Nickel-copper alloy sintered silk screen filter plate and manufacturing method thereof

Abstract

The invention discloses a nickel-copper alloy sintered silk screen filter plate and a manufacturing method thereof. The manufacturing process comprises the steps of screen laying, sintering, machining and acid pickling. A nickel-copper alloy sintered silk screen is made of Monel 400, and has the advantages of being highly acid-base resistant, high temperature resistant, wide in application range and the like. The nickel-copper alloy sintered silk screen filter plate is a filter element with high permeation performance, filtering precision is 3-100 micrometers, filtering efficiency reaches 99.8%, the permeability coefficient is not smaller than 15 m<3> / m<2>.kPa.h, and the problems that a powder sintered filter plate made of the same metal material is poor in permeation performance, low in pollutant holding quantity, poor in back flushing effect and the like are effectively solved.

Description

technical field [0001] The invention relates to a preparation method of a high-permeability filter separation material, in particular to a nickel-copper alloy sintered wire mesh filter plate and a preparation method thereof. Background technique [0002] Sintered metal mesh filter element is an important part of sintered metal filter element, and because of its machinability, it is made into porous elements of various shapes by engineers, and has been widely used in filtration, air distribution, fluid distribution control, etc. field of process industries. Monel 400 nickel-copper alloy has always been the core material used in cutting-edge fields such as petrochemical industry, nuclear industry, and national defense industry because of its excellent high temperature resistance, oxidation resistance, and corrosion resistance. The sintered wire mesh composite board is not easy to be sintered and shaped, and the application of nickel-copper alloy sintered wire mesh has been li...

AI Technical Summary

Problems solved by technology

Monel 400 nickel-copper alloy has always been the core material used in cutting-edge fields such as petrochemical industry, nuclear industry, and national defense industry because of its excellent high temperature resistance, oxidation resistance, and corrosion resistance. The sintered wire mesh composite board is not easy to be sintered and formed, and the application of nickel-copper alloy sintered wire mesh has been limited in some specific fields.

At present, the more porous plates used are ceramic filter plates or sintered Monel 400 powder filter plates, but due to their materials and molding methods, this type of filter plates has problems such as poor air permeability, poor effect, and short service life (such as , the ceramic filter plate is prone to breakage due to its brittleness and is not easy to process; the metal powder sintered plate has poor air permeability and high energy consumption)

[0003] The utility model patent "Monel nickel-copper alloy sintered mesh" (CN201220167142.3) and the utility model patent "Monel nickel-copper alloy sintered mesh fluidized plate" (CN201220167141.9) both involve Monel 400 nickel-copper alloy sintered wire The preparation of the net, but its content does not involve the sintering process of the sintered net and the subsequent processing of the filter element, but only optimizes the structure of the sintered net (support layer, control layer, protective layer, etc.). However, Inmonel 400 The material properties of nickel-copper alloy and its wire mesh make the filter element need to overcome many technical difficulties such as sintering and post-machining treatment during the preparation process.

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