5 Things to Know Before Buying 0-2mm Graphite Carbon Additive

What is a Carbon Raiser?

Carbon raiser is an efficient carbon additive material widely used in steel and casting, improving their hardness, strength, and wear resistance. Carbon raisers appear as black granules with sizes of 0.2–2mm, 1–3mm, and 5–8mm. Their chemical composition mainly consists of fixed carbon (F.C), sulfur (S), and nitrogen (N). The primary raw materials for producing carbon raisers include petroleum coke, anthracite, and graphite powder, which are extensively used to manufacture different types of carbon raisers to meet various application needs. XLS Metals has developed high-efficiency carbon raiser products based on user requirements, featuring high F.C content, high absorption rates, and high purity.

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Applications of Carbon Raiser

Steel making: By using carbon raisers during steelmaking, the carbon content in steel can be effectively adjusted, improving the steel’s hardness, toughness, and wear resistance.

Casting: Carbon raisers used in casting have the advantages of low sulfur and low nitrogen. They effectively promote the formation of graphite nuclei, improving the graphite distribution and significantly enhancing the quality and yield of castings.

Metallurgy: Carbon raisers adjust the carbon content in alloys, improving various performance aspects, thereby serving the role of carbon enhancement and replenishment.

Specifications of Carbon Raisers

Classification Chemical Composition (%) CPC (Calcined Petroleum Coke) Carbon Raiser Grades F.C(Fixed Carbon) Ash V.M(Volatile Matter) S(Sulphur) Moisture CPC-1 98.5% min 0.5% max 0.5% max 0.3% max 0.5% max CPC-2 98.5% min 0.5% max 0.5% max 0.5% max 0.5% max CPC-3 98.5% min 0.7% max 0.8% max 0.8% max 0.5% max CPC-4 98.5% min 0.7% max 0.8% max 1.2% max 0.5% max Size: 0~1mm, 1~3mm, 3~8mm, 1~10m or at customers' option CAC (Calcined Anthracite Ccoal) Carbon Raiser CAC-1 95% min 4.0% max 1.0% max 0.3% max 1.0% max CAC-2 93% min 5.5% max 1.5% max 0.3% max 1.0% max CAC-3 90% min 8.0% max 2.0% max 0.5% max 1.0% max Size: 0~1mm, 1~4mm, 1~5mm, 1~10m, 4~10mm or at customers' option GPC (Graphitized Petroleum Coke) Carbon Raiser GPC-1 98% min 1.0% max 1.0% max 0.05% max 0.5% max GPC-2 98.5% min 0.7% max 0.8% max 0.05% max 0.5% max GPC-3 99% min 0.5% max 0.5% max 0.03% max 0.5% max Size: 1~3mm, 1~5mm, 0.5~6mm, 1~10m, or at customers' option

Advantages of Carbon Raiser

• High fixed carbon content

• Low impurities and high purity

• Efficient carbon raising

• High absorption rate

• Good thermal insulation properties

• Low sulfur and low nitrogen characteristics for casting carbon raiser

• Easy to use

• Convenient storage

Classifications of Carbon Raiser

Based on different raw materials, carbon raisers can be categorized into calcined coal carbon raisers, graphite carbon raisers, and petroleum coke carbon raisers. Depending on production processes, they can also be divided into graphite carbon raisers and calcined coal carbon raisers. Combining production processes and raw materials, the main types include graphitized petroleum coke carbon raisers (GPC), calcined anthracite carbon raisers (CAC), and calcined petroleum coke carbon raisers (CPC).

Carbon Raisers for Different Fields

Carbon Raiser for Steel: To reduce steel production costs, carbon raisers for steel usually focus on calcined coal carbon raisers. By calcining anthracite at °C, impurities are effectively reduced, resulting in high carbon content, low costs, and good carbon raising effects. Calcined coal carbon raisers are widely used in various steel production processes, enhancing strength, improving plasticity, and increasing weldability.

Carbon Raiser for Casting: Since sulfur (S), phosphorus §, and nitrogen (N) severely affect casting quality, carbon raisers for casting are often required to have low sulfur, low nitrogen, and low phosphorus characteristics. Graphitized petroleum coke carbon raisers and graphitized carbon raisers are the primary types used in casting, featuring high thermal insulation, high purity, and low harmful elements, widely applied in the production of ductile iron and gray cast iron. They effectively reduce the tendency for white iron defects and enhance the fluidity of molten iron during the casting process, preventing nozzle blockage and improving the plasticity and wear resistance of castings.

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Sustainability

As market demands for steel performance diversify, carbon raisers are widely used in the smelting processes of different steel grades and cast iron, effectively improving the mechanical properties of steel and cast iron. With the increasing environmental protection requirements in various countries, carbon raisers have prompted companies to seek greener production methods, becoming a promising eco-friendly furnace material. XLS Metals has been dedicated to the research and production of carbon raisers for over a decade, holding multiple patented technologies, opening new raw material procurement channels, and establishing an independent R&D laboratory. This has created more possibilities for the production and application of carbon raisers, enhancing their performance and range of applications.

