Method and device for fast preparing white activated rice hull ash

A technology of rice husk gray and white, applied to the removal of solid waste, silicon dioxide, silicon oxide, etc., can solve the problem that the quality cannot reach high-performance concrete, and avoid excessive heat dissipation, white color, and loss little effect

Inactive Publication Date: 2012-10-17
FUZHOU UNIV
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Problems solved by technology

At present, the production of rice husk ash needs to be incinerated for several days. Although the output can be large, the quality is far from meeting the requirements for high-performance concrete

Method used

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  • Method and device for fast preparing white activated rice hull ash
  • Method and device for fast preparing white activated rice hull ash
  • Method and device for fast preparing white activated rice hull ash

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Embodiment Construction

[0034] In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings, but the present invention is not limited thereto.

[0035] The method for rapidly manufacturing white active rice husk ash of the present invention, the method is carried out as follows:

[0036] (1) Carry out dilute acid pretreatment (hydrochloric acid, nitric acid) to the rice husk, the mass ratio of water to acid of the pretreatment liquid is 5~15:1, and the pretreatment time is 2~24 hours;

[0037] (2) The rice husk after dilute acid pretreatment needs to be washed with clean water for several times, generally 2 to 3 times, and the impurities in the rice husk are removed;

[0038] (3) Put the cleaned rice husk directly into the incineration basket, and place it in a pre-set 600°C furnace for incineration. Before putting the rice husk into the furnace, open th...

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Abstract

The invention relates to method and device for fast preparing white activated rice hull ash. The method comprises the following steps: (1) carrying out diluted acid pretreatment on rich hulls for 2-24 hours; (2) washing the rice hulls subjected to diluted acid pretreatment for many times, and removing impurities in the rice hulls; and (3) directly placing the washes rice hulls into an incineration basket, and incinerating in a furnace body, controlling the grate temperature of the furnace body at the temperature of 600-800 DEG C, and preparing rice hull ash with 50 nanoscale particles, wherein the content of amorphous silica achieves more than 90%, the amorphous silica is white and evenly distributed, and the rich hull ash is loosely stacked. The device comprises an insulating furnace body, the incineration basket, a temperature controller, a thermocouple temperature sensor, a resistance wire, an adjustable air inlet and an adjustable air outlet. The method and the device can be used for fast producing white activated rice hull ash capable of substituting silica fume.

Description

technical field [0001] The invention relates to a method and a device for rapidly producing white activated rice husk ash. The device can provide a stable combustion environment and rapidly produce white activated rice husk ash. Background technique [0002] Recycling industrial waste and agricultural by-products not only helps to save resources and protect the environment, but also is a research hotspot in the current resource crisis. my country is a large agricultural country with an annual output of more than 40 million tons of rice husk, and the potential resource of rice husk ash is very large. Therefore, rice husk ash (RHA) has great economic value as a mineral admixture in high performance concrete (HPC). [0003] The rice husk is mainly composed of glumes, glumes, glumes, and cobs. There are mane-like awns on the top of the glumes. The rice husk is in the shape of a thin shell with a thickness of less than 0.5mm. The length and width can be divided into round grain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12B09B3/00
Inventor 庄一舟郑海彬
Owner FUZHOU UNIV
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