Hebei Fengchao Import and Export Co., Ltd. is one of the most reliable manufacturers and suppliers of artificial graphite carburizer 0-0.2mm in China. With a professional production team, we are able to meet the needs of the majority of our customers. If you're going to wholesale bulk artificial graphite carburizer 0-0.2mm made in China, welcome to get pricelist from our factory.
This 0-0.2mm synthetic graphite carburizer is made of fine graphite powder subjected to ultra-high-temperature graphitization treatment. It features high fixed carbon content with excellent low-sulfur and low-nitrogen specifications. It dissolves rapidly and delivers uniform carbon pickup in molten iron. The powder grade supports injection charging and dry pre-mixing and conditioning inside ladles. As a high-end metallurgical carbon additive, it is suitable for precise fine-tuning of carbon content in the later smelting stage of ductile iron and alloy steel, reducing melt composition fluctuations and improving the consistency of finished casting quality.
This 0-0.2mm synthetic graphite carburizer is produced from carbon raw materials via high-temperature graphitization processing. Graphitization reconstructs the internal carbon atomic structure and greatly reduces sulfur, nitrogen and harmful ash impurities. This fine powder dissolves quickly upon contact with molten metal. Unlike coarse-grained carburizers that release carbon through slow melting, this graphite powder can be used for ladle injection and late-stage composition adjustment in smelting. It is widely applied in the production of high-quality ductile iron, wear-resistant castings and alloy steel. It helps metallurgical and foundry enterprises narrow the fluctuation range of carbon, stabilize melt assay composition and cut casting rejects caused by excessive or insufficient carbon content.
Carbon base materials are selected, treated by high-temperature graphitization, then subjected to ultra-fine grinding and air classification screening to produce 0-0.2mm fine graphite powder. The particle size range is strictly controlled; oversized coarse particles are removed to ensure concentrated powder particle size without large particle impurities. The production technical team focuses on controlling the graphitization holding temperature range and cooling schedule to stabilize key indicators including fixed carbon, sulfur and nitrogen. An independent enclosed workshop and storage area for powder materials is built with dust isolation measures to prevent cross-contamination with other coarse carbon materials, mainly supplying high-end foundries and special steelmaking customers. In addition to routine test items, special laboratory analysis for nitrogen, sulfur and particle size distribution is carried out. Samples are retained and filed for each batch. Third-party sampling and testing are available for export orders. External inorganic ash impurities are strictly controlled to guarantee powder flowability, meet injection feeding requirements and realize precise late-stage carbon adjustment.
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FAQ
Q: This 0-0.2mm synthetic graphite powder is suitable for ladle injection carbon replenishment. What factors affect carbon absorption rate during injection?
A: First of all, powder flowability is critical; moisture-induced agglomeration will cause poor feeding. Secondly, the carrier gas pressure for injection must be properly controlled. Too low pressure easily leads to material accumulation and pipe blockage, while excessively high pressure causes powder to escape directly with furnace gas and incur losses. In addition, molten steel temperature in the ladle cannot be too low. Under low melt temperature, graphite powder floats up before full dissolution, resulting in a marked drop in absorption rate.
Q: Why can synthetic graphite carburizer achieve low nitrogen, while calcined anthracite carburizer generally has higher nitrogen content?
A: During ultra-high-temperature graphitization (2600 3000℃), bound nitrogen in raw materials decomposes under heat and escapes in gaseous form. Anthracite only undergoes rotary kiln calcination at temperatures far lower than graphitization temperature, so combined nitrogen within the coal matrix can hardly be fully removed. Therefore, synthetic graphite powder is preferred for high-end castings sensitive to nitrogen.
Q: Can this fine graphite powder still be used for smelting if caking occurs during storage?
A: Slightly agglomerated material can be used after thorough crushing and sieving. If severely hardened caking appears, the powder usually absorbs substantial moisture, and direct injection is not recommended. Injecting damp agglomerated material directly into the ladle may cause molten steel surging and splashing. The warehouse must remain dry and airtight. Use the material promptly upon arrival and avoid long-term storage.
Q: For synthetic graphite carburizer, what advantages does the 0-0.2mm powder have over granular synthetic graphite for late-stage ladle carbon fine-tuning?
A: Ultra-fine powder has a larger specific surface area and dissolves faster upon contact with molten steel, enabling rapid carbon fine-tuning within a short time after tapping. Coarse granular synthetic graphite has a longer dissolution cycle and is more suitable for early furnace charging. However, strict control of injection process parameters is required for fine powder to prevent material loss carried away by flue gas.
Q: When using the 0-0.2mm synthetic graphite carburizer, can it completely replace petroleum coke carburizer directly?
A: It depends on the indicator requirements of the smelted product. Synthetic graphite delivers higher carbon absorption and lower sulfur and nitrogen, yet its procurement cost is higher than petroleum coke. Full replacement is not recommended for ordinary carbon products from a cost perspective. For high-grade ductile iron and alloy steel, this graphite powder is preferred for precise late-stage carbon adjustment to strictly control sulfur and nitrogen impurities.
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