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Method of extracting gold tail slag from arsenic containing aurin ore then extracting gold and silver

A gold concentrate, gold and silver technology, applied in the field of gold and silver extraction of precious metal smelting, can solve the problems of waste, gold and silver not being recycled, and achieve the effect of improving the gold and silver recovery rate

Inactive Publication Date: 2007-01-31
SHANDONG GUODA GOLD
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Problems solved by technology

Thereby the gold and silver in the cyanidation tailings cannot be recycled, causing certain waste

Method used

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Embodiment approach

[0012] The method of extracting gold and silver from arsenic-containing gold concentrate by extracting gold tailings is implemented in a two-stage boiling roasting system with an annual processing capacity of 150 tons of arsenic-containing gold concentrate. The raw ore composition is about Au50g / t, Ag135g / t, S> 20%, As3.5% arsenic-containing gold concentrate, carry out two-stage boiling roasting, control the temperature of the reduction furnace at 550°C, and the excess air coefficient of 0.8; control the temperature of the oxidation roaster at 620°C, and the excess air coefficient of 1.2; adjust the acid leaching pH = 1~2, after solid-liquid separation, water washing and other processes, the slag is cyanided to extract gold and silver, the concentration of sodium cyanide is 8-10 / 10,000; the removal rates of carbon, arsenic and sulfur can reach 97%, 88% respectively % and more than 86%, the recovery rate of gold and silver reaches 90% and more than 73% respectively.

[0013] Th...

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Abstract

The present invention relates to a method for extracting gold tailings from arsenical glod headings and further extracting gold and silver. Said extraction method includes the following steps: 1), enriching cyanogens dregs which are obtained after the arsenical gold headings are smelted by cyanidation process and whose gold and silver are recovered, pressing the cyanogens dregs into brick block; and 2), adding the cyanogens dregs enriched brick block into a copper smelting furnace and further recovering noble metals of gold and silver and copper.

Description

1. Technical field [0001] The invention relates to a method for extracting gold and silver from refractory gold concentrates, and belongs to the technical field of gold and silver extraction methods for precious metal smelting. 2. Background technology [0002] At present, in the field of gold smelting, after arsenic-containing refractory gold concentrate is pretreated to remove arsenic, and cyanide technology is used to smelt and recover gold and silver, the content of gold and silver in the cyanide tailings is still 2-4g / t, generally Gold and silver are no longer recovered, and after being dehydrated by a filter press, they are sold as iron-containing raw materials to make cement. Thereby the gold and silver in the cyanidation tailings cannot be recycled, causing certain waste. 3. Contents of the invention [0003] The object of the present invention is to provide a method for extracting gold tailings from arsenic-containing gold concentrate and then extracting gold and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/00C22B7/04
Inventor 徐永祥吕寿明苑兆金刘占林尹瑞学孙浩飞温方炳曹永超路玉国
Owner SHANDONG GUODA GOLD
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