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Method for raising leaching rate of silver cyanide

A technology of cyanidation leaching and leaching rate, which is applied in the field of production and processing technology for silver extraction by roasting cyanide, can solve the problems of no longer recycling of silver, waste of resources, etc., and achieve the effects of improving utilization rate and leaching rate.

Inactive Publication Date: 2013-06-19
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, in the silver ore smelting process, when the roasting cyanide method is used to extract silver and copper from complex silver ores containing copper, arsenic, and carbon, the general recovery rate of silver cyanide is lower than 65%. The current treatment method is: cyanide The tailings are used to produce iron red, cement additives, etc., and the silver in it is no longer recycled, wasting precious resources

Method used

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  • Method for raising leaching rate of silver cyanide
  • Method for raising leaching rate of silver cyanide
  • Method for raising leaching rate of silver cyanide

Examples

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Embodiment 1

[0016] A kind of method for improving silver chloride leaching rate of the present embodiment comprises the following steps:

[0017] 1. Add complex silver ore with a gold content of 11 g / t and a silver content of 960 g / t, sodium sulfate with a concentration of 2%, and sodium carbonate with a concentration of 2% in a mass ratio of 1:0.02:0.02 In the tank, the complex silver ore is powdery, add water to adjust the pulp concentration to 65%, keep stirring continuously for 3 hours at normal temperature and pressure;

[0018] 2. Carry out boiling roasting, specifically: pump the slurry obtained in step 1 to the slurry storage tank, enter the fluidized furnace through a spray gun for boiling roasting, add compressed air through a Roots blower during the process, and control the temperature at 550-600°C for roasting, roasting The time is controlled within 10-30 seconds;

[0019] 3. The calcined sand after roasting is transported to the acid leaching tank by scraper for acid leachin...

Embodiment 2

[0025] The difference between this embodiment and embodiment 1 lies in step 1, specifically:

[0026] Add complex silver ore with gold content of 12 g / t and silver content of 1100 g / t, sodium sulfate with a concentration of 2.5%, and sodium carbonate with a concentration of 2.5% into the slurry mixing tank at a mass ratio of 1:0.02:0.03 , the complex silver ore is powdery, add water to adjust the slurry concentration to 68%, and stir continuously for 4 hours at normal temperature and pressure;

[0027] The assay result and related data of the present embodiment are as shown in table 2

[0028] Table 2: The assay result and relevant data of embodiment 2

[0029]

Embodiment 3

[0031] The difference between this embodiment and embodiment 1 lies in step 1, specifically:

[0032] Add complex silver ore with gold content of 13.5g / t and silver content of 1326 g / t, sodium sulfate with a concentration of 2%, and sodium carbonate with a concentration of 2% into the slurry mixing tank at a mass ratio of 1:0.03:0.02 , the complex silver ore is powdery, add water to adjust the slurry concentration to 70%, and stir continuously for 5 hours at normal temperature and pressure;

[0033] The assay result and related data of the present embodiment are as shown in table 2

[0034] Table 3: The assay result and related data of embodiment 3

[0035]

[0036] The invention is a method for increasing the leaching rate of silver chloride. Because sodium sulfate and sodium carbonate are added in the roasting process, the recovery rate of silver can reach 89.06-90.49%, which improves the utilization rate of resources and the economic benefits of enterprises .

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Abstract

The invention relates to a method for raising leaching rate of silver cyanide and belongs to the technical field of roasting-cyaniding silver extraction production processing technology in the gold smelting and chemical industry. The method provided by the invention contains the following steps of: 1, adding complex silver ore, sal glauberi and sodium carbonate according to the mass ratio of 1: (0.02-0.03): (0.02-0.03) into a surge tank, adjusting the pulp concentration to 65-70% by the addition of water, and continuously stirring at normal temperature and normal pressure for 3-5 hours; 2) carrying out fluidized sulfating roasting on the pulp obtained from the step 1); 3) carrying out acid leaching treatment; and 4) carrying out cyanide leaching. By the adoption of the method, recovery rate of silver can be effectively raised, and utilization rate of resources and enterprise economic benefits are raised.

Description

technical field [0001] The invention relates to a method for increasing the leaching rate of silver cyanide, which belongs to the technical field of production and processing technology of roasting cyanide to extract silver in gold smelting and chemical industry. Background technique [0002] At present, in the silver ore smelting process, when the roasting cyanide method is used to extract silver and copper from complex silver ores containing copper, arsenic, and carbon, the general recovery rate of silver cyanide is lower than 65%. The current treatment method is: cyanide The chemical tailings are used to produce iron red, cement additives, etc., and the silver in it is no longer recycled, wasting precious resources. Contents of the invention [0003] The object of the present invention is to solve the weak point that above-mentioned prior art exists, provide a kind of method that can effectively improve silver recovery rate, improve resource utilization rate and enterp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B11/08
CPCY02P10/20
Inventor 徐永祥吕寿明刘占林林清岩
Owner SHANDONG GUODA GOLD
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