Composite manganese additive with refining and deslagging functions

Abstract

The invention discloses a composite manganese additive with refining and deslagging functions. The method has the technical advantages that during aluminum alloy casting operation, the operation process is simplified, energy is saved, metal element components are improved, and meanwhile, refining agent components contained in the product can also play the role of refining, degassing, deslagging and deterioration; the method conforms to the industrial technology development direction of high aluminum alloy casting efficiency, low cost and stable aluminum alloy product quality when industrial products are applied to the aluminum alloy, and overcomes the technical defects that in existing aluminum alloy smelting, a manganese additive and a refining agent for the aluminum alloy are added separately, the operation process is tedious, and energy consumption is large.

Description

Technical Field

[0001] The present invention relates to the technical field of composite manganese additives, and particularly to a composite manganese additive with the functions of refining and slag removal. Background Art

[0002] Aluminum alloys are widely used in machinery manufacturing, transportation machinery, power machinery, aerospace and other fields. Aluminum alloy production involves adding metal additives such as iron, manganese, chromium, titanium, etc. to pure aluminum for melting, and then adding fluxes such as refining agents and slagging agents for refining, slag removal, and rolling. The quality stability of aluminum alloy products depends on the stability of the contents of elements such as iron, manganese, chromium, and titanium in the metal additives incorporated therein and the stability of the later-stage refining, degassing, slag removal, and metallographic structure.

[0003] Currently, metal additives for aluminum alloys generally use metal particles such as manganese, iron, or chromium as the main element components, and add flux components such as fluoride salt powder or aluminum powder. After mixing, they are pressed into cylindrical blocks. When the existing metal additives for aluminum alloys are used, generally about 1.5% of the dosage is added to the pure aluminum liquid, which can only increase the contents of metal elements such as manganese, iron, or chromium in the aluminum alloy. To remove hydrogen and non-metallic impurities in the melted aluminum alloy and improve the metallographic structure of the aluminum alloy, since the density of the refining agent is smaller than that of the aluminum liquid in the later stage of melting, nitrogen or argon is also blown into the bottom of the aluminum liquid with 0.2% of flux particles such as the refining agent for degassing, slag removal, and modification to further improve the quality of the aluminum alloy. The problems are that melting is carried out first and then refining and modification, the process flow is long, the operation time for each step is long, the production efficiency is low, and the aluminum liquid continuously cools and heats up during the operation process, resulting in large energy consumption. Summary of the Invention

[0004] The purpose of the present invention is to provide a composite manganese additive with the functions of refining and slag removal to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A composite manganese additive with the functions of refining and slag removal, specifically including the following production steps: S1. Crush electrolytic manganese metal into manganese particles with a particle size of -100 mesh under nitrogen protection; S2. Screen and select flux fluoride salt or aluminum powder particles with a particle size specification of -100 mesh; S3. Mix the components of the refining agent, including 40% sodium chloride, 12% potassium chloride, 4% sodium fluorosilicate, 10% sodium fluoride, 13% barium sulfate, 20% magnesium carbonate, 0.8% sodium nitrate, and 0.2% graphite powder, etc. in proportion, dry them at a temperature of 200 °C, and then crush them into refining agent particles with a particle size of -100 mesh; S4. Mix 80% of -100 mesh manganese particles, 9.6% of -100 mesh fluoride salt particles, 10% of -100 mesh aluminum powder, and 0.4% of zinc stearate proportionally to form manganese additive particles with a content of 80%. S5. Pour 200 g of manganese additive particles into the mold of a press molding machine for pre-pressing, with a pressing pressure of 5 MPa. S6. Then continue to pour 50 g of refining agent particles for pre-pressing, with a pressing pressure of 5 MP. S7. Then continue to pour 200 g of the manganese additive particles in S5 for pre-pressing, with a pressing pressure of 5 MP. S8. Then continue to pour 50 g of the refining agent particles in S3 for pre-pressing, with a pressing pressure of 5 MP. S9. Then continue to pour 200 g of the manganese additive particles in S4 for pre-pressing, with a pressing pressure of 5 MP. S10. Then continue to pour 50 g of the refining agent particles in S3 for pre-pressing, with a pressing pressure of 5 MP. S11. Finally, add another 200 g of the manganese additive particles in S4 and pour them into the mold of the press molding machine for pressing, with a pressing pressure of 13 - 15 MPa, to form a cylindrical block-shaped composite manganese additive for aluminum alloy with a density of 3.7 - 4.0 g / cm3 and a block weight of 1200 g.

