CA1184737A - Prefabricated multiple density blast furnace runner - Google Patents
Prefabricated multiple density blast furnace runnerInfo
- Publication number
- CA1184737A CA1184737A CA000397007A CA397007A CA1184737A CA 1184737 A CA1184737 A CA 1184737A CA 000397007 A CA000397007 A CA 000397007A CA 397007 A CA397007 A CA 397007A CA 1184737 A CA1184737 A CA 1184737A
- Authority
- CA
- Canada
- Prior art keywords
- runner
- hot metal
- runner unit
- set forth
- mass
- 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
Links
Landscapes
- Furnace Charging Or Discharging (AREA)
Abstract
ABSTRACT
A hot metal runner unit comprises a trough-like body member formed of multi-layered mass coalesced by physical force not under thermal influence with each of said multi-layers being of a different density and having a known predetermined lifetime when subjected to molten metal flowing therethrough.
A hot metal runner unit comprises a trough-like body member formed of multi-layered mass coalesced by physical force not under thermal influence with each of said multi-layers being of a different density and having a known predetermined lifetime when subjected to molten metal flowing therethrough.
Description
73~
Background of the Inven-tion -(1) Field o-f the Invention This invention relates to hot metal runners as used in the metal producing industry for delivering molten metal from a source to a remote point.
Background of the Inven-tion -(1) Field o-f the Invention This invention relates to hot metal runners as used in the metal producing industry for delivering molten metal from a source to a remote point.
(2) Description of the Prior Art:
Runners for handling ho-t metal are disclosed in U.S.
Patents 3,17~L,739 of March 23, 19~5 to Miller, ~ 9,172 of of Aug. 2, 1977 to Yoshida and 3,600,480 of Aug. 17, 1971 to Parsons.
The runner of U.S. Patent 4,039,172 is a mass of refrac-tory material coalesced under the influence of physical force with metal reinforcement members therein, -the refractory material being one selected from -those usable for conventional fire bricks such as clay. The metal rein-forcement comprises flat bars and angles welded to one another to form a reinforc-ing skeleton in which the molding material is placed and sub-jected to physical force. A die is used to con-tain the rein-forcing skeleton and the molding material during the compac-tion of the material into a coalesced mass of a uniform density throughout.
In the present invention, the blast furnace runner unit is formed of layers of re:eractory material selected from those usable eor conventional fire bricks such as clay and a suitable binder with each of the superimposed layers de:eining a cross sectionally trough-like configuration and of a different ..
~8473~
density with the first or lowermost layer being compacted to the greatest density and the succe~sive layers thereon compac.
ted to progressively lesser densities, In the runner disclosed in Patent 3,174,739, a metal shell contains a refractory lining which is formed of a permanent monolithic layer with a semi-permanent layer overlying the monolithic layer except as the discharge or nose end thereof.
The semi-permanent layer is ~ormed o-f magnesite or dolomite, The novelty in the patent relates to a nose formed on the discharge end of the runner of a refractory such as fire clay, crushed fire brick and black pitch with water to form a mortar which is applied as an end or nose over the monolithic layer and the semi-permanent layer of the runner. The disclosure therefore includes the metal shell, the two layers of appropri~
ate material, which are not compacted, with the additiGn of the nose formed of the patching material including the black pitch.
This disclosure differs from the present invention in -that there is no suggestion of the multiple layer mass formed of the refractory ma-terial with each o~ the layers being compacted to a different density.
U.S. Patent 3,600,480 relates to a process of repairing runners and incidentally discloses a runner in which the metal engaging uppermost surface termed an inside lining in the patent, is formed of a composition of carbon and clay with a so-called outslde lining made of sillcon carbide brick with the entire trough-like shape having a base of a still 28 different material, The novelty in the patent relates to a .
~L~8~73~7 patch applied to a worn away portion of the carbon-and clay inside lining, the patch material comprising a mi~ture of particles of pitch and particles of carbon such as fine coke and pitch, which are no-ted in the patent as producing the highest density mentioned.
The structure of the runner disclosed is of uniform density as the same is not compacted by forceO
In the present invention, the hot metal runner discloses the successive layers of compacted materials O:e different densities with no carbon or pitch in be-tween any of the layers as such materials would adversely affec-t the ability of the layers of the hot metal runner to adhere together, The prior art runners are therefore primarily of uniform density and with the exception of the disclosure of U,S. Patent 4,039,172, are formed under -thermal influence as heretofore customary in the art relating to the formation o.E refractory articles, Summary of the Invention The present invention relates to a runner -for receiving and guiding molten me-tal from a blast furnace or the like, the runner being formed of prefabrica-ted uni-ts incorporating superimposed layers of refractory material o:E known differing densities compacted to :Eorm a desired shape. The use of the runners disclosed herein in forming a desired flow pattern on a pouring floor permits a rapid and relatively easy -forma-tion o-E the complete hot metal runner with the multiple layered units readily indicating -their degree of wear and the remaining 28 known li~e .after each pour of metal therethrough due to the ~L~ !34737 di-fferent visual characteristics of the layers of different densities of refractory material.
