Technique for electrolyzing slurry of fluosilicic acid in bismuth mine

A technology of slurry electrolysis and fluorosilicic acid is applied in the refining field of bismuth, which can solve the problems of low efficiency and complicated operation, and achieve the effects of simplified equipment structure, simple process, and reduced cost and energy consumption.

Inactive Publication Date: 2003-05-07
HUNAN JINWANG BISMUTH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Coarse bismuth ingots must be made before electrolysis, so

Method used

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  • Technique for electrolyzing slurry of fluosilicic acid in bismuth mine
  • Technique for electrolyzing slurry of fluosilicic acid in bismuth mine

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Embodiment Construction

[0030] The following embodiments will further describe the present invention in detail:

[0031] This implementation mode takes Xujiadong Fengrun Smelter as an example. The total construction area of ​​the production plant and power supply room of the project is 1000m 2 , the power supply is a 500KVA transformer.

[0032] The main equipment used in this embodiment is selected as:

[0033] 1. Pulp electrolytic slurry tank

[0034] Select Φ1500×2000mm (V 液 =3.5m 3 ) Two pulping tanks, motor power 2.2kw×2=4.4kw, made of acid-resistant steel bricks.

[0035] 2. Slurry electrolyzer

[0036] The size of the slurry electrolytic cell is 2000×1500×1750mm, the DC current intensity is 2700A, and the electrolysis time is 1.25 times of the theoretical electrolysis time of bismuth, so the daily concentrate volume of a single tank is 2700×2.6÷100×22÷1.25÷20%=618kg / d tank; number of pulp electrolyzers: 7.41×2252÷618=18, divided into three rows, each row with 9 electrolyzers connected i...

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Abstract

A process for electrolyzing the fluorosilicic acid sludge of bismuth ore concentrate to obtain high-purity (99.999%) bis muth includes such steps as preparing sludge, adding hydrochloric acid to regualte acidity, electrolyzing to educe out spongy bismuth from the cathode, pressure filter, smelting, and removing impurities by introducing chlorine gas and sodium hydroxide. Its advantages are low cost and energy consumption, and high quality of product.

Description

technical field [0001] The invention relates to a bismuth refining method; in particular, it relates to a bismuth ore fluorosilicate slurry electrolysis process. Background technique [0002] Bismuth is in group 5 of the periodic table, its chemical atomic weight is 208.9804, and the outer electron is 6S 2 6P 3 , usually shown as +3 valence and +5 valence, and in a few cases it is shown as +2 valence, +1 valence, -3 valence and -1 valence; metal bismuth is a silver-gray shiny solid, brittle, easy to break, and hard. The specific gravity is 9.78, soluble in dilute HNO 3 , hot H 2 SO 4 and concentrated hydrochloric acid. Scientist Georgius Agricoq first noticed the presence of bismuth in melts of the ore. However, it was not until the smelting of bismuth in the eighteenth century that bismuth was confirmed as an element. In the last century, it was first discovered that bismuth compounds have an analgesic effect on gastric diseases. So far, bismuth compounds are still ...

Claims

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Application Information

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IPC IPC(8): C25C1/22
CPCY02P10/20
Inventor 吴祖祥戴建国曹宏武
Owner HUNAN JINWANG BISMUTH
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