Production Technology of High Density Al-Si Alloy Ingot

An aluminum-silicon alloy and production process technology, applied in the field of recycled aluminum production process, can solve the problems of high secondary oxidation rate, affecting the quality of finished products, insufficient exhaust gas, etc., to improve refining capacity, easy control of process conditions, and process cost. low cost effect

Active Publication Date: 2016-04-06
太湖县光华铝业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the characteristics of the aluminum element, the aluminum alloy has a strong tendency to produce pores, and it is also very easy to produce oxidized inclusions, and the pores are mainly produced by hydrogen gas. In the prior art, the production process of producing aluminum-silicon alloy ingots with recycled aluminum has a high exhaust rate. The gas is not thorough enough, and the secondary oxidation rate is high, which seriously affects the quality of the finished product

Method used

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  • Production Technology of High Density Al-Si Alloy Ingot
  • Production Technology of High Density Al-Si Alloy Ingot
  • Production Technology of High Density Al-Si Alloy Ingot

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A. Preparation of refining agent:

[0024] Take NaCl: 30kg, KCl: 45kg, cryolite: 10kg, CaF 2 : 15kg; add appropriate amount of distilled water and stir evenly, carry out dehydration treatment after natural drying, and prepare the refining agent for subsequent use.

[0025] Described cryolite molecular formula is Na 3 AlF 6 , cryolite has a strong dissolved Al 2 o 3 The ability, added to the refining agent, can prevent and destroy Al 2 o 3 Formation, thereby reducing the formation of secondary oxides in molten aluminum.

[0026] B. Process the recycled aluminum into aluminum ingots, take 100kg of metal silicon powder and 900kg of aluminum ingots, put them into the furnace, keep the temperature at 680~750°C, keep the molten aluminum in a molten state, and remove slag.

[0027] C. Using nitrogen as a carrier, spray refining agent evenly from the bottom of the furnace, and the amount of refining agent used is 50kg.

[0028] D. Stand still for 10 minutes to make it s...

Embodiment 2

[0031] A. Preparation of refining agent:

[0032] Take includes NaCl: 35kg, KCl: 40kg, cryolite: 15kg, CaF 2 : 10kg; add appropriate amount of distilled water and stir evenly, carry out dehydration treatment after natural drying, and prepare the refining agent for future use.

[0033] B. Process the recycled aluminum into aluminum ingots, take 200kg of metal silicon powder and 800kg of aluminum ingots, put them into the furnace, keep the temperature at 680~750°C, keep the molten aluminum in a molten state, and remove slag.

[0034] C. Using nitrogen as a carrier, evenly spray refining agent from the bottom of the furnace, and the amount of refining agent used is 64kg.

[0035] D. Stand still for 10 minutes to make it settle and exhaust;

[0036] E. Cast ingots after filtering to get the finished product.

Embodiment 3

[0038] A. Preparation of refining agent:

[0039] Take includes NaCl: 35kg, KCl: 40kg, cryolite: 15kg, CaF 2 : 10kg; add appropriate amount of distilled water and stir evenly, carry out dehydration treatment after natural drying, and prepare the refining agent for future use.

[0040] B. Process the recycled aluminum into aluminum ingots, take 150kg of metal silicon powder and 850kg of aluminum ingots, put them into the furnace, keep the temperature at 680~750°C, keep the molten aluminum in a molten state, and remove slag.

[0041] C. Using nitrogen as a carrier, uniformly spray refining agent from the bottom of the furnace, and the amount of refining agent used is 60kg.

[0042] D. Stand still for 10 minutes to make it settle and exhaust;

[0043] E. Cast ingots after filtering to get the finished product.

[0044] The produced product of above-mentioned embodiment reaches following index through testing:

[0045]

[0046] It can be seen from the metallographic structu...

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Abstract

The invention provides a technology for producing a high-density aluminum-silicon alloy ingot. A gas in molten aluminum can be effectively removed, and the technology is high in impurity removal rate and good in product density. The technology comprises the following steps: preparing a refining agent which comprises the following components in parts by weight: 25-35 parts of NaCl, 40-50 parts of KCl, 5-15 parts of cryolite, and 5-15 parts of CaF2, namely, taking the components, and adding proper distilled water to evenly agitate; carrying out dehydration after naturally drying, so as to prepare the refining agent for later use; B, processing recovered aluminum into an aluminum ingot, taking metal silicon powder and the aluminum ingot according to the weight ratio of 10-20% to 80-90%, feeding to a smelting furnace, keeping the temperature at 680-750 DEG C, and drossing after keeping the molten aluminum into the molten state; C, with nitrogen as a carrier, evenly spraying the refining agent from the bottom of the smelting furnace; D, standing for 10 minutes to precipitate and exhaust; and E, casting the ingot after filtering, so as to obtain the finished product.

Description

technical field [0001] The invention relates to a production process of recycled aluminum, in particular to an aluminum-silicon alloy ingot production process. Background technique [0002] Recycled aluminum is aluminum ingots that meet the requirements of various standards and are produced by smelting and preparing recycled aluminum scrap parts or scraps and scrap aluminum wires in the process of producing aluminum products as the main raw materials. This kind of aluminum ingot adopts recycled waste aluminum, which has lower production cost, and it is the reuse of natural resources, which has strong vitality, especially in today's rapid development of science and technology and continuous improvement of people's living quality, the product update The frequency of replacement is accelerating, and the recycling and comprehensive utilization of waste products has become an important issue for the sustainable development of human beings. The production of recycled aluminum has ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/06C22C21/02
Inventor 余国华
Owner 太湖县光华铝业有限公司
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