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A method for leaching weathering crust elution-type rare earth ore by using waste extraction liquid

A weathering crust leaching type and waste technology, which is applied in the field of hydrometallurgy, solid waste disposal, and mineral processing, and can solve problems such as environmental pollution, soil and ecological damage

Active Publication Date: 2022-03-11
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for leaching weathering crust leaching-type rare earth ores using waste extracts. The method utilizes fruit and vegetable wastes to prepare leaching agents containing organic acids and sugars to overcome the existing ammonium sulfate Defects such as environmental pollution, soil and ecological damage in the process of leaching weathering crust leaching type rare earths with cationic salt leaching agents, and at the same time carry out harmless treatment and resource utilization of fruit and vegetable wastes

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Pick 8 kilograms of rotten apples, rotten oranges, and rotten tomatoes, wash them, crush them, add 8L of water, place them in a 340W power ultrasonic environment, and heat them to 60°C in a water bath. After extraction for 1 hour, filter the mixture, and depressurize the filtered solution Concentrate to 1 / 8 volume. The components of the concentrate are analyzed by atomic absorption spectroscopy, ion chromatography, and liquid chromatography. The main components of the concentrate are sugar, organic acids, nitrogen, phosphorus, and potassium.

[0016] Weigh 200.0 grams of dried weathered crust elution-type rare earth ore and put it into a glass leaching column, inject 1000 ml of leaching agent for leaching, and perform circular spraying (spray speed is 0.69mL / min), and the leaching time is 5 hour; Then use 150 milliliters of water to rinse and collect the leachate. The leaching concentration of rare earth elements in the leaching solution was measured by an inductively ...

Embodiment 2

[0018] Pick 8 kilograms of rotten pears, rotten lemons, and rotten lettuce, wash them, crush them, add 8L of water, place them in a 380W power ultrasonic environment, heat them to 65°C in a water bath, extract for 1.5 hours, filter the mixture, and decompress the filtered solution Concentrate to 1 / 6 volume. The components of the concentrate are analyzed by atomic absorption spectroscopy, ion chromatography, and liquid chromatography. The main components of the concentrate are sugar, organic acids, nitrogen, phosphorus, and potassium.

[0019] Weigh 200.0 grams of dried weathering crust elution type rare earth ore and put it into the glass leaching column, inject 1000 milliliters of leaching agent to carry out circulating spray leaching (spray speed is 0.69mL / min), the leaching time is 5 hours, and then Use 150 ml of water to rinse and collect the leaching solution. The leaching concentration of rare earth elements in the leaching solution was measured by an inductively couple...

Embodiment 3

[0021] Select 8 kg of rotten grapes, rotten peaches, and rotten cantaloupe, wash them, crush them, add 8L of water, place them in a 380W power ultrasonic environment, heat them to 50°C in a water bath, extract for 0.5 hours, filter the mixture, and depressurize the filtered solution Concentrate to 1 / 14 volume. The components of the concentrate are analyzed by atomic absorption spectroscopy, ion chromatography, and liquid chromatography. The main components of the concentrate are sugar, organic acids, nitrogen, phosphorus, and potassium.

[0022] Weigh 200.0 grams of dried weathering crust elution type rare earth ore and put it into the glass leaching column, inject 1000 milliliters of leaching agent to carry out circulating spray leaching (spray speed is 0.69mL / min), the leaching time is 5 hours, and then Use 150 ml of water to rinse and collect the leaching solution. The leaching concentration of rare earth elements in the leaching solution was measured by an inductively cou...

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Abstract

The invention discloses a method for leaching weathering crust elution-type rare earths by using waste extraction liquid, which comprises the following steps: 1) Preparation of leaching agent: after washing fruit and vegetable wastes, they are crushed, and then the crushed fruits and vegetables are discarded The material is placed in water, and at a set temperature, ultrasonic extraction is carried out. After the extraction is completed, it is filtered, and the filtrate is concentrated under reduced pressure to obtain a leaching agent; Then add the leaching agent prepared in step 1) according to a certain mass-volume ratio to carry out leaching, and after leaching, rinse with an aqueous solution to obtain a leach solution containing rare earth ions. The fruit and vegetable waste extract selected in the present invention can efficiently leach ionic rare earth ore, and using the fruit and vegetable waste extract as a weathering crust leaching type rare earth leaching agent can promote the formation of soil aggregate structure in mining areas, reduce soil bulk density, and enhance soil water holding capacity.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, hydrometallurgy and solid waste disposal, and in particular relates to a method for leaching weathering crust leaching type rare earth ore by using waste extract solution. Background technique [0002] Weathering crust elution-type (ion-type) rare earth is an important rare earth-containing mineral resource, which is a strategic key mineral resource. It is mainly distributed in Guangdong, Guangxi, Fujian, Hunan, Zhejiang, Jiangxi and other provinces in southern my country. Heavy rare earth elements, among which the reserves of medium and heavy rare earth elements account for the vast majority of the world's reserves. The weathering crust leaching type rare earth ore is a kind of clay mineral, and the rare earth element is usually adsorbed on the clay mineral in the form of hydrated or hydroxyl hydrated ions. Because the rare earth elements in this kind of rare earth ore mostly exist in...

Claims

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Application Information

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IPC IPC(8): C22B3/16C22B59/00
CPCC22B3/16C22B59/00Y02P10/20
Inventor 申丽赵红波赵煜邱冠周
Owner CENT SOUTH UNIV
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