In-situ optimization of titanium-containing blast furnace slag preparation method for photothermal coupling flue gas denitrification catalyst

A denitrification catalyst, photothermal coupling technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve difficult recycling, waste of resources, environmental pollution and other problems, to achieve the effect of simple and easy in-situ optimization process, uniform dispersion, and simple and easy reconstruction process

Active Publication Date: 2021-02-05
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TiO in the discharged titanium-containing blast furnace slag 2 The content is 23% to 25%, and it is dispersed in different mineral phases, so it is difficult to recycle economically and effectively
So far, Panzhihua Iron and Steel has produced and accumulated titanium-containing blast furnace slags that have reached tens of millions of tons, increasing at a rate of more than 3 million tons per year, accompanied by the discharge of a large amount of toxic and harmful waste water and waste gas, which not only wastes resources, but also causes severe environmental pollution

Method used

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  • In-situ optimization of titanium-containing blast furnace slag preparation method for photothermal coupling flue gas denitrification catalyst
  • In-situ optimization of titanium-containing blast furnace slag preparation method for photothermal coupling flue gas denitrification catalyst
  • In-situ optimization of titanium-containing blast furnace slag preparation method for photothermal coupling flue gas denitrification catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: The titanium-containing blast furnace slag is crushed, powdered and dried for later use; 100g of titanium-containing blast furnace slag and 10g of MnO 2 The powder is placed in an agate mortar, ground and mixed evenly, placed in a crucible, heated in a box furnace to 1500°C for 1 hour and cooled in the furnace; the above MnO 2 The in-situ optimization slag is used as powder in a powder tank for standby; take 100g of the above-mentioned in-situ optimization slag and 30g Na 2 CO 3 The powder is mixed and ground evenly, placed in a crucible and kept at 1500°C for 1 hour, and cooled naturally for later use; after grinding the reconstituted slag powder tank, take 10.0091g ​​of the powder and place it in 100mL of 8wt% hydrochloric acid solution at 30°C Stir for 60 minutes, filter to obtain the filter residue and filtrate, wash the filter residue with water, and dry to obtain the denitration catalyst.

Embodiment 2

[0021] Embodiment 2: the titanium-containing blast furnace slag is crushed, powdered and dried for later use; 100g of titanium-containing blast furnace slag and 10g of MnO 2 The powder is placed in an agate mortar, ground and mixed evenly, placed in a crucible, heated in a box furnace to 1500°C for 1 hour and cooled in the furnace; the above MnO 2 The in-situ optimization slag is used as powder in a powder tank for standby; take 100g of the above-mentioned in-situ optimization slag and 30g Na 2 CO 3 The powder is mixed and ground evenly, placed in a crucible and kept at 1500°C for 1 hour, and cooled naturally for later use; after grinding the reconstituted slag powder tank, take 10.0068g of powder, place it in 150mL of 10wt% hydrochloric acid solution, and stir at 25°C After 60 minutes, the filter residue and filtrate were obtained by filtration, and the filter residue was washed with water and dried to obtain the denitration catalyst.

Embodiment 3

[0022] Embodiment 3: the titanium-containing blast furnace slag is crushed, powdered and dried for later use; 100g of titanium-containing blast furnace slag and 10g of MnO 2 The powder is placed in an agate mortar, ground and mixed evenly, placed in a crucible, heated in a box furnace to 1500°C for 1 hour and cooled in the furnace; the above MnO 2 The in-situ optimization slag is used as powder in a powder tank for standby; take 100g of the above-mentioned in-situ optimization slag and 30g of Na2CO 3 The powder is mixed and ground evenly, placed in a crucible and kept at 1500°C for 1 hour, and cooled naturally for later use; after grinding the reconstituted slag powder tank, take 10.0166g of powder, place it in 100mL of 8wt% hydrochloric acid solution, and stir at 30°C After 30 minutes, the filter residue and filtrate were obtained by filtration, and the filter residue was washed with water and dried to obtain the denitration catalyst.

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Abstract

The invention provides a method for in-situ optimization of titanium-containing blast furnace slag to prepare a photothermal coupling flue gas denitrification catalyst, which belongs to the technical field of blast furnace slag application. In this method, titanium-containing blast furnace slag powder and MnO 2 The powder was ground and mixed evenly and placed in a crucible, heated to a molten state and kept for 1 hour, then naturally cooled to obtain in-situ optimized titanium-containing blast furnace slag, and then the in-situ optimized titanium-containing blast furnace slag powder was mixed with Na 2 CO 3 The powder is mixed and ground evenly and placed in a crucible to obtain reconstituted titanium-containing blast furnace slag. Put the reconstituted titanium-containing blast furnace slag powder in hydrochloric acid solution, stir and react for 20-80 minutes at a temperature of 20-60°C, and then filter and washed with water until neutral, and dried to obtain a photothermal coupling flue gas denitrification catalyst. The invention is simple and easy to operate, effectively realizes the recovery and utilization of the Ti component in the titanium-containing blast furnace slag, increases the added value of the titanium-containing blast furnace slag, and broadens the application field of the blast furnace slag; Reach 93% denitrification efficiency.

Description

Technical field: [0001] The invention belongs to the technical field of blast furnace slag application, and in particular relates to a method for preparing a photothermal coupling flue gas denitrification catalyst by using titanium-containing blast furnace slag as a raw material. Background technique: [0002] With the progress of society and the development of science and technology, and the continuous improvement of the quality of life, human demand for non-renewable mineral resources has increased sharply, and a large amount of metallurgical solid waste and toxic and harmful gases have been produced in metal smelting. For example: Panzhihua Iron and Steel mainly adopts the blast furnace smelting process to smelt vanadium-titanium magnetite, which produces a large amount of titanium-containing blast furnace slag, accompanied by the discharge of a large amount of toxic and harmful waste water and waste gas. Although scientists have done a lot of research on it, they have no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J35/02B01D53/86B01D53/56
CPCB01D53/8628B01D2257/404B01D2258/0283B01D2259/80B01J23/34B01J35/004B01J35/026
Inventor 吕辉鸿张正利李肖昴武杏荣李辽沙
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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