It will thus be seen that the use o- the herein disclosed prefabricated multiple density hot metal runner units and the visual determination of their state of wear made possible by their formation enables individual units of a complete runner pattern or a pouring floor to be replaced as necessary between pours to insure the retention of a desirable metal holding and guiding runner throughout a hot metal pour.
In a preferred embodiment as described herein, the material of the hot metal runner is formed in the desired shape as by ramming or impaction in a body built up of progressively rammed or packed layers. By maintaining a desired shape of the runner a hard refractory cap can be used to cover the runner and the mol-ten metal therein and thus confine the smoke and fumes and flames normally associated with moving molten metal so that they can be collected at spaced points in a practical manner preventing atmospheric pollution.
Description of the Drawings Figure 1 is a perspective view of several of the modular runner units assemb:led in end to end relation with parts of one of the units bei.ng broken away ancl shown in cross section;
Figure 2 is a sectional elevation of one of the runners of Figure 1 showing attachment means installed in openings preformed in the runner units;
Figure 3 is a side elevation of one of the runner units 28 as seen in Figure 1; and 73~
Figure 4 is a composite view showing a hot metal runner in cross section embedcled in a pouring floor with -the multiple layers of different densities in the unit illustrated together with a refractory cap for enclosing the hot metal trough defined by the hot metal runner units.
Description of th_ Preferred Embodiment By referring to the drawings and Figure 1 in particular, it will be seen that a portion of a hot metal runner has been disclosed as being formed of a plurality of modular units, each of which is generally indicated by the numeral 10 and each of which has substantially vertical spaced side walls 11 and 12 and a bottom 13.
As illustrated in ~igures 1 and 2 of the drawings, each of the runner units 10 is shaped to provide a trough 14 througb.
which molten metal, such as iron from a blast furnace or steel from an open hearth or the like, can be clirected. The runner units may be of various practical sizes capable of handling the flow of metal from the tap hole of the furnace and each of the modular runner units 10 is preferably formed with stepped extensions 15 axially -thereof which are adapted to register in inwardly stepped shoulders 16 in the opposite end of the adjacent modular runner unit 10. The outwardly stepped extensions 15 and the inwardly stepped shoulders 16 are best illustrated in Figure 3 O:e the draw:ings and by referring again to Figure 1 of the drawings, it will be seen that the end to end alignment of the modular runner unit 10 is defined by the face to face engagement of -the stepped extensions 15 and the stepped 28 shoùlders 16, Still referring to Figure 1. of the drawings, it will be observed that the cross section of the modular runner unit 10 appearing at the right hand portion of Figure 1 illustrates in exaggerated degree the formation of each of the modular runner units 10 of a plurali-ty of layers of compacted refrac-tory material 17, 18 and 19 respectively with each of the compacted layers 17, 18 and 19 respectively bei,ng of cliffer-ent degreees of density as indicated by the difference in the shading in the drawing, the outermost layer 17 being compacted to the greatest density, the intermediate layer 18 being compacted to a density less than -that of the outermost layer 17 and the innermost layer 19 being compacted to a density less than the density of the inermediate layer 18.
This compaction of the multiple layers 17, 18 and 19 of the hot metal runner unit 10 by physical force such as ram-ming or packing produces a mass coalesced capable of shape retention and having a predetermined life expectancy when holding and guiding molten metal directed therethrough.
Still~referring to ~igure 1 of the drawings, it will be observed that there are a plurality of openings 20 formed in the upper parallel top edges of -the runner units 10 and by referring to Figure 2 of the drawings it will be seen, that fastener formations including sleeves 21 and eyelet carrying bolts 22 can be engaged therein so that the individual modular runner units 10 can be readily handled by mechanicl equipment and positioned in end to end rela-tion ln es-tablishing a desired path or trough for molten metal.
In Figure 4 of the drawings, the metal engaging surface 28 of the trough 14 is illustrated as having a colloidal graphite
Runners for handling ho-t metal are disclosed in U.S.
