Resource recovery method for waste gel-ink pen refills

Abstract

The invention provides a resource recovery method for waste gel-ink pen refills. The method is realized through the following steps: 1) the waste gel-ink pen refills are collected, are fed into a vacuum pyrolysis device, are heated to 500 DEG C, and are pyrolyzed by 30 min; organic matters in the waste gel-ink pen refills are pyrolyzed as micro molecular substances for volatilization from the vacuum pyrolysis device, and are condensed as pyrolysis oil; and pen point and carbon slag mixtures are remained in the vacuum pyrolysis device; 2) the pen point and carbon slag mixtures obtained in the step 1) and steel balls are fed in a vertical stirring ball mill according to a certain ratio for ball milling by 30-60 min; balls in pen points are separated out; and chromium plating layers on the surface layers of the pen points are stripped out; and 3) materials in the vertical ball mill are taken out; and iron and nickel substances in the materials are absorbed away by adopting magnets, and are screened to obtain ball and copper, chromium metal mixed powder. The method realizes high-value recovery of the organic matters and metal materials in the waste gel-ink pen refills.

Description

Technical field: [0001] The invention belongs to the field of secondary resource recovery and utilization, and in particular relates to a resource recovery method for waste gel pen cores. technical background: [0002] There is a large amount of waste gel pen refills discarded every year in our country. Statistics show that there are nearly 300 million students in our country at present, and based on the average per person using one pen refill per week, nearly 15 billion pen refills will be used in a year. Although the refill is small, the pollution cannot be ignored. If discarded at will, a large number of waste pen refills will not only cause a huge waste of resources, but also cause unexpected pollution to the environment and even affect people's health. [0003] The waste gel pen refill is composed of three parts: the pen tube of the gel pen refill is made of plastic, and the plastic injection molding technology is used. The main component of the pen tube is polystyre...

AI Technical Summary

Problems solved by technology

This method uses organic solvents to treat the refill residues, does not realize the recovery of organic plastics and metals, consumes a lot of solvents, and easily causes secondary pollution

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