Device and method for carrying out magnesium reduction and deoxidization on tantalum powder
A tantalum powder and oxygen reduction technology, applied in the field of tantalum powder and magnesium reduction and oxygen reduction, can solve the problems of blocked pipelines, tantalum powder pollution, economic loss, etc., and achieve the effect of reducing pollution, less loss of tantalum powder, and low oxygen content of tantalum powder
Active Publication Date: 2013-03-13
江门富祥电子材料有限公司
View PDF11 Cites 7 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Except for a small part of the excess magnesium in the tantalum powder being adsorbed by the surface of the tantalum powder, most of the rest exists in the bottom of the crucible in liquid form. Then, if the pressure in the reaction vessel is lower than 134.9mm Hg at 927°C when evacuating, it will Boiling the excess liquid magnesium in the tantalum powder crucible causes the tantalum powder to be sprayed into the reaction vessel, the heat shield, or even pumped into the vacuum pipeline, blocking the pipeline, and the part of the tantalum powder that can be collected is also polluted, causing serious economic problems. loss
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0053] Add 100kg of tantalum powder with an oxygen content of 6800ppm to 2000 grams of magnesium powder, (based on the theory that all the oxygen in the tantalum powder is removed, after the reaction is completed, the remaining 980 grams of magnesium need to use 1020 grams of magnesium-in fact, it cannot be completely removed), Magnesium powder and tantalum powder are mixed evenly, pack into 11 tantalum crucibles 16 li respectively, the crucible 16 that the tantalum powder 17 that is mixed with magnesium powder is housed is packed into such as figure 1 In the reaction vessel 10, hang the reaction vessel 10 into the pit furnace 14, open the cooling water pipeline 13, enter the water from the water inlet pipe 131, and discharge it from the drain pipe 132; evacuate from the exhaust pipe 20 to about 200Pa, stop the evacuation Finally, fill the argon gas from the pipeline 19 into the reaction vessel 10, keep the pressure in the reaction vessel 10 at 0.11MPa~0.14MPa, raise the tempe...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a device for carrying out magnesium reduction and deoxidization on tantalum powder, which comprises an electrical heating pit furnace and a cylindrical reaction vessel, wherein the cylindrical reaction vessel is arranged in the pit furnace; the reaction vessel mainly comprises an argon gas feed tube, a gas discharge tube, a thermocouple tube, and a crucible filled with tantalum powder; a heater is arranged at the outside of the reaction vessel at the position of the crucible; the crucible is arranged on the lower part of the reaction vessel; a magnesium collector is arranged above the tantalum powder crucible; a lower heat-insulating screen is arranged between the magnesium collector and the tantalum powder crucible; an upper heat-insulating screen is arranged above the magnesium collector; a cooling device is arranged at the outside of the reaction vessel at the position of the upper heat-insulating screen; and the argon gas feed tube extends to the inside of the bottom of the reaction vessel. The invention also provides a magnesium reduction and deoxidization process for tantalum powder by using the device. The magnesium reduction and deoxidization for tantalum powder is performed according to the invention, so that the loss of tantalum powder is less, the oxygen content of tantalum powder is low, and the recovered magnesium metals can be reused, thereby reducing the pollution to the environment.
Description
technical field [0001] The present invention relates to a device for reducing oxygen by reducing tantalum powder and magnesium, and also relates to a method for reducing oxygen by using the device to reduce oxygen by reducing tantalum powder and magnesium. Background technique [0002] Tantalum metal is a rare and precious metal, and one of its important uses is to make electrolytic capacitors. Tantalum powder used as a capacitor requires high purity. The production of capacitor-grade tantalum powder is usually carried out by reducing potassium fluorotantalate (K 2 TaF 7 ) The product containing tantalum powder, alkali metal and polybasic salt is washed and recovered to obtain tantalum powder, followed by pickling and water washing, and the washed tantalum powder must be subjected to vacuum heat treatment to meet the requirements for making electrolytic capacitors. However, because tantalum metal has a great affinity for oxygen, the tantalum powder prepared through the ab...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/24C22B5/04B22F9/24
CPCY02P10/20
Inventor 郑祥云廖志刚朱德忠
Owner 江门富祥电子材料有限公司