Process for purifying arsenic-containing mineral burned fume

A purification process and flue gas technology, applied in the field of flue gas purification and recovery of As2O3 flue gas purification, can solve the problems of high water consumption in the process, poor economic and technical indicators, and no recycling, etc., and achieves wide popularization and application value, Easy control and smooth operation

Inactive Publication Date: 2007-07-11
SHANDONG GUODA GOLD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] One is the pickling and purification process of flue gas using furnace gas cooler-cyclone dust collector-electrostatic precipitator-inner spray venturi scrubber-packed tower scrubber-intercooler-electrostatic demister, etc. , so that the mineral dust and As in the flue gas 2 o 3 , SeO 2 and other harmful impurities are removed; but As 2 o 3 , SeO 2 Such harmful impurities enter the dilute acid, and the dilute acid is discharged after being neutralized by lime, and the As in it 2 o 3 not being recycled
[0005] Another method is to use the water washing and purification process of furnace gas cooler-cyclone dust collector-inner spray venturi scrubber-foam tower scrubber-internal spray venturi scrubber-demister, etc., to make the flue gas Mineral dust, As 2 o 3 , SeO 2 Such harmful impurities enter the wastewater, and the wastewater is discharged after being neutralized by lime; the As in it 2 o 3 It has not been recycled, and the process consumes too much water, and the economic and technical indicators are not good, so it has been eliminated

Method used

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  • Process for purifying arsenic-containing mineral burned fume

Examples

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Embodiment 1

[0028] After the flue gas from the fluidized roasting furnace is collected and cooled by the furnace gas cooler-cyclone dust collector-electrostatic precipitator, etc., the temperature of the flue gas at the outlet of the electrostatic precipitator is controlled to drop to 280°C, and then it is introduced into the spray cooling tower 1, adjusted The water intake of the atomized water nozzle 2 makes the temperature of the flue gas at the outlet of the spray cooling tower 1 drop rapidly to 120°C. At this time, As 2 o 3 Crystallization becomes solid powder, enters pulse bag arsenic collector 3 to filter, As 2 o 3 The crystalline powder is sent to the packaging machine 5 for packaging through the screw conveyor 4 at the lower part of the pulse bag arsenic collector 3 .

[0029] Recovery of As 2 o 3 For the future flue gas, use conventional pickling flue gas purification methods such as internal spray venturi scrubber-packed tower scrubber-intercooler-electrostatic demister to ...

Embodiment 2

[0031] The difference between this embodiment and embodiment 1 is that

[0032] After the flue gas from the fluidized roasting furnace is collected and cooled by the furnace gas cooler-cyclone dust collector-electrostatic precipitator, etc., the temperature of the flue gas at the outlet of the electrostatic precipitator is controlled to drop to 260°C, and then it is introduced into the spray cooling tower 1, adjusted The water intake of the atomized water nozzle 2 makes the temperature of the flue gas at the outlet of the spray cooling tower 1 drop rapidly to 100°C. At this time, As 2 o 3 Crystallization becomes solid powder, enters pulse bag arsenic collector 3 to filter, As 2 o 3 The crystalline powder is sent to the packaging machine 5 for packaging through the screw conveyor 4 at the lower part of the pulse bag arsenic collector 3 .

Embodiment 3

[0034] The difference between this embodiment and embodiment 1 is that

[0035] After the flue gas from the fluidized roaster is collected and cooled by the furnace gas cooler-cyclone dust collector-electrostatic precipitator, etc., the temperature of the flue gas at the outlet of the electrostatic precipitator is controlled to drop to 300°C, and then it is introduced into the spray cooling tower 1, adjusted The water intake of the atomized water nozzle 2 makes the temperature of the flue gas at the outlet of the spray cooling tower 1 drop rapidly to 140°C. At this time, As 2 o 3 Crystallization becomes solid powder, enters pulse bag arsenic collector 3 to filter, As 2 o 3 The crystalline powder is sent to the packaging machine 5 for packaging through the screw conveyor 4 at the lower part of the pulse bag arsenic collector 3 .

[0036] The technology of the present invention is applicable to the treatment of gold concentrates containing 1% to 10% of arsenic, preferably 4% ...

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Abstract

The invention relates to a method for purifying the burning smoke of arsenic mineral, especially the method for recycling As2O3 from the burning smokes of arsenic aurin mine, arsenic brass, and arsenopyrite, wherein the invention is characterized in that: it uses gas cooler, cyclone dust collector, statistic dust collector, atomizing cooler, pulse bag arsenic collector, ejection tubular washer, stuff tower washer, statistic defroster to treat the smoke to remove the dust, As2O3, SeO2, etc. The invention can produce continuously, with simple and stable operation.

Description

1. Technical field [0001] The invention relates to a method for recovering As from the roasting flue gas of arsenic-containing sulfide ore 2 o 3 Flue gas purification method, especially the recovery of As from multi-stage roasting flue gas such as arsenic-containing gold concentrate, arsenic-containing pyrite, arsenopyrite, etc. 2 o 3 The method for purifying flue gas belongs to the technical field of precious metal roasting metallurgy and chemical industry. 2. Background technology [0002] At present, in the production process of using gold sulfide concentrate to extract gold and using pyrite to make acid, there are strict requirements on the arsenic content in the mineral, because the arsenic compound will produce harmful As after roasting. 2 o 3 Gas affects the technical indicators of acid making and the quality of sulfuric acid, so it is generally required that the arsenic content in minerals should not exceed 1%. However, if the arsenic content in the ore is great...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/46B01D50/00C01G28/00
Inventor 吕寿明王志正高升吉王建政刘金才
Owner SHANDONG GUODA GOLD
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