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Magnetic fly ash ceramsite and preparation method thereof

A technology of fly ash ceramsite and fly ash, which is applied in the direction of ceramic products, chemical instruments and methods, clay products, etc., can solve the problems of magnetic coating breaking and falling off, complicated manufacturing process, etc., and achieve easy operation and simple preparation process , low-cost effect

Inactive Publication Date: 2015-01-07
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main disadvantage of this method is that the production process is complicated, and the collision of ceramsite during the application process will cause the magnetic coating on the surface to break and fall off.

Method used

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  • Magnetic fly ash ceramsite and preparation method thereof
  • Magnetic fly ash ceramsite and preparation method thereof
  • Magnetic fly ash ceramsite and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method of magnetic fly ash ceramsite, comprising the steps of:

[0024] Step 1, the carbon powder passed through a 100 mesh sieve, the fly ash and clay passed through a 180 mesh sieve respectively, and the magnetic iron oxide powder passed through a 300 mesh sieve are mass ratio 15:65:27:8 (carbon powder: powder Coal ash: clay powder: magnetic iron oxide powder) is mixed, and the mixed material is obtained after mixing; wherein, the fly ash contains 4% Fe 2 o 3 ;

[0025] Step 2, adding the mixed material of step 1 and the baking soda solution (the mass percent is 5% baking soda solution) of the mixed material with a quality of 23% of the mixed material together in a disc granulator for granulation to make spherical particles of 8mm;

[0026] Step 3, after the spherical particles are dried, calcined and cooled to obtain fly ash ceramsite; wherein, the calcining method is: at 0-100°C, the heating rate is 10°C / min, when the temperature reaches 100°C, keep ...

Embodiment 2

[0032] A preparation method of magnetic fly ash ceramsite, comprising the steps of:

[0033] Step 1, mix the carbon powder passed through a 100 mesh sieve, the fly ash and clay passed through a 180 mesh sieve respectively, and the magnetic iron oxide powder passed through a 300 mesh sieve at a mass ratio of 25:80:40:15, mix After uniformity, the mixed material is obtained;

[0034] Step 2, adding the mixed material of step 1 and the baking soda solution (the mass percent is 3% baking soda solution) of the mixed material with a quality of 30% of the mixed material in a disc granulator for granulation to make spherical particles of 20 mm;

[0035] Step 3, after the spherical particles are dried, calcined and cooled to obtain fly ash ceramsite; wherein, the calcining method is: at 0-100°C, the heating rate is 20°C / min, when the temperature reaches 100°C, keep the temperature constant for 30min, At 100-550°C, the heating rate is 15°C / min. When the temperature reaches 550°C, keep ...

Embodiment 3

[0041] A preparation method of magnetic fly ash ceramsite, comprising the steps of:

[0042] Step 1, mix the carbon powder passed through a 100 mesh sieve, the fly ash and clay passed through a 180 mesh sieve respectively, and the magnetic iron oxide powder passed through a 300 mesh sieve at a mass ratio of 30:70:30:2, mix After uniformity, the mixed material is obtained;

[0043] Step 2, adding the mixed material of step 1 and a 15% baking soda solution (mass percentage is 1% baking soda solution) of the mixed material together in a disc granulator for granulation to make spherical particles of 5 mm;

[0044] Step 3, after the spherical particles are dried, calcined and cooled to obtain fly ash ceramsite; wherein, the calcining method is: at 0-100°C, the heating rate is 15°C / min, when the temperature reaches 100°C, keep the temperature constant for 20min, At 100-550°C, the heating rate is 30°C / min. When the temperature reaches 550°C, keep the temperature constant for 50 minu...

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Abstract

The invention discloses a magnetic fly ash ceramsite and a preparation method thereof. The ceramsite is prepared by mixing and melting a certain amount of mixture and a sodium bicarbonate solution accounting for 15-30% of the weight of the mixture; wherein the mixture is prepared by mixing the following components such as fly ash, clay powder, carbon powder, and magnetic ferric oxide powder according to a mass ratio of (65-80):(15-40):(15-30):(2-15). The main raw material of the magnetic fly ash ceramsite is fly ash, which is very cheap. Moreover, the pollution caused by the fly ash can be solved at the same time, the waste is converted into valuable source, and the waste is used to treat wastes. The provided magnetic fly ash ceramsite has the advantages of corrosion resistance, high strength, rough surface, and fast membrane forming, and is capable of prominently improving the treatment effect on wastewater (namely the bio-degradation effect is improved).

Description

technical field [0001] The invention relates to a magnetic fly ash ceramsite which can be applied to sewage treatment, and also relates to a preparation method of the magnetic fly ash ceramsite. Background technique [0002] my country is a large coal-producing country, and coal is used as the basic fuel for electric power production. In recent years, my country's energy industry has developed steadily, with an annual growth rate of 7.3% in power generation capacity. The rapid development of the power industry has brought about a sharp increase in fly ash emissions. The total amount of fly ash emitted by coal-fired thermal power plants is year by year. It is estimated that the annual output of fly ash will reach 570 million tons by the end of the "Twelfth Five-Year Plan". In addition, my country is a country with limited resource reserves per capita. The comprehensive utilization of fly ash can turn waste into treasure and harm into It has become an important technical and ec...

Claims

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Application Information

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IPC IPC(8): C02F3/10
CPCC04B33/135C04B38/06Y02W10/10
Inventor 冯骞薛朝霞蒋亚东王萧肖玉冰方芳吴杨芳操家顺
Owner HOHAI UNIV
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