Processing technology for white carbon black with low water content

A technology of moisture content and processing technology, applied in the chemical industry, can solve the problems of damaging the processing performance of finished products, high moisture content of finished products, poor drying effect, etc., achieve uniform particle size distribution of finished products, short reaction cycle, and shorten combustion time Effect

Active Publication Date: 2014-05-21
QUECHEN SILICON CHEM
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0006] The drying process is closely related to the moisture content of the finished silica, but the traditional drying process not only consumes a lot of energy, but also has poor drying effects, insufficient drying, and high moisture content in the finished product; excessive drying may even damage the processing performance of the finished product

Method used

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  • Processing technology for white carbon black with low water content

Examples

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Effect test

Embodiment 1

[0039] The processing technology of silica with low moisture content, the specific process steps are as follows:

[0040] A, the preparation of rice husk ash:

[0041] After removing impurities from the rice husk, add 11 times the mass fraction of the rice husk and soak in hydrochloric acid with a mass fraction of 3.5% for 2.5 hours, then wash with water to remove acid, spray dry the washed rice husk, and put the dried rice husk in a muffle furnace Combustion at 530°C for 1.4h, then send the combustion products into the suspension combustion furnace, and burn at 580°C for 45min to obtain rice husk ash for later use;

[0042] B, the preparation of water glass:

[0043] Mix rice husk ash and NaOH solution with a mass fraction of 45% in an autoclave at a mass ratio of 1:5. The agitator and steam pipe are respectively passed into the autoclave. Steam holes are evenly distributed on the steam pipe, and the stirring speed is controlled at 240r / min, the steam temperature is 190°C, t...

Embodiment 2

[0055] The processing technology of silica with low moisture content, the specific process steps are as follows:

[0056] A, the preparation of rice husk ash:

[0057] After removing impurities from the rice husk, add 9 times the weight of the rice husk and soak in 3% hydrochloric acid for 2 hours, then wash with water to remove the acid, spray dry the washed rice husk, and place the dried rice husk in a muffle furnace Combustion at 500°C for 1 hour, then send the combustion product into the suspension combustion furnace, and burn at 550°C for 30 minutes to obtain rice husk ash for later use;

[0058] B, the preparation of water glass:

[0059] Mix rice husk ash and NaOH solution with a mass fraction of 40% in the autoclave at a mass ratio of 1:4. The stirrer and steam pipe are respectively passed into the autoclave. Steam holes are evenly distributed on the steam pipe, and the stirring speed is controlled at 200r / min, steam temperature 170°C, pressure inside the kettle 0.6...

Embodiment 3

[0071] The processing technology of silica with low moisture content, the specific process steps are as follows:

[0072] A, the preparation of rice husk ash:

[0073] After removing impurities from the rice husks, add 12 times the weight of the rice husks and soak in 4% hydrochloric acid for 3 hours, then wash with water to remove the acid, spray dry the washed rice husks, and place the dried rice husks in a muffle furnace Combustion at 550°C for 2 hours, then send the combustion products into the suspension combustion furnace, and burn at 650°C for 60 minutes to obtain rice husk ash for later use;

[0074] B, the preparation of water glass:

[0075] Rice husk ash and NaOH solution with a mass fraction of 55% were mixed in an autoclave at a mass ratio of 1:6, the stirrer and steam pipe were respectively passed into the autoclave, steam holes were evenly distributed on the steam pipe, and the stirring speed was controlled at 300r / min, steam temperature 220°C, pressure insid...

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Abstract

The invention discloses a processing technology for white carbon black with the low water content. The processing technology provided by the invention has the advantages that rice hull ash is utilized as a raw material, soluble glass is obtained through the rice hull ash subjected to alkali lye treatment, and a white carbon black finished product is obtained through acidification sedimentation and three-section drying. The processing technology provided by the invention has the advantages that the technology steps are rigorous, technology parameters are definite, the white carbon black is subjected to three-section drying treatment, the content of water of the white carbon black is low, the particle size distribution is uniform, particles are small, energy is recycled, and the white carbon black processing technology is environmentally-friendly and efficient.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a white carbon black processing technology with low water content. Background technique [0002] Rice husk is the main by-product of rice processing, accounting for about 20% of the weight of rice. At present, the annual output of rice husk in the world is more than 40 million tons. Rice husk ash is the product of rice husk burning. If it is not used, it will not only cause waste, It also pollutes the environment; the main component of rice husk ash is silicon dioxide, accounting for about 85% to 90%, and there are few other mineral impurities. It is an ideal raw material for the production of fine chemical products, white carbon black. [0003] White carbon black is an important chemical product, also known as hydrated silica, chemical formula SiO 2 .nH 2 O, is a silicate series reinforcing material, because of its reinforcing and dispersing properties, it is widely used in sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/12
Inventor 宣全
Owner QUECHEN SILICON CHEM
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