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Carbon-iron-titanium-silicon-aluminum oxide compound and preparation method and application thereof

A silicon-aluminum oxide and composite technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, separation methods, etc. Problems such as high carbon yield and large iron particle size have achieved the effects of wide industrial application prospects, high-value utilization, and high activated carbon yield

Active Publication Date: 2016-07-06
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the above-mentioned inventions, the dealkalization or other treatment processes of alkaline compounds in the red mud did not make good use of the iron oxide therein
And using red mud directly as a carbon fiber catalyst, because the raw material contains a large amount of alkaline substances and chlorine elements, and the iron particle size is large, it is difficult to have high activity and high carbon yield for carbon fiber preparation, so it does not have industrial application prospects
Combining the pollution of red mud and the current situation of comprehensive utilization, it is not difficult to find that there is no feasible technology at this stage to realize the high-value utilization methods and approaches of iron in red mud, and the high-value and large-scale application of red mud

Method used

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Examples

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Effect test

Embodiment 1

[0048] A preparation method of an iron-titanium-silicon-aluminum oxide compound for depositing carbon fibers, comprising the steps of:

[0049] (1) After adding 1 kg of water to 1 kg of red mud, put it into a ball mill tank and mill it for 12 hours, so that the particle size is less than or equal to 100 nm, and obtain the first slurry, the solid content of the first slurry is 30%;

[0050] (2) After 1 kg of dilute nitric acid solution (10% concentration) was added dropwise in the first slurry, the pH value of the solution was about 2, and the system became slurry; the slurry red mud was added dropwise with ammonia water (10% concentration) during the ball milling process. Concentration) 0.5kg, the pH value of the solution is about 6, the silica-alumina sol precipitates again, the viscosity of the system becomes smaller, and the second slurry is obtained;

[0051] (3) After the second slurry is subjected to solid-liquid separation and washing, it is dried at 120°C, and then roa...

Embodiment 2

[0059] A preparation method of an iron-titanium-silicon-aluminum oxide compound for depositing carbon fibers, comprising the steps of:

[0060] (1) After adding 2 kg of water to 1 kg of red mud, put it into a ball mill tank and mill it for 10 hours, so that the particle size is less than or equal to 100 nm, to obtain the first slurry, the solid content of the first slurry is 20%;

[0061] (2) After dripping dilute hydrochloric acid solution (5%) 1kg successively in the first slurry, the solution pH value is about 4, and the system becomes slurry; Slurry red mud is dripped successively sodium hydroxide (10% in ball milling process) % concentration) after 0.5kg, the pH value of the solution is about 6, the silica-alumina sol precipitates again, the viscosity of the system becomes smaller, and the second slurry is obtained;

[0062] (3) After the second slurry is subjected to solid-liquid separation and washing, it is dried at 100° C., and then roasted at 600° C. for 5 hours to o...

Embodiment 3

[0070] A preparation method of an iron-titanium-silicon-aluminum oxide compound for depositing carbon fibers, comprising the steps of:

[0071] (1) After adding 1 kg of water to 1 kg of red mud, add it to a ball mill tank and mill for 24 hours, so that the particle size is less than or equal to 100 nm, and obtain the first slurry, the solid content of the first slurry is 50%;

[0072] (2) After dripping sulfuric acid solution (50%) 0.2kg successively in the first slurry, the pH value of the solution is about 3, and the system becomes slurry; slurry red mud is dripped with sodium carbonate aqueous solution (5 % concentration) after 1kg, the pH value of the solution was about 7, the silica-alumina sol precipitated again, the viscosity of the system became smaller, and the second slurry was obtained;

[0073] (3) After the second slurry is subjected to solid-liquid separation and washing, it is dried at 100°C, and then calcined at 800°C for 3 hours to obtain a solid substance, th...

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Abstract

The invention provides a carbon-iron-titanium-silicon-aluminum oxide compound and a preparation method and application thereof. The preparation method of the carbon-iron-titanium-silicon-aluminum oxide compound comprises the following steps that water is added into red mud, and a first slurry is obtained through grinding; acid is added into the first slurry to adjust the pH value to be 2 to 4, surface dispersant is added, alkaline matter is added to adjust the pH value to be 5 to 10 during the grinding process, and a second slurry is obtained; solid-liquid separation is conducted on the second slurry, calcination is conducted on a solid, and a coated iron-titanium-silicon-aluminum oxide is obtained; reduction is conducted on the coated iron-titanium-silicon-aluminum oxide in a reducing gas atmosphere, carbon fiber generation is conducted in a hydrocarbon atmosphere, cooling is conducted, and the carbon-iron-titanium-silicon-aluminum oxide compound is obtained. According to the carbon-iron-titanium-silicon-aluminum oxide compound and the preparation method and application thereof, high-value utilization of the red mud can be achieved, and extremely high industrial application potential is achieved.

Description

technical field [0001] The invention belongs to the field of hazardous solid waste treatment and application, and relates to a carbon-iron-titanium-silicon-aluminum oxide compound and its preparation method and application. Background technique [0002] Red mud is the polluting strong alkaline waste slag discharged when the aluminum industry extracts alumina. Generally, for every ton of alumina produced, 1.0 to 2.0 tons of red mud are incidentally produced. A large amount of red mud cannot be fully and effectively utilized, and can only be stacked in a large area of ​​storage yard, which occupies a large amount of land and causes serious pollution to the environment. Most countries have listed red mud as a hazardous waste. The production of red mud has caused direct and indirect impacts on human production and life in many ways. Therefore, the output and hazards of red mud should be minimized to achieve multi-channel, Large quantities of resources are imminent. [0003] Be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C02F1/28B01D53/02B01J23/745C02F101/16C02F101/34
CPCB01D53/02B01J20/0211B01J20/0229B01J20/08B01J20/103B01J20/20C02F1/281B01J23/745C02F2101/345C02F2101/16B01D2253/1124B01D2253/102B01D2253/10B01D2253/106B01D2253/104B01D2257/60B01D2257/602B01D2258/0283B01J2220/4887B01J2220/42B01J35/23
Inventor 余剑李长明郭凤崔彦斌
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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