A method of removing nitriding salt bath slag by using the principle of magnetic adsorption

A magnetic adsorption and salt bath technology, applied in chemical instruments and methods, magnetic separation, solid-state diffusion coating, etc., can solve the problems of blocking production efficiency and low efficiency, and achieve the effects of easy operation, enhanced suction, and low efficiency

Active Publication Date: 2019-10-08
CHENGDU SHENGXIANG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to: aim at the problems of incomplete and inefficient removal of slag in the existing nitriding salt bath, the present invention provides a method for removing slag from the nitriding salt bath by using the principle of magnetic adsorption. The method uses an external magnet to act on the salt bath, absorbing coarse slag and fine slag at the same time, to achieve the purpose of complete slag removal, and also solve the problem of low efficiency caused by the interruption of production due to slag removal in the existing salt bath nitriding process

Method used

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  • A method of removing nitriding salt bath slag by using the principle of magnetic adsorption
  • A method of removing nitriding salt bath slag by using the principle of magnetic adsorption

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Experimental program
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Effect test

Embodiment 1

[0030] The mode that the external magnet acts on the salt bath is that the magnetic pole 2 of the shoe-shaped iron core 4 is stretched in the salt bath 3, directly the magnetic pole 2 of the shoe-shaped iron core 4 is put into the salt bath 3, and the magnetic device 6 makes the shoe-shaped iron After the core 4 is magnetized, the effect of absorbing slag can be achieved, the structure is simple, easy to operate, and the cost is low.

Embodiment 2

[0032] The way that an external magnet acts on the salt bath is to extract the salt bath and flow through the magnetic pole 2 of the shoe-shaped iron core 4, specifically: extract the salt bath 3 from the nitride salt bath 1 containing the salt bath 3 and make the salt bath 3 The flow passes through a sloping plate 8 arranged above the nitride salt bath 1 , so that the salt bath 3 contacts the magnetic pole 2 arranged on the sloping plate 8 . A salt extraction pipeline 9 can be set, one end of the salt extraction pipeline 9 is placed in the nitride salt bath 1, the other end is placed above the deflector swash plate 8, and a circulation pump 10 is set on the salt extraction pipeline 9 to remove the salt bath from the nitriding The salt bath is extracted from the salt bath tank 1 and flows to the deflector inclined plate 8 through the salt extraction pipe 9 to remove the slag, and the salt bath from which the slag is removed finally flows back to the nitride salt bath tank 1 to ...

Embodiment 3

[0035] Based on the above embodiment, the shoe-shaped iron core 4 between the magnetic pole 2 and the magnetic device 6 is provided with a cooling package 5, which can prevent the high temperature of the salt bath from being transmitted to the magnetic device 6 and affect the magnetization effect of the shoe-shaped iron core 4. .

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Abstract

The invention discloses a method for removing furnace slag in a nitriding salt bath by utilizing a magnetic adsorption principle. In the method, an additional magnet acts on the salt bath to adsorb the furnace slag. The principle of the method is that the Curie temperature of iron is higher than 700 DEG C, therefore, the ferromagnetism may exist within the working temperature range (500-600 DEG C) of the nitriding salt bath, however, a magnetic force is reduced because of being affected by a medium / high-temperature environment, and therefore, the magnetization effect can be guaranteed only if an additional magnetic field is provided. Most of components in the furnace slag in the nitriding salt bath are ferromagnetic substances, and therefore, the furnace slag can be adsorbed by guaranteeing a magnetic pole and the magnesium of the furnace slag near the magnetic pole by the external magnetic field. By using the method, coarse slag is removed, and meanwhile, fine slag having key influences to a salt bath nitriding process in the salt bath can also be removed, so that the effect of thoroughly removing the slag is achieved; and meanwhile, the production is not needed to be stopped when the slag is removed by using the method, so that the production efficiency is greatly increased.

Description

technical field [0001] The invention belongs to the technical field of salt bath nitriding, relates to a slag removal process in the field of salt bath nitriding, in particular to a method for removing slag in a nitriding salt bath by using the principle of magnetic adsorption. Background technique [0002] Salt bath nitriding process is a chemical heat treatment process, which provides active nitrogen atoms through cyanate ions in the salt bath, and makes them penetrate into the surface of iron base to form hard and dense iron nitrogen compounds, thereby greatly improving the quality of iron base. Wear resistance and corrosion resistance of the material. In the salt bath nitriding technology, how to ensure the cleanliness of the salt bath is the key to this technology, and the reliable and thorough slag removal process is the key process to ensure the cleanliness of the salt bath. [0003] The slag of the nitriding salt bath can be divided into coarse slag and fine slag ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/50B03C1/02
Inventor 侯永松管安虎
Owner CHENGDU SHENGXIANG TECH
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