GB827619A - Improvements in or relating to the treatment of molten metals - Google Patents
Improvements in or relating to the treatment of molten metalsInfo
- Publication number
- GB827619A GB827619A GB2908056A GB2908056A GB827619A GB 827619 A GB827619 A GB 827619A GB 2908056 A GB2908056 A GB 2908056A GB 2908056 A GB2908056 A GB 2908056A GB 827619 A GB827619 A GB 827619A
- Authority
- GB
- United Kingdom
- Prior art keywords
- molten metal
- metal
- gas
- sodium
- product
- 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
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/05—Refining by treating with gases, e.g. gas flushing also refining by means of a material generating gas in situ
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
A shaped solid, product for addition to molten metal to generate gas therein comprises a compacted intimate mixture of a solid particulate substance which, at the temperature of the molten metal, generates or is converted into a gas, and a solid particulate carrier material containing a compound that sinters on heating and remains as a coherent product after generation of the gas. The carrier material may be a mixture of refractory material of good heat-insulating properties and a sintering salt or it may contain two materials of different melting point, one of which has a lower melting point than the metal being treated and will react with the other to form a compound having a melting point above that of the molten metal, e.g. sodium or potassium borofluoride or a mixture thereof with sodium fluoride or borax with calcium fluoride. Alternatively the carrier material may contain a salt such as sodium silicofluoride which decomposes to give off a gas and to leave a high melting point residue. Materials to modify the grain of the metal, e.g. potassium borofluoride may also be included. The gas generating substance may be hexachlorethane. The product, in the form of a flat cylindrical tablet having a central aperture may be applied to the molten metal by threading the tablet on the end of a rod and plunging the rod into the molten metal or by locating the product within a cylindrical open coil at the end of a rod and plunging the rod into the molten metal. The product may be used to remove occluded or dissolved gases from molten metal, to remove metals from molten metal mixtures e.g. to remove magnesium from aluminium by means of chlorine or aluminium from copper alloys such as brass or bronze by means of oxygen or to add gases such as hydrogen to metals. The third Provisional Specification describes also the use of a solid body comprising a conditioning agent the body having a specific gravity greater than that of the metal being treated and being in the form of a compressed mixture of the agent and refractory or a refractory block impregnated or coated with the agent. The refractory block may have a weight e.g. of lead at its centre. The second Provisional Specification describes also the use of a porous container containing conditioning agent, the container having a detachable screw plug or being in two halves which can be screwed together. The container, which may be of perforated graphite, may include a block of heavy metal such as lead to make it self sinking. Alternatively the body may be so composed and be subjected to such a degree of compression that, on evolving gas, it becomes lighter than the molten metal and floats to the surface. A reactive metal such as sodium may be placed in a sealed container which will melt at the temperature of the metal to be treated, the container being placed in a porous refractory housing. The sodium may be associated with other conditioning agents. The first Provisional Specification describes also the use of a conditioning agent mixed with a materials which is destroyed or merges in or alloys with the molten metal treated. For example the said material, in the treatment of molten aluminium, may be aluminium or an alloy thereof with manganese or copper. Specifications 624,479 and 794,604 are referred to.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES0237683A ES237683A1 (en) | 1956-09-24 | 1956-09-20 | Procedure for the conditioning of casted metals (Machine-translation by Google Translate, not legally binding) |
GB2908056A GB827619A (en) | 1956-09-24 | 1956-09-24 | Improvements in or relating to the treatment of molten metals |
CH5037757A CH375147A (en) | 1956-09-24 | 1957-09-10 | Process for treating molten metal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2908056A GB827619A (en) | 1956-09-24 | 1956-09-24 | Improvements in or relating to the treatment of molten metals |
Publications (1)
Publication Number | Publication Date |
---|---|
GB827619A true GB827619A (en) | 1960-02-10 |
Family
ID=10285838
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2908056A Expired GB827619A (en) | 1956-09-24 | 1956-09-24 | Improvements in or relating to the treatment of molten metals |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB827619A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3224872A (en) * | 1961-11-16 | 1965-12-21 | Foseco Int | Bonding method of value in the treatment of metals |
DE3610512A1 (en) * | 1986-03-27 | 1987-10-01 | Riedelbauch & Stoffregen Gmbh | Process for optimising the reaction of hexachloroethane for the degassing of molten aluminium and of aluminium alloys and also the distribution of crystallisation nuclei in them |
-
1956
- 1956-09-24 GB GB2908056A patent/GB827619A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3224872A (en) * | 1961-11-16 | 1965-12-21 | Foseco Int | Bonding method of value in the treatment of metals |
DE3610512A1 (en) * | 1986-03-27 | 1987-10-01 | Riedelbauch & Stoffregen Gmbh | Process for optimising the reaction of hexachloroethane for the degassing of molten aluminium and of aluminium alloys and also the distribution of crystallisation nuclei in them |
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