Method for leaching calcium and strontium by using low concentration hydrochloric acid to chemically separate Weishan Lake rare earth concentrate

A rare earth concentrate, low concentration technology, applied in the direction of improving process efficiency, can solve the problems of long process flow, low rare earth yield, serious three waste pollution, etc. Effect

Active Publication Date: 2018-09-21
中稀(寿光)资源科技有限公司
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Problems solved by technology

[0003] The existing 40% grade Weishan Lake rare earth concentrate treatment process has the problems of long process flow, low rare earth yield and serious waste pollution, and is no longer suitable for the development of technology in this field

Method used

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  • Method for leaching calcium and strontium by using low concentration hydrochloric acid to chemically separate Weishan Lake rare earth concentrate
  • Method for leaching calcium and strontium by using low concentration hydrochloric acid to chemically separate Weishan Lake rare earth concentrate
  • Method for leaching calcium and strontium by using low concentration hydrochloric acid to chemically separate Weishan Lake rare earth concentrate

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Embodiment 1

[0029] Example 1 A method for leaching calcium and strontium chemical separation of Weishan Lake rare earth concentrate with low-concentration hydrochloric acid

[0030] The grade of Weishan Lake rare earth concentrate used as raw material is lower than 40%.

[0031] 1. Measure 11.8m³ of hydrochloric acid, inject it into the reaction tank, the concentration of hydrochloric acid (equivalent concentration) is 2.6N, put in 3.73t Weishan Lake rare earth concentrate, raise the temperature to 90°C and stir for 2 hours. At this time, the concentration of rare earth will not change. to terminate the reaction.

[0032] Filtrate to obtain the filtrate, which is injected into another tank as a primary acid bubble liquid, with a total of 14.2m³;

[0033] Filter to obtain 2.2t of filter residue, said filter residue: the moisture content is 15.90%, the rare earth oxide content is 50.81%; it is the target solid phase.

[0034] The content of ingredients in the primary acid bubble solution:...

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Abstract

The invention provides a method for leaching calcium and strontium by using low concentration hydrochloric acid to chemically separate Weishan Lake rare earth concentrate. The method comprises the following steps: immersing the Weishan Lake rare earth concentrate in the low concentration hydrochloric acid, and heating the obtained solution to perform a reaction; adding the Weishan Lake rare earthconcentrate to a filtered leachate, heating the obtained solution to perform a reaction, carrying out solid-liquid separation, discharging the obtained liquid, and reusing the obtained solid phase. The grade of the Weishan Lake rare earth concentrate is improved to 50% from 40%, 90% of calcium carbonate and 85% of strontium carbonate in the Weishan Lake rare earth concentrate are efficiently leached out, the rare earth loss rate of below 1% is ensured, a discharged acid leaching waste liquid only contains calcium chloride, strontium chloride and a small amount of iron chloride, and wastewatertreatment is easy.

Description

technical field [0001] The invention relates to a low-concentration hydrochloric acid leaching method for calcium-strontium chemical separation of Weishan Lake rare earth concentrate, belonging to the technical field of rare earth hydrometallurgy. Background technique [0002] Weishan Lake Rare Earth Mine is a famous light rare earth deposit in my country, and it is one of the three major light rare earth mines in my country together with Baotou Mine and Sichuan Mine. As the raw material base of Shandong rare earth smelting and separation production line, Weishan Lake rare earth mine has the characteristics of large rare earth reserves and many impurity minerals, which make it difficult to smelt. [0003] The existing 40% grade Weishan Lake rare earth concentrate treatment process has the problems of long process flow, low rare earth yield, and serious waste pollution, and is no longer suitable for the development of technology in this field. Contents of the invention [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/10C22B59/00C22B26/20
CPCC22B3/10C22B26/20C22B59/00Y02P10/20
Inventor 胡德志李常清郑理杰孙国璐
Owner 中稀(寿光)资源科技有限公司
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