Patent EP0249897A1 successfully refreshed from Google Patents.
EP0249897A1
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EP
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Process for the degassing, refining or filtering treatment of liquid metals or alloys and related apparatus
Assignee: Oet-Metalconsult Srl
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Filing: 1987-06-11
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Granted: —
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Expires: 2007-06-11
Abstract
Abstract A process for the degassing, refining or filtering treatment of liquid metals or alloys wherein the metallic liquid is treated with a solid treatment agent. The process comprises the steps consisting of providing the treatment agent in the form of solid granules (10) in a closed container (1) having two counterposed walls in the shape of perforated diaphragms (2a, 2b), with holes having such dimensions as to retain said granules, and having further lateral walls; interposing said container in the pouring channel, at the base thereof; and passing said metallic liquid through said container through said diaphragms to make contact with said treatment agent in said container. An apparatus for performing the process is also described.
Inventors
- 👤 Mario Dominique Gorgerino
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 14:11
CPC Classifications
C; C21; C21C; C21C1/00; C21C1/10; B; B22; B22C; B22C9/00; B22C9/08; B22C9/086; B22D; B22D1/00; B22D1/007
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
135 words
Process for the degassing, refining or filtering treatment of metals and alloys, wherein, during the casting in a die of a said metal or alloy in the liquid state, the same is treated with a solid treatment agent, characterized in that it comprises the steps of providing the treatment agent in the form of solid granules (10) in a closed container (1) having two counterposed walls in the shape of perforated diaphragms (2a, 2b), with holes having such dimensions as to retain said granules, and having further lateral walls; interposing said container (1) in the path of the metallic liquid in the pouring channel (4) wherein it is cast; and passing said metallic liquid through said container (1) through said diaphragms (2a, 2b) to make contact with said treatment agent (10) in said container (1).
Claim 2
Dependent Claim
135 words
Process for the degassing, refining or filtering treatment of metals and alloys, wherein, during the casting in a die of a said metal or alloy in the liquid state, the same is treated with a solid treatment agent, characterized in that it comprises the steps of providing the treatment agent in the form of solid granules (10) in a closed container (1) having two counterposed walls in the shape of perforated diaphragms (2a, 2b), with holes having such dimensions as to retain said granules, and having further lateral walls; interposing said container (1) in the path of the metallic liquid in the pouring channel (4) wherein it is cast; and passing said metallic liquid through said container (1) through said diaphragms (2a, 2b) to make contact with said treatment agent (10) in said container (1).
Claim 3
Dependent Claim
126 words
Process for the degassing or inoculation of cast iron or steel by inoculation in said metals in the liquid state of a silicon alloy adapted to react with the gases contained in said metallic liquids, characterized in that it comprises the steps consisting of providing said silicon alloy in the form of solid granules (10) in a closed container (1) having two counterposed walls in the shape of perforated diaphragms (2a, 2b), with holes having such dimensions as to retain said granules, and having further lateral walls; interposing said container in the path of said metallic liquids in the pouring channel (4) wherein they are cast; and passing said metallic liquids through said container through said diaphragms to make contact with said silicon alloy contained therein.
Claim 4
Dependent Claim
126 words
Process for the degassing or inoculation of cast iron or steel by inoculation in said metals in the liquid state of a silicon alloy adapted to react with the gases contained in said metallic liquids, characterized in that it comprises the steps consisting of providing said silicon alloy in the form of solid granules (10) in a closed container (1) having two counterposed walls in the shape of perforated diaphragms (2a, 2b), with holes having such dimensions as to retain said granules, and having further lateral walls; interposing said container in the path of said metallic liquids in the pouring channel (4) wherein they are cast; and passing said metallic liquids through said container through said diaphragms to make contact with said silicon alloy contained therein.
Claim 5
Dependent Claim
115 words
Process for the degassing or refining of non-ferrous alloys by means of their treatment in the liquid state with salts adapted for degassing or refining, characterized in that it comprises the steps consisting of providing said salts in the form of solid granules (10) in a closed container (1) having two counterposed walls in the shape of perforated diaphragms (2a, 2b), with holes having such dimensions as to retain said granules, and having further lateral walls; interposing said container in the path of the metallic liquid in the pouring channel (4) wherein it is cast; and passing said metallic liquid through said container through said diaphragms to make contact with said salts in said container.
