US1944278A - Refractory lining for crucibles and the like - Google Patents
Refractory lining for crucibles and the like Download PDFInfo
- Publication number
- US1944278A US1944278A US663875A US66387533A US1944278A US 1944278 A US1944278 A US 1944278A US 663875 A US663875 A US 663875A US 66387533 A US66387533 A US 66387533A US 1944278 A US1944278 A US 1944278A
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- US
- United States
- Prior art keywords
- lining
- crucibles
- frusto
- refractory
- refractory lining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/10—Crucibles
Definitions
- the invention relates to certain improvements in refractory linings for crucibles, such as are used for carrying out alumino-thermic reactions, and has for its object to provide a lining made up 5 of molded or pressed sections of plastic refractory material, the sections being so fashioned that, when arranged in superposed relation, they will form a complete lining for the crucible, but, for purposes of shipment or storage, the sections may be nested to form a substantially frusto-conical disk-like unit.
- Fig. 1 is a sectional elevation of the crucible having the improved lining applied thereto.
- Fig. 2 is a sectional elevation of the elements of the lining in nested relation.
- aluminoa-thermic art it is customary to effect the reaction in crucibles provided with refractory linings which are applied in plastic condition to the interior of the crucible, compacted as much as possible, and finally baked.
- a typical lining material is magnesite with a binder of tar or the like, but it has been found that the life of linings of this and similar materials is generally proportional to the density of thelining structure, which is usually produced by direct pressure or by tamping operations.
- the shell of the crucible is of sheet iron or steel, it is obvious that there is a practical limit to the pressing or tamping operation to produce the desired denseness of the lin ng. due to the relatively fragile character of the shell. For this reason.
- h indicates the sheet metal shell of the crucible, which is usually frusto-conical in shape and is provided with a tap 50 hole in the center of the bottom.
- the lining for the shell comprises sections a, b and 0, each comprising a ring-like member, which are frustoconical and which, when superposed in the mannerand form shown in Fig. 1, forms a complete lining for the shell h.
- these ring-like sections may be formed in suitable molds under any desired degree of compression to produce the necessary density of the refractory material and thereby increase the life of the lining.
- the several ringlike sections may be ultimately unitedby a suitable binder.
- the sets are assembled with the'unit elements in nested relation, as shown in Fig. 2.
- the as- Q sembly constituting a frusto-conical disk ofsub stantially uniform thickness.
- the element b fits within element a and the element, 80, 0 fits within element 1) and, as each of these elev ments are of uniform thickness.
- the nesting. of the elements will produce a frusto-conical disk having athickness'of one of the elements and which requires little space for storage and ships ment.
- a lining for crucibles comprising refractory frusto-conical rings adapted to be superposed to form a hollow frusto-conical body and to be nested to form a frusto-conical disk.
- a lining for crucibles comprising refractory frusto-conical rings of equal axial height adapted to be superposed to form a hollow frusto-conical body and to be hosted to form a frusto-c'onical disk.
Description
Jan. 23, 1934. H, SCHULTZ REFRACTORY LINING FOR CRUCIBLES AND THE LIKE Filed April 1, 1933 INVENTOR. flerm mm Jculiz I A TTORNEY Patented Jan. 23, 1934 n REFRACTORY LINING FOR CRUCIBLES THE LIKE
Hermann Schultz, Berlin, Germany Application April 1, 1933, Serial No. 663,875, and in Germany April 29, 1932 2 (llaims.
The invention relates to certain improvements in refractory linings for crucibles, such as are used for carrying out alumino-thermic reactions, and has for its object to provide a lining made up 5 of molded or pressed sections of plastic refractory material, the sections being so fashioned that, when arranged in superposed relation, they will form a complete lining for the crucible, but, for purposes of shipment or storage, the sections may be nested to form a substantially frusto-conical disk-like unit.
The invention is illustrated in the accompanying drawing, in which:-
Fig. 1 is a sectional elevation of the crucible having the improved lining applied thereto.
Fig. 2 is a sectional elevation of the elements of the lining in nested relation.
In the aluminoa-thermic art, it is customary to effect the reaction in crucibles provided with refractory linings which are applied in plastic condition to the interior of the crucible, compacted as much as possible, and finally baked. A typical lining material is magnesite with a binder of tar or the like, but it has been found that the life of linings of this and similar materials is generally proportional to the density of thelining structure, which is usually produced by direct pressure or by tamping operations. When the shell of the crucible is of sheet iron or steel, it is obvious that there is a practical limit to the pressing or tamping operation to produce the desired denseness of the lin ng. due to the relatively fragile character of the shell. For this reason. it has not been feasible to produce linings of maximum density in this type of crucible. Furthermore, for lining vision of a lining for crucibles of this type. which may be made of maximum density, which may be transported and applied wherever needed with a minimum expenditure of time and labor, and
which will take up a minimum of storage and transportation space.
Referring to the drawing, h indicates the sheet metal shell of the crucible, which is usually frusto-conical in shape and is provided with a tap 50 hole in the center of the bottom. The lining for the shell comprises sections a, b and 0, each comprising a ring-like member, which are frustoconical and which, when superposed in the mannerand form shown in Fig. 1, forms a complete lining for the shell h. Obviously, these ring-like sections may be formed in suitable molds under any desired degree of compression to produce the necessary density of the refractory material and thereby increase the life of the lining. When applied to the crucible shell, the several ringlike sections may be ultimately unitedby a suitable binder. v After the individual units of the lining have been fabricated, which includes curing and burning, the sets are assembled with the'unit elements in nested relation, as shown in Fig. 2. the as- Q sembly constituting a frusto-conical disk ofsub stantially uniform thickness. As indicated the element b fits within element a and the element, 80, 0 fits within element 1) and, as each of these elev ments are of uniform thickness. the nesting. of the elements will produce a frusto-conical disk having athickness'of one of the elements and which requires little space for storage and ships ment.
What I claim is:
1. A lining for crucibles, comprising refractory frusto-conical rings adapted to be superposed to form a hollow frusto-conical body and to be nested to form a frusto-conical disk.
2. A lining for crucibles, comprising refractory frusto-conical rings of equal axial height adapted to be superposed to form a hollow frusto-conical body and to be hosted to form a frusto-c'onical disk.
- HERMANN SCHULTZ.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1944278X | 1932-04-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1944278A true US1944278A (en) | 1934-01-23 |
Family
ID=7750642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US663875A Expired - Lifetime US1944278A (en) | 1932-04-29 | 1933-04-01 | Refractory lining for crucibles and the like |
Country Status (1)
Country | Link |
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US (1) | US1944278A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3370840A (en) * | 1965-07-30 | 1968-02-27 | Harbison Walker Refractories | Basic oxygen furnace construction |
US3603050A (en) * | 1969-08-22 | 1971-09-07 | Myron Coleman | Ladle lining |
-
1933
- 1933-04-01 US US663875A patent/US1944278A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3370840A (en) * | 1965-07-30 | 1968-02-27 | Harbison Walker Refractories | Basic oxygen furnace construction |
US3603050A (en) * | 1969-08-22 | 1971-09-07 | Myron Coleman | Ladle lining |
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