US3746771A - Poking device for electric smelting furnace of closed-type - Google Patents
Poking device for electric smelting furnace of closed-type Download PDFInfo
- Publication number
- US3746771A US3746771A US00245146A US3746771DA US3746771A US 3746771 A US3746771 A US 3746771A US 00245146 A US00245146 A US 00245146A US 3746771D A US3746771D A US 3746771DA US 3746771 A US3746771 A US 3746771A
- Authority
- US
- United States
- Prior art keywords
- poking
- protecting cylinder
- furnace
- rod
- aperatures
- 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
- 238000003723 Smelting Methods 0.000 title claims abstract description 15
- 239000002994 raw material Substances 0.000 claims description 11
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 229910001021 Ferroalloy Inorganic materials 0.000 claims description 6
- 238000012856 packing Methods 0.000 claims description 6
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Images
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
- F27D11/00—Arrangement of elements for electric heating in or on furnaces
-
- 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
- F27D3/04—Ram or pusher apparatus
Definitions
- ABSTRACT An improved poking device for extremely high temperature electric smelting furnace of closed-type characterized by an assembly consisting of a water-cooled protecting cylinder fixed inside of the furnace lid to each'of the poking apertures bored therethrough; a
- This invention relates to an electric smelting furnace of closed-type, and more particularly to a poking deare often employed for the sake of good environment around the furnace usually without poking, but sometimes with rotation of the furnace bed so as to prevent the coagulation of charged raw materials.
- a poking means is required when extremely high temperature smelting of a ferroalloy, such as metallic silicon or ferrosilicon containing more than 70 percent silicon, is performed using a closed-type furnace. That is, the coagulation of charged raw materials
- FIG. 1 there are shown two aspects of novel poking assemblies, a and b, and one aspect of an ordinary poking machine, c.
- the length of poking rod 13 connected with the poking machine 14 is not sufficient in order to pierce the end part of the rod 13 through a poking aperture 15 of the furnace into the layer of raw materials 3 as considered from the figure, but still the length of poking machine 14 is too long to be located narrowly between the upper surface of furnace lid 4 and the ceiling of upper floor 9, causing the operation of said poking machine to be very troublesome. Further, the poking rod 13 is exposed to an atmosphere of extremely high temperature in the inner space of furnace lid 4 during the poking operation, resulting in that the rod 13 is liable to bend or melt.
- novel poking assembly according to this invention are schematically shown in a and b of FIG. I.
- the assembly is composed of a water-cooled at the surface layer in such a furnace is so severe that it is not sufficient to adopt a means offurnace bed rotation but is necessary touse a poking machine.
- the length of poking machine on the furnace lid is too long to be located narrowly between the upper furface of furnace lid and the ceiling of upper floor as shown later in FIG. 1, c, causing the operation thereof to be 'very troublesome.
- An object of the present invention is to provide an improved poking device suitable to an electric smelting furnace of closed-type accompanying extremely high temperature operation thereof.
- Another object of the present invention is to provide an improved poking device having a poking machine of comparatively short length.
- FIG. 1 is a diagrammatic and longitudinal sectional view of the lid part of a closed-type smelting furnace, having some poking assemblies of the invention and of the prior art type;
- the numeral 8 indicates the operating floor
- the numeral 5 indicates an electrode holder for each electrode 1, a protecting cylinder 6 for each electrode holder, and a sealing packing 7 between the protecting cylinder 6 and the hole of furnace lid 4 respectively.
- the raw material charging chutes are not shown in FIG. 1.
- poking rod 10 As the part of poking rod 10 existing in the protecting cylinderll is prevented from the high temperature exposure in the lid space, there is no occurrence of bending or melting of the poking rod. Furthermore, the lengths of poking rod 10 and driving machine 12 can be saved as to be shorter than those of ordinary assembly as shown in c of FIG. 1, and so the locating and the handling of these poking assemblies is improved.
- FIG. 2 More detailed construction of the protecting cylinder 11 in FIG. 1 is shown in FIG. 2.
- a protecting cylinder 114 (the water-cooling construction thereof being not shown in the figure) which has a stopping guard lld at the upper end thereof, is inserted into the inner space of water-cooled furnace lid 4 through an aperture 15 of the water-cooled furnace lid 4.
- the poking rod 10 connected with a poking machine (not shown in FIG. 2) is passed up and down through the cylindrical inner space 110 of the protecting cylinder 11a, and is gastightened by means of a stuffing packing box 11b attached to the stopping guard 11d.
- the gap distance 3 between the inner side of protecting cylinder 11a and the poking rod 10 is less than 2 cm.
- the reason for this is as follows.
- the gas generated from the furnace heart contains a large amount of adhesive dust therein, and said dust deposits on the surface of any quiescent position of the furnace. Therefore, the inner space 1 1c of the protecting cylinder 1 la is gradually filled with the dust which deposits on the cylinder wall adhesively, and becomes solid.
