US2492269A - Fluid cooled member for blast - Google Patents
Fluid cooled member for blast Download PDFInfo
- Publication number
- US2492269A US2492269A US2492269DA US2492269A US 2492269 A US2492269 A US 2492269A US 2492269D A US2492269D A US 2492269DA US 2492269 A US2492269 A US 2492269A
- Authority
- US
- United States
- Prior art keywords
- metal
- blast
- casting
- coating
- water
- 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
Links
- 239000012530 fluid Substances 0.000 title description 6
- 229910052751 metal Inorganic materials 0.000 description 62
- 239000002184 metal Substances 0.000 description 62
- 238000005266 casting Methods 0.000 description 40
- 239000011248 coating agent Substances 0.000 description 32
- 238000000576 coating method Methods 0.000 description 32
- 241000282693 Cercopithecidae Species 0.000 description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 20
- 238000001816 cooling Methods 0.000 description 14
- VYZAMTAEIAYCRO-UHFFFAOYSA-N chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 12
- 229910052804 chromium Inorganic materials 0.000 description 12
- 239000011651 chromium Substances 0.000 description 12
- 238000002844 melting Methods 0.000 description 12
- 239000002893 slag Substances 0.000 description 12
- 229910000906 Bronze Inorganic materials 0.000 description 10
- 239000010974 bronze Substances 0.000 description 10
- 229910052742 iron Inorganic materials 0.000 description 10
- 229910052802 copper Inorganic materials 0.000 description 8
- 239000010949 copper Substances 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 8
- 230000001934 delay Effects 0.000 description 6
- 239000003818 cinder Substances 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 150000002739 metals Chemical class 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 125000000998 L-alanino group Chemical group [H]N([*])[C@](C([H])([H])[H])([H])C(=O)O[H] 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 230000001154 acute Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 231100000078 corrosive Toxicity 0.000 description 2
- 231100001010 corrosive Toxicity 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003628 erosive Effects 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D15/00—Electrolytic or electrophoretic production of coatings containing embedded materials, e.g. particles, whiskers, wires
- C25D15/02—Combined electrolytic and electrophoretic processes with charged materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D45/00—Equipment for casting, not otherwise provided for
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/922—Static electricity metal bleed-off metallic stock
- Y10S428/923—Physical dimension
- Y10S428/924—Composite
- Y10S428/926—Thickness of individual layer specified
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12806—Refractory [Group IVB, VB, or VIB] metal-base component
- Y10T428/12826—Group VIB metal-base component
- Y10T428/12847—Cr-base component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12493—Composite; i.e., plural, adjacent, spatially distinct metal components [e.g., layers, joint, etc.]
- Y10T428/12771—Transition metal-base component
- Y10T428/12861—Group VIII or IB metal-base component
- Y10T428/12903—Cu-base component
Definitions
- This invention relates to improvements in water-cooled members for blast furnaces.
- Figure 1 is a longitudinal section of a blast furnace monkey embodying the teachings of my invention.
- Figure 2 is an end view thereof.
- the numeral 2 designates a hollow water-cooled cast blast furnace monkey, preferably formed of cupreous metal, such'as copper or bronze.
- the monkey provides a passage 4 in the brickwork wall l6 of the blast furnace (not shown) for the removal of the molten slag from the furnace.
- Cooling water is admitted to the monkey 2 through a suitable opening 8 and withdrawn through a similar'opening I 0.
- a baiiie I2 may be provided intermediate the openings 8 and I0 to provide positive circulation of the cooling water through the internal cavity I4 in the cooling member.
- Such -members have the dual function of cooling the brickwork surrounding them and protecting the brickwork from the corrosive action of molten slag withdrawn therethrough.
- the inner exposed end portion I6 and the inside I8 through which the molten material passes are plated with a metal coating 20, the coating metal having a melting point in excess of the hearth temperatures in the furnace.
- the hearth temperatures will not exceed 2600 F. whereby a coating material having a melting point in excess of 2600 F. such as nickel which has a melting temperature of. 2646 F. is quite satisfactory.
- a coating material having a melting point in excess of 2600 F. such as nickel which has a melting temperature of. 2646 F. is quite satisfactory.
- the cupreous water-cooled member without low- ⁇ ering the cooling effect thereof should have a thickness of the order called for by the following v formula:
- cupreous monkeys coated with chromium of the foregoing thickness have a service life in ex- 60 cess of 30 days as compared to the 5 to 6-day 3 average above noted.
- other watercooled members used in blast furnaces such as tuyres, tuyre coolers, bosh cooling plates, shell cooling plates, cinder coolers and the like, may have their life correspondingly increased without lowering the cooling eiliciency thereof.
- a water-cooled member for blast furnaces comprising a hollow casting formed of cupreous metal, said casting having an external layer of metal having a melting point above 2600" F., said external layer having a minimum thickness determined by the formula galt K, AT, L
- a water-cooled member for blast furnaces comprising a hollow casting formed of cupreous metal, said casting having an external layer of metal having a melting point above 2750 F., said external layer having a minimum thickness determined by the formula 2l 3.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Description
Dec. 27, 1949 R. T. COMER, JR FLUID COOLED MEMBER FOR BLAST FURNACES AND THE LIKE Filed Aug. 5, 1948 hummm Ham/ef @Mie/P.,
Patented Dec. 27, 194,9
FLUID COOLED MEMBER FOR BLAST FURNACES AND THE LIKE Robert T. Comer, Jr., Birmingham, Ala., assignor to Tennessee Coal, Iron and Railroad Company, a corporation of Alabama Application August 5, 1948, Serial No. 42,618
(Cl. 26S-38) 4 Claims.
This invention relates to improvements in water-cooled members for blast furnaces.
Due to the high temperatures generated in the hearth and bosh of blast furnaces, such as are used for smelting iron ore, and the erosive action of the molten iron and slag, it is necessary to provide means for cooling brickwork to prolong the life thereof. It has also been found necessary to cool the furnace openings through which the blast is introduced into the hearth, and through which the molten slag is drawn off between castings in order to withstand the intense physical, thermal and chemical action. Although many other metals have been tried, it is the general practice to use water-cooled copper or bronze castings for these purposes. This for the reason in spite of the relatively low melting point for copper or bronze, it holds up better than other metals because of its high coefficient conductivity. However, copper or bronze will not withstand long contact with the molten iron or slag and as a result, the castings are frequently burned, thus releasing waterv into the furnace causing delays in blast furnace operations while the burned castings are replaced. This replacement of burned water-cooled members constitutes a major source of delays in blast furnace operation and likewise some of the most serious interruptions due to chilled hearth and the like are brought on by failures of these Watercooled parts.
The problem of replacement is particularly acute with respect to so-called cinder notch monkeys, i. e., the opening through which the slag is withdrawn from the furnace. Thus, the average life of bronze monkeys, in a blast furnace in accordance with a recent check, was 6.54, 6.93, and 5.98 days, respectively. The average delay for a burned monkey during this period was 28 minutes with a corresponding loss in tonnage and increase in cost.
It is accordingly an object of the present invention to provide water-cooled blast furnace castings having an increased life.
It is another object to reduce delays in blast furnace operation.
It is a further object to provide a blast furnace water-cooled monkey having a materially increased service life.
The foregoing objects will be apparent from the following specification which will particularly describe a blast furnace monkey in conjunction with the attached drawing, wherein:
' Figure 1 is a longitudinal section of a blast furnace monkey embodying the teachings of my invention; and
Figure 2 is an end view thereof.
Referring more particularly to the drawing, the numeral 2 designates a hollow water-cooled cast blast furnace monkey, preferably formed of cupreous metal, such'as copper or bronze. The monkey provides a passage 4 in the brickwork wall l6 of the blast furnace (not shown) for the removal of the molten slag from the furnace. Cooling water is admitted to the monkey 2 through a suitable opening 8 and withdrawn through a similar'opening I 0. A baiiie I2 may be provided intermediate the openings 8 and I0 to provide positive circulation of the cooling water through the internal cavity I4 in the cooling member.
Such -members have the dual function of cooling the brickwork surrounding them and protecting the brickwork from the corrosive action of molten slag withdrawn therethrough. In order to better accomplish this latter function and, in accordance with the teachings of my invention, the inner exposed end portion I6 and the inside I8 through which the molten material passesare plated with a metal coating 20, the coating metal having a melting point in excess of the hearth temperatures in the furnace. With low silicon basic iron, the hearth temperatures will not exceed 2600 F. whereby a coating material having a melting point in excess of 2600 F. such as nickel which has a melting temperature of. 2646 F. is quite satisfactory. However,
the cupreous water-cooled member without low-` ering the cooling effect thereof, should have a thickness of the order called for by the following v formula:
wherein L1=thickness of chromium K1=thermal conductivity of coating metal AT1=temperature drop in coating metal L2=thickness of casting metal Kz-:thermal conductivity of casting metal AT2=temperature drop in casting metal While a coating having a slightly greater thickness may be used, it is essential that coating have a thickness at least as great as that indicated by the foregoing formula.
