US810059A - Process of preventing the formation of scaffolds in kilns. - Google Patents
Process of preventing the formation of scaffolds in kilns. Download PDFInfo
- Publication number
- US810059A US810059A US27711405A US1905277114A US810059A US 810059 A US810059 A US 810059A US 27711405 A US27711405 A US 27711405A US 1905277114 A US1905277114 A US 1905277114A US 810059 A US810059 A US 810059A
- Authority
- US
- United States
- Prior art keywords
- scaffolds
- kilns
- formation
- preventing
- kiln
- 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
- 238000000034 method Methods 0.000 title description 8
- 230000015572 biosynthetic process Effects 0.000 title description 5
- 239000000463 material Substances 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 11
- 239000000377 silicon dioxide Substances 0.000 description 5
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 230000004907 flux Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/02—Skids or tracks for heavy objects
- F27D3/026—Skids or tracks for heavy objects transport or conveyor rolls for furnaces; roller rails
Definitions
- . ⁇ ly invention relates to method or means for removing masses of fused material which adhere around and to the'sides of kilns or retorts used in sintering or agglomerating finely-divided metalliferous bodies. It has been found in the practical use of kilns usuall employed for this purpose'viz., long cy ind rical' retorts lined with refractory substance adapted to be rotated and in which varyin temperatures are obtained that the fuse materialhas a tendency to adhere to the sides of the retort at some point, usually near the point where the highest degree of temperature is attained, and that it is dithcnlt to remove the same when formed.
- the object of the present invention is to provide a method or means for the easy and speedy removal of such formation without interferin with or stopping the operation of the kiln. accomplish this purpose by means of a suitable chemical age'ntas, for instance calcium lluorid-which is applied at the point where such formation or scaffold occurs and acting as a flux at the temperature attained in the furnace fuses the material and removes said scaffold from the sides of the kiln.
- a suitable chemical age'ntas for instance calcium lluorid-which is applied at the point where such formation or scaffold occurs and acting as a flux at the temperature attained in the furnace fuses the material and removes said scaffold from the sides of the kiln.
- my method I preferably use a kiln or retort provided with a plurality of blowpipcs, one of which I use to bring the material to the proper fusing or partiallyfusing temperature, and the other b owpipe I use to charge calcium lluorid against the material which adheres to and around the sides of the kiln and forms scaffolds for the purpose of fusing and thus removing the same.
- silica a kiln'prod ueing from one hundred and fifty to two hundred tons of nodules from metal- .life'rous material running about five (5%) per cent. of silica will require about two hun d-rcd pounds of calcium fluorid per day, whereas material running about ten (10%) to fifteen (15%) percent. of silica requires three hundred to five hundred pounds of caland cium'fluorid per day to remove the scaffolds that form during the operation of the kiln.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
U N ITED STATES PATENT OFFICE.
. 'ron oonsyinxe, or NEW YoRK, N. .Y., ASSIGNOR To NATIONAL iiE'rALLeReIo COMPANY, or JERSEY orrY, NEW J RsEY, A I UOHPORAIION on NEW, JERsEY.
I No. 810.059.
Specification of Letters Patent. v
FORMATION OF SCAFFOLDS IN KILNS.
Patented Jan. 16, 1906.
Application filed September 5, 1905. Serial No. 277.114.
T!) (1. whom. it may concern.-
Be it known that 1, Ton Conn KING, a citizen of the iinitedStates, residing at New York. in the county of New York and State of New York, have discovered or invented a new and useful Improvement in Methods of Preventing the Formation of Scaifolds in Kilns, of which improvement the following is a description.
.\ly invention relates to method or means for removing masses of fused material which adhere around and to the'sides of kilns or retorts used in sintering or agglomerating finely-divided metalliferous bodies. It has been found in the practical use of kilns usuall employed for this purpose'viz., long cy ind rical' retorts lined with refractory substance adapted to be rotated and in which varyin temperatures are obtained that the fuse materialhas a tendency to adhere to the sides of the retort at some point, usually near the point where the highest degree of temperature is attained, and that it is dithcnlt to remove the same when formed.
The object of the present invention is to provide a method or means for the easy and speedy removal of such formation without interferin with or stopping the operation of the kiln. accomplish this purpose by means of a suitable chemical age'ntas, for instance calcium lluorid-which is applied at the point where such formation or scaffold occurs and acting as a flux at the temperature attained in the furnace fuses the material and removes said scaffold from the sides of the kiln. In carrying out my method I preferably use a kiln or retort provided with a plurality of blowpipcs, one of which I use to bring the material to the proper fusing or partiallyfusing temperature, and the other b owpipe I use to charge calcium lluorid against the material which adheres to and around the sides of the kiln and forms scaffolds for the purpose of fusing and thus removing the same.
I have found in practice that ore low in silica forms few rings or scaffolds and that, on the contrary, ores high" in silica invariably form rings or scaffolds, and as the preponderance of all metalliferous bearing materials have more or,less silica the formationof scaffolds during the treatment of the ore in kilns of the character specified is unavoidable the removal thereof is a matter of vital importance in the operation of such'kilns. Calcium fluorid has the greatestknown affinity for silica, and consequently forms a very powerful flux and readily removes the scaifolds when charged against the same. I have found that a kiln'prod ueing from one hundred and fifty to two hundred tons of nodules from metal- .life'rous material running about five (5%) per cent. of silica will require about two hun d-rcd pounds of calcium fluorid per day, whereas material running about ten (10%) to fifteen (15%) percent. of silica requires three hundred to five hundred pounds of caland cium'fluorid per day to remove the scaffolds that form during the operation of the kiln.
I claim as my invention and desire to secure by Letters Patent i v 1. The herein-described method for removing scaffolds or rings of fused material from the sides of the kiln which consists in charging against said material, forming such rings or scaffolds, calcium fluorid.
2. The herein-described method of removin adhering masses of material from the sides of kilns or retorts which consists in charging against said material a requisite quantity of calcium fluorid to flux the same.
3. The hereindeseribed method for removing adhering masses of fused material from the sides of the kiln which consists in charging a ainst such adhering masses calcium lluorid and maintaining the material at a hi h temperature during the charging of said ca cium fluorid against the same.
' In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.
TOM COBB KING.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US27711405A US810059A (en) | 1905-09-05 | 1905-09-05 | Process of preventing the formation of scaffolds in kilns. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US27711405A US810059A (en) | 1905-09-05 | 1905-09-05 | Process of preventing the formation of scaffolds in kilns. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US810059A true US810059A (en) | 1906-01-16 |
Family
ID=2878540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US27711405A Expired - Lifetime US810059A (en) | 1905-09-05 | 1905-09-05 | Process of preventing the formation of scaffolds in kilns. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US810059A (en) |
-
1905
- 1905-09-05 US US27711405A patent/US810059A/en not_active Expired - Lifetime
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