Environmentally-friendly separation method of metal chain teeth from waste and old zippers
A separation method and metal chain technology, which is applied in the field of separation of metal chain teeth of environmentally friendly waste zippers, can solve the problems of harmful health of workers, no good way for solvents, unfriendly environment, etc., and achieve good quality of metal chain teeth, It is convenient for secondary use and overcomes the effect of not being environmentally friendly
Active Publication Date: 2015-03-11
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
The dissolution method is a method of dissolving non-metallic parts such as cloth tapes and ribs with related solvents to obtain metals, but the organic solvents used in this method are generally poisonous and harmful to the health of workers, and the treatment of saturated solvents is also difficult. There is no good way yet; the burning method is to put the whole zipper directly into the combustion kettle and burn it to obtain metal. This method also has many shortcomings, mainly because it will cause a large amount of toxic gas discharge when burning the zipper , and the metal copper will turn black after burning, which will affect the secondary utilization
[0004] There are various shortcomings in the above two methods, and they are not friendly to the environment.
Method used
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[0021] Such as figure 1 Shown, the metal chain element separation method of environment-friendly waste slide fastener of the present invention comprises the following steps:
[0022] (1) Manually remove the zipper head of the waste zipper, leaving the cloth tape and the chain teeth on it;
[0023] (2) Put the cloth tape with the zipper head removed in step (1) into the cutting machine to cut, and the length of each cut is 3cm to 5cm;
[0024] (3) Adjust the gap between the two rolls of the mill and heat it;
[0025] (4) Put each piece of cloth tape with a cut length of 3cm to 5cm into the mill described in step (3) and heat press to complete the initial stripping of the chain teeth and the cloth tape;
[0026] (5) Pour the tape debris obtained in step (4) together with the chain teeth into the mixer for stirring to prepare for the next winnowing. The purpose is to better separate the chain teeth from the tape debris and prevent adhesion phenomenon;
[0027] (6) The tape sc...
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The invention discloses an environmentally-friendly separation method of metal chain teeth from waste and old zippers. The method comprises the following steps of 1, artificially taking out a zipper head of a waste and old zipper and retaining a cloth belt and chain teeth arranged on the cloth belt, 2, putting the cloth belt without the zipper head into a cut-off machine, carrying out cutting, and then carrying out hot-pressing in an open mill so that the chain teeth and the cloth belt are separated preliminarily, 3, pouring the cut cloth belt and the chain teeth into a blender, and carrying out stirring for next winnowing, and 4, carrying out winnowing of the stirred cloth belt and the chain teeth by a winnower to obtain the chain teeth on the cloth belt. Compared with the existing metal chain tooth extraction method adopting combustion and dissolution processes, the method provided by the invention has the advantages of good environmental benefits, no pollution, operation convenience, good separation effects and low cost and is an economic and practical method for separation of metal from waste and old zippers.
Description
technical field [0001] The invention relates to a process for recycling metal chain teeth of waste zippers, in particular to an environment-friendly method for separating metal chain teeth of waste and old zippers. Background technique [0002] The zipper industry is an important part of the garment industry. According to the data of relevant literature, the zippers exported by my country account for 60% of the world's total every year. Since most of the zipper teeth are made of copper, this has caused a large amount of copper resources to flow out of our country, so the chain teeth Copper recycling is becoming increasingly important. [0003] There are two common methods for separating metal in zippers in factories at present, namely dissolution method and combustion method. The dissolution method is a method of dissolving non-metal parts such as cloth tapes and ribs with related solvents to obtain metals, but the organic solvents used in this method are generally poisonou...
Claims
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IPC IPC(8): B09B3/00B09B5/00
Inventor 何和智黄照夏周卉青赵耀
Owner SOUTH CHINA UNIV OF TECH