AU2021103146A4 - Coal Chemical Waste Residue-based Fiber and Preparation Method Thereof - Google Patents

Abstract

The embodiment of the invention provides a coal chemical waste residue-based fiber and a preparation method thereof, which relate to the technical field of comprehensive utilization of waste. The coal chemical waste residue-based fiber is prepared from the following preparation raw materials in parts by weight: 100 parts of coal chemical waste residues, 20-30 parts of fly ash, 3-5 parts of glass residues and 2-3 parts of iron residues, wherein the coal chemical waste residues comprise the following chemical elements in percentage by mass: 15%-20% of silicon and 10% 25% of aluminum. The preparation method of the coal chemical waste residue-based fiber includes the following steps: crushing and mixing the preparation raw materials, carrying out wiredrawing under a molten state, and carrying out surface modification treatment. According to the coal chemical waste residue-based fiber and the preparation method thereof, coal chemical waste residues, fly ash and other solid waste are used as the raw materials, so that the utilization rate of solid waste is high, and the prepared fiber product has excellent performance.

Description

Coal Chemical Waste Residue-based Fiber and Preparation Method

Thereof

TECHNICAL FIELD

The invention relates to the technical field of comprehensive utilization of

waste, in particular to a coal chemical waste residue-based fiber and a

preparation method thereof.

BACKGROUND

With the popularization and application of coal chemical technologies

such as coal gasification, kerosene treatment, and coal power generation, a

great number of coal chemical residues will be generated. For example, in the

coal-to-oil process, about 15000 tons of coal-to-oil waste residues will be

produced for every 10000 tons of oil. At present, the utilization rate of these

coal chemical waste residues is not high. Most of coal chemical waste

residues are stacked and landfilled, thereby polluting water source and air

while occupying a large amount of land, and putting greater pressure on

environmental protection.

In addition, fly ash is the main solid waste discharged from coal-fired

power plants, and its main components are Si2, A1203, FeO, Fe203, CaO,

MgO, etc. With the development of the power industry, the amount of fly ash

emissions from coal-fired power plants has increased year by year, and

therefore, the fly ash has become one of the largest solid wastes in China. At

present, the fly ash is mainly used as auxiliary materials for building materials,

producing hollow concrete bricks, concrete, etc., with a utilization rate less

than 1/3. The remaining parts are stacked in situ, occupying a large area of land and causing serious pollution to the environment.

SUMMARY

The objective of the examples of the invention is to provide a coal

chemical waste residue-based fiber and a preparation method thereof. The

coal chemical waste residues, fly ash and other solid wastes are used as raw

materials, so that the utilization rate of solid wastes is high, and fiber products

with excellent performance are obtained.

In a first aspect, the example of the invention provides a coal chemical

waste residue-based fiber which is prepared from the following preparation

raw materials in parts by weight: 100 parts of coal chemical waste residues,

-30 parts of fly ash, 3-5 parts of glass residues and 2-3 parts of iron

residues, where the coal chemical waste residues comprise the following

chemical elements in percentage by mass: 15%-20% of silicon and 10%-25%

of aluminum.

In the above technical solution, solid wastes such as coal chemical waste

residues, fly ash, glass residues, and iron residues are used as raw materials,

so that the utilization rate of solid waste is high, the economic value added of

solid waste is increased, and waste is changed into things of value. The

obtained fiber products are excellent in water resistance, slip resistance, wear

resistance, and oxidation resistance, and have good application prospects.

Specifically, coal chemical waste residues are rich in silica, alumina, and other

components, especially silicon content being 15% -20% and aluminum

content being 10% -25%; fly ash also contains silica, alumina, etc., which are

high in content and stable, with the mass content of silica being 40%-60%, and the mass content of alumina being 20%-30%; the glass residues contain sodium oxide and potassium oxide; the iron residues are rich in iron oxide and ferrous oxide. Silica and alumina serve as the core structure of a fiber silica aluminum skeleton, forming the structural network of the fiber, so that coal chemical waste residues and fly ash form fibers, especially continuous inorganic fibers to ensure the stability and mechanical properties of the fibers; sodium oxide and potassium oxide can improve the waterproof, anti-skid, wear-resistant properties of the fiber; and iron oxide and ferrous oxide can improve the high temperature resistance and oxidation resistance of the fiber.

