阅读说明：本技术 一种利用废旧线路板回收制备纳米铜材料的方法 (Method for preparing nano copper material by recycling waste circuit board ) 是由 刘达标 于 2021-09-14 设计创作，主要内容包括：本发明涉及复合材料制备技术领域,具体涉及一种利用废旧线路板回收制备纳米铜材料的方法,包括如下步骤：清理废旧电路板表面上的杂质,直至废旧电路板表面洁净,使用第一破碎机将废旧电路板破碎为1～1.5cm的碎块,使用第二破碎机将碎块破碎为0.5～0.6mm的细块,使用第三破碎机将细块破碎为0.1mm的颗粒,使用分选机分选出颗粒中的铜和树脂,利用淬火反应将分选机分选出的铜制作为纳米铜粉,将纳米铜粉进行压实,将压实后的纳米铜粉进行烧结成型,得到纳米铜材料,制出的纳米铜材料具有纯度高、性能好的特点,实现了提高后续产品的质量。(The invention relates to the technical field of composite material preparation, in particular to a method for preparing a nano copper material by recycling waste circuit boards, which comprises the following steps: the method comprises the steps of cleaning impurities on the surface of the waste circuit board until the surface of the waste circuit board is clean, crushing the waste circuit board into 1-1.5 cm fragments by using a first crusher, crushing the fragments into 0.5-0.6 mm fine blocks by using a second crusher, crushing the fine blocks into 0.1mm particles by using a third crusher, sorting copper and resin in the particles by using a sorting machine, using copper sorted by the sorting machine as nano copper powder by quenching reaction, compacting the nano copper powder, and sintering and molding the compacted nano copper powder to obtain the nano copper material.)

1. A method for preparing a nano copper material by recycling waste circuit boards is characterized by comprising the following steps:

cleaning impurities on the surface of the waste circuit board until the surface of the waste circuit board is clean;

crushing the waste circuit board into particles;

sorting out copper and resin in the particles by using a sorting machine;

preparing the nano copper material.

2. The method for preparing copper nano-materials by utilizing the waste circuit boards for recycling as claimed in claim 1, wherein in the step of cleaning the impurities on the surfaces of the waste circuit boards until the surfaces of the waste circuit boards are clean:

and cleaning impurities on the surface of the waste circuit board by using flexible cloth.

3. The method for preparing copper nanomaterial by recycling waste circuit boards according to claim 1, wherein in the step of crushing the waste circuit boards into particles, the crushing step is as follows:

crushing the waste circuit board into 1-1.5 cm fragments by using a first crusher;

crushing the fragments into fine blocks of 0.5-0.6 mm by using a second crusher;

the fine pieces were crushed to 0.1mm of the granules using a third crusher.

4. The method for preparing the nano copper material by utilizing the waste circuit board recovery as claimed in claim 1, wherein in the step of preparing the nano copper material, the preparation process is as follows:

the copper sorted by the sorting machine is made into nanometer copper powder by quenching reaction;

compacting the nano copper powder;

and sintering and molding the compacted nano copper powder.

5. The method for preparing the nano copper material by utilizing the waste circuit board recovery as claimed in claim 4, wherein in the step of compacting the nano copper powder:

the compaction pressure is 500 MPa.

6. The method for preparing the nano copper material by utilizing the waste circuit board recovery as claimed in claim 4, wherein in the step of sintering and molding the compacted nano copper powder:

the sintering temperature is 200-400 ℃, and the sintering time is 2-3 h.

Technical Field

The invention relates to the field of composite material preparation, in particular to a method for preparing a nano copper material by recycling waste circuit boards.

Background

The circuit board enables the circuit to be miniaturized and visualized, and plays an important role in the batch production of fixed circuits and the optimization of the layout of electrical appliances; the nano copper is mainly used as a hot hydrogen generator, a gel propellant, a combustion active agent, a catalyst, a water cleaning adsorbent, a sintering active agent, an antibacterial agent and the like.

A. At present, nano copper materials are recycled and prepared from waste circuit boards, so that the waste circuit boards are recycled, the recycling rate of the waste circuit boards is improved, but the recycling effect of the nano copper materials prepared by recycling the waste circuit boards is poor, and the quality of subsequent products is influenced.

Disclosure of Invention

The invention aims to provide a method for preparing a nano copper material by utilizing waste circuit boards in a recycling way, and aims to solve the technical problems that the recycling effect is poor and the quality of subsequent products is influenced in the prior art.

In order to achieve the purpose, the method for preparing the nano copper material by recycling the waste circuit board comprises the following steps:

cleaning impurities on the surface of the waste circuit board until the surface of the waste circuit board is clean;

crushing the waste circuit board into particles;

sorting out copper and resin in the particles by using a sorting machine;

preparing the nano copper material.

