EL 1697 DO
A 97% silicon carbide deoxidizer for precision deoxidation of high-performance steel.
EL-1697-DO is a 97% silicon carbide (SiC ≥ 97%) deoxidizer for precision deoxidation of high-performance steels — bearing, pipeline, and special alloy grades that demand low inclusion levels.
What it is
EL 1697 DO for Sale
EL 1697 DO is 97% Silicon Carbide (SiC 97), is a high-purity black silicon carbide with a silicon carbide content of at least 97%. Produced from high-purity quartz sand and petroleum coke, this product undergoes precise smelting in high-temperature electric furnaces and multiple purification processes, resulting in extremely low impurity levels. It is the material of choice for the smelting of high-purity molten steel and for refractory materials in critical sections of large blast furnaces.
97% Silicon Carbide is specifically designed for precision deoxidation of high-performance steel grades, such as bearing steel, pipeline steel, and special alloy steels. It features significantly lower levels of impurities such as free carbon and Fe₂O₃, effectively preventing secondary contamination of molten steel and meeting the stringent purity requirements of high-end steel grades.
Deoxidation Mechanism
Deoxidation Mechanism
EL 1697 DO deoxidizes through the standard reaction, with its 97% purity delivering cleaner results:
SiC + 3[O] → SiO₂ + CO↑. At 97% SiC with free carbon ≤ 0.3% and Fe₂O₃ ≤ 0.4%, the deoxidation products form cleanly and the reducing slag stays controlled.
Versus traditional aluminum deoxidizers it lifts deoxidation efficiency by ~40%, lowers final oxygen activity by 15–20 ppm, and shortens deoxidation time by 2–3 minutes — while lifting manganese recovery from ~82% to over 90%.
Key Advantages
Key Advantages
EL 1697 DO balances high purity with practical deoxidation performance:
Extremely low impurities
Fe₂O₃ ≤ 0.4%, free carbon ≤ 0.3% — no secondary contamination.
Higher deoxidation efficiency
~40% better than aluminum deoxidizers; oxygen down 15–20 ppm.
Improved steel purity
Fewer subsurface bubbles and pinholes; better billet microstructure.
Higher alloy recovery
Manganese recovery from 82% to over 90%.
Energy & emission savings
Dust −30%, slag −15%, electricity −5–8%.
Technical Specifications
Technical & Physical Specifications
Specifications for EL 1697 DO. Third-party inspection (SGS/BV/CCIC) is acceptable on request.
Technical specifications
| Parameter | Typical value | Notes |
|---|---|---|
| SiC Content | ≥ 97.0% | Typical range 97%–98% |
| Free Carbon (F.C.) | ≤ 0.3% | Strict impurity control |
| Fe₂O₃ Content | ≤ 0.4% | Ensures steel cleanness |
| SiO₂ Content | ≤ 1.0% | — |
| Al₂O₃ Content | ≤ 0.5% | — |
| S Content | ≤ 0.05% | — |
| H₂O Content | ≤ 0.3% | — |
| Specific Gravity | 3.20–3.25 g/cm³ | Hexagonal crystal |
| Microhardness | 2840–3320 kg/mm² | — |
| Particle Size | 0–1 / 1–3 / 3–5 / 1–10 mm, 200 mesh (customizable) | — |
| Appearance | Black granules or briquettes | — |
Usage
Forms & Application
Silicon Carbide Granules (Metallurgical Grade)
0–1, 1–3, 3–5, 1–10 mm and 200 mesh dense granules for smooth furnace feeding; 10–50 mm lump available.
Silicon Carbide Powder (Lining Grade)
200#–0 / 180#–0 / 1–0 mm core raw material in anhydrous gunning mix for large blast furnaces.
Silicon Carbide Pellets (Furnace Charge Grade)
10–50 mm spherical pellets that cut dust loss during charging and give consistent recovery in converters and EAF.
Types of 97% Silicon Carbide
The advantages of 97% silicon carbide lie in its meticulously controlled impurity levels and exceptional deoxidation efficiency. Patented technology for bearing steel smelting explicitly requires “deoxidation using high-purity silicon carbide with a purity greater than 95%,” and the 97% grade fully meets and exceeds this threshold. In actual smelting operations, the 97% grade achieves approximately a 40% increase in deoxidation efficiency compared to traditional aluminum deoxidizers, reduces the final oxygen activity of molten steel by 15–20 ppm, and shortens deoxidation time by 2–3 minutes; The recovery rate of valuable alloying elements such as manganese and chromium has increased from approximately 82% to over 90%, while dust emissions have been reduced by 30%, slag volume has decreased by 15%, and electricity consumption has fallen by 5%–8%.
Silicon Carbide Granules (Metallurgical Grade)
Typical particle sizes: 0–1 mm, 1–3 mm, 3–5 mm, 1–10 mm, 200 mesh
97% black silicon carbide granules are a high-performance metallurgical additive specifically designed for high-end steel smelting. The 10–50 mm lump-shaped granules are dense, high-strength, and dust-free, ensuring smooth feeding into the furnace and uniform reactions. A variety of particle size specifications can be customized to meet the needs of different smelting processes.
Silicon Carbide Powder (Lining Grade)
Particle Size: 200#-0 / 180#-0 / 1-0 mm
97% silicon carbide is a core raw material in the formulation of an anhydrous gunning mix for large blast furnaces. Anhydrous gunning mix is prepared using electrofused corundum, 97% silicon carbide, coke powder, activated alumina powder, and Guangxi clay as the main raw materials, with phenolic resin as the binder. The 97% grade ensures that the gunning mix has excellent resistance to slag erosion, high-temperature structural strength, and scouring resistance.