Wholesale Bulk Carbon Raisers at Best Prices

As an essential furnace material for steelmaking and casting, carbon raisers have a high market demand. Users prefer to purchase bulk carbon raisers in wholesale quantities at discounted prices. Buying bulk carbon raisers directly from manufacturers not only provides more discounts but also offers more professional guidance and reliable after-sales service. By wholesale directly from manufacturers, the procurement process is significantly streamlined, reducing labor and time costs, thus allowing users to genuinely purchase carbon raisers at best prices. Due to its natural raw material advantages, China is currently the largest producer of carbon raisers globally, with numerous manufacturers and suppliers available domestically. Users can expand their wholesale options for carbon raisers from China, comparing several manufacturers or suppliers to find more best prices for procurement. XLS Metals, located in Anyang, Henan, China, is a highly reputable manufacturer of carbon raisers, serving customers across multiple countries worldwide, primarily supplying high-quality carbon raiser products to steel mills and foundries. XLS Metals has significantly streamlined the purchasing process for users of carbon raisers and optimized related raw material procurement channels, enabling users to buy high quality carbon raiser products at even more competitive prices. Over the years, XLS Metals has earned widespread acclaim among its customer base for its reliable quality and more professional service.

XLS Metals Carbon Raisers

XLS Metals is a high-tech manufacturer engaged in the research and production of carbon raisers, equipped with advanced production facilities and laboratories, and holding multiple patents related to carbon raisers. Over the years, XLS Metals has carefully listened to user needs and continually improved carbon raisers to achieve higher purity and optimal carbon raising effects. To assist users, XLS Metals has established a 24/7 online service and assembled a professional and youthful technical team ready to address any issues users may encounter, providing more specialized purchasing plans and usage guidance. XLS Metals has received praise from users as the best "carbon raiser supplier and manufacturer" due to its reliable product quality and excellent service.

I’ve dealt with carbon components quite a bit, not that much though in terms of moving parts.

In the past, especially for my carbon fiber fishing rods I use polishing wax as for car paint on those joints.
That was to both seal the surface and to provide a smoother surface to get a longer service life.

For our printers though I seem to get, how shall I say it?
Conflicting info on the Bambu pages…
We shall clean the rods more or less often in order to remove dust, mainly that fine carbon dust.
But in the same articles it is also stated that the drive system RELIES on this carbon for lubrication.

YES, carbon as in GRAPHITE powder is classified as a lubricant, but not dust resulting from grinding carbon fibers and the resin binding it.
As we have a belt system it can only be rollers moving on those rods and those bearings should be sealed - to prevent dust and other things from entering.
Excessive rod wear and a lack of cleaning will result in stuff building up on these rollers.

Can anyone please make clear whether these rods suffer from wear and tear and if this wear and tear is somehow able to provide lubrication ???
Because if not then I would rather properly seal my carbon rods than to see them slowly turning into dust and requiring a complex and probably costly replacement job.

Now THAT finally starts to make sense!
Graphite patches making sure friction is kept low makes far more sense in terms of cleaning needs than wear and tear on the rods.
Leaves the question though how long these pads last and when the time might come to replace them and how…

Graphite dust neither likes other lubes, nor being removed from spots it filled up to even a surface.
That would only leave hard coatings for those rods, hard enough not to bind the graphite but still flexible enough to not chip.
Does not really leave much, does it…

I had a chat with a friend overseas, he is an engineer and works A LOT with all sorts of carbon components.
Let me try to sum up the chat:

Carbon is really great to save weight but nowhere near the best material in terms of abrasion resistance in line with moving parts.
Whenever he has to make things move plastic washers/bushings are used whenever possible.
Unlike metal rods, carbon rods won’t really tolerate linear bearing and bushings…

Bambu stating ‘self lubricating’ in combination with carbon rods is bogus, no way around it, a marketing gag at best.
With linear bearing out the only option that works for a sufficient time is by going old school.
Meaning a set of rollers is used like on our laser cutters of big scale and such machines.
My friend claims that on a well (ab)used machine a gauge to check the out diameter of round objects would reveal the rods have ‘flat’ areas from where those wheels move.
Maybe someone with an older machine could check this one day ?

We know Bambu claims there is some sorts of wiper to clean and lube those rods.
Usually that would just be carbon brushes to keep them clean as there is no feasible way to auto lube carbon rods.
Graphite blocks would be able to provide lubrication but would also mean they wear down rather quickly.
With the conundrum of Bambu stating self lubrication AND the need to clean the rods from the leftovers we are left with basically nothing.
Only way to know for sure would be to take a machine apart and actually check …

Sounds promising. Are you planning to fabricate stiffer end pieces, or is there already some other way of sourcing them? By that I mean: if maybe the models were already posted somewhere, maybe you could get them printed in PEEK or some other wonder material, now that JLCPCB, PcbWay, and probably a host of others are offering that kind of service. I tried getting some quotes a year or so ago, and prices then were through the roof, but it seems prices have come down quite a bit since then.

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