Cleaning method of aluminum alloy dry cleaning furnace

A technology of aluminum alloy and aluminum ash, which is applied to the cleaning field of aluminum alloy dry cleaning furnace, can solve the problems of high cost and low work efficiency, and achieve the effects of improving work efficiency, reducing production cost and reducing abnormal production process.

Active Publication Date: 2018-06-01

长春隆达铝业有限公司

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AI-Extracted Technical Summary

Problems solved by technology

[0004] In order to solve the problems of high cost and low work efficiency when high impurities are converted to low-impurity pro...

Abstract

The invention dsiclsoes a cleaning method of an aluminum alloy dry cleaning furnace, and belongs to the field of alloy smelting. According to the cleaning method, the problems that in the aluminum alloy smelting process, when the products with high impurity volume change into the product with low impurity volume, the cost is high, and the working efficiency is low are solved. The method comprisesthe following steps that aluminum ash with 0.1-0.15% of a furnace set volume is put into a hearth of a dry cleaning furnace, the temperature is kept within the range of 850-900 DEG C, and the time is2 hours; the periphery of the hearth is uniformly stirred, aluminum ash adsorbs liquid aluminum separated out of the hearth, and the aluminum ash is pulled out after stirring; the aluminum ash with 0.05-0.1% of the furnace set volume is put into the hearth of the dry cleaning furnace, uniform stirring and paving are carried out, the temperature is kept within the range of 800-850 DEG C, and the time is 2 hours; and uniform stirring is carried out on the periphery in the hearth, so that the aluminum ash absorbs the liquid aluminum separated out of the hearth, and the aluminum ash is pulled outafter stirring. The cleaning method of the aluminum alloy dry cleaning furnace is high in working efficiency and low in production cost.

Application Domain

Process efficiency improvement

Technology Topic

Smelting processVolume change +4

Examples

Experimental program(3)

Example Embodiment

[0039] Example 1

[0040] A cleaning method for aluminum alloy dry-cleaning furnace mainly includes the following steps:

[0041] Step 1. Wash the furnace for the first time

[0042] Put the aluminum ash with a capacity of 1.2‰ of the furnace group into the furnace of the dry-cleaning furnace for the first time washing the furnace, stir and spread the aluminum ash evenly with a stirring rake, and keep the temperature at 875℃, and the temperature needs to be maintained for 2 hours; Stir uniformly all around, so that the slag absorbs the aluminum liquid deposited in the furnace, and it will be pulled out immediately after stirring.

[0043] Step two, the second washing furnace

[0044] Put the aluminum ash with a capacity of 0.75‰ of the furnace group into the furnace of the dry-cleaning furnace for the second time washing, stir and spread the aluminum ash with a stirring rake, and keep the temperature at 825℃, and the temperature needs to be maintained for 2 hours; Stir uniformly all around, so that the slag absorbs the aluminum liquid deposited in the furnace, and it will be pulled out immediately after stirring.

[0045] Step 3: Add 650kg of aluminum scraps into the furnace, stir evenly, make the aluminum scraps adsorb the molten aluminum at the bottom of the furnace, and stir them out.

[0046] Step 4. Wash the furnace for the third time

[0047] Put in A00 aluminum for melting. The input amount of A00 aluminum is 15% of the capacity of the furnace group. The melting temperature is maintained in the range of 810-840°C, kept in the furnace for 1 hour and fully stirred.

[0048] 5. Sampling and pre-analysis, until the impurity element content no longer changes, complete the cleaning.

[0049] After the furnace was washed, the components in the dry cleaning furnace were tested. The results are shown in Table 1.

Example Embodiment

[0050] Example 2

[0051] A cleaning method for aluminum alloy dry-cleaning furnace mainly includes the following steps:

[0052] Step 1. Wash the furnace for the first time

[0053] Put the aluminum ash with the capacity of 1‰ of the furnace group into the furnace of the dry-cleaning furnace for the first cleaning. Use a stirring rake to stir and spread the aluminum ash. Keep the temperature at 900℃, and the temperature needs to be maintained for 2 hours; Stir uniformly all around, so that the slag absorbs the aluminum liquid deposited in the furnace, and it will be pulled out immediately after stirring.

[0054] Step two, the second washing furnace

[0055] Put the aluminum ash with the capacity of 1.0‰ of the furnace group into the furnace of the dry-cleaning furnace for the second time washing, stir and spread the aluminum ash with a stirring rake, and keep the temperature at 850℃, and the temperature needs to be kept for 2 hours; Stir uniformly all around, so that the slag absorbs the aluminum liquid deposited in the furnace, and it will be pulled out immediately after stirring.

[0056] Step 3: Add 800kg of aluminum scraps into the furnace and stir evenly, so that the aluminum scraps are absorbed by the molten aluminum at the bottom of the furnace, and they are stirred out.

[0057] Step 4. Wash the furnace for the third time

[0058] Put A00 aluminum into it for melting. The input amount of A00 aluminum is 20% of the capacity of the furnace group. The melting temperature is maintained at 825°C, kept in the furnace for 0.5h and fully stirred.

[0059] 5. Sampling and pre-analysis, until the impurity element content no longer changes, complete the cleaning.

[0060] After the furnace was washed, the components in the dry cleaning furnace were tested. The results are shown in Table 1.

Example Embodiment

[0061] Example 3

[0062] A cleaning method for aluminum alloy dry-cleaning furnace mainly includes the following steps:

[0063] Step 1. Wash the furnace for the first time

[0064] Put the aluminum ash with a capacity of 1.5‰ of the furnace group into the furnace of the dry cleaning furnace to wash the furnace for the first time, stir and spread the aluminum ash evenly with a stirring rake, and keep the temperature at 850℃, and the temperature needs to be maintained for 2 hours; Stir uniformly all around, so that the slag absorbs the aluminum liquid deposited in the furnace, and it will be pulled out immediately after stirring.

[0065] Step two, the second washing furnace

[0066] Put the aluminum ash with a capacity of 0.5‰ of the furnace group into the furnace of the dry-cleaning furnace for the second time washing, stir and spread the aluminum ash with a stirring rake, and keep the temperature at 800℃, and the temperature needs to be maintained for 2 hours; Stir uniformly all around, so that the slag absorbs the aluminum liquid deposited in the furnace, and it will be pulled out immediately after stirring.

[0067] Step 3: Add 500kg of aluminum scraps into the furnace and stir evenly, so that the aluminum scraps are absorbed by the molten aluminum at the bottom of the furnace, and they are stirred out.

[0068] Step 4. Wash the furnace for the third time

[0069] Put A00 aluminum into it for melting, the input amount of A00 aluminum is 18% of the furnace group capacity, the melting temperature is maintained in the range of 820-850 ℃, kept in the furnace for 1 hour and fully stirred.

[0070] 5. Sampling and pre-analysis, until the impurity element content no longer changes, complete the cleaning.

[0071] After the furnace was washed, the components in the dry cleaning furnace were tested. The results are shown in Table 1.

[0072] Table 1 Chemical composition of production after washing furnace

[0073] Example

[0074] It can be seen from Examples 1-3 and Table 1 that through the cleaning method of the present invention, the impurity content of Fe, Cu, Zn meets the standard requirements of Fe≤0.12%, Cu≤0.03%, and Zn≤0.05% of the produced products; The production qualification rate of the first furnace after the furnace is 100%.

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Improve work efficiency
reduce manufacturing cost

Cleaning method of aluminum alloy dry cleaning furnace

AI-Extracted Technical Summary

Problems solved by technology

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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