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Suspension roasting system for carbon-containing gold ore

The technology of suspension roasting and suspension roasting furnace is applied in the field of suspension roasting system of carbon-containing gold ore, which can solve the problems of high cost, low efficiency and uneven product quality.

Active Publication Date: 2020-08-07
SHANGHAI MILESTONE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a carbon-containing gold ore suspension roasting system for the problems of high cost, low efficiency, uneven product quality and other problems existing in the existing carbon-containing gold ore decarbonization and desulfurization technology

Method used

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  • Suspension roasting system for carbon-containing gold ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] The structure of carbon-bearing gold ore suspension roasting system is as follows: figure 1 As shown, it includes feeding bin 2, Venturi dryer 5, first cyclone preheater 6, second cyclone preheater 7, pre-oxidation suspension roaster 8, heat separation cyclone 10, strong oxidation suspension roaster 12 , collection bin 18, grinding machine 20, collection tank 21, leaching tank 23, dust collector 27 and induced draft fan 32;

[0075] A feeding belt 1 is provided above the feeding bin 2 for transferring materials to the feeding bin 2;

[0076] A loss-in-weight feeder 3 is provided between the feed bin 2 and the screw feeder 4, and the loss-in-weight feeder 3 is opposite to the outlet of the feed bin 2 and the feeding end of the screw feeder 4 respectively;

[0077]The screw feeder 4 is opposite to the inlet of the Venturi dryer 5; the outlet of the Venturi dryer 5 communicates with the inlet of the first cyclone preheater 6, and the outlet of the first cyclone preheater ...

Embodiment 2

[0101] System structure is the same as embodiment 1;

[0102] The carbon-containing gold ore Au content 16.93g / t that adopts, the mass percentage of C 5.82%, the mass percentage of As 0.35%, the mass percentage of S 7.35%, method is the same as embodiment 1, and difference is:

[0103] (1) Grinding to a particle size of -0.074mm accounts for 85% of the total mass to obtain fine ore;

[0104] (2) controlling the temperature of the material at the outlet of Venturi drier 5 is 140°C;

[0105] (3) The solid material is preheated to 400°C in the second cyclone preheater 7;

[0106] (4) The dearsenic roasting temperature is 680°C, and the residence time of fine ore in the pre-oxidation roaster is 18 minutes;

[0107] (5) The strong oxidation roasting temperature is 570°C, and the amount of oxygen introduced is O 2 1.2 times the amount required for the complete reaction of C and S in the pre-oxidized calcined powder; the volume concentration of oxygen in the strong oxidation suspe...

Embodiment 3

[0112] System structure is the same as embodiment 1;

[0113] The carbon-containing gold ore Au content 24.17g / t that adopts, the mass percent of C 17.56%, the mass percent of As 0.14%, the mass percent of S 8.21%, method is the same as embodiment 1, difference is:

[0114] (1) Grinding to a particle size of -0.074mm accounts for 90% of the total mass to obtain fine ore;

[0115] (2) controlling the temperature of the material at the outlet of Venturi drier 5 is 150°C;

[0116] (3) The solid material is preheated to 450°C in the second cyclone preheater 7;

[0117] (4) The dearsenic roasting temperature is 700°C, and the residence time of fine ore in the pre-oxidation roaster is 15min;

[0118] (5) The strong oxidation roasting temperature is 600°C, and the amount of oxygen introduced is O 2 1.3 times the amount required for the complete reaction of C and S in the pre-oxidized roasted powder; the volume concentration of oxygen in the strong oxidation suspension roaster is 2...

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Abstract

The invention provides a suspension roasting system for carbon-containing gold ore. A feeding bin is opposite to a screw feeder, and the screw feeder is opposite to a venturi dryer; the venturi dryer,a first cyclone preheater, a second cyclone preheater and a pre-oxidation suspension roaster are connected in series, the upper part of the pre-oxidation suspension roaster is connected with the thermal separation cyclone through a pipeline, the thermal separation cyclone, a first flow sealing valve and a strong oxidation suspension roaster are connected in series, and the strong oxidation suspension roaster communicates with an oxygen gas source and a nitrogen gas source; a discharging outlet of the strong oxidation suspension roaster, a second flow sealing valve, a first cooling cyclone, asecond cooling cyclone, a third cooling cyclone and a collection bin are connected in series; and a collection bin, an ore grinding machine, a collection tank, a first slurry pump, a leaching tank, asecond slurry pump and a filter press are matched in sequence. The suspension roasting system for the carbon-containing gold ore has the advantages of high heat and mass transfer efficiency, completeremoval of carbon materials, sulfur and arsenic, high efficiency high adaptability to different ores, easy realization of large-scale industrial production and the like.

Description

technical field [0001] The invention belongs to the technical field of beneficiation, in particular to a carbon-containing gold ore suspension roasting system. Background technique [0002] At present, with the dwindling resources of easy-to-handle gold mines, more and more attention has been paid to the development and utilization of hard-to-handle gold mines. Carbon-containing gold ore is one of the difficult-to-treat gold ores. During the cyanidation leaching process, when the carbon content in the primary gold ore exceeds 0.2%, the carbon material will react with the gold-cyanide complex, and the phenomenon of "robbing gold" will appear. , leading to a sharp decrease in the leaching rate of gold; the cyanide gold extraction method has become the first choice for gold smelting enterprises to produce gold due to its characteristics of less cyanide consumption, high leaching rate and strong adaptability to ore. According to statistics, 75% of the world's Gold is produced b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/02C22B3/04C22B11/08
CPCC22B1/02C22B3/06C22B11/04C22B11/08Y02P10/20
Inventor 李艳军韩跃新肖汉新袁帅高鹏孙永升
Owner SHANGHAI MILESTONE TECH CO LTD
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