A high-aluminum fiber cotton and its production process

Abstract

The present invention relates to the technical field of fiber cotton, and provides a high-aluminum fiber cotton and its production process. A high-aluminum fiber cotton includes the following components in parts by mass: 70-85 parts of slag, 4-15 parts of dolomite, 0-10 parts of albite, 0-10 parts of waste residue, and 10-20 parts of modified bauxite. The raw materials of the modified bauxite include kaolin and bauxite. Through the above technical solution, the problem of low mechanical strength of high-aluminum fiber cotton in the related art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fiber cotton, and specifically, to a high-aluminum fiber cotton and its production process. Background Art

[0002] Fiber cotton is a raw material for processing tapes, plates, blankets, fiber blocks, fiber cement, fiber spray coatings, ramming materials, and fiber castables, and can also be directly used as a filler. According to different processing techniques, it is divided into spun fiber cotton and blown fiber cotton, and has the advantages of small bulk density, low thermal conductivity, and good filling performance, and is widely used in the fields of electric power, chemical industry, and construction.

[0003] Inorganic fiber cotton is a raw material for sound-absorbing boards, and usually requires an aluminum content of 10% - 14%. However, foreign countries require the product to be degradable, and the requirements for the raw materials of sound-absorbing boards have changed, and the requirement for the aluminum content of inorganic fiber cotton has become higher, that is, high-aluminum fiber cotton is required to be used as the raw material for sound-absorbing boards. However, the high-aluminum fiber cotton produced at present generally has the problem of low mechanical strength. Summary of the Invention

[0004] The present invention provides a high-aluminum fiber cotton and its production process, which solves the problem of low mechanical strength of high-aluminum fiber cotton in the related art.

[0005] The technical solution of the present invention is as follows:

[0006] A high-aluminum fiber cotton, comprising the following components in parts by mass: 70 - 85 parts of slag, 4 - 15 parts of dolomite, 0 - 10 parts of albite, 0 - 10 parts of waste residue, 10 - 20 parts of modified bauxite, and the raw materials of the modified bauxite include kaolin and bauxite.

[0007] As a further technical solution, the mass ratio of the kaolin to the bauxite is 0.5 - 2:20.

[0008] As a further technical solution, the mass ratio of the kaolin to the bauxite is 1 - 1.5:20.

[0009] The present invention limits the mass ratio of the kaolin to the bauxite to 1 - 1.5:20, further improves the mechanical strength of the high-aluminum fiber cotton, and further reduces the total amount of slag balls.

[0010] As a further technical solution, the raw materials of the modified bauxite further include magnesite and / or tetrapod zinc oxide whiskers.

[0011] The present invention further adds magnesite and / or tetrapod-like zinc oxide whiskers. During the processing, magnesite can be decomposed into magnesium oxide, and magnesium oxide and tetrapod-like zinc oxide whiskers can form spinel-like compounds with alumina, which wrap on the surface of alumina, inhibiting the contact between alumina grains and the diffusion between particles, hindering the growth of alumina grains, making the fiber cotton have a fine crystal structure, thereby further improving the mechanical strength of the high-aluminum fiber cotton and further reducing the total amount of slag balls.

[0012] As a further technical solution, when the raw materials of the modified bauxite also include magnesite and tetrapod-like zinc oxide whiskers, the mass ratio of the sum of the masses of magnesite and tetrapod-like zinc oxide whiskers to the mass of bauxite is 0.3 - 0.5:4.

[0013] The present invention limits the raw materials of the modified bauxite to magnesite and tetrapod-like zinc oxide whiskers, and limits the mass ratio of the sum of the masses of magnesite and tetrapod-like zinc oxide whiskers to the mass of bauxite to 0.3 - 0.5:4, further improving the mechanical strength of the high-aluminum fiber cotton and further reducing the total amount of slag balls.

[0014] As a further technical solution, the mass ratio of magnesite to tetrapod-like zinc oxide whiskers is 3:1.

[0015] The present invention limits the mass ratio of magnesite to tetrapod-like zinc oxide whiskers to 3:1, further improving the mechanical strength of the high-aluminum fiber cotton and further reducing the total amount of slag balls.

[0016] As a further technical solution, the mass content of Al 2 O 3 in the bauxite is 70% - 80%.

