CA1119413A - Process and a device for the treatment of an iron melt - Google Patents
Process and a device for the treatment of an iron meltInfo
- Publication number
- CA1119413A CA1119413A CA000319252A CA319252A CA1119413A CA 1119413 A CA1119413 A CA 1119413A CA 000319252 A CA000319252 A CA 000319252A CA 319252 A CA319252 A CA 319252A CA 1119413 A CA1119413 A CA 1119413A
- Authority
- CA
- Canada
- Prior art keywords
- hollow body
- melt
- receptacle
- pure metal
- iron melt
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/08—Making cast-iron alloys
- C22C33/10—Making cast-iron alloys including procedures for adding magnesium
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/10—Making spheroidal graphite cast-iron
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
Abstract
ABSTRACT OF THE DISCLOSURE
The process for the desulphurization of iron melts provides for standardized, refractory hollow bodies, containing pieces of magnesium and closed on all sides, in which apertures are provided shortly before use. The hollow body is held by a holding member near the base of a conventional casting ladle.
The hollow body can then be covered by pouring over the melt thereby overtreating it, Whereafter the melt is to be diluted by adding untreated melt to form the desired composition. The hollow body is destroyed and is carried to the surface by the melt.
The process for the desulphurization of iron melts provides for standardized, refractory hollow bodies, containing pieces of magnesium and closed on all sides, in which apertures are provided shortly before use. The hollow body is held by a holding member near the base of a conventional casting ladle.
The hollow body can then be covered by pouring over the melt thereby overtreating it, Whereafter the melt is to be diluted by adding untreated melt to form the desired composition. The hollow body is destroyed and is carried to the surface by the melt.
Description
9~3 The invention relates to a process for the treatment of iron melts with a solid pure metal of the alkaline and alkaline-earth type~ particu]arly for desulphurization with pure magnesium. The invention also relates to a device for the carrying out of the process.
Key or hardening alloys containing magnesium are known for the treatment of cast iron melts. The disadvantages of these alloys are high production cos*s and limited use owing to the undesirable substances contained in the alloys in addition to magnesium which are introduced into the melt. For example~ a tiltable treatment receptacle with a fixed com-partment for pure magnesium is known from German Auslegeschrift 1 815 214. The compartment is designed to allow for optimum flow pattern and prevents a floating of the magnesium. However, the tilting device is expensive and pouring into a transport or other ladle is necessary after the treatment, which involves losses in time and temperature. In addition reaction products must be removed from the compartment.
German Auslegeschrift 2 208 960 shows a special con-tainer with a thick walled hollow body secured on a cover withhydrocylinders. The hollow body is in the form of an immersion bulb. Particularly disadvantageous is the heat shock on the immersion bulb during immersion which is detrimental to the service life. A]so, a greater time-lag must be tolerated which is caused by the heat absorption of the immersion bulb. The melt is thereby cooled so that the danger exists that the apertures in the immersion bulb freeze up. The bringing into position and the lowering process of the immersion bulb lead to delays and drops in temperature because the melt must first of all be brought into the treatment receptacle. It is also com-plicated and time consuming to clean the immersion bulb itself.
Moreover, the central position of the immersion bulb is 1 ~3' . - 1 -~ ' unsuitable wi-th regard to flow pattern and.this leads to the US2 of more magnesium.
The object of the present invention is to obviate the disadvantages mentioned before and.to propose an economical method and device.
This object is achieved according to the invention in a process for the treatment of an iron melt with a solid pure metal of the alkallne and alkaline-earth type, involving the use of at least one refractory hollow body made of a material capable of being destroyed by the iron melt and contain:ing the pure metal, process comprising: providing the hollow body with at least two apertures located at different levels and bringing the iron melt entirely to cover the hollow body to cause the pure metal to be melted and/or vaporized by the heat of the melt flowing into the hollow body/ the hollow body being thereby destroyed by the melt.
: According to a specific embodiment of the invention, a treatment receptacle is used and the process.further com-prises: placing the hollow body in the receptacle and pouring the iron melt completely to cover the hollow body whereby the ; melt is treated by the pure metal in the hollow body.
Preferably, the melt is poured into the receptacle to a first level which is lower than the maximum level available in the receptacle so as to overtreat the melt and, subsequently, the melt is diluted by the pourin~ of additional melt up to the : aforesaid maximum level whereby to obtain a Einal melt of predetermined composition.
