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Zinc oxide flotation recovery method based on combination of gravity and flotation selection and pre-desliming

A recovery method, zinc oxide technology, applied in chemical instruments and methods, flotation, mechanical material recovery, etc., can solve problems such as large number of desliming tanks, poor foam outflow, excessive foam volume, etc., and achieve high efficiency and stability The effect of removal

Active Publication Date: 2022-02-18
CHINA MINMETALS CHANGSHA MINING RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, flotation desliming is only suitable for ores with low mud content. Once the amount of slime is too large, there will be too many desliming tanks and too much foam. Production management brings great trouble

Method used

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  • Zinc oxide flotation recovery method based on combination of gravity and flotation selection and pre-desliming
  • Zinc oxide flotation recovery method based on combination of gravity and flotation selection and pre-desliming
  • Zinc oxide flotation recovery method based on combination of gravity and flotation selection and pre-desliming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1 provides a kind of zinc oxide flotation recovery method based on refloating joint desliming in advance, comprises the following steps:

[0055] S1. Pretreat the zinc oxide ore to be selected to obtain ore powder, mix the ore powder and water to obtain a primary slurry; the mass fraction of the ore powder in the primary slurry is 36%; the solid particles with a particle size of less than 0.074mm in the primary slurry account for the ore powder 69% of the total mass;

[0056] S2. Carrying out the zinc sulfide flotation process of once roughing, twice sweeping, and twice selected zinc sulfide flotation process on the primary pulp obtained in step S1, to obtain zinc sulfide concentrate and zinc sulfide tailings, specifically comprising the following steps:

[0057] S21. Add sulfur 250g / t copper acid copper, 50g / t butyl sodium xanthate, and 17g / t pinitol to the primary pulp, and perform zinc sulfide roughing for 3 minutes to obtain zinc sulfide roughing concentr...

Embodiment 2

[0079] Embodiment 2 provides a zinc oxide flotation recovery method based on heavy flotation combined with desliming in advance. Compared with Example 1, the difference is that the dosage of chemicals in each step is adjusted. The specific adjustments are as follows, and the rest are the same as those in the implementation Example 1 is roughly the same, and will not be repeated here.

[0080] In step S2, 200g / t of copper sulfate, 40g / t of butyl sodium xanthate and 15g / t of terpineol oil are used for zinc sulfide roughing agent, 20g / t of butyl sodium xanthate for the first zinc sulfide sweeping agent, and 20g / t of butyl sodium xanthate for the first time. Secondary zinc sulfide sweep agent butyl sodium xanthate 10g / t, first zinc sulfide selective agent water glass 200g / t;

[0081] In step S4, the flotation desliming agent is 50 g / t of butyl sodium xanthate, and 50 g / t of Lp-1 agent;

[0082] In step S5, zinc oxide first roughing agent sodium carbonate 3000g / t, water glass 2500...

Embodiment 3

[0087] Embodiment 3 provides a zinc oxide flotation recovery method based on heavy flotation combined with desliming in advance. Compared with Embodiment 1, the difference is that the mass percentage of ore powder in the primary slurry in step S1 is adjusted and is less than 0.074mm The mass percentage of mineral powder, the concentration of secondary pulp in step S4, and the dosage of chemicals in each step are specifically adjusted as follows, and the rest are roughly the same as in Example 1, and will not be repeated here.

[0088] In step S1, the mass percentage of ore powder in the primary slurry is not more than 33%, and the mass percentage of ore powder less than 0.074mm is 71%;

[0089] In step S2, copper sulfate 300g / t, butyl sodium xanthate 60g / t and terpineol oil 20g / t are used for zinc sulfide roughing agent, butyl sodium xanthate 30g / t for the first zinc sulfide sweeping agent, and butyl sodium xanthate 30g / t for the first time. Secondary zinc sulfide sweep agent ...

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Abstract

The invention provides a zinc oxide flotation recovery method based on the combination of gravity and flotation selection and pre-desliming. The zinc oxide flotation recovery method comprises the steps that to-be-separated zinc oxide ore is pretreated and then mixed with water, and primary ore pulp is obtained; a zinc sulfide flotation process is performed on the primary ore pulp to obtain zinc sulfide concentrate and zinc sulfide tailings; the zinc sulfide tailings are subjected to cyclone series connection grading gravity separation desliming, and gravity separation mud and settled sand are obtained through separation; water is added into the settled sand for adjustment to obtain secondary ore pulp, and a flotation desliming process is carried out on the secondary ore pulp to obtain flotation slime and flotation deslimed tailings; and the flotation deslimed tailings are subjected to a zinc oxide flotation process, and zinc oxide concentrate and tailings are obtained. According to the method, in the zinc oxide flotation recovery process, the cyclone series connection grading gravity selection and flotation selection combined desliming process is adopted, the efficient and stable removal of slime is achieved, a good ore pulp environment is created for flotation recovery of the refractory zinc oxide ore, zinc resources in the ore are recovered to the maximum extent, and the method has important practical significance on development and utilization of refractory zinc oxide resources.

Description

technical field [0001] The invention relates to the technical field of zinc oxide recovery, in particular to a zinc oxide flotation recovery method based on refloatation combined with pre-desliming. Background technique [0002] With the rapid development of the national economy, the easy-to-select zinc sulfide ore is less and less, and the development and utilization of difficult-to-select zinc oxide resources is becoming more and more important. Zinc oxide minerals are mostly carbonates or silicates, such as smithsonite and hemimorphite, etc. These minerals are brittle, often intercalated with other oxide minerals or gangues in very fine grains, and contain a large amount of primary ore In the process of ore grinding, secondary slimes will also be produced. The existence of these slimes will increase the consumption of reagents in the flotation process of zinc oxide ore and may cause the phenomenon of "covering", which affects the floating of zinc oxide, and then Affect t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B7/00B03D1/018B03D101/02B03D103/02
CPCB03B7/00B03D1/018B03D2201/02B03D2203/02Y02W30/52
Inventor 祁忠旭翟旭东冯程孙大勇王龙王硕韩远燕江旭肖舜元李杰宋水祥欧阳林莉陈巧妹石青朱志伟周浩
Owner CHINA MINMETALS CHANGSHA MINING RES INST