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Method and system for collaborative smelting and recycling valuable metal from waste circuit board, scrap copper and copper-containing waste residue

A technology of waste circuit boards and valuable metals, which is applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of large waste liquid discharge, low product quality, and large acid and alkali consumption, and achieve recovery rate High, large quantity, no secondary pollution effect

Inactive Publication Date: 2018-06-15
CHINA GEZHOUBA GRP LVYUAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, most of these industrial electronic waste or solid waste recycling methods are single pyrolysis or single wet treatment process; the single pyrolysis treatment process has the characteristics of large processing capacity and obvious reduction effect, but it has the characteristics of large pollution and high product quality. The problem of low quality, while the single wet treatment process has the characteristics of good separation effect and high product quality, but there are problems of large waste liquid discharge and large acid and alkali consumption

Method used

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  • Method and system for collaborative smelting and recycling valuable metal from waste circuit board, scrap copper and copper-containing waste residue

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Embodiment approach

[0048] The invention adopts the combination of fire method and wet method to smelt waste circuit boards, waste miscellaneous copper and copper-containing waste slag, and comprehensively recycles and utilizes the valuable metals therein. In order to make full use of valuable metals in waste circuit boards, waste miscellaneous copper and copper-containing waste slag, such as figure 1 As shown, in the embodiment of the present invention, the three components are crushed and mixed at first, which can be crushed separately and then mixed, or mixed and then crushed. According to a preferred embodiment of the present invention, the mass ratio of the waste circuit board, waste miscellaneous copper and copper-containing waste slag is 1:3:6˜1:4:5. In the present invention, the mass ratio of waste circuit boards, waste miscellaneous copper and copper-containing waste slag is preferably controlled within the above-mentioned range, mainly because factors such as source and quantity of raw ...

Embodiment 1

[0074] Through the following steps, valuable metals such as copper, nickel, tin, iron, zinc, etc. are recovered comprehensively through collaborative smelting from waste circuit boards, waste miscellaneous copper, and copper-containing waste slag. The main components of waste circuit boards are: CuO 15%, NiO 2 %, SnO 2 4%, Fe 2 o 3 0.6%, ZnO 1%; the main components of scrap copper are: CuO 90%, NiO 0.05%, SnO 2 0.01%, Fe 2 o 3 0.25%, ZnO8%; the main components of copper-containing waste residue are: CuO 20%, NiO 1%, SnO 2 0.5%, Fe 2 o 3 15%, ZnO 0.2%.

[0075] 1) Take 100g of waste circuit boards, 300g of waste miscellaneous copper and 600g of copper-containing waste slag, crush and mix them evenly, with a mass ratio of 1:3:6, and place them in a high-temperature melting furnace at a melting temperature of 1100°C for 2 hours to obtain 507.73g of metal alloy grading 79.77% copper, 456.04g of slag and 36.23g of soot flue gas. After the flue gas is absorbed by the...

Embodiment 2

[0084] The selected waste circuit boards, miscellaneous copper waste and copper-containing waste slag are the same as in Example 1, and the main components are the same as above.

[0085] 1) Take 100g of waste circuit boards, 350g of waste miscellaneous copper and 550g of copper-containing waste slag, crush and mix them evenly, with a mass ratio of 1:3.5:5.5, and place them in a high-temperature melting furnace at a melting temperature of 1200°C for 1 hour to obtain 548.53g of metal alloy grading 80.21% copper, 408.32g of slag and 43.15g of soot flue gas. After the flue gas is absorbed by the NaOH solution with a mass concentration of 5%, the exhaust gas is obtained, which is colorless and odorless.

[0086] 2) Get 500g metal alloy to make anode sheet, then get 100g 99.99% pure copper to make cathode sheet, take the mixed solution of sulfuric acid and copper sulfate as electrolyte, copper concentration in electrolyte is 45g / L, sulfuric acid concentration is 180g / L L, the curr...

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Abstract

The embodiment of the invention discloses a method and system for collaborative smelting and recycling valuable metal from a waste circuit board, scrap copper and copper-containing waste residue. Themethod comprises the steps that the waste circuit board, the scrap copper and the copper-containing waste residue are mixed and are subject to high-temperature smelting to obtain a metal alloy and slag; an anode plate is made of a metal alloy, and through electrolysis, a cathode copper product is obtained; copper anode mud and slag are combined, and through sulfuric acid leaching, leaching liquidis obtained; the leaching liquid is subject to metal replacement, nickel tin powder is separated out, and through alloying smelting, and a nickel and tin alloy product is obtained; filter liquid replacement is carried out, through alkali deposition, ferric hydroxide is separated out, and through burning, a ferric oxide product is obtained; liquid obtained after sedimentation is subject to evaporative crystallization, and a heptahydrate product is obtained. According to the method, the fire method and wet method combined collaborative smelting manner is adopted, the treatment problem of the waste circuit board, the scrap copper and the copper-containing waste residue is solved, the waste source is wide, the cost is low, the obtained product is good in quality, the recycling rate is high, the environment friendly aim reaches the standard, no secondary pollution exists, and a certain economic benefit and the industrial significance are achieved.

Description

technical field [0001] The invention relates to the technical field of industrial solid waste recycling, in particular to a method and system for co-smelting and recovering valuable metals from waste circuit boards, waste miscellaneous copper and copper-containing waste slag. Background technique [0002] With the rapid development of the era of digitalization and information technology, electronic products are constantly being upgraded and updated. There are a large number of scrapped home appliances and electronic products on the market, and the number of scrap circuit boards is also rising rapidly. It has become the fastest growing industrial electronics. Waste is hazardous waste. A large amount of smelting slag is produced in the process of copper pyrometallurgy, such as matte blowing slag, copper anode slime and other copper-containing waste slag, most of which contain polluting elements and are also hazardous waste. The grade of waste miscellaneous copper is mostly ab...

Claims

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Application Information

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IPC IPC(8): C22B7/00C25C1/12C22B23/00C22B25/06
CPCC22B7/001C22B7/007C22B15/0028C22B23/043C22B23/0469C22B25/04C22B25/06C25C1/12Y02P10/20
Inventor 刘吉波杨涛李旭宁甘振昱潘嘉业
Owner CHINA GEZHOUBA GRP LVYUAN TECH CO LTD
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