[0017] As a further technical solution, the preparation method of the modified bauxite includes the following steps: mixing the raw materials evenly and grinding them to obtain the modified bauxite.

[0018] The present invention also provides a production process of high-aluminum fiber cotton, including the following steps: mixing the components in the above parts by mass evenly, melting them, and centrifugally forming fibers to obtain high-aluminum fiber cotton.

[0019] As a further technical solution, the melting temperature is 1400 - 1600 °C.

[0020] The working principle and beneficial effects of the present invention are as follows:

[0021] In the present invention, adding the modified bauxite improves the mechanical strength of the high-aluminum fiber cotton. After the bauxite is modified by kaolin, during the processing of the fiber cotton, kaolin can improve the bonding strength of alumina, thereby enhancing the compactness inside the fiber cotton, achieving the effect of improving the mechanical strength of the high-aluminum fiber cotton. In addition, the total amount of slag balls is also reduced. Detailed implementation manners

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0023] The parameters of the raw materials in the following embodiments and comparative examples are as follows:

[0024] The mass content of CaO in the slag is 39.713%, SiO 2 The mass content is 30.764%, Al 2 O 3 The mass content is 15.714%, the mass content of MgO is 8.536%, SO 3 The mass content is 2.638%, from Tangshan Iron and Steel Group Co., Ltd.;

[0025] The mass content of CaO in the dolomite is 62.86%, SiO 2 The mass content is 2.16%, the mass content of MgO is 34.66%, and the particle size < 0.075 mm;

[0026] The SiO in the albite 2 The mass content is 67.25%, Al 2 O 3 The mass content is 18.41%, Na 2 The mass content of O is 11.58%, the mass content of CaO is 1.02%, P 2 O 5 The mass content is 0.435%, Fe 2 O 3 The mass content is 0.411%, TiO 2 The mass content is 0.343%, and the particle size is 200 mesh;

[0027] The waste residue is carbide slag. The mass content of Ca(OH) in the carbide slag 2 The mass content is 85.51%, Mg(OH) 2 The mass content is 0.76%, Fe 2 O 3 The mass content is 2.26%, Al 2 O 3 The mass content is 2.42%, SiO 2 The mass content is 4.26%, and the mass content of carbon slag is 2.15%;

[0028] The mass content of Al in bauxite 2 O 3 is 74.3%, the mass content of SiO 2 is 6.0%, the mass content of Fe 2 O 3 is 2.0%, the mass content of TiO 2 is 2.7%, d 50 = 6.413 μm, d 90 = 28.475 μm;

[0029] The mass content of MgO in magnesite is 45.7%, the mass content of CaO is 1.05%, the mass content of SiO 2 is 2.01%, the mass content of Al 2 O 3 is 0.30%, the mass content of Fe 2 O 3 is 1.43%, and the particle size is < 75 μm;

[0030] The diameter of the tetrapod-like zinc oxide whiskers is 0.5 - 5 μm and the length is 10 - 50 μm;

[0031] The kaolin is nano kaolin.

[0032] Example 1

[0033] S1. Mix 20 parts of bauxite and 0.5 part of kaolin evenly, and grind them for 20 min at a ball mill speed of 400 r / min to obtain modified bauxite;

[0034] S2. Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, and 15 parts of modified bauxite into an electric furnace, melt them at 1500 °C, and then centrifuge them into fibers with a four-roll centrifuge. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray them onto the collecting drum net, spray dust-proof oil, collect the fibers, and granulate them to obtain high-aluminum fiber cotton.

[0035] Example 2

[0036] S1. Mix 20 parts of bauxite and 0.5 part of kaolin evenly, and grind them for 20 min at a ball mill speed of 400 r / min to obtain modified bauxite;

[0037] S2. Add 70 parts of slag, 4 parts of dolomite, 10 parts of albite, 10 parts of waste residue, and 10 parts of modified bauxite into an electric furnace, melt them at 1400 °C, and then centrifuge them into fibers with a four-roll centrifuge. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray them onto a cotton collecting drum net, spray dust-proof oil, collect cotton, and granulate to obtain high-aluminum fiber cotton.

