CN111235418A - Method for producing aluminum alloy flux by recycling byproducts and waste heat in titanium sponge production - Google Patents
Method for producing aluminum alloy flux by recycling byproducts and waste heat in titanium sponge production Download PDFInfo
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- CN111235418A CN111235418A CN202010265328.1A CN202010265328A CN111235418A CN 111235418 A CN111235418 A CN 111235418A CN 202010265328 A CN202010265328 A CN 202010265328A CN 111235418 A CN111235418 A CN 111235418A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/06—Making non-ferrous alloys with the use of special agents for refining or deoxidising
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/02—Making non-ferrous alloys by melting
- C22C1/026—Alloys based on aluminium
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Abstract
The invention discloses a method for producing an aluminum alloy flux by recycling byproducts and waste heat in titanium sponge production, which is to melt MgCl with the temperature of 800-1000 ℃ of the byproducts in the titanium sponge production2Transferring the solution into a mixing furnace, and then uniformly adding halogen salt with the temperature of 600-650 ℃ into MgCl by a multi-space movable preheating bed2Stirring the melt for 20-30 min to obtain a material a; and uniformly distributing the material a on a movable cooling bed to form a 3-5 mm thin liquid layer, cooling and solidifying by reverse drying air to obtain a flux layer b, and crushing and sieving the flux layer b to obtain the target aluminum alloy flux. The invention makes full use of the MgCl byproduct generated in the production of the titanium sponge2The added value of the product is improved; make full use of MgCl2The waste heat in the process improves the energy utilization efficiency and reduces the production cost; the original gas recovery system for producing the titanium sponge is fully utilized, and the equipment investment is saved.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to a method for producing an aluminum alloy flux by recycling byproducts and waste heat in titanium sponge production.
Background
Aluminum and aluminum alloys have been widely used in the fields of aviation, aerospace, construction, automotive, rail transit, marine, machine manufacturing, electrical, electronics, instrumentation, chemical, architectural decoration, packaging, sporting goods, and the like. The aluminum and the alloy thereof show the characteristics of easy oxidation and gas absorption in the smelting and casting processes, so that gas and impurities are easily formed in the aluminum liquid, a series of defects of air holes, shrinkage cavities, shrinkage porosity, cracks, insufficient casting, leakage and the like of a casting are caused, the strength, plasticity, fatigue resistance, corrosion resistance and the like of the material are greatly reduced, the casting is even scrapped, and the application of the aluminum alloy is greatly limited. Therefore, smelting is widely used in the smelting of aluminum and alloys to remove impurities and partial gas in molten aluminum, and the covering effect of the flux is utilized to reduce the oxidation and air suction of the aluminum alloy in the smelting and casting processes, thereby improving the purity of the aluminum alloy.
Currently as KCl-MgCl2The flux for smelting the sodium-free aluminum alloy serving as the matrix is generally applied to high-magnesium aluminum alloy with the magnesium content higher than 2% and 6 xxx series and 7 xxx series alloy with strict requirement on the sodium content. Most aluminum alloy flux manufacturers in China generally adopt a drying mixing method for production, and high-end fluxes imported from abroad adopt a fusion method for production, and are widely used for production of high-quality aluminum alloys.
TiCl in titanium sponge production process4After being reduced into Ti by Mg, MgCl is melted at high temperature of 800-1000 DEG C2The by-products are sold at a lower price after being cooled and solidified. MgCl2The value of the heat exchanger and the high-temperature waste heat are not fully utilized, so that the resources and the energy are greatly wasted.
Disclosure of Invention
The invention aims to provide a method for producing an aluminum alloy flux by recycling byproducts and waste heat in the production of titanium sponge.
The invention aims to realize the purpose that the molten MgCl with the temperature of 800-1000 ℃ is a byproduct in the production of the titanium sponge2Transferring the solution into a mixing furnace, and then uniformly adding halogen salt with the temperature of 600-650 ℃ into MgCl by a multi-space movable preheating bed2Stirring the melt for 20-30 min to obtain a material a; and uniformly distributing the material a on a movable cooling bed to form a 3-5 mm thin liquid layer, cooling and solidifying by reverse drying air to obtain a flux layer b, and crushing and sieving the flux layer b to obtain the target aluminum alloy flux.
