Suspension magnetizing roasting cyanide breakage-weak magnetic separation iron extraction device for high-iron cyanide tailings

A technology of cyanidation tailings and magnetization roasting, applied in magnetic separation, chemical instruments and methods, solid separation, etc., can solve the problems of large sewage production, long process and low efficiency

Active Publication Date: 2020-07-28
上海逢石科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the technical problems existing in the existing high-ferricyanide tailings slag extraction iron and cyanide breaking technology such as long process, low efficiency, larg

Method used

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  • Suspension magnetizing roasting cyanide breakage-weak magnetic separation iron extraction device for high-iron cyanide tailings
  • Suspension magnetizing roasting cyanide breakage-weak magnetic separation iron extraction device for high-iron cyanide tailings

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Experimental program
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Effect test

Embodiment 1

[0073] Suspension magnetization roasting of high ferricyanide tailings cyanide breaking-weak magnetic separation and iron extraction device structure is as follows figure 1 As shown, it includes a feeding bin 2, a Venturi dryer 5, a first cyclone preheater 6, a second cyclone preheater 7, a pre-oxidation suspension roaster 8, a heat separation cyclone 10, a suspension reduction roaster 12, Collection bin 18, first stage grinding machine 20, first stage weak magnetic separator 21, second stage grinding machine 22, second stage weak magnetic separator 23, dust collector 26 and induced draft fan 30;

[0074]The outlet of the feeding bin 2 is opposite to the screw feeder 4, and the feed port of the screw feeder 4 is opposite to the inlet of the Venturi dryer 5; Feed port is communicated, and the discharge port of the first cyclone preheater 6 is communicated with the feed port of the second cyclone preheater 7, and the discharge port of the second cyclone preheater 7 is connected ...

Embodiment 2

[0104] Device structure is the same as embodiment 1;

[0105] The high ferricyanide tailings adopted are TFe 32.91% by mass percentage, SiO 2 29.45%, CN - Content 460mg / L, method is with embodiment 1, difference is:

[0106] (1) The part of ferricyanide tailings that is crushed and ground to a particle size of -0.038mm accounts for 70% of the total mass;

[0107](2) the temperature of the material at the outlet of the venturi drier 5 is controlled to be 130°C; the solid material is preheated to 400°C in the second cyclone preheater 7;

[0108] (3) cyanide breaking roasting temperature 700; The residence time of the solid material entering the pre-oxidation roaster in the pre-oxidation roaster is 10min;

[0109] (4) The reduction roasting temperature is 550°C; when coal gas and nitrogen are introduced from the bottom of the suspension reduction roaster 12, the amount of coal gas introduced is determined according to the amount of H in the coal gas. 2 / CO and Fe in oxide sla...

Embodiment 3

[0113] Device structure is the same as embodiment 1;

[0114] The high ferricyanide tailings adopted are TFe 36.39% by mass percentage, SiO 2 22.25%, CN - Content 420mg / L, method is with embodiment 1, difference is:

[0115] (1) The part of ferricyanide tailings that is crushed and ground to a particle size of -0.038mm accounts for 75% of the total mass;

[0116] (2) the temperature of the material at the outlet of the venturi drier 5 is controlled to be 135°C; the solid material is preheated to 500°C in the second cyclone preheater 7;

[0117] (3) cyanide breaking roasting temperature 750; The residence time of the solid material entering the pre-oxidation roaster in the pre-oxidation roaster is 5min;

[0118] (4) The reduction roasting temperature is 600°C; when feeding coal gas and nitrogen from the bottom of the suspension reduction roasting furnace 12, the amount of coal gas is calculated according to the amount of H in the coal gas. 2 / CO and Fe in oxide slag powder ...

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Abstract

The invention discloses a suspension magnetizing roasting cyanide breakage-weak magnetic separation iron extraction device for high-iron cyanide tailings. A venturi dryer, two cyclone preheaters and apre-oxidation suspension roasting furnace communicate with one another in series. The pre-oxidation suspension roasting furnace comprises a combustor and air inlets. The upper portion of the pre-oxidation suspension roasting furnace communicates with a heat separation cyclone barrel through a pipeline, the heat separation cyclone barrel, a first flow sealing valve and a suspension reducing roasting furnace communicate with one another in series, and the suspension reducing roasting furnace communicates with a coal gas source and a nitrogen source. A discharging outlet of the suspension reducing roasting furnace, a second flow sealing valve, a first cooling cyclone barrel, a second cooling cyclone barrel, a third cooling cyclone barrel and a collecting bin communicate with one another in series. An outlet of the collecting bin cooperates with an inlet of a first-stage ore grinding machine, and the first-stage ore grinding machine, a first-stage weak magnetic separation machine, a second-stage ore grinding machine and a second-stage weak magnetic separation machine cooperate with each other in sequence. An air outlet of the first cyclone preheater communicates with a dust collectorand an induced draft fan in series. The suspension magnetizing roasting cyanide breakage-weak magnetic separation iron extraction device for the high-iron cyanide tailings has the advantages of beinghigh in heat transfer and mass transfer efficiency, thorough in cyanide decomposition, high in processing capacity and high in adaptability, being suitable for large-scale industrial production and the like.

Description

technical field [0001] The invention belongs to the technical field of mineral processing, and in particular relates to a suspension magnetization roasting cyanide breaking-weak magnetic separation and iron extraction device for high ferricyanide tailings. Background technique [0002] High ferricyanide tailings are hazardous wastes discharged from gold concentrate after cyanidation operation. The tailings contain harmful components such as cyanide and heavy metal components; It reaches 30-40%, and contains a small amount of gold and other valuable metals; long-term storage of such hazardous waste not only occupies land, pollutes the environment, but also wastes resources; The new technology can not only solve the serious environmental pollution problem caused by its large stockpiling, but also form iron ore resources. [0003] Patent CN201610846576.9 discloses a method for synchronous and harmless recovery of gold, silver and iron from roasted cyanidation tailings. It prop...

Claims

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Application Information

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IPC IPC(8): C22B1/10B03C1/02
CPCB03C1/02C22B1/10
Inventor 高鹏韩跃新肖汉新袁帅李艳军孙永升
Owner 上海逢石科技有限公司
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