[0038] Example 3

[0039] S1. Mix 20 parts of bauxite and 0.5 part of kaolin evenly, and grind them for 20 min at a ball mill speed of 400 r / min to obtain modified bauxite.

[0040] S2. Add 85 parts of slag, 15 parts of dolomite, and 20 parts of modified bauxite into an electric furnace, melt them at 1600 °C, and then centrifuge them into fibers with a four-roll centrifuge. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray them onto a cotton collecting drum net, spray dust-proof oil, collect cotton, and granulate to obtain high-aluminum fiber cotton.

[0041] Example 4

[0042] S1. Mix 20 parts of bauxite and 1 part of kaolin evenly, and grind them for 20 min at a ball mill speed of 400 r / min to obtain modified bauxite.

[0043] S2. Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, and 15 parts of modified bauxite into an electric furnace, melt them at 1500 °C, and then centrifuge them into fibers with a four-roll centrifuge. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray them onto a cotton collecting drum net, spray dust-proof oil, collect cotton, and granulate to obtain high-aluminum fiber cotton.

[0044] Example 5

[0045] S1. Mix 20 parts of bauxite and 1.5 parts of kaolin evenly, and grind them for 20 min at a ball mill speed of 400 r / min to obtain modified bauxite.

[0046] S2. Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, and 15 parts of modified bauxite into an electric furnace, melt them at 1500 °C, and then use a four-roll centrifuge to centrifugally form fibers. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray onto a collecting drum net and spray dust-proof oil, collect the cotton, and granulate to obtain high-aluminum fiber cotton.

[0047] Example 6

[0048] S1. Mix 20 parts of bauxite and 2 parts of kaolin evenly, grind them at a ball mill speed of 400 r / min for 20 min to obtain modified bauxite.

[0049] S2. Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, and 15 parts of modified bauxite into an electric furnace, melt them at 1500 °C, and then use a four-roll centrifuge to centrifugally form fibers. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray onto a collecting drum net and spray dust-proof oil, collect the cotton, and granulate to obtain high-aluminum fiber cotton.

[0050] Example 7

[0051] S1. Mix 20 parts of bauxite, 1.5 parts of kaolin, and 1 part of magnesite evenly, grind them at a ball mill speed of 400 r / min for 20 min to obtain modified bauxite.

[0052] S2. Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, and 15 parts of modified bauxite into an electric furnace, melt them at 1500 °C, and then use a four-roll centrifuge to centrifugally form fibers. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray onto a collecting drum net and spray dust-proof oil, collect the cotton, and granulate to obtain high-aluminum fiber cotton.

[0053] Example 8

[0054] S1. Mix 20 parts of bauxite, 1.5 parts of kaolin, and 1 part of tetrapod zinc oxide whiskers evenly, grind them at a ball mill speed of 400 r / min for 20 min to obtain modified bauxite.

[0055] S2. Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, and 15 parts of modified bauxite into an electric furnace, melt them at 1500 °C, and then use a four-roll centrifuge to centrifugally form fibers. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray them onto a cotton collecting drum net and spray dust-proof oil, collect the cotton, and granulate to obtain high-aluminum fiber cotton.

[0056] Example 9

[0057] S1. Mix 20 parts of bauxite, 1.5 parts of kaolin, 0.5 part of magnesite, and 0.5 part of tetrapod zinc oxide whiskers evenly, and grind them for 20 min at a ball mill speed of 400 r / min to obtain modified bauxite.

[0058] S2. Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, and 15 parts of modified bauxite into an electric furnace, melt them at 1500 °C, and then use a four-roll centrifuge to centrifugally form fibers. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray them onto a cotton collecting drum net and spray dust-proof oil, collect the cotton, and granulate to obtain high-aluminum fiber cotton.

[0059] Example 10

[0060] S1. Mix 20 parts of bauxite, 1.5 parts of kaolin, 0.75 part of magnesite, and 0.75 part of tetrapod zinc oxide whiskers evenly, and grind them for 20 min at a ball mill speed of 400 r / min to obtain modified bauxite.

[0061] S2. Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, and 15 parts of modified bauxite into an electric furnace, melt them at 1500 °C, and then use a four-roll centrifuge to centrifugally form fibers. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray them onto a cotton collecting drum net and spray dust-proof oil, collect the cotton, and granulate to obtain high-aluminum fiber cotton.

