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Device and method for removing impurities in mercury-containing crude selenium

A crude selenium and oxidation furnace technology is applied in the preparation of selenium/tellurium, binary selenium/tellurium compounds, selenium/tellurium oxides/hydroxides, etc. high energy consumption

Active Publication Date: 2018-12-11
映泽新材料(深圳)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is a more reasonable method for treating slag or dust with high mercury content and low selenium content, it also has problems such as high energy consumption, large amount of hazardous waste residue, difficult disposal, and unsatisfactory selenium yield.

Method used

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  • Device and method for removing impurities in mercury-containing crude selenium
  • Device and method for removing impurities in mercury-containing crude selenium
  • Device and method for removing impurities in mercury-containing crude selenium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3

[0066] Embodiments 1 to 3 of the device of the present invention are as figure 1 As shown, it includes oxidation furnace 1, 1# and 2# crystallizer 2, separator 3, 1# and 2# spray tower 4, filter 5, ion exchange column 6 and reduction tank 7; The top is provided with an oxygen delivery device 1-1 and a temperature measuring device 1-2, and the air outlet on the top of the oxidation furnace 1 is connected to the air inlet on the top of the 1# crystallizer 2; The air inlet on the crystallizer 2 top is connected; the air outlet on the 2# crystallizer 2 top is connected with the air inlet on the separator 3 top; the bottom of the 1# and 2# crystallizer 2 is provided with a discharge port 2-1; The air outlet of the separator 3 is connected to the air inlet at the bottom of the 1# spray tower 4 through the water sealer 4-1 and the induced draft fan 4-2; the water tank 4 at the bottom of the 1# and 2# spray tower 4- 3 Connect the tops of the 1# and 2# spray towers 4 through the spray...

Embodiment 1

[0069] Put 5kg of mercury-containing crude selenium in the oxidation furnace 1, seal it, first heat the 1# and 2# crystallizer 2 to 260 °C, stop heating the 1# and 2# crystallizer 2, and then heat the oxidation furnace 1, when the oxidation After the temperature of furnace 1 reaches 100°C, oxygen is supplied to oxidation furnace 1 through oxygen cylinder 1-1, the output pressure of oxygen supply is 0.25MPa, the flow rate is 2.5L / min, and the induced draft fan 4-2 of spray tower 4 is started at the same time and spray pump 4-4, when the temperature of oxidation furnace 1 reaches 350°C, heat preservation reaction for 1.5h, then further heat oxidation furnace 1 to 550°C, increase the oxygen flow rate to 12L / min at the same time, heat preservation reaction for 4.5h, when When the temperature in 1# and 2# crystallizer 2 is ≤250℃, stop heating the oxidation furnace 1, the oxygen flow rate is reduced to 2.5L / min, and cool naturally for 7 hours. When the temperature in the oxidation fu...

Embodiment 2

[0071]Put 5kg of mercury-containing crude selenium in the oxidation furnace 1, seal it, first heat the 1# and 2# crystallizer 2 to 300 °C, stop heating the 1# and 2# crystallizer 2, and then heat the oxidation furnace 1, when the oxidation After the temperature of the furnace 1 reaches 120°C, oxygen is supplied to the oxidation furnace 1 through the oxygen cylinder 1-1, the output pressure of the oxygen supply is 0.3MPa, and the flow rate is 2L / min. At the same time, the induced draft fan 4-2 and the Spray pump 4-4, when the temperature of oxidation furnace 1 reaches 400°C, heat preservation reaction for 1h, then further heat oxidation furnace 1 to 600°C, at the same time increase the oxygen flow rate to 10L / min, heat preservation reaction for 5h, when 1# and When the temperature in 2# crystallizer 2 is ≤250°C, stop heating the oxidation furnace 1, reduce the oxygen flow rate to 2L / min, and let it cool naturally for 8 hours. When the temperature is less than or equal to 100°C,...

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Abstract

The invention relates to a device and a method for removing impurities in mercury-containing crude selenium. The device comprises an oxidizing furnace, a crystallizer, a separator, a spraying tower, afilter, an ion exchange column and a reduction tank, wherein an oxygen gas conveying device and a temperature measuring device are arranged at the top part of the oxidizing furnace; an air outlet atthe upper part of the oxidizing furnace is connected with an air inlet at the upper part of the crystallizer; an air outlet at the upper part of the crystallizer is connected with an air inlet at theupper part of the separator; the lower part of the crystallizer is provided with a material outlet; an air outlet of the separator is connected with an air inlet at the lower part of the spraying tower through a water sealing device and an induced draft fan; a water tank at the bottom part of the spraying tower is connected with the top part of the spraying tower through a spraying pump; a water outlet of the water tank is connected with the filter; the filter is connected with an inlet at the lower part of the ion exchange column; an outlet at the upper part of the ion exchange column is connected with the reduction tank. The invention also discloses the method for removing the impurities in the mercury-containing crude selenium. The device and the method have the advantages that the device and the method are simple, the selenium separating effect is good, the cost is low, and the device and the method are suitable for industrialized production.

Description

technical field [0001] The invention relates to a device and method for removing mercury, in particular to a device and method for removing impurities from mercury-containing crude selenium. Background technique [0002] Selenium has no independent deposits in nature, and is generally associated with sulfide deposits of copper, silver, lead, and mercury. In addition, low-temperature hydrothermal mercury-antimony deposits and gold-silver deposits are also rich in selenium and tellurium. They mainly form various selenium-rich mineral deposits. Selenium or telluride of copper, silver, lead and mercury with tellurium, followed by selenium or telluride and sulfide of nickel, cobalt, bismuth and arsenic. However, these deposits are limited in scale, so they will not become huge industrial mineral sources rich in selenium and tellurium. Then, the limited selenium resources become more precious, and it will be particularly important for the efficient utilization of low-grade seleniu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B19/04
CPCC01B19/001C01B19/004C01P2006/80
Inventor 赵铁光伍代明张烨唐建湘
Owner 映泽新材料(深圳)有限公司
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