Method for comprehensively recycling manganese, lead, silver and selenium from manganese anode slime

A technology of manganese anode slime and anode slime, which is applied in the field of resource recycling and circular economy, can solve the problems of waste of resources, complex pyrite composition, and inability to recycle selenium, so as to improve comprehensive recovery and recycling, and the source of reducing agent Reliable, good chemically driven effect

Active Publication Date: 2017-03-29
ZHUZHOU SMELTER GRP
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Problems solved by technology

The disadvantage is that the roasting time of this process is long, the roasting energy consumption is large, and the production efficiency is low
[0009] 5. Inorganic reductive acid leaching method, there are many studies on this method, such as the two-mine method, under certain conditions, the leaching rate of manganese can reach 90%, the disadvantage is that 1g of manganese anode slime needs 0.75g of pyrite, the dosage Too large, high cost, large amount of slag, unable to obtain qualified lead concentrate, forming new leached slag pollution, and at the same time, the composition of pyrite is complex, and contains a certain amount of gangue and Fe with large specific surface area. 2 o 3 These substances will absorb selenium in the solution during the leaching process, so selenium cannot be recycled, and the slag contains harmful elements selenium and lead, which are very difficult to deal with; another researcher uses SO 2 As a reducing agent, the anode slag is dried and ground to a particle size of 100 mesh, made into a slurry, and added with H 2 SO 4 and SO 2 , the reducing agent sulfite reduces manganese to MnSO 4 ,, after purification, concentration, etc., it can be used as electrolytic manganese mother liquor
The disadvantage is that the sulfur dioxide method is easy to bring a large amount of disulfide and sulfide ions into the solution, which affects the purity of the product, while SO 2 It is a raw material that pollutes the environment heavily. The process of adding a large amount cannot guarantee suf

Method used

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  • Method for comprehensively recycling manganese, lead, silver and selenium from manganese anode slime

Examples

Experimental program
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Effect test

Embodiment 1

[0053] The zinc anode slime whose composition is: Mn 45.18wt%, Pb6.65wt%, Ag0.0694wt%, Se0.27wt%, Fe0.24wt%, Ca0.42wt%, Mg0.43wt% is comprehensively recycled.

[0054] Manganese anode slime, 1.3 times the required theoretical amount of lead sulfide concentrate containing 60wt% Pb, and ball milling liquid are wet ball milled to a particle size of 85% and pass -180 mesh, and then acidic solution is added to make the solid-liquid mass ratio 1:10 Carry out leaching, add activator ferric sulfate at 0.5g / L in the process of heating up, when solution temperature reaches 85 ℃, react for 8h, measure the pH of leaching end-point to be 1.5, after filtering, obtain manganese and selenium respectively 48.93g / L and 48.93g / L and 0.257g / L manganese sulfate solution and lead-silver leaching slag, containing Pb62.95wt% in the lead-silver leaching slag, used as raw materials for lead smelting, wherein the recovery rates of lead and silver were 99.15wt% and 98.65wt% respectively, selenium in the l...

Embodiment 2

[0057] The zinc anode slime whose composition is: Mn 45.18wt%, Pb6.65wt%, Ag0.0694wt%, Se0.27wt%, Fe0.24wt%, Ca0.42wt%, Mg0.43wt% is comprehensively recycled.

[0058] Manganese anode slime, 1.1 times the required theoretical amount of lead sulfide concentrate containing 65wt% Pb, and ball milling liquid are wet ball milled to a particle size of 86% and pass -180 mesh, and then acidic solution is added to make the solid-liquid mass ratio 1:4 Carry out leaching, add activator ferrous sulfate by 1g / L in the process of heating up, when solution temperature reaches 90 ℃, react for 15h, measure the pH of leaching end-point to be 2, obtain manganese and selenium after filtering and be respectively 110.95g / L and selenium. 0.662g / L manganese sulfate solution and lead-silver leaching slag, containing Pb66.18wt% in the lead-silver leaching slag, used as raw materials for lead smelting, wherein the recovery rates of lead and silver were 99.29wt% and 98.85 wt% respectively, selenium in the...

Embodiment 3

[0061] The zinc anode slime whose composition is: Mn 45.18wt%, Pb6.65wt%, Ag0.0694wt%, Se0.27wt%, Fe0.24wt%, Ca0.42wt%, Mg0.43wt% is comprehensively recycled.

[0062] Manganese anode slime, 1.2 times the required theoretical amount of lead sulfide concentrate containing 70wt% Pb, and ball milling liquid are wet ball milled to a particle size of 88% and pass -180 mesh, and then acidic solution is added to make the solid-liquid mass ratio 1:7 Carry out leaching, add activator ferrous sulfate at 0.7g / L during the heating process, when the temperature of the solution reaches 88°C, react for 10h, the pH of the leaching end point is measured to be 1.7, and the manganese and selenium are respectively 63.52g / L after filtration. and 0.35g / L manganese sulfate solution and lead-silver leaching slag, containing Pb65.38wt% in the lead-silver leaching slag, as the raw material for lead smelting, wherein the recovery rate of lead-silver is 99.18wt% and 98.60 wt% respectively, in the leachate...

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Abstract

The invention provides a method for comprehensively recycling manganese, lead, silver and selenium from manganese anode slime. The method comprises the steps that firstly, the manganese anode slime, lead sulfide concentrate and ball milling liquid are mixed and subjected to wet-type ball milling; secondly, leaching of valuable metals such as manganese and selenium is conducted, leachate is reserved, and leached residues serve as lead smelting raw materials for recycling lead and silver; thirdly, a calcium-magnesium removing agent is added for impurity removing; and fourthly, a neutralizer, namely, ammonium hydroxide, and ammonium sulfate are added, a cleaning agent, namely, sodium dimethyl dithiocarbamate is dropwise added, and after stewing is conducted, activated carbon is added for adsorption, filter pressing is conducted, an electrolyzing additive is dropwise added into filtrate, and electrolytic manganese metal is prepared through electrolyzation. The method is small in investment, simple in technology, low in cost and capable of effectively increasing the comprehensive recovery rate.

Description

technical field [0001] The invention relates to a method for comprehensively recovering manganese, lead, silver and selenium from manganese anode slime, in particular to a method for recovering valuable metal manganese by using manganese electrowinning anode slime as a raw material and adopting an efficient and green all-wet process , lead, silver and selenium methods. The utility model belongs to the technical field of resource recycling and circular economy. [0002] technical background [0003] Manganese ore and its deep-processing products are widely used in various fields of the national economy. 90% of manganese is consumed in the iron and steel industry, and 10% is used in nonferrous metallurgy, chemical industry, electronics and other sectors. The demand for it continues to grow with the rapid development of my country's economy. The production of manganese metal in my country mainly adopts the electrolysis method. During the electrolysis production process, a large...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B3/06C22B3/08C22B3/44C25C1/10
CPCC22B3/06C22B3/08C22B3/44C22B7/007C25C1/10Y02P10/20
Inventor 廖贻鹏刘一宁林文军
Owner ZHUZHOU SMELTER GRP
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