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Grinding while floatation process for carrying out floatation separation in grinding

A process method, side grinding technology, applied in flotation, solid separation, etc., can solve the problems of low recovery rate of buoyant minerals, covered by oil film or scale film, and reduced mineral buoyancy, etc., to achieve significant economic Benefits and social benefits, reducing wear and power consumption, and increasing production capacity

Inactive Publication Date: 2003-03-12
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sometimes it can be up to 1-2 days. During the conveying process of the slurry, the fresh and lively surface of the buoyant mineral particles may be polluted—covered by oil film or scale film, sulfide may be oxidized, etc. All these changes will It causes the decrease of the floatability of the minerals and reduces the beneficiation recovery rate of the floatable minerals. This is a problem existing in the traditional grinding-flotation process. It has been unresolved and makes it impossible to realize the dream of discarding a large amount of tailings at the grinding stage

Method used

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  • Grinding while floatation process for carrying out floatation separation in grinding
  • Grinding while floatation process for carrying out floatation separation in grinding
  • Grinding while floatation process for carrying out floatation separation in grinding

Examples

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Effect test

Embodiment 1

[0042] The ore used is low sulfide arsenic gold ore. The main metal sulfides in the ore are pyrite and arsenopyrite. The gangue minerals are mainly quartz, followed by chlorite sericite and feldspar. The ore contains: Au11.5g / t, Ag2.3g / t, As1 .35%, S3.1%, Sb41.3g / t, Hg0.048g / t, Cu0.009%, Pb0.006%, Zn0.011%, Fe3.96%, Ca1.89%. The natural gold particle size in the ore is very fine, micro-grained gold accounts for 20.91%, submicroscopic gold accounts for 70.6%, sulfide-enclosed gold accounts for 69.23%, and gangue-enclosed gold accounts for 14.49%.

[0043] First, the 100-200mm large ore is crushed to -3mm by the jaw crusher and the roller crusher, and then fed into the tower grinding flotation machine through the ore feeder, and the ore feeding speed is 2kg / hr. At the same time, the pH adjuster Na 2 CO 3 Add in the amount of 500g / t, add butyl black drug collector at 40g / t, add butyl xanthate at 80g / t, add water at a solid-liquid ratio of 1:2, and add 40g / t of 2# oil foaming a...

Embodiment 2

[0054] The ore used is low sulfide arsenic gold ore. The ore contains: Au8.5g / t, Ag15.8g / t, C4.51%, CaO9.29%, S1.75%, Fe3.41%, Zn0.19%, Cu0.018%, Pb0.065% , As0.55%, SiO 2 : 49.31%, Al 2 o 3 7.5%, MgO5.80%. More than 80% of the gold distribution is invisible gold, the most important gold-bearing mineral is arsenopyrite, accounting for 72.8% of invisible gold, followed by pyrite and other sulfide minerals, accounting for 12.46% of invisible gold. 20% is visible gold, but its particle size is also very fine, below 10 microns, distributed in gangue, pyrite, arsenopyrite, black copper ore and galena.

[0055] First, the 100-200mm large ore is crushed to -3mm by the jaw crusher and the roller crusher, and then fed into the tower grinding flotation machine through the ore feeder, and the ore feeding speed is 2kg / hr. At the same time, the pH regulator CaO is added at 5kg / t, the collector butyl xanthate is added at 120g / t, water is added at a solid-liquid ratio of 1:2, and 2# oil...

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Abstract

A process for grinding and hydrosizing ore at same time includes crushing raw ore, feeding it into tower-type grinding floatation machine while adding pH regulator, supprssor and collector, grinding while hydrosizing, collecting froth, refining in fine floatation machine, returning tail sand back to grinding floatation machine, collecting the tail sand of grinding floatation machine, scavenging in the scavenging floatation machine, and returning the scavenged froth back to the grinding floatation machine. Its advantages are short process flow and high recovery yield.

Description

Technical field: [0001] The invention relates to the flotation of minerals, specifically a new process for flotation, enrichment and processing of the buoyant minerals, which completes the flotation separation of the buoyant minerals while grinding the buoyant minerals. Background technique: [0002] In today's world, more than 90-95% of the ore needs to be enriched through ore dressing before it can be used in metallurgy and other industries, which requires a large number of mine dressing plants. Among these mine beneficiation plants, the number of flotation plants accounts for more than 30-40%. The existing flotation plants, whether domestic or foreign, use the traditional grinding-flotation process. [0003] The principle flow of transmission grinding-flotation process is as follows: figure 1 As shown, the raw ore containing the target buoyant minerals is crushed and sent to the grinding machine (horizontal ball mill) for grinding; the grinding products enter the classi...

Claims

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Application Information

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IPC IPC(8): B03D1/16
Inventor 孟宇群吴敏杰宿少玲
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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