Ramming mass for the refractory lining of a metallurgical vessel, method for the placement thereof and metallurgical vessel, in particular blast furnace, comprising a lining using said ramming mass

Patent metadata

Field	Value
Publication number	US-9568246-B2
Application number	US-201214343891-A
Country	US
Kind code	B2
Filing date	Sep 5, 2012
Priority date	Sep 9, 2011
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

A ramming mass for the block lining of at least some of the refractory elements of a refractory lining of a metallurgical vessel such as a blast furnace, said ramming mass being composed of a mixture of a granular phase and a binder phase, wherein the granular phase and/or binder comprises at least one component having a microporous structure or capable of forming a microporous structure by firing during the blast furnace campaign. The ramming mass is in particular intended for forming the joint between two concentric annular assemblies forming a side wall of the vessel or between a lower part of an inner annular assembly and the periphery of one or more refractory layers forming the floor of the vessel.

First claim

The invention claimed is:

1. A ramming mass for producing hot joints when block lining refractory elements of a refractory lining of a metallurgical vessel, the ramming mass comprising:
a granular phase comprising carbon or carbon-based granules having a microporous structure;
a binder comprising at least one component based on tar or polymerising resin, and an additive composed of metallic silicon powder, the binder capable of developing a microporous structure having an average pore size of 2 μm or less on firing at high temperature, by forming SiC whiskers which develop across pores of hardened tarry or polymerised material.

2. The ramming mass according to claim 1 , wherein the binder comprises fine graphite granules.

3. The ramming mass according to claim 1 , wherein the binder comprises agents which protect against erosion by liquid iron.

4. The ramming mass according to claim 1 , wherein the granular phase comprises carbon or carbon-based granules having a microporous structure having an average pore size of 2 μm or less.

5. The ramming mass according to claim 4 , wherein the granular phase is obtained by grinding microporous refractory blocks, waste from cutting microporous refractory blocks or used microporous carbon blocks.

6. A method for producing hot joints between refractory elements of a refractory lining of a metallurgical vessel, the method comprising: placing a ramming mass, as defined in claim 1 , into the joints; and making the binder microporous by firing resulting from an increase in temperature of the metallurgical vessel, after placement of the ramming mass.

7. A method according to claim 6 , wherein said joints are located between two concentric annular assemblies forming a side wall of the vessel and defining therebetween an annular gap filled by said joints.

8. A method according to claim 6 , wherein said joints are located between a lower part of an inner annular assembly making a side wall of the vessel and a periphery of one or more refractory layers forming the floor of the vessel.

9. A metallurgical vessel comprising: a refractory lining formed by an assemblage of a plurality of assemblies of refractory blocks or bricks which, between at least some of these blocks or bricks or assemblies of blocks or bricks, define gaps filled by a joint, wherein the joints are formed on the basis of a ramming mass as defined in claim 1 .

10. A metallurgical vessel according to claim 9 , wherein the joint is formed between two concentric annular assemblies forming a side wall of the vessel, and defining therebetween an annular gap filled by said joint.

11. A metallurgical vessel according to claim 9 , wherein the joint is formed between a lower part of an inner annular assembly making a side wall of the vessel and a periphery of one or more refractory layers forming the floor of the vessel.

12. A metallurgical vessel according to claim 9 , wherein the vessel comprises a blast furnace.

13. The ramming mass according to claim 3 , wherein the agents comprising at least one of TiC and TiO 2 .

14. A metallurgical vessel comprising:
a refractory lining formed by an assemblage of a plurality of assemblies of refractory blocks or bricks which, between at least some of these blocks or bricks or assemblies of blocks or bricks, define gaps filled by a joint,
wherein the joints are formed by the method according to claim 6 .

15. A metallurgical vessel according to claim 14 , wherein the joint is formed between two concentric annular assemblies forming a side wall of the vessel, and defining therebetween an annular gap filled by said joint.

16. A metallurgical vessel according to claim 14 , wherein the joint is formed between a lower part of an inner annular assembly making a side wall of the vessel and a periphery of one or more refractory layers forming the floor of the vessel.

17. A metallurgical vessel according to claim 14 , wherein the vessel comprises a blast furnace.

Assignees

• Piret Jacques
• Wurth Paul Sa

Inventors

• Piret Jacques

Classifications

• C04B2235/3232

  Titanium oxides or titanates, e.g. rutile or anatase · CPC title

• C04B2235/425

  Graphite · CPC title

• C04B37/005

  consisting of glass or ceramic material · CPC title

• C04B2235/3843

  Titanium carbides · CPC title

• F27B1/14

  Arrangements of linings · CPC title