- This somewhat resilientsolid deposit rather acts a role of a lubricant and ing assembly which comprises a water-cooled protecting cylinder fixed upon the inside of said furnace lid at each said poking aperatures therethrough, said protecting cylinder surrounding the poking rod which passes through said poking aperature, the lower end of said protecting cylinder reaching almost to the surface level of charged raw materials in the furnace, a stuffing box filled with packing positioned adjacent the upper end of said protecting cylinder and means connected to said poking rod for driving the rod up and down within said protecting cylinder.
- an improved poking assembly which comprises a water-cooled protecting cylinder fixed upon the inside of said furnace lid at each of said poking aperatures, said protecting cylinder surrounding the poking rod which extends through the poking aperature, the lower end of said protecting cylinder reaching almost to the surface level of charged raw materials in the furnace, the gap distance between the inner side of said protecting cylinder and the poking rod which it surrounds being less than 2 0th., a stuffing box filled with packing positioned adjacent the upper end of said protecting cylinder forming a substantially gas tight seal at said upper end between said protecting cylinder and said poking rod and means connected to said poking rod above said furnace lid for driving the poking rod up and down within said protecting cylinder.
- ferroalloy is one selected from the group consisting of metallic silicon and ferrosilicon containing more than percent silicon.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2551671A JPS512886B1 (it) | 1971-04-20 | 1971-04-20 | |
| JP5949271A JPS5113089B2 (it) | 1971-08-06 | 1971-08-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3746771A true US3746771A (en) | 1973-07-17 |
Family
ID=26363134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00245146A Expired - Lifetime US3746771A (en) | 1971-04-20 | 1972-04-18 | Poking device for electric smelting furnace of closed-type |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3746771A (it) |
| CA (1) | CA942809A (it) |
| DE (1) | DE2218188B2 (it) |
| FR (1) | FR2136425A5 (it) |
| IT (1) | IT953683B (it) |
| NO (1) | NO133001B (it) |
| SE (1) | SE372331B (it) |
| YU (1) | YU36070B (it) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4347614A (en) * | 1978-07-18 | 1982-08-31 | Japan Metals & Chemicals Co., Ltd. | Apparatus for refining ferrosilicon |
| US20130004908A1 (en) * | 2010-03-11 | 2013-01-03 | Mitsubishi Chemical Corporation | Method for producing silicon and jig |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI66487C (fi) * | 1980-06-19 | 1984-10-10 | Outokumpu Oy | Anordning foer foerflyttning av fast material som matas pao ytn av en smaelta samt foer krossning av slaggskorpa som bi ldts pao smaeltans yta |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2423787A (en) * | 1944-11-01 | 1947-07-08 | Aluminum Co Of America | Crust breaking apparatus |
| US3448012A (en) * | 1967-02-01 | 1969-06-03 | Marathon Oil Co | Rotary concentric partition in a coke oven hearth |
-
1972
- 1972-04-14 DE DE19722218188 patent/DE2218188B2/de not_active Withdrawn
- 1972-04-14 FR FR7213184A patent/FR2136425A5/fr not_active Expired
- 1972-04-17 CA CA140,203A patent/CA942809A/en not_active Expired
- 1972-04-18 US US00245146A patent/US3746771A/en not_active Expired - Lifetime
- 1972-04-19 YU YU1048/72A patent/YU36070B/xx unknown
- 1972-04-19 NO NO1358/72A patent/NO133001B/no unknown
- 1972-04-19 IT IT2333972A patent/IT953683B/it active
- 1972-04-19 SE SE7205096A patent/SE372331B/xx unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2423787A (en) * | 1944-11-01 | 1947-07-08 | Aluminum Co Of America | Crust breaking apparatus |
| US3448012A (en) * | 1967-02-01 | 1969-06-03 | Marathon Oil Co | Rotary concentric partition in a coke oven hearth |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4347614A (en) * | 1978-07-18 | 1982-08-31 | Japan Metals & Chemicals Co., Ltd. | Apparatus for refining ferrosilicon |
| US20130004908A1 (en) * | 2010-03-11 | 2013-01-03 | Mitsubishi Chemical Corporation | Method for producing silicon and jig |
Also Published As
| Publication number | Publication date |
|---|---|
| YU36070B (en) | 1981-11-13 |
| DE2218188A1 (de) | 1972-10-26 |
| DE2218188B2 (de) | 1977-03-03 |
| SE372331B (it) | 1974-12-16 |
| IT953683B (it) | 1973-08-10 |
| CA942809A (en) | 1974-02-26 |
| YU104872A (en) | 1981-02-28 |
| NO133001B (it) | 1975-11-10 |
| FR2136425A5 (it) | 1972-12-22 |
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