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A waste catalyst resource treatment method based on iron ore sintering process

A waste catalyst and sintering process technology, which is applied in the field of waste catalyst treatment based on the iron ore sintering process, can solve problems such as the impact on the quality of sintering ore

Active Publication Date: 2022-03-08
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the technical problem that the generated perovskite ore phase easily affects the sintering process and the quality of the sintered ore when the waste catalyst containing titanium is processed by the sintering process, and provides a waste catalyst based on the iron ore sintering process. Catalyst treatment method

Method used

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  • A waste catalyst resource treatment method based on iron ore sintering process
  • A waste catalyst resource treatment method based on iron ore sintering process
  • A waste catalyst resource treatment method based on iron ore sintering process

Examples

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Embodiment 1

[0037] The invention proposes a waste catalyst recycling treatment method based on the iron ore sintering process, which can properly solve the problem of waste catalyst recycling and utilization. The sinter produced by this method can meet the various metallurgical performance indicators of the sinter required by the blast furnace, and at the same time, metal elements such as V, W, and Ti in the spent catalyst can be recovered, providing a new treatment method for the efficient utilization of the spent catalyst.

[0038] Concrete experimental steps of the present invention are as follows:

[0039] Step 1: Physical treatment of spent catalyst and preparation of modified raw materials:

[0040] (1) Waste catalyst treatment and crushing: remove the blockage in the catalyst pores, and then blow with strong wind to remove the blockage dust in the catalyst pores, and then crush and grind the waste catalyst to obtain -200 mesh catalyst powder.

[0041] (2) Preparation of modified r...

Embodiment 2

[0081] The basic process of the new method of utilizing the metallurgical process to recover valuable metal elements in spent catalysts in this example is the same as that in Example 1, except that the proportion of spent catalysts added in the modified spent catalyst pellets in this example accounts for the iron-containing raw materials The total mass percentage is 1%, the mass percentage of iron oxide scale is 2%, and the mass percentage of returned ore is 1%; when the sintering raw material is mixed with flux, fuel and returned ore, the amount of spent catalyst added in the modified spent catalyst pellet Accounting for the mass percentage of the total sintering raw material is 0.59%; therefore, the mass percentage of each component of the dry material of the sintering mixture is: vanadium-titanium magnetite: 22.95%, card powder: 5.74%, Yangdi powder: 13.20%, PB powder : 8.61%, wool tower powder: 6.89%, return ore: 24.41%, limestone: 5.50%, dolomite: 2.05%, quicklime: 4.00%, ...

Embodiment 3

[0083]The basic process of the new method of utilizing the metallurgical process to recover valuable metal elements in spent catalysts in this example is the same as that in Example 1, except that the proportion of spent catalysts added in the modified spent catalyst pellets in this example accounts for the iron-containing raw materials The total mass percentage is 0.5%, the mass percentage of iron oxide scale is 1%, and the mass percentage of returned ore is 0.5%; when flux, fuel and returned ore are mixed into the sintering raw material, the amount of spent catalyst added in the modified spent catalyst pellet Accounting for the mass percentage of the total sintering raw material is 0.3%; therefore, the mass percentage of each component of the dry material of the sintering mixture is: vanadium-titanium magnetite: 23.25%, card powder: 5.81%, Yangdi powder: 13.37%, PB powder : 8.72%, wool tower powder: 6.97%, return ore: 24.70%, limestone: 5.50%, dolomite: 2.00%, quicklime: 4.00...

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Abstract

The invention discloses a waste catalyst recycling treatment method based on the iron ore sintering process, which belongs to the technical field of solid waste recovery; the invention mixes and roasts waste catalysts containing titanium oxide and solid materials containing iron oxides to produce A modified catalyst is obtained; the above-mentioned modified catalyst is added to the sintered material, and sintered together with the sintered material; the present invention mixes the waste catalyst with solid materials containing iron oxides such as solid waste iron scale produced by iron and steel plants , and roasted to form a modified waste catalyst mixture, which is then mixed with sintered ore return powder and pre-granulated before being sintered to produce qualified sintered ore containing V, W, and Ti elements, realizing volume reduction of waste catalyst , Harmless and resourceful treatment.

Description

technical field [0001] The invention relates to the technical field of recycling waste catalysts, and more specifically relates to a method for treating waste catalysts based on an iron ore sintering process. Background technique [0002] Nitrogen oxides (NOx) contained in industrial coal-fired flue gas are currently one of the main air pollutants, and the reduction of NOx emissions from industrial coal-fired flue gas has been pushed to the forefront. Currently NH 3 -SCR denitrification is widely used because of its high denitrification efficiency. NH 3 - One of the keys to SCR denitrification lies in the use of catalysts. The catalyst widely used in the market is V 2 o 5 -WO 3 / TiO 2 Catalyst; however, during the use of the catalyst, the catalyst is prone to deactivation, and the partially deactivated catalyst cannot be reused, so it must be disposed of, and the current policy requires strict disposal of this waste SCR catalyst; how to achieve The harmless and effici...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/248C22B1/16
CPCC22B1/248C22B1/16
Inventor 钱立新龙红明丁龙杨涛章裕东汪名赫罗云飞王毅璠余正伟孟庆民春铁军丁成义雷杰
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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