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A method for recovering rare metals lanthanum, cerium and zirconium from smelting slag

A technology for rare metals and smelting slag, which is applied in the field of recycling rare metals lanthanum, cerium and zirconium, can solve the problems of lanthanum recycling and other problems that are not mentioned, and achieve the effects of low reaction conditions and technical requirements, easy industrialization, and environmental friendliness.

Active Publication Date: 2020-08-04
GUIYAN RESOURCE YIMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Patent No. CN201410407037.6 "Method for Efficiently and Cleanly Recovering Platinum Group Metals from Spent Auto Catalysts" discloses a method for recovering platinum group metals from spent auto catalysts, but it does not mention how to recycle lanthanum, cerium and zirconium rare metal

Method used

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  • A method for recovering rare metals lanthanum, cerium and zirconium from smelting slag
  • A method for recovering rare metals lanthanum, cerium and zirconium from smelting slag
  • A method for recovering rare metals lanthanum, cerium and zirconium from smelting slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Weigh 200g of the smelting slag after the exhausted automobile catalyst has been smelted by high-temperature iron capture plasma at 1600°C, and the analysis composition is ZrO 2 The content is 3.1%, CeO 2 The content is 2.9%, La 2 o 3 content of 0.3%, MgO content of 9.1%, Al 2 o 3 The content is 32.6%, SiO 2 content of 30.5%, CaO content of 16.8%, Fe 2 o 3 The content is 0.6%, as shown in Table 1.

[0017] After crushing, more than 95% of the particle size is less than 85 μm, and put it into a round bottom flask with a constant temperature electric heating mantle.

[0018] 2) Add 800ml to form 15%H 2 SO 4 and 40% HCl leaching, H 2 SO 4 The volume ratio with HCl is 1:4, the leaching temperature is 50°C, the liquid-solid ratio is 4:1, and the leaching time is 3h.

[0019] 3) Filtration, the filter residue is silicon oxide, and the filtrate contains aluminum, iron, calcium, magnesium impurities and zirconium, lanthanum and cerium. Slowly add sodium hydroxid...

Embodiment 2

[0024] 1) Weigh 200g of the smelting slag after the exhausted automobile catalyst has been smelted by high-temperature iron capture plasma at 1600°C, and the analysis composition is ZrO 2 The content is 2.8%, CeO 2 The content is 2.4%, La 2 o 3 content of 0.45%, MgO content of 9.4%, Al 2 o 3 The content is 31.5%, SiO 2 content of 28.5%, CaO content of 17.8%, Fe 2 o 3 The content is 0.92%, as shown in Table 2.

[0025] After crushing, more than 98% of the particle size is less than 80 μm, and put it into a round bottom flask with a constant temperature electric heating mantle.

[0026] 2) Add 1000ml to form 25%H 2 SO 4 and 45% HCl leaching, H 2 SO 4 The volume ratio with HCl is 1:2, the leaching temperature is 45°C, the liquid-solid ratio is 5:1, and the leaching time is 5h.

[0027] 3) Filtration, the filter residue is silicon oxide, and the filtrate contains aluminum, iron, calcium, magnesium impurities and zirconium, lanthanum and cerium. Slowly add sodium hydro...

Embodiment 3

[0032] 1) Weigh 200g of the smelting slag after the exhausted automobile catalyst has been smelted by high-temperature iron capture plasma at 1600°C, and the analysis composition is ZrO 2 The content is 2.79%, CeO 2 The content is 2.45%, La 2 o 3 content of 0.5%, MgO content of 10.5%, Al 2 o 3 The content is 33.4%, SiO 2 content of 32.5%, CaO content of 17.4%, Fe 2 o 3 The content is 0.78%, as shown in Table 3.

[0033] After crushing, more than 90% of the particle size is less than 100 μm, and put it into a round bottom flask with a constant temperature electric heating mantle.

[0034] 2) Add 1600ml to form 25%H 2 SO4 and 60% HCl leaching, H 2 SO 4 The volume ratio with HCl is 1:6, the leaching temperature is 60°C, the liquid-solid ratio is 8:1, and the leaching time is 8h.

[0035] 3) Filtration, the filter residue is silicon oxide, and the filtrate contains aluminum, iron, calcium, magnesium impurities and zirconium, lanthanum and cerium. Slowly add sodium hydr...

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Abstract

The invention relates to a method for recovering rare metals of lanthanum, cerium and zirconium from smelting slag. The method comprises the following steps that (1) crushing is conducted, specifically, the smelting slag is crushed; (2) acid leaching is conducted, specifically, crushed smelting slag is subjected to acid leaching, and a zirconium-lanthanum-cerium solution containing impurities of aluminum, iron, calcium and magnesium is obtained; (3) hydrolysis impurity removing is conducted, specifically, the PH value in the solution is controlled, and thus the impurities of aluminum, iron, calcium and magnesium are hydrolyzed into precipitation to be removed; (4) sodium hydroxide is added into the solution, specifically, sodium hydroxide is added into the solution containing zirconium, lanthanum and cerium, lanthanum and cerium react with the sodium hydroxide to produce precipitation of La(OH)3 and Ce(OH)3, and lanthanum and cerium are separated and recovered; and (5) replacement is conducted, specifically, metal magnesium is added into filtrate, and metal zirconium is obtained through replacement. By adopting the technique, the metal recovery rate is high, the recovery rate of metal lanthanum and cerium reaches 92% or above, the recovery rate of metal zirconium reaches 95% or above, the method is simple in process and environmentally friendly, and industrial recovery is easyto achieve.

Description

technical field [0001] The invention belongs to the technical field of non-ferrous metal recovery, in particular to a method for recovering rare metals lanthanum, cerium and zirconium from smelting slag. Background technique [0002] Rare metals are mainly used in the manufacture of special steels, superhard alloys and high temperature resistant alloys in the electrical industry, chemical industry, ceramics industry, atomic energy industry and rocket technology. Rare earth metals represented by lanthanum and cerium have extremely important uses and are an important part of contemporary high-tech new materials. A series of compound semiconductors, electronic optical materials, special alloys, and new functional materials composed of rare earth metals and nonferrous metals And organometallic compounds, etc., require the use of rare earth metals with unique properties. Although the dosage is not large, it is very important and indispensable. Therefore, it is widely used in co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B59/00C22B34/14
CPCC22B7/007C22B7/009C22B7/04C22B34/14C22B59/00Y02P10/20
Inventor 李红梅赵金成雷霆贺小塘熊庆丰李勇李永佳王欢赵雨肖雄姚禹宁显雄
Owner GUIYAN RESOURCE YIMEN