TWI613281B - A modifier applied to waste containing copper - Google Patents

Abstract

The invention relates to a modifier for copper-containing waste, which comprises main components such as bismuth, aluminum and calcium, and the content of the above main components is converted into oxide weight percentage equivalent, and then cerium oxide, aluminum oxide and oxidation are generated. Calcium and other requirements, and the total weight percentage of these elements is between 50% and 95%; therefore, the modifier can be used for wastes containing residual small amounts of copper (such as waste glass fiber resin powder, waste sandblasting during surface treatment of ships) In the above, the modifier can react with the copper in the waste, thereby reducing the copper dissolution in the waste glass fiber resin powder, and promoting the reformed copper-containing waste to be reused and resourced. efficacy.

Description

Modifier for copper-containing waste

This invention relates to a modifier, and more particularly to a modifier for use in copper-containing waste.

Inspect, there are many copper-containing wastes, such as waste blasting of ship surface treatment process, or waste glass fiber resin powder produced by recycling of printed circuit boards.

Taking a printed circuit board as an example, the printed circuit board has been widely used in various electrical products, and the main material of the printed circuit board is a glass fiber epoxy resin board, and a general glass fiber epoxy resin board is used. The epoxy resin is used for bonding between the copper foil and the glass fiber cloth to form a sandwich plate whose appearance is bare copper, so the main components of the substrate are copper foil, glass fiber cloth and epoxy resin, and the substrate is processed by the inner layer ( Film, exposure, etching, black browning), pressing, drilling, electroplating (primary copper plating, secondary copper plating), outer layer processing (filming, exposure, development, etching, film removal), tin casting, gold plating and molding The processing procedure is to electroplate other metals on the copper foil layer of the substrate to form the required wiring, thereby completing the production of the printed circuit board.

Still continuing the above, and when the printed circuit board follows the electrical equipment After the waste, the recycled PCB related resources, in addition to the precious metals such as gold, silver, platinum and other palladium materials, the remaining waste glass fiber resin powder after processing, due to the current domestic no effective method will be scrapped The glass fiber resin powder is recycled and reused, so it can only be sent to the landfill for treatment. In addition to the processing cost, in addition, the waste glass fiber resin powder after burying is not easily decomposed in nature, even If it is thrown away at will, it will cause the possibility of heavy metal dissolution, or if it is burned by improper incineration, it will cause secondary pollution of the environment, and through the natural food chain relationship, it will cause serious damage to human health in the future.

Therefore, an object of the present invention is to provide a modifier for use in a copper-containing waste, which can stably reduce the elution of copper in the waste, so that the waste can be reused and the resource treatment effect can be achieved.

Therefore, the present invention is applied to a copper-containing waste modifying agent, which comprises main components such as barium, aluminum and calcium, and the total content of the above main components is converted into an oxide weight percentage equivalent, and the total amount of cerium oxide, aluminum oxide and calcium oxide is converted. The weight percentage is between 50% and 95%; therefore, when there is a small amount of copper containing copper waste, such as waste glass fiber resin obtained after recycling of printed circuit boards, waste sandblasting left by sandblasting on the surface of the ship, etc. Directly adding the modifier to the copper-containing waste, and mixing the modifier with the copper-containing waste, thereby reducing copper ion elution in the copper-containing waste, and promoting the copper-containing waste Subsequent material can be reused, and the copper-containing waste is converted into a capital The source material can effectively achieve the effect of resource utilization.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a graph showing the results of an experiment of Experimental Example 1 of the present invention.

Fig. 2 is a graph showing the results of an experiment of Experimental Example 2 of the present invention.

Fig. 3 is a graph showing experimental results of Experimental Example 3 of the present invention.

Fig. 4 is a graph showing the results of an experiment of Experimental Example 4 of the present invention.

The above and other technical contents, features, and advantages of the present invention will become apparent from the Detailed Description of the <RTIgt;

Referring to Figure 1, in a preferred embodiment of the present invention, the modifier of the present embodiment is used on a copper-containing waste, which may be waste sandblasting generated by a ship surface treatment process, or by a printed circuit board. The waste glass fiber resin powder produced by the recycling process, especially if the copper content is less than 5% by weight, the waste treatment effect is better; and the above-mentioned treatment agent for treating the copper-containing waste contains bismuth, The main components such as aluminum and calcium, and the content of the above main components are converted into oxide weight percentage equivalents, and then the elements such as cerium oxide, aluminum oxide and calcium oxide are produced, and the total weight percentage of the elements is between 50% and 95%; Furthermore, when the modifier is used, it is blended with the copper-containing waste, and the blending ratio may be between 10% and 30%: 70% to 90%, and the modifier is added directly through the a modifier is added to the copper-containing waste and the The modifier can be mixed with the copper-containing waste, so that the modifier can react with the copper in the waste, thereby reducing the dissolution of copper ions in the waste glass fiber resin powder, and achieving the modified content. The recycling effect of copper waste can be resourced.

