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A method for smelting pretreatment of waste circuit board multi-metal powder

A waste circuit board and multi-metal technology, which is applied in the field of smelting and pretreatment of waste circuit board multi-metal powder, can solve the problems of short processing process and loss of multi-metal powder, achieve simple and easy process, reduce copper content, avoid The effect of multi-metal powder oxidation

Inactive Publication Date: 2014-10-15
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is mainly to solve the problem of smelting pretreatment of waste circuit board multi-metal powder, not only to avoid the loss of multi-metal powder in the smelting process, but also to ensure the desired slag shape in the smelting process and the direct recovery rate of copper. The process has the advantages of The treatment process is short, the equipment is simple, and it is environmentally friendly.

Method used

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  • A method for smelting pretreatment of waste circuit board multi-metal powder

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Effect test

Embodiment 1

[0010] According to the design requirements, the waste circuit board polymetallic powder, adhesive, coal powder and water are mixed to obtain a mixed wet material, among which waste circuit board polymetallic powder: adhesive = 10:0.5 (mass), polymetallic powder: coal Powder = 10:0.15 (mass), polymetallic powder: water = 10:2 (mass), the binder is composed of bentonite and lime, silicon in the binder: calcium = 1.5:1 (mass); mix the wet material Put it into a briquetting machine to briquette to obtain a mixed block, the pressure of which is 0.3MPa; put the mixed block into a drying kiln for drying treatment to obtain a dried block, the drying treatment temperature is 100°C, and the drying time is The time is 12 hours; the dried block material is put into a smelting furnace for smelting to obtain copper slag and copper liquid, the copper slag is used for copper recovery treatment, and the copper liquid is cast into a copper anode plate. The copper slag rate is 9.5%, and the cop...

Embodiment 2

[0012] According to the design requirements, the waste circuit board polymetallic powder, adhesive, coal powder and water are mixed to obtain a mixed wet material, wherein the waste circuit board polymetallic powder: adhesive = 10:1 (mass), polymetallic powder: coal Powder = 10:0.25 (mass), polymetallic powder: water = 10:5 (mass), the binder is composed of bentonite and lime, silicon in the binder: calcium = 2.5:1 (mass); mix the wet material Put it into a briquetting machine to briquette to obtain a mixed block, the pressure of which is 0.8MPa; put the mixed block into a drying kiln for drying treatment to obtain a dried block, the drying treatment temperature is 150°C, and the drying time The time is 24 hours; put the dried block material into the smelting furnace for smelting to obtain copper slag and copper liquid, the copper slag is used for copper recovery treatment, and the copper liquid is cast into a copper anode plate. The copper slag rate is 9.7%, and the copper co...

Embodiment 3

[0014] According to the design requirements, the waste circuit board polymetallic powder, adhesive, coal powder and water are mixed to obtain a mixed wet material, among which waste circuit board polymetallic powder: adhesive = 10:0.8 (mass), polymetallic powder: coal Powder = 10:0.2 (mass), polymetallic powder: water = 10:3 (mass), the binder is composed of bentonite and lime, silicon in the binder: calcium = 2:1 (mass); mix the wet material Put it into a briquetting machine to briquette to obtain a mixed block, the pressure of which is 0.6MPa; put the mixed block into a drying kiln for drying treatment to obtain a dried block, the drying treatment temperature is 120°C, and the drying time is 16 hours; add the dried block material into the smelting furnace for smelting to obtain copper slag and copper liquid, the copper slag is used for copper recovery treatment, and the copper liquid is cast into a copper anode plate. The copper slag rate is 9.1%, and the copper content rate...

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Abstract

The invention relates to a pretreatment method for smelting waste circuit board polymetallic powder, which comprises the following steps: mixing waste circuit board polymetallic powder, adhesive, coal powder and water according to design requirements to obtain a mixed wet material, wherein the mass ratio of the waste circuit board polymetallic powder to the adhesive is 10:0.5-10:1, the mass ratio of the polymetallic powder to the coal powder is 10:0.15-10:0.25, the mass ratio of the polymetallic powder to the water is 10:2-10:5, the adhesive is composed of bentonite and lime, and the mass ratio of silicon to calcium in the adhesive is 1.5:1-2.5:1; adding the mixed wet material into a briquette press to obtain a mixed briquette material; adding the mixed briquette material into a drying kiln, and drying to obtain a dried briquette material; and adding the dried briquette material into a smelting furnace, and smelting to obtain copper dross and a copper solution, wherein the copper dross is subjected to copper recovery processing, and the copper solution is cast into an anode plate. Compared with the prior art, by taking comprehensive consideration on the aspects of production cost, smelting slag type and environmental protection, the invention is simple and easy to implement, and has the characteristics of common and cheap raw materials, simple equipment and the like.

Description

technical field [0001] The invention relates to a method for smelting and pretreating polymetallic powders of waste circuit boards, in particular to a method for pretreating polymetallic powders of waste circuit boards by an inorganic bonding method. Background technique [0002] Waste circuit board multi-metal powder is a multi-metal powder rich in copper, gold, silver, platinum, palladium, lead, tin, nickel, iron and aluminum obtained by crushing and sorting waste circuit boards, and its metal content reaches more than 95%. , extremely recycling value. In the industry, separation and purification processes such as smelting, electrolysis, and recovery of precious metals are usually used for recycling (Chinese invention patent ZL201010194555.6, international PCT patent PCT / CN2010 / 077935), therefore, multi-metal powders usually need to be smelted. The particle size of waste circuit board polymetallic powder obtained by different crushing and sorting processes is quite differ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B15/00C22B7/00B22F3/12
CPCY02P10/20
Inventor 潘德安张深根田建军李彬刘波郭斌
Owner UNIV OF SCI & TECH BEIJING
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