It is also an object of the present invention to pro-vide a device for the treatment of an iron melt, device com-prising: at least one refractory hollow body made of amaterial capable of being destroyed by said iron melt when the latter is poured thereover; pure solid metal, of the alkaline
Key or hardening alloys containing magnesium are known for the treatment of cast iron melts. The disadvantages of these alloys are high production cos*s and limited use owing to the undesirable substances contained in the alloys in addition to magnesium which are introduced into the melt. For example~ a tiltable treatment receptacle with a fixed com-partment for pure magnesium is known from German Auslegeschrift 1 815 214. The compartment is designed to allow for optimum flow pattern and prevents a floating of the magnesium. However, the tilting device is expensive and pouring into a transport or other ladle is necessary after the treatment, which involves losses in time and temperature. In addition reaction products must be removed from the compartment.
German Auslegeschrift 2 208 960 shows a special con-tainer with a thick walled hollow body secured on a cover withhydrocylinders. The hollow body is in the form of an immersion bulb. Particularly disadvantageous is the heat shock on the immersion bulb during immersion which is detrimental to the service life. A]so, a greater time-lag must be tolerated which is caused by the heat absorption of the immersion bulb. The melt is thereby cooled so that the danger exists that the apertures in the immersion bulb freeze up. The bringing into position and the lowering process of the immersion bulb lead to delays and drops in temperature because the melt must first of all be brought into the treatment receptacle. It is also com-plicated and time consuming to clean the immersion bulb itself.
Moreover, the central position of the immersion bulb is 1 ~3' . - 1 -~ ' unsuitable wi-th regard to flow pattern and.this leads to the US2 of more magnesium.
The object of the present invention is to obviate the disadvantages mentioned before and.to propose an economical method and device.
This object is achieved according to the invention in a process for the treatment of an iron melt with a solid pure metal of the alkallne and alkaline-earth type, involving the use of at least one refractory hollow body made of a material capable of being destroyed by the iron melt and contain:ing the pure metal, process comprising: providing the hollow body with at least two apertures located at different levels and bringing the iron melt entirely to cover the hollow body to cause the pure metal to be melted and/or vaporized by the heat of the melt flowing into the hollow body/ the hollow body being thereby destroyed by the melt.
: According to a specific embodiment of the invention, a treatment receptacle is used and the process.further com-prises: placing the hollow body in the receptacle and pouring the iron melt completely to cover the hollow body whereby the ; melt is treated by the pure metal in the hollow body.
Preferably, the melt is poured into the receptacle to a first level which is lower than the maximum level available in the receptacle so as to overtreat the melt and, subsequently, the melt is diluted by the pourin~ of additional melt up to the : aforesaid maximum level whereby to obtain a Einal melt of predetermined composition.
It is also an object of the present invention to pro-vide a device for the treatment of an iron melt, device com-prising: at least one refractory hollow body made of amaterial capable of being destroyed by said iron melt when the latter is poured thereover; pure solid metal, of the alkaline
2 -.~ .
and alkaline-earth type, in said hollow body; wherein said hollow body is formed with at least two apertures located at different levels thereof and reinforcing means in said hollow body.
Because the hollow body according to the invention is a lost body and therefore only meant to be used once and because it is reinforced, its walls can be made relatively thin and therefore cheap. Cleaning of the hollow body and pouring the treated melt into another container is avoided. Temperature drops because of heat absorption of the hollow body and freezing up of its openings are minimized.
Pouring of the melt to be treated takes place when all the other preliminaries have been taken care of, so that the melt can be poured without either drops in temperature or delays. The actual pouring can also take place in a very short ~- time. Any conventional casting ladle can be used without alteration as a treatment receptacle.
` Embodiments of the invention are described in de~ail with reference to the appended drawing, wherein:
; 20 Fig. 1 is a schematic vertical elevation of a device made accordiny to the invention, Fig. 2 is a vertical cross-section of a hollow body used in the device shown in Fig. 1, and Fig. 3 is a vertical cross-section of another embodiment oE the hollow body.
