Manufacture process of immersive elongated-nozzle zirconia flow control

A manufacturing process and shroud technology, which is applied in the manufacturing process of submerged shroud zirconia flow control parts, can solve problems such as weak erosion resistance, poor thermal shock stability, and insufficient wear resistance, and achieve improved erosion resistance , enhance the stability, reduce the effect of cracking

Inactive Publication Date: 2016-05-25
TAICANG HONGDA JUNMENG NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent still fails to avoid the combination of stabilized zirconia and monoclinic zirconia, which still has the disadvantages of poor mechanical strength, insufficient wear resistance, weak erosion resistance, and especially poor thermal shock stability.

Method used

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  • Manufacture process of immersive elongated-nozzle zirconia flow control

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A manufacturing process of submerged shroud zirconia flow control parts, the process steps are:

[0036] 1) Mixing and grinding of raw materials: Mix and grind 85% zirconia, 12% basic magnesium carbonate and 3% strontium oxide for 14 hours to obtain fine powder; the ratio of fine powder to material is 2:1, fine powder Fineness requires 95wt% fine powder to pass through a 400 mesh screen;

[0037] 2) Raw material billet: add 2.5% chemical paste to the above fine powder, the chemical paste is prepared from carboxymethyl cellulose and water, wherein the mass ratio of carboxymethyl cellulose to water is 1 :10, and stir with a mixer, and press it into a raw material green body in a mould;

[0038] 3) Firing: Put the raw body into the kiln furnace, fire at 1350°C, keep the temperature for 9 hours, and the total firing time is 45 hours to obtain the sintered body;

[0039] 4) Particle preparation: sequentially crush the sintered green body with jaw crusher, roller compaction...

Embodiment 2

[0052] A process flow of a submerged long nozzle zirconia flow control member, the steps of the process flow are:

[0053] 1) Mixing and grinding of raw materials: 87% zirconium dioxide, 12% basic magnesium carbonate and 1% iridium oxide were mixed and ground for 16 hours to obtain a fine powder. The ball-to-material ratio of the fine powder was 2:1. Powder fineness 95% through 400 mesh;

[0054] 2) Raw material billet: add 3% chemical paste to the above fine powder, the chemical paste is prepared from carboxymethyl cellulose and water, wherein the mass ratio of carboxymethyl cellulose to water is 1 :10, and stir with a mixer, and press it into a raw material green body in a mould;

[0055] 3) Firing: Put the raw body into the kiln, fire at 1400°C, keep it warm for 10 hours, and the total firing time is 50 hours to obtain the sintered body;

[0056] 4) Particle preparation: successively crush the sintered green body with jaw crusher, roller compaction, and sieving machine to...

Embodiment 3

[0069] A process flow of a submerged long nozzle zirconia flow control member, the steps of the process flow are:

[0070] 1) Mixing and grinding of raw materials: 83% zirconium dioxide, 14% basic magnesium carbonate and 3% iridium oxide were mixed and ground for 15 hours to obtain a fine powder. The ball-to-material ratio of the fine powder was 2:1. Powder fineness 95% through 400 mesh;

[0071] 2) Raw material blanking: add 2.8% chemical paste to the above fine powder, the chemical paste is prepared from carboxymethyl cellulose and water, wherein the mass ratio of carboxymethyl cellulose to water is 1 :10, and stir with a mixer, and press it into a raw material green body in a mould;

[0072] 3) Firing: Put the raw body into the kiln furnace, fire at 1350°C, keep it warm for 12 hours, and the total firing time is 50 hours to obtain the sintered body;

[0073] 4) Particle preparation: successively crush the sintered green body with jaw crusher, roller compaction, and sievin...

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Abstract

The invention provides a manufacture process of an immersive elongated-nozzle zirconia flow control, comprising the following steps: 1), mixing and grinding raw materials; 2), making the materials into blanks; 3), firing; 4) preparing particles; 5), removing iron; 6), preparing powder; 7), mixing semi-finished products; 8), granulating; 9), forming under high pressure; 10), drying; 11) charging into a kiln; 12), sintering at high temperature; 13) emptying the kiln; 14), inspecting and packaging to obtain finished products. The immersive elongated-nozzle zirconia flow control manufactured by using the process has high normal-temperature pressure resistance, good thermal shock stability and good scour resistance, zirconium product cracks are effectively reduced, product quality is guaranteed, and the life of each product is prolonged.

Description

technical field [0001] The invention belongs to the technical field of production and processing of zirconium products, and in particular relates to a manufacturing process of a submerged shroud zirconia flow control element. Background technique [0002] The zirconium products currently used all use fused stabilized zirconia as the main raw material, adding a small amount of fused monoclinic zirconia or desiliconized zirconia, and pressing them into shape. This method has poor stability and low compressive strength at room temperature. And the service life is short. The existing zirconium products have a single structure. Although titanium dioxide and calcium oxide are added to increase a certain degree of stability, their mechanical strength is poor, their wear resistance is not enough, their erosion resistance is weak, and their thermal shock stability is poor. In addition, since there is no step of removing impurities in the process, the product has a high impurity cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/626C04B35/636C04B35/622
CPCC04B35/48C04B35/622C04B35/626C04B35/6365C04B2235/3206C04B2235/3213C04B2235/401C04B2235/404C04B2235/96
Inventor 严建忠
Owner TAICANG HONGDA JUNMENG NEW MATERIAL
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