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Solid waste red mud microfibers and production method thereof

A technology of ultrafine fiber and red mud, which is applied in the field of manufacturing ultrafine fiber, can solve the problems of high cost, polluted water sources, and inability to obtain valuable applications, and achieve the effect of saving natural resources and low cost

Inactive Publication Date: 2009-09-02
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because red mud contains strong alkaline components, it is different from the usual slag, basalt, fly ash, etc., so it cannot be directly applied to brick making, cement, and road paving, and the useful elements or components are extracted due to high corrosiveness. costly
Therefore, in addition to piling up red mud, occupying land and polluting water sources, it has not been able to obtain valuable applications so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 100 parts of red mud from Jiaozuo (by weight, the same as described below), add 120 parts of 3.6% (weight content, the same as described below) hydrochloric acid aqueous solution, 10 parts of 3% formic acid aqueous solution, stir for 10 minutes, precipitate, remove Water content in the surface layer: add 20 parts of wollastonite powder, 3 parts of talc powder, and 1 part of titanium dioxide. Minutes, feeding, the melt falls to the two rows of 4-rollers that are rotating at high speed and is thrown into fibers; at the place where the fibers are conveyed by the crawler belt at a distance of 5 meters from the rollers, spray the fibers with 1000 parts of 0.1% acetic acid aqueous solution, and then spray the fibers at a distance of 5 meters. Spray 80 parts of polyvinyl acetate latex with a solid content of 5% at 8 meters of the roller machine; collect fibers.

[0031] The average diameter of the measured fiber is 4 μm, and the length is 8-13 cm. The surface pH value of ...

Embodiment 2

[0034] Take 100 parts of red mud from Jiaozuo (by weight, the same as described below), add 100 parts of 4% (weight content, the same as described below) phosphoric acid aqueous solution, 10 parts of 3% acetic acid aqueous solution, stir for 10 minutes, precipitate, remove Moisture content of the surface layer: add 15 parts of quartz sand, 2 parts of sepiolite powder, and 2 parts of Lide. After mixing evenly, it is evenly and continuously input into the tubular melting furnace through the metering device. After the temperature reaches 1250 ° C, keep it for 10 minutes , unloading, the melt falls to the two rows of 4-roller machines that are rotating at high speed and is thrown into fibers; at the place where the fibers are conveyed by the crawler at a distance of 5 meters from the roller machines, spray the fibers with 1000 parts of 0.1% hydrochloric acid aqueous solution, and then spray the fibers at a distance of 5 meters from the rollers. Spray 80 parts of polyacrylic acid em...

Embodiment 3

[0038] Get 100 parts of red mud from Jiaozuo (by weight, the same as described below), add 80 parts of 3% (weight content, the same as described below) perchloric acid aqueous solution, and 30 parts of 3% oxalic acid aqueous solution, and stir for 10 minutes. Precipitate and remove surface water; add 25 parts of bentonite, 5 parts of attapulgite, and 3 parts of barite powder. After mixing evenly, it is evenly and continuously input into the tubular melting furnace through the metering device. After the temperature reaches 1350°C , maintained for 10 minutes, unloading, and the melt fell to two rows of 4-roller machines rotating at high speed to be thrown into fibers; at the place where the fibers were conveyed by the crawlers at a distance of 5 meters from the roller machines, spray the fibers with 1000 parts of 0.1% phosphoric acid aqueous solution, Then spray 80 parts of styrene-butadiene latex with a solid content of 5% at a distance of 8 meters from the roller machine; colle...

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Abstract

The invention relates to a technical method for producing microfibers by using industrial waste red mud, which comprises the following steps: adding a reactant in the industrial waste red mud to carry out a neutralization reaction; then adding a preparation agent, a glidant and a whitening agent and stirring the agents; after being stirred, feeding materials in a tube-type high-temperature melting furnace continuously; releasing the materials after melting; outputting fused masses continuously to pass through a high-speed roller to carry out centrifugal rejection wire; and splashing a cooling agent and a surface coating agent to produce the red mud microfibers. The production method is suitable for industrial production. The technical method endows the solid waste red mud with the functionality of the microfibers. The technical method can implement various applications, such as pulp production, the preparation of sound and heat insulating materials and energy-saving walling materials, the production of the indoor suspended ceiling of light fire-retardant construction and industrial filtering materials, and the like, and has significant economic value and social meaning.

Description

technical field [0001] The invention relates to a method for producing superfine fiber by using solid waste, in particular to a process for preparing superfine fiber by using high-alkaline waste red mud. Background technique [0002] Inorganic solid residues, waste and construction waste in the industrial production process in my country are collectively referred to as inorganic solid waste, and the annual discharge amount reaches as much as 100 million tons. For example, the solid waste called red mud comes from a large amount of light red residue left after the production of aluminum powder or aluminum hydroxide with high content of aluminum minerals as raw materials. It is strongly alkaline and has a pH value of 13-14. Wherein the content of alkaline mixture represented by caustic soda (NaOH) is higher than 10%. Typical measured values ​​of red mud elements are: oxygen (O) 36.6%, sodium (Na) 9.1%, iron (Fe) 9.3%, calcium (Ca) 11.9%, aluminum (Al) 16.1%, silicon (Si) 11.7...

Claims

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Application Information

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IPC IPC(8): C03B37/04B09B3/00
Inventor 陈建定王彦华
Owner EAST CHINA UNIV OF SCI & TECH
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