Method for extracting silicon carbide micro powder and diesel oil fuel

Abstract

The invention discloses a method for extracting silicon carbide micro powder and diesel oil fuel, belongs to preparation of silicon carbide, and particularly relates to resource recycle of waste sand generated in a quartz crystal electronic element processing process. The method is characterized in that: waste oil sand generated in the quartz crystal wafer cutting, grinding and polishing processes is used as a raw material, the method for extracting the diesel oil fuel comprises the steps of vacuum evaporation, condensation and filtration; and the method for extracting the silicon carbide micro powder comprises the steps of crushing, screening, acid washing, alkali washing, iron removing treatment, hydraulic overflow grading, finished product drying and ultrasonic screening. The invention provides the method for extracting the silicon carbide micro powder and the diesel oil fuel by using the waste oil sand generated in the quartz crystal cutting, grinding, polishing and processing processes as a raw material. Therefore, precious resources in the waste sand generated in the silicon crystal electronic element processing process are recycled, the resources are saved, the environment is protected, wastes are changed into valuables, and the method is favorable for the state, people and enterprises. The SiC content of the extracted silicon carbide micro powder is more than or equal to 99.5 percent, and the extracted diesel oil fuel is suitable for being used by internal-combustion engines.

Description

technical field [0001] The invention relates to a method for extracting silicon carbide micropowder and fuel diesel. It belongs to the preparation of silicon carbide. In particular, it relates to the resource recovery and utilization of waste sand produced during the processing of silicon crystal electronic components. Background technique [0002] In the era of digital circuits, sequential circuits can be described as the heart of digital circuits, and quartz components are indispensable key components of sequential circuits. Quartz components use the piezoelectric effect of quartz crystals to realize the functions of frequency generation, clock control and frequency filtering. The process of quartz crystal starts with quartz slices, after being ground and polished to the required size, metal film electrodes are vacuum-evaporated on the surface, and then wires and other packaging are connected. [0003] During the cutting, grinding and polishing process of quartz slices, ...

AI Technical Summary

Problems solved by technology

However, in the prior art, there is no method for extracting silicon carbide micropowder and fuel diesel oil from the waste oil sand produced during the cutting, grinding and polishing process of crystalline silicon as raw material.

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