PDAC 2015 - High Purity Graphite-Final - Zenyatta

• Particle Shape • Surface properties • Particle size distribution Any graphite powders with right properties can be used Bharat Chahar - PDAC 2015 12. Nuclear ... manufactured by a lengthy process from needle coke or from Gilsonite 14. Lubricants High …

Downloads - Particle Shape

Particle thumbnails show crystalline grains with an aspect ratio of about 2:1. Fitting ellipses to these grains gives a good measure of length and width (numbers shown are EEA length). Filtering is not needed for this sample. The size and shape analysis results are below. Particle lengths are between 10 and 200 microns.

Effect of needle‐like crystal shape on measured particle ...

Apr 18, 2016· The effect crystal morphology has on measured particle size distributions (PSDs) is explored, with a focus on particles exhibiting a needle-like habit. An idealized in silico study was performed, targeted at modeling the measurement principles of various particle …

Particle engineering of needle shaped crystals by wet ...

Nov 01, 2018· Particle shape was altered through a combination of wet milling and temperature cycling. Image analysis was used to measure the length and width of the needle shaped particles. Powder handling was quantified using shear cell and bulk density measurements. Roller compaction trials were used to demonstrate improvements in processability.

Global Needle Coke Market Share, Size | Industry Analysis ...

The global needle coke market size was estimated at USD 3.4 billion in 2018, accelerating at a CAGR of 6.9% over the forecast period. Rapidly growing electric vehicles have led to a rise in the demand for needle coke

Effect of needle‐like crystal shape on measured particle ...

Sep 01, 2016· PARTICLE TECHNOLOGY AND FLUIDIZATION Effect of Needle-Like Crystal Shape on Measured Particle Size Distributions Ian de Albuquerque and Marco Mazzotti ETH Zurich, Institute of Process Engineering, Sonneggstrasse 3, CH-8092, Zurich, Switzerland David R. Ochsenbein and Manfred Morari ETH Zurich, Automatic Control Laboratory, Physikstrasse 3, CH ...

REFINERY COKE-CONCLUSION POWER, CEMENT INDUSTRIES SHAPE ...

May 20, 1991· Operating pressure of a coker producing needle coke is at least 100 psig at the inlet to the coke drums, rather than 20-30 psig for other coking operations. The operating temperature of a needle ...

Particle Shape - Sympatec

Particle shape and shape descriptors The primary measuring information of image analysis methods is the projected area of a particle. This makes a difference to the laser diffraction and the ultrasonic extinction, because from the projected area additional information can be determined about the shape of the particles, though two-dimensional ...

US Patent for Expandable vinyl aromatic polymers ...

Expandable vinyl aromatic polymers may contain comminuted needle petroleum coke with a polymodal particle size distribution. s obtained from such expandable vinyl aromatic polymers have a reduced thermal conductivity at a reduced density.

Influence of particle shape on the rheological behavior of ...

of particle shape on the rheological behavior of three-phase ... (e.g. xanthan, schizophyllan) viruses or coke particles, is of high interest. Accordingly, the rheology of anisotropic, non-Brownian particle suspensions has been explored for a century ... (needle-shaped), a pair …

Specific surface area, shape, and size of fine carbon ...

Sep 08, 2010· We have studied the specific surface area, shape, and size of fine particles of isotropic and needle cokes and isotropic graphite. The results demonstrate that, as the average particle size is reduced from 1000 to 1.5 μm, the BET specific surface area of the powders increases from 0.1 to 100 m 2 /g, exceeding the geometric surface area of the particles by a factor of 40–60.

Graphite electrode and needle coke - Qingdao Sino Carbon ...

At present, the needle coke produced by various enterprises is usually compared with the commercial performance indicators of foreign needle coke by conventional performance indicators, such as ash content, true density, sulfur content, nitrogen content, particle size …

US20050284793A1 - Process for the production of needle ...

A process is disclosed for producing needle coke from heavy atmospheric distillation residues having sulfur no more than 0.7 wt %, which process involves the steps of heating the feedstock to a temperature in the range of 460 to 540° C. for thermal cracking in a soaking column under pressure in the range of 1 to 10 kg/cm 2 to separate the easily cokable material, separating the cracked ...

Advanced Carbon Materials - Himadri

Coke Granules: Coke granules with less than 10mm size and can be milled as per the final requirements. Coke Powder: Coke powder with 10 to 20micron size powder with random and round edged shape particle. Synthetic Graphite Powder: This product is based on the coke, which is manufactured from coal tar using our custom technology.

Effect of crystallinity and particle size on coke-based ...

10%· Nov 03, 2020· Needle coke and regular coke were selected as raw materials and pulverized to 2–25 μm to determine the effects of crystalline properties on particle shape after pulverization. Needle coke …

Cytotoxicity of hydroxyapatite nanoparticles is shape and ...

Mar 14, 2012· Specifically, needle- and plate-shaped nHA induced the most significant cell-specific cytotoxicity and IL-6 expression but showed the least particle–cell association. Taken collectively, we demonstrated the shape-dependent effects of nHA on cytotoxicity, inflammatory cytokine expression and particle–cell association.

Metal Powders - Matmatch

Needle shaped: Sharp: polyhedral shape or edged: Granular: Having approximately an equidimensional, irregular shape: ... Definition of particle shape. Retrieved from Ref. 1. ... The crushed metal oxide can be reduced to a powdered form when it is mixed with a carbon source such as coke and heated to a temperature below the melting point in a ...

Investigation of the materials and paste relationships to ...

The last part of experiments was conducted to understand the effect of particle shape and particle density on the packing and compaction properties. Apparent density of particles, vibrated bulk density and Scott density were measured for different size fractions of 5 sources of sponge coke. Anode pastes were made from the cokes and compacted.

Solving Powder Challenges Webinar - Horiba

Influence of size and shape Particle size and size distribution directly affect compaction, flow, dissolution, texture, and much more Particle shape less so with some exceptions Together they influence Particle processes, making products Product performance Making measurements So in other words, almost everything

HYDRODYNAMIC FORCES - Clarkson University

Particle Shape Factor The ratio of the resistance of a given particle to that of a spherical particle having the same volume is called the dynamic shape factor of the particle, K. The radius of an equal volume sphere is referred to as the equivalent radius re. Clearly 1/3 re =αβ for prolate spheroids, (27) 1/3 re =αβ− for oblate spheroids ...

MORPHOLOGICAL AND MICROSTRUCTURAL …

coke-1 exhibits needle or ribbonlike shapes which is indicative of- the high anisotropic structure. Bio-coke-2 particles do not seem to be needle-like as bio-coke-1; however, the differences in different directions can be clearly observed (shown in Figure2 (b)). The particles of shot coke, (c) (d) (e ) …

Graphites Scroll | Petrographic Atlas | SIU

There is a large particle of petroleum coke at the left and an anode butt fragment on the right. The zone in the middle has an excess of void space due to a lack of pitch. Note the elongate shape of the voids.

Cokes - Carbon and Graphite

Needle coke. Needle coke is the commonly used term for a special type of coke with extremely high graphitizability resulting from a strong preferred parallel orientation of its turbostratic layer structure and a particular physical shape of the grains. Click here for the production process of needle coke. Typical needle coke properties.