In a possible implementation manner, the coal chemical waste residues

are selected from at least one of coal-to-liquid waste residues and coal

gasification residues.

In the above technical solution, the coal-to-oil waste residues and the

coal gasification residues are both wastes produced after chemical production

using coal as raw materials, which have large emissions and both contain

silica and alumina, and can be recycled to manufacture fibers.

In a possible implementation manner, the coal-to-oil waste residues

include the following components in percentage by mass: 35.3%-42.1% of

SiO2 , 21.4%--27.3% of A1203, 1.2% -7.2% of Fe2O3, 1.5% -6.4% of CaO and

0.6% -3.1% of MgO;

The coal gasification residues include the following components in

percentage by mass: 27.1% -35.8% of SiO 2 , 8.9% -18.5% of A1203, 8.1%

21.0% of Fe2O3, 8.1% -19.8% of CaO, 4.1% -5.1% of MgO, 1.1% -2.3% of

Na2O and 1.0% -1.4% of TiO2.

In the above technical solution, the components of coal-to-oil waste

residues and coal gasification residues both contain silica and alumina, with

content of silicon and aluminum being easily controlled within a specific range.

In a possible implementation manner, the coal chemical waste residues

include coal-to-oil waste residues and coal gasification residues in a weight

ratio of (20-30):(3-6).

In the above technical solution, coal-to-liquid waste residues and the coal

gasification residues are used to compose coal chemical waste residues in a

weight ratio of (20-30):(3-6), which can make full use of different coal-to-oil

waste residues and reduce the environmental pollution caused by coal-to-oil

residues.

In a possible implementation manner, the preparation raw materials

further include 5-10 parts by weight of electrolytic manganese residues.

In the above technical solution, the electrolytic manganese residues are

acid-pickling filter residues produced during the production of electrolytic

manganese, which are rich in manganese oxide. A specific quantity of

electrolytic manganese residues are added into the preparation raw materials,

increasing the utilization rate of electrolytic manganese residues, reducing the

pollution of the electrolytic manganese residues to land and water; and the

introduction of manganese oxide through electrolytic manganese residues

helps to improve the surface tension and high temperature stability of the

fiber, which is conducive to the formation of long fibers.

In a possible implementation, the diameters of the monofilament are 7-12

pm.

In the above technical solutions, the application fields of coal chemical

waste residue-based fibers are wide.

In a second aspect, the example of the invention provides a method for

preparing a coal chemical waste residue-based fiber provided in the first

aspect, which includes the following step: wiredrawing a mixture of the

preparation raw materials in a molten state to perform surface modification

treatment.

In the above technical solution, the existing solid waste coal chemical

waste residues, fly ash, glass residues and iron residues are used as raw

materials, which are crushed and mixed; and the specific components of the

solid waste are used in combination with the preparation process for blending,

modifying and melt wiredrawing to obtain fiber products with excellent

properties, so that the application prospect is good.

In a possible implementation manner, the step of wiredrawing the mixture

of preparation raw materials in a molten state includes:

melting the mixed preparation raw materials at 1400-1600 °C , and

introducing the preparation raw materials into wiredrawing equipment for

drawing;

or, melting the preparation raw materials after mixing at 1450-1600°C and

cooling the preparation raw materials to a temperature lower than 300°C to

prepare a mixture; melting the mixture at 1400-1600°C and introducing the

mixture into wiredrawing equipment for wiredrawing.

In the above technical solution, according to the specific preparation raw materials and proportions, a one-step method of direct melting and drawing, or a two-step method of melting and cooling and then melt wiredrawing can be used to produce continuous long fibers with excellent performance.

In a possible implementation manner, the surface modification treatment

step includes: using a wetting agent to perform surface modification treatment

on the fiber formed by wiredrawing, wherein the wetting agent is selected from

a group consisting one or two of modified epoxy resin, polyethylene emulsion

and polyvinyl acetate.

In the above technical solution, the wiredrawing is subjected to the

surface modification treatment of the wetting agent, which can significantly

enhance the strength and toughness of the fiber and ensure the subsequent

application requirements.

DESCRIPTION OF THE INVENTION

To make the objectives, technical solutions, and advantages of the

examples of the invention clearer, the technical solutions in the examples of

the invention will be clearly and completely described below. If the specific

conditions are not indicated in the examples, the conventional conditions or

the conditions recommended by the manufacturer are used. The reagents or

instruments used are not specified by the manufacturer, and they are all

conventional products that can be commercially available.

The coal chemical waste residue-based fiber and the preparation method

thereof in the examples of the invention will be specifically described below.

The example of the invention provides a coal chemical waste slag-based fiber which is prepared from the following raw materials in parts by weight:

100 parts of coal chemical residues, 20-30 parts of fly ash, 3-5 parts of glass

residues, and 2-3 parts of iron residues, where the coal chemical waste

residues include the following chemical components in percentage by mass:

% -20% of silicon, and 10% -25% of aluminum; generally, the coal chemical

waste residues include the following chemical elements in percentage by

mass: 3%-5% of calcium, 5%-10% of magnesium, 2% -8% of iron, 1% -3% of

sodium and 1% -2% of potassium. In some examples of the invention, the

preparation raw materials further include 5-10 parts by weight of electrolytic

manganese residues. Optionally, the preparation raw materials of the coal

chemical residue-based fiber include 100 parts by weight of coal chemical

residues, 20 parts by weight of, 22 parts by weight of, 25 parts by weight of,

27 parts by weight of, or 30 parts by weight of fly ash, 3 parts by weight of, 4

parts by weight of, or 5 parts by weight of glass residues, 2 parts by weight of,

2.5 parts by weight of or 3 parts by weight of iron residues, and 5 parts by

weight of, 6 parts by weight of, 7 parts by weight of, 8 parts by weight of or 10

parts by weight of electrolytic manganese residues.

In the above preparation raw materials, the coal chemical waste residues

are selected from at least one of coal-to-oil waste residues and coal

gasification residues. In some examples of the invention, the coal chemical

waste residues are a coal-to-oil waste residues or coal gasification residues;

in other examples of the application, the coal chemical waste residues are a

mixture of coal-to-oil waste residues and coal gasification residues, for

example, the coal chemical waste residues are coal-to-oil waste residues and

coal gasification residues in a weight ratio of (20-30): (3-6).

It should be noted that the coal-to-oil waste residues generally includes

the following components in percentage by mass: 35.3%-42.1% of SiO2,

21.4%-27.3% of A1203, 1.2%-7.2% of Fe2O3, 1.5%-6.4% of CaO, and 0.6%

3.1% of MgO; the coal gasification residues generally include the following

components in percentage by mass: 27.1% -35.8% of SiO2, 8.9%-18.5% of

A1203, 8.1%-21.0% of Fe2O3, 8.1%-19.8% of CaO, 4.1%-5.1% of MgO, 1.1%

2.3% of Na2O and 1.0 -1.4% of TiO2.

Fly ash is fine ash collected from the flue gas after coal combustion. The

mass content of silica in the fly ash is 40% -60%, the mass content of alumina

is 20% -30%, the mass content of alumina is 5%-10%, the mass content of

calcium oxide is 10%-15%, the mass content of magnesium oxide is 1%

1.5%, the mass content of potassium oxide is 2%-2.5%, the mass content of

sodium oxide is 1%-2%.

The iron residues generally include, in percentage by mass: 10% -12% of

CaO, 20% -30% of SiO2, 7% -8% of Fe304, 3% -7% of Fe2O3, 8% -10% of

MgO, and 1% -3% of FeO.

The electrolytic manganese residues generally include the following

components in percentage by mass: 23 -32% of SiO2, 12%-17% of CaO, 7%

% of A1203, 5% -6% of Fe2O3, 3%-5% of MnO, 2%-3% of MgO, 0.2% -0.8%

of Na2O and 0.5% -1.0% of TiO2.

