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Method for extracting selenium from nickel-molybdenum ore smelting fume by catalytic oxidation leaching-control potential reduction

A technology of catalytic oxidation and nickel-molybdenum ore, which is applied in the field of selenium extraction, can solve the problems of flying dust, polluting the environment, and high energy consumption, and achieves the effects of increased leaching rate, high utilization rate, and fast leaching speed

Active Publication Date: 2014-02-26
CHANGSHA RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention solves the problem of low selenium recovery rate, high energy consumption and easy generation of SO in the traditional selenium extraction process. 2 , SeO 2 、As 2 o 5 and As 2 o 3 To solve the key technical problems such as toxic gas and toxic gas easy to leak, dust flying, environmental pollution, etc., a method of catalytic oxidation leaching-controlled potential reduction to extract selenium in nickel-molybdenum ore smelting dust is proposed. This method has short process, simple operation, Low energy consumption, high metal recovery rate, low production cost, etc., can achieve the metallurgical purpose of clean energy saving and environmental friendliness

Method used

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  • Method for extracting selenium from nickel-molybdenum ore smelting fume by catalytic oxidation leaching-control potential reduction
  • Method for extracting selenium from nickel-molybdenum ore smelting fume by catalytic oxidation leaching-control potential reduction
  • Method for extracting selenium from nickel-molybdenum ore smelting fume by catalytic oxidation leaching-control potential reduction

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Effect test

Embodiment 1

[0042] a kind of like figure 1 Shown is the technique for wet extraction of selenium from nickel-molybdenum ore smelting flue dust, comprises the following steps:

[0043] (1) Pretreatment of nickel-molybdenum ore smelting dust: firstly, the raw materials are crushed, ball milled and sieved, the oversize is returned for ball milling, the undersize (-150 mesh) is mixed evenly, and subsequent catalytic oxidation leaching is carried out;

[0044] (2) Catalytic oxidation leaching: the nickel-molybdenum ore smelting fumes pretreated in step (1) are subjected to catalytic oxidation leaching, and the catalytic oxidation leaching is carried out in a sulfuric acid leaching system, and FeCl is selected. 3 as the catalyst and hydrogen peroxide as the oxidizing agent; the specific operation process of catalytic oxidation leaching is as follows: first prepare [H + ] is 7mol / L of H 2 SO 4 Add 200ml of leaching solution into the reactor, then add 3.5g of FeCl to the leaching solution 3 a...

Embodiment 2

[0047] a kind of like figure 1 Shown is the technique for wet extraction of selenium from nickel-molybdenum ore smelting flue dust, comprises the following steps:

[0048] (1) Pretreatment of nickel-molybdenum ore smelting dust: first, crush, ball mill and sieve the raw materials, return the oversize to ball mill, and mix the undersize (-150 mesh) evenly; then, carry out subsequent catalytic oxidation leaching deal with;

[0049] (2) Catalytic oxidation leaching: the nickel-molybdenum ore smelting fumes pretreated in step (1) are subjected to catalytic oxidation leaching, and the catalytic oxidation leaching is carried out in a sulfuric acid leaching system, and FeCl is selected. 3 as the catalyst and hydrogen peroxide as the oxidizing agent; the specific operation process of catalytic oxidation leaching is as follows: first prepare [H +] is 6.5mol / L of H 2 SO 4 Add 250ml of leaching solution into the reactor, then add 4.0g of FeCl to the leaching solution 3 and 50g of ni...

Embodiment 3

[0052] a kind of like figure 1 Shown is the technique for wet extraction of selenium from nickel-molybdenum ore smelting flue dust, comprises the following steps:

[0053] (1) Pretreatment of nickel-molybdenum ore smelting dust: firstly, crush, ball mill and sieve the raw materials, return the oversize to ball mill, and mix the undersize (-180 mesh) evenly; then, carry out subsequent catalytic oxidation leaching deal with;

[0054] (2) Catalytic oxidation leaching: the nickel-molybdenum ore smelting fumes pretreated in step (1) are subjected to catalytic oxidation leaching, and the catalytic oxidation leaching is carried out in a sulfuric acid leaching system, and FeCl is selected. 3 as the catalyst and hydrogen peroxide as the oxidizing agent; the specific operation process of catalytic oxidation leaching is as follows: first prepare [H + ] is 7.5mol / L of H 2 SO 4 Leach solution 300ml, then add 14.6g of FeCl to the leach solution 3 and 50g of nickel-molybdenum ore smelti...

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Abstract

The invention discloses a method for extracting selenium from nickel-molybdenum ore smelting fume by catalytic oxidation leaching-control potential reduction. The method comprises the following steps of: adding the pre-treated nickel-molybdenum ore smelting fume to an acidic leaching system; by using FeCl3 as a catalyst and using hydrogen peroxide, oxygen, oxygen enriched air, chlorine, potassium chlorate or the like as an oxidizing agent, leaching out the selenium in the nickel-molybdenum ore smelting fume through catalytic oxidation, wherein the selenium element enters a leaching liquor; and then carrying out reduction reaction under an acidic condition by using the leaching liquor as a reaction solution of control potential reduction and using oxalic acid, formic acid, acetic acid, formaldehyde, diamine or the like as a reducing agent; and highly separating the selenium in the leaching liquor from other ions so as to obtain high-purity selenium powder. The method disclosed by the invention has the advantages of short process, simplicity in operation, low energy consumption, high recycling rate of the metal, low production cost, cleanness, energy conservation, environment friendliness and the like.

Description

technical field [0001] The invention relates to a selenium hydrometallurgical process, in particular to a method for extracting selenium from waste nickel-molybdenum ore smelting dust with high pollution. Background technique [0002] With the massive mining of nickel sulfide ore and molybdenum ore, its mineral reserves have been greatly reduced, and the content of nickel and molybdenum in the ore has also dropped significantly. The search for valuable resources that can be used and replaced to extract nickel and molybdenum has attracted great attention from metallurgists around the world. . In recent years, factories have been built in many areas, setting off an upsurge in the development and utilization of nickel and molybdenum resources in nickel-molybdenum ore. [0003] Nickel-molybdenum ore is a kind of polymetallic composite ore unique to my country. It is mainly distributed in the sedimentary nickel-molybdenum-vanadium polymetallic deposits and the main mineralizatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/02
Inventor 侯晓川彭俊
Owner CHANGSHA RES INST OF MINING & METALLURGY
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