Combustion chamber and method for synthesizing ultrafine lanthanum oxide powder through combustion

A combustion chamber, lanthanum salt technology, applied in the field of rare earth oxide powder, can solve the problems of slow gel process, uneven particle size, complex preparation process, etc., to improve the rate and conversion, uniform distribution, good dispersion Effect

A combustion chamber, lanthanum salt technology, applied in the field of rare earth oxide powder, can solve the problems of slow gel process, uneven particle size, complex preparation process, etc., to improve the rate and conversion, uniform distribution, good dispersion Effect

CN112707430AActive Publication Date: 2021-04-27JIANGXI UNIV OF SCI & TECH
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  • Combustion chamber and method for synthesizing ultrafine lanthanum oxide powder through combustion
  • Combustion chamber and method for synthesizing ultrafine lanthanum oxide powder through combustion
  • Combustion chamber and method for synthesizing ultrafine lanthanum oxide powder through combustion

Examples

Experimental program
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Effect test

Embodiment 1

[0044] (1) Add lanthanum nitrate in ethanol, stir at room temperature, obtain clear lanthanum nitrate solution, concentration is 5mol / L;

[0045] (2) Prepare the ethanol solvent, send ethanol into the combustion chamber from the nozzles P1 and P3 of the combustion chamber with oxygen as the carrier gas, the feed rate is 20mL / min, and ignite to make the ethanol burn;

[0046] (3) after treating that ethanol burns for 3 minutes, take hydrogen as carrier gas, the lanthanum nitrate solution prepared in the step (2) is sent in the combustion chamber from the nozzle P2 of combustion chamber and P4, and feed rate is 15mL / min, After being ignited, combustion occurs to form lanthanum oxide, and the pressure in the combustion chamber is 0.8 atmospheres at this time;

[0047] (3) Catch the combustion product in the combustion chamber with a cyclone separator and a bag filter, after testing, the content of lanthanum oxide in the combustion product is 92%;

[0048] (4) The collected combu...

Embodiment 2

[0052] (1) adding lanthanum chloride to a mixed solvent of ethanol and acetone, stirring at room temperature to obtain a clear lanthanum chloride solution with a concentration of 8mol / L;

[0053] (2) prepare gasoline solvent, take oxygen as carrier gas gasoline is sent in the combustion chamber from nozzle P1 and P3 in the combustion chamber, feeding rate is 20mL / min, and ignition makes it burn;

[0054] (3) after gasoline burns 3 minutes, take air as carrier gas that the lanthanum chloride solution prepared in step (1) is sent in combustion from nozzle P2 and P4 in the combustion chamber, feed rate is 10mL / min, After being ignited, combustion occurs to generate lanthanum oxide, and the pressure in the combustion chamber is 0.7 atmospheres at this time;

[0055] (4) Catch the combustion product produced by the reaction in the combustion chamber with a cyclone separator and a bag filter. After testing, the content of lanthanum oxide in the combustion product is 87%;

[0056] (...

Embodiment 3

[0058] (1) Add lanthanum sulfate in the acetone solvent, stir at room temperature, obtain clear lanthanum sulfate solution, the concentration of rare earth salt is 1mol / L;

[0059] (2) Prepare acetone solvent, load acetone into the nozzles P1 and P3 in the combustion chamber with oxygen, the feed rate is 20mL / min, and ignite to make it burn;

[0060] (3) After acetone was burned for 3 minutes, the lanthanum sulfate solution prepared in step (1) was sent into the combustion chamber from the nozzles P2 and P4 of the combustion chamber with oxygen as the carrier gas, and the feed rate was 5mL / min, which was After ignition, combustion occurs to generate lanthanum oxide powder, and the air pressure in the combustion chamber is 0.9 atmospheres;

[0061] (4) Catch the combustion product produced by the reaction in the combustion chamber with a cyclone separator and a cloth bag filter. After testing, the content of lanthanum oxide in the combustion product is 94%;

[0062] (5) Calcin...

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Abstract

The invention relates to the technical field of rare earth oxide powder, and provides a combustion chamber and a method for synthesizing ultrafine lanthanum oxide powder through combustion. A combustion chamber comprising four atomizing nozzles is adopted to synthesize superfine lanthanum oxide powder, a first atomizing nozzle and a third atomizing nozzle are symmetrically distributed, and a second atomizing nozzle and a fourth atomizing nozzle are symmetrically distributed; the method comprises the following steps: feeding a flammable solvent into the combustion chamber from the first atomizing nozzle and the third atomizing nozzle under the action of a first carrier gas for ignition, feeding a lanthanum salt solution into the combustion chamber from the second atomizing nozzle and the fourth atomizing nozzle under the action of a second carrier gas for combustion, combusting more than 85% of lanthanum salt to generate lanthanum oxide in the combustion process, and subjecting the combustion product to microwave oxidation calcination to convert a small amount of residual lanthanum salt into lanthanum oxide. The method provided by the invention is simple in process, short in flow, easy to operate and low in cost, and the obtained ultrafine lanthanum oxide powder is good in dispersity, high in purity and uniform in particle size.

Description

technical field [0001] The invention relates to the technical field of rare earth oxide powders, in particular to a combustion chamber and a method for combusting and synthesizing ultrafine lanthanum oxide powders. Background technique [0002] Lanthanum oxide (La 2 o 3 ) is one of the important products in light rare earths. Because of its good physical and chemical properties, it has been widely used in civil, military and commercial science and technology fields. At present, it has been used in glass, ceramics, catalysts, phosphors, lasers , Heating body, cathode material and electrical contacts and other fields are widely used. Superfine La 2 o 3 Due to the characteristics of small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect, the powder has different thermal, magnetic, electrical, optical and other sensitive characteristics and surface stability, which are different from traditional powders and show more excellent perform...

Claims

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Application Information

Patent Timeline
27 Apr 2021
Publication
CN112707430A
IPC
C01F17/229; C01F17/10
CPC
C01F17/229; C01F17/10; C01P2004/62; C01P2004/61; C01P2006/80; Y02P20/54
Inventors
陈颢; 羊建高