Generally, the diameters of the monofilaments of the coal chemical waste

residue-based fiber of the example of the inventions are 7-12 pm, for

example, the diameters of the monofilaments are 7 pm, 8 pm, 9 pm, 10 pm,

11 pm, or 12 pm. The products can be applied to building decorative materials, fibered pulp, coating, fiberglass reinforced plastic, fiber sound insulation materials, fiber electromagnetic devices, fiber shockproof materials, etc.

The example of the invention further provides a preparation method for

the coal chemical waste residue-based fiber, including the following steps:

(1) crushing and mixing preparation raw materials, where the preparation

raw materials for preparation: coal chemical waste residues, fly ash, glass

residues and iron residues are specifically crushed and grinded to pass

through a 30-50-mesh sieve, and then are burdened and mixed uniformly in a

specific proportion to obtain a mixture, where the uniform mixing way can be

realized by a homogenizer; and the raw materials are further added into a

crushing and mixing homogenizer in the specific proportion to sufficiently mix

and homogenize raw material components.

In order to make the components of the preparation raw materials

controllable within a predetermined range, some preparation raw materials

need to be pretreated before the preparation raw materials are crushed,

especially an elemental ratio of coal chemical waste residues may be greatly

different from that of the fiber, so the reparation raw materials need to be pre

treated to remove the organic substances and optimize the proportion of the

elements, especially the content of important oxide components is within the

control range. For example, the pretreatment method of coal-to-liquid waste

residues is as follows: after preliminary drying treatment, the coal-to-oil waste

residues are crushed to a particle size of 15-25 mm by a crusher; and the

crushed sample is placed in a high-temperature melting furnace at 800-850°C to keep for 2-3 hours; and the sample is cooled to the room temperature for later use.

(2) introducing the mixture is a drawing test equipment kiln in a molten

state for wiredrawing to control the diameters of the fiber monofilaments to be

7-12 pm, where generally, the diameters of fiber monofilaments are controlled

by the number of holes in a wiredrawing leakage plate (that is, the drawing

leakage plate with a specific aperture); and specifically, the above-mentioned

wiredrawing method may adopt a one-step method or a two-step method.

One-step method: melting the mixture melted at 1400-1600°C, where

specifically, the preparation raw materials are added to a melting furnace to

melt at 1400-1600°C, and keep for 30-60 min to make a fiber-forming material;

and then introducing the fiber-forming material into the wiredrawing equipment

for wiredrawing, where specifically, the fiber-forming material is added to a

heating furnace of the wiredrawing equipment, and is wiredrawn into a fiber at

a temperature of 1400-1600°C.

Two-step method: melting the mixture is melted at 1450-1600°C, where

specifically, the preparation raw materials are added to a melting furnace to

melt at 1450-1600°C, keep for 30-60 min and cool to a temperature lower than

300 °C to make a mixture; melting the mixture at 1400-1600 °C , where

specifically, the mixture is added into the melting furnace to melt at 1400

1600°C and keep for 30-60 min; and introducing the mixture into wiredrawing

equipment for wiredrawing, where specifically, the mixture is added to the

heating furnace of the wiredrawing equipment, and is wiredrawn into a fiber at a temperature of 1400-1600°C.

(3) performing surface modifying treatment on the fiber formed by

wiredrawing through the wetting agent which is selected from one or two of

modified epoxy resin, polyethylene emulsion, and polyvinyl acetate.

In the above process, it can also undergo physical and chemical

modification, such as increasing the content of some metal elements in the

preparation raw materials, adjusting the ratio of the preparation raw materials,

and changing the properties of the fibers; and the formula of the wetting agent

is adjusted to change the physical characteristics of the fiber surface to meet

various application fields.

and (4) performing subsequent processes such as plying and cutting on

the fibers obtained in the above steps to obtain fiber products.

The features and performance of the invention are further described in

detail in combination with the following examples.

The fly ash used in the examples of invention is provided by a power

plant in Ningxia, with the main chemical component analysis as shown in

Table 1 (in terms of mass percentage).