A cylindrical hollow body 1, illustrated in Figure 2, consisting of a phosphate hardened (hardening temperature under 400C) material reinforced with a wire mesh reinforcement 2, is partially filled with pieces of pure, i.e. not alloyed ; 30 magnesium 3 and is provided with a bolt 7 on its flat upper end and a nut 8 on its lower end. A possible fibre reinforce-ment serves the same purpose. The wall thickness of thP body 1
and alkaline-earth type, in said hollow body; wherein said hollow body is formed with at least two apertures located at different levels thereof and reinforcing means in said hollow body.
Because the hollow body according to the invention is a lost body and therefore only meant to be used once and because it is reinforced, its walls can be made relatively thin and therefore cheap. Cleaning of the hollow body and pouring the treated melt into another container is avoided. Temperature drops because of heat absorption of the hollow body and freezing up of its openings are minimized.
Pouring of the melt to be treated takes place when all the other preliminaries have been taken care of, so that the melt can be poured without either drops in temperature or delays. The actual pouring can also take place in a very short ~- time. Any conventional casting ladle can be used without alteration as a treatment receptacle.
` Embodiments of the invention are described in de~ail with reference to the appended drawing, wherein:
; 20 Fig. 1 is a schematic vertical elevation of a device made accordiny to the invention, Fig. 2 is a vertical cross-section of a hollow body used in the device shown in Fig. 1, and Fig. 3 is a vertical cross-section of another embodiment oE the hollow body.
A cylindrical hollow body 1, illustrated in Figure 2, consisting of a phosphate hardened (hardening temperature under 400C) material reinforced with a wire mesh reinforcement 2, is partially filled with pieces of pure, i.e. not alloyed ; 30 magnesium 3 and is provided with a bolt 7 on its flat upper end and a nut 8 on its lower end. A possible fibre reinforce-ment serves the same purpose. The wall thickness of thP body 1
- 3 -. :.
~IL !l 1~3~3 can be reduced by using the reinforcement 2. The hollow bodies are standardized in sizes of, e.g. 10, 20 or 30 litres and are closed and previously supplied with a certain amount of magnesium, whereby the lower and upper apertures 9 and 10 respectively can be drilled in situ shortly before use. In this way optimum conditions with respect of the actual metal-lurgical state can be obtained. The size of the openings 9 and 10 depends e.g. from the temperature of the melt, the chemical composition and the desired time-lag. Also the storage of Mg-pieces alone which ls not harmless becomes unnecessary. A
hollow body 1 with a volume of 20 litres contains, for example, approximately 12 Kg magnesium which gives an optimal ratio pure metal to hollow body of approximately 0.8. Higher ratios might ; lead to premature explosions through magnesium vapours or des-truction of the hollow body, necessitating thicker walls of the hollow body. In the lower part of the hollow body 1 only one single side opening 9 need be provided. The entire aperture area of the aperture or aper-//
/
/
__ ,. .... ____ .....
: -- 4 --D.
~ .
c tures 9 amounts expediently to 42 mm per Kg of magnesium and the diameter lies approximately between 12 and 30 mm. Pre-ferably about four apertures 10 are provided in the upper part of the hollow body 1~
The hollow body 1 is screwed by the bolts 7 into a holding member in the form o~ a metal holding rod 15 (it can also be welded on) and is located near the base of treatment recep-tacle, a normal~casting ladle 16. The hollow body 1 can also be secu~ed on a sto~per rod or a fixing rod running through the bottom outlet of the lade. It is also possible to arrange : .~
~'` several hollow bodies under (Fig. 3) or beside each other.
: j They~should be preferably located to the side of the vertical longitudinal axis of the ladle 16 and not centrally for reasons of flow technique, so that a high Mg-yield is achievedO
~ .
Por this reason the apertues 9, 10 should not be positioned too near the side of the ladle.
:! . :
The holding rod 15 is provided with a refractory protecting member 18, e.g. out of Croning sand and is connected via a crossbeam 19 to a hydraulic or pneumatic device 20 which can I be raised and lowered. The device 20 can also be rotated in - accordance with arrow 21 so that a second hollow body 1, posi-tioned in readiness on a second holding rod 25 and a second crossbeam 26, can be quickly brought into position cluring a subsequent treatment. The holding rod 15 can, however, also be ~!
1'' ~'' ' :
' i,, ' ~ :
":~
.-:
~9~13 ~i supported, with a view to simplicity, by means of a transverse beam placed on the rim of the ladle.
