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Sulfur concentrate recovery process in pre-cavitation and sulfur flotation of zinc oxidative pressure leaching residue

An oxygen pressure leaching and pretreatment technology, which is applied in the field of comprehensive recycling of non-ferrous metal smelting, can solve the problems of difficulty in comprehensive and efficient recovery of Ag and Sn, low recovery rate of elemental sulfur, high energy consumption of sulfur, etc., and achieves stable and efficient recovery of flotation process The effect of high efficiency and simple process

Active Publication Date: 2014-01-22
KUNMING METALLURGY INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sulfur grade of sulfur concentrate during leaching slag flotation is low (~80%, elemental sulfur content ~72%), resulting in a large amount of slag during hot-melt filtration of sulfur concentrate and low recovery rate of elemental sulfur, so that the unit product The disadvantages of high energy consumption of sulfur; at the same time, during the flotation of sulfur concentrate in the leaching slag, the Ag and Sn in the leaching slag are dispersed in the sulfur concentrate and the tailings after flotation of the sulfur concentrate. Efficient recycling poses a relatively large difficulty

Method used

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  • Sulfur concentrate recovery process in pre-cavitation and sulfur flotation of zinc oxidative pressure leaching residue
  • Sulfur concentrate recovery process in pre-cavitation and sulfur flotation of zinc oxidative pressure leaching residue
  • Sulfur concentrate recovery process in pre-cavitation and sulfur flotation of zinc oxidative pressure leaching residue

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1. The ore sample is the oxygen pressure leaching slag of a certain zinc smelter. The test adopts three processes: traditional direct flotation, ore grinding flotation process and cavitation pretreatment flotation closed-circuit process, wherein the flotation closed-circuit process is a rough Selection, 4-segment selection, 2-segment scanning, such as image 3 , 4 , 5 shown.

[0032] The optimum grinding fineness condition is: the grinding fineness is (-325 mesh)>70%.

[0033] The cavitation pretreatment process conditions are as follows: water pump cavitation is used for pretreatment, the water pump pressure is 4.5MPa, the mass ratio of slurry to solid is 7:1, the cavitation pretreatment temperature is 25°C, and the time is 3h.

[0034] Flotation conditions: ① The concentration of the flotation pulp is 35%; ② The roughing conditions are: the dosage of water glass is 6500g / t, the dosage of copper sulfate is 300g / t, the dosage of butyl xanthate is 170g / t, 2 # ...

Embodiment 2

[0040] Example 2. The ore sample is the oxygen pressure leaching slag of a certain zinc smelter. The test adopts three kinds of processes: traditional direct flotation, ore grinding flotation process and cavitation pretreatment flotation closed-circuit process, wherein the flotation closed-circuit process is a rough Selection, 4-segment selection, 2-segment scanning, such as image 3 , 4 , 5 shown.

[0041] The optimum grinding fineness condition is: the grinding fineness is (-325 mesh)>70%.

[0042] The cavitation pretreatment process conditions are as follows: the cavitation propeller is used for pretreatment, the cavitation propeller speed is 7000r / min, the liquid-solid ratio of the slurry is 5:1, the cavitation pretreatment temperature is 35°C, and the time is 0.5h.

[0043] Flotation conditions: ①The concentration of the flotation pulp is 42%; # The amount of oil used is 20g / t, ③Selection conditions: the amount of selected I water glass is 600g / t; the amount of selecte...

Embodiment 3

[0049] Example 3. The ore sample is the oxygen pressure leaching slag of a certain zinc smelter. The test adopts three processes: traditional direct flotation, ore grinding flotation process and cavitation pretreatment flotation closed-circuit process, wherein the flotation closed-circuit process is a rough Selection, 4-segment selection, 2-segment scanning, such as image 3 , 4 , 5 shown.

[0050] The optimum grinding fineness condition is: the grinding fineness is (-325 mesh)>70%.

[0051] The cavitation pretreatment process conditions are as follows: cavitation propeller is used for pretreatment, the speed of cavitation propeller is 5000r / min, the liquid-solid ratio of slurry is 3:1, the cavitation pretreatment temperature is 50℃, and the time is 1h;

[0052] Flotation conditions: ①The concentration of the flotation pulp is 42%; # The amount of oil used is 20g, ③Selection conditions: the amount of selected Ⅰ water glass is 700g / t; the amount of selected Ⅱ water glass is ...

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Abstract

The invention provides a sulfur concentrate recovery process in pre-cavitation and sulfur flotation of zinc oxidative pressure leaching residue. The sulfur concentrate recovery process in pre-cavitation and sulfur flotation of zinc oxidative pressure leaching residue includes the steps of firstly, slurrying complex oxidative pressure leaching residue containing sulfur, zinc, lead, sliver and the like; secondly, subjecting prepared slurry to pre-cavitation; and thirdly, slurrying the oxidative pressure leaching residue subjected to the pre-cavitation, feeding slurry into a flotation tank for floatation, and performing roughing, cleaning and scavenging to obtain floatation sulfur concentrate and tailing. The process combining pre-cavitation and sulfur floatation is stable in flotation. Recovery rate and concentrate level in closed-loop flotation flow are increased evidently. The quality of the sulfur concentrate is improved by 10-15% and reaches 90-97%. Sulfur recovery rate is increased by 5-10% and reaches 91-98%. Quality of Ag in the tailing is increased from about 260g / t to 520g / t-560g / t, and the recovery rate is increased from about 65% to about 96%. The sulfur concentrate recovery process achieves separation of elemental sulfur and Ag, reduces quantity stockpiling of the oxidative pressure leaching residue and provides a great advantage for comprehensive recovery of various elements.

Description

Technical field: [0001] The invention belongs to the field of comprehensive recovery and utilization of non-ferrous metal smelting, and in particular relates to a process for recovering sulfur concentrate from zinc oxygen pressure leaching slag by cavitation pretreatment and sulfur flotation. Background technique: [0002] Among the zinc resources in my country, lead-zinc ore deposits have complex material components and many associated components, and their comprehensive utilization value is high. Zinc concentrates are commonly associated with valuable elements such as Cu, Fe, S, Ag, Au, Sn, In, Ga and Ge. my country is rich in polymetallic-associated high-speed sphalerite resources. The zinc metal reserves of high-speed sphalerite are more than 20 million tons. It may become an important zinc smelting resource in my country in the future. [0003] Co-associated polymetallic high-iron sphalerite is easy to form zinc ferrite when it is treated by traditional boiling roasting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/04C22B3/04C01B17/06
CPCY02P10/20
Inventor 杨大锦李晓阳刘俊场张晶付维琴刘玫华
Owner KUNMING METALLURGY INST
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