Patents 3,17~L,739 of March 23, 19~5 to Miller, ~ 9,172 of of Aug. 2, 1977 to Yoshida and 3,600,480 of Aug. 17, 1971 to Parsons.
The runner of U.S. Patent 4,039,172 is a mass of refrac-tory material coalesced under the influence of physical force with metal reinforcement members therein, -the refractory material being one selected from -those usable for conventional fire bricks such as clay. The metal rein-forcement comprises flat bars and angles welded to one another to form a reinforc-ing skeleton in which the molding material is placed and sub-jected to physical force. A die is used to con-tain the rein-forcing skeleton and the molding material during the compac-tion of the material into a coalesced mass of a uniform density throughout.
In the present invention, the blast furnace runner unit is formed of layers of re:eractory material selected from those usable eor conventional fire bricks such as clay and a suitable binder with each of the superimposed layers de:eining a cross sectionally trough-like configuration and of a different ..
~8473~
density with the first or lowermost layer being compacted to the greatest density and the succe~sive layers thereon compac.
ted to progressively lesser densities, In the runner disclosed in Patent 3,174,739, a metal shell contains a refractory lining which is formed of a permanent monolithic layer with a semi-permanent layer overlying the monolithic layer except as the discharge or nose end thereof.
The semi-permanent layer is ~ormed o-f magnesite or dolomite, The novelty in the patent relates to a nose formed on the discharge end of the runner of a refractory such as fire clay, crushed fire brick and black pitch with water to form a mortar which is applied as an end or nose over the monolithic layer and the semi-permanent layer of the runner. The disclosure therefore includes the metal shell, the two layers of appropri~
ate material, which are not compacted, with the additiGn of the nose formed of the patching material including the black pitch.
This disclosure differs from the present invention in -that there is no suggestion of the multiple layer mass formed of the refractory ma-terial with each o~ the layers being compacted to a different density.
U.S. Patent 3,600,480 relates to a process of repairing runners and incidentally discloses a runner in which the metal engaging uppermost surface termed an inside lining in the patent, is formed of a composition of carbon and clay with a so-called outslde lining made of sillcon carbide brick with the entire trough-like shape having a base of a still 28 different material, The novelty in the patent relates to a .
~L~8~73~7 patch applied to a worn away portion of the carbon-and clay inside lining, the patch material comprising a mi~ture of particles of pitch and particles of carbon such as fine coke and pitch, which are no-ted in the patent as producing the highest density mentioned.
The structure of the runner disclosed is of uniform density as the same is not compacted by forceO
In the present invention, the hot metal runner discloses the successive layers of compacted materials O:e different densities with no carbon or pitch in be-tween any of the layers as such materials would adversely affec-t the ability of the layers of the hot metal runner to adhere together, The prior art runners are therefore primarily of uniform density and with the exception of the disclosure of U,S. Patent 4,039,172, are formed under -thermal influence as heretofore customary in the art relating to the formation o.E refractory articles, Summary of the Invention The present invention relates to a runner -for receiving and guiding molten me-tal from a blast furnace or the like, the runner being formed of prefabrica-ted uni-ts incorporating superimposed layers of refractory material o:E known differing densities compacted to :Eorm a desired shape. The use of the runners disclosed herein in forming a desired flow pattern on a pouring floor permits a rapid and relatively easy -forma-tion o-E the complete hot metal runner with the multiple layered units readily indicating -their degree of wear and the remaining 28 known li~e .after each pour of metal therethrough due to the ~L~ !34737 di-fferent visual characteristics of the layers of different densities of refractory material.
It will thus be seen that the use o- the herein disclosed prefabricated multiple density hot metal runner units and the visual determination of their state of wear made possible by their formation enables individual units of a complete runner pattern or a pouring floor to be replaced as necessary between pours to insure the retention of a desirable metal holding and guiding runner throughout a hot metal pour.
In a preferred embodiment as described herein, the material of the hot metal runner is formed in the desired shape as by ramming or impaction in a body built up of progressively rammed or packed layers. By maintaining a desired shape of the runner a hard refractory cap can be used to cover the runner and the mol-ten metal therein and thus confine the smoke and fumes and flames normally associated with moving molten metal so that they can be collected at spaced points in a practical manner preventing atmospheric pollution.
Description of the Drawings Figure 1 is a perspective view of several of the modular runner units assemb:led in end to end relation with parts of one of the units bei.ng broken away ancl shown in cross section;
Figure 2 is a sectional elevation of one of the runners of Figure 1 showing attachment means installed in openings preformed in the runner units;
Figure 3 is a side elevation of one of the runner units 28 as seen in Figure 1; and 73~
Figure 4 is a composite view showing a hot metal runner in cross section embedcled in a pouring floor with -the multiple layers of different densities in the unit illustrated together with a refractory cap for enclosing the hot metal trough defined by the hot metal runner units.