Actual blast furnace operations have shown that cupreous monkeys coated with chromium of the foregoing thickness, have a service life in ex- 60 cess of 30 days as compared to the 5 to 6-day 3 average above noted. Similarly other watercooled members used in blast furnaces, such as tuyres, tuyre coolers, bosh cooling plates, shell cooling plates, cinder coolers and the like, may have their life correspondingly increased without lowering the cooling eiliciency thereof.
While I have shown and described one specic embodiment of my invention, it will be understood that this embodiment is merely for the purpose of illustration and description and that various other forms may be devised within the scope of my invention, as deiined in the appended claims.
I claim:
1. A water-cooled member for blast furnaces comprising a hollow casting formed of cupreous metal, said casting having an external layer of metal having a melting point above 2600" F., said external layer having a minimum thickness determined by the formula galt K, AT, L
- wherein L1=thickness of the external coating K1=therma1 conductivity of coating metal AT1=temperature drop in coating metal L2=wall thickness of casting metal K2=thermal conductivity of casting metal AT2=temperature drop in casting metal.
2. A water-cooled member for blast furnaces comprising a hollow casting formed of cupreous metal, said casting having an external layer of metal having a melting point above 2750 F., said external layer having a minimum thickness determined by the formula 2l 3. A water-cooled monkey for blast furnaces comprising a hollow casting formed oi cupreous metal, said casting having an external layer of chromium, said chromium layer having a minimum thickness determined by the formula wherein L1=thicknessof the external coating K1=thermal conductivity of coating metal AT1=temperature drop in coating metal L2=wall thickness of casting metal K2=thermal conductivity of casting metal AT2=temperature drop in casting metal.
4. A water-cooled monkey for blast furnaces comprising a hollow casting formed of cupreous metal, said casting having an external layer ot chromium, said chromium layer having a thickness determined by the formula wherein L1=thickness of the external coating K1=therma1 conductivity of coating metal AT1=temperature drop in coating metal Lz=wal1 thickness of casting metal K2=thermal conductivity of casting metal AT2=temperature drop in casting metal ROBERT T. COMER, Jn. REFERENCES CITED The following references are of record in the
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2492269A true US2492269A (en) | 1949-12-27 |
Family
ID=3436799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US2492269D Expired - Lifetime US2492269A (en) | Fluid cooled member for blast |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US2492269A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3015481A (en) * | 1959-12-11 | 1962-01-02 | Archie H Clingensmith | Tuyere assembly |
| DE1226122B (en) * | 1959-09-22 | 1966-10-06 | United States Steel Corp | Water-cooled metallic wind or slag shape |
| FR2476824A1 (en) * | 1980-02-26 | 1981-08-28 | Mannesmann Ag | Mud gun for plugging tap-holes in metallurgical furnaces - where bore of gun is coated with hard chromium to minimise abrasive wear |
| US5409197A (en) * | 1993-02-08 | 1995-04-25 | Davis; Michael | Cooling member for blast furnace tap opening |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1536755A (en) * | 1924-04-09 | 1925-05-05 | Berg Theodor | Tuyere for blast pipes for high and other metallurgical furnaces |
| US1662850A (en) * | 1926-02-15 | 1928-03-20 | Freyn Engineering Co | Tuyere |
| DE462474C (en) * | 1928-07-11 | Gottlieb Seewald | Blast furnace wind shape with a metallic coating | |
| US1829623A (en) * | 1929-11-16 | 1931-10-27 | Gen Electric | Process of treating metals |
-
0
- US US2492269D patent/US2492269A/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE462474C (en) * | 1928-07-11 | Gottlieb Seewald | Blast furnace wind shape with a metallic coating | |
| US1536755A (en) * | 1924-04-09 | 1925-05-05 | Berg Theodor | Tuyere for blast pipes for high and other metallurgical furnaces |
| US1662850A (en) * | 1926-02-15 | 1928-03-20 | Freyn Engineering Co | Tuyere |
| US1829623A (en) * | 1929-11-16 | 1931-10-27 | Gen Electric | Process of treating metals |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1226122B (en) * | 1959-09-22 | 1966-10-06 | United States Steel Corp | Water-cooled metallic wind or slag shape |
| US3015481A (en) * | 1959-12-11 | 1962-01-02 | Archie H Clingensmith | Tuyere assembly |
| FR2476824A1 (en) * | 1980-02-26 | 1981-08-28 | Mannesmann Ag | Mud gun for plugging tap-holes in metallurgical furnaces - where bore of gun is coated with hard chromium to minimise abrasive wear |
| US5409197A (en) * | 1993-02-08 | 1995-04-25 | Davis; Michael | Cooling member for blast furnace tap opening |
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