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Method for preparing selective catalytic reduction SCR flue gas denitration catalyst and method for preparing raw material titanium-tungsten powder of SCR flue gas denitration catalyst

A technology of denitrification catalyst and titanium tungsten powder, which is applied in the direction of chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., which can solve the problem of high material consumption/energy consumption, low benefit, and cost Advanced problems, to achieve the effect of alleviating high prices, solving environmental problems, and reducing production costs

Active Publication Date: 2012-10-03
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The patents in the above-mentioned various utilization methods are technically feasible, but most of them are based on Ti and TiO 2 The extraction of slag requires a strict separation and purification process, which leads to problems such as large material consumption / energy consumption, high cost, and low benefit in the extraction process. Therefore, there is still no effective industrialized comprehensive utilization technology for Ti-containing blast furnace slag.

Method used

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  • Method for preparing selective catalytic reduction SCR flue gas denitration catalyst and method for preparing raw material titanium-tungsten powder of SCR flue gas denitration catalyst
  • Method for preparing selective catalytic reduction SCR flue gas denitration catalyst and method for preparing raw material titanium-tungsten powder of SCR flue gas denitration catalyst
  • Method for preparing selective catalytic reduction SCR flue gas denitration catalyst and method for preparing raw material titanium-tungsten powder of SCR flue gas denitration catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0070] Weigh 20g of titanium-containing blast furnace slag crushed to below 200 mesh, add 20% dilute sulfuric acid according to the mass of sulfuric acid (calculated as 100% sulfuric acid) : mass of blast furnace slag, and add blast furnace slag under constant stirring at 80°C. Thoroughly stir and leaching for 8 hours, after which centrifugation is carried out, the filter residue is washed 3 times with 10% dilute sulfuric acid, and the filtrate is collected for hydrolysis. Add activated carbon to the titanium solution (the amount added is TiO in titanium-containing blast furnace slag 2 20% of the mass, that is, 0.64g), add urea to adjust the pH of the titanium solution to 0.5, add ammonium metatungstate (according to WO 3 5% load), maintained at 40°C for 4h, and then raised to 105°C for 4h. After the reaction is completed, filter, and the filter residue is washed several times with dilute sulfuric acid, then washed with deionized water until neutral, dried, and then heated to...

Embodiment 2

[0072] Weigh 20g of titanium-containing blast furnace slag crushed to below 200 mesh, add 20% dilute sulfuric acid according to the mass of sulfuric acid (calculated as 100% sulfuric acid) : mass of blast furnace slag, and add blast furnace slag under constant stirring at 80°C. Thoroughly stirred and leached for 8 hours, and centrifuged after the end, the filter residue was washed 3 times with 10% dilute sulfuric acid, and the filtrate was collected for hydrolysis. Add activated carbon to the titanium solution (the amount added is TiO in titanium-containing blast furnace slag 2 50% of the mass, that is, 1.6g), add urea to adjust the pH of the titanium solution to 0.5, maintain it at 40°C for 2h, and then raise the temperature to 110°C for 8h. After the reaction is completed, filter, and the filter residue is washed several times with dilute sulfuric acid and then washed to neutrality with deionized water, and dried to obtain carrier-supported metatitanic acid, in which TiO 2 ...

Embodiment 3

[0074] Weigh 20g of titanium-containing blast furnace slag crushed to below 200 mesh, add 20% dilute sulfuric acid according to the mass of sulfuric acid (calculated as 100% sulfuric acid) : mass of blast furnace slag, and add blast furnace slag under constant stirring at 80°C. Thoroughly stir and leaching for 8 hours, after which centrifugation is carried out, the filter residue is washed 3 times with 10% dilute sulfuric acid, and the filtrate is collected for hydrolysis. Add activated carbon to the titanium solution (the amount added is TiO in titanium-containing blast furnace slag 2 20% of the mass, that is, 0.64g), add urea to adjust the pH of the titanium solution to 1.0, add ammonium metatungstate (according to WO 3 5% load), maintained at 40°C for 4h, and then raised to 105°C for 8h. After the reaction is completed, filter, and the filter residue is washed with dilute sulfuric acid for several times, then washed with deionized water until neutral, and dried to obtain a...

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Abstract

The invention relates to a method for preparing a selective catalytic reduction SCR flue gas denitration catalyst and a method for preparing a raw material titanium-tungsten powder of the SCR flue gas denitration catalyst. The method for preparing the SCR flue gas denitration catalyst comprises the followings: smashing titanium-bearing blast furnace slag, leaching TiO2 in the smashed titanium-bearing blast furnace slag with dilute sulphuric acid, filtering and separating the mixture to obtain residues and titanium solution, adding a porous catalyst carrier which is easy to be burnt off into the titanium solution and hydrolyzing the mixture; filtering, washing and drying the hydrolyzed product to obtain a carrier supported metatitanic acid, and further loading tungsten and vanadium on the metatitanic acid, and baking the obtained product to obtain a vanadium-tungsten-titanium SCR denitration catalyst. The method not only effectively utilizes valuable elements in blast furnace slag, solves the problems that the titanium dioxide product is extracted, separated and purified difficultly from the blast furnace slag, and the quality of the product cannot meet the standard easily, and also greatly reduces the production cost of the vanadium-tungsten-titanium SCR denitration catalyst and has a broad application prospect.

Description

technical field [0001] The invention relates to a method for preparing an SCR flue gas denitrification catalyst and its raw material titanium-tungsten powder, in particular to a method for preparing an SCR denitrification catalyst and its raw material titanium-tungsten powder by using titanium-containing blast furnace slag. Background technique [0002] A large amount of blast furnace slag will be discharged during the blast furnace ironmaking process. If it is not properly treated, it will occupy land, pollute the environment, and cause waste of resources. Blast furnace slag contains valuable metals such as titanium, silicon, aluminum, calcium, etc., which can be separated, extracted and processed into chemical products by appropriate methods, so as to solve the environmental pollution problems caused by the rational use of this industrial waste resource. [0003] TiO with titanium blast furnace slag 2 High grade and high recycling value. The recycling of titanium-contain...

Claims

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Application Information

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IPC IPC(8): B01J23/30B01D53/90B01D53/56
Inventor 杨娟余剑许光文
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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