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Method for recovering gold from cyanide tailings
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A technology for cyaniding tailings and recovering gold, which is applied in the field of gold recovery, can solve problems such as poor recovery effect and incomplete removal of cyanide, and meet the requirements of industrial production, wide adaptability of ore properties, and simple process operation Effect
Active Publication Date: 2019-09-13
长沙三博矿业科技有限公司
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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
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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 oxidized minerals, the gold distribution ratios are 43% and 20% respectively, the content of single gold and associated gold is 37%, the sulfide minerals are mainly pyrite, and the gangues in the ores are mainly quartz, Gypsum, mica and feldspar, the gold that is easy to reclaim is the gold in monomer gold and intergrowth gold and sulfide mineral, utilize the method that the present invention provides a kind of recovery gold from cyanide tailings, process flow chart is as figure 1 As shown, the specific steps are as follows:
[0039] (1) Pretreatment of cyanide tailings: the raw ore sample of cyanide tailings is made into pulp with a mass concentration of about 50%, and impurities such as sand, stones, and sawdust are removed with a stainless steel sampling sieve with a sieve size of 0.147mm, and the pulp under the sieve is Adjus...
Embodiment 2
[0048] The main valuable element in the cyanidation 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, and the distribution ratios of gold are 68% and 32% respectively. The sulfide minerals are mainly pyrite with a small amount of chalcopyrite, and the gangues are mainly quartz, calcite, mica and feldspar. The gold that is easy to reclaim is the gold in sulfide minerals, utilize the present invention to provide a kind of method that reclaims gold from cyanide tailings, concrete steps are as follows:
[0049] (1) Pretreatment of cyanide tailings: the raw ore sample of cyanide tailings is made into pulp with a mass concentration of about 50%, and impurities such as sand, stones, and sawdust are removed with a stainless steel sampling sieve with a sieve size of 0.147mm, and the pulp under the sieve is Adjust the slurry to a mass concentration of 40%, adjust the slurry t...
Embodiment 3
[0059]Industrial test:
[0060] Adopt the cyanide tailings pretreatment and flotation process of embodiment 1, industrial production test daily treatment capacity is 300 tons, and flotation result is as 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 obtains results similar to laboratory selectivity tests. The gold grade and recovery rate in the concentrate reach 16.27g / t and 70.61%, respectively, and the economic benefits are remarkable.
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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 in particular relates to a method for recovering gold from cyanide tailings. Background technique [0002] The cyanide gold extraction method is the mainstream technology for gold extraction in gold mines. The widespread application of the cyanide gold extraction method in gold beneficiation plants in my country has produced a large amount of cyanide tailings. Cyanide tailings contain many valuable elements such as gold, silver, copper, lead, zinc, etc., and are an available secondary resource. At the same time, cyanidation tailings contain some heavy metal ions, cyanide and residual flotation reagents, and their long-term storage in large quantities will pollute the environment. In recent years, many researchers have studied the extraction of gold from cyanide tailings. However, due to the addition of sodium cyanide, lime, bleaching powder and other agents in the production proce...
Claims
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