Method for manufacturing air distribution blower

A purifier and gas distribution technology, applied in the field of powder metallurgy, can solve the problems of unsatisfactory gas permeability and strength, low strength and wear resistance, and uniform distribution of difficult gases, so as to ensure high strength and uniform deformation. , The effect of strength improvement and product quality assurance

Active Publication Date: 2011-10-12
CHINA PETROLEUM & CHEM CORP +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the invention patent application disclosed by the publication number CN201495203U "A pneumatic cone for pulverized coal gasification" is to uniformly open 2-4mm holes on the cone. This method is simple to prepare, but the number of holes is limited. Difficulty distributing gas evenly
[0003] The Chinese Utility Model Patent No. ZL200920033293.8 discloses "A Method for Integral Forming of Large-scale Sintered Porous Conical Tube", which uses powder metallurgy to prepare metal powder by pressing and sintering to obtain sintered metal porous / tube. Its characteristics It is a sintered metal powder porous conical tube with uniform distribution of pores, but low strength and wear resistance
[0004] The Chinese utility model patent with the patent number CN200920171953.9 discloses a "powder fluidized conveying device", which uses a microporous fluidized plate as a filter device, and its gas permeability and strength are not ideal
[0005] In the prior art, the powder sintered body is basically simply used, which is a porous element formed by "linking" the powder particles together by means of a sintered neck. This sintered neck has a large deformation under the action of an external force. amount will destroy

Method used

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  • Method for manufacturing air distribution blower
  • Method for manufacturing air distribution blower
  • Method for manufacturing air distribution blower

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This example is prepared as figure 1 316L multi-hole tubular purger shown.

[0026] Add 2wt% binder to the stainless steel powder with a particle size of 200 to 300 meshes. The binder in this example is a mixture of carboxymethyl cellulose and polymethyl methacrylate in a weight ratio of 1:4 ; The stainless steel powder and the binder are mixed uniformly by ball milling, pressed in a cold isostatic press, and the pressed blank is sintered in a hydrogen atmosphere.

[0027] A stainless steel wire mesh with a wire diameter of 0.5 mm was selected.

[0028] The surface finish of the pressing mold mandrel is 8.0, the hardness of the rubber sleeve used is 80HA, and the surface finish of the stainless steel shell is 8.0.

[0029] The stainless steel wire mesh and the above-mentioned mixed stainless steel powder are filled in a pressing mold. Under the pressing pressure of 200 MPa, the blank 3 of Ф200×5×400 was pressed in a cold isostatic press. The partial cross-sectional ...

Embodiment 2

[0033] This example is prepared as figure 1 316L multi-hole tubular purger shown.

[0034] Based on the weight of the stainless steel powder, add a binder with a total amount of 3 wt% to the stainless steel powder with a particle size of 200-300 mesh, and mix evenly by ball milling. The binder used is a mixture of carboxymethyl cellulose and polymethyl methacrylate, wherein the amount of carboxymethyl cellulose is 2 wt%, and the amount of polymethyl methacrylate is 1 wt%.

[0035] A stainless steel wire mesh with a wire diameter of 0.1 mm was selected.

[0036] The surface finish of the pressing mold mandrel is 7.5, the hardness of the rubber sleeve used is 70HA, and the surface finish of the stainless steel shell is 7.5.

[0037] The stainless steel wire mesh and the above-mentioned mixed stainless steel powder are filled in a pressing mold. Under the pressing pressure of 150 MPa, the blank 3 of Ф200×5×400 was pressed in a cold isostatic press. The partial cross-sectional...

Embodiment 3

[0041] This example is prepared as figure 2 316L Multi-Porous Cone Purger shown.

[0042] Based on the weight of the stainless steel powder, add a binder with a total amount of 3 wt% to the stainless steel powder with a particle size of 100-160 mesh, and mix evenly by ball milling. The binder used is carboxymethyl cellulose.

[0043] A stainless steel wire mesh with a wire diameter of 0.8 mm was selected.

[0044] The surface finish of the mandrel of the pressing mold is 7.5, the hardness of the rubber sleeve used is 90HA, and the surface finish of the stainless steel shell is 7.

[0045] The stainless steel wire mesh and the above-mentioned mixed stainless steel powder are filled in a pressing mold. Under the pressing pressure of 250MPa, it is pressed into a conical blank of Ф440 / 330, thickness 8mm, and taper 12° in a cold isostatic press, such as figure 2 As shown, the partial cross-sectional view of the blank is as follows image 3As shown, stainless steel wire mesh ...

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Abstract

The invention relates to a method for manufacturing an air distribution blower, which is characterized by comprising the following steps of: (1) adding a binder into metal powder with the particle size of 20 to 400 meshes, uniformly mixing, clamping a metal wire mesh with the wire diameter of 0.1 to 3mm in the mixture, putting into a pressing mold, and pressing into an element blank by using an isostatic pressing machine under the pressing pressure of 100 to 250MPa; and (2) uniformly filling a sintering filler at the periphery of the element blank, sintering in a vacuum furnace or a hydrogen atmosphere furnace, raising the temperature to be between 300 and 400 DEG C, preserving heat for 1 to 3 hours, removing the binder, raising the temperature to be between 1,000 and 1,500 DEG C, preserving heat for 1 to 5 hours, and sintering to obtain the air distribution blower. Compared with the prior art, the air distribution blower has high compression resistance and production efficiency and low cost.

Description

technical field [0001] The invention relates to the field of powder metallurgy, and specifically refers to a method for preparing a conical or tubular gas distribution purger for powder transportation and related industries. Background technique [0002] At present, there are usually two methods for preparing large-scale porous cones and porous tubes for gas distribution. One is the method of drilling dense plates, and the other is the method of powder metallurgy. For example, the invention patent application disclosed by the publication number CN201495203U "A pneumatic cone for pulverized coal gasification" is to uniformly open 2-4mm holes on the cone. This method is simple to prepare, but the number of holes is limited. Difficulty distributing gas evenly. [0003] The Chinese Utility Model Patent No. ZL200920033293.8 discloses "A Method for Integral Forming of Large-scale Sintered Porous Conical Tube", which uses powder metallurgy to prepare metal powder by pressing and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16C22C1/08B65G53/18
Inventor 赵斌义吴引江杨俊岭王琳于素艳董领峰段新群王翠翠关桂苹吴天平
Owner CHINA PETROLEUM & CHEM CORP
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