Method for recycling CBN (Cubic Boron Nitride) abrasive from waste product obtained by producing ceramic bonding agent CBN grinding wheel

A vitrified bond and grinding wheel technology, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of difficulty in recycling CBN abrasives, high strength and chemical stability, and achieve uniform structure and good bonding of grinding wheels

Active Publication Date: 2017-05-17
江苏华东砂轮有限公司
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Problems solved by technology

In the preparation process of ceramic CBN grinding wheel, sintering and mechanical processing will produce about 5% waste products, and this part of waste products has been sintered to form a ceramic body, w

Method used

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  • Method for recycling CBN (Cubic Boron Nitride) abrasive from waste product obtained by producing ceramic bonding agent CBN grinding wheel
  • Method for recycling CBN (Cubic Boron Nitride) abrasive from waste product obtained by producing ceramic bonding agent CBN grinding wheel

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Embodiment Construction

[0014] The specific steps for recovering the CBN abrasive in the vitrified bond CBN grinding wheel are:

[0015] (1) Put the waste CBN grinding wheel into the electric furnace, raise the temperature to 500°C at a heating rate of 5°C / min in the air atmosphere, and keep it at 500°C for 1.5 hours. After the furnace is closed, the grinding wheel is cooled with the furnace. When the temperature is below 60°C, the grinding wheel is taken out from the furnace, and the working layer of the grinding wheel is peeled off from the metal substrate to obtain the working layer of the CBN grinding wheel.

[0016] (2) Soak the CBN grinding wheel working layer obtained in step (1) in absolute ethanol, clean the CBN working layer for 1 hour with an ultrasonic frequency of 60KHZ, and then put the CBN working layer into an electric furnace at a heating rate of 3 Raise the temperature to 550°C at a rate of °C / min, keep the temperature at 550°C for 0.5 hours, open the furnace, take out the CBN worki...

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Abstract

The invention discloses a process for recycling a CBN (Cubic Boron Nitride) abrasive in a ceramic bonding agent CBN grinding wheel waste product by a chemical etching method. The process comprises the following steps: heating a ceramic bonding agent CBN grinding wheel in an air atmosphere to be 500 to 550DEG C, and insulating for 1 to 2 hours; cooling the grinding wheel along with a furnace and then separating a ceramic CBN working layer from a metallic matrix; cleaning the ceramic bonding agent CBN working layer by ultrasonic waves, then putting into an electric furnace and heating to be 550DEG C; carrying out water quenching and then carrying out ball milling for a short time of 4 to 6 minutes, and breaking into powder; taking ceramic bonding agent CBN grinding wheel powder, impregnating into a NaOH solution at the temperature of 80 to 95DEG C, insulating for 3 to 5 hours and flushing to be neutral; subsequently impregnating the powder into an HF solution at the temperature of 80 to 95DEG C, insulating for 3 to 5 hours and flushing to be neutral; finally, enabling residual powder to pass through a corresponding screen mesh, thus obtaining CBN recycled abrasive of which the purity is higher and the grit size meets the service requirement. The problem that waste products generated by the ceramic bonding agent CBN grinding wheel in sintering and processing procedures are difficult to recycle is solved.

Description

technical field [0001] The invention relates to a process for recovering CBN abrasives from waste products prepared by vitrified CBN grinding wheels, especially capable of recycling CBN abrasives in vitrified CBN grinding wheels at a relatively low cost without damaging the physical and chemical properties of the CBN abrasives. Background technique [0002] CBN material is the material whose hardness is second only to diamond among the currently known materials, and it is often used as a tool. The artificially synthesized CBN materials are all in the form of powder, and the preparation method of the vitrified bond CBN grinding wheel adopts ceramic materials. The ceramic material is used to bond the CBN powder together by dry pressing, and the grinding wheel blank is dried for a period of time to a certain extent. The heat treatment system is sintered, and then the sintered CBN grinding wheel is bonded to the metal standard part through organic adhesive, and finally the grind...

Claims

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Application Information

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IPC IPC(8): C09K3/14
CPCC09K3/1409
Inventor 刘小磐陈瑞和
Owner 江苏华东砂轮有限公司
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