Impurity removing process for rear earth feed liquid

A rare earth material liquid and process technology, which is applied in the field of rare earth material liquid impurity removal process, can solve the problems of solid waste, low grade, and rare earth loss due to ineffective use of sodium sulfide method, and achieve continuous, improved processing speed, and impurity removal The effect of low processing cost

Inactive Publication Date: 2018-08-17
四川英创环保科技有限公司
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing extraction method and sodium sulfide method produce low-grade solid waste, which is no

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Impurity removing process for rear earth feed liquid
  • Impurity removing process for rear earth feed liquid

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0047] Example one

[0048] Take 2L of rare earth material liquid, and detect the content of each component in the rare earth material liquid as follows: H + 12g / L, REO120g / L, FeO1.5g / L, PbO1.1g / / L, Al 2 O 3 0.4g / L, CuO0.003gL, placed in a 3000ml beaker, adjusted PH=3.5 with ammonia water, obtained the adjusted value slag Z and the material liquid through solid-liquid separation, then returned the material liquid to the beaker, and adjusted the material liquid PH=2 with hydrochloric acid. Warm up to 45℃, add hydrochloric acid to make H + The concentration is 2g / L, add 4 pieces of 100*50*3mm aluminum pieces to react for 20 minutes, collect the sponge-like polymetallic enrichment on the surface of the material liquid, remove the aluminum pieces to clean the surface attachments of the aluminum pieces; use hydrochloric acid to adjust the material liquid H + =1.5g / L, put 4 pieces of aluminum sheet back into the material solution and add another piece of aluminum sheet, react for 30 minu...

Example Embodiment

[0049] Example two

[0050] Take 20L of rare earth material liquid, and detect the content of each component in the rare earth material liquid as follows: H + 12g / L, REO120g / L, FeO1.5g / L, PbO1.1g / / L, Al 2 O 3 0.4g / L, CuO0.003gL, placed in a 25L plexiglass tank, use ammonia to adjust PH=4, after solid-liquid separation, the material and liquid return to the plexiglass tank, the solid-liquid separation obtains the adjusted slag H and the material liquid, and then The material liquid is returned to the plexiglass tank, and the pH of the material liquid is adjusted to 1 with hydrochloric acid, and the temperature is raised to 50°C. + The concentration is 3.5g / L, add 5 pieces of 250*250*3mm aluminum sheet to react for 20 minutes, collect the sponge-like polymetallic enrichment on the surface of the material liquid, remove the aluminum sheet to clean the surface attachment of the aluminum sheet; use hydrochloric acid to adjust the material liquid H + = 2g / L, put 5 pieces of aluminum shee...

Example Embodiment

[0051] Example three

[0052] The content of each component in the rare earth material liquid is as follows: H + 12g / L, REO120g / L, FeO1.5g / L, PbO1.1g / / L, Al 2 O 3 0.4g / L, CuO0.003gL, add it to the reaction tank, use ammonia in the reaction tank to adjust PH=4.5, flocculate, clarify, plate and frame pressure filtration, feed liquid into another reaction tank, use hydrochloric acid to adjust pH=3 , The temperature is raised to 55℃, 2m 3 Effective volume of material and liquid introduction 2.5m 3 The replacement groove of PP material. Add 20 pieces of 1000*1000*5mm aluminum plates to the reaction tank, and add hydrochloric acid during the reaction of the aluminum plates for 20 minutes to ensure H + =2.5g / L, collect the spongy polymetallic enrichment on the surface of the material liquid, take out the aluminum sheet to clean the surface attachments of the aluminum sheet, and use hydrochloric acid to adjust the material liquid H + =1.5g / L, put the aluminum plate back into the material ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses an impurity removing process for rear earth feed liquid and belongs to the technical field of wet metallurgy. The impurity removing process for the rear earth feed liquid includes the following steps that (1) the rear earth feed liquid is preprocessed; (2) the rear earth feed liquid is subjected to three times of replacement in an independently controlled mode; (3) solid-liquid separation and collection of spongy multi-metal enriched products are carried out; (4) low-valence metal ions are subjected to oxidation treatment; and (5) an aluminum element and an iron elementin solid matter produced in the previous steps are solidified. The impurity removing process for the rear earth feed liquid has the beneficial effects that environment-friendly and high-efficiency impurity removing of the rear earth feed liquid is achieved, processing cost is low, higher safety is achieved, and the rear earth loss is less than 0.2% during displacement impurity removing of the rear earth feed liquid; and the lead content in the feed liquid is reduced to 0.005 g/L from 1-2 g/L, the iron content in the feed liquid is reduced to 0.004 g/L from 0.5-2 g/L, the copper content in thefeed liquid is less than 1 PPM after processing, silver, mercury and other trace metal elements capable of being replaced with metal aluminum in the feed liquid can be enriched, the content of sodiumions in the feed liquid is reduced, and the processing difficulty of waste water is reduced.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a rare earth material liquid impurity removal process. Background technique [0002] Currently, there are two mainstream methods for purifying rare earth liquid in the rare earth industry: [0003] 1. Extraction method: that is, the rare earth material liquid is extracted with an extractant (P204 or P507), and the rare earth enters the organic phase and non-rare earth impurities remain in the water phase. Then the water phase needs to be treated with chemical reagents because it contains elements such as lead and copper to produce solid waste and saline wastewater; [0004] 2. Sodium sulfide method: Add sodium sulfide to the rare earth material liquid under the condition of PH=4, so that lead, copper and other elements form black sulfide and remove it by filtration. Disadvantages of the sodium sulfide method: when sodium sulfide is added, hydrogen sulfide ga...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22B3/46C22B3/42C22B59/00
CPCC22B3/42C22B3/46C22B59/00Y02P10/20
Inventor 不公告发明人
Owner 四川英创环保科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap