Hebei Fengchao Import and Export Co., Ltd. is one of the most reliable manufacturers and suppliers of natural 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 natural graphite carburizer 0-0.2mm made in China, welcome to get pricelist from our factory.
The 0-0.2mm natural graphite carburizer is flaky fine graphite powder produced from carefully selected natural graphite ore through mineral beneficiation, purification and ultra-fine grinding. It features a primary flake crystal morphology and dissolves rapidly upon contact with molten iron. With good lubricating properties and outstanding cost performance, it is suitable for precise carbon trimming in the later smelting stage of medium-frequency furnaces. It helps foundries fine-tune carbon content accurately and stabilize the metallographic structure during continuous casting of grey iron and ductile iron castings.
The 0-0.2mm natural graphite carburizer is manufactured from premium natural flake graphite ore via beneficiation, purification and ultra-fine grinding. It retains the original flaky crystal structure of natural graphite and dissolves quickly once the powder contacts molten iron. Unlike synthetic graphite subjected to high-temperature heat treatment, this product skips high-temperature graphitization calcination, resulting in relatively higher baseline impurities, yet delivers remarkable cost advantages. It is used for precise late-stage carbon adjustment in medium-frequency furnaces at foundries and disperses uniformly within the molten iron bath. Widely applied in continuous mass production of grey iron and ductile iron, it enables foundry technicians to adjust carbon content accurately, optimizes graphite nucleation conditions and maintains stable metallographic structure of castings.
This product is made of selected flake graphite raw ore through flotation purification, impurity removal and ultra-fine grinding classification to produce 0-0.2mm fine flake graphite powder. The upper particle size limit is strictly controlled to reduce residual coarse particles, ensuring the powder disperses and dissolves rapidly after entering molten iron and delivers favorable graphite nucleation performance. The production technical team manages the flotation purification process and keeps fixed carbon and ash indicators under strict control. A separate processing and storage zone for natural graphite powder is set up, separated from synthetic graphite grades to avoid cross-contamination among different carbon materials. It mainly supplies foundries producing grey iron and ductile iron castings. Besides routine physical and chemical tests, particle size screening and powder flowability tests are conducted. Samples are retained for each batch. Third-party sampling and laboratory analysis are available for export orders. Leveraging its rapid powder dissolution, it fits late-stage carbon trimming and helps improve molten iron metallography, enabling effective cost control in mass casting production.
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FAQ
Q: What are the core practical differences between the 0-0.2mm natural flake graphite carburizer and ultra-fine synthetic graphite powder for casting applications?
A: Natural flake graphite retains the native lamellar structure, which facilitates graphite nucleation in molten iron and is more beneficial to the metallography of ductile iron and grey iron. However, silicate impurities can hardly be fully removed by flotation purification, so its ash content is generally higher than synthetic graphite powder. Ultra-fine synthetic graphite powder has lower sulfur, nitrogen and fewer impurities, making it more suitable for high-grade alloy steel. Natural graphite powder is designed mainly for late-stage carbon trimming in casting, supports graphite precipitation in castings, and offers better procurement cost performance.
Q: This product is ultra-fine powder and generates substantial dust during feeding. What on-site measures can be adopted to reduce powder loss?
A: Avoid pouring and scattering directly from high elevations into the furnace. Closed powder injection feeding systems are preferred, using inert gas flow to deliver the powder beneath the molten iron surface. For manual feeding, add small quantities multiple times by sprinkling slowly along the furnace wall, followed by gentle stirring of molten iron immediately after feeding. Dust not only causes material loss but also creates workshop environmental hazards and fire risks from airborne graphite dust.
Q: Why is natural graphite powder more suitable for late-stage carbon trimming and not recommended as the primary carbon additive in the early stage of medium-frequency furnace melting?
A: The fine powder particles are easily entrained and directly burned and oxidized by rising high-temperature gas flow in the furnace if added with cold furnace burdens at the early stage, leading to high burn loss. When added after molten iron is fully melted and the bath is formed, it dissolves rapidly with markedly reduced burn loss. If this powder is forcibly used for primary carbon addition at the early stage, the actual carbon yield fluctuates greatly, and burden calculation becomes far more difficult.
Q: When purchasing the 0-0.2mm natural graphite carburizer, besides fixed carbon, which impurity indicators require close attention?
A: Ash content is the top priority, followed by silica content. Natural graphite ore is associated with silicate minerals; excessive silica will alter slag properties and increase total slag volume. Moisture content should also be monitored, as the powder agglomerates easily when damp. Caked powder tends to clog spray guns during powder injection feeding. For ductile iron production, trace elements such as titanium must also be strictly controlled to prevent interference with nodulizing effects.
Q: For foundries mass-producing grey iron and ductile iron castings, how to balance the selection between natural graphite carburizer and synthetic graphite powder?
A: For standard-grade grey iron and ordinary ductile iron, the 0-0.2mm natural graphite carburizer is preferred for late-stage fine carbon adjustment to reduce raw material costs. For high-grade ductile iron castings with stringent control over inclusion defects, low-impurity synthetic graphite powder is recommended. Combined usage is also feasible: granular synthetic graphite for primary carbon addition at the early melting stage, and small supplementary additions of natural flake graphite powder in the later smelting phase, balancing metallographic quality and overall production costs.
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