Table 1 Main chemical components of fly ash (wt%)

Components Si02 A1203 Fe203 CaO MgO K20 Na20 Content (%) 48.00 24.08 7.07 11.96 1.32 2.34 1.82

The analysis of the main chemical components of the glass residues

used in the examples of invention is shown in Table 2 (in terms of mass percentage).

Table 2 Main chemical components of glass residues (wt%)

Components SiO2 A1203 Fe203 CaO MgO K20 Na20 Content (%) 57.56 0.70 11.12 7.22 3.04 0.20 12.81

Analysis of the main chemical components of the coal-to-oil waste

residues used in the examples of the invention is shown in Table 3 (in terms

of mass percentage).

Table 3 Main chemical components of coal-to-oil waste residues (wt%)

Components SiO2 A1203 Fe203 CaO MgO Content(%) 38.3 25.4 3.2 5.5 2.6

Analysis of the main chemical components of the coal gasification

residues used in the examples of the invention is shown in Table 4 (in terms

of mass percentage).

Table 4 Main chemical components of coal gasification residues (wt%)

Components SiO2 A1203 Fe203 CaO MgO Na20 TiO2

Content (%) 32.1 16.8 15.1 18.1 4.7 1.8 1.2

Analysis of the main chemical components of the electrolytic

manganese residues used in the examples of the invention is shown in Table

(by mass percentage).

Table 5 Main chemical components of electrolytic manganese residues

(wt%)

Components SiO2 A1203 Fe203 CaO MnO MgO Na20 TiO2

Content (%) 27.2 8.3 5.5 13.5 3.8 2.6 0.4 0.8

Example 1

The example provided a long fiber, where the specific preparation steps

were as follows:

(1) raw material components were as follows: 100 parts by weight of coal

to-oil waste residues (having 15%-20% of silicon and 10%-25% of aluminum),

parts by weight fly ash, 5 parts by weight of glass residues, and 2 parts by

weight of iron residues.

(2) The reparation method was as follows: coal-to-oil waste residues, fly

ash, glass residues and iron residue were crushed and grinded to pass

through a 30-50-mesh sieve, fed into a high-temperature furnace to heat to

1500°C after being uniformly mixed, and cooled to a temperature lower than

300°C to prepare a mixture; then the mixture was melted at 1500°Cagain, was

introduced into the wiredrawing equipment at 1500-1600°C, and was treated

with a wetting agent, namely modified epoxy resin to obtain the long fiber.

Example 2

The example provided a long fiber, where the specific preparation steps

were as follows:

(1) raw material components were as follows: 100 parts by weight of coal

to-oil waste residues (having 15%-20% of silicon and 10%-25% of aluminum), parts by weight of fly ash, 3 parts by weight of glass residues, and 2 parts by weight of iron residues.

(2) The reparation method was as follows: coal-to-oil waste residues, fly

ash, glass residues and iron residue were crushed and grinded to pass

through a 30-50-mesh sieve, fed into a high-temperature furnace to heat to

1500°C after being uniformly mixed, and cooled to a temperature lower than

300°C to prepare a mixture; then the mixture was melted at 1500°Cagain, was

introduced into the wiredrawing equipment at 1500-1600°C, and was treated

with a wetting agent, namely modified epoxy resin to obtain the long fiber.

Example 3

The example provided a long fiber, where the specific preparation steps

were as follows:

(1) raw material components were as follows: 100 parts by weight of coal

to-oil waste residues (having 15%-20% of silicon and 10%-25% of aluminum),

parts by weight of fly ash, 5 parts by weight of glass residues, and 3 parts

by weight of iron residues.

(2) The reparation method was as follows: coal-to-oil waste residues, fly

ash, glass residues and iron residue were crushed and grinded to pass

through a 30-50-mesh sieve, fed into a high-temperature furnace to heat to

1500°C after being uniformly mixed, and cooled to a temperature lower than

300 °C to prepare a mixture; then the mixture was melted again, was

introduced into the wiredrawing equipment at 1500-1600°C, and was treated

with a wetting agent, namely modified epoxy resin to obtain the long fiber.

