graphitizing petroleum coke types

The Behavior of Heat-treated Graphitizing Carbons in …

The wet oxidation of three kinds of heattreated graphitizing carbons, petroleum coke, anthracite and coal coke, in a solution of potassium dichromate in phosphoric acid has been studied in order to

Changes of the Lattice Constants and Crystallite Sizes …

The c o values of the graphitizing carbons, such as the petroleum coke and the pitch coke, were not less than 6.718Å, even when these carbons were heat-treated at 3400 C. It was concluded that the graphitizability of carbon was affected by its original texture even at such a high temperature as 3400°C.

Graphitizability of carbonaceous materials as studied …

Carbon is usually classified into graphitizing and non-graphitizing types [15]. The graphitizing property can be estimated by measuring the graphitization degree, P1.

Thermo-Physical Properties of Petroleum Coke during …

Water cooling of coke (breeze or 30–40 mm lumps) directly after calcining does not harm the basic properties of the coke. 3. Petroleum coke with lump size less than 40 mm should be calcined not

UHP Graphite Electrode, EAF Graphite Electrode | …

UHP Graphite Electrode. UHP graphite electrode are mostly made of 100% high-specifiion needle coke. Compared with HP and RP grades, UHP electrode requires highest technical expertise in each of the main process steps in making them, particularly baking, extrusion and graphitizing.

Graphitization - an overview | ScienceDirect Topics

Reactor-grade graphite is made artificially by graphitization of selected petroleum coke (low in neutron absorbers like boron, cadmium, cobalt, etc.). The coke is first heated to drive off volatile matter and then ground and mixed with a coal-tar pitch binder.

Manufacture - EPM Group

Green hodes are exposed to baking in multi-chaer gas-heated Riedhammer kilns at the temperature of 1250 C. Baking cycle is fully automatic and lasts 400-450 hours. GRAPHITIZING. In order to produce hode blocks in grade N-4 the billets are exposed to graphitization process.

Changes of the Lattice Constants and Crystallite Sizes …

The c o values of the graphitizing carbons, such as the petroleum coke and the pitch coke, were not less than 6.718Å, even when these carbons were heat-treated at 3400 C. It was concluded that the graphitizability of carbon was affected by its original texture even at such a high temperature as 3400°C.

Manufacture - EPM Group

Green hodes are exposed to baking in multi-chaer gas-heated Riedhammer kilns at the temperature of 1250 C. Baking cycle is fully automatic and lasts 400-450 hours. GRAPHITIZING. In order to produce hode blocks in grade N-4 the billets are exposed to graphitization process.

(PDF) Study on physical-chemical properties of …

The calcined petroleum cokes are used in production of aluminum anode-grade, graphite electrode, needle-grade, titanium dioxide pigments. Petroleum coke (green and calcined) is produced by the

Artificial Graphite - an overview | ScienceDirect Topics

Among the nongraphitizing carbons were those produced by the pyrolysis of polyvinylidene chloride (PVDC) and sucrose, while graphitizing carbons included those made from polyvinyl chloride (PVC) and petroleum coke. As noted above, the two types of carbon

Structural Changes of Graphitizing Carbons during Graphitization …

1975 (No. 81) Structural Changes of Graphitizing Carbons during Graphitization-Review Table 1 Summary of the published data Fig. 1 The model of coke particle proposed by Kuroda and Akamatsu. 5) graphs in Fig. 2. The interlayer spacing of

Graphite - Wikipedia

Petroleum coke (pet-coke) is a carbonaceous solid derived from oil refinery coker units or other cracking processes. Non petroleum based cokes are made from coal. Marketable (non power plant grades) coke is coke that is essentially pure carbon and can be sold for use as fuel, or for the manufacture of dry cells, electrodes, etc. (i.e., anode grade coke).

