Answers

  • 0
  • 0

What problems should we pay attention to in the development of graphite technology?

If you are looking for high-quality products, please feel free to contact us and send an inquiry, email: brad@ihpa.net



The price of nickel and stainless steel rose together. Nickel afternoon hand in hand with stainless steel together turn red up. Due to the temporary easing of geopolitical risks, risk assets are now picking up, nonferrous metals, stock markets, and so on have risen, the overall mood has temporarily improved. Ore prices are strong, the overlay of the epidemic on spot logistics or the formation of a certain impact. Phase, nickel and stainless steel materials to maintain high wide concussion pattern.

Nickel prices based on low inventory, tight supply and demand will still show high wide fluctuations. In addition, the current LME has low liquidity, so its sensitivity to capital will remain relatively high. Shanghai nickel-wide fluctuations are expected to continue in the 200,000-250,000 yuan wide repeated fluctuation trend. While stainless steel is affected by the stronger nickel pig iron, the cost support continues, but note that under the current demand is not effectively released, the upward space may also be affected, the stage is expected to fluctuate between 20000 and 22,000 yuan. The price of nickel produced such fluctuations, indicating that the price of the natural graphite may also be affected to a certain extent.

According to the above analysis and discussion, the author believes that when using natural graphite as raw material to develop artificial graphite, the following issues need to be paid attention to in terms of technology:

Surface modification of natural graphite. Compared with carbonaceous materials such as petroleum coke and pitch coke, natural graphite has fewer oxygen-containing functional groups on the surface, lower activity, and poorer binding force than coal tar pitch.

Therefore, with natural graphite, especially natural flake graphite as the main raw material, the carbon graphite products prepared according to the artificial graphite production process inevitably have the problem of poor mechanical properties. Appropriate surface treatment of natural graphite is required to increase the content of oxygen-containing functional groups on its surface.

Purification of natural graphite. The purity of carbonaceous raw materials such as petroleum coke and pitch coke is relatively high, and the ash content is usually less than 0.5%, while the purity of natural graphite treated by flotation is relatively low, and the carbon content is usually below 90%.

Therefore, carbon graphite products prepared from natural graphite are often limited in their application fields due to their low purity and poor comprehensive performance. High purification treatment of natural graphite is one of the ways to solve this problem.

The cost of chemical purification is low, but the water consumption in the washing process is large and the pollution is large, while high-temperature purification has the problem of high cost. Some people also think that block graphite can be prepared according to the production process of artificial graphite, and then subjected to high-temperature heat treatment above 2500 ℃.

1648862424671769.png

While the "carbon" phase is graphitized, the impurities in the natural graphite phase are removed, but firstly, the production cost is increased, and secondly, the defects formed after the gasification of impurities often cause the performance of the product to decline.

The particle size of natural graphite. To improve process performance and product performance, in addition to fine-structure carbon-graphite products, most carbon-graphite products need to use different grades of carbonaceous raw materials in the batching process. For some large-sized products, the particle size of carbonaceous raw materials even reaches The flotation-treated natural graphite is often in the form of a fine powder, and the particle size is only tens to hundreds of microns. Therefore, the use of natural graphite as a raw material is limited to the preparation of fine-structure carbon graphite products.

Although natural microcrystalline graphite with different particle sizes can be obtained, due to its low purity and high cost of high-temperature purification, there is no report on the preparation of coarse-structure carbon graphite products using natural microcrystalline graphite as raw material. To solve the problem of the lack of large particles of natural graphite, it is recommended to use the "secondary coke" process in the treatment of carbon black raw materials in the artificial graphite industry.

Volume shrinkage during preparation. In the preparation process of artificial graphite, especially in the graphitization process, since the arrangement of carbon atoms gradually changes to a regular graphite structure, the volume shrinkage of the product is relatively large.

The advantage of this volume shrinkage is that it can increase the density of the product, but when the shrinkage is uneven, it is easy to cause the product to crack. When natural graphite is used as raw material, the density and mechanical properties of the product are lower due to the smaller volume shrinkage during carbonization and graphitization.