Example 4

The example provided a long fiber, where the preparation steps were

substantially the same as the specific preparation steps of Example 1, and the

difference was that:

the raw material components were as follows: 80 parts by weight of coal

to-oil waste residues, 20 parts by weight of coal gasification residues (having

%-20% of silicon and 10%-25% of aluminum), 20 parts by weight of fly ash,

parts by weight of glass residues, and 2 parts by weight of iron residues.

Example 5

The example provided a long fiber, where the preparation steps were

substantially the same as the specific preparation steps of Example 1, and the

difference was that:

the raw material components were as follows: 100 parts by weight of

coal-to-oil waste residues (having 15%-20% of silicon and 10%-25% of

aluminum), 20 parts by weight of fly ash, 5 parts by weight of glass residues,

2 parts by weight of iron residues, and 5 parts by weight of electrolytic

manganese residues.

Example 6

The example provided a long fiber, where the preparation steps were

substantially the same as the specific preparation steps of Example 1, and the

difference was that:

coal-to-oil waste residues, fly ash, glass residues and iron residue were

crushed and grinded to pass through a 30-50-mesh sieve, fed into a high- temperature furnace to heat to 1500°C after being uniformly mixed, were introduced into the wiredrawing equipment at 1500-1600°C, and were treated with a wetting agent, namely modified epoxy resin to obtain the long fiber.

The performance test was performed on the long fiber of Examples 1 to 6

above, and the performance test results were shown in Table 6.

Table 6 Performance test results of long fiber in different examples

Items Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Diametersof 6.5 6.3 6.8 6.5 6.5 6.1 monofilaments pm Strength of monofilaments 1770 2232 2455 2843 2732 1742 MPa Elongation at 2.43 2.65 2.78 2.81 2.79 2.29 break %

(2 ol/Lesistce 88.3 88.1 88.5 88.1 87.8 87.9

(2mlali resistance 84.0 86.3 85.1 86.8 87.3 84.5

Heat resistance % 82.5 82.8 82.1 83.4 84.2 82.4 Water absorption % 0.22 0.21 0.22 0.27 0.24 0.21

In addition, continuous fiber production was performed by using a t

preparation raw material ratio different from that of the examples of the

invention, and the specific Comparative Examples were as follows:

The preparation method of Comparative Example 1 was substantially the

same as the preparation method of Example 1, and the difference was that:

100 parts by weight of coal-to-oil waste residues (having 15%-20% of silicon and 10%-25% of aluminum), 10 parts by weight of fly ash, 5 parts by weight of glass residues, and 2 parts by weight of iron residues. This Comparative

Example adopted the above raw materials to prepare, where wiredrawing

failed if the continuous long fiber could not be formed.

The preparation method of Comparative Example 2 was substantially the

same as the preparation method of Example 1, and the difference was that:

100 parts by weight of coal-to-oil waste residues (having 15%-20% of silicon

and 10%-25% of aluminum), 40 parts by weight of fly ash, 5 parts by weight of

glass residues, and 2 parts by weight of iron residues. This Comparative

Example adopted the above raw materials to prepare, where wiredrawing

failed if the continuous long fiber could not be formed.

The preparation method of Comparative Example 3 was substantially the

same as the preparation method of Example 1, and the difference was that:

100 parts by weight of coal-to-oil waste residues (having 15%-20% of silicon

and 10%-25% of aluminum), 20 parts by weight of fly ash, 7 parts by weight of

glass residues, and 2 parts by weight of iron residues. This Comparative

Example adopted the above raw materials to prepare the continuous long

fiber, where the strength of monofilaments was reduced in compared with that

of product of the Example 1.

The preparation method of Comparative Example 4 was substantially the

same as the preparation method of Example 1, and the difference was that:

100 parts by weight of coal-to-oil waste residues (having 15%-20% of silicon

and 10%-25% of aluminum), 20 parts by weight of fly ash, 5 parts by weight of

glass residues, and 5 parts by weight of iron residues. This Comparative

Example adopted the above raw materials to prepare the continuous long

fiber, where the elongation at break was reduced in compared with that of

product of the Example 1.

