A method for comprehensive recovery of complex high-silver ore

A silver ore and complex technology, applied in the field of comprehensive recovery of complex high-silver ore, can solve the problems of excessively long process flow, reduced direct yield, long recovery time, etc. Effect

Active Publication Date: 2019-05-31
CHENZHOU CITY JINGUI SILVER IND CO LTD
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  • Application Information

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Problems solved by technology

[0002] A company imports a large amount of Bolivian high silver ore, which is the enrichment product of silver concentrate or an intermediate product in the smelting process of some non-ferrous metals. This kind of high silver ore contains gold, silver, zinc, lead, and sulfur. Higher, if the traditional smelting method is adopted, the direct recovery rate of precious metals, especially gold and silver, will be greatly reduced due to the long process flow and long recovery time

Method used

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  • A method for comprehensive recovery of complex high-silver ore
  • A method for comprehensive recovery of complex high-silver ore

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Experimental program
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Embodiment Construction

[0019] The process trend is described in detail below in conjunction with specific process implementation modes.

[0020] A kind of technological process of comprehensively recovering complex high silver ore is as follows:

[0021] 1) Pressure leaching conditions: ball milling to a particle size of 100-300 mesh, liquid-solid ratio of 4-8:1, sulfuric acid concentration of 2-5mol / L, temperature of 140-170°C, speed of 400-800r / min, pressure 0.5-2.0 MPa, reaction time 2-5h;

[0022] 2) Distillation conditions: strictly control the temperature at 200-500°C, and the distillation time is 3-8h;

[0023] 3) Converter reduction smelting conditions: the melting temperature is 1100-1200°C; the precipitation time is 2-6h; the furnace time is 18-22h; the slagging temperature is 1100-1200°C;

[0024] 4) Converter oxidation and refining conditions: fume run-off temperature is 900-950°C; oxidation slagging temperature is 1000-1100°C, and the total time is 40-60h; slagging conditions are: mai...

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Abstract

The invention provides a complex high-silver mine comprehensive recycling method. The method includes the steps that the high-silver mine is subjected to oxygen-pressure acid leaching to enable zinc to enter a solution, gold, silver, lead and the like are enriched in a slag, the solution is deposited with sodium carbonate to form zinc carbonate which can be directly sold, the slag is subjected tolow temperature distillation to enable sulfur to be distilled out to be recycled, and the slag after being distillated is subjected to reduction smelting and oxidizing refining to recycle the gold andthe silver. The complex high-silver mine comprehensive recycling method is suitable for comprehensive recycling the gold, the silver, the zinc, the lead and the other valuable metal from the high-silver mine with high content of the gold, the zinc and the lead, and the direct recycling rate of the gold, the silver, the zinc and the lead are separately more than 98%, 97%, 95% and 96%. The direct recycling rate is high and the separation is complete, and precious metal in the smelting system, especially the rapid recycling of the gold and the silver is facilitated.

Description

technical field [0001] The invention relates to a method for comprehensively recovering complex high-silver ores, belonging to the field of secondary resource recovery of nonferrous metals. technical background [0002] A company imports a large amount of Bolivian high silver ore, which is the enrichment product of silver concentrate or an intermediate product in the smelting process of some non-ferrous metals. This kind of high silver ore contains gold, silver, zinc, lead, and sulfur. If the traditional smelting method is used, the direct recovery rate of precious metals, especially gold and silver, will be greatly reduced due to the long process flow and long recovery time. Therefore, the rapid and comprehensive recovery of precious metals, especially gold and silver, in complex high-silver mines is of great significance for the rapid purification of precious metals into products and the reduction of the company's capital backlog. Contents of the invention [0003] The ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/08C22B19/20C22B13/02C22B11/02C01B17/06
CPCC01B17/06C22B3/08C22B11/02C22B13/02C22B19/22Y02P10/20
Inventor 覃小龙粟明辉姜乐李军夏
Owner CHENZHOU CITY JINGUI SILVER IND CO LTD
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