Refining agent for smelting aluminum alloy and preparation method of refining agent

A refining agent, aluminum alloy technology, applied in the field of aluminum alloy processing, can solve the problems of high hydrogen content and non-metallic inclusion content, achieve good impurity removal effect, improve performance, and reduce metal burning loss.

Inactive Publication Date: 2018-03-16
广西平果铝合金精密铸件有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a refining agent for aluminum alloy smelting and its preparation method to solve the problems of high hydrogen content and non-metallic inclusion content in aluminum alloy, and to reduce the gas content and non-metallic inclusions in aluminum alloy melt. Targeting of Metal Inclusion Content to Improve Properties of Aluminum Alloy Materials

Method used

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  • Refining agent for smelting aluminum alloy and preparation method of refining agent
  • Refining agent for smelting aluminum alloy and preparation method of refining agent

Examples

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preparation example Construction

[0025] A method for preparing a refining agent for aluminum alloy smelting comprising the above raw materials, comprising the following steps:

[0026] S1: La 2 o 3 Dissolve in hydrochloric acid and dilute to 120-130g / L, heat the solution to 72-75°C, add 48% hydrofluoric acid, stir to obtain a precipitate, then wash, filter, and dry the precipitate until the water content is ≤2% , crushed to a particle size of ≤2mm, and dehydrated under the condition of a vacuum of 0.5-0.8MPa to obtain F 3 La powder;

[0027] S2: put Nd 2 o 3 Dissolve in hydrochloric acid and dilute to 120-130g / L, heat the solution to 72-75°C, add 48% hydrofluoric acid, stir to obtain a precipitate, then wash, filter, and dry the precipitate until the water content is ≤2% , Grinding to particle size ≤ 2mm, and dehydrating under the condition of vacuum degree of 0.5-0.8MPa to obtain FNd powder;

[0028] S3: KCl, NaCl, KNO 3 , MgS, CaS, A1F 3 , NaF, MgF 2 、Na 3 A1F 6 、Na 2 SiF 6 Put the powder into ...

Embodiment 1

[0031] A refining agent for aluminum alloy smelting, in parts by weight, comprising the following raw materials: 40 parts of KCl, 30 parts of NaCl, KNO 3 33 parts, 10 parts of MgS, 10 parts of CaS, A1F 3 7 parts, NaF8 parts, MgF 2 3 parts, Na 3 A1F 6 8 parts, Na 2 SiF 6 2 parts, FNd 0.5 parts, F 3 La 0.5 parts;

[0032] A method for preparing a refining agent for aluminum alloy smelting comprising the above raw materials, comprising the following steps:

[0033] S1: La 2 o 3 Dissolve in hydrochloric acid and dilute to 125g / L, heat the solution to 72°C, add 48% hydrofluoric acid, stir to obtain a precipitate, then wash, filter, dry the precipitate to a water content of ≤2%, and crush to particle size ≤2mm, dehydration under the condition of vacuum degree of 0.8MPa to get F 3 La powder;

[0034] S2: put Nd 2 o 3 Dissolve in hydrochloric acid and dilute to 125g / L, heat the solution to 72°C, add 48% hydrofluoric acid, stir to obtain a precipitate, then wash, filter...

Embodiment 2

[0038] A refining agent for aluminum alloy smelting, in parts by weight, comprising the following raw materials: 36 parts of KCl, 24 parts of NaCl, KNO 3 30 parts, MgS 15 parts, CaS 6 parts, A1F 3 6 parts, NaF 4 parts, MgF 2 8 parts, Na 3 A1F 6 4 parts, Na 2 SiF 6 7 parts, FNd 0.2 parts, F 3 La1.1 part;

[0039] A method for preparing a refining agent for aluminum alloy smelting comprising the above raw materials, comprising the following steps:

[0040] S1: La 2 o 3 Dissolve in hydrochloric acid and dilute to 120g / L, heat the solution to 75°C, add 48% hydrofluoric acid, stir to obtain a precipitate, then wash, filter, dry the precipitate to a water content of ≤2%, and crush to particle size ≤2mm, dehydration under the condition of vacuum degree of 0.6MPa to get F 3 La powder;

[0041] S2: put Nd 2 o 3 Dissolve in hydrochloric acid and dilute to 120g / L, heat the solution to 75°C, add 48% hydrofluoric acid, stir to obtain a precipitate, then wash, filter, dry ...

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Abstract

The invention discloses a refining agent for smelting an aluminum alloy and a preparation method of the refining agent and belongs to the technical field of aluminum alloy machining. The refining agent for smelting the aluminum alloy comprises, by weight, 30-40 parts of KCl, 20-30 parts of NaCl, 30-40 parts of KNO3, 10-15 parts of MgS, 5-10 parts of CaS, 6-11 parts of AlF3, 3-8 parts of NaF, 3-8 parts of MgF2, 4-10 parts of Na3AlF6, 2-7 parts of Na2SiF6, 0.2-0.6 part of FNd and 0.5-1.1 parts of F3La. The refining agent is the most reasonable medium combination obtained through repeated tests and elaborate screening; the slag removal effect is greater than 85.5%; the refining agent does not chemically act with any metal or furnace lining, so that the heat dissipation effect is controlled; and the metal loss probability is lowered.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloy processing, and in particular relates to a refining agent for aluminum alloy smelting and a preparation method thereof. Background technique [0002] China ranks third in the world's aluminum consumption rankings. Although China's aluminum production ranks second in the world, most of the aluminum used in China is imported, and it is the world's largest aluminum importer. The reason for this situation is that China's aluminum industry is still far behind advanced countries in terms of production process control, product quality control, and production scale. Most importantly, China's lack of capacity and a large gap in the supply of high-quality aluminum billets are the main problems. In the process of smelting and casting, aluminum and its alloys are easily oxidized and absorb gas. This characteristic makes gas and inclusions easy to form in molten aluminum, which in turn causes a series ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/06C22C1/02C22C21/00
CPCC22C1/06C22C1/026
Inventor 梁春才梁健梁祥友
Owner 广西平果铝合金精密铸件有限公司
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