The ladle 16 is filled to about the half-way level 30 with pig iron melt from a tap ladle 29. Given 40 t pig iron the reaction, which starts after approximately 30 sec., lasts approximately 120 sec. The duration of the reaction delay or time-lag can be controlled by the diameter of the aperture 9 and should be preferably 25 to 30 sec. In this way the treatment ladle can be filled with melt without any magne-sium being lost through premature commencement of the reac-tion. ~t level 30 the bath surface 33 should be at least 50 cm above the highest elevations of the hollow body, as the yield is otherwise insufficient. The upper side of the ladle forms a protection against splashes. It is thus possible for the process to be carried out wlthout a cover. If necessary a suction hood can be provided for dust or fumes. The reaction ` takes place with ~he melt~ at level 30 so that the melt is over-treated and is then topped up with the same untreated melt from the ladle 29 up to the maximum bath depth 31, so that the final composition is obtained by means of dilution.
By topping up with more or less untreated melt the desired sulphur content can be obtained with the standardised magne-sium ~uantities.
The hollow body 35 can also be constructed as a truncated ,1 ' ~-: :
, ~3 cone with i-ts base mounted at the top. The upper apertures 39 can be arranged vertically. The truncated cone base can also be formed as the upper cover which, in the form of a refrac-tory clay plug, is secured with magnesium a-fter the hollow body has been filled. The refractory clay plug can form a connecting piece between the hollow body 1 and an attachment bar or a stopper rod.
The following advantages can generally be gained using the ~ process according to the invention:
',:
- Even given a high initial sulphur content an accurate de-suIphurisation to less than 0.01 ~ S can be achieved.
- Since the hollow body is only used once the operation proves quite simple.
- The slag amount is very small since only very small quantities of pure magnesium are used.
- The iron losses in the slag and during the drawing-off of the slag are slight.
- It can be integrated into the work flow of the steel works and permits the rapid successive treatment of quantities of iron even over 50 Tonnes without long :, ~ ' :
waiting periods thus avoiding correspondingly high drops in temperature, i.e. avoiding interference in the opera-tional procedure.
- A very slight in temperature takes place as a result of an exothermic reaction, e.g. in comparison to soda-desulphurisation.
- The amount of iron splash losses is reduced by the two-stage process (over-treatment/dilution) compared with the single-stage process.
- As experiments have shown, a magnesium yield of 100 %
can be obtained given initial sulphur contents of more than 0.08 %, and - A mere 0.3 to 0.8 Kg magnesium is required per tonne of melt, which leads to a small dust generation.
~IL !l 1~3~3 can be reduced by using the reinforcement 2. The hollow bodies are standardized in sizes of, e.g. 10, 20 or 30 litres and are closed and previously supplied with a certain amount of magnesium, whereby the lower and upper apertures 9 and 10 respectively can be drilled in situ shortly before use. In this way optimum conditions with respect of the actual metal-lurgical state can be obtained. The size of the openings 9 and 10 depends e.g. from the temperature of the melt, the chemical composition and the desired time-lag. Also the storage of Mg-pieces alone which ls not harmless becomes unnecessary. A
hollow body 1 with a volume of 20 litres contains, for example, approximately 12 Kg magnesium which gives an optimal ratio pure metal to hollow body of approximately 0.8. Higher ratios might ; lead to premature explosions through magnesium vapours or des-truction of the hollow body, necessitating thicker walls of the hollow body. In the lower part of the hollow body 1 only one single side opening 9 need be provided. The entire aperture area of the aperture or aper-//
/
/
__ ,. .... ____ .....
: -- 4 --D.
~ .
c tures 9 amounts expediently to 42 mm per Kg of magnesium and the diameter lies approximately between 12 and 30 mm. Pre-ferably about four apertures 10 are provided in the upper part of the hollow body 1~
The hollow body 1 is screwed by the bolts 7 into a holding member in the form o~ a metal holding rod 15 (it can also be welded on) and is located near the base of treatment recep-tacle, a normal~casting ladle 16. The hollow body 1 can also be secu~ed on a sto~per rod or a fixing rod running through the bottom outlet of the lade. It is also possible to arrange : .~
~'` several hollow bodies under (Fig. 3) or beside each other.
: j They~should be preferably located to the side of the vertical longitudinal axis of the ladle 16 and not centrally for reasons of flow technique, so that a high Mg-yield is achievedO
~ .