Claim 6
Dependent Claim
115 words
Process for the degassing or refining of non-ferrous alloys by means of their treatment in the liquid state with salts adapted for degassing or refining, characterized in that it comprises the steps consisting of providing said salts in the form of solid granules (10) in a closed container (1) having two counterposed walls in the shape of perforated diaphragms (2a, 2b), with holes having such dimensions as to retain said granules, and having further lateral walls; interposing said container in the path of the metallic liquid in the pouring channel (4) wherein it is cast; and passing said metallic liquid through said container through said diaphragms to make contact with said salts in said container.
Claim 7
Dependent Claim
119 words
Process for the refining of pure metals or of their master alloys, wherein said metals in the liquid state are filtered through mineral filtering elements, characterized in that it comprises the steps consisting of providing the filtering elements in the form of solid granules (10) in a closed container (1) having two counterposed walls in the shape of perforated diaphragms (2a, 2b), with holes having such dimensions as to retain said granules, and having further lateral walls; interposing said container in the path of the metallic liquid in the pouring channel (4) wherein it is cast; and passing said metallic liquid through said container by means of said diaphragms to make contact with said filtering elements in said container.
Claim 8
Dependent Claim
119 words
Process for the refining of pure metals or of their master alloys, wherein said metals in the liquid state are filtered through mineral filtering elements, characterized in that it comprises the steps consisting of providing the filtering elements in the form of solid granules (10) in a closed container (1) having two counterposed walls in the shape of perforated diaphragms (2a, 2b), with holes having such dimensions as to retain said granules, and having further lateral walls; interposing said container in the path of the metallic liquid in the pouring channel (4) wherein it is cast; and passing said metallic liquid through said container by means of said diaphragms to make contact with said filtering elements in said container.
Claim 9
Dependent Claim
72 words
Process according to any one of the preceding claims, wherein said closed container is provided with a first said perforated diaphragm (2b), arranged upstream with respect to the direction of the flow of said metallic liquid, with a total cross section of the holes greater than the total cross section of the holes of said second diaphragm (2a) arranged downstream to create an overpressure of the metallic fluid inside said closed container.
Claim 10
Dependent Claim
47 words
Process according to any one of the preceding claims, wherein said closed container comprises, on at least one of said diaphragms, grooves (9) for the expulsion of the gases developed by said metallic liquid, arranged on a peripheral area of the diaphragm not affected by said flow.
Claim 11
Dependent Claim
23 words
Process according to claim 6, wherein said closed container furthermore comprises said lateral walls provided with vents for the release of said gases.
Claim 12
Dependent Claim
22 words
Process according to any one of the preceding claims, wherein at least the perforated diaphragms of said container are in refractory material.
Claim 13
Dependent Claim
123 words
Auxiliary device for apparatus for forming by casting of metals and alloys, said apparatus being intended for the treatment of said metals in the liquid state with a solid treatment agent, characterized in that it comprises a closed container (1) having two counterposed walls in the shape of perforated diaphragms (2a, 2b), and further lateral walls; said container being adapted to contain said treatment agent in the form of solid granules (10), the holes of the diaphragms being such as to allow the flow of the metals in the liquid state but not the release of said granules from said container, said auxiliary device being removably arrangeable in a said apparatus for forming by casting in said pouring channel (4) of said apparatus.
Claim 14
Dependent Claim
123 words
Auxiliary device for apparatus for forming by casting of metals and alloys, said apparatus being intended for the treatment of said metals in the liquid state with a solid treatment agent, characterized in that it comprises a closed container (1) having two counterposed walls in the shape of perforated diaphragms (2a, 2b), and further lateral walls; said container being adapted to contain said treatment agent in the form of solid granules (10), the holes of the diaphragms being such as to allow the flow of the metals in the liquid state but not the release of said granules from said container, said auxiliary device being removably arrangeable in a said apparatus for forming by casting in said pouring channel (4) of said apparatus.
Claim 15
Dependent Claim
51 words
Device according to claim 9, wherein the holes of the diaphragm (2b) arranged in use upstream with respect to the direction of flow of said metals in the liquid state have a total cross section which is greater than the cross section of the holes of the diaphragm (2a) arranged downstream.
Claim 16
Dependent Claim
45 words
Device according to claim 9, wherein at least one of said perforated diaphragms comprises grooves (9) for the release of gas arranged on a peripheral region of the diaphragm which in use is not affected by the flow of the metals in the liquid state.
Claim 17
Dependent Claim
15 words
Device according to claim 9, wherein at least said diaphragms are made of refractory material.
Claim 18
Dependent Claim
30 words
Device according to claim 9, wherein said closed container comprises a cylinder having the bases consisting of said perforated diaphragms in ceramic material and the lateral walls made of cardboard.
References Cited (Backward Citations)
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