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Iron oxide/active carbon composite material and preparation method thereof

A technology of iron oxides and composite materials, applied in the field of comprehensive utilization of resources, can solve the problems of difficult solid-liquid separation, small specific surface area, affecting large-scale use, etc., and achieve the effects of simple process, easy recovery and low cost

Inactive Publication Date: 2019-02-12
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon is a commonly used adsorbent for water treatment. It has a huge specific surface area, developed pore structure, and strong adsorption performance, but it has the disadvantage of difficult solid-liquid separation.
Iron oxide is also a better adsorbent, it can adsorb metal ions, organic compounds, etc. in water, and it is easy to separate and recycle, but it affects large-scale use due to its small specific surface area

Method used

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  • Iron oxide/active carbon composite material and preparation method thereof
  • Iron oxide/active carbon composite material and preparation method thereof
  • Iron oxide/active carbon composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] refer to figure 1 , the preparation method of iron oxide / activated carbon composite material of the present invention, comprises the steps:

[0029] Step 1, raw material preparation: take a certain amount of small particle semi-coke, wash it with water for 2-4 times, dry it in a vacuum drying oven for 6-8 hours, put the dried small particle semi-coke into a pulverizer, and pass it through a 200-mesh sieve , to obtain semi-coke powder with the desired particle size; dry the residue of direct coal liquefaction and crush it through a 120-mesh sieve to obtain the powder of direct coal liquefaction residue with the desired particle size for use; prepare a polyvinyl alcohol solution with a solute mass percentage of 2% to 8% Standby; weigh the raw material dry material according to the different proportions of raw materials required, the raw material, in terms of mass percentage, contains 5% to 20% ferric oxide powder, 20% to 40% coal direct liquefaction residue powder, 40% ~...

Embodiment 1

[0035] The preparation method of the iron oxide / activated carbon composite material of the present embodiment comprises the following steps:

[0036] Step 1, raw material preparation: take a certain amount of small particle semi-coke, wash it twice, dry it in a vacuum drying oven for 6 hours, put the dried small particle semi-coke into a pulverizer, and pass it through a 200-mesh sieve to obtain the required particle size The semi-coke powder; the coal direct liquefaction residue is dried and crushed through a 120-mesh sieve to obtain the required particle size coal direct liquefaction residue powder, and a polyvinyl alcohol solution with a solute mass percentage of 2% is prepared for use; raw materials of different proportions are weighed according to the required Quantitative raw material dry material, the raw material, by mass percentage, contains 5% ferric oxide powder, 30% coal direct liquefaction residue powder, 65% semi-coke powder;

[0037] Step 2, mix the above-mentio...

Embodiment 2

[0043] The preparation method of the iron oxide / activated carbon composite material of the present embodiment comprises the following steps:

[0044] Step 1, raw material preparation: take a certain amount of small particle semi-coke, wash it 3 times, dry it in a vacuum drying oven for 7 hours, put the dried small particle semi-coke into a pulverizer, and pass it through a 200-mesh sieve to obtain the required particle size The semi-coke powder; the coal direct liquefaction residue is dried and crushed through a 120-mesh sieve to obtain the coal direct liquefaction residue powder with the required particle size; a polyvinyl alcohol solution with a solute mass percentage of 4% is prepared for use; different proportions of raw materials are required Weigh the raw material dry material, in the raw material, by mass percentage, it contains 10% ferric oxide powder, 30% coal direct liquefaction residue powder, and 60% semi-coke powder;

[0045] Step 2, mix the above-mentioned dry ma...

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Abstract

The invention belongs to the technical field of resource comprehensive utilization, and relates to an iron oxide / active carbon composite material and a preparation method thereof. Iron oxide powder, coal direct liquefaction residue powder and semi-coke powder are mixed to obtain a mixture A. Through being metered in percentage by mass, the mixture A is prepared from 5 to 20 percent of iron oxide powder, 20 to 40 percent of coal direct liquefaction residue powder and 40 to 65 percent of semi-coke powder; a polyvinyl alcohol solution with the solute mass being 2 to 8 mass percent is added into the mixture A; kneading and granulation are sequentially performed to obtain green balls; the green balls are dried; the dried green balls are pretreated for 2 to 4 h at the temperature of 150 to 300 DEG C under protection atmosphere or vacuum condition; the pretreated green balls are carbonized to obtain carbonization balls under the protection atmosphere or the vacuum condition; under the protection atmosphere, the carbonization balls are subjected to activation treatment; after the activation treatment, the iron oxide / active carbon composite material is obtained. The material has the advantages that the process is simple; the cost is low; a novel development and application path is opened for the small-particle semi-coke high-value-added application.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of resources, and relates to an iron oxide / activated carbon composite material and a preparation method thereof. Background technique [0002] The Jurassic coal resource reserves in the border areas of Shanxi, Shaanxi and Mongolia in my country are large, and the coal quality is very good, low in ash, low in sulfur, low in phosphorus, high in calorific value, high in fixed carbon, and high in reactivity. Because these coals have no caking or very poor caking, they cannot be used to produce metallurgical coke. Generally, they are made into semi-coke (also called semi-coke) by dry distillation and pyrolysis under medium and low temperature conditions. In the production process of semi-coke, about 10% of the semi-coke particles with a particle size of less than 3mm will be produced during crushing, transshipment, loading and unloading, and use. Due to the small particle size, they c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28C02F1/28C02F101/20
CPCB01J20/06B01J20/20C02F1/281C02F1/283B01J20/28009B01J20/28019C02F2101/20B01J2220/42
Inventor 田宇红呼书迪宋永辉张秋利周军兰新哲李林波吴雷
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY