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Flotation method of sulphide gold containing ores

A technology for sulfide ores, applied in flotation, solid separation, etc., can solve the problems of long flotation time, low gold recovery rate, large collector consumption, etc. The effect of low dosage

Active Publication Date: 2017-03-22
GUANGXI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The flotation workers have problems such as high collector consumption, long flotation time and low gold recovery rate.

Method used

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  • Flotation method of sulphide gold containing ores

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The main recoverable element in the ore of a gold mine in Liaoning is gold, the grade of raw gold is 1.8g / t, and the main sulfide minerals are pyrite and arsenopyrite. It adopts one roughing, one sweeping, one concentrate, concentrated tailings and sweeping concentrate to return to the grinding process for flotation, and the grinding fineness is -0.074mm, which accounts for 93%. Sodium carbonate 1000g / t, collector: butylammonium black drug 40g / t, O-isopropyl-N-ethylthiocarbamate 40g / t, roughing concentration 33%, foaming agent No. 11 oil The dosage is 25g / t, stirred for 0.8min, and the flotation time is 3.5min. Add 300g / t of sodium carbonate to the sweeping operation, stir for 3min, add 30g / t of O-isopropyl-N-ethylthiocarbamate and The foaming agent No. 11 oil is 10g / t, the stirring and flotation time are both 3min, and the selection flotation time is 2min, and the gold content grade of the concentrate is 28g / t and the gold recovery rate is 93%. The flotation test was ...

Embodiment 2

[0020] The main recoverable element in the ore of a gold mine in Henan is gold, the grade of raw gold is 1.5g / t, and the main sulfide minerals are pyrite and pyrrhotite. It adopts one roughing, one sweeping, one concentrate, concentrated tailings and sweeping concentrate to return to the grinding process for flotation. When the grinding fineness is -0.074mm, it accounts for 90%. Sodium carbonate 1100g / t, collector: butylammonium black drug 45g / t, O-isopropyl-N-ethylthiocarbamate 50g / t, roughing concentration 33%, foaming agent No. 11 oil Dosage is 30g / t, stirring for 0.5-1min, flotation time is 3-4min, adding 350g / t of sodium carbonate for sweeping operation, stirring for 3min, adding O-isopropyl-N-ethylthiocarbamate 35g / t and foaming agent No. 11 oil 10g / t, the stirring and flotation time are both 3min, and the selection flotation time is 2min, the test index of gold content of 42g / t and gold recovery rate of 90% is obtained. . The flotation test was carried out according ...

Embodiment 3

[0022] The main recoverable element in the ore of a gold mine in Hebei is gold, the grade of raw gold is 2.0g / t, and the main sulfide minerals are chalcopyrite and pyrite. It adopts one roughing, one sweeping, one concentrate, concentrated tailings and sweeping concentrate to return to the grinding process for flotation. The grinding fineness is -0.074mm, which accounts for 95%. Sodium carbonate 1200g / t, collector: butyl ammonium black drug 50g / t, O-isopropyl-N-ethylthiocarbamate 50g / t, roughing concentration 33%, foaming agent No. 11 oil The dosage is 30g / t, stirring for 0.5-1min, flotation time is 3-4min, adding 400g / t of sodium carbonate for sweeping operation, stirring for 3min, adding O-isopropyl-N-ethylthiocarbamate 35g / t and foaming agent No. 11 oil 15g / t, the stirring and flotation time are both 3min, and the selection flotation time is 2min, the gold content grade of the concentrate is 38g / t and the gold recovery rate is 94%. . The flotation test was carried out ac...

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Abstract

The invention relates to a flotation method of sulphide gold containing ores. The flotation method comprises the following step: adding 1,000 to 1,200 g / t of sodium carbonate, 40 to 50 g / t of ammonium butyl aerofloat, 40 to 50 g / t of O-isopropyl-N-sulfur ethyl carbamate and the sulphide gold containing ores to be subjected to grinding and floating treatment into a ball grinding machine together for fine grinding until the particle size is -0.074 mm, wherein the particle size accounts for 90 to 95 percent by weight; and the ammonium butyl aerofloat is a collecting agent. The flotation method has the advantages that the process is simple and feasible; the use amount of the collecting agent is small, and the stirring and flotation time is short; and the resource utilization rate can be increased, and the mineral separation cost can be obviously reduced. On the premise that the closed-loop concentrate level is increased or not changed, the recycling rate of gold in the concentrates can be increased by 5 to 8 percent; the use amount of the collecting agent is reduced by 20 to 30 percent; and the stirring time is shortened by 40 to 50 percent.

Description

technical field [0001] The invention belongs to the field of mineral processing, in particular to a method for flotation of sulfide ores containing gold such as pyrite and arsenopyrite. Background technique [0002] Gold-bearing ore is an important mineral resource and plays an important role in the national economy. Commonly used gold-bearing minerals mainly include natural gold, gold-silver ore and silver-gold ore. The average content of gold in the earth's crust is about 1.1 parts per 100 million, and the grade of gold in gold mines with general industrial value is 2-3 grams per ton. Gold has sulfur-philicity and siderophilicity in the crust, and is often closely associated with sulfides such as pyrite, arsenopyrite, and galena. The essence of the flotation of sulfide ores containing gold such as pyrite and arsenopyrite is to flotation the sulfide in the ore. Yu is a gold-carrying group mineral. Generally, the commonly used flotation method in on-site production and l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03D1/00B03D103/02
CPCB03D1/00B03D2203/025
Inventor 孙文瀚代淑娟马芳源冯定五胡志刚
Owner GUANGXI UNIV
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