proof inner liners or customized packing can be arranged.

For bulk buyers, packaging and logistics directly affect real cost. A lower material price may lose value if the cargo arrives wet, broken or delayed. That is why ZhenAn provides not only product supply, but also customized logistics plans based on order quantity, destination port, packing method and delivery term.

Customers can request FOB, CFR or CIF quotation. For regular consumption such as 100MT, 300MT or monthly contract supply, ZhenAn can confirm stock status, loading schedule and delivered price to the destination port.

Q:What is silicon carbide 70 used for?

A:Silicon carbide 70 is used in gray iron casting, EAF reduction, slag adjustment and non-special steelmaking. It provides SiC 70% min and F.C. 18–22%, so it can support both deoxidation and carbon adjustment.

Q:Why choose SiC 70 instead of SiC 88 or SiC 90?

A:SiC 70 is more suitable when the plant needs cost control and does not require ultra-high SiC purity. For gray iron casting and ordinary steelmaking, SiC 70 can reduce additive cost while still providing silicon and fixed carbon.

Q:Should the recarburizer amount be adjusted when using SiC 70?

A:Yes. Since SiC 70 contains 18–22% fixed carbon, the carbon contribution should be counted together with the original recarburizer plan. This helps avoid excessive final carbon and may reduce separate carbon raiser consumption.

Q:What particle size and packaging can ZhenAn supply?

A:Common size is 1–10mm, and customized sizing is available. Standard packing is 1MT jumbo bag. Moisture-proof inner liners or special packing can be arranged for humid destinations or long-distance shipment.

Q:How can I get the latest silicon carbide 70 price?

A:Please send the required SiC content, particle size, quantity, destination port, packing method and delivery term. ZhenAn can confirm current price, sample analysis, stock status and delivered price to your port.

Hot Tags: silicon carbide 70 for cost-controlled steelmaking, China silicon carbide 70 for cost-controlled steelmaking manufacturers, suppliers, factory, 100 Grit Silicon Carbide, Green Carborundum, Sic Abrasive Powder 80 120 Grit, 36 Grit Silicon Carbide suppliers, Polishing Abrasive Silicon Carbide, 80 120 Grit Carborundum Granule