The method for producing the aluminum alloy flux by recycling the byproducts and the waste heat in the production of the titanium sponge specifically comprises the following operations:
[1]the flux component: KCl mass fraction of 20-60 percent and MgCl220-60% of mass fraction, KCl and MgCl2The sum is 100%. The flux components are not limited to KCl and MgCl2And also can comprise one or more other components.
[2]Melting MgCl at 800-1000 DEG C2Weighing the solution, transferring the solution into a proportioning mixing furnace, and uniformly and slowly adding KCl powder with the temperature of 600-650 ℃ into MgCl through a porous movable preheating bed2And (4) in the melt, stirring for 20-30 min after the required proportion is achieved. Opening of flow control mechanism of proportioning mixing furnace, KCl-MgCl2The melt is evenly distributed on the movable cooling bed to form a 3-5 mm thin liquid layer, the melt liquid layer is cooled by reverse dry air along with the forward movement of the cooling bed, the melt liquid layer is gradually solidified into a 1-3 mm flux layer from a liquid state, and the flux layer is crushed to required granularity by a crusher and packaged.
[3]Molten MgCl2Is derived from the side product in the production of titanium spongeThe temperature of the product is 800-1000 ℃. Volatile gas in the flux production process is recovered and treated by a recovery system of the original titanium sponge production line.
Compared with the prior art, the invention has the following obvious advantages: (1) by-product MgCl produced by titanium sponge is fully utilized2And the added value of the product is improved. (2) Make full use of MgCl2The waste heat in the process improves the energy utilization efficiency and reduces the production cost. (3) The original gas recovery system for producing the titanium sponge is fully utilized, and the equipment investment is saved.
Therefore, the invention has obvious cost advantage compared with the traditional technology.
Drawings
FIG. 1 is a schematic diagram of the main apparatus and material flow of the present invention;
in the figure, 1-proportioning mixing furnace; 2-a flow control mechanism; 3-a mobile cooling bed; 4-a crusher; 5-drying wind; 6-porous movable preheating bed; 7-insulating layer; 8-melting a flux; 9-KCl powder; 10-MgCl2And (4) melting the melt.
Detailed Description
The present invention is further illustrated by the following examples, which are not intended to be limiting in any way, and any modifications or alterations based on the teachings of the present invention are intended to fall within the scope of the present invention.
The method for producing the aluminum alloy flux by recycling the byproducts and the waste heat in the production of the titanium sponge comprises the step of melting MgCl with the temperature of 800-1000 ℃ by-products in the production of the titanium sponge2Transferring the solution into a mixing furnace, and then uniformly adding halogen salt with the temperature of 600-650 ℃ into MgCl by a multi-space movable preheating bed2Stirring the melt for 20-30 min to obtain a material a; and uniformly distributing the material a on a movable cooling bed to form a 3-5 mm thin liquid layer, cooling and solidifying by reverse drying air to obtain a flux layer b, and crushing and sieving the flux layer b to obtain the target aluminum alloy flux.
The aluminum alloy flux consists of MgCl2And halogen salts, MgCl220-60% of (A), the balance being halogen salt and MgCl2And the sum of the halogen salts is 100%.
The halogen salt isKCl and/or CaCl2。
The thickness of the flux layer b is 1-3 mm.
The crushing and sieving is to crush and sieve through a sieve with 10-80 meshes.
The invention is further illustrated by the following specific examples:
example 1
[1]Flux proportioning: KCl mass fraction of 20-60 percent and MgCl220-60% of mass fraction, KCl and MgCl2=100%。
[2]Melting MgCl at 800-850 deg.C2Weighing the solution, transferring the solution into a proportioning mixing furnace, and uniformly and slowly adding KCl powder with the temperature of 600-650 ℃ into MgCl through a porous movable preheating bed2And (4) in the melt, stirring for 20-25 min after the required proportion is achieved. Opening of flow control mechanism of proportioning mixing furnace, KCl-MgCl2The melt liquid is uniformly distributed on the movable cooling bed to form a 3-5 mm thin liquid layer, the melt liquid layer is cooled by reverse drying air along with the forward movement of the cooling bed, the melt liquid layer is gradually solidified into a 1-3 mm flux layer from a liquid state, the flux layer is crushed into a particle size of less than or equal to 80 meshes by a crusher, and the flux layer is packaged.
