Method for preparing aluminum-titanium intermediate alloy by recycling titanium scrap or titanium leftover material

A technology for master alloys and scraps is applied in the field of preparing aluminum-titanium master alloys, which can solve the problems of low utilization rate of titanium scraps or titanium scraps, and achieve the effects of saving cost and energy consumption, simple production process and reducing production costs.

Inactive Publication Date: 2014-05-07
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low recycling rate of titanium shavings or titanium scraps generated during the production and processing of existing titanium products, and to provide a method for preparing aluminum-titanium master alloys by recycling titanium scraps or titanium scraps

Method used

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  • Method for preparing aluminum-titanium intermediate alloy by recycling titanium scrap or titanium leftover material
  • Method for preparing aluminum-titanium intermediate alloy by recycling titanium scrap or titanium leftover material
  • Method for preparing aluminum-titanium intermediate alloy by recycling titanium scrap or titanium leftover material

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specific Embodiment approach 1

[0012] Specific implementation mode 1: In this implementation mode, the method for preparing an aluminum-titanium master alloy by recycling titanium shavings or titanium scraps is implemented according to the following steps:

[0013] 1. Pulverize the titanium shavings or titanium scraps produced in the production and processing on the crusher, and dry the titanium blocks obtained after degreasing, and then pack the dried titanium blocks into bags with aluminum foil to obtain bagged titanium blocks;

[0014] 2. After melting pure aluminum in the melting furnace, evenly sprinkle the preheated covering agent on the surface to obtain molten aluminum;

[0015] 3. Raise the temperature of the molten aluminum to 850-880°C, add 1 / 2 of the required bagged titanium block according to the mass ratio of aluminum to titanium in the aluminum-titanium master alloy to be prepared by using the bell jar press-in method, and stir for 15-20 minutes Keep warm for 4 to 5 minutes, then add the rema...

specific Embodiment approach 2

[0019] Embodiment 2: This embodiment differs from Embodiment 1 in that the size of the titanium block obtained by crushing in step 1 is less than 5 mm. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0020] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the aluminum foil used in step 1 is a medium-thick foil of 0.025-0.05 mm or a thick foil of 0.05-0.2 mm. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention relates to a method for preparing an aluminum-titanium intermediate alloy by recycling titanium scrap and titanium leftover material, relates to a method for preparing an aluminum-titanium intermediate alloy, and aims at solving the problem of low recycling rate of the titanium scrap or titanium leftover material generated in the production process of existing titanium products. The preparation method comprises the following steps: (I) grinding the titanium scrap or titanium leftover material on a grinder, removing oil and drying, and packaging with aluminum foil into bags to obtain titanium blocks in bags; (II) melting pure aluminum in a smelting furnace to obtain molten aluminum; (III) increasing the temperature of the molten aluminum, adding part of the titanium blocks in bags by a bell jar press-in way, stirring for a period of time, adding the rest titanium blocks in bags, and continuously stirring to obtain the molten aluminum; (IV) removing gas by use of a rotary degasser, and performing slagging-off and casting and ingot formation to obtain the aluminum-titanium intermediate alloy. According to the method provided by the invention, the waste titanium scrap and titanium leftover material generated in the machining process of the titanium product are recycled, and then, the recycling rate of the titanium element reaches 85-90%.

Description

technical field [0001] The invention relates to a method for preparing an aluminum-titanium master alloy, in particular to a method for preparing an aluminum-titanium master alloy by using titanium shavings or titanium scraps. Background technique [0002] With the increasingly wide application of titanium metal, titanium shavings and titanium scraps generated during the production and processing of titanium products are increasing. The data shows that the waste titanium generated in the production process of titanium materials and titanium parts accounts for about 60% to 70% of the weight of the smelted metal, and the waste titanium scrap generated reaches 1 / 3. The commonly used recycling method is recycling in front of the furnace, crushing titanium shavings, titanium scraps and defective castings that meet the requirements of direct remelting, and putting them back into electric arc melting furnaces, electrolytic refining furnaces or induction melting furnaces for remelti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/02C22C1/06C22C21/00
Inventor 胡茂良王春雷吉泽升许红雨董浩
Owner HARBIN UNIV OF SCI & TECH
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