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Method for comprehensively recovering selenium, vanadium and silver from vanadium silver polymetallic ore containing selenium employing wet process

A technology for recovering selenium from polymetallic ore is applied in the field of non-ferrous metal metallurgy, which can solve the problems of high energy consumption, flying dust and low selenium recovery rate, and achieve the effects of high metal recovery rate, low production cost and simple operation.

Active Publication Date: 2014-02-05
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for vanadium-silver ores containing selenium, due to the low grades of vanadium and silver, high-temperature roasting consumes a lot of energy, and the recovery rate of selenium is low, which is economically unreasonable; and in the production process, it is easy to produce SeO-containing 2 Toxic gas, toxic gas is easy to leak, and there is dust flying, serious environmental pollution

Method used

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  • Method for comprehensively recovering selenium, vanadium and silver from vanadium silver polymetallic ore containing selenium employing wet process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The vanadium-silver ore containing selenium is crushed and ball-milled until the particle size is less than 0.074mm, accounting for 90%. 2mol / l sulfuric acid solution is mixed with the vanadium-silver ore at a liquid-solid ratio of 2:1, and sodium chlorate with a mass of 3% of the vanadium-silver ore is added. After reacting at a temperature of 90°C for 8 hours, solid-liquid separation was carried out. At this time, the vanadium leaching rate was 85%, and the selenium leaching rate was 85%. Reduction and selenium precipitation are carried out on the leaching solution, and sulfur dioxide gas is introduced into the amount of 3Kg / Kg-selenium to obtain selenium powder and vanadium-containing liquid, and the vanadium-containing liquid is subjected to reduction and neutralization, extraction and stripping, and vanadium precipitation according to the traditional process Calcination to prepare vanadium pentoxide products. The silver-containing leaching slag is traditionally cya...

Embodiment 2

[0035] The vanadium-silver ore containing selenium is crushed and ball-milled until the particle size is less than 0.074mm, accounting for 90%, 3mol / l sulfuric acid solution is mixed with the vanadium-silver ore at a liquid-solid ratio of 3:1, and chlorine gas with a mass of 6% of the mass of the vanadium-silver ore is added. After reacting at a temperature of 90°C for 10 hours, solid-liquid separation was carried out. At this time, the leaching rate of vanadium was 88%, and the leaching rate of selenium was 86%. Reduction and selenium precipitation are carried out on the leaching solution, and sulfur dioxide gas is introduced at a rate of 4Kg / Kg-selenium to obtain selenium powder and vanadium-containing liquid, and the vanadium-containing liquid is subjected to reduction and neutralization, extraction and stripping, and vanadium precipitation according to the traditional process Calcination to prepare vanadium pentoxide products. The silver-containing leaching slag is traditi...

Embodiment 3

[0037] Selenium-containing vanadium-silver ore is crushed and ball-milled to a particle size of 0.074 mm or less, accounting for 95%, 2mol / l sulfuric acid solution is mixed with vanadium-silver ore at a liquid-solid ratio of 5:1, and hydrogen peroxide with 8% vanadium-silver ore quality is added. After reacting at a temperature of 80°C for 24 hours, solid-liquid separation was carried out. At this time, the leaching rate of vanadium was 85%, and the leaching rate of selenium was 81%. The leaching solution is reduced and selenium-precipitated, and the amount of iron powder added is 6Kg / Kg-selenium to obtain selenium powder and vanadium-containing liquid, and the vanadium-containing liquid is reduced and neutralized, extracted and stripped, and vanadium-precipitated and calcined to prepare pentoxide Vanadium products. The silver-containing leaching slag is traditionally leached with thiourea and replaced with zinc powder to produce silver products.

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Abstract

The invention provides a method for comprehensively recovering selenium, vanadium and silver from a vanadium silver polymetallic ore containing selenium by adopting a total-wet process aiming at a vanadium silver polymetallic shale mine containing selenium. The method concretely comprises the following steps: crushing and grinding the vanadium silver polymetallic ore containing selenium, then carrying out sulfuric acid leaching under an oxidation condition; leaching selenium in an oxidation manner and entering inside a solution together with vanadium, leaving silver in leaching residue, precipitating crude selenium from lixivium in a reduction manner; continuing to recover vanadium from by a selenium-precipitating solution by extraction or ion exchange, wherein the lixivium containing silver adopts a common process to recover silver. The technology has the advantages of being short in flow, simple to operate, low in energy consumption, high in metal recovery rate, low in production cost and the like; the target of clean and energy-saving and environment-friendly comprehensive recovery from the vanadium silver polymetallic ore is achieved.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal metallurgy, and relates to a method for comprehensively recovering selenium from vanadium-silver-selenium polymetallic ore by wet method. Background technique [0002] Selenium (Se) is a rare element on the earth, which is dispersed in the crust, and its Clark value in the crust is only 0.05×10 -6 , whose abundance is estimated to be about 10 times that of the Earth's crust by weight -7 %, accounting for the 70th of chemical elements, so it is usually extremely difficult to form industrial enrichment in nature. [0003] Selenium is a typical photosensitive semiconductor material, its chemical properties are between metals and non-metals, and it is a typical semi-metal. It is widely used in chemical industry, metallurgy, building materials, electronics and other industrial sectors, and has important medicinal value. [0004] Selenium is distributed all over the world. At present, the p...

Claims

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Application Information

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IPC IPC(8): C22B11/00C22B34/22C22B3/04C22B3/26C01B19/02
CPCY02P10/20
Inventor 蒋训雄范艳青汪胜东张登高冯林永刘巍蒋伟王仍坚尹一男
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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