Method suitable for independent smelting of various types of complex gold concentrate

A gold concentrate and complex technology, which is applied in the field of independent smelting of various types of complex gold concentrates, can solve the problems of increased smelting costs, unsuitable treatment of gold concentrates, and inability to realize separate treatment of gold concentrates, so as to reduce smoke and dust production High yield, easy industrialization, and efficient comprehensive recycling

Inactive Publication Date: 2020-02-11
蒋开喜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method must be processed together, and gold concentrate cannot be processed separately, and it is not suitable for processing a large amount of gold concentrate with low copper content. In addition, the long-distance transportation of materials will also increase the cost of smelting

Method used

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  • Method suitable for independent smelting of various types of complex gold concentrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The main components of gold concentrate are Au 18.32g / t, Ag 70g / t, Cu 3.72%, S 26%, Fe 22%, adding quartz, limestone, coke powder, etc. The material ratio is: gold concentrate:quartz:limestone : coke powder = 100:1:1:4.5, sent to the smelting furnace for smelting, controlled reaction temperature 1200~1350°C, oxygen concentration 70%, output flue gas SO 2 The concentration is 17%, and it is sent to the acid system after dust collection, and the dust rate is about 1.5%. The grades of gold and silver in matte reached 149.6g / t and 554.17g / t respectively, the grade of iron was 30.6%, and the grade of copper was 29.45%. Put the matte into a 9% quartz converter for oxygen-enriched blowing, and control the reaction temperature at 1300-1350°C. The grades of gold and silver in the produced gold and silver enrichment II reach 4895.68g / t and 18133.57g / t respectively. The enrichment is electrolyzed to recover copper, gold and silver enter into anode slime, and produce gold and silv...

Embodiment 2

[0028] The main components of gold-bearing smelting slag are Au 15.65g / t, Ag 1.5g / t, S 3.2%, Fe 5%, adding pyrite, quartz, coal powder for oxygen-enriched smelting, gold-bearing smelting slag, pyrite, The quartz ratio is 100:50:10, the reaction temperature is controlled at about 1350°C, the oxygen concentration is 75%, and the flue gas SO is produced 2 The concentration is 12%, and it is sent to the acid system after dust collection, and the dust rate is about 1.5%. The grades of gold and silver in matte reached 125.20g / t and 7.50g / t respectively, and the grade of iron was 56.3%. The gold-silver-rich matte is finely ground and leached with oxygen-enriched sulfuric acid, iron and sulfur are leached into the solution, gold and silver are enriched in the slag, and gold and silver can be directly extracted by hydrometallurgy. The gold recovery rate is greater than 97.5%, and the silver recovery rate is greater than 60%.

Embodiment 3

[0030]The main components of gold concentrate produced by beneficiation are Au 41g / t, Ag 28g / t, S 21.42%, Fe 23%, SiO 2 20%, add 5% pyrite and 5% coal powder, carry out oxygen-enriched smelting, control the reaction temperature at about 1350°C, the gold and silver grades in the matte reach 1010.5g / t and 594.8g / t respectively, and the Fe grade 60.2%, gold and silver can be directly recovered by hydrometallurgical extraction.

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Abstract

The invention relates to a method suitable for independent smelting of various types of complex gold concentrate, and belongs to the technical field of gold smelting. The method comprises the following steps that (1) gold concentrate raw materials are matched with flux for smelting, so that the gold and silver are enriched in matte, the matte is oxidized into smelting flue gas, the gold and silverconcentrate I, smelting slag and smelting flue gas are obtained; (2) the gold and silver concentrate I is recovered through the wet process to obtain gold products, silver products and leached slag;and (3) sulfuric acid is produced from smelting flue gas after waste heat utilization and dust collection, when the copper content of the gold and silver concentrate I is high, the gold and silver concentrate I is subjected to blow secondary enrichment of gold and silver to obtain a gold and silver concentrate II, and then the gold and silver concentrate II can enter the step (2) for wet process recovery treatment. The method suitable for independent smelting of various types of the complex gold concentrate can process various types of complex gold ores, the complex gold concentrate and secondary materials, the process technology and equipment are mature, industrial application is easy to realize, the smoke and dust rate is effectively reduced, cyanide slag or cyanide containing waste water do not be produced, and the economic and social benefits are remarkable.

Description

technical field [0001] The invention belongs to the technical field of gold smelting and relates to a method suitable for independent smelting of various complex gold concentrates. Background technique [0002] Because complex gold concentrates contain carbon, arsenic, antimony, lead and other impurities or are wrapped by minerals, it is difficult to extract them by direct cyanide leaching. The main types of complex gold concentrates are: arsenic-containing fine-grained gold-like concentrates, organic Carbon-based gold concentrate, copper-containing gold concentrate (medium-low copper), lead-containing silver-type complex gold concentrate, silicate-containing complex gold concentrate, fluorine-containing and chlorine-containing gold concentrate, coarse particle weight Gold concentrate. More than 2 / 3 of the world's gold reserves are refractory ores, and the development of complex gold concentrate smelting processes is of great significance. At present, the smelting methods ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B11/02C22B11/00C01B17/74
CPCC01B17/74C22B11/02C22B11/04Y02P10/20Y02P20/129
Inventor 蒋开喜
Owner 蒋开喜
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