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Preparation method of selenium powder

A technology of selenium powder and selenium block, which is applied in the direction of element selenium/tellurium, can solve the problems of large friction loss between the grinding body and the body, large energy consumption, low work efficiency, etc., and achieves short time consumption, improved production efficiency, and low pollution. Effect

Inactive Publication Date: 2016-10-19
FIRST RARE MATERIALS CO LTD
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  • Description
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Problems solved by technology

[0003] At present, the main preparation method of selenium powder is mechanical crushing through ball milling. The disadvantages of this method are: (1) bulky and heavy; (2) strong vibration and noise during operation. It is widely used in the crushing of hard materials, and a solid foundation is required; (3) Low working efficiency and high energy consumption; (4) The friction loss between the grinding body and the machine body is very large, and will contaminate the product

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  • Preparation method of selenium powder

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preparation example Construction

[0015] The invention provides a kind of preparation method of selenium powder, comprises the following steps:

[0016] Put selenium blocks or selenium particles into the quartz tube, connect the reaction device, turn on the condensing equipment, set the temperature required for condensation, set the heating temperature, turn on the heating, after the selenium blocks are all vaporized, turn off the heating, and after cooling Collect the selenium powder from the collection bottle.

[0017] In the present invention, selenium particles or selenium blocks are heated, evaporated and cooled, and after the selenium blocks or selenium particles are evaporated and condensed, the selenium powder can be obtained. The method provided by the invention requires simple equipment, simple process steps and short time consumption, thereby improving the production efficiency of the selenium powder. Moreover, the selenium powder obtained by the preparation method provided by the invention has uni...

Embodiment 1

[0022] Put 10kg of selenium particles into the quartz tube, connect the device; turn on the condensing device, set the condensing temperature to 5°C, turn on the heating, heat at 10°C per minute, heat to 650°C for 2.5h, and then at 4°C per minute, Heat to 720°C. After all the selenium blocks are vaporized, turn off the heating, and obtain selenium powder from the collection bottle after cooling.

Embodiment 2

[0024] Put 5kg of selenium particles into the quartz tube, connect the device; turn on the condensing device, set the condensing temperature to 10°C, turn on the heating, heat at 8°C per minute, heat to 600°C for 2.5h, and then at 2°C per minute, Heat to 690°C. After all the selenium blocks are vaporized, turn off the heating, and obtain selenium powder from the collection bottle after cooling.

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Abstract

The invention aims to provide a preparation method of selenium powder. The preparation method comprises the following steps: adding selenium blocks or selenium particles into a quartz tube, connecting the quartz tube to a reaction device, starting a condensing facility, setting a condensing temperature, setting a heating temperature, starting to heat, after all selenium blocks are gasified, stopping heating, cooling, and collecting selenium powder in the collecting bottle. The preparation method has the advantages that the required equipment and technology are simple, the operation is convenient, the efficiency is high, and the product is not polluted.

Description

technical field [0001] The invention relates to a preparation method of solid powder, in particular to a preparation method of selenium powder. Background technique [0002] Selenium is a gray (dark red) powder or black glassy substance with a melting point of 217°C and a boiling point of 685°C. Selenium has a high vapor pressure between the melting point and the boiling point, and the vapor pressure increases as the temperature increases. It is mainly used in the production of selenium dioxide as a catalyst for electrolytic manganese smelting, rectifiers, photographic exposure agents, petrochemical work catalysts, toner cartridges, feed pigments, conductor materials, photometers, photocells, rectifiers, red glass, medical and health care drugs and other industries . Due to the relatively high activity of selenium powder, in most cases, such as the preparation of sodium selenite and copper indium gallium selenide targets, in order to improve efficiency and time, selenium p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/02
Inventor 文崇斌朱刘胡智向
Owner FIRST RARE MATERIALS CO LTD
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