Por this reason the apertues 9, 10 should not be positioned too near the side of the ladle.
:! . :
The holding rod 15 is provided with a refractory protecting member 18, e.g. out of Croning sand and is connected via a crossbeam 19 to a hydraulic or pneumatic device 20 which can I be raised and lowered. The device 20 can also be rotated in - accordance with arrow 21 so that a second hollow body 1, posi-tioned in readiness on a second holding rod 25 and a second crossbeam 26, can be quickly brought into position cluring a subsequent treatment. The holding rod 15 can, however, also be ~!
1'' ~'' ' :
' i,, ' ~ :
":~
.-:
~9~13 ~i supported, with a view to simplicity, by means of a transverse beam placed on the rim of the ladle.
The ladle 16 is filled to about the half-way level 30 with pig iron melt from a tap ladle 29. Given 40 t pig iron the reaction, which starts after approximately 30 sec., lasts approximately 120 sec. The duration of the reaction delay or time-lag can be controlled by the diameter of the aperture 9 and should be preferably 25 to 30 sec. In this way the treatment ladle can be filled with melt without any magne-sium being lost through premature commencement of the reac-tion. ~t level 30 the bath surface 33 should be at least 50 cm above the highest elevations of the hollow body, as the yield is otherwise insufficient. The upper side of the ladle forms a protection against splashes. It is thus possible for the process to be carried out wlthout a cover. If necessary a suction hood can be provided for dust or fumes. The reaction ` takes place with ~he melt~ at level 30 so that the melt is over-treated and is then topped up with the same untreated melt from the ladle 29 up to the maximum bath depth 31, so that the final composition is obtained by means of dilution.
By topping up with more or less untreated melt the desired sulphur content can be obtained with the standardised magne-sium ~uantities.
The hollow body 35 can also be constructed as a truncated ,1 ' ~-: :
, ~3 cone with i-ts base mounted at the top. The upper apertures 39 can be arranged vertically. The truncated cone base can also be formed as the upper cover which, in the form of a refrac-tory clay plug, is secured with magnesium a-fter the hollow body has been filled. The refractory clay plug can form a connecting piece between the hollow body 1 and an attachment bar or a stopper rod.
The following advantages can generally be gained using the ~ process according to the invention:
',:
- Even given a high initial sulphur content an accurate de-suIphurisation to less than 0.01 ~ S can be achieved.
- Since the hollow body is only used once the operation proves quite simple.
- The slag amount is very small since only very small quantities of pure magnesium are used.
- The iron losses in the slag and during the drawing-off of the slag are slight.
- It can be integrated into the work flow of the steel works and permits the rapid successive treatment of quantities of iron even over 50 Tonnes without long :, ~ ' :
waiting periods thus avoiding correspondingly high drops in temperature, i.e. avoiding interference in the opera-tional procedure.
- A very slight in temperature takes place as a result of an exothermic reaction, e.g. in comparison to soda-desulphurisation.
- The amount of iron splash losses is reduced by the two-stage process (over-treatment/dilution) compared with the single-stage process.
- As experiments have shown, a magnesium yield of 100 %
can be obtained given initial sulphur contents of more than 0.08 %, and - A mere 0.3 to 0.8 Kg magnesium is required per tonne of melt, which leads to a small dust generation.
Claims (18)
1. Process for the treatment of an iron melt with a solid pure metal of the alkaline and alkaline-earth type, involving the use of at least one refractory hollow body made of a material capable of being destroyed by said iron melt and containing said pure metal, process comprising: providing said hollow body with at least two apertures located at different levels and bringing said iron melt entirely to cover said hollow body to cause said pure metal to be melted and/or vaporized by the heat of said melt flowing into said hollow body, said hollow body being thereby destroyed by said melt.
2. A process as claimed in claim 1 t further involving the use of a treatment receptacle and comprising: placing said hollow body in said receptacle and pouring said iron melt com-pletely to cover said hollow body whereby said melt is treated by said pure metal contained in said hollow body.
3. A process as claimed in claim 2, comprising pouring said melt into said receptacle to a first level lower than the maximum level available in said receptacle whereby to overtreat said melt and subsequently diluting said melt by pouring additional melt substantially up to said maximum level to obtain a final melt of predetermined composition.
