Method for preparing Al-Ti-B intermediate alloy refining agent for aluminum

An intermediate alloy, al-ti-b technology, applied in the field of aluminum alloy refiner and its preparation, can solve the problems of slow reaction speed, high preparation temperature of oxide method, large amount of harmful gas emission of fluorine salt method, etc. Harmful gas reduction, good effect, and simple production process

Inactive Publication Date: 2012-07-04
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems of the existing method for preparing Al-Ti-B alloy refiner, the fluorine salt method has a large amount of harmf

Method used

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  • Method for preparing Al-Ti-B intermediate alloy refining agent for aluminum
  • Method for preparing Al-Ti-B intermediate alloy refining agent for aluminum
  • Method for preparing Al-Ti-B intermediate alloy refining agent for aluminum

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specific Embodiment approach 1

[0021] Specific embodiment 1: The preparation method of a kind of Al-Ti-B master alloy refiner for aluminum of the present embodiment is carried out according to the following steps: 1. Weigh 1% to 7% of pure Ti by mass percentage powder, 0.28% to 4.20% boric acid, 72% to 86% pure aluminum block and 1.71% to 17.1% potassium fluoroborate; then weigh 10% to 20% of the total mass of pure Ti powder, boric acid and potassium fluoroborate Potassium chlorate; 2. Add the pure Ti powder, boric acid, potassium fluoroborate and potassium chlorate weighed in step 1 into the powder mixer, and stir evenly at a speed of 100rpm to 300rpm to obtain a mixture; 3. The powder weighed in step 1 Put the pure aluminum block into the crucible, heat to 750°C-950°C to melt the pure aluminum block, then add the mixture obtained in step 2, and stir evenly at a speed of 200rpm-500rpm, and then heat it under the condition of 750°C-950°C Insulate for 15min to 50min to obtain the aluminum alloy melt; 4. Dega...

specific Embodiment approach 2

[0025] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1, 3% to 5% of pure Ti powder, 1% to 2% of boric acid, 78% to 82% pure aluminum block and 6%-12% potassium fluoroborate; then weigh 14%-16% potassium chlorate accounting for the total mass of pure Ti powder, boric acid and potassium fluoroborate. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0026] Specific embodiment three: the difference between this embodiment and specific embodiments one to two is: the degassing described in step four is to add a degassing agent with a graphite bell jar, stir at a speed of 60 ~ 120rpm for 2 ~ 5min, and then let it stand for 3 minutes ~8min for degassing. Others are the same as the specific embodiment 1 to 2.

[0027] The degassing agent in this embodiment is purchased from Zhongshan Huayu Nonferrous Metallurgical Materials Co., Ltd.

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Abstract

The invention discloses a method for preparing an Al-Ti-B intermediate alloy refining agent for aluminum, relates to a method for preparing an aluminum alloy refining agent, and aims to solve the technical problems of large harmful gas discharge amount of a fluoride salt method and high preparation temperature and low reaction speed of an oxide method in the conventional method for preparing the Al-Ti-B alloy refining agent. The preparation method comprises the following steps of: uniformly mixing pure Ti powder, boric acid, potassium fluoborate and potassium chlorate, adding a pure aluminum block, heating until the pure aluminum block is melted, degassing, slagging-off, and pouring to obtain the Al-Ti-B intermediate alloy refining agent for the aluminum. The production process is simple, the raw material source is wide, harmful gas discharged in the reaction process is greatly reduced, the prepared Al-Ti-B alloy refining agent has a good effect, and the method is applied to the field of aluminum industry.

Description

technical field [0001] The invention relates to an aluminum alloy refiner and a preparation method thereof. Background technique [0002] Al-Ti-B alloy refiner is currently the most widely used refiner, about 75% of the world's aluminum industry uses Al-Ti-B alloy for grain refinement. At present, there are many methods for producing Al-Ti-B alloys, mainly fluorine salt method and oxide method. The fluoride salt method is to add the alkali metal fluoride salt of Ti and B to the molten aluminum in a certain proportion, and form an Al-Ti-B master alloy through a certain process, but the raw materials in the fluoride salt method use materials containing Fluorine compounds release a large amount of fluoride during the reaction, which is very harmful to the environment and the health of operators; the oxide method is to add Ti and B oxides to the molten aluminum melt, and through the aluminothermic reduction reaction And generate Al-Ti-B master alloy, because B 2 o 3 The free...

Claims

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Application Information

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IPC IPC(8): C22C1/03C22C21/00
Inventor 冯义成王丽萍郭二军姜文勇康福伟
Owner HARBIN UNIV OF SCI & TECH
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