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Method for purifying aluminum-silicon-iron alloy through high-temperature and low-temperature two-step remelting centrifugal separation

A centrifugal separation and ferroalloy technology, applied in the field of smelting, can solve the problems of inability to carry out high-efficiency and large-scale practical applications, and achieve significant social and economic benefits, rational use of resources, and the effect of reducing iron content

Pending Publication Date: 2022-01-07
内蒙古君成科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is a fatal problem in this process: centrifugal separation is carried out in a high-temperature liquid state, and the high-temperature molten aluminum alloy is extremely corrosive to various metal materials, so it is difficult to find a material at a low cost that can be used at high temperatures. High-strength and resistant to high-temperature molten aluminum corrosion
Therefore, this process cannot be applied efficiently and on a large scale.

Method used

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  • Method for purifying aluminum-silicon-iron alloy through high-temperature and low-temperature two-step remelting centrifugal separation
  • Method for purifying aluminum-silicon-iron alloy through high-temperature and low-temperature two-step remelting centrifugal separation

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Embodiment 1

[0030] A high-temperature, low-temperature two-step remelting centrifugal separation method for purifying Al-Si-Fe alloy, the process flow chart is as follows figure 2 shown, including the following steps:

[0031] Put 100kg of Al-Si-Fe alloy into an intermediate frequency furnace for high-temperature smelting, the temperature of the molten material is 1400-1600°C, and the Al-Si-Fe alloy composition is 52.45% of Al, 41.98% of Si, and 2.65% of Fe. Al-Si-Fe alloy melt; cast the melt in a mold, then cool down to 900°C at 2°C / min, keep it at this temperature for 120min, let the alloy phase precipitate and grow, and then cool naturally to room temperature to obtain first-grade aluminum Ferrosilicon alloy block. Such as figure 1 As shown, the alloy phase diagram of the present invention shows that when the cooling temperature drops to 950-1000°C, silicon crystals first precipitate and grow up, and as the cooling temperature decreases, the silicon content in the melt gradually dec...

Embodiment 2

[0034] A high-temperature, low-temperature two-step remelting centrifugal separation method for purifying Al-Si-Fe alloy, the process flow chart is as follows figure 2 shown, including the following steps:

[0035] Put 100kg of Al-Si-Fe alloy into an intermediate frequency furnace for high-temperature smelting, the temperature of the molten material is 1400-1600°C, and the Al-Si-Fe alloy composition is 52.45% by Al, 41.98% by Si and 2.65% by Fe. Aluminum-silicon-iron alloy melt; cast the melt in a mold, then cool down to 950°C at 5°C / min, keep it at this temperature for 90min, let the alloy phase precipitate and grow, and then cool naturally to room temperature to obtain first-grade aluminum Ferrosilicon block. Such as figure 1 As shown, the phase diagram of the alloy of the present invention shows that when the cooling temperature drops to 950-1000°C, silicon crystals first precipitate and grow up. As the cooling temperature decreases, the silicon content in the melt gradu...

Embodiment 3

[0038] A high-temperature, low-temperature two-step remelting centrifugal separation method for purifying Al-Si-Fe alloy, the process flow chart is as follows figure 2 shown, including the following steps:

[0039] Put 100kg of Al-Si-Fe alloy into an intermediate frequency furnace for high-temperature smelting, the temperature of the molten material is 1400-1600°C, and the Al-Si-Fe alloy composition is 52.45% by Al, 41.98% by Si and 2.65% by Fe. Aluminum-silicon-iron alloy melt; cast the melt in a mold, then cool down to 950°C at 5°C / min, keep it at this temperature for 90min, let the alloy phase precipitate and grow, and then cool naturally to room temperature to obtain first-grade aluminum Ferrosilicon block. Such as figure 1 As shown, the phase diagram of the alloy of the present invention shows that when the cooling temperature drops to 950-1000°C, silicon crystals first precipitate and grow up. As the cooling temperature decreases, the silicon content in the melt gradu...

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Abstract

The invention discloses a method for purifying an aluminum-silicon-iron alloy through high-temperature and low-temperature two-step remelting centrifugal separation. The method comprises the following steps: (1) the aluminum-silicon-iron alloy is put into an intermediate frequency furnace for high-temperature smelting to obtain an aluminum-silicon-iron alloy melt; (2) the molten mass is cast in a mold, and the cooling speed and time are controlled to obtain a primary aluminum-silicon-iron alloy block; (3) the alloy block is loaded into a supergravity centrifugal device with a heating device, high-temperature heating is conducted, under the action of supergravity, molten liquid passes through a porous filter plate and then is cooled and solidified, a secondary aluminum-silicon-iron alloy block is obtained, and molten slag is industrial silicon; and (4) the alloy block continues to be heated to low temperature, under the effect of supergravity, molten liquid passes through the porous filter plate and then is cooled and solidified, aluminum-silicon alloy is obtained, and molten slag is aluminum-silicon-iron alloy. According to the method, the step-by-step remelting-supergravity centrifugation technology is adopted, graded purification of the aluminum-silicon-iron alloy is achieved, various high-grade products are obtained, the production efficiency is high, environmental pollution is avoided, industrial popularization is easy, and social benefits and economic benefits are remarkable.

Description

technical field [0001] The invention belongs to the technical field of smelting, and in particular relates to a high-temperature and low-temperature two-step remelting and centrifugal separation method for purifying aluminum-silicon-iron alloys. Background technique [0002] At present, there are mainly two methods for producing Al-Si-Fe alloys, namely blending method and electrothermal reduction method. Among them, the electrothermal reduction method is internationally recognized as being superior to the blending method to produce aluminum-silicon alloys. This method can not only shorten the process flow and reduce production costs, but also can use clay and kaolinite, kyanite, coal gangue, Non-bauxite resources such as fly ash are in line with the characteristics of aluminum resources in my country. In the prior art, patent CN1654689A discloses a method for producing ferrosilicon alloy using coal gangue as raw material; patent CN101942561A discloses a method for preparing ...

Claims

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Application Information

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IPC IPC(8): C22B9/02B22D27/04
CPCC22B9/023C22B9/02B22D27/04Y02P10/20
Inventor 魏存弟陈禹材徐少南程妍
Owner 内蒙古君成科技有限公司
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