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Method for preparing composite magnetic adsorption material

An adsorption material and composite magnetic technology, which is applied in the field of resource utilization of solid waste, can solve the problems of physical and mental health and daily travel impact, immature technology, air pollution, etc., achieve low secondary utilization cost, and increase the addition of slime value, the effect of easy recycling

Inactive Publication Date: 2015-07-01
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Because the comprehensive development and utilization technology of straw is not mature enough, the investment is large, and the utilization rate is low, a large amount of straw is burned by people every year.
This treatment method not only wastes resources, but also aggravates smog, pollutes the atmosphere, and seriously affects people's physical and mental health and daily travel.

Method used

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  • Method for preparing composite magnetic adsorption material
  • Method for preparing composite magnetic adsorption material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Coal slime, straw and magnetite are dried in a blast drying oven at 75°C, crushed by a crusher, and screened. The pretreated coal slime, straw powder and magnetite are uniformly mixed at a mass ratio of 1.5:1:0.05, and ground to 120um. The mixed material is placed in an atmosphere sintering furnace for carbonization treatment, the specific conditions are a nitrogen atmosphere, the calcination temperature is 850° C., and the calcination time is 1 h. That is to obtain a new type of composite magnetic adsorption material. Preparation routes such as figure 1 shown.

[0016] The microscopic appearance of the composite magnetic adsorption material prepared by the embodiment of the present invention is as follows: figure 2 shown. The composite magnetic adsorption material has a large number of micropores, and its well-developed pore structure can fully contact the adsorbed substance, providing a good structural basis for the adsorption performance.

[0017] The product p...

Embodiment 2

[0020] Coal slime, straw and magnetite are dried in a blast drying oven at 70°C, crushed by a crusher, and screened. The pretreated coal slime, straw powder and magnetite are uniformly mixed at a mass ratio of 0.5:1:0.1, and ground to 150um. The mixed material is placed in an atmosphere sintering furnace for carbonization treatment, the specific conditions are a nitrogen atmosphere, the calcination temperature is 750°C, and the calcination time is 1.5h. That is to obtain a new type of composite magnetic adsorption material.

[0021] The absorbance of the composite adsorption material prepared in this example is 2.688 before being used to treat the methylene blue solution, and the absorbance of the methylene blue solution after being treated is 0.10. The magnetic performance test of the product prepared in this embodiment shows good magnetic properties.

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Abstract

The invention belongs to a method for preparing a composite magnetic adsorption material and in particular relates to a method for preparing the composite magnetic adsorption material aiming at coal slime, straws and magnetic iron ore powder. The method comprises the following steps: respectively drying, crushing and screening the coal slime, straws and magnetic iron ore powder, uniformly mixing the coal slime, straws and magnetic iron ore powder according to a certain mass ratio, and grinding the mixture to be with proper granularity; performing carbonizing treatment on the mixed materials in an atmosphere sintering furnace, thereby obtaining the composite magnetic adsorption material with the developed pore structure and magnetism. According to the magnetic adsorption material, the used raw materials are low in price, the production process is simple, the used product is easy to recycle, the secondary utilization cost is low, and the material has potential application prospect.

Description

technical field [0001] The invention belongs to the field of resource utilization of solid waste, and in particular relates to a method for preparing a composite magnetic adsorption material from coal slime, straw and magnetite. Background technique [0002] At present, my country's coal industry is suffering from cold weather, and it is difficult to sell coal slime. Slime has a low calorific value and poor quality, making industrial applications more limited. Therefore, it is of great significance to improve the efficient utilization of coal slime and broaden the application field to increase the added value. [0003] The annual output of crop straw in my country is hundreds of millions of tons. Due to the immature technology of comprehensive development and utilization of straw, large investment and low utilization rate, a large amount of straw is burned by people every year. This treatment method not only wastes resources, but also increases smog and pollutes the atmos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30
Inventor 章龙胜王艳芬类晓明袁江峰程详
Owner ANHUI UNIV OF SCI & TECH