[0062] Example 11

[0063] S1. Mix 20 parts of bauxite, 1.5 parts of kaolin, 1 part of magnesite, and 1 part of tetrapod zinc oxide whiskers evenly, and grind them for 20 min at a ball mill speed of 400 r / min to obtain modified bauxite.

[0064] S2. Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, and 15 parts of modified bauxite into an electric furnace, melt them at 1500 °C, and then centrifuge them into fibers by a four-roll centrifuge. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray them onto a collecting cotton drum net and spray dust-proof oil, collect the cotton, and granulate to obtain high-aluminum fiber cotton.

[0065] Example 12

[0066] S1. Mix 20 parts of bauxite, 1.5 parts of kaolin, 1.25 parts of magnesite, and 1.25 parts of tetrapod zinc oxide whiskers evenly, and grind them for 20 min at a ball mill speed of 400 r / min to obtain modified bauxite.

[0067] S2. Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, and 15 parts of modified bauxite into an electric furnace, melt them at 1500 °C, and then centrifuge them into fibers by a four-roll centrifuge. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray them onto a collecting cotton drum net and spray dust-proof oil, collect the cotton, and granulate to obtain high-aluminum fiber cotton.

[0068] Example 13

[0069] S1. Mix 20 parts of bauxite, 1.5 parts of kaolin, 1.5 parts of magnesite, and 1.5 parts of tetrapod zinc oxide whiskers evenly, and grind them for 20 min at a ball mill speed of 400 r / min to obtain modified bauxite.

[0070] S2. Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, and 15 parts of modified bauxite into an electric furnace, melt them at 1500 °C, and then centrifuge them into fibers by a four-roll centrifuge. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray them onto a collecting cotton drum net and spray dust-proof oil, collect the cotton, and granulate to obtain high-aluminum fiber cotton.

[0071] Example 14

[0072] S1. Mix 20 parts of bauxite, 1.5 parts of kaolin, 1.5 parts of magnesite, and 0.5 parts of tetrapod zinc oxide whiskers evenly, and grind them for 20 min at a ball mill speed of 400 r / min to obtain modified bauxite.

[0073] S2. Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, and 15 parts of modified bauxite into an electric furnace, melt them at 1500 °C, and then centrifuge them into fibers with a four-roll centrifuge. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray them onto a collecting drum screen, spray dust-proof oil, collect the fibers, and granulate them to obtain high-aluminum fiber cotton.

[0074] Example 15

[0075] S1. Mix 20 parts of bauxite, 1.5 parts of kaolin, 1.8 parts of magnesite, and 0.2 part of tetrapod zinc oxide whiskers evenly, and grind them for 20 min at a ball mill speed of 400 r / min to obtain modified bauxite.

[0076] S2. Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, and 15 parts of modified bauxite into an electric furnace, melt them at 1500 °C, and then centrifuge them into fibers with a four-roll centrifuge. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray them onto a collecting drum screen, spray dust-proof oil, collect the fibers, and granulate them to obtain high-aluminum fiber cotton.

[0077] Comparative Example 1

[0078] Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, 15 parts of bauxite, and 0.5 part of kaolin into an electric furnace, melt them at 1500 °C, and then centrifuge them into fibers with a four-roll centrifuge. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray them onto a collecting drum screen, spray dust-proof oil, collect the fibers, and granulate them to obtain high-aluminum fiber cotton.

[0079] Comparative Example 2

[0080] Add 75 parts of slag, 9 parts of dolomite, 5 parts of albite, 3 parts of waste residue, and 15 parts of bauxite into an electric furnace, melt them at 1500 °C, and then centrifuge them into fibers with a four-roll centrifuge. The operating frequencies of the four-roll centrifuge are 2000 rpm / min for the 1# roll, 5000 rpm / min for the 2# roll, 6200 rpm / min for the 3# roll, and 6400 rpm / min for the 4# roll. Spray them onto a collecting drum screen, spray dust-proof oil, collect the fibers, and granulate them to obtain high-aluminum fiber cotton.

