# US 10,870,605 B2 · Refractory molded body, compounds, binders, and method for producing same

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- Number: US 10,870,605 B2
- Document ID: US10870605B2
- Status: Granted
- Kind: B2
- Application number: 16/063,044
- Filed: 2016-07-29
- Published: 2018-12-20
- Granted: 2020-12-22
- Earliest claimed: 2016-01-04
- Assignees: Refractory Intellectual Property GmbH & Co. KG
- Applicants: Magnesita Refractories GmbH
- Inventors: Erwan Gueguen; Christos G. Aneziris; Christiane Biermann; Antoine Ducastel
- Web page: https://patentgrep.com/patent/US10870605B2

## CPC

- C04B 35/013: {containing carbon (C04B35/103 takes precedence)}
- C04B 35/04: based on magnesium oxide
- C04B 35/10: based on aluminium oxide
- C04B 35/103: containing non-oxide refractory materials, e.g. carbon (C04B35/106 takes precedence)
- C04B 35/522: {Graphite (C04B35/536 takes precedence)}
- C04B 35/626: Preparing or treating the powders individually or as batches {(pigments for ceramics C09C1/0009); preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B}
- C04B 35/62645: {Thermal treatment of powders or mixtures thereof other than sintering}
- C04B 35/6268: {characterised by the applied pressure or type of atmosphere, e.g. in vacuum, hydrogen or a specific oxygen pressure}
- C04B 35/6303: {Inorganic additives}
- C04B 35/6316: {Binders based on silicon compounds}
- C04B 35/632: Organic additives
- C04B 35/63492: {Natural resins, e.g. rosin}
- C04B 35/66: Monolithic refractories or refractory mortars, including those whether or not containing clay {(making or repairing of linings F27D1/16)}
- C04B 2235/3231: Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B 2235/3418: Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
- C04B 2235/3804: Borides
- C04B 2235/3821: Boron carbides
- C04B 2235/3826: Silicon carbides
- C04B 2235/3843: Titanium carbides
- C04B 2235/3852: Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
- C04B 2235/402: Aluminium
- C04B 2235/425: Graphite
- C04B 2235/428: Silicon
- C04B 2235/48: Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
- C04B 2235/5427: millimeter or submillimeter sized, i.e. larger than 0,1 mm
- C04B 2235/5436: micrometer sized, i.e. from 1 to 100 micron
- C04B 2235/6021: Extrusion moulding
- C04B 2235/6027: Slip casting
- C04B 2235/65: Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B 2235/658: Atmosphere during thermal treatment
- 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

## Abstract

The present invention relates to a compound for making high-temperature-resistant or refractory molded bodies, made up of a mixture of: a refractory or high-temperature-resistant inorganic powder, granules and/or granulate, including a free-flowing compound or a powder made of carbon or also without carbon, a binder, the binder being made of a combination of tannin, lactose, fine-grained silica and aluminum powder, as well as the binder itself, and molded bodies produced from the compound including the binder, and a method of making same.

## Claims

### Claim 1

A compound for making high-temperature-resistant or refractory molded bodies, the compound including a mixture of:
a refractory or high-temperature-resistant inorganic powder, granules and/or granulate, and
a binder made of a combination of tannin, lactose, fine-grained silica and aluminum powder.

### Claim 2 (depends on 1)

The compound defined in claim 1, wherein a proportion of the binder of up to 50 wt. % is added to the compound.

### Claim 3 (depends on 1)

The compound defined in claim 1, wherein the ratio of lactose to tannin is between 0.1:1 and 0.3:1.

### Claim 4 (depends on 1)

The compound defined in claim 1, wherein the fine-grained silica has a particle size smaller than 50 μm.

### Claim 5 (depends on 1)

The compound defined in claim 1, wherein phenolic resin in powder form of up to 30 wt. % based on the mixture of lactose and tannin is added to the binder.

### Claim 6 (depends on 1)

The compound defined in claim 1, wherein further fine-grained additives are added to the binder, namely SiC, B4C, TiC, Si3N4, AIN, TiN, or borides.

### Claim 7 (depends on 1)

The compound defined in claim 1, wherein doped silicon is added to the binder.

### Claim 8 (depends on 1)

The compound defined in claim 1, wherein ethylene glycol is added to the binder in an amount of 0.1 to 5 wt %.

### Claim 9 (depends on 1)

The compound defined in claim 1, wherein the proportion of tannin is greater than the proportion of lactose.

### Claim 10 (depends on 1)

The compound defined in claim 1, wherein the carbon is graphite and/or carbon black and/or carbon fiber material and/or carbon nanotubes (CNTs) and/or graphene and/or carbonized pitch, bitumen or phenolic resin.

### Claim 11

A compound for making high-temperature-resistant or refractory molded bodies, the compound including a mixture of:
a refractory or high-temperature-resistant inorganic powder, granules and/or granulate,
a free-flowing compound or a powder made of carbon, and
a binder made of a combination of tannin, lactose, fine-grained silica and aluminum powder.

### Claim 12 (depends on 11)

The compound defined in claim 11, wherein the ratio of lactose to tannin is between 0.1:1 and 0.3:1.

### Claim 13 (depends on 11)

The compound defined in claim 11, wherein the fine-grained silica has a particle size smaller than 50 μm.

### Claim 14 (depends on 11)

The compound defined in claim 11, wherein phenolic resin in powder form of up to 30 wt. % based on the mixture of lactose and tannin is added to the binder.

### Claim 15 (depends on 11)

The compound defined in claim 11, wherein further fine-grained additives are added to the binder, namely SiC, B4C, TiC, Si3N4, AIN, TiN, or borides.

### Claim 16 (depends on 11)

The compound defined in claim 11, wherein doped silicon is added to the binder.

### Claim 17 (depends on 11)

The compound defined in claim 11, wherein ethylene glycol is added to the binder in an amount of 0.1 to 5 wt %.

### Claim 18 (depends on 11)

The compound defined in claim 11, wherein the proportion of tannin is greater than the proportion of lactose.

### Claim 19 (depends on 11)

The compound defined in claim 11, wherein the carbon is graphite and/or carbon black and/or carbon fiber material and/or carbon nanotubes (CNTs) and/or graphene and/or carbonized pitch, bitumen or phenolic resin.

### Claim 20

A method of making refractory or high-temperature-resistant molded bodies or compounds including a high-temperature-resistant or refractory inorganic powder, granules and/or granulate and a binder, the method comprising the steps of:
adding at least one inorganic coarse granulation of >100 μm and carbon having a combined binder based on tannin, lactose, fine-grained silica and aluminum powder to an inorganic fine granulation of <100 μm to form a mixture;
transforming the mixture via a primary shaping method into a product; and
treating the product thermally before or during use at temperatures greater than 100° C. while excluding oxygen.