[0006] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention has the technical advantages of simplifying the operation process and saving energy during the aluminum alloy melting and casting operation. While increasing the metal element content, the refining agent component contained in the product can also play a role in refining, degassing, slag removal, and modification. It conforms to the industry technical development direction of high efficiency, low cost, and stable quality of aluminum alloy products in the application of industry products to aluminum alloy melting and casting, and solves the technical difficulties and disadvantages of the existing aluminum alloy melting, such as separately adding manganese additives and refining agents for aluminum alloy, with cumbersome operation processes and large energy consumption. Specific Embodiments

[0007] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0008] The present invention provides a technical solution: a composite manganese additive with both refining and slag removal functions. 1. Crush and screen electrolytic manganese metal into -100 mesh manganese particles under nitrogen protection.

[0009] 2. Crush or screen the flux fluoride salt or aluminum powder and select -100 mesh flux fluoride salt or aluminum powder particles.

[0010] 3. Mix 40% sodium chloride, 12% potassium chloride, 4% sodium fluorosilicate, 10% sodium fluoride, 13% barium sulfate, 20% magnesium carbonate, 0.8% sodium nitrate, 0.2% graphite powder, etc. in the refining agent components in proportion, then dry them at 200 degrees Celsius, and then crush them into refining agent particles with a mesh size of -100.

[0011] 4. Mix 80% of the above-mentioned -100 mesh manganese particles, 9.6% of the -100 mesh fluoride salt particles, 10% of the -100 mesh aluminum powder, and 0.4% of zinc stearate in proportion to form manganese additive particles with a content of 80%.

[0012] 5. Pour 200 grams of the manganese additive particles in Step 4 into the mold of a compression molding machine for pre-pressing, with a pressing pressure of 5 MPa; then continue to pour 50 grams of the refining agent particles in Step 3 above for pre-pressing, with a pressing pressure of 5 MPa; then continue to pour 200 grams of the manganese additive particles in Step 4 above for pre-pressing, with the same pressing pressure; then continue to pour 50 grams of the refining agent particles in Step 3 above for pre-pressing, with the same pressing pressure; then continue to pour 200 grams of the manganese additive particles in Step 4 above for pre-pressing, with the same pressing pressure; then continue to pour 50 grams of the refining agent particles in Step 3 above for pre-pressing, with the same pressing pressure; finally, add 200 grams of the manganese additive particles in Step 4 above and pour them into the mold of the compression molding machine for pressing, with a pressing pressure of 13 - 15 MPa, to press into a cylindrical block-shaped composite manganese additive for aluminum alloy with a density of 3.7 - 4.0 g / cm3 and a block weight of 1200 grams.

[0013] 6. The addition amount ratio of each layer of manganese additive particles and refining agent particles in Step 5 can be adjusted according to customer requirements.

[0014] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite manganese additive with both refining and slag removal functions, characterized in that, It includes the following production steps: S1. Crush electrolytic manganese metal into manganese particles with a particle size of -100 mesh under nitrogen protection and screen them; S2. Select flux fluorinated salt or aluminum powder particles with a particle size specification of -100 mesh for screening; S3. Mix 40% sodium chloride, 12% potassium chloride, 4% sodium fluorosilicate, 10% sodium fluoride, 13% barium sulfate, 20% magnesium carbonate, 0.8% sodium nitrate, 0.2% graphite powder, etc. in the refining agent components in proportion, dry them at a temperature of 200 °C, and then crush them into refining agent particles with a particle size of -100 mesh; S4. Mix 80% of -100 mesh manganese particles, 9.6% of -100 mesh fluorinated salt particles, 10% of -100 mesh aluminum powder, and 0.4% of zinc stearate in proportion to form manganese additive particles with a content of 80%; S5. Pour 200 g of manganese additive particles into the mold of a press molding machine for pre-pressing, with a pressing pressure of 5 MPa; S6. Then continue to pour 50 g of refining agent particles for pre-pressing, with a pressing pressure of 5 MP; S7. Then continue to pour 200 g of manganese additive particles in S5 for pre-pressing, with a pressing pressure of 5 MP; S8. Then continue to pour 50 g of refining agent particles in S3 for pre-pressing, with a pressing pressure of 5 MP; S9. Then continue to pour 200 g of manganese additive particles in S4 for pre-pressing, with a pressing pressure of 5 MP; S10. Then continue to pour 50 g of refining agent particles in S3 for pre-pressing, with a pressing pressure of 5 MP; S11. Finally, add another 200 g of manganese additive particles in S4, pour them into the mold of a press molding machine for pressing, with a pressing pressure of 13 - 15 MPa, and press them into a cylindrical block-shaped composite manganese additive for aluminum alloy with a density of 3.7 - 4.0 g / cm3 and a block weight of 1200 g.