# US 10,308,513 B2 · Method for producing graphite bodies

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- Number: US 10,308,513 B2
- Document ID: US10308513B2
- Status: Granted
- Kind: B2
- Application number: 15/913,293
- Filed: 2018-03-06
- Published: 2018-07-12
- Granted: 2019-06-04
- Earliest claimed: 2015-11-13
- Assignees: Showa Denko Carbon Germany GmbH
- Applicants: Showa Denko Carbon Germany GmbH
- Inventors: Wilhelm Frohs; Rainer Schmitt
- Web page: https://patentgrep.com/patent/US10308513B2

## CPC

- C01B 32/205: Preparation
- C04B 35/522: {Graphite (C04B35/536 takes precedence)}
- C04B 35/532: containing a carbonisable binder
- C01P 2006/40: Electric properties
- C04B 2235/422: Carbon
- C04B 2235/616: Liquid infiltration of green bodies or pre-forms
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- C04B: LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE {(roofing granules E04D7/005)}; CERAMICS (devitrified glass-ceramics C03C10/00); REFRACTORIES; TREATMENT OF NATURAL STONE
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

## Abstract

A method for the production of graphite bodies, including the step of provisioning a mixture including a high-temperature treated anthracite having a high vitrinite content and provisioning at least one binder coke precursor. The method also includes the steps of forming a green body from the mixture provided in the provisioning step, and carbonizing and graphitizing the green body.

## Claims

### Claim 1

A method for the production of graphite bodies, comprising the following steps:
a) provisioning a mixture including a high-temperature treated anthracite having a high vitrinite content and provisioning at least one binder coke precursor;
b) forming a green body from said mixture provided in step a); and
c) carbonizing and graphitizing said green body from step b), wherein a share of the high-temperature treated anthracite is 70 to 95 weight-% and a share of said at least one binder coke precursor is 5 to 30 weight-%.

### Claim 2 (depends on 1)

The method according to claim 1, wherein in step c) following carbonization and prior to graphitization, there is included a step of impregnating said green body with a pitch.

### Claim 3 (depends on 2)

The method according to claim 2, wherein up to two steps of impregnating said green body with the pitch occur.

### Claim 4 (depends on 1)

The method according to claim 1, wherein said at least one binder coke precursors is selected from a group consisting of at least one of a pitch, a tar, a bitumen, a phenol resin, and a furan resin.

### Claim 5 (depends on 1)

The method according to claim 1, wherein up to 50 weight-% of the high-temperature treated anthracite is replaced with at least one of a petroleum-based and a coal tar pitch-based needle coke.

### Claim 6 (depends on 5)

The method according to claim 5, wherein at least one of the high-temperature treated anthracite, said petroleum-based needle coke, and said coal tar pitch-based needle coke are graded prior to metering.

### Claim 7 (depends on 6)

The method according to claim 6, wherein at least one of the high-temperature treated anthracite, said petroleum-based needle coke, and said coal tar pitch-based needle coke are reduced in size to a plurality of particles prior to at least one of metering and grading.

### Claim 8 (depends on 7)

The method according to claim 7, wherein said plurality of particles have a maximum diameter of up to 25.0 mm.

### Claim 9

A plurality of graphite bodies obtained by a method, comprising the steps of:
a) provisioning a mixture including a high-temperature treated anthracite having a high vitrinite content and provisioning at least one binder coke precursor;
b) forming a green body from said mixture provided in step a); and
c) carbonizing and graphitizing said green body from step b), wherein a share of the high-temperature treated anthracite is 70 to 95 weight-% and a share of said at least one binder coke precursor is 5 to 30 weight-%.

### Claim 10 (depends on 9)

The plurality of graphite bodies of claim 9, wherein said plurality of graphite bodies is in the form of a plurality of graphite electrodes or a plurality of graphite nipples.