[0081] The high-aluminum fiber cotton obtained in Examples 1 to 15 and Comparative Examples 1 to 2 was measured for fiber strength and total slag ball content according to the methods in Appendix C and Appendix D of JC / T 903-2012, and the measurement results were recorded in Table 1.

[0082] Table 1 Fiber Strength and Total Slag Ball Content of High-Aluminum Fiber Cotton

[0083]

[0084] As can be seen from Table 1, the high-aluminum fiber cotton provided by the present invention has a fiber strength of more than 50.1 mm and a total slag ball content of less than 37.7%. It has high strength and a low total slag ball content at the same time.

[0085] Compared with Comparative Examples 1 to 2, in Examples 1 to 15, bauxite modified by kaolin was used. In Comparative Example 1, kaolin and bauxite were added, and in Comparative Example 2, unmodified bauxite was used. The fiber strength of the high-aluminum fiber cotton obtained in Examples 1 to 15 is higher than that of Comparative Examples 1 to 2, and the total slag ball content is lower than that of Comparative Examples 1 to 2, indicating that after bauxite is modified by kaolin, the mechanical strength of high-aluminum fiber cotton can be improved, and the total slag ball content can be reduced.

[0086] The fiber strength of the high-aluminum fiber cotton obtained in Examples 4 to 5 is higher than that of Examples 1 and 6, and the total slag ball content is lower than that of Examples 1 and 6, indicating that when the mass ratio of kaolin to bauxite is 1 to 1.5:20, the mechanical strength of high-aluminum fiber cotton can be further improved, and the total slag ball content can be further reduced.

[0087] The fiber strength of the high-aluminum fiber cotton obtained in Examples 7 to 15 is higher than that of Example 5, and the total slag ball content is lower than that of Example 5, indicating that further adding magnesite and / or tetrapod zinc oxide whiskers to modify bauxite can further improve the mechanical strength of high-aluminum fiber cotton and further reduce the total slag ball content.

[0088] The fiber strength of the high-aluminum fiber cotton obtained in Examples 10 to 12 is higher than that of Examples 9 and 13, and the total slag ball content is lower than that of Examples 9 and 13, indicating that when the mass sum of magnesite and tetrapod zinc oxide whiskers to bauxite is 1.5 to 2.5:1.5, the mechanical strength of high-aluminum fiber cotton can be further improved, and the total slag ball content can be further reduced.

[0089] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-aluminum fiber cotton, characterized in that: The invention comprises the following components in parts by weight: 70-85 parts of slag, 4-15 parts of dolomite, 0-10 parts of albite, 0-10 parts of waste residue, and 10-20 parts of modified bauxite, wherein the raw materials of the modified bauxite include kaolin and bauxite; The preparation method of the modified bauxite comprises the following steps: mixing raw materials uniformly and grinding them to obtain modified bauxite; The kaolin is nano kaolin.

2. The high-aluminum fiber cotton according to claim 1, characterized in that: The mass ratio of kaolin to bauxite is 0.5-2:

20.

3. The high-aluminum fiber cotton according to claim 2, characterized in that: The mass ratio of kaolin to bauxite is 1-1.5:

20.

4. The high-aluminum fiber cotton according to claim 3, characterized in that: The raw materials of the modified bauxite also include magnesite and / or tetrapod-shaped zinc oxide whiskers.

5. The high-aluminum fiber cotton according to claim 4, characterized in that: When the raw materials of modified bauxite also include magnesite and tetrapod-shaped zinc oxide whiskers, the mass ratio of the magnesite and tetrapod-shaped zinc oxide whiskers to the mass ratio of bauxite is 0.3-0.5:

4.

6. The high-aluminum fiber cotton according to claim 5, characterized in that: The mass ratio of the magnesite to the tetrapod-shaped zinc oxide whiskers is 3:

1.

7. The high-aluminum fiber cotton according to claim 2, characterized in that: The mass content of Al2O3 in the bauxite is 70% to 80%.

8. The production process of high-aluminum fiber cotton according to any one of claims 1 to 7, characterized in that: The following steps are involved: The components in parts by mass are mixed uniformly, melted, and centrifuged into fibers to obtain high-aluminum fiber cotton.

9. The production process of high-aluminum fiber cotton according to claim 8, characterized in that: The melting temperature is 1400-1600°C.

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