4. A process as claimed in claims 1, 2 or 3, wherein said hollow body is closed on all sides.
5. A process as claimed in claims 1, 2 or 3, wherein said hollow body is closed on all sides and said apertures are provided therethrough shortly before use the lower one of said apertures serving as inlet for said iron melt and the upper one of said apertures serving as outlet for vapors of said pure metal and for said melt.
6. A process as claimed in claims 1, 2 or 3, wherein said pure Metal is magnesium, said process being that of desulphurizing said iron melt.
7. A process as claimed in claims 1, 2 or 3, wherein the volume ratio of pure metal to hollow body amounts to at least 0.2 and preferably 0.8.
8. A process as claimed in claims 1, 2 or 3, com-prising holding said hollow body adjacent the bottom of said receptacle and in an offset position with respect to the vertical central axis of the said receptacle.
9. A device for the treatment of an iron melt, device comprising: at least one refractory hollow body made of a material capable of being destroyed by said iron melt when the latter is poured thereover; pure solid metal, of the alkaline and alkaline-earth type, in said hollow body; wherein said hollow body is formed with at least two apertures located at different levels thereof and reinforcing means in said hollow body.
10. A device as claimed in claim 9, wherein said reinforcing means is a wire mesh.
11. A device as claimed in claim 9, wherein said reinforcing means are fibres.
12. A device as claimed in claim 9, further com-prising a treatment receptacle in which said hollow body is disposed, said iron melt being poured into said receptacle com-pletely to cover said hollow body.
13. A device as claimed in claim 12, wherein said receptacle is a foundry ladle.
14. A device as claimed in claim 12, further com-prising holding means projecting into said receptacle to retain said hollow body in position therein.
15. A device as claimed in claim 14, further com-prising a second hollow body identical to said first mentioned hollow body and containing solid pure metal, and means securing said hollow bodies together.
16. A device as claimed in claim 15, wherein said means hold said bodies one beneath the other.
17. A device as claimed in claim 15, wherein said means hold said bodies one next to the other.
18. A device as claimed in claim 14, wherein said holding means comprises a vertical holding member having the lower end thereof secured to said hollow body; a horizontal cross beam having one end secured to the upper end of said holding member, and a jack having a rod movable vertically and connected to the other end of said cross beam for moving the latter, the holding member and the hollow body connected thereto, vertically.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH13278A CH638242A5 (en) | 1978-01-06 | 1978-01-06 | METHOD FOR DESULFURING LARGE QUANTITIES OF MELTING IRON, STEEL OR CAST IRON. |
| CH132/78-0 | 1978-01-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1119413A true CA1119413A (en) | 1982-03-09 |
Family
ID=4179976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000319252A Expired CA1119413A (en) | 1978-01-06 | 1979-01-08 | Process and a device for the treatment of an iron melt |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0003037A1 (en) |
| CA (1) | CA1119413A (en) |
| CH (1) | CH638242A5 (en) |
| WO (1) | WO1979000481A1 (en) |
| ZA (1) | ZA7949B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326146A (en) * | 2017-07-08 | 2017-11-07 | 淄博信晟机电技术有限公司 | The method that a small amount of low-density volatile metal is introduced into small-sized molten steel stove |
| CN107419058A (en) * | 2017-08-18 | 2017-12-01 | 淄博信晟机电技术有限公司 | The method that a small amount of low-density volatile metal is added in molten steel |
| CN107460275A (en) * | 2017-08-18 | 2017-12-12 | 淄博信晟机电技术有限公司 | The method that a small amount of low-density volatile metal is added in molten steel |
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| DE3021707A1 (en) * | 1980-06-10 | 1981-12-17 | Klöckner-Humboldt-Deutz AG, 5000 Köln | DEVICE FOR IMPORTING HIGHLY REACTIVE ADDITIVES INTO A METAL MELT |
