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Method for recovering gold from cyaniding tailings

A technology for cyaniding tailings and recovering gold, which is applied in the field of gold recovery, can solve the problems of incomplete removal of cyanide and poor recovery effect, and meet the requirements of industrial production, wide adaptability of ore properties and the best effect Effect

Active Publication Date: 2018-04-24
长沙三博矿业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method realizes the comprehensive utilization of mineral processing tailings and clean production in the mineral processing process, but the removal of cyanide in the mineral processing tailings is not thorough, and the method is not effective for the recovery of gold wrapped in sulfide ore

Method used

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  • Method for recovering gold from cyaniding tailings
  • Method for recovering gold from cyaniding tailings
  • Method for recovering gold from cyaniding tailings

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The main valuable element in a cyanide tailings in Jiangxi is gold, and the gold grade is 3.21g / t. Gold mainly occurs in sulfide minerals and oxide minerals. The gold distribution rates are 43% and 20%, respectively. The content of single gold and contiguous gold is 37%. The sulfide minerals are mainly pyrite, and the gangue in the ore is mainly quartz, Gypsum, mica and feldspar, the gold that is easy to recover is monomer gold, conjoined gold, and gold in sulfide minerals. The present invention provides a method for recovering gold from cyanide tailings. The process flow chart is as follows figure 1 As shown, the specific steps are as follows:

[0039] (1) Pretreatment of cyanidation tailings: the original cyanidation tailings sample is made into a slurry with a mass concentration of about 50%, and a stainless steel sample sieve with a mesh size of 0.147mm is used to remove impurities such as sand and wood chips. The slurry under the sieve Adjust the slurry to a mass con...

Embodiment 2

[0048] The main valuable element in the cyanide tailings of a microbial pretreatment-all-slime cyanidation process in Shandong is gold, and the gold grade is 4.35g / t. Gold mainly occurs in sulfides and gangues. The distribution rates of gold are 68% and 32% respectively. The sulfide minerals are mainly pyrite with a small amount of chalcopyrite. The gangues are mainly quartz, calcite, mica and feldspar. The gold that is easily recovered is gold in sulfide minerals. The present invention provides a method for recovering gold from cyanide tailings. The specific steps are as follows:

[0049] (1) Pretreatment of cyanidation tailings: the original cyanidation tailings sample is made into a slurry with a mass concentration of about 50%, and a stainless steel sample sieve with a mesh size of 0.147 mm is used to remove impurities such as sand and wood chips. The slurry under the sieve Adjust the slurry to a mass concentration of 40%, use sulfuric acid to adjust the pH of the slurry to 5...

Embodiment 3

[0059] Industrial test:

[0060] Using the cyanide tailings pretreatment and flotation process of Example 1, the daily throughput of the industrial production test is 300 tons, and the flotation results are shown in Table 3:

[0061] Table 3 Flotation results of industrial tests

[0062]

[0063] Industrial test results show that the method of the present invention is successfully industrialized, and results similar to laboratory selectability tests are obtained. The gold grade and recovery rate in the concentrate reach 16.27 g / t and 70.61%, respectively, and the economic benefits are significant.

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PUM

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Abstract

The invention discloses a method for recovering gold from cyaniding tailings. The method comprises the following steps that (1) pretreatment is carried out on raw ores, namely impurities of the cyaniding tailings are removed, then filter pressing and pulp-making are carried out, and grinding is carried out to a preset fineness; (2) rough selection operation is carried out, the ore pulp obtained inthe step (1) is roughly selected, xanthate Y-89 and YP-35 serve as collecting agents, and rough concentrate and rough tailings are obtained after rough selection; (3) scavenging operation is carriedout, namely step-by-step scavenging is carried out on the rough tailings; and (4) selecting operation is carried out, namely step-by-step selection operation is carried out on the rough concentrate soas to finally obtain gold concentrate. According to the method for recovering the gold from the cyaniding tailings, the combined collecting agents of the Y-89 and the YP-35 are utilized, and combinedinhibitors of sodium silicate and Linx 385 are added at the same time, so that the problem that the gold in the existing cyaniding tailings is difficult to effectively recover is solved; the processis simple to operate, the dosage of the medicament is small, the cost is low, and industrial production requirements are met; and compared with other methods, the method for recovering the gold from the cyaniding tailings is capable of obviously improving the grade and the recovery rate of the gold in the gold concentrate, capable of achieving an optimal flotation effect on the gold which is wrapped in sulfide ores, less affected by the insetting grain size of the gold and wide in adaptability to ore properties.

Description

Technical field [0001] The invention belongs to the technical field of mineral processing, and particularly relates to a method for recovering gold from cyanidation tailings. Background technique [0002] Cyanide gold extraction is the mainstream technology for gold extraction in gold mines. The wide application of cyanide gold extraction in my country's gold concentrators produces a large amount of cyanide tailings. The cyanide tailings contain gold, silver, copper, lead, zinc and other valuable elements, which is a kind of usable secondary resource. At the same time, the cyanide tailings contain some heavy metal ions, cyanide and residual flotation reagents, and their long-term storage in large quantities will cause environmental pollution. In recent years, many researchers have studied gold extraction from cyanide tailings. However, due to the addition of sodium cyanide, lime, and bleaching powder in the production process of cyanide Significant changes have taken place, esp...

Claims

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Application Information

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IPC IPC(8): B03D1/012B03D1/018B03D1/002B03D1/008B03B1/00B03B1/04B03D101/02B03D101/04B03D101/06B03D103/02
Inventor 朱文龙王金虎彭志兵张博邹松张平
Owner 长沙三博矿业科技有限公司