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A method for efficiently recovering multiple valuable substances from waste diamond segment raw materials

A technology for diamond cutter heads and raw materials, which is applied in the field of efficient recovery of various valuable substances, can solve the problems of large difference in conductivity of waste diamond cutter heads, low electrolysis efficiency of waste diamond cutter heads, and complex composition of waste diamond cutter heads. The effect of improving copper melting efficiency, low production cost and high degree of automation

Active Publication Date: 2020-11-27
JIANGXI YIYUAN REGENERATION RESOURCE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex composition of waste diamond tips and large differences in composition, it is difficult to obtain stable cathode products by electrolysis
The electrical conductivity of the waste diamond segment varies greatly and the shape is irregular, which makes the electrolysis efficiency of the waste diamond segment low
The electrolysis method cannot be widely used due to high energy consumption, large investment in equipment, and poor process adaptability.

Method used

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  • A method for efficiently recovering multiple valuable substances from waste diamond segment raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: See figure 1 , the present invention provides a technical solution: a method for efficiently recovering multiple valuable substances from waste diamond cutter head raw materials, characterized in that it comprises the following steps:

[0027] S1. Raw material pretreatment: Under normal temperature and pressure, use a sodium hydroxide solution with a concentration of 50g / L in a rotary washing machine to pretreat the waste diamond segment raw material to remove impurities such as sediment and grease on the surface of the raw material. After the raw materials are cleaned, the solid-liquid separation is realized through a sieving machine. The products on the screen enter the rotary rinse liquid tank and are rinsed with clean water. After rinsing, the raw materials enter the acid leaching reactor for the first acid leaching.

[0028] S2, the first acid leaching: the first acid leaching is carried out on the pretreated raw materials obtained in S1, the liquid-soli...

Embodiment 2

[0037] Embodiment 2: collect the waste diamond cutter head raw material from the main granite production areas in the country, and find after analysis that the main valuable substances in the waste diamond cutter head raw material include diamond, tungsten carbide and copper, cobalt, nickel, zinc, iron, tin and other elements. Through a large number of exploratory tests, a process for recovering the above-mentioned valuable substances is proposed, and then the feasibility of the process is verified through small-scale laboratory tests, and then industrial tests are carried out.

[0038] Semi-industrial test:

[0039] Chemical analysis was carried out on the waste diamond cutter head raw materials, and the contents of the main valuable substances are shown in Table 1 below.

[0040] Table 1 The content of the main valuable substances in the waste diamond cutter head raw materials used in the semi-industrial test

[0041] components Fe Cu Zn diamond WC Cr ...

Embodiment 3

[0060] Industrial test:

[0061] The industrial test was carried out with 10 tons of waste diamond cutter head raw materials. The contents of the main valuable substances in the raw materials are shown in Table 3 below, and the experimental results are listed in Table 4.

[0062] Table 3 The content of the main valuable substances in the waste diamond cutter head raw materials used in industrial tests

[0063] components Fe Cu Zn diamond WC Cr sn other content / % 43.37 40.55 0.16 2.41 11.07 0.03 2.22 0.19

[0064] Table 4 Industrial test indicators

[0065] product / element Coarse diamond fine diamond Tungsten carbide copper tin iron Recovery rate / % 97.89 96.88 90.75 97.85 69.75 94.12

[0066] The industrial test results show that the method of the present invention is successfully industrialized and has achieved similar results to the semi-industrial test. The process described in this method can e...

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Abstract

The invention discloses a method for efficiently recovering multiple valuable substances from a waste diamond tool bit raw material. According to the method, various valuable substances in the low-chromium waste diamond tool bit raw material with relatively simple composition can be economically, efficiently and environmentally-friendly recycled. The method comprises the following steps: directlyleaching iron by using dilute sulphuric acid under normal pressure; crystallizing leachate to obtain a ferrous sulfate heptahydrate product; and introducing air into the dilute sulfuric acid solutionfrom residues obtained after primary leaching. By adopting an innovative nanometer cavitation device to introduce air into the dilute sulfuric acid solution under normal pressure, the dissolving speedof copper is increased more efficiently at a lower temperature and a lower sulfuric acid concentration compared with a common process; the leachate is filtered to obtain a tin mud product; the leaching residues are subjected to shaking-table reselection to obtain diamond and tungsten carbide products; the leachate is crystallized to obtain a copper sulfate pentahydrate product; and thus, step-by-step recovery of valuable substances is achieved. The method has the advantages that technological process is simple, a valuable substance recovery rate is high, production cost is low, an automationdegree is high, equipment requirements are low, and industrialization cost is low.

Description

technical field [0001] The invention relates to the technical field of waste cemented carbide recovery, in particular to a method for efficiently recovering various valuable substances from waste diamond cutter head raw materials. Background technique [0002] The diamond cutter head is the working body of the diamond saw blade, and the cutter head of the diamond saw blade is composed of diamond and matrix binder. Diamond is a superhard material, which acts as a cutting edge, and the carcass binder acts as a fixed diamond, which is composed of metal alloy powder or metal element powder. Diamond cutter heads are widely used, but about 10% to 15% of diamond cutter heads cannot be used in the later stage of use and are discarded. my country produces a considerable amount of waste diamond cutter heads every year. [0003] At present, there are mainly two methods for processing waste diamond bits: leaching and electrolysis. [0004] The leaching method is the most commonly used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B15/00C22B25/06C22B3/44C22B3/46C01B32/26C01B32/949
CPCC01B32/26C01B32/949C22B3/44C22B3/46C22B7/007C22B15/0071C22B15/0091C22B25/04C22B25/06Y02P10/20
Inventor 王金虎彭志兵张博张平熊先学王秋华
Owner JIANGXI YIYUAN REGENERATION RESOURCE CO LTD
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