Waste treatment method

A treatment method and waste technology, applied in the field of environmental governance, can solve the problems of not being able to treat waste at the same time, not being able to deal with sludge containing copper and nickel, and having a single treatment object

Inactive Publication Date: 2013-10-30

LIANYUNGANG RONGDING METAL

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AI-Extracted Technical Summary

Problems solved by technology

However, the treatment cost of this method is high, and it cannot treat a large amount of waste at the...

Abstract

The invention provides a method for treating electronic waste or copper-nickel sludge -containing waste by means of metallurgical technology. The method comprises the following steps of: performing pretreatment for the waste; evenly mixing and stirring 15%-30% of pretreated waste, 5%-10% of curing agent and copper powder with total copper content of 25%-35% to prepare a 'waste brick', and solidifying and drying the 'waste brick'; and smelting the waste brick in a smelting furnace. In comparison with the prior art, in the method provided by the invention, the harmful wastes containing the copper-nickel sludge, the circuit boards, the connection wires, and the like, are treated simultaneously, the metal resource substances, such as copper, nickel and noble metal, in the material are recycled, the organic ingredients crack and burn, and other ingredients are converted into steady broken glass.

Application Domain

Solid waste disposalProcess efficiency improvement

Technology Topic

Waste treatmentNickel +9

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Examples

Experimental program(3)

Example Embodiment

[0021] Example 1: Waste bricks with a total copper content of 25%

[0022] 1. Process for preparing waste bricks:

[0023] a) Ingredients: 20% copper content of electronic waste and copper-nickel sludge with a particle size of 30mm or less, 8% curing agent (lime: cement: water glass = 8:15:10);

[0024] b) Mix 5% copper powder with the above raw materials according to the above ratio;

[0025] c) Brick making: the mixed raw materials are made into "waste bricks" manually or mechanically;

[0026] d) Drying: Place the finished product in a cool place to dry and solidify naturally to form a "waste brick" with compressive strength;

[0027] 2. Furnace smelting process:

[0028] Put dry and solidified waste bricks with compressive strength into the smelting furnace for smelting. When the temperature in the smelting furnace is 1100℃, after 3 hours of smelting, the sludge, circuit boards, connecting wires and other hazardous industrial wastes are converted into stable glass slag Reuse, and at the same time recover metal resource substances such as copper, nickel, and precious metals contained in the materials.

Example Embodiment

[0029] Example 2: Waste bricks with a total copper content of 30%

[0030] 1. Process for preparing waste bricks:

[0031] a) Ingredients: 15% copper content of electronic waste and copper-nickel sludge with a particle size of 30mm or less, 5% curing agent (lime: cement: water glass = 5:20:10);

[0032] b) According to the above ratio, mix 15% copper powder with the above raw materials evenly;

[0033] c) Brick making: the mixed raw materials are made into "waste bricks" manually or mechanically;

[0034] d) Drying: Place the finished product in a cool place to dry and solidify naturally to form a "waste brick" with compressive strength

[0035] 2. Furnace smelting process:

[0036] Put dry and solidified waste bricks with compressive strength into a smelting furnace or blast furnace for smelting. When the temperature in the smelting furnace is 1300℃, after 2.5 hours of smelting, the sludge, circuit boards, connecting wires and other hazardous industrial wastes are transformed into stable The glass slag is reused, and metal resource substances such as copper, nickel, and precious metals contained in the materials are recovered.

Example Embodiment

[0037] Example 3: Waste bricks with a total copper content of 35%

[0038] 1. Process for preparing waste bricks:

[0039] a) Ingredients: 30% copper content of electronic waste and copper-nickel-containing sludge with a particle size of 30mm or less, 10% curing agent (lime: cement: water glass = 3:25:10);

[0040] b) Mix 5% copper powder with the above raw materials according to the above ratio;

[0041] c) Brick making: manually or mechanically mixing the raw materials into appropriate size "waste bricks";

[0042] d) Drying: Place the finished product in a cool place to dry and solidify naturally to form a "waste brick" with compressive strength

[0043] 2. Furnace smelting process:

[0044] Put dry solidified waste bricks with compressive strength into a smelting furnace or blast furnace for smelting. When the temperature in the smelting furnace is 1400 ℃, after 2 hours of smelting, the sludge, circuit boards, connecting wires and other hazardous industrial wastes are converted into stable glass After the slag is reused, the metal resources such as copper, nickel, and precious metals contained in the materials are recovered at the same time.

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Description & Claims & Application Information

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