In addition, when developing artificial graphite with natural graphite as raw material, it is also necessary to consider the issue of comprehensive production cost.

Since the price of flotation natural graphite is similar to that of calcined petroleum coke and pitch coke, and then purified to a carbon content of 98%, the price of natural graphite is nearly twice that of calcined petroleum coke and pitch coke. In addition to the above-mentioned several carbon graphite products that have formed a large industry, the proposal of most technical routes and technical measures will greatly increase the production cost.

High quality graphite manufacturer

Luoyang Moon & Star New Energy Technology Co., LTD, founded on October 17, 2008, is a high-tech enterprise committed to the research and development, production, processing, sales and technical services of lithium ion battery anode materials. After more than 10 years of development, the company has gradually developed into a diversified product structure with natural graphite, artificial graphite, composite graphite, intermediate phase and other negative materials (silicon carbon materials, etc.). The products are widely used in high-end lithium ion digital, power and energy storage batteries.

If you are looking for graphite or lithium battery anode material, click on the needed products and send us an inquiry:sales@graphite-corp.com

 

 


 

 


The impact of the Russia-Ukraine conflict on the supply and prices of commodities is widening, and commodity prices remain at high levels. There is still great uncertainty about the future price of the product name.

Inquiry us

High Purity Germanium Sulfide GeS2 Powder CAS 12025-34-2, 99.99%

High Purity Molybdenum Boride MoB2 Powder CAS 12006-99-4, 99%

Metal Alloy 8.92g/Cm3 High Purity Polished Copper Plate

Metal Alloy 18.5g/cm3 Polished Tungsten Heavy Alloy Plate

High Purity Nano Hafnium Hf powder CAS 7440-58-6, 99%

Metal Alloy 18g/cm3 High Density Tungsten Alloy Ball

Metal Alloy High Density Tungsten Alloy Rod Grind Surface Tungsten Alloy Bar

High Purity Tungsten Silicide WSi2 Powder CAS 12039-88-2, 99%

High Purity Zirconium Nitride ZrN Powder CAS 25658-42-8, 99.5%

High Purity Titanium Sulfide TiS2 Powder CAS 2039-13-3, 99.99%

High Purity Nano Ag Silver powder cas 7440-22-4, 99%

High Purity 3D Printing Powder 15-5 Stainless Steel Powder

High Purity Calcium Nitride Ca3N2 Powder CAS 12013-82-0, 99.5%

High Purity Chromium Diboride CrB2 Powder CAS 12007-16-8, 99%

High Purity Silicon Sulfide SiS2 Powder CAS 13759-10-9, 99.99%

Supply Magnesium Granules Mg Granules 99.95%

Chromium Sulfide Cr2S3 Powder CAS 12018-22-3, 99.99%

High Purity 3D Printing 304 Stainless Steel Powder

High Purity Colloidal Silver Nano Silver Solution CAS 7440-22-4

High Purity Tungsten Boride WB2 Powder CAS 12007-09-9, 99%

Our Latest Products

High Purity Germanium Sulfide GeS2 Powder CAS 12025-34-2, 99.99%

Germanium Sulfide (GeS2) is a semiconductor compound with the chemical Formula GeS2. It is easily soluble when heated alkali is used, but not in water.Particle size : 100mesh Purity: 99.99% About Germanium Sulfide (GeS2) Powder: Germanium Sulfid…

High Purity Molybdenum Boride MoB2 Powder CAS 12006-99-4, 99%

Molybdenum powder boride is a combination of molybdenum with boron. The chemical formula for molybdenum is MoB2, and the molecular weight is 202.69. Purity: >99%Particle size : 5-10um Molybdenum Boride MoB2 Pulp : Molybdenum-boride consists of moly…

Metal Alloy 8.92g/Cm3 High Purity Polished Copper Plate

Copper products exhibit good electrical conductivity as well as thermal conductivity. They are also ductile, resistant to corrosion, and have a high wear resistance. They are widely used by the electricity, electronics and energy industries. Metal…