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Combined process for recovering antimony, lead and gold from multi-metal tailings

A combined process and multi-metal technology, which is applied in the combined process of lead and gold, and the field of antimony recovery, can solve the problems of gangue mineral mechanical entrainment aggravation, high slime content, and difficult recovery of valuable elements, so as to save chemicals and electricity consumption, shorten the flotation process, and eliminate adverse effects

Active Publication Date: 2020-06-26
有研资源环境技术研究院(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to recover the valuable elements lost in the slime. Another important reason is that the slime generally has high content, low quality, high surface energy and high activity. If it is directly flotation, it will non-selectively adsorb the collector. While consuming a large amount of reagents, the flotation foam is sticky, and the mechanical entrainment of gangue minerals is aggravated, and even flotation cannot be carried out

Method used

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  • Combined process for recovering antimony, lead and gold from multi-metal tailings
  • Combined process for recovering antimony, lead and gold from multi-metal tailings
  • Combined process for recovering antimony, lead and gold from multi-metal tailings

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Embodiment 1

[0023] In the tailings of a polymetallic mine in Weixi, Yunnan, Sb 0.40%, Pb 0.37%, S1.06%, Au 0.34g / t. The main metal minerals are pyrite, stibnite and galena; the main gangue minerals are quartz, calcite, potassium feldspar and sericite. The ore structure mainly includes porphyritic structure, microscopic scale structure, heteromorphic granular structure, fine granular structure, inclusion structure and so on.

[0024] Using the process of the present invention, the tailings material is slurried and scrubbed in the mixing tank, the stirring concentration is 15% (weight ratio), and the stirring intensity is 1700r / min; adding hydrolyzed polyacrylamide and sodium fluoride (weight ratio is 3: 1), the total dosage of the agent is 16g / t, and the ultrafine purification classifier is used for desliming, the concentration is 10% (weight ratio), and the working pressure is 0.70MPa; the grit enters the hydrocyclone for classification, and the hydrocyclone The underflow is ground by a ...

Embodiment 2

[0030] Tailings of a polymetallic mine in Xiangxi, Hunan, the tailings mainly include pyrite, arsenopyrite, stibnite, galena, wheel ore, etc.; the gangue minerals are mainly quartz, sericite, calcite, chlorite, kaolin Wait. Sb 0.60%, Pb 0.51%, S 2.42%, Au 0.36g / t in the ore.

[0031] Utilizing the process of the present invention, the tailings material is slurried and scrubbed in the mixing tank, the stirring concentration is 15% (weight ratio), and the stirring intensity is 2200r / min; Fine purification and classifier desliming, the concentration is 12% (weight ratio), working pressure is 0.75MPa; the sand settling enters the hydrocyclone for classification, and the underflow of the hydrocyclone is ground by a ball mill, and the grinding fineness is -0.038 μm 82%, hydrocyclone overflow for flotation, before flotation, adjust the slurry concentration to 33% (weight ratio), adjust the pH to 7.5 with sodium carbonate, the dosage of sodium carbonate is 500g / t, activator copper su...

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Abstract

The invention discloses a combined process for recovering antimony, lead and gold from multi-metal tailings. The combined process comprises the following steps: (1) pretreating the tailings, specifically, the tailings are put in a stirring barrel for slurry mixing and scrubbing, and then a flocculating agent is added for selective flocculation; (2) performing superfine purification classificationby using a superfine purification classifier to remove fine mud below 2 microns; and (3) allowing settled sand to enter a hydrocyclone for classification, grinding the classified underflow, returningto the hydrocyclone for classification, and performing classified overflow for flotation to obtain mixed concentrate. According to the process disclosed by the invention, the recovery rate of valuableelements in the tailings is greatly improved and the desliming effect is greatly improved through the measures of pretreatment of the tailings, superfine purification desliming, construction of a selective grinding loop and the like.

Description

technical field [0001] The invention relates to a combined process for recovering antimony, lead and gold from polymetallic tailings, belonging to the technical field of mineral processing. Background technique [0002] In the old tailings stockpiled by polymetallic sulfide mines in my country, there are not only precious metals, non-ferrous metals, and ferrous metal minerals, but also a large number of non-metallic minerals. Sulfide minerals also have oxidized minerals, and some sulfide minerals have been oxidized on the surface due to long-term stacking. The nature of these tailings is complex, and the value of recyclable reuse is large. For example, the particle size of lead, antimony and zinc minerals in Dachang, Guangxi is uneven, mainly fine-grained and brittle, and the gangue minerals are mainly granite with extremely high hardness. Too crushed. With continuous fine grinding, the amount of slime produced in the production process continues to increase, and part of t...

Claims

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Application Information

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IPC IPC(8): B04C9/00B03B7/00
CPCB03B7/00B04C9/00
Inventor 陈勇宋永胜李文娟张其东
Owner 有研资源环境技术研究院(北京)有限公司
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