Differential flotation process for sphalerite

A sphalerite and flotation technology, used in flotation, solid separation, etc., can solve the problems of high chemical cost, lead flotation interference, large metal loss, etc. The effect of improving the volume and quality of the foam

Active Publication Date: 2021-08-27
GUANGXI ZHONGJIN LINGNAN MINING CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] (1) Use macromolecule inhibitors such as gull gum and dextrin to suppress the buoyancy of this type of gangue, and reduce the interference to zinc flotation (such as Li Guodong's "Technology and Process for Separating Lead-Zinc Mixed Concentrates by Suppressing Lead and Leaving Zinc" Mechanism Research"; such as the beneficiation method of high-sulfur lead-zinc ore disclosed in Chinese patent CN202010620631.9), but the cost of the reagent is high, and the residue of the reagent enters the beneficiation wastewater, and the reuse of the beneficiation wastewater is easy to interfere with the lead flotation;
[0005] (2) Change the process structure, such as desliming in advance, releasing part of the middle ore with high muddy quality and transporting it to the tailings (Yu Zhenghua's "Selective Flocculation Flotation Method to Treat a Low-grade Sulfur-Oxygen Mixed Lead-Zinc Ore Mineral Processing Experimental Research "), but this method can easily lead to a large amount of metal loss in the tailings, which is not conducive to the improvement of the overall economic benefits

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  • Differential flotation process for sphalerite

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Embodiment 1

[0029] A complex sulfur-oxygen mixed refractory lead-zinc ore in Guangxi contains light gangue minerals such as dolomite and calcite with a mineral content of about 60%. At the same time, due to the fine-grained distribution of useful minerals, the embedded distribution characteristics and symbiotic relationship are complex; After grinding the ore whose grinding fineness is -0.074mm and accounts for 70%-75% of the total ore content, there are still a large number of associated organisms. If the fineness of ore grinding is simply increased, it will cause accelerated mudification of light gangue minerals, resulting in an increase in the dosage of flotation agents, deterioration of indicators, waste of natural resources, and is not conducive to the economic benefits of enterprises.

[0030] At present, after the completion of the lead selection operation, the zinc selection process is a sequence of roughing, second sweeping and fourth fineness returning to the process. The above-...

Embodiment 2

[0042]The ore selected in this embodiment is a large amount of fine-grained sulfur-oxygen mixed complex refractory lead-zinc sulfide ores such as dolomite and calcite. The raw ore contains 0.74% lead, 2.81% zinc, 6.9% sulfur, and 62% dolomite; The metal minerals of the ore are mainly pyrite, sphalerite, galena, pyrite, white lead ore and trace tetrahedrite, bornite, magnetite, smithsonite, arsenopyrite, etc. The gangue minerals are mainly dolomite, followed by barite, a small amount of quartz, garnet, calcite, feldspar, gypsum, mica and trace amounts of apatite, kaolinite, tourmaline, etc. The main metal minerals have fine intercalation particle size, complex relationship and low monomer dissociation degree.

[0043] This embodiment provides a fractional speed flotation process of sphalerite, according to the attached figure 1 The ore is processed by the beneficiation process shown, and the beneficiation steps are as follows:

[0044] (1) Ore preparation, ore grinding, and l...

Embodiment 3

[0053] The ore selected in this embodiment is a large amount of fine-grained sulfur-oxygen mixed complex refractory lead-zinc sulfide ores such as dolomite and calcite. The raw ore contains 0.81% lead, 2.70% zinc, 6.9% sulfur, and 59% dolomite; The metal minerals of the ore are mainly pyrite, sphalerite, galena, pyrite, white lead ore and trace tetrahedrite, bornite, magnetite, smithsonite, arsenopyrite, etc. The gangue minerals are mainly dolomite, followed by barite, a small amount of quartz, garnet, calcite, feldspar, gypsum, mica and trace amounts of apatite, kaolinite, tourmaline, etc. The main metal minerals have fine intercalation particle size, complex relationship and low monomer dissociation degree.

[0054] This embodiment provides a fractional speed flotation process of sphalerite, according to the attached figure 1 Shown beneficiation process processes this ore, concrete steps are as follows:

[0055] (1) Ore preparation, ore grinding, and lead sorting operation...

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Abstract

The invention discloses a differential flotation process for sphalerite, and belongs to the technical field of lead-zinc ore flotation. The method comprises the following steps that original roughing is divided into two sections (first roughing and second roughing), the first roughing is that sphalerite which is good in floatability, less in entrainment and high in grade enters second zinc refining operation, the second roughing is that sphalerite which is poor in floatability and more in entrainment enters the first zinc refining operation, middling of the first zinc refining is reground, and after the dissociation degree is increased, the second zinc roughing is returned. Aiming at the condition that the grade of the zinc concentrate is influenced by a large amount of light minerals such as dolomite and calcite contained in the micro-fine particle sulfur-oxygen mixed complex continuous lead-zinc ore, a process different from a traditional ore dressing process is adopted, ore concentrate inclusion can be effectively reduced, the grade of the zinc concentrate is improved, the process circulation amount is reduced, the equipment load is reduced, and a better flotation index is obtained.

Description

technical field [0001] The invention relates to the technical field of complex sulfur-oxygen mixed lead-zinc ore flotation, in particular to a sphalerite fractional-speed flotation process. Background technique [0002] In the flotation process of lead-zinc ore, the refractory lead-zinc ore containing light and easy-to-float gangue has a high content of secondary slime and a large specific surface area of ​​the slime. In the beneficiation process, there are often prominent problems such as serious floating mud inclusions, large medium ore circulation, poor flotation stability, and low grade zinc concentrate. [0003] At present, for the beneficiation process of fine-grained lead-zinc ores containing high shale, in order to eliminate the interference of light and easy-to-pumice gangue such as dolomite and calcite, the following two processing methods are often used: [0004] (1) Use macromolecular inhibitors such as gull gum, dextrin to suppress the buoyancy of this type of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/018B03D101/02B03D103/04
CPCB03D1/018B03D2201/02B03D2201/007B03D2203/04Y02W30/52
Inventor 刘兵钟旭群何晋勇占小龙钟春林苏振华韦炳强李小元王颢敏
Owner GUANGXI ZHONGJIN LINGNAN MINING CO LTD
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