Preparation of tial by using Fe-containing waste aluminum alloy and waste SCR catalyst 3 Methods for Alloys and Low Fe Aluminum Alloys

A technology of SCR catalyst and waste aluminum alloy, which is applied in the field of resource utilization of solid waste to achieve the effect of low-cost, environment-friendly resource utilization

Active Publication Date: 2022-05-27
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention aims at the resource utilization of Fe-containing waste aluminum alloys and waste SCR catalysts in the prior art, and provides a method for preparing TiAl by using Fe-containing waste aluminum alloys and waste SCR catalysts. 3 alloy and low-Fe aluminum alloy method, the present invention uses Fe-containing waste aluminum alloy and waste SCR catalyst for reduction smelting, and then performs directional solidification phase separation and purification on the Ti-Al alloy prepared by reduction to prepare TiAl 3 alloys and low-Fe aluminum alloys

Method used

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  • Preparation of tial by using Fe-containing waste aluminum alloy and waste SCR catalyst <sub>3</sub> Methods for Alloys and Low Fe Aluminum Alloys
  • Preparation of tial by using Fe-containing waste aluminum alloy and waste SCR catalyst <sub>3</sub> Methods for Alloys and Low Fe Aluminum Alloys

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1: Preparation of TiAl using Fe-containing waste aluminum alloy and waste SCR catalyst 3 Alloys and methods for low Fe aluminium alloys (see figure 1 ),Specific steps are as follows:

[0023] (1) The waste SCR catalyst (TiO 2 The content is 75wt%, the main impurities and their content are 3.63wt% WO 3 , 1.20wt% V 2 O 5 , 4.32wt% SiO 2 , 1.32wt%CaO and 1.84wt%Al 2 O 3 ), Fe-containing scrap aluminum alloy (containing 1.75wt% Fe, 5.18wt% Si, 0.58wt% Mg, 1.27wt% Zn, 0.86wt% Mn and 1.50wt% Cu) and slag formers (CaO and Al 2 O 3 ) mixed uniformly, and then placed in an inert atmosphere (argon) and the temperature was 1873K for 180min reduction and smelting. After separation of slag and gold, Ti-Al alloy and waste slag containing 23.1wt% Ti were obtained; the waste SCR catalyst, Fe-containing Scrap aluminium alloys, CaO and Al 2 O 3 The mass ratio of 27:50:13:9;

[0024] (2) Place the Ti-Al alloy in step (1) in a resistance-heated directional solidificatio...

Embodiment 2

[0027] Example 2: Preparation of TiAl using Fe-containing waste aluminum alloy and waste SCR catalyst 3 Alloys and methods for low Fe aluminium alloys (see figure 1 ),Specific steps are as follows:

[0028] (1) The waste SCR catalyst (TiO 2 The content is 75wt%, the main impurities and their content are 3.63wt% WO 3 , 1.20wt% V 2 O 5 , 4.32wt% SiO 2 , 1.32wt%CaO and 1.84wt%Al 2 O 3 ), Fe-containing scrap aluminum alloy (containing 1.01wt% Fe, 2.41wt% Si, 0.89wt% Mg, 1.25wt% Zn, 0.52wt% Mn and 0.95wt% Cu) and slag formers (CaO and Al 2 O 3) mixed uniformly, and then placed in an inert atmosphere (argon) and the temperature was 1973K for 120min reduction and smelting, and after separation of the slag and gold, a Ti-Al alloy and waste slag containing 23.9wt% Ti were obtained; the waste SCR catalyst, Fe-containing Scrap aluminium alloys, CaO and Al 2 O 3 The mass ratio of 27:50:12:8;

[0029] (2) placing the Ti-Al alloy in step (1) in a directional solidification furna...

Embodiment 3

[0032] Example 3: Preparation of TiAl using Fe-containing waste aluminum alloy and waste SCR catalyst 3 Alloys and methods for low Fe aluminium alloys (see figure 1 ),Specific steps are as follows:

[0033] (1) The waste SCR catalyst (TiO 2 The content is 75wt%, the main impurities and their content are 3.63wt% WO 3 , 1.20wt% V 2 O 5 , 4.32wt% SiO 2 , 1.32wt%CaO and 1.84wt%Al 2 O 3 ), Fe-containing scrap aluminum alloy (containing 1.59wt% Fe, 1.51wt% Si, 0.82wt% Mg, 0.95wt% Zn, 0.31wt% Mn and 0.11wt% Cu) and slag-forming agent (CaO) were mixed uniformly, and then It was placed in an inert atmosphere (argon) and the temperature was 1873K for 60min reduction and smelting. After separation of slag and gold, Ti-Al alloy and waste slag containing 22.1wt% Ti were obtained; the waste SCR catalyst, Fe-containing waste aluminum alloy and CaO The mass ratio of 27:50:13;

[0034] (2) Place the Ti-Al alloy in step (1) in a directional solidification furnace heated by electromagne...

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Abstract

The invention relates to a method for preparing TiAl by using Fe-containing waste aluminum alloy and waste SCR catalyst 3 The method for alloy and low-Fe aluminum alloy belongs to the technical field of solid waste resource utilization. In the present invention, the waste SCR catalyst, the waste aluminum alloy containing Fe and the slagging agent are uniformly mixed, and then placed in an inert atmosphere and the temperature is not lower than 1873K for reduction melting, and the Ti-Al alloy and the waste slag are obtained after the slag and gold are separated, and the Ti The ‑Al alloy is heated to a molten state under an inert atmosphere or vacuum to obtain a Ti‑Al alloy melt, and the Ti‑Al alloy melt is separated and purified by directional solidification to obtain a titanium-aluminum alloy ingot. 3 Alloy, Fe-Mn impurity-rich phase, low-Fe aluminum alloy and impurity-rich phase by boundary cutting to obtain TiAl 3 alloys and low-Fe aluminum alloys. The invention can realize the simultaneous recovery of waste SCR catalysts and Fe-containing waste aluminum alloys, and prepare them into TiAl 3 alloys and low-Fe aluminum alloys.

Description

technical field [0001] The invention relates to the preparation of TiAl by utilizing Fe-containing waste aluminum alloy and waste SCR catalyst 3 The method for alloying and low-Fe aluminum alloy belongs to the technical field of solid waste resource utilization. Background technique [0002] TiAl 3 As a lightweight high temperature structural material, alloy has the characteristics of low density, good high temperature creep resistance, excellent high temperature resistance and good elastic modulus. oxide film material. [0003] With the rapid development of NOx reduction efforts, the selective catalytic reduction (SCR) denitrification process has been widely used to control NO x The most efficient way to discharge. The most common SCR catalyst is V 2 O 5 -WO 3 / TiO 2 catalyst, which has high activity and resistance to SO 2 effect. However, due to the volatile active components, high temperature sintering, and poisoning by sulfates and alkaline earth metals, the SC...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22C21/00C22C1/02
CPCC22B7/004C22B7/009C22C21/003C22C1/026Y02P10/20
Inventor 雷云张亚坤马文会杨东方杨清源
Owner KUNMING UNIV OF SCI & TECH
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