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Vacuum recrystallization method for purifying metallic antimony and equipment thereof

A technology of vacuum rectification and purification method, which is applied in the direction of improving process efficiency, etc., and can solve problems such as secondary pollution and complex purification of antimony metal, and achieve the effects of improving recovery rate, simple and reasonable structure, and solving technical problems

Inactive Publication Date: 2005-10-26
云南省通海大方科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is easy to form secondary pollution, that is to say, when removing arsenic and sulfur, the impurities contained in copper wire and soda ash enter the metal antimony, which makes the purification of metal antimony more complicated.

Method used

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  • Vacuum recrystallization method for purifying metallic antimony and equipment thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Crush 350 kg of 1# industrial antimony into irregular blocks of Φ20-Φ40, place it in the evaporator 11, place the tray 9, condenser 10, collector 6 and collector cover 4 in order, and start the heating device 7 , The temperature of the evaporator is controlled at 750°C to melt the metal antimony block and form a vapor pressure. The vacuum chamber pressure is controlled at 1Pa. The temperature of the first, second and third sections is controlled at 550°C, and the temperature of the fourth section is controlled at 350°C.

[0022] The metal antimony melts and evaporates, and under the action of the diffusion pump 12 and the vacuum mechanical pump 13, the antimony vapor evaporates upward along the tray holes. The first large-aperture tray separates the impurities with t>1 evaporated simultaneously with the antimony, and keeps them in the crucible, and the second small-aperture tray further separates the impurity elements with a t slightly greater than 1 in the vapor. Lef...

Embodiment 2

[0028] Repeat Example 1, with the following differences: the temperature of the evaporator is controlled at 800°C, the pressure of the vacuum chamber is controlled at 0.5Pa, the temperature of the first to third condensation sections is controlled at 700°C, and the temperature of the fourth condensation section is controlled at 400°C to obtain a grade of 99.999 % metal antimony.

Embodiment 3

[0030] Repeat Example 1, with the following differences: the vacuum chamber pressure is controlled at 0.5Pa, the temperature of the first to third condensation sections is controlled at 600°C, and the temperature of the fourth condensation section is controlled at 400°C; Metal antimony 120 kg. The results detected by the glow discharge mass spectrometer are shown in Table 2.

[0031] Impurity name

[0032] *Interference exists

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Abstract

The present invention discloses a method of refining Sb by vacuum distillation and its equipment. The industrial stibium is broken up, added to crucible and then placed it into the evaporator of vacuum re-distillation furnace. Start heat installation, vacuum mechanical pump and diffuse pump by turns to fuse Sb in order to form steam of Sb. At the function of vacuum mechanical pump and diffuse pump, the stream raised by the hole of column tray. Impurities whose boiling point is higher than Sb will stay in the crucible. Because there is a part of condensation between two column tray of the condenser, Sb crystallizes in different parts of condensation by terns as the steam ascend The Impurities whose boiling point is lower than Sb stream will continually ascend continually. The temperature of collector is about 12 - 150 Deg. C so that all the impurities vapor will be inside it, and we can get the purpose of purification. This invention doesn't need to distill for many times and add other chemicals, and can purify Sb one-off. The techniques is simple, and the quality is steady. The production can get the purity of more than 99.99%.

Description

technical field [0001] The invention relates to a method for purifying metal antimony, more specifically, a method for purifying metal antimony by vacuum rectification, and meanwhile, the invention also relates to a device for realizing the method. Background technique [0002] In the prior art, a vacuum distillation device has been used to remove arsenic and sulfur from metal antimony. The method is to place a copper wire on a graphite crucible for vacuum distillation and add soda ash and other substances. This method is easy to form secondary pollution, that is to say, when removing arsenic and sulfur, the impurities contained in copper wire and soda ash enter the metal antimony, which makes the purification of metal antimony more complicated. This is a technical problem that has not been solved for a long time. Contents of the invention [0003] The object of the present invention is to overcome above-mentioned shortcom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B30/02
CPCY02P10/20
Inventor 鲁燕杰
Owner 云南省通海大方科技有限公司
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