High arsenicum gold ore roasting smoke gas treatment system and method for recovering arsenicum and desulfurating

Active Publication Date: 2012-02-15
NORTHWEST RES INST OF MINING & METALLURGY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-arsenic gold ore roasting flue gas treatment system to solve the problems of waste of arsenic resources in the high-arsenic gold ore roasting flue gas and environmental pollution caused by a large amount of arsenic-containing hazardous waste generated by wet treatment

Method used

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  • High arsenicum gold ore roasting smoke gas treatment system and method for recovering arsenicum and desulfurating
  • High arsenicum gold ore roasting smoke gas treatment system and method for recovering arsenicum and desulfurating

Examples

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Embodiment 1

[0030] Embodiment 1 The method for recovering arsenic in the high-arsenic gold ore roasting flue gas treatment system of the present invention comprises the following steps:

[0031] a. Roasting flue gas dedusting

[0032] When the high-temperature roasting flue gas is at a temperature of about 380-500°C, the dust concentration is 23437.5mg / m 3 、As 2 o 3 Concentration 1367.5 mg / m 3 , SO 2 Concentration 8325 mg / m 3 (Taking the roasting flue gas of gold ore containing 0.39% arsenic and 1.21% sulfur as an example), the flue gas first passes through the settling chamber 1 and the secondary cyclone dust collector 2 to remove large dust particles, and then passes through the electrostatic precipitator 4 to remove fine dust particles. At this time, the temperature of the flue gas at the outlet of the electrostatic precipitator 4 is controlled at 380-470°C; the dust concentration after the dust removal by the electrostatic precipitator 4 is 187.5 mg / m 3 、As 2 o 3 Concentration...

Embodiment 2

[0039] Embodiment 2 The method for desulfurization of the high-arsenic gold ore roasting flue gas treatment system of the present invention,

[0040] Including the turbulence washing step, the outlet temperature of the flue gas from the bag arsenic collector 8 in Example 1 is about 120°C, the flue gas enters the first-stage turbulent scrubber 10 for desulfurization, and then is introduced by the fan 12 into the second-level turbulent scrubber 13 The flue gas can be discharged up to standard after further desulfurization treatment.

Embodiment 3

[0041] Example 3 The method for desulfurization of the high-arsenic gold ore roasting flue gas treatment system. In order to achieve better results, lime powder with a mass content > 80% is used. The mass ratio of Ca and S in the lime powder is 1.5-2. The lime powder Pour it into the milk of lime preparation tank 15, start the agitator installed in the milk of lime preparation tank 15, and dilute it with water into 10% lime emulsion; The liquid accumulation tank in the liquid accumulation tank and the secondary turbulent scrubber 13 is used as a desulfurization absorbent, and is sprayed from the primary turbulent scrubber 10 and the secondary turbulent scrubber through the primary circulation pump 11 and the secondary circulation pump 14 respectively. The upper part of 13 enters the exhaust gas to form a turbulent zone, and the SO in the exhaust gas 2 to absorb.

[0042] The washing liquid discharged from the primary turbulent scrubber 10 and the secondary turbulent scrubber ...

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Abstract

The invention discloses a high arsenicum gold ore roasting smoke gas treatment system and a method for recovering arsenicum and desulfurating, which can be used for mainly solving the problems that the arsenicum resource in the high arsenicum gold ore roasting smoke is wasted, and the environment is polluted by a large amount of hazardous wastes containing the arsenicum generated in wet processing. The high arsenicum gold ore roasting smoke gas treatment system comprises an arsenicum recovery system which comprises a settling chamber, a primary cyclone dust collector, a secondary cyclone dust collector, an electric dust collector, a water jacket cooler, a water circulating pump, a water circulating pond and a cloth bag arsenic collector. The high arsenicum gold ore roasting smoke gas treatment system provided by the invention also comprises a desulfurization system; and the method for recovering the arsenicum provided by the invention comprises the following steps of roasting smoke and dedusting, smoke drying cooling and arsenicum collecting by a cloth bag. The desulfurating method comprises the steps of rushing and washing. The invention has the advantages of being stable in process, high in arsonium recovery rate, high in product purity, low in gypsum arsenicum content and less in environmental pollution.

Description

technical field [0001] The invention relates to the field of comprehensive utilization and pollution control of high-arsenic gold ore roasting flue gas, in particular to a treatment system for high-arsenic gold ore roasting flue gas and a method for recovering arsenic and desulfurizing. Background technique [0002] At present, the treatment of high-arsenic flue gas from gold mine roasting at home and abroad mostly adopts two-stage cyclone dust removal + electric dust collection + wet washing to remove arsenic. Although the purpose of dust removal and arsenic removal is achieved, arsenic resources are wasted and high arsenic content , Sulfur-containing hazardous waste residue. Although some enterprises use spray cooling towers and cloth bags to recover arsenic, due to the difficult control of production conditions, spray cooling towers can easily lead to an increase in the moisture content in the flue gas, and arsenic trioxide absorbs moisture and increases the viscosity to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D50/00B01D53/80B01D53/50B01D7/02
Inventor 张军英王兴峰朱来东吴世洋李卫东吉鸿安许素敏
Owner NORTHWEST RES INST OF MINING & METALLURGY INST
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