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Method for recovering multiple valuable substances from waste diamond tool bit raw materials

A diamond cutter head and raw material technology, applied in the field of waste cemented carbide recycling, can solve the problems of poor process adaptability, large equipment investment, irregular shape, etc., and achieve the effects of increased oxidation leaching speed, high degree of automation, and increased oxidation potential

Active Publication Date: 2020-04-10
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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  • Method for recovering multiple valuable substances from waste diamond tool bit raw materials
  • Method for recovering multiple valuable substances from waste diamond tool bit raw materials
  • Method for recovering multiple valuable substances from waste diamond tool bit raw materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: See figure 1 , the present invention provides a technical solution: a method for recovering multiple valuable substances from waste diamond cutter head raw materials, which includes the following steps:

[0031] S1. Raw material pretreatment: Under normal temperature and pressure, use a sodium hydroxide solution with a concentration of about 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, they pass through a sieving machine with a sieve hole of 4mm. 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.

[0032] S2, the first acid leaching: the first acid leaching is carried out on the raw materials treated in S1, the liquid-solid mass ratio is 2.5-3:1, so that relatively...

Embodiment 2

[0046] 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.

[0047] Semi-industrial test:

[0048] 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.

[0049] Table 1 The content of the main valuable substances in the waste diamond cutter head raw materials used in the semi-industrial test

[0050] components Fe Cu Ni co Zn diamond...

Embodiment 3

[0073] Industrial test:

[0074] 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.

[0075] Table 3 The content of the main valuable substances in the waste diamond cutter head raw materials used in industrial tests

[0076] components Fe Cu Ni co Zn diamond Tungsten carbide mn Cr sn other content / % 35.71 38.52 2.86 0.01 4.56 2.93 13.48 0.33 0.02 1.27 0.31

[0077] Table 4 Industrial test indicators

[0078]

[0079] The industrial test results show that the method of the present invention is successfully industrialized and has achieved results similar to the semi-industrial test. The process described in this method can efficiently reclaim the main valuable substances in the waste diamond cutter head raw material.

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Abstract

The invention discloses a method for recovering multiple valuable substances from waste diamond tool bit raw materials. The method can realize efficient economical and environmental-friendly recoveryof the multiple valuable substances in the waste diamond tool bit raw materials, and is particularly suitable for low-chromium raw materials with complex components. Iron, nickel, cobalt, zinc, chromium and other relatively easy-soluble metals are directly leached by dilute sulfuric acid at normal pressure, the leachate is crystallized to obtain a ferrous sulfate heptahydrate product, and productsof copper sulfide, zinc carbonate, cobalt carbonate and nickel sulfide are sequentially prepared from crystallization mother liquor, air is filled into a dilute sulfuric acid solution by adopting aninnovative nano cavitation device at normal pressure from residue leached for the first time, the dissolution speed of copper is obviously improved at lower temperature and sulfuric acid concentration, filtering and screening are performed to obtain products of diamond and tungsten carbide, the leachate is crystallized to obtain products of copper sulfate pentahydrate, and the valuable substancesare recovered step by step. The technological process is simple, the recovery rate of the valuable substances is high, the production cost is low, the automation degree is high, and industrial production can be realized.

Description

technical field [0001] The invention relates to the technical field of waste cemented carbide recovery, in particular to a method for 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 kind of superhard material, which acts as a cutting edge, and the carcass binder plays the role of fixing diamond. It is composed of tungsten, copper, nickel, cobalt and other metal single substance powder or metal alloy powder. The application of diamond segment is very extensive, but about 10%-15% of the diamond segment cannot be used in the later stage of use and is discarded. A considerable amount of waste diamond segment is produced every year in our country. [0003] At present, there are mainly two methods for processing waste diamond bits: leaching and el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B19/20C22B3/38C22B23/00C22B34/32C22B15/00C22B25/06C01B32/28C01B32/949C01G49/14
CPCC01G49/14C22B7/007C22B15/0071C22B15/0089C22B19/22C22B23/043C22B23/0461C22B25/04C22B25/06C22B34/32C01B32/28C01B32/949C22B3/3844C22B3/3846Y02P10/20
Inventor 彭志兵张博王金虎张平熊先学王秋华
Owner JIANGXI YIYUAN REGENERATION RESOURCE CO LTD
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