Silicon Carbide Pellets (Furnace Charge Grade)
Specifications: 10–50 mm spherical
Silicon carbide pellets effectively reduce dust loss during blast furnace charging, thereby improving absorption and utilization rates. Compared to loose granules, pellets are easier to measure, produce less dust, and offer more consistent recovery rates when added to converters and electric arc furnaces.
Technical Specifications
High-purity silicon carbide deoxidizer for steelmaking is primarily composed of SiC, with trace amounts of impurities. When the SiC content reaches 97%, all impurity elements must be strictly controlled to extremely low levels, as outlined in the table above.
*Third-party inspection (SGS/BV/CCIC) is acceptable upon request.
Advantages
Extremely low impurity content
Fe₂O₃ ≤ 0.4%, free carbon ≤ 0.3%, effectively preventing secondary contamination of molten steel by impurity elements
Higher deoxidation efficiency
The deoxidation efficiency is approximately 40% higher than that of traditional aluminum deoxidizers
Improved molten steel purity
Reduces oxygen content in steel, minimizes defects such as subsurface bubbles and pinholes, and improves the solidification microstructure of cast billets
Increased alloy recovery rate
Manganese recovery rate increases from 82% to over 90%
Significant energy savings and emissions reduction
Reduces dust emissions by 30%, decreases slag volume by 15%, and lowers electricity consumption by 5%–8%
Application
01. Deoxidation of Special Steels and High-Purity Steels
- Bearing Steel: Bearing steel imposes extremely stringent requirements on oxygen content and inclusion control. Deoxidation using high-purity silicon carbide with a purity greater than 95% can significantly reduce the content of Class A, Class B, and Class D inclusions, thereby improving the forging performance and service life of bearing steel. A patented bearing steel smelting technology explicitly requires “deoxidation using high-purity silicon carbide with a purity greater than 95%.”
- Pipeline Steel: Strict requirements exist for sulfur, phosphorus, and oxygen content, as well as the morphology of inclusions; the 97% grade meets the needs for deep deoxidation.
- Special Alloy Steels: High standards are set for molten steel purity and alloy element recovery rates; the 97% grade ensures stable element recovery rates.
- High-Quality Carbon Structural Steel: Stable control of oxygen content and non-metallic inclusions in the steel is required.
02. Taphole Clay for Large Blast Furnaces
97% silicon carbide is the core raw material in the formulation of taphole clay for large blast furnaces.
Silicon carbide is typically required in the 200#-0 or 180#-0 grade and must be used in combination with 1-0 mm particles.
- High thermal conductivity, accelerating heat transfer
- High wear resistance, withstanding molten iron erosion
- Low coefficient of thermal expansion, providing excellent thermal shock stability
- High refractoriness, resisting slag erosion
03. Slag Modification and Refining
In LF refining furnaces, 97% silicon carbide can be used to rapidly produce white slag, lower the slag melting point, promote slag-steel separation, and reduce erosion of the ladle lining. Its low impurity content ensures that no additional inclusions are introduced.
04. Foundry Inoculation
In the production of high-end castings, 97% silicon carbide can be used as an inoculant to promote graphitization, refine grain size, and improve the machinability of castings.
Economic Benefits
How to Use Silicon Carbide
Deoxidation Method During Tapping
First, add 2–5 kg per metric ton of steel to the bottom of the ladle as a preliminary deoxidizer.
When one-third of the molten steel has been tapped out, slowly add the remaining silicon carbide deoxidizer into the steel stream using a funnel chute.
Complete the addition within 30 seconds before tapping is finished.
Deoxidation Method During the Reduction Phase of an Electric Arc Furnace
Remove all (or 40–80%) of the oxidized slag. Once the thin slag has stabilized, add a small amount of carbon powder, followed by the SiC deoxidizer in a single batch or in multiple batches. The slag will turn white in about 5 minutes. After thorough stirring and a full analysis, continue to add small amounts of carbon powder and SiC deoxidizer in succession to maintain a reducing atmosphere.
Packaging, Storage, and Transportation
Small-bag packaging: The inner layer consists of moisture-proof polyethylene film bags, with a net weight of 1.25 kg per bag. Each bag is strictly heat-sealed to effectively block moisture.
Big Bag Packaging: 800 small bags (800 × 1.25 kg = 1,000 kg) are neatly stacked and loaded into a 1-metric-ton moisture-proof woven big bag. The top of the big bag is lined with a waterproof liner, and the bottom is equipped with a discharge spout.
Container Loading: Each standard 20-foot container can hold 25-ton bags, totaling 25 metric tons of 97% silicon carbide.
Ease of Use: Customers do not need to weigh the material during feeding. Simply remove one 1.25 kg small bag at a time and pour the entire contents directly into the ladle or electric furnace. The small bag rapidly melts and ruptures at high temperatures, leaving no residue and preventing dust from becoming airborne. This design not only protects against moisture but also significantly simplifies operations and reduces human error.
Customization Options: We accept custom orders for other small-bag sizes (1 kg, 2 kg, etc.) and different ton-bag capacities; we also provide export packaging services such as pallet stretch wrapping and fumigated pallets.
FAQ
EL 1697 DO — Frequently Asked Questions
A 97% SiC deoxidizer for precision deoxidation of bearing, pipeline, and special alloy steels; meets the >95% purity rule for patented bearing-steel practice.
~40% higher deoxidation efficiency, 15–20 ppm lower final oxygen, and 2–3 minutes shorter deoxidation time.
Manganese recovery rises from ~82% to over 90%, with stable chromium recovery.
Granules (0–1 to 1–10 mm, 200 mesh), lining powder (200#–0, 180#–0, 1–0 mm), and 10–50 mm charge pellets.
Yes. The 200#–0 / 180#–0 grade is a core aggregate in anhydrous gunning mix for large blast furnaces.
SGS, BV, and CCIC inspection are acceptable on request.
