A method for recovering gold and fine antimony minerals in flotation tailings of antimony-containing gold ore

Abstract

The invention discloses a method for recycling gold and micro-fine particle antimony minerals in antimony-containing gold ore flotation tailings. By the adoption of the method, the technical problem that if the antimony-containing gold ore flotation tailings are subjected to cyanide leaching directly, the cost is high, and the gold recovery rate is low is solved. Meanwhile, efficient recovery of associated antimony minerals can also be achieved. The method is characterized by comprising the steps that the tailings are rated, the tailings with the particle size being larger than 0.038 mm are subjected to regrinding and size mixing, copper sulfate, lead nitrate and ammonia carbonate are added sequentially as a mixed activating agent, sodium n-butylxanthate and ammonium butyl aerofloat serve as a collecting agent, No.2 oil serves as a foaming agent, and gold and the antimony minerals are recycled through flotation; and water is directly added into the tailings with the particle size being smaller than 0.038 mm for size mixing, grinding is not needed, sodium hexametaphosphate, copper sulfate, lead nitrate, ammonia carbonate, sodium n-butylxanthate, No.25 aerofloat, kerosene (or diesel oil) and No.2 oil are added in sequence, wherein the sodium hexametaphosphate serves a dispersing agent, the copper sulfate, lead nitrate and ammonia carbonate serve as an activating agent, the n-butylxanthate and No.25 aerofloat serve as a collecting agent, the kerosene (or diesel oil) serves an emulsifying agent, and the No.2 oil serves as a foaming agent, and gold and the micro-fine particle antimony minerals are recycled through flotation. The technique is reasonable, procedures are simple, the gold and antimony recovery rate is high, and industrialized implementation is easy.

Description

Technical field

[0001] The invention belongs to the field of mineral processing, and relates to a method for recovering gold and fine-grained antimony minerals in the flotation tailings of antimony-containing gold mines, which helps to strengthen the recovery of gold and fine-grained antimony minerals in the tailings, and improves the gold recovery rate. Reduce the cost of tailings leaching. Background technique

[0002] The cyanide gold extraction process has become the most widely used gold extraction process and method due to its low cost, high gold recovery rate, simple process flow and operating conditions. However, as the degree of gold mining resources in my country increases, it is easy to The mineral resources of beneficiation are decreasing year by year. According to statistics, about 60% to 70% of gold resources in the world belong to complex and difficult-to-treat gold mines, but the utilization of this part of gold resources is still low.

[0003] The combined process...

Examples

Embodiment 1

[0027] The flotation tailings of an antimony-containing gold ore in Guizhou were selected. The tailings contained 0.7g / t gold, 1.6% sulfur, 0.29% antimony, 0.92% arsenic, 1.02% carbon, and 5.8% iron; the tailings were directly leached by cyanide on site , But the gold content in the final leaching residue reaches 0.2g / t~0.4g / t, and the gold loss is serious.

[0028] Take the flotation tailings and classify them by hydrocyclone to obtain +0.038mm coarse-grain products and -0.038mm fine-grain products. The +0.038mm coarse-grain products are ground to make the particle size less than 0.074mm. Reach 85%, and then adjust the slurry concentration to 31%; based on each ton of tailings, add 200g / t copper sulfate activator, 200g / t lead nitrate, 100g / t ammonia bicarbonate, and 60g collector butyl xanthate. / t and butylamine black powder 40g / t, foaming agent No. 2 oil 30g / t, after slurry adjustment, flotation rough Ⅰ, flotation rough Ⅰ concentrate and flotation rough Ⅰ tailings are obtained...

Embodiment 2

[0031] The flotation tailings of a complex antimony-containing gold mine in Gansu were selected. The flotation tailings contained 1.2g / t gold, 1.89% sulfur, 0.83% antimony, 0.94% carbon, and 28.4% silica. The treatment process of on-site flotation tailings is direct cyanidation leaching, but the gold content in the leaching residue reaches 0.6g / t~0.8g / t.

[0032] Take the flotation tailings and classify them by hydrocyclones to obtain +0.038mm coarse-grain products and -0.038mm fine-grain products. The +0.038mm coarse-grain products are reground so that the weight percentage of the particle size is less than 0.074mm 88%, and then adjust the pulp concentration to 30%; based on each ton of tailings, add activator copper sulfate 150g / t, lead nitrate 150g / t and ammonium bicarbonate 150g / t, collector butyl xanthate 60g / t T and butylamine black powder 30g / t, foaming agent No. 2 oil 40g / t, go to flotation roughing I, get flotation roughing I concentrate and flotation roughing I tailings...