Description of th_ Preferred Embodiment By referring to the drawings and Figure 1 in particular, it will be seen that a portion of a hot metal runner has been disclosed as being formed of a plurality of modular units, each of which is generally indicated by the numeral 10 and each of which has substantially vertical spaced side walls 11 and 12 and a bottom 13.
As illustrated in ~igures 1 and 2 of the drawings, each of the runner units 10 is shaped to provide a trough 14 througb.
which molten metal, such as iron from a blast furnace or steel from an open hearth or the like, can be clirected. The runner units may be of various practical sizes capable of handling the flow of metal from the tap hole of the furnace and each of the modular runner units 10 is preferably formed with stepped extensions 15 axially -thereof which are adapted to register in inwardly stepped shoulders 16 in the opposite end of the adjacent modular runner unit 10. The outwardly stepped extensions 15 and the inwardly stepped shoulders 16 are best illustrated in Figure 3 O:e the draw:ings and by referring again to Figure 1 of the drawings, it will be seen that the end to end alignment of the modular runner unit 10 is defined by the face to face engagement of -the stepped extensions 15 and the stepped 28 shoùlders 16, Still referring to Figure 1. of the drawings, it will be observed that the cross section of the modular runner unit 10 appearing at the right hand portion of Figure 1 illustrates in exaggerated degree the formation of each of the modular runner units 10 of a plurali-ty of layers of compacted refrac-tory material 17, 18 and 19 respectively with each of the compacted layers 17, 18 and 19 respectively bei,ng of cliffer-ent degreees of density as indicated by the difference in the shading in the drawing, the outermost layer 17 being compacted to the greatest density, the intermediate layer 18 being compacted to a density less than -that of the outermost layer 17 and the innermost layer 19 being compacted to a density less than the density of the inermediate layer 18.
This compaction of the multiple layers 17, 18 and 19 of the hot metal runner unit 10 by physical force such as ram-ming or packing produces a mass coalesced capable of shape retention and having a predetermined life expectancy when holding and guiding molten metal directed therethrough.
Still~referring to ~igure 1 of the drawings, it will be observed that there are a plurality of openings 20 formed in the upper parallel top edges of -the runner units 10 and by referring to Figure 2 of the drawings it will be seen, that fastener formations including sleeves 21 and eyelet carrying bolts 22 can be engaged therein so that the individual modular runner units 10 can be readily handled by mechanicl equipment and positioned in end to end rela-tion ln es-tablishing a desired path or trough for molten metal.
In Figure 4 of the drawings, the metal engaging surface 28 of the trough 14 is illustrated as having a colloidal graphite
3~8~73~
coating 23, the colloidal graphi-te incorporating submicron particle size graphite in a liquid suspension applied to the inner surface of the inner layer 19 of the modular runner unit 10 .
The illustrations in the Figures of the drawings are exaggerated and shaped to indicate the dif-ferent degrees of compaction of the layers 17, 18 and 19 heretofore described in connec-tion with the differen-t densities and in the ~igures of the drawings it will be seen that although lines are shown between the multiple layers 17, 18 and 19 of different densities, the actual modular runner unit 10 is formed of the same refrac-tory material such as clay rammed or packed or otherwise subjected to the influence of physical force but not -thermally influenced to form a coalesced mass having the desired multiple layers of di:fferent densities.
It has been determined that by compacting or ramming or otherwise coalescing the material from which the modular runner units 10 are formed to different degrees of density, the life of the modular units :L0 and the runner trough or path formed of a plurality of such units can be predetermined to match a desired metal conducting time.
It has also been determined that the clay ingredient heretofore mentioned can be used by itself or in mi.xture includ-ing dolomite, sand, granulated slag and ground fired clay. A
suitable bonding material may comprise resin urea formaldehyde or sodium silicate although other types of phenolic resins or other glue or glue-like binders may be employed.
28 It will occur to those skilled in the art -that various changes and modifications may be made in the inv0ntion disclosed herein without departing from the spirit of the 3 invention.
coating 23, the colloidal graphi-te incorporating submicron particle size graphite in a liquid suspension applied to the inner surface of the inner layer 19 of the modular runner unit 10 .
