High-efficiency clean Al-Ti-B refiner and preparation method thereof

A technology of al-ti-b and refiner, which is applied in the field of high-efficiency clean refiner and preparation, can solve the problems of low preparation efficiency, low preparation cost, and low refinement efficiency, and achieve improved refinement efficiency, Uniform distribution and small size effect

Inactive Publication Date: 2013-08-07
丹阳百斯特新型合金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The TiB2 particles in the tissue mostly exist in the form of aggregates, and the particles inside the aggregates are stuck together, the refinement efficiency is low, and serious pollution problems occur at the same time
In order to prepare high-efficiency Al-Ti-B refiners, various methods have been tried at home and abroad, such as oxide method, high-temperature self-propagating synthesis method, etc., but there are mainly disadvantages such as low preparation efficiency and low preparation cost.

Method used

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  • High-efficiency clean Al-Ti-B refiner and preparation method thereof
  • High-efficiency clean Al-Ti-B refiner and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The process of preparing Al-Ti-B refiner by contact reaction method is as follows:

[0019] 1. Raw material preparation, refiner by B 2 o 3 、TiO 2 , aluminum powder, aluminum ingot, C 2 Cl 6 It is prepared with cryolite covering agent, wherein the purity of aluminum ingot is 99.9%.

[0020] 2. Prepare 1Kg of refiner, weigh B as required 2 o 3 、TiO 2 , aluminum powder, aluminum ingot, according to the aluminum burning rate of 3%, require TiO 2 :B 2 o 3 : Al powder = 3: 4: 5 (mol), the rest is Al

[0021] 3 will be B 2 o 3 、TiO 2 The powder is heated at 300°C for two hours to remove the moisture.

[0022] 4. The heated TiO 2 and B 2 o 3 Mix the mixture with aluminum powder evenly, put the evenly mixed powder in the mold, and press it into 70×Φ80mm 3 cylindrical powder block.

[0023] 5. Apply a layer of paint to tools such as molds and slag scrapers to prevent Fe impurity elements from contaminating the refiner. A graphite crucible is selected for smel...

Embodiment 2

[0026] 1. Raw material preparation, refiner by B 2 o 3 、TiO 2 , aluminum powder, aluminum ingot, C 2 Cl 6 It is prepared with cryolite covering agent, wherein the purity of aluminum ingot is 99.9%.

[0027] 2. Prepare 500g of refiner, weigh B as required 2 o 3 、TiO 2 , aluminum powder, and aluminum ingots, the aluminum loss rate is 3%. Requires TiO 2 :B 2 o 3 :Al powder=1.3:2:2.5 (mol).

[0028] 3. Put B 2 o 3 、TiO 2 The powder is heated at 300°C for two hours to remove the moisture.

[0029] 4. The heated TiO 2 and B 2 o 3 Mix the mixture with aluminum powder evenly, put the evenly mixed powder in the mold, and press it into 90×Φ80mm 3 cylindrical powder block.

[0030] 5. Use a well-type resistance furnace to heat the cleaned aluminum ingot to 780°C. After the aluminum ingot is completely melted, cover it with a layer of cryolite to prevent the oxidation and gas absorption of aluminum; raise the furnace temperature to 950°C, and the graphite bell jar will ...

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Abstract

The invention relates to a high-efficiency clean Al-Ti-B refiner and a preparation method thereof, belonging to the technical field of refiners. The high-efficiency clean Al-Ti-B refiner comprises the following components in percentage by mass: 3.0-6.0% of Ti, 0.6-2% of B and the balance of Al. The phase composition comprises alpha-Al, TiAl3 and TiB2. The preparation method comprises the following steps: weighing B2O3, TiO2, aluminum powder and aluminum ingot according to requirements, wherein the TiO2:B2O3:Al powder ratio is (2.8-3.2):(3.5-4.2):(4.7-5.2)(mol), and the purity of the aluminum ingot is 99.9%; evenly mixing the TiO2 and B2O3, and heating at 300 DEG C for two hours; mixing the heated powder and aluminum powder, putting the mixture in a mold, and pressing into a block; melting the aluminum ingot by heating, and covering cryolite; and heating the melt, pressing into the block, stirring to react, pressing in C2Cl6, refining, removing slag, and casting. The invention utilizes low-cost raw materials; the dimension of the prepared TiB2 is 1 mu m; and the dimension of the TiAl3 is 3-30 mu m, and the TiAl3 is distributed uniformly.

Description

technical field [0001] The invention belongs to the technical field of refiners, and in particular relates to an efficient and clean refiner and a preparation method. Background technique [0002] At present, the refining agent widely used in the aluminum industry is Al-Ti-B intermediate alloy wire rod. Due to the backward production conditions and technical level, there is still a certain gap between the product and imported products, mainly reflected in the low B content and poor purity. The size, shape and distribution of the two phases are not up to standard. At present, a large number of Al-Ti-B master alloys are prepared industrially through the fluoride salt reaction method. The typical production process is: add K2TiF6 and KBF4 to the aluminum melt at 750-850 ° C, and fully react through mechanical stirring to prepare Al- Ti-B refiner. In the structure of the Al-Ti-B master alloy prepared by the fluoride salt reaction method, the TiAl3 phase is mostly agglomerated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/00C22C1/02
Inventor 陈子勇庄云平庄江华丁家伟耿德英李锡汉孙健戴艳
Owner 丹阳百斯特新型合金科技有限公司
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