In the following, performance tests were performed on the long fiber of

Comparative Examples 3 to 4 in the same manner, and the performance test

results were shown in Table 7.

Table 7 Performance test results of long fiber of different comparative

examples

Items Comparative example 3 Comparative example 4 Diameters of monofilaments pm 6.5 6.6 Strength of monofilaments MPa 1558 1793 Elongation at break % 2.52 2.38 Acid resistance (2mol/L HCL, 5h) 87.2 87.5 Alkali resistance (2mol/L NaOH, 5h)% 84.1 84.0 Heat resistance % 82.7 82.9 Water absorption % 0.22 0.20

In summary, the coal chemical waste residue-based fiber and the

preparation method thereof in the examples of the invention adopted solid

waste such as coal chemical waste residues and fly ash as raw materials,

which had a high utilization rate of solid waste and produced fiber products

with excellent performance.

The above description is only an example of the invention, and is not

used to limit the protection scope of the invention. For those skilled in the art,

the invention may have various modifications and changes. Any modification, equivalent replacement, or improvement made within the spirit and principle of the invention shall be included in the protection scope of the invention.

Claims (1)

1. A coal chemical waste residue-based fiber, being prepared from the

following preparation raw materials in parts by weight: 100 parts of coal

chemical waste residues, 20-30 parts of fly ash, 3-5 parts of glass residues

and 2-3 parts of iron residues, wherein the coal chemical waste residues

comprise the following chemical elements in percentage by mass: 15%-20%

of silicon and 10%-25% of aluminum.

2. The coal chemical waste residue-based fiber according to claim 1,

wherein the coal chemical waste residues are selected from at least one of

coal-to-liquid waste residues and coal gasification residues.

3. The coal chemical waste residue-based fiber according to claim 1,

wherein the coal-to-oil waste residues comprises the following components in

percentage by mass: 35.3%-42.1% of SiO2, 21.4%-27.3% of A1203, 1.2%

7.2% of Fe2O3, 1.5%-6.4% of CaO and 0.6% -3.1% of MgO;

the coal gasification residues comprise the following components in

percentage by mass: 27.1%-35.8% of SiO2, 8.9%-18.5% of A1203, 8.1%

21.0% of Fe2O3, 8.1%-19.8% of CaO, 4.1%-5.1% of MgO, 1.1%-2.3% of

Na2O and 1.0%-1.4% of TiO2.

4. The coal chemical waste residue-based fiber according to claim 1 or 2,

wherein the coal chemical waste residues comprise coal-to-oil waste residues

and coal gasification residues in a weight ratio of (20-30):(3-6).

5. The coal chemical waste residue-based fiber according to claim 1,

wherein the preparation raw materials further comprise 5-10 parts by weight of electrolytic manganese residues.

6. The coal chemical waste residue-based fiber according to claim 1,

wherein the diameters of the monofilament are 7-12 pm.

7. A preparation method for the coal chemical waste residue-based fiber

according to claim 1, comprising the following steps: carrying out wiredrawing

on the mixture of the preparation raw materials under a molten state, and

carrying out surface modification treatment

8. The preparation method for the coal chemical waste residue-based

fiber according to claim 7, wherein the step of wiredrawing the mixture of

preparation raw materials in a molten state comprises:

melting the mixed preparation raw materials at 1400-1600 °C , and

introducing the preparation raw materials into wiredrawing equipment for

drawing;

or, melting the preparation raw materials after mixing at 1450-1600°C and

cooling the preparation raw materials to a temperature lower than 300°C to

prepare a mixture; melting the mixture at 1400-1600°C and introducing the

mixture into wiredrawing equipment for wiredrawing.

9. The preparation method for the coal chemical waste residue-based

fiber according to claim 7, wherein the surface modification treatment step

includes: using a wetting agent to perform surface modification treatment on

the fiber formed by wiredrawing, wherein the wetting agent is selected from a

group consisting one or two of modified epoxy resin, polyethylene emulsion

and polyvinyl acetate.