Embodiment 3

[0035] The ore sample was taken from the flotation tailings of an antimony-bearing gold mine in Yunnan. The tailings contained 0.6g / t gold, 14.6g / t silver, 1.6% sulfur, and 0.1% antimony. The flotation tailings on site also used direct cyanidation. Gold and silver are recovered by leaching, but the content of gold in the leaching residue reaches 0.2g / t.

[0036] Take the flotation tailings and classify them with hydrocyclones to obtain +0.038mm coarse-grain products and -0.038mm fine-grain products. The +0.038mm coarse-grain products are ground to make the particle size less than 0.074mm by weight. 90%, then add water to adjust the slurry concentration to 28%; based on each ton of tailings, add 200g / t copper sulfate activator, 200g / t lead nitrate and 100g / t ammonium bicarbonate, and 60g collector butyl xanthate. / t and butylamine black powder 40g / t, foaming agent No. 2 oil 40g / t, proceed to flotation roughing I to obtain flotation roughing I concentrate and flotation roughing I t...

Technical field

[0001] The invention belongs to the field of mineral processing, and relates to a method for recovering gold and fine-grained antimony minerals in the flotation tailings of antimony-containing gold mines, which helps to strengthen the recovery of gold and fine-grained antimony minerals in the tailings, and improves the gold recovery rate. Reduce the cost of tailings leaching. Background technique

[0002] The cyanide gold extraction process has become the most widely used gold extraction process and method due to its low cost, high gold recovery rate, simple process flow and operating conditions. However, as the degree of gold mining resources in my country increases, it is easy to The mineral resources of beneficiation are decreasing year by year. According to statistics, about 60% to 70% of gold resources in the world belong to complex and difficult-to-treat gold mines, but the utilization of this part of gold resources is still low.

[0003] The combined process...

Examples

Embodiment 1

[0027] The flotation tailings of an antimony-containing gold ore in Guizhou were selected. The tailings contained 0.7g / t gold, 1.6% sulfur, 0.29% antimony, 0.92% arsenic, 1.02% carbon, and 5.8% iron; the tailings were directly leached by cyanide on site , But the gold content in the final leaching residue reaches 0.2g / t~0.4g / t, and the gold loss is serious.

[0028] Take the flotation tailings and classify them by hydrocyclone to obtain +0.038mm coarse-grain products and -0.038mm fine-grain products. The +0.038mm coarse-grain products are ground to make the particle size less than 0.074mm. Reach 85%, and then adjust the slurry concentration to 31%; based on each ton of tailings, add 200g / t copper sulfate activator, 200g / t lead nitrate, 100g / t ammonia bicarbonate, and 60g collector butyl xanthate. / t and butylamine black powder 40g / t, foaming agent No. 2 oil 30g / t, after slurry adjustment, flotation rough Ⅰ, flotation rough Ⅰ concentrate and flotation rough Ⅰ tailings are obtained...

Embodiment 2

[0031] The flotation tailings of a complex antimony-containing gold mine in Gansu were selected. The flotation tailings contained 1.2g / t gold, 1.89% sulfur, 0.83% antimony, 0.94% carbon, and 28.4% silica. The treatment process of on-site flotation tailings is direct cyanidation leaching, but the gold content in the leaching residue reaches 0.6g / t~0.8g / t.

[0032] Take the flotation tailings and classify them by hydrocyclones to obtain +0.038mm coarse-grain products and -0.038mm fine-grain products. The +0.038mm coarse-grain products are reground so that the weight percentage of the particle size is less than 0.074mm 88%, and then adjust the pulp concentration to 30%; based on each ton of tailings, add activator copper sulfate 150g / t, lead nitrate 150g / t and ammonium bicarbonate 150g / t, collector butyl xanthate 60g / t T and butylamine black powder 30g / t, foaming agent No. 2 oil 40g / t, go to flotation roughing I, get flotation roughing I concentrate and flotation roughing I tailings...

Embodiment 3

[0035] The ore sample was taken from the flotation tailings of an antimony-bearing gold mine in Yunnan. The tailings contained 0.6g / t gold, 14.6g / t silver, 1.6% sulfur, and 0.1% antimony. The flotation tailings on site also used direct cyanidation. Gold and silver are recovered by leaching, but the content of gold in the leaching residue reaches 0.2g / t.

[0036] Take the flotation tailings and classify them with hydrocyclones to obtain +0.038mm coarse-grain products and -0.038mm fine-grain products. The +0.038mm coarse-grain products are ground to make the particle size less than 0.074mm by weight. 90%, then add water to adjust the slurry concentration to 28%; based on each ton of tailings, add 200g / t copper sulfate activator, 200g / t lead nitrate and 100g / t ammonium bicarbonate, and 60g collector butyl xanthate. / t and butylamine black powder 40g / t, foaming agent No. 2 oil 40g / t, proceed to flotation roughing I to obtain flotation roughing I concentrate and flotation roughing I t...

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