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Low-temperature rapidly-smelting process for regenerative aluminum alloy

An aluminum alloy and recycled aluminum technology, applied in the direction of improving process efficiency, can solve the problems of reducing the recovery rate of scrap aluminum, prolonging the smelting temperature, and reducing the output of recycled aluminum, so as to increase production output, shorten smelting time, and reduce consumption. The effect of oil reduction

Active Publication Date: 2012-12-26
JIANGSU HAIGUANG METAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using a smelting temperature above 850°C will cause many problems in the smelting of recycled aluminum, for example: high temperature will cause oxidation and burning of recycled aluminum and its alloys, resulting in a decrease in the recovery rate of waste aluminum, which is less than 90%, affecting product quality. And the energy consumption is quite high. The fuel consumption per ton of product is generally more than 90 kg, and may even reach 100-120 kg.
If the low temperature smelting method can be used to partially solve the above problems, however, the reduction of smelting temperature will inevitably prolong the smelting time, reduce the output of secondary aluminum, and affect the production efficiency of secondary aluminum

Method used

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  • Low-temperature rapidly-smelting process for regenerative aluminum alloy
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  • Low-temperature rapidly-smelting process for regenerative aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Using low-temperature reflection and low-temperature flame-spraying smelting technology to produce ADC-12 aluminum ingot products, 20-25 tons of aluminum alloy raw materials per furnace, the production process steps are as follows:

[0027] (1) Sorting of raw materials: Sorting recycled aluminum alloy raw materials according to raw aluminum and cooked aluminum, using a spectrum tester to classify the components, and performing proportioning and feeding according to the ADC-12 aluminum ingot product standard;

[0028] (2) Melting:

[0029] a. Feeding: preheat the smelting furnace, feed and smelt the regenerated aluminum material with a good ratio according to the feeding order of first large and then small, first heavy and then light, first thick and then thin, and the feeding frequency is 2-8 times;

[0030] b. Rough smelting: The recycled aluminum is smelted by the smelting technology combining low-temperature reflection and low-temperature flame spraying.

[0031] Th...

Embodiment 2

[0037] Embodiment 2 comparative test

[0038] Using low-temperature reflective smelting technology to produce ADC-12 aluminum ingot products, 20-25 tons of aluminum alloy raw materials per furnace, the production process steps are as in Example 1, the difference is that the above-mentioned front and rear nozzles are both in the shape of a symmetrical circular table , together with low-temperature reflection technology for melting aluminum alloy.

[0039] According to the ADC-12 secondary aluminum produced by this method, its daily output statistical table is shown in Table 2 below:

[0040] Table 2 Statistical table of daily output of low temperature reflective smelting technology:

[0041] .

Embodiment 3

[0043] Compare the result of embodiment 1 and embodiment 2, as shown in table 3 below:

[0044] Table 3 Comparison of the test results of the low-temperature reflective melting technology and the combination of low-temperature reflective and low-temperature flame-injection melting technology:

[0045] .

[0046] It can be seen from the above table that the smelting technology combining low-temperature reflection and low-temperature spraying fire can control the time from feeding to the completion of aluminum ingot casting for an average of about 4 hours, which is 2 hours shorter than that of low-temperature reflection smelting technology, which greatly improves The production output of recycled aluminum ingots has been increased by 62.6%, and the fuel consumption per ton of ADC-12 aluminum ingots can be reduced by 12.17%.

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Abstract

The invention discloses a low-temperature rapidly-smelting process for a regenerative aluminum alloy. The low-temperature rapidly-smelting process comprises the following procedures of sorting raw materials, smelting and casting. The innovative points are that: a smelting technology of combining original low-temperature reflection and low-temperature fire spraying is adopted in a smelting section, and regenerative aluminum materials are smelted at the temperature of between 580 and 680 DEG C. The method has the advantages that: when the technology is used for smelting, the time from feeding to casting aluminum ingots can be controlled to be within in 3 to 4 hours and is shortened by 2 to 3 hours compared with that in the general process; the production yield of the regenerative aluminum ingots is greatly improved; the yield can be improved by more than 50 percent; and the fuel consumption is reduced by more than 1 percent.

Description

technical field [0001] The invention relates to a regenerated aluminum alloy smelting process, in particular to a low-temperature rapid smelting technology of a regenerated aluminum alloy. Background technique [0002] Aluminum is a recyclable resource with good recyclability. Recycled aluminum is to re-melt waste aluminum and waste aluminum alloy materials to obtain aluminum alloy or aluminum metal. The development of waste aluminum resources can not only save energy and reduce production costs, but also reduce environmental pollution and improve the ecological environment. Therefore, research on recycled aluminum has gradually become a hot spot in the development of the aluminum industry. [0003] When secondary aluminum is smelted, high-temperature smelting technology is usually used to fully melt the waste aluminum material. However, using a smelting temperature above 850°C will cause many problems in the smelting of recycled aluminum, for example: high temperature wi...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B21/00
CPCY02P10/20
Inventor 纪建李侠王楚均卢建明
Owner JIANGSU HAIGUANG METAL