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A method for ultrasonically enhanced leaching of refractory gold ore and an ultrasonically enhanced gold leaching stirrer

A technology of ultrasonic strengthening and gold mining, applied in the field of hydrometallurgy, can solve problems such as further improvement, difficulty, and difficulty, and achieve the effects of convenient operation, energy saving, and investment reduction

Inactive Publication Date: 2016-05-11
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is more difficult to continue to develop on this basis
The rate of leaching gold seems to have reached a certain limit, and it is difficult to further increase substantially

Method used

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  • A method for ultrasonically enhanced leaching of refractory gold ore and an ultrasonically enhanced gold leaching stirrer
  • A method for ultrasonically enhanced leaching of refractory gold ore and an ultrasonically enhanced gold leaching stirrer

Examples

Experimental program
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Effect test

Embodiment 1

[0022] For a refractory gold ore, the gold grade is 3.23g / t, and the leaching rate obtained by direct conventional cyanidation leaching process is 12.7%. First mix 400g of gold ore powder with a particle size of less than 200 mesh and 600ml of water in a 1L beaker, then add 20g of sodium hydroxide; turn on the mechanical stirring and adjust the stirring speed to 500 rpm, the air volume to 120L / hour, and stir After uniformity, the opening frequency is 20.0kHz, the power is 2kW, and the sound intensity is 3.3W / cm 3 Ultrasonic device carries out ultrasonic intensive pretreatment. The cycle of ultrasonic pretreatment is 5 minutes of ultrasonic pretreatment and stop for 1 minute. During ultrasonic pretreatment, 1ml of hydrogen peroxide is added every half hour; after 3 hours of treatment, filter, wash and dry for later use. Take 150g of ore sample treated with sodium hydroxide, add 600ml of water, 1g of calcium oxide and 1.8g of sodium cyanide, the gas flow rate is 180L / h, the stir...

Embodiment 2

[0028] For a refractory gold ore, the gold grade is 3.23g / t, and the leaching rate obtained by direct conventional cyanidation leaching process is 12.7%. First mix 400g of gold ore powder with a particle size of less than 200 mesh and 600ml of water in a 1L beaker, then add 60g of sodium hydroxide; turn on the mechanical stirring and adjust the stirring speed to 500 rpm, and the air volume to 180L / hour, stir After uniformity, the opening frequency is 20.0kHz, the power is 2kW, and the sound intensity is 3.3W / cm 3 Ultrasonic device for ultrasonic pretreatment. The cycle of ultrasonic pretreatment is 5 minutes of ultrasonic pretreatment and stop for 1 minute. During ultrasonic pretreatment, 1ml of hydrogen peroxide is added every half hour. After 1 hour of treatment, it is filtered, washed and dried for later use; Add 600ml of water, 1g of calcium oxide and 1.8g of sodium cyanide to 150g of the ore sample treated with sodium hydroxide. 3 Ultrasonic equipment is used for ultraso...

Embodiment 3

[0034] For a refractory gold ore, the gold grade is 3.23g / t, and the leaching rate obtained by direct conventional cyanidation leaching process is 12.7%. First mix 400g of gold ore powder with a particle size of less than 200 mesh and 600ml of water in a 1L beaker, then add 60g of sodium hydroxide; turn on the mechanical stirring and adjust the stirring speed to 500 rpm. The air flow rate is 180L / hour, and after stirring evenly, the opening frequency is 20.0kHz, the power is 2kW, and the sound intensity is 3.3W / cm 3 Ultrasonic device for ultrasonic pretreatment. The cycle of ultrasonic pretreatment is 5 minutes of ultrasonic pretreatment and stop for 1 minute. During ultrasonic pretreatment, 1ml of hydrogen peroxide is added every half hour. After 1 hour of treatment, it is filtered, washed and dried for later use; Add 600ml of water, 1g of calcium oxide and 2.7g of sodium cyanide to 150g of the ore sample treated with sodium hydroxide. 3 Ultrasonic equipment is used for ultr...

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Abstract

Belonging to the technical field of wet metallurgy, the invention relates to an ultrasonic intensified leaching method for refractory gold ores and an ultrasonic intensified gold leaching stirrer. The method includes: firstly crushing gold ores to prepare an ore pulp, and then subjecting the ore pulp to pretreatment and leaching processes, in which ultrasonic intensified treatment is adopted. The ultrasonic intensified gold leaching stirrer includes a trough body, a feed inlet, a discharge port, a stirring structure, an ultrasonic structure and a ventilation structure. In the pretreatment and leaching processes, the method employs the ultrasonic method to perform intensified treatment on refractory gold ores, especially by adopting the ultrasonic method in the pretreatment process, the reaction time is shortened, and the leaching effect is intensified. The transmission shaft and stirring impellers of the ultrasonic intensified gold leaching stirrer deviate from the trough body center, thus effectively preventing the swirling phenomena, being beneficial to uniform mixing of solid-liquid-gas phase, and increasing the mass transfer rate.

Description

technical field [0001] The invention relates to a method for ultrasonically intensified leaching of refractory gold ore and an ultrasonically intensified gold leaching stirrer, belonging to the technical field of hydrometallurgy. Background technique [0002] Due to its excellent performance, gold has also been widely used in modern high-tech industries, such as electronics, communications, aerospace, chemical, medical and other technical fields. With the continuous increase in the mining of gold mineral resources, the reserves of high-grade and easy-to-treat gold mines are increasingly depleted, and refractory gold mines will become an important resource for the gold industry in the future. How to effectively and sustainably develop and utilize refractory gold mines is a technical problem that my country's gold industry urgently needs to solve. [0003] Among the proven gold geological reserves in my country, about 1,000 tons belong to the pyrite / arsenopyrite-wrapped refra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/02C22B3/12C22B11/08
CPCY02P10/20
Inventor 王仕兴张利波彭金辉崔维
Owner KUNMING UNIV OF SCI & TECH
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