The illustrations in the Figures of the drawings are exaggerated and shaped to indicate the dif-ferent degrees of compaction of the layers 17, 18 and 19 heretofore described in connec-tion with the differen-t densities and in the ~igures of the drawings it will be seen that although lines are shown between the multiple layers 17, 18 and 19 of different densities, the actual modular runner unit 10 is formed of the same refrac-tory material such as clay rammed or packed or otherwise subjected to the influence of physical force but not -thermally influenced to form a coalesced mass having the desired multiple layers of di:fferent densities.
It has been determined that by compacting or ramming or otherwise coalescing the material from which the modular runner units 10 are formed to different degrees of density, the life of the modular units :L0 and the runner trough or path formed of a plurality of such units can be predetermined to match a desired metal conducting time.
It has also been determined that the clay ingredient heretofore mentioned can be used by itself or in mi.xture includ-ing dolomite, sand, granulated slag and ground fired clay. A
suitable bonding material may comprise resin urea formaldehyde or sodium silicate although other types of phenolic resins or other glue or glue-like binders may be employed.
28 It will occur to those skilled in the art -that various changes and modifications may be made in the inv0ntion disclosed herein without departing from the spirit of the 3 invention.
Claims (6)
1. A hot metal runner unit comprising an elongated trough-like body member having a base and spaced parallel upstanding side sections wherein said runner unit is a multi-layered mass coalesced by physical force not under thermal influence with each of said multi-layers being of a different density and having a known predetermined life-time when subjected to molten metal flowing therethrough.
2. The hot metal runner unit set forth in Claim 1 and wherein the mass comprises material selected from those usable for fire bricks.
3. The hot metal runner unit set forth in Claim 1 and wherein the mass is refractory material.
4. The hot metal runner unit set forth in Claim 1 and wherein the mass of the unit is formed progressively of several layers, each compacted to a different degree of thickness.
5. The hot metal runner unit set forth in Claim 1 and wherein a graphite coating is penetrated into the ex-posed surface of said unit and the graphite is applied as a sub-colloidal particle size in a liquid carrier.
6. The hot metal runner runner unit set forth in Claim 1 and wherein the opposite ends of said runner unit are stapped, one end inwardly and one end outwardly, so as to form interengaging configurations on adjacent runner units in axial alignment and engagement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000397007A CA1184737A (en) | 1982-02-24 | 1982-02-24 | Prefabricated multiple density blast furnace runner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000397007A CA1184737A (en) | 1982-02-24 | 1982-02-24 | Prefabricated multiple density blast furnace runner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1184737A true CA1184737A (en) | 1985-04-02 |
Family
ID=4122161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000397007A Expired CA1184737A (en) | 1982-02-24 | 1982-02-24 | Prefabricated multiple density blast furnace runner |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1184737A (en) |
-
1982
- 1982-02-24 CA CA000397007A patent/CA1184737A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1158834A (en) | Prefabricated consumable blast furnace runner | |
| US4350325A (en) | Prefabricated multiple density blast furnace runner | |
| US4194730A (en) | Molten metal handling vessels | |
| CA1177643A (en) | Refractory gas-permeable structural unit | |
| AU610697B2 (en) | Gas-permeable block for metallurgical operations | |
| US4328957A (en) | Prefabricated multiple density blast furnace runner | |
| CA1184737A (en) | Prefabricated multiple density blast furnace runner | |
| US4526351A (en) | Slag and hot metal runner system | |
| US3963815A (en) | Method of lining molten metal vessels and spouts with refractories | |
| RU2098731C1 (en) | Method of brick-laying of refractory lining in metallurgical reservoirs with inclined or taper section of walls and feather-edge refractory brick for realization of this method | |
| CN106735151A (en) | The compound building method of ladle builds ladle by laying bricks or stones with compound | |
| CA1075898A (en) | Vessels for containing molten metals | |
| US4372544A (en) | Blast furnace trough and liner combination | |
| US5118085A (en) | Steel ladle lip closure apparatus | |
| US4673167A (en) | Method for installing a converter bottom | |
| US4573668A (en) | Slag and hot metal runner systems | |
| CA2006112A1 (en) | Injection device | |
| GB2134234A (en) | Blast furnace trough and liner combination | |
| EP0083702A1 (en) | Water cooled refractory lined furnaces | |
| RU2167206C1 (en) | Tuyere for bottom blowing of metal, method for making tuyere and apparatus for its embodiment | |
| CA1203980A (en) | Blast furnace trough and liner combination | |
| GB2109517A (en) | Improvements in brick-formed basic refractory linings for metallurgical furnaces | |
| JPS5843354B2 (en) | Manufacturing method of fireproof bricks with built-in reinforcing bars | |
| GB1603400A (en) | Shields for slide gates | |
| CA2032020C (en) | Method for producing ultra clean steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |