Process for improving arsenic gold concentrate roasting arsenic and sulfur removal rate

A technology for gold concentrate and desulfurization rate, applied in the fields of metallurgy, chemical industry, and gold smelting, can solve the problems of waste of resources, low gold recovery rate, poor arsenic roasting removal effect, etc. , the effect of significant economic benefits

Active Publication Date: 2013-07-24
SHANDONG GUODA GOLD
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AI Technical Summary

Problems solved by technology

At present, in the roasting process for the roasting dearsenic and desulfurization of arsenic-containing gold concentrate, the roasting conditions are mainly controlled. After calcination, gold is usually extracted by cyanide method, and the recovery rate is only about 88%. The roasting removal effect of arsenic is poor, and the gold recovery rate is low, resulting in waste of resources.

Method used

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  • Process for improving arsenic gold concentrate roasting arsenic and sulfur removal rate

Examples

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Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 does not add any arsenic and desulfurization additives

[0018] 1) Blend the arsenic-containing gold concentrate in the slurry mixing tank: according to the detection fineness and analysis content of the incoming arsenic-containing gold concentrate, organize the stockyard blending, shovel it into the silo of the feeding plant, and then the production workshop Organize the slurry so that the slurry contains 25% of the total mass of sulfur and 6% of arsenic, and add water to adjust the concentration of the slurry to 65%;

[0019] 2) Spray the evenly stirred ore slurry in step 1) into the primary roasting furnace with a spray gun, and carry out reduction roasting. The temperature is controlled at 550°C. The discharged roasting flue gas enters the primary cooling dust collector. Enter the secondary roasting furnace for oxidation roasting, the temperature is controlled at 630 ° C, the dusty flue gas discharged from the oxidation roasting enters the secondary coolin...

Embodiment 2

[0022] Example 2 Addition of arsenic and desulfurization additives

[0023] 1) Blend the arsenic-containing gold concentrate in the slurry mixing tank: according to the detection fineness and analysis content of the incoming arsenic-containing gold concentrate, organize the stockyard blending, shovel it into the silo of the feeding plant, and then the production workshop Tissue pulping, so that the pulp contains 25% of sulfur and 6% of arsenic in the total mass of the pulp, add water and 3% of the total mass of the pulp additives (mass ratio 1:1:1:3 ammonium sulfate, ammonium bicarbonate, Ammonium carbonate, sodium persulfate mixture), adjust the slurry concentration to 65%;

[0024] 2) Spray the evenly stirred ore slurry in step 1) into the primary roasting furnace with a spray gun, and carry out reduction roasting. The temperature is controlled at 550°C. The discharged roasting flue gas enters the primary cooling dust collector. Enter the secondary roasting furnace for oxid...

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Abstract

The invention relates to a process for improving an arsenic gold concentrate roasting arsenic and sulfur removal rate. The process comprises the steps of adding 3-8% of an additive to arsenic gold concentrate, and carrying out two-sectional roasting treatment; recovering arsenic trioxide from smoke generated from roasting through a cloth bag arsenic collection device, and implementing SO2 purification, SO2 drying, SO2 twice conversion and two-stage absorption on the smoke after arsenic removal to generate 98% of a sulfuric acid product; and recovering valuable metallic gold and silver from a roasting product generated from the roasting through an acid leaching process and a cyaniding process. The process is simple in process, energy-saving and environment-friendly, and capable of effectively improving the arsenic gold concentrate roasting arsenic and sulfur removal rate; and the process can not only increase the yields of an arsenic trioxide product and an sulfuric acid product, but also remarkably improve the recovery rate of the valuable metallic gold in the arsenic gold concentrate; and the process has a remarkable economic benefit.

Description

technical field [0001] The invention relates to a process for improving the arsenic and desulfurization rate of arsenic-containing gold concentrate roasting, and belongs to the technical fields of gold smelting and metallurgy and chemical industry. Background technique [0002] At present, arsenic-containing gold concentrates are complex gold concentrates that are difficult to treat. The main treatment processes include biological oxidation, pressurized oxidation, roasting, and two-stage roasting. Arsenic is removed to fully expose the gold particles in the mineral, which is conducive to improving the recovery rate of gold in the mineral. At present, in the roasting process for the roasting dearsenic and desulfurization of arsenic-containing gold concentrate, the roasting conditions are mainly controlled. After calcination, gold is usually extracted by cyanidation method, and the recovery rate is only about 88%. The roasting removal effect of arsenic is poor, and the recove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B11/08
Inventor 梁志伟刘金才吕寿明刘占林韩玉石
Owner SHANDONG GUODA GOLD
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