William Thomson - MOI Global

• Two types of needle coke: petroleum based needle coke and coal-based pitch needle coke. • UHP GE are made from petroleum needle coke, Ladle GE are made from pitch needle coke. • GEs made from pitch require meaningfully longer bake times (due to higher impurity levels in pitch vs. petroleum

Graphitization of Evaporated Carbon (Journal Article) | …

A process for accomplishing this consists of a compressive heat treatment cycle of 2500 deg C and 3000 psi for 120 minutes on the 65--35 wt% hot-pressed billet with a 50--50 ratio of --100 + 150 mesh and --150 + 320 mesh needle coke as the graphite source. (auth) « less. /p>

Lithium intercalation studies of petroleum cokes of …

1999/9/1· Three separate types of graphitizable petroleum cokes representing a wide range of morphological differences are included in this study. They are characterized as fluid coke (SO2-63-13), Santa Maria pitch coke (SO2-63-16) and LS190 needle-type coke (SO2-63

An Introduction to Synthetic Graphite.

Petroleum coke calcining 8. Not all petroleum coke is created equal 9. Synthetic graphite production a polarized light micrograph of a graphitizing coke known as needle coke. This material is a solid, non-melting, virtually pure carbon residue. The texture of a

The Behavior of Heat-treated Graphitizing Carbons in …

The wet oxidation of three kinds of heattreated graphitizing carbons, petroleum coke, anthracite and coal coke, in a solution of potassium dichromate in phosphoric acid has been studied in order to

Thermo-Physical Properties of Petroleum Coke during …

Water cooling of coke (breeze or 30–40 mm lumps) directly after calcining does not harm the basic properties of the coke. 3. Petroleum coke with lump size less than 40 mm should be calcined not

Graphitization - an overview | ScienceDirect Topics

An examination of a nuer of alloy steels (Wilder et al. 1957) showed that chromium and chromium–molybdenum steels possess good resistance to graphitization. Nickel and nickel–molybdenum steels, however, are prone to graphitization during high-temperature exposure. The deoxidation practice used is also important.

Petroleum coke - Wikipedia

Graphitizing and non-graphitizing carbons (alternatively graphitizable and non-graphitizable carbon) are the two egories of carbon produced by pyrolysis of organic materials. Rosalind Franklin first identified them in a 1951 paper in Proceedings of the Royal Society. In this paper, she defined graphitizing carbons as those that can transform

Graphitizing Workshop-RongXinG

2018/5/4· petroleum coke, asphalt in the melting bath dehydration, melting, in proportion to join the HunNieGuo kneading, and then formed calcined together.With the characteristics of low resistance coefficient used in the electric equipment such as ferroalloys

Graphitization, intercalation, and exfoliation of cokes and …

2002/12/1· Two types of petroleum cokes (coke A and coke B) have been chosen. Coke A is a needle-like anisotropic variety, whereas the coke B is isotropic. Cokes, generally sing, have a lamellar microtexture and are able to graphitize when sufficiently heated.

graphitised petroleum coke instruction

Graphitised petroleum coke is produced by graphitising quality petroleum coke at high temperatures (of over 2,300 C). This type of petroleum coke has a high carbon content, low sulphur content and fewer impurities and it absorbs easily.

William Thomson - MOI Global

• Two types of needle coke: petroleum based needle coke and coal-based pitch needle coke. coke) and longer graphitizing time vs. GE made from Petroleum Needle Coke. Pitch based GEs also have lower efficiency due to higher resistivity. 625 550 605 670

Graphitization - an overview | ScienceDirect Topics

Reactor-grade graphite is made artificially by graphitization of selected petroleum coke (low in neutron absorbers like boron, cadmium, cobalt, etc.). The coke is first heated to drive off volatile matter and then ground and mixed with a coal-tar pitch binder.

A Study of the Mechanism of Petroleum Coke Pyrolysis …

2008/5/15· In this paper, the pyrolysis model given by (1‐α) 3.0 is found to predict the pyrolysis of petroleum coke by thermogravimetric analysis. On this basis, the pyrolysis mechanism of petroleum coke is proposed and the kinetic parameters of four types of petroleum cokes

Characteristics of surface area in non-graphitizing-type …

(1) For graphitizing-type carbons, such as petroleum-coke carbon, 3, 5DMP-F resin carbon and so on, the S^ and Sco2 values are both relatively small, and the values of S^ are much smaller than those of Scor (2) For non-graphitizing-type carbons, the plots of