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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
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  • 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 not effectively utilized and the loss of rare earth is large in the sodium sulfide method. The present invention provides a rare earth material liquid impurity removal process

Method used

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  • Impurity removing process for rear earth feed liquid
  • Impurity removing process for rear earth feed liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Get 2L rare earth feed liquid, detect the content of each component in this rare earth feed liquid as follows: H + 12g / L, REO120g / L, FeO1.5g / L, PbO1.1g / / L, Al 2 o 3 0.4g / L, CuO0.003gL, put in a 3000ml beaker, use ammonia water to adjust PH=3.5, separate the solid and liquid to obtain adjusted slag Z and feed liquid, then return the feed liquid to the beaker, use hydrochloric acid to adjust the feed liquid PH=2, Heat up to 45°C, add hydrochloric acid to make H + The concentration is 2g / L, add 4 pieces of 100*50*3mm aluminum flakes and react for 20 minutes, collect the spongy polymetallic enrichment on the surface of the feed liquid, take out the aluminum flakes and clean the attachments on the surface of the aluminum flakes; use hydrochloric acid to adjust the feed liquid H + = 1.5g / L, put 4 pieces of aluminum flakes back into the feed solution and add another piece of aluminum flake, react for 30 minutes, collect the spongy polymetallic enrichment on the surface of th...

Embodiment 2

[0050] Get 20L rare earth feed liquid, detect the content of each component in this rare earth feed 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, using ammonia water to adjust PH=4, after solid-liquid separation, the feed liquid is returned to the plexiglass tank, and the solid-liquid separation obtains the adjustment slag H and the feed liquid, and then Return the feed liquid to the plexiglass tank, adjust the pH of the feed liquid to 1 with hydrochloric acid, raise the temperature to 50°C, add hydrochloric acid to make the H + The concentration is 3.5g / L, add 5 pieces of 250*250*3mm aluminum flakes and react for 20 minutes, collect the spongy polymetallic enrichment on the surface of the feed liquid, take out the aluminum flakes and clean the attachments on the surface of the aluminum flakes; use hydrochloric acid to adjust the feed liquid H + =2g / L, put 5 pieces of aluminum flakes back into th...

Embodiment 3

[0052] Detect the content of each component in this rare earth feed liquid as follows: H + 12g / L, REO120g / L, FeO1.5g / L, PbO1.1g / / L, Al 2 o 3 0.4g / L, CuO0.003gL, add to the reaction tank, use ammonia water in the reaction tank to adjust PH=4.5, flocculation, clarification, plate and frame filter, the feed liquid enters another reaction tank, use hydrochloric acid to adjust the feed liquid PH=3 , heated to 55°C, the 2m 3 The effective volume of feed liquid introduction is 2.5m 3 Replacement tank made of PP material. Add 20 sheets of 1000*1000*5mm aluminum plates into the reaction tank, and add hydrochloric acid during the reaction of the aluminum plates for 20 minutes to ensure that the H + =2.5g / L, collect the spongy polymetallic enrichment on the surface of the feed liquid, take out the aluminum flakes and clean up the attachments on the surface of the aluminum flakes, and use hydrochloric acid to adjust the feed liquid H + =1.5g / L, put the aluminum plate back into the fe...

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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

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Application Information

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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
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