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Method for preparing manganese-base low-temperature denitration catalyst by utilizing gold copper tailings

A gold-copper tailings and low-temperature denitrification technology, which is applied in the fields of waste resource utilization and industrial waste gas treatment, can solve problems such as difficult treatment of gold-copper tailings, achieve significant economic and social benefits, increase added value, and reduce artificial additions volume effect

Inactive Publication Date: 2015-04-08
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a method for preparing a manganese-based low-temperature denitrification catalyst using gold-copper tailings, which is used to solve the difficult problem of gold-copper tailings, expand its application range, and promote the development of gold-copper tailings. Comprehensive utilization of resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Firstly, the gold and copper tailings were collected from the gold and copper tailings dump, and its composition is shown in Table 1. The gold and copper tailings were ground into fine powder with a mill, dried at 110°C, and passed through a 20-60 mesh sieve. 30g of gold-copper tailings fine powder is placed in a muffle furnace, calcined at 750°C for 3 hours, cooled and put into a drier for later use. Mix the nitric acid solution with a molar concentration of 0.90mol / L and the treated gold-copper tailings powder at a liquid-solid volume ratio of 3:1, calcinate at 600°C for 4 hours, take it out, cool to room temperature, and grind to 60 After -100 mesh, put it in a desiccator for later use. Weigh 4.0000g of processed gold-copper tailings powder on an electronic balance with an accuracy of 0.0001g, place it in a 400mL beaker, add 0.020mol of manganese acetate and 0.002mol of copper nitrate, and then add an appropriate amount of distilled water , making the volume of the ...

Embodiment 2

[0033] Firstly, the gold and copper tailings were collected from the gold and copper tailings dump, and its composition is shown in Table 1. The gold and copper tailings were ground into fine powder with a mill, dried at 110°C, and passed through a 20-60 mesh sieve. 30g of gold-copper tailings fine powder is placed in a muffle furnace, calcined at 600°C for 4 hours, cooled and placed in a dryer for later use. Mix the hydrochloric acid solution with a molar concentration of 0.08mol / L and the treated gold-copper tailings powder at a liquid-solid volume ratio of 5:1, calcinate at 500°C for 4 hours, take it out, cool to room temperature, and grind to 60 After -100 mesh, put it in a desiccator for later use. Weigh 4.0000g of processed gold-copper tailings powder on an electronic balance with an accuracy of 0.0001g, place it in a 400mL beaker, add 0.015mol of manganese nitrate and 0.004mol of nickel chloride, and then add an appropriate amount of Distilled water to bring the volume...

Embodiment 3

[0035] Firstly, the gold and copper tailings were collected from the gold and copper tailings dump, and its composition is shown in Table 1. The gold and copper tailings were ground into fine powder with a mill, dried at 110°C, and passed through a 20-60 mesh sieve. 30g of gold-copper tailings fine powder is placed in a muffle furnace, calcined at 800°C for 3 hours, cooled and placed in a drier for later use. Mix the nitric acid solution with a molar concentration of 0.20 mol / L and the treated gold-copper tailings powder at a liquid-solid volume ratio of 3:1, calcinate at 600°C for 3 hours, take it out, cool to room temperature, and grind to 60 After -100 mesh, put it in a desiccator for later use. Weigh 4.0000g of processed gold-copper tailings powder on an electronic balance with an accuracy of 0.0001g, place it in a 400mL beaker, add 0.025mol of manganese acetate and 0.009mol of copper sulfate, and then add an appropriate amount of distilled water , making the volume of th...

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Abstract

The invention relates to a method for preparing a manganese-base low-temperature denitration catalyst by utilizing gold copper tailings. The method comprises the following steps of: (1) grinding the gold copper tailings into fine powder, drying, and placing in a muffle furnace for roasting; (2) weighing gold copper tailings powder, placing in a beaker, adding copper salt or nickel salt after adding manganese salt, adding distilled water, and placing the mixture in a magnetic stirrer for stirring; and (3) placing the obtained sample in a drying box for drying, taking out for grinding, roasting, taking out for grinding after cooling, and placing in a dryer for the future use. The method for preparing manganese-base low-temperature denitration catalyst by utilizing gold copper tailings has the beneficial effects that firstly, the economical benefits and social benefits are remarkable; secondly, the gold copper tailings are used as materials for preparing the denitration catalyst, so that the content of nitric oxide in flue gas of a plant is lowered; thirdly, a catalyst with good thermal stability is obtained; fourthly, compared with the existing manganese-base denitration catalyst which uses titanium dioxide as a carrier, the manganese-base denitration catalyst which is synthesized by the method disclosed by the invention can be used for lowering the concentration of NOx in the gas by 60%-85%.

Description

technical field [0001] The invention relates to the fields of waste resource utilization and industrial waste gas treatment, and relates to a method for preparing a manganese-based low-temperature denitrification catalyst by using gold and copper tailings. Background technique [0002] Nitrogen oxides (NO x ) mainly comes from the combustion of fossil fuels, which can not only lead to the formation of acid rain, but also react with ozone to form photochemical smog. At present, photochemical smog has become an important air pollutant after inhalable particulate matter and sulfur dioxide. With the rapid development of my country's economy, the use of fossil fuels has greatly increased, which has largely increased the pollution of acidic substances such as sulfur dioxide and nitrogen oxides in the air. According to statistics, about 50% of the cities in my country have NO x The concentration exceeds the national second-level annual average daily value standard. The emergenc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889
Inventor 谢峻林方德何峰梅笛张文涛董盼盼陈俊孚付争兵
Owner WUHAN UNIV OF TECH