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Surface treatment method of tantalum spinning nozzle

A technology of surface treatment and spinneret, which is applied in the field of surface treatment of tantalum spinnerets, and can solve problems affecting spinneret spinnability and hole plugging

Active Publication Date: 2018-09-14
BEIJING HUAYU CHUANGXIN TA NB SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If powdery additives are added when spinning the above-mentioned special fibers, or if the spinning process is unstable and particles appear in the stock solution, it is hoped that the roughness of the micropore wall of the spinneret will be lower, otherwise it will be more likely to cause hole plugging, Thereby affecting the spinnability of the spinneret

Method used

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  • Surface treatment method of tantalum spinning nozzle
  • Surface treatment method of tantalum spinning nozzle
  • Surface treatment method of tantalum spinning nozzle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Reference figure 2 , Explain the surface treatment method for wet spinning of the present invention. The steps of Example 1 are as follows:

[0081] Step 1. Process the metal tantalum plate into 45 tantalum spinnerets using existing technology. Every tantalum spinneret is like figure 1 Shown. The tantalum spinneret includes a main body 2, the outer diameter of the spinneret exit surface 1 is 16mm, the number of micro-holes 12 is 2600, and the inner diameter of the micro-holes is 0.052±0.001mm.

[0082] Step 2. Use 0.01% H at room temperature 25℃ 3 Po 4 , After applying 150V anode voltage and constant voltage for 1 hour, cleaning will form a layer of amorphous amorphous Ta on the surface of the tantalum spinneret 2 O 5 Membrane 3, such as Figure 4 .

[0083] Step 3. Using step (c), polishing and removing the amorphous Ta from the silk surface 1 2 O 5 膜3。 Film 3.

[0084] Step 4. Coating: Apply a 10 volt anode voltage to a molten lithium nitrate solution at 488° C. and react ...

Embodiment 2

[0092] Reference figure 2 , Explain the surface treatment method of the spinneret for wet spinning of the present invention. The steps of Example 2 are as follows:

[0093] Step 1. Use the existing technology to process the metal tantalum plate into 27 tantalum spinnerets, each of which is figure 1 Shown. The tantalum spinneret includes a body 2, the outer diameter of the spinneret outlet surface 1 is 16mm, the number of microholes is 1400, and the inner diameter of the microholes is 0.083±0.001mm.

[0094] Step 2. Use 0.01% H at room temperature 25℃ 3 Po 4 , After applying 150V anode voltage and constant voltage for 1 hour, clean it. A layer of amorphous Ta is formed on the surface of the tantalum spinneret 2 O 5 膜3。 Film 3.

[0095] Step 3. Using step (c), polish to remove Ta from the silk surface 1 2 O 5 膜3。 Film 3.

[0096] Step 4. Coating: Apply a 10 volt anode voltage to a molten lithium nitrate solution at 488° C., and react at a constant pressure for 2 hours to obtain a fil...

Embodiment 3

[0101] Reference figure 2 , According to the surface treatment method for wet spinning of the present invention, the steps of Example 3 are as follows:

[0102] Step 1. Use the existing technology to process the metal tantalum plate into a tantalum spinneret, such as figure 1 As shown, the tantalum spinneret includes a body 2, the outer diameter of the spinneret exit surface 1 is 22mm, the number of micropores is 330, and the inner diameter of the micropores is 0.082±0.001mm.

[0103] Step 2. The tantalum spinneret obtained in step (a) is subjected to nitriding treatment according to the method of step (b) of the inventor's patent 02106915.8 to obtain a spinneret hardness of HV385.

[0104] Step 3. Use ethylene glycol: 0.01% H 3 Po 4 =2:1 solution, the solution temperature is 90°C plus 60V anode voltage constant pressure for 1.5 hours and then cleaned. A layer of amorphous Ta is formed on all surfaces of the spinneret 2 O 5 膜3。 Film 3.

[0105] Step 4. Use step (c) polishing to remov...

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Abstract

A surface treatment method of a tantalum spinning nozzle is characterized by comprising the following steps: (a) processing a metal tantalum sheet to produce the tantalum spinning nozzle; (a1), processing the tantalum spinning nozzle manufactured in step (a) by nitriding based on the method in step (b) of the patent ZL02106915.8 of the inventor, or skipping processing and directly entering the next step (b); (b) forming a proper amorphous Ta2O5 film on the tantalum spinning nozzle by a method for manufacturing a tantalum anode through a tantalum electrolyzing capacitor in the prior art; (c) polishing: polishing a silk yielding surface of the tantalum spinning nozzle processed in step (b), and grinding to remove the insulated amorphous Ta2O5 film on the surface of the silk yielding surface;(d) coating: coating the tantalum spinning head which is provided with the amorphous Ta2O5 film by anode oxidizing so as to form a film containing a lithium-containing compound; (e) polishing: polishing the silk yielding surface of the tantalum spinning nozzle processed in step (d), and grinding to remove the insulated film layer containing the lithium-containing compound on the silk yielding surface.

Description

Technical field [0001] The invention relates to a surface treatment method of a tantalum spinneret. More specifically, the present invention relates to a surface treatment method of a spinneret for wet or dry-wet spinning, particularly a surface treatment method of a tantalum spinneret. Background technique [0002] The production of chemical fiber has developed vigorously at the end of the 20th century. With the vigorous development of my country's economy, my country has become the world's largest chemical fiber producer. The chemical fiber industry has become an important part of the national economy, and the spinneret (plate) is the most precise and critical component in chemical fiber production. The quality of the spinneret (plate) directly affects the product quality, labor productivity, and cost of chemical fiber production. People have been constantly improving spinnerets to meet the development needs of chemical fiber production. [0003] The production process of chem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/04C25D11/26C25D9/04
CPCC23C28/042C25D9/04C25D11/26C23C28/04D01D4/022
Inventor 刘寓中
Owner BEIJING HUAYU CHUANGXIN TA NB SCI&TECH CO LTD
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