Comprehensive recovery method for waste iron-based diamond tool

Abstract

The invention relates to a comprehensive recovery method for a waste iron-based diamond tool, and belongs to the technical field of comprehensive utilization of resources. The method comprises the following steps: using the waste iron-based diamond tool as an anode, using an inert material as a cathode, and using a solution containing ferrous ions as an electrolyte; carrying out recycling and electrolyzation under the condition that the pH value is 3-6; during the recycling and electrolyzation, obtaining a cathode sediment containing hydrogen and iron in a cathode area and obtaining anode mud containing diamond in an anode area, wherein the concentration of the ferrous ions in the electrolyte is 20-50 g / L, during the recycling and electrolyzation, the cathode-current density is controlled to be 200-500 A / m <2>, the cell voltage is controlled to be 2.0-4.5V, and the current efficiency is controlled to be 80-95%, the cathode sediment is directly utilized after being dried, smashed and restored, and the anode mud is directly utilized after being dried and separated. The comprehensive recovery method has the advantages of simple technology, easy operation, environmental protection, low cost, high product value and the like, and is suitable for popularization and application.

Description

technical field [0001] The invention relates to a method for comprehensively recycling waste iron-based diamond tools, belonging to the technical field of resource comprehensive utilization. Background technique [0002] Diamond is the hardest substance found in nature so far. It is widely used in geological drilling and hard and brittle substances, such as cutting, grinding and drilling of jewelry, stone, ceramics, hard alloys, semiconductor crystals, magnetic materials, etc. , because diamonds are all in the form of fine particles, they need to be made into tools with certain shapes and certain mechanical properties by using materials before they can be used. Diamond tools are tools of various types and specifications made of diamond as the abrasive and metal powder as the matrix through pressing and sintering processes. They are widely used in cutting, drilling, milling and other methods for stone, building materials, refractory materials, For the processing of hard and b...

AI Technical Summary

Problems solved by technology

[0006] The use of acid leaching process to reclaim waste diamond tools has the following defects: one, a large amount of toxic gases such as nitrogen monoxide and nitrogen dioxide will be produced in the acid leaching process, and it is easy to form acid mist; Recycling is carried out in the form of small workshops. Neither the awareness of environmental protection nor the level of technology can meet the current environmental protection requirements of our country. Most of the pollutants produced in the recycling process are secretly discharged without any environmental protection treatment, causing serious environmental pollution. Pollution problem; third, the value of the material recovered by the acid leaching process is low, which is mainly to recover the diamond contained in the discarded diamond tools, and the metal elements contained in the discarded diamond tools enter the leachate after acid leaching Exhaust, causing heavy metal ion pollution, at the same time, the resource value contained in it has not been effectively reflected

Images