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Method for extracting rare earth component from crystal waste slag

A technology of waste residue and crystal, applied in the direction of improving process efficiency, can solve the problems of strong acid and alkali, large processing cost, secondary pollution, etc., and achieve the effects of high rare earth extraction purity, high rare earth recovery rate, and low processing cost.

Inactive Publication Date: 2011-11-23
JINHUA GUANHUA CRYSTAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are not suitable for the extraction of crystal waste slag with low rare earth content, which will consume a large amount of chemical substances such as strong acid and strong alkali, bring huge treatment costs, are not economical, and will also produce a large amount of saline wastewater, resulting in secondary secondary pollution

Method used

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  • Method for extracting rare earth component from crystal waste slag
  • Method for extracting rare earth component from crystal waste slag

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Take 50Kg of crystal waste residue, and carry out four-stage screening and classification through a 1m long vibrating screen, and use a pulping machine to adjust the waste residue of each fraction into a slurry with a concentration of 20%. 2 Gravity separation is carried out on a shaker of the specification, and the heavy component and the second-heaviest component are collected. The second-heaviest component is ground by a ball mill, and the average particle size of the grinding is 60 microns, and the pulping and gravity separation are performed again to collect the heavy component. After weighing, measuring, testing and sorting, the rare earth recovery rate is 85.5%, and the rare earth purity is 95.0%.

Embodiment 2

[0048] The gravity separation process is the same as in Example 1, except that the sieving and classification adopts three-stage classification. After weighing, measurement and test analysis: the rare earth recovery rate is 82.3%, and the rare earth purity is 85.4%.

Embodiment 3

[0050] The gravity separation process is the same as in Example 1, except that the coarse fractionation and classification equipment adopts a hydrocyclone. After weighing, measurement and test analysis: the rare earth recovery rate is 87.6%, and the rare earth purity is 95.2%.

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Abstract

The invention discloses a technique for extracting a rare earth component from waste slag from the crystal industry by using a reselection technique, in particular a method for separating rare earth from other components of crystal waste slag. The technical process of the technique comprises: coarsely selecting and grading the crystal waste slag, pulping the graded crystal waste slag, performing reselection and sorting by using reselecting equipment, separating to obtain a heavy component which is high-content rare earth polishing powder waste and a sub-heavy component which is rare earth-containing coexisting component, performing ball-milling and reselection and sorting to obtain a high-rare-earth-content component, wherein the high-rare-earth-content component can be regenerated to produce rare earth polishing powder or be used in other fields, so that the recycling of solid waste is realized. The invention provides a method for easily, practically and reliably extracting a rare earth component from crystal waste slag, which belongs to a physical separation method and is an environment-friendly, high-efficiency and low-cost treatment method.

Description

technical field [0001] The invention relates to a method for extracting rare earth components from waste crystal residue, which belongs to the field of environmental protection. Background technique [0002] The crystal industry takes crystal glass (usually high-lead glass) as the initial raw material, and processes it into various shapes of glass products with crystal characteristics through mechanical cutting, grinding, polishing and other means. Crystal glass has the characteristics of high transparency, high gloss, moderate weight, melodious sound, and easy molding and processing. Therefore, crystal glass products have the advantages of beautiful appearance, excellent texture, and affordable price. They are deeply loved by consumers and are widely used in High-end tableware, lighting, decoration, vases, ashtrays, ornaments and other decorations and handicrafts, such as rhinestones, have formed a huge crystal glass manufacturing industry. According to statistics, only in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B59/00
CPCY02P10/20
Inventor 雷华张序虎张甜甜鲁阳
Owner JINHUA GUANHUA CRYSTAL
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