In order to highlight the effects of the present invention and the feasibility of the present invention, the following experimental examples are proposed to demonstrate that the modifier of the present invention can achieve a reduction in the dissolution of heavy metals (copper dissolution rate):

Experimental example 1:

Referring to FIG. 1 , firstly, the modifier uses yttrium oxide, aluminum oxide, calcium oxide and the like, and the total weight percentage of the elements is 95%, which is added to the waste glass fiber resin powder recovered by the printed circuit board, and is also used. That is, the types listed in the following table:

The above modifier is mixed with the waste glass fiber resin powder in the above-mentioned different ratios, and 100 g of the mixture is taken as an example, according to the toxicity characteristic dissolution procedure of the Republic of China business waste (NI EA R201.14C, heavy metal eluted copper content) After the test, it was found that the dissolution rates of copper were 387.6 mg/L, 220.6 mg/L, 8.4 mg/L, 6.3 mg/L, and 4.8 mg/L, respectively. It is known that the modifier used in the experiment can effectively reduce the copper elution effect, and further, if the modifier is used in an amount of 10% or more, It is more in line with the domestic standard for the dissolution of copper in hazardous metal business wastes (15 mg/L), so that the waste glass fiber resin powder has a resource utilization effect that can be reused.

Experimental example 2

Referring to FIG. 2, the modifier uses yttrium oxide, aluminum oxide, calcium oxide and the like, and the total weight percentage of the elements is 86%, which is added to the waste glass fiber resin powder recovered by the printed circuit board, that is, as follows Types listed in the table:

The above modifier is mixed with the waste glass fiber resin powder in the above-mentioned different ratios, and 100 g of the mixture is taken as an example, according to the toxicity characteristic dissolution procedure of the Republic of China business waste (NI EA R201.14C, heavy metal eluted copper content) After the test, it was found that the dissolution rates of copper were 387.6 mg/L, 199.6 mg/L, and 95.5 mg/L, respectively, which were not detected and not detected, and the modification was not added. Compared with the agent, the modifier used in this experiment can effectively reduce the copper dissolution effect, and further, if the modifier is used, 15% When it is more in line with the standard value (15mg/L) of the copper dissolution of the domestic hazardous metal business waste, the ND amount (undetected amount) can be achieved, so that the waste glass fiber resin powder can be reused. Resourceization effect.

Experimental example three:

Referring to FIG. 3, the modifier uses yttrium oxide, aluminum oxide, calcium oxide and the like, and the total weight percentage of the elements is 52%, which is added to the waste glass fiber resin powder recovered by the printed circuit board, that is, as follows Types listed in the table:

The above modifier is mixed with the waste glass fiber resin powder in the above-mentioned different ratios, and 100 g of the mixture is taken as an example, according to the toxicity characteristic dissolution procedure of the Republic of China business waste (NI EA R201.14C, heavy metal eluted copper content) After the test, it was found that the dissolution rates of copper were 387.6 mg/L, 335.9 mg/L, 282.3 mg/L, 2.0 mg/L, and 4.1 mg/L, respectively. Compared with the modifier, the modifier used in this experiment can effectively reduce the copper dissolution effect. Further, if the modifier is used at 15%, it can better meet the domestic hazardous metal business waste. The standard value of copper dissolution is less than 15 mg/L, so that the waste glass fiber resin powder can be reused. effect.

Experimental example four:

Referring to Fig. 4, the modifier uses yttrium oxide, alumina, calcium oxide and the like, and the total weight percentage of the elements is 52%, and is used on the waste blasting of the ship surface treatment process, that is, the types listed in the following table. state:

The above modifier and the waste blasting are mixed in the above-mentioned different ratios, and 100 g of the mixed granules are taken as an example, and the toxic characteristic dissolution procedure (NI EA R201.14C, heavy metal eluted copper content) of the Republic of China business waste is tested. After the test, it was found that the dissolution rates of copper were 419.2 mg/L, 182.2 mg/L, 3.3 mg/L, 9.1 mg/L, and 9.3 mg/L, respectively, and the modifier was not added. In contrast, the modifier used in this experiment can effectively reduce the copper dissolution effect. Further, when the modifier is used at 10%, it is more compatible with the domestic hazardous metal business waste copper dissolution. Since the standard value (15 mg/L) or less is used, the waste blasting has a resource utilization effect that can be reused.

In summary, the present invention is applied to a copper-containing waste modifying agent, which can be used for waste containing residual small amount of copper (for example, waste glass fiber resin powder, ship) The surface treatment process is abandoned on the blasting sand, which is directly added into the copper-containing waste through the modifier, and the modifier can be mixed with the copper-containing waste, and the modified agent can pass the waste agent The copper in the solution reacts to reduce the elution of copper ions in the waste glass fiber resin powder, so that the modified copper-containing waste can be reused correctly and safely, thereby effectively achieving the resource utilization effect.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the description of the invention. All should remain within the scope of the invention patent.

Claims (2)

A modifier for copper-containing waste, the modifier comprising strontium, aluminum and calcium components, wherein the content of the above components is converted to an oxide weight percent equivalent, and the total weight percentage of cerium oxide, aluminum oxide and calcium oxide is between 50%~95%; wherein the copper-containing waste is waste glass fiber resin powder produced by the printed circuit board recycling process; and the blending weight percentage of the modified agent and the copper-containing waste is 10%~30 %: 70%~90%, the modifier is directly added to the copper-containing waste for mixing. The modifier for use in copper-containing waste according to claim 1 of the scope of the patent application, wherein the copper-containing waste has a copper content of less than 5% by weight.