Method and apparatus for modifying waste printed circuit board composite non-metal powder

Abstract

The invention relates to a wasted printed circuit board composite nonmetal powder modification method and a device. A modifying agent compounded by stearic acid and KH550 (silane coupling agent) is added into the wasted printed circuit board composite nonmetal powder; the mixture is sent to a high-speed modifying mixer; modification is conducted with the temperature of 100 DEG C to 130 DEG C; themodified powder is graded by a grader. The special devices of the modification method comprise the sequentially connected flour mill, cyclone separating device, double screw spiral feeder, modifying agent heating and measuring device, high-speed modifying mixer, grader, cyclone separating device, pulsed dust collector and tail gas treating column. The wasted printed circuit board composite nonmetal powder modified by the invention has good fraction effect after grading, does not agglomerate, has good compatibility with other materials, lowers the oil absorption value to 40 from 60, reduces 1 / 3 of the oil absorption value of the product and has good practical application effect.

Description

Technical field: [0001] The invention relates to the technical field of material processing, in particular to a material modification method and equipment of waste printed circuit board composite non-metallic powder (VT powder for short). Background technique: [0002] With the modernization of industry and agriculture and the advancement of science and technology, especially the rapid development of information technology, the replacement of electronic products has become more frequent, followed by piles of obsolete and scrapped electronic circuit boards, seriously affecting and destroying the ecological environment. . At present, there are many ways to deal with waste electronic circuit boards in the world, but the main purpose is to recover precious and rare metals in waste electronic circuit boards, such as copper, tin, nickel, gold, silver, etc.; Composite non-metal powder materials are huge and difficult to handle. Generally, small factories or individual enterprises ...

AI Technical Summary

Problems solved by technology

At present, there are many ways to deal with waste electronic circuit boards in the world, but the main purpose is to recover precious and rare metals in waste electronic circuit boards, such as copper, tin, nickel, gold, silver, etc.; Composite non-metal powder materials are huge and difficult to handle. Generally, small factories or individual enterprises do not have the conditions and technical strength to deal with these powders. The only way can only be to pile up or landfill, and most large enterprises or environmental protection processing centers are also The method of incineration is very serious to the pollution of soil, air and water resources, and it is also unfavorable to the recycling of resources;

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