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Method for directly cast-rolling electrolytic molten aluminum

An electrolytic aluminum liquid and direct technology, applied in the field of alloy smelting process in aluminum casting and rolling, can solve the problem of inability to meet the requirements of product grain size and slag removal and degassing, large slag inclusion and gas content, and impact on the quality of casting and rolling billets, etc. problems, to achieve good degassing and slag removal, reduce fuel consumption, and reduce labor intensity.

Active Publication Date: 2013-01-02
XINJIANG NONGLIUSHI ALUMINUM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the further increase of the proportion of electrolytic aluminum liquid, the problems of small number of crystal nuclei, slag inclusion and large gas content are particularly prominent. The original production process will not be able to meet the requirements of controlling the grain size of the product and removing slag and gas. The quality of cast and rolled billets will be greatly affected

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] To produce 1235 brand aluminum alloy, the furnace load is 20t, the batching plan is 16t of electrolytic aluminum liquid, 4t of solid aluminum, and the proportion of electrolytic aluminum liquid is 80%.

[0018] Feeding: add 18Kg slag agent and 2t solid aluminum (solid aluminum can be aluminum ingot or scrap aluminum) into the melting furnace, the amount of slag agent added is calculated at 0.8-1.2kg per ton of aluminum, and then add 16t electrolytic aluminum liquid , to melt the solid aluminum, cool down the electrolytic aluminum liquid to 780°C, then add the remaining 2t of solid aluminum, lower the temperature to 660°C, start heating, and then add the intermediate alloy material after the solid aluminum is melted, adjust the composition of the aluminum liquid, after 15 minutes stirring slag;

[0019] Refining in smelting furnace: Measure the temperature of the aluminum melt. When the temperature reaches 730-780°C, take a sample to analyze the composition of the alumin...

Embodiment 2

[0023] For the production of 3102 brand aluminum alloy, the furnace load is 20t, and the batching plan is 20t of electrolytic aluminum liquid, so that the proportion of electrolytic aluminum liquid is 100%.

[0024] Feeding: Add 20Kg of slagging agent to the melting furnace, the amount of slagging agent added is calculated as 0.8-1.2kg per ton of aluminum, then add 20t of electrolytic aluminum liquid to melt the solid aluminum, cool the electrolytic aluminum liquid to 730°C, and then Add 500kg of waste aluminum, stir with electromagnetic for 10min, the temperature drops to 680°C, start heating, add intermediate alloy material after 5min, adjust the composition, stir and remove slag after 10min;

[0025] Refining in smelting furnace: Measure the temperature of the aluminum melt. When the temperature reaches 730-780°C, take a sample to analyze the composition, and then conduct 20 minutes of powder spraying refining. The amount of refining agent is 32Kg (the refining agent is calc...

Embodiment 3

[0029] To produce 5052 brand aluminum alloy, the furnace load is 20t, the batching plan is 17t electrolytic aluminum liquid, 3t solid aluminum, and the proportion of electrolytic aluminum liquid is 85%.

[0030] Feeding: add 16Kg of slag-removing agent and 1t of solid aluminum (solid aluminum can be aluminum ingot or scrap aluminum) into the smelting furnace, the amount of slag-removing agent is calculated at 0.8-1.2kg per ton of aluminum, and then add 17t of hot electrolytic aluminum Liquid, to melt the solid aluminum, cool the electrolytic aluminum liquid to 745°C, then add the remaining 2t of solid aluminum, lower the temperature to 700°C, start heating, and then add the intermediate alloy material after the solid aluminum is melted, adjust the composition, and stir after 15 minutes slag;

[0031] Refining in smelting furnace: measure the temperature of aluminum melt, when the temperature reaches 730-780°C, take a sample to analyze the composition, and then carry out 15min ...

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PUM

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Abstract

The invention discloses a method for directly cast-rolling electrolytic molten aluminum. The method includes technological processes of compounding, charging, heating and ingredient adjusting, refining in a smelting furnace, pouring of molten aluminum into a standing furnace, refining in the standing furnace, on-line degassing, on-line filtering and rolling. The charging process includes adding slag shredding agents and solid aluminum accounting for 0% to 10% of a batch into the smelting furnace, adding electrolytic molten aluminum accounting for 80% to 100% of the batch, cooling the furnace to 730 DEG C to 780 DEG C and adding the solid aluminum accounting for 1% to 15% of the batch and cooling the furnace to 660 DEG C to 700 DEG C. According to the method for directly cast-rolling electrolytic molten aluminum, the ratio of electrolytic molten aluminum is improved to 80% to 100%, and the crystal nucleus number in the electrolytic molten aluminum is increased by changing methods of the adding process and the like, accordingly, quality demands of cast-rolling blanks and products are met.

Description

technical field [0001] The invention relates to a method of alloy smelting process in aluminum casting and rolling, in particular to a method of directly carrying out casting and rolling production of electrolytic aluminum liquid. Background technique [0002] Compared with the traditional aluminum ingot remelting production process, direct casting and rolling of electrolytic aluminum liquid has obvious advantages such as energy saving, low cost, and environmental protection. By adding a certain proportion of solid material for treatment, the number of crystal nuclei can meet the requirements of casting and rolling billet production. At present, electrolytic aluminum liquid is used for casting and rolling production. The proportion of electrolytic aluminum liquid is 60-70%. After batching → feeding → composition adjustment melting → refining in the furnace → pouring into the static furnace → refining in the static furnace → online degassing → online filtration → The rolling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/116B22D11/117B22D11/06C22B21/06
Inventor 唐新文董景伟
Owner XINJIANG NONGLIUSHI ALUMINUM
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