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Method for preparing denitration catalyst from vanadium titano-magnetite

A vanadium-titanium magnetite and denitrification catalyst technology, which is applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve the problems of high preparation costs and high raw material costs, and reduce purchase costs , Reduce production costs, widen the effect of working temperature range

Pending Publication Date: 2020-10-02
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses titanium, tungsten, and vanadium pure materials as raw materials, and its preparation cost is high
The vanadium-titanium component is the most important component of the commonly used catalysts at present, and its raw material cost is high, which is the most important cost in the preparation of denitration catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0026] A method for preparing a denitrification catalyst using vanadium-titanium magnetite raw ore, first grinding the vanadium-titanium-magnetite to an average particle size of ≤0.5 mm, and blending the vanadium-titanium-magnetite processed through the grinding step to obtain blended sludge material; the mud contains vanadium, titanium, and tungsten components after the composition is adjusted, and V is calculated according to the oxide content 2 o 5 The content is 0.2wt.%, TiO 2 The content is 14wt.%, WO 3 The content is 9wt.%, and then it is prepared and shaped into pellets, and finally the temperature is raised to 300°C for 48 hours at a heating rate of 10°C / min to obtain a denitration catalyst.

Embodiment example 2

[0028] A method for preparing a denitrification catalyst using vanadium-titanium magnetite tailings, first grinding the vanadium-titanium-magnetite to an average particle size ≤ 0.5mm, and blending the vanadium-titanium-magnetite after the grinding step to obtain the blended Mud; the mud contains vanadium, titanium, and molybdenum components after the composition is adjusted, calculated by oxide content V 2 o 5 The content is 0.1wt.%, TiO 2 The content is 1wt.%, MoO 3 The content is 10wt.%, and then it is prepared and formed into a honeycomb body, and finally the temperature is raised to 350°C at a heating rate of 8°C / min and calcined for 32h to obtain a denitration catalyst.

Embodiment example 3

[0030] A method for preparing a denitrification catalyst using vanadium-titanium magnetite smelting vanadium slag, first grinding the vanadium-titanium magnetite to an average particle size of ≤0.5mm, and blending the vanadium-titanium magnetite processed through the grinding step to obtain Mud after blending; the mud after composition blending contains vanadium, titanium, and tungsten components, calculated by oxide content V 2 o 5 The content is 5wt.%, TiO 2 The content is 50wt.%, WO 3 The content is 8wt.%, and then it is prepared and formed into a corrugated plate, and finally the temperature is raised to 400°C at a heating rate of 6°C / min and roasted for 24 hours to obtain a denitration catalyst.

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Abstract

The invention provides a method for preparing a denitration catalyst from vanadium titano-magnetite raw ore, tailings, vanadium slag, blast furnace slag and desulfurization slag. The method comprisesthe steps of grinding, component blending, forming and roasting. The method comprises the following steps: crushing the vanadium titano-magnetite until the average particle size is less than or equalto 0.5 mm; performing component blending such that the content of V2O5 is 0.1-5 wt%, the content of TiO2 is 1-50 wt%, the content of WO3 or MoO3 is 0.5-10 wt%, and the balance being 35-98.4 wt%; and finally molding and roasting to obtain the denitration catalyst. According to the method for preparing the denitration catalyst from the vanadium titano-magnetite, high-valued utilization of the vanadium titano-magnetite raw ore, tailings and vanadium slag is achieved, the production cost of the denitration catalyst is reduced, and the method has important environmental benefits and economic value.

Description

technical field [0001] The invention belongs to the field of flue gas denitrification and resource high-value utilization, and specifically relates to a method for preparing a denitrification catalyst from vanadium-titanium magnetite. Background technique [0002] Selective Catalytic Reduction (SCR) technology is the realization of industrial flue gas NO x An important means of ultra-low emissions, and its denitrification catalyst is the core of the technology. At present, the widely used denitration catalysts are vanadium-titanium catalysts, wherein the raw materials of vanadium are usually soluble salts of vanadium, and titanium is titanium dioxide, which is expensive, resulting in high cost of denitration catalysts. Vanadium-titanium magnetite is a natural mineral, and the composition of vanadium-titanium magnetite in different origins is slightly different. Among them, the vanadium content is about 0.1-3%, the titanium content is about 1-30%, and the rest is mainly iron...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/28B01J23/30B01J35/02B01J35/04B01D53/86B01D53/56B01J35/00
CPCB01J23/30B01J23/28B01J23/002B01D53/8628B01J2523/00B01D2258/0283B01J35/50B01J35/00B01J35/30B01J35/40B01J35/56B01J2523/47B01J2523/55B01J2523/68B01J2523/69
Inventor 张柏林张深根
Owner UNIV OF SCI & TECH BEIJING
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