Example 2
[1]Flux proportioning: KCl mass fraction of 20-60 percent and MgCl220-60% of CaCl2= 5-20% mass fraction KCl + MgCl2+CaCl2=100%。
[2]Melting MgCl at 850-900 DEG C2Weighing the solution, transferring the solution into a proportioning mixing furnace, and then carrying out KCl and CaCl heating at the temperature of 620-650 ℃ by a porous movable preheating bed2The powder was added uniformly and slowly to MgCl2And (4) in the melt, stirring for 20-25 min after the required proportion is achieved. Opening of flow control mechanism of proportioning mixing furnace, KCl-MgCl2- CaCl2The melt is evenly distributed on the movable cooling bed to form a 3-5 mm thin liquid layer, the melt liquid layer is cooled by reverse dry air along with the forward movement of the cooling bed, the melt liquid layer is gradually solidified into a 1-3 mm flux layer by liquid state, and the melt liquid layer is crushed into 0.8-3.0 mm particles by a crusher and packaged.
Claims (5)
1. A method for producing an aluminum alloy flux by recycling byproducts and waste heat in the production of titanium sponge,the method is characterized in that molten MgCl with the temperature of 800-1000 ℃ is a byproduct in the production of the titanium sponge2Transferring the solution into a mixing furnace, and then uniformly adding halogen salt with the temperature of 600-650 ℃ into MgCl by a multi-space movable preheating bed2Stirring the melt for 20-30 min to obtain a material a; and uniformly distributing the material a on a movable cooling bed to form a 3-5 mm thin liquid layer, cooling and solidifying by reverse drying air to obtain a flux layer b, and crushing and sieving the flux layer b to obtain the target aluminum alloy flux.
2. The method for producing the aluminum alloy flux by recycling the byproducts and the waste heat in the production of the titanium sponge according to claim 1, characterized in that the aluminum alloy flux consists of MgCl2And halogen salts, MgCl220-60% of (A), the balance being halogen salt and MgCl2And the sum of the halogen salts is 100%.
3. The method for producing the aluminum alloy flux by recycling the byproducts and the waste heat in the production of the titanium sponge according to claim 1 or 2, characterized in that the halide salt is KCl and/or CaCl2。
4. The method for producing the aluminum alloy flux by recycling the byproducts and the waste heat in the production of the titanium sponge according to claim 1, wherein the thickness of the flux layer b is 1-3 mm.
5. The method for producing the aluminum alloy flux by recycling the byproducts and the waste heat in the production of the titanium sponge according to claim 1, wherein the crushing and sieving is to crush and sieve the aluminum alloy flux by a sieve of 10-80 meshes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010265328.1A CN111235418A (en) | 2020-04-07 | 2020-04-07 | Method for producing aluminum alloy flux by recycling byproducts and waste heat in titanium sponge production |
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| CN202010265328.1A CN111235418A (en) | 2020-04-07 | 2020-04-07 | Method for producing aluminum alloy flux by recycling byproducts and waste heat in titanium sponge production |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS644574B2 (en) * | 1984-11-19 | 1989-01-26 | Kobe Steel Ltd | |
| RU2203337C1 (en) * | 2001-10-31 | 2003-04-27 | ООО "Промтрейдинтелл" | Flux for aluminum and its alloys |
| CN105177335A (en) * | 2015-09-15 | 2015-12-23 | 沈阳航空航天大学 | Alloy element additive used for aluminum alloy production and preparation method thereof |
| CN106498216A (en) * | 2016-12-05 | 2017-03-15 | 沈阳航空航天大学 | A kind of preparation method of villaumite fusion refining agent |
-
2020
- 2020-04-07 CN CN202010265328.1A patent/CN111235418A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS644574B2 (en) * | 1984-11-19 | 1989-01-26 | Kobe Steel Ltd | |
| RU2203337C1 (en) * | 2001-10-31 | 2003-04-27 | ООО "Промтрейдинтелл" | Flux for aluminum and its alloys |
| CN105177335A (en) * | 2015-09-15 | 2015-12-23 | 沈阳航空航天大学 | Alloy element additive used for aluminum alloy production and preparation method thereof |
| CN106498216A (en) * | 2016-12-05 | 2017-03-15 | 沈阳航空航天大学 | A kind of preparation method of villaumite fusion refining agent |
Non-Patent Citations (2)
| Title |
|---|
| 倪红军: "新型铝合金熔剂的研究", 《特种铸造及有色合金》 * |
| 向凌霄: "《原铝及其合金的熔炼与铸造》", 31 October 2005, 冶金工业出版社 * |
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