Hebei Fengchao Import and Export Co., Ltd. is one of the most reliable manufacturers and suppliers of calcined anthracite coal carburizer 3-5mm 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 calcined anthracite coal carburizer 3-5mm made in China, welcome to get pricelist from our factory.
This 3-5mm calcined anthracite carburizer is produced from premium hard anthracite through high-temperature calcination, controlled granulation and screening. This medium particle size balances dissolution rate and oxidation resistance in molten steel. It avoids the drawback of flying loss prone to fine powder, and dissolves faster than large lump materials. As a cost-effective carbon additive, it delivers stable performance in medium-frequency furnace melting for cast steel and ductile iron, helping foundries achieve desirable carbon yield and simplify daily melting operations.
This 3-5mm calcined anthracite carburizer is manufactured by targeted crushing and precise screening of premium hard anthracite after high-temperature calcination. The medium grain size reduces losses caused by fine powder escaping with flue gas. Although its sulfur and ash contents are higher than those of petroleum coke-based carburizers, it maintains stable carbon yield under medium-frequency furnace melting conditions. Widely used in the melting of ductile iron, gray iron and ordinary cast steel, it enables steady in-furnace carbon adjustment and helps foundries optimize overall raw material costs for regular casting batches.
Dense lumpy anthracite is selected as raw material and sent into a rotary kiln for high-temperature calcination to remove volatile matter, followed by crushing and closed-circuit screening to produce 3-5mm finished products. Fine powder and oversize lumps separated by screening are disposed separately and will not be blended into finished products of the target particle size. Plant technicians continuously control calcination temperature and discharge cooling rhythm to reduce residual volatile matter in finished goods. An independent anthracite crushing and screening workshop is built in the plant with zoned stacking management, mainly supplying bulk orders for foundries using medium-frequency furnaces. In addition to conventional system certifications, fixed carbon and volatile matter are prioritized for testing. Samples are retained and filed for each batch. Third-party on-site sampling and inspection are available for export orders. Stone and gangue inclusions are strictly controlled to keep fluctuations of particle size and physicochemical indicators across batches within a narrow range.
Factory Tour
FAQ
Q: For this 3-5mm medium-grade carburizer in medium-frequency furnace melting, how should the material be laid during charging to improve carbon yield?
A: It is recommended to spread the carburizer at the furnace bottom and stack scrap steel on top to press it down by upper furnace charges. This reduces direct exposure of particles to high-temperature flame in the furnace chamber and lowers oxidative burnout on particle surfaces. Avoid concentrated pile feeding; scattered spreading can improve carbon absorption efficiency.
Q: Under identical conditions, how does the bed permeability of this 3-5mm calcined anthracite differ from the fine 0 1mm grade, and what impacts will this exert on melting?
A: Larger voids exist between 3 5mm particles, offering better bed permeability and smoother flue gas exhaust during melting. However, the bigger gaps may allow small flames to surge upward. Overall, this grade is more suitable for solid bed melting in medium-frequency furnaces and less likely to cause local sintering and caking compared with fine powder.
Q: Minor sulfur fluctuations occasionally occur between different batches under one contract. What are the contributing factors and how can they be controlled?
A: Sulfur variations stem from inherent indicator differences in raw coal seams. Sulfur cannot be completely removed in the calcination stage. We test and screen every batch of raw coal before production. If you impose strict sulfur control requirements, specify the maximum sulfur limit at order placement, and we will prioritize matching corresponding coal sources for production.
Q: Can this 3-5mm calcined anthracite carburizer be mechanically pre-blended with scrap steel and pig iron before charging into the medium-frequency furnace?
A: Mechanical pre-mixing is feasible. Nevertheless, due to the large specific gravity difference between these particles and pig iron or scrap steel, size segregation will occur during belt conveying and hopper discharging. The mixed material should be charged into the furnace promptly after blending and not be stored or transported for long periods to prevent material stratification and deviations of actual furnace feed proportion.
Q: A slight increase in fine powder is found after unloading upon ocean shipment. Does this count as a quality abnormality?
A: Bumping during long sea transit and impact from drop height in loading & unloading will chip off particle edges and generate a small amount of secondary fines. This is a physical phenomenon caused by transportation rather than non-compliant calcination quality. If the contract sets a rigid limit on fine powder proportion in finished products, we can add an extra screening process before shipment to control fine powder content.
Hot Tags: calcined anthracite coal carburizer 3-5mm, China calcined anthracite coal carburizer 3-5mm manufacturers, suppliers, factory