| FR2493873B1 (en) * | 1980-11-07 | 1986-03-28 | Dunn Jr Edward | PROCESS FOR CLEANING STEEL IN CAST POCKET |
| CH656399A5 (en) * | 1981-05-08 | 1986-06-30 | Fischer Ag Georg | DIVE EVAPORATION CHAMBER. |
| CS265400B1 (en) * | 1987-09-24 | 1989-10-13 | Jaroslav Ing Csc Polak | Process for adding evaporable and meltable additives in melt ferrous alloys and device for making this process |
| US5871687A (en) * | 1997-08-04 | 1999-02-16 | Insul Company, Inc. | Consumable recharging box |
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| US1869925A (en) * | 1930-09-24 | 1932-08-02 | Hugh C Sicard | Article for introducing materials in a metallurgical bath |
| DE1021395B (en) * | 1952-06-17 | 1957-12-27 | Metallgesellschaft Ag | Process for the production of spheroidal graphite cast iron |
| CH331292A (en) * | 1952-10-27 | 1958-07-15 | Mond Nickel Co Ltd | Process for the production of cast iron |
| GB874181A (en) * | 1958-10-28 | 1961-08-02 | Mannesmann Ag | Method and apparatus for the addition of deoxidising and alloying elements to molten metal baths |
| DE1939246A1 (en) * | 1969-08-01 | 1971-02-11 | Koerver & Nehring Gmbh Maschin | Reaction vessel for the prep of spheroidal - cast iron |
| GB1404011A (en) * | 1972-06-21 | 1975-08-28 | Foseco Int | Apparatus for introducing volatile materials into metal melts |
| US3942775A (en) * | 1973-04-02 | 1976-03-09 | Labate Michael D | Submerged desulphurization device and method |
| US3934862A (en) * | 1973-04-12 | 1976-01-27 | Labate Michael D | Device for supplying a treating agent to molten metal in a ladle |
| DE2533246C2 (en) * | 1975-07-25 | 1983-01-13 | Metallgesellschaft Ag, 6000 Frankfurt | Process for the production of spheroidal graphite cast iron |
| US4060407A (en) * | 1975-08-25 | 1977-11-29 | Reactive Metals & Alloys Corporation | Methods and apparatus for adding mischmetal to molten steel |
| SE7611368L (en) * | 1975-10-15 | 1977-04-16 | Tarek El Gammal | CARRIER BODY FOR INFORMATION OF REACTIVITY IN METAL MELTOR |
| DE2558072C3 (en) * | 1975-12-22 | 1978-09-21 | Micheal Donald Ellwood City Pa. Labate (V.St.A.) | Method and device for introducing desulphurizing or alloying additives below the metal bath level |
| CA1096179A (en) * | 1977-01-18 | 1981-02-24 | Kirk D. Miller | Molten metal treatment |
| DD128912A5 (en) * | 1977-03-23 | 1977-12-14 | Foseco Trading Ag | TRAKERKOERPER FOR SUPPLEMENTS TO METAL MELTS |
-
1978
- 1978-01-06 CH CH13278A patent/CH638242A5/en not_active IP Right Cessation
- 1978-12-21 EP EP78101809A patent/EP0003037A1/en not_active Ceased
- 1978-12-27 WO PCT/CH1978/000056 patent/WO1979000481A1/en unknown
-
1979
- 1979-01-05 ZA ZA7949A patent/ZA7949B/en unknown
- 1979-01-08 CA CA000319252A patent/CA1119413A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326146A (en) * | 2017-07-08 | 2017-11-07 | 淄博信晟机电技术有限公司 | The method that a small amount of low-density volatile metal is introduced into small-sized molten steel stove |
| CN107326146B (en) * | 2017-07-08 | 2019-05-17 | 上海艾诺特殊钢铸造有限公司 | The method of a small amount of low-density volatile metal is introduced into small-sized molten steel furnace |
| CN107419058A (en) * | 2017-08-18 | 2017-12-01 | 淄博信晟机电技术有限公司 | The method that a small amount of low-density volatile metal is added in molten steel |
| CN107460275A (en) * | 2017-08-18 | 2017-12-12 | 淄博信晟机电技术有限公司 | The method that a small amount of low-density volatile metal is added in molten steel |
| CN107460275B (en) * | 2017-08-18 | 2019-05-03 | 启东市聚旺铸造有限公司 | The method of a small amount of low-density volatile metal is added in molten steel |
| CN107419058B (en) * | 2017-08-18 | 2019-06-07 | 陕西中钒昌盛新材料科技有限公司 | The method of a small amount of low-density volatile metal is added in molten steel |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1979000481A1 (en) | 1979-07-26 |
| CH638242A5 (en) | 1983-09-15 |
| EP0003037A1 (en) | 1979-07-25 |
| ZA7949B (en) | 1980-01-30 |
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