Method for processing waste copper/iron-based diamond tool bit

A processing method and fund technology, which is applied in the field of effectively processing waste copper-iron-based diamond cutter heads, to achieve the effect of low labor intensity and environmental friendliness

Inactive Publication Date: 2014-09-17
CENT SOUTH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the shortcomings of the existing waste copper-iron-based diamond cutter head treatment method, the present invention provides a metallurgical method that can effectively separate and extract valuable metals in copper-iron-based diamond cutter heads, and the process is pollution-free

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  • Method for processing waste copper/iron-based diamond tool bit

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Embodiment 1

[0032] The main components of the diamond segment are (%) by mass percentage: Cu 26.80, Fe 69.97, Ag 0.60, and synthetic diamond 1.08. Industrial grade sulfuric acid, where H 2 SO 4 ≥98%; industrial grade iron powder, of which Fe≥98%; industrial grade hydrochloric acid, of which HCl≥36%; industrial grade hydrogen peroxide, of which H 2 o 2 ≥35%; industrial grade hydrazine hydrate, where N- 2 h 4 ·H 2 O≥40%.

[0033] When the copper ion concentration is 5g / L, H 2 SO 4 In the 19.50L electrolyte with a concentration of 1.75mol / L, place the anode frame and the stainless steel cathode respectively. Weigh 1808.0g of waste diamond cutter head and place it in the anode frame, connect it to direct current electrolysis, control the temperature of the electrolyte to 50°C, the distance between the cathode and the anode is 10mm, and control the cathode current density to 120A / m according to the effective area of ​​the cathode 2 . After 130 hours of electrolysis, the anode frame w...

Embodiment 2

[0038] The main components of the diamond segment are (%) by mass percentage: Cu 66.50, Fe 25.20, Ag 0.92, and synthetic diamond 1.25. Industrial grade sulfuric acid, where H 2 SO 4 ≥98%; industrial grade iron powder, of which Fe≥98%; industrial grade hydrochloric acid, of which HCl≥36%; industrial grade hydrogen peroxide, of which H 2 o 2 ≥35%; industrial grade hydrazine hydrate, where N- 2 h 4 ·H 2 O≥40%.

[0039] When the copper ion concentration is 10g / L, H 2 SO 4 In the 19.50L electrolyte with a concentration of 1.70mol / L, place the anode frame and the stainless steel cathode respectively. Weigh 2000.0g of waste diamond cutter head and place it in the anode frame, connect it to direct current electrolysis, control the temperature of the electrolyte to 50°C, the distance between the cathode and the anode is 10mm, and control the cathode current density to 120A / m according to the effective area of ​​the cathode 2 . After 142 hours of electrolysis, the anode frame ...

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Abstract

The invention provides a method for processing waste copper/iron-based diamond tool bit. The method comprises the following steps: firstly, electrochemically dissolving the waste diamond tool bit in a sulfuric acid system so that most part of copper and iron are dissolved into the solution, while silver, diamond and the like are enriched into anode mud; secondly, roasting and oxidizing the anode mud and then adding the oxidized anode mud to the sulfuric acid so that the residual most part of copper is dissolved; next, adding the rest undissolved copper, silver and diamond particles to the sulfuric acid solution of hydrogen peroxide for further oxidizing leaching, recovering the diamond particles which are not dissolved, precipitating the silver in the solution by use of the hydrochloric acid and reducing the hydrazine hydrate to generate simple substance silver powder; finally, after displacing copper with iron powder, concentrating and crystalizing the electrolyte to directly prepare iron sulfate heptahydrate. The recovery rate of the copper is above 96%, while the recovery rate of the diamond particles and the silver is above 99%; the industrial-grade iron sulfate heptahydrate is directly produced, the recovery rate of iron is greater than 98%, closed-loop circulation can be realized, the production labor intensity is low and the method is environmental friendly.

Description

technical field [0001] The invention relates to a hydrometallurgical process in the field of metallurgy, in particular to a method for effectively treating waste copper-iron-based diamond cutter heads. Background technique [0002] The diamond segment is the main body of the diamond saw blade, widely used in stone processing, mainly composed of diamond particles and matrix binder. The diamond particles in the cutter head are a kind of superhard material, which mainly plays a cutting role; the matrix binder is to protect the diamond particles from falling off prematurely. In order to increase the cutting effect of the diamond segment and prolong its service life, for different cutting objects, matrix materials composed of different metals are often used, which can be divided into iron-based, copper-based and cobalt-based according to the content of the main metal. , Ni-based and other carcass materials. At present, the carcass material composed of copper and iron as the mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C25C5/02C01B31/06
CPCY02P10/20
Inventor 杨天足张杜超刘伟锋陈霖饶帅肖庆凯郝占东
Owner CENT SOUTH UNIV
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