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Treatment method of roasting arsenium-containing gold ore concentrate

A treatment method and technology of gold concentrate, which is applied in the field of roasting pre-oxidation treatment of arsenic-containing gold concentrate, can solve the problems of high gold grade in cyanide tailings, incomplete smoke and dust roasting, high smoke and dust rate, etc., and achieve improved leaching recovery The effect of improving the efficiency, ensuring the roasting quality and improving the recovery rate

Inactive Publication Date: 2011-09-14
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to address the shortcomings of the above-mentioned prior art, and to provide a method that can effectively solve the problem of incomplete soot roasting and high soot rate in the two-stage roasting process of arsenic-containing refractory gold concentrate and high grade gold in cyanide tailings. Problem, the roasting treatment method of arsenic-containing gold concentrate to improve the gold recovery rate in arsenic-containing refractory gold concentrate

Method used

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  • Treatment method of roasting arsenium-containing gold ore concentrate
  • Treatment method of roasting arsenium-containing gold ore concentrate
  • Treatment method of roasting arsenium-containing gold ore concentrate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The main chemical components of the arsenic-containing gold concentrate are listed in Table 1.

[0017] Table 1 Embodiment 1—Chemical element composition (%) of arsenic-containing gold concentrate

[0018]

[0019] *Note: The units of Au and Ag are g / t.

[0020] Spray arsenic-containing gold concentrate with a slurry concentration of 68% into the first-stage roaster, blow 85% of theoretical air into the first-stage roaster, and control the roasting temperature to 550°C. The dust-collected calcined sand and the calcined sand from the overflow port of the first-stage furnace are discharged into the second-stage furnace. The flue gas after dust collection in the first stage furnace cyclone is cooled to 380°C and then enters the electric precipitator for dust collection. After dust collection, the flue gas is collected for arsenic collection, and the flue gas is sent to the acid purification system after collection.

[0021] The first-stage furnace cyclone dust-collect...

Embodiment 2

[0027] The main chemical components of the arsenic-containing gold concentrate are listed in Table 2.

[0028] Table 2 Embodiment 2—Chemical element composition (%) of arsenic-containing gold concentrate

[0029]

[0030] *Note: The units of Au and Ag are g / t.

[0031] Spray the arsenic-containing gold concentrate with 70% slurry concentration into the first-stage roaster, blow 90% of the theoretical amount of air into the first-stage roaster, control the roasting temperature at 580°C, and collect the generated flue gas through the cyclone. The dust-collected calcined sand and the calcined sand from the overflow port of the first-stage furnace are discharged into the second-stage furnace. The flue gas after dust collection by the cyclone of the first stage furnace is cooled to 345°C and then enters the electric dust collector for dust collection. After dust collection, the flue gas is collected for arsenic, and the flue gas is sent to the acid purification system after col...

Embodiment 3

[0038] The main chemical components of the arsenic-containing gold concentrate are listed in Table 3.

[0039] Table 3 Embodiment 3—chemical element composition (%) of arsenic-containing gold concentrate

[0040]

[0041] *Note: The units of Au and Ag are g / t.

[0042] Spray arsenic-containing gold concentrate with a slurry concentration of 69% into the first-stage roasting furnace, blow 88% of theoretical air into the first-stage roaster, control the roasting temperature at 550°C, and collect the generated flue gas by cyclone. The dust-collected calcined sand and the calcined sand from the overflow port of the first-stage furnace are discharged into the second-stage furnace. The flue gas after dust collection by the cyclone of the first stage furnace is cooled to 320°C and then enters the electric dust collector for dust collection. After dust collection, the flue gas is collected for arsenic collection, and the flue gas is sent to the acid purification system after colle...

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Abstract

The invention provides a treatment method of roasting arsenium-containing gold ore concentrate, which relates to gold concentration in a technological process of smelting and extracting gold from gold ore, particularly a treatment method of carrying out pre-oxidizing roasting on arsenium-containing gold ore concentrate. The roasting process adopts a two-stage circulating dust-returning roasting technological process. The method is characterized in that first-stage roasting furnace fume and second-stage roasting furnace fume are respectively and independently subjected to dust collection, and the collected smoke dust is pneumatically delivered back to the second-stage roasting furnace for roasting, and part of the smoke dust is discharged into a water quenching tank to be subjected to water quenching, and is cyanated for gold extraction, wherein the smoke dust, which is pneumatically delivered back for re-roasting, accounts for 90-50% of all the collected smoke dust. The method provided by the invention effectively solves the technical problems of high grade of gold in leaching slag and low recovery rate of gold in the technique for extracting arsenium-containing unmanageable gold ore concentrate, so that the leaching rate of gold in the arsenium-containing gold ore concentrate is increased by 5% or so, and slag gold is reduced from above 4g / t to below 2.5g / t. The invention is widely applicable to the field of gold extraction by roasting and smelting gold ore concentrate.

Description

technical field [0001] The invention relates to a roasting treatment method of arsenic-containing gold concentrate, which relates to a gold concentrate in the process of gold smelting and gold extraction, especially a method for roasting and pre-oxidizing treatment of arsenic-containing gold concentrate. Background technique [0002] At present, the oxidation pretreatment methods before gold extraction of gold concentrate mainly include roasting oxidation, pressurized oxidation and bacterial oxidation. As a traditional process, roasting oxidation is still the most attractive treatment method in the gold concentrate pretreatment process because of its mature process, strong adaptability, simple operation and reliable technology, and relatively low investment cost. [0003] In recent years, the two-stage roasting pretreatment technology for arsenic-containing refractory gold concentrate developed on the basis of boiling oxidation roasting of gold concentrate has been rapidly d...

Claims

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Application Information

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IPC IPC(8): C22B1/02C22B11/08
Inventor 王云袁朝新李云郭持皓常耀超孙留根黄海辉梅玉伟何国华
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY
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