Wherein, in the step of clearing up the impurity on the surface of the waste circuit board until the surface of the waste circuit board is clean: and cleaning impurities on the surface of the waste circuit board by using flexible cloth.

Wherein, in the step of smashing waste circuit board to granule, the crushing step is:

crushing the waste circuit board into 1-1.5 cm fragments by using a first crusher;

crushing the fragments into fine blocks of 0.5-0.6 mm by using a second crusher;

the fine pieces were crushed to 0.1mm of the granules using a third crusher.

Wherein, in the step of preparing the nano copper material, the preparation process is as follows:

the copper sorted by the sorting machine is made into nanometer copper powder by quenching reaction;

compacting the nano copper powder;

and sintering and molding the compacted nano copper powder.

Wherein, in the step of compacting the nano copper powder:

the compaction pressure is 500 MPa.

Wherein, in the step of sintering and molding the compacted nano copper powder:

the sintering temperature is 200-400 ℃, and the sintering time is 2-3 h.

The invention has the beneficial effects that: firstly, cleaning impurities on the surface of a waste circuit board by using flexible cloth until the surface of the waste circuit board is clean, reducing the impurities on the waste circuit board, avoiding impurities in subsequent copper and resin to influence the product quality, then crushing the waste circuit board into particles, then collecting metal powder and resin powder in the particles, sorting the metal powder and the resin powder by using a sorting machine, thereby improving the recovery rate of the waste circuit board, then sorting the copper and the resin in the particles by using the sorting machine, adding the metal powder into the copper, adding the resin powder into the resin, then preparing a nano copper material, and finally obtaining the nano copper material The characteristic of good performance realizes improving the quality of follow-up products.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a flow chart of the steps of the method for preparing nano copper materials by recycling waste circuit boards according to the invention.

Fig. 2 is a flow chart of the steps of crushing the waste circuit boards into particles according to the invention.

Fig. 3 is a flow chart of the steps of preparing nano-copper material according to the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

Referring to fig. 1 to 3, the present invention provides a method for preparing a copper nanomaterial by recycling a waste circuit board, comprising the following steps:

s1: cleaning impurities on the surface of the waste circuit board by using flexible cloth until the surface of the waste circuit board is clean;

s2: crushing the waste circuit board into particles;

s3: collecting metal powder and resin powder in the particles, and sorting the metal powder and the resin powder by using a sorting machine;

s4: separating copper and resin in the particles by using a separator;

s5: adding the metal powder to the copper, adding the resin powder to the resin;

s6: preparing the nano copper material.

In the embodiment, firstly, the flexible cloth is used for cleaning impurities on the surface of the waste circuit board until the surface of the waste circuit board is clean, the impurities on the waste circuit board are reduced, the follow-up copper and resin containing impurities are prevented from affecting the product quality, then the waste circuit board is crushed into particles, then the metal powder and the resin powder in the particles are collected, a sorting machine is used for sorting the metal powder and the resin powder, so that the recovery rate of the waste circuit board is improved, then the sorting machine is used for sorting the copper and the resin in the particles, then the metal powder is added into the copper, the resin powder is added into the resin, then the nano copper material is prepared, and finally the nano copper material is obtained.

Further, in the step of crushing the waste circuit board into particles, the crushing step is:

s21: drying the waste circuit board;

s22: crushing the waste circuit board into 1-1.5 cm fragments by using a first crusher;

s23: crushing the fragments into fine blocks of 0.5-0.6 mm by using a second crusher;

s24: the fine pieces were crushed to 0.1mm of the granules using a third crusher.

In the embodiment, the waste circuit board is dried, the waste circuit board is crushed into 1-1.5 cm fragments by a first crusher, the fragments are crushed into 0.5-0.6 mm fine pieces by a second crusher, and the fine pieces are crushed into 0.1mm particles by a third crusher, and in the process, the metal powder and the resin powder adhered to the first crusher, the second crusher and the third crusher are respectively crushed, so that the recovery rate of the waste circuit board is improved.

Further, in the step of preparing the nano copper material, the preparation process is as follows:

s61: the copper sorted by the sorting machine is made into nanometer copper powder by quenching reaction;

s62: compacting the nano copper powder under the pressure of 500 MPa;

s63: and sintering and forming the compacted nano copper powder at the sintering temperature of 200-400 ℃ for 2-3 h.

In the embodiment, the copper and the metal powder separated by the separator are firstly made into the nano copper powder by quenching reaction, then the nano copper powder is compacted under the pressure of 500MPa, finally the compacted nano copper powder is sintered and formed at the sintering temperature of 200-400 ℃ for 2-3 h, and finally the nano copper material is obtained.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.