Fibrous roller abrasive dust recycling method

Abstract

The invention discloses a fibrous roller abrasive dust recycling method, which comprises the process steps as follows: (1) adding the abrasive dust into an alkaline solution, heating and stirring for removing grease; (2) after filtering, washing and drying mixed liquor of abrasive dust and water, carrying out heat treatment at inert atmosphere, and obtaining the grease removing abrasive dust; (3) grinding grease removing abrasive dust into powder, and then screening and removing grinding wheel chips in the abrasive dust; (4) carrying out a reduction reaction for screened abrasive dust at a reducing atmosphere, and obtaining the regenerated alloy powder. The method has the characteristics of easily available raw material, low price; simple process operation, low treatment cost; non-secondary pollution, low recycle cost, energy saving and environmental protection; the particle size of the regenerated alloy powder is about 40-60 micrometers, and the impurity clearance reaches to 99.5%, and the sulfur content is lower than 0.011%; the recovery rate of valuable metal recovery in the regenerated alloy is greater than 96%; the method has the characteristics of high impurity clearance and high alloy recovery rate.

Description

technical field [0001] The invention relates to a method for recovering grinding debris of a roll, in particular to a method for recovering the grinding debris of a fibrous roll. Background technique [0002] Every iron and steel enterprise has a grinding roll workshop, which produces a large amount of roll grinding debris every day. Different roll workshops require different grinding wheels due to different roll materials. Therefore, different wear forms will produce different types of grinding debris. Common types There are fibrous, flake and powder particles. The above-mentioned wastes are extremely difficult to separate, purify and comprehensively utilize due to their fine particles and non-metallic impurities (grinding wheel debris) and oil contamination. At present, the practice of some iron and steel enterprises is to return these roll grinding debris to sintering and reuse, or directly discharge them as waste, which results in the waste of various rare alloying elem...

AI Technical Summary

Problems solved by technology

The above-mentioned wastes have brought great difficulties to separation, purification and comprehensive utilization due to their fine particles and containing non-metallic impurities (grinding wheel debris) and oil stains.

At present, the practice of some iron and steel enterprises is to return these roll grinding scraps to sintering for reuse, or to discharge them directly as waste, resulting in the waste of a variety of rare alloy elements, and the discharged waste has caused serious pollution to the environment.