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Supersonic pre-treatment process of refractory gold ore containing As.S. etc.

An ultrasonic pretreatment and difficult-to-treat technology, which is applied in the direction of improving process efficiency, can solve the problems of demanding materials and manufacturing requirements, high cost, and demanding requirements, and achieve simple equipment and process conditions, short processing time, and easy implementation Effect

Inactive Publication Date: 2005-03-23
严卓理 +2
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Problems solved by technology

The roasting method consumes a lot of energy and brings harmful pollution to the atmosphere; the pressurized oxidation method has strict requirements on the material and manufacture of the reaction vessel, has safety problems, and is also expensive; cultivation work; the conventional method has relatively strict requirements on the material of the reaction chamber due to the use of strong alkali

Method used

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Examples

Experimental program
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Embodiment 1

[0024] The composition of the gold ore to be processed contains:

[0025] 1. Gold; 2. Oxide or salt of arsenic; 3. Sulfide; 4. Other impure components.

[0026] This example proceeds in two stages:

[0027] Ultrasonic initial treatment stage:

[0028] (1) The processing equipment adopts a multi-faceted cylindrical horizontal focused ultrasonic processor, each surface of which is equipped with multiple ultrasonic functional heads, and each ultrasonic functional head is connected to an ultrasonic generator with adjustable frequency. A stirring device that can stir the internal materials and a constant temperature device that can keep the internal materials at a certain temperature;

[0029] (2) Put the gold ore to be processed into the above-mentioned processor, and put it into the immersion liquid, which is an alkaline aqueous solution with a pH value of 8 to 12.5;

[0030] (3) Start the ultrasonic generator, adjust the combination of ultrasonic frequency between 40-55kHz (t...

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Abstract

A technological process of the present invention includes: soaking the gold ore to be treated in alkali water aqua in a reaction container; setting the container in a focusing type supersonic function tank; regulating the focusing supersonic head to frequency 40-55 kHz and irradiation period 40-90 min; changing the alkali soaking liquid into alkali oxidizing soaking liquid; and regulating the focusing supersonic head to frequency 55-70 kHz and irradiation period 100 min. The present invention has the obvious advantages of easy separation of As, S and other components in supersonic cavitation effect, short treatment period, low cost, etc.

Description

technical field [0001] The invention relates to a method for refining precious metals, in particular to a pretreatment method for extracting gold from refractory gold ores containing arsenic and sulfur. Background technique [0002] As the collection of gold mines tends to go deeper, the content of toxic components such as sulfur and arsenic in the ore source will increase, and toxic impurities such as sulfur and arsenic will play a role in the traditional process of extracting gold by infiltration and cyanidation. To a great barrier effect, so that cyanide gold extraction rate is greatly reduced, and even lead to failure. Therefore, it is key to remove toxic components such as sulfur and arsenic in gold sand and tailings through pretreatment. For gold sand and tailings that contain relatively large amounts of toxic components such as arsenic and sulfur, cyanide is used to extract gold components. In terms of supporting pretreatment, the existing technologies mainly contain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/12
CPCY02P10/20
Inventor 严卓晟严锦璇
Owner 严卓理
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