CN103589869A - Method for selectively separating arsenic trioxide from non-ferrous metal smelter off-gas - Google Patents
Method for selectively separating arsenic trioxide from non-ferrous metal smelter off-gas Download PDFInfo
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- CN103589869A CN103589869A CN201310611092.2A CN201310611092A CN103589869A CN 103589869 A CN103589869 A CN 103589869A CN 201310611092 A CN201310611092 A CN 201310611092A CN 103589869 A CN103589869 A CN 103589869A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to a method for selectively separating arsenic trioxide from non-ferrous metal smelter off-gas, and belongs to the technical field of the non-ferrous metallurgy. The method is mainly characterized in that the off-gas enters a high temperature membrane module at a temperature of 500-700DEG C, so a gas traverses through a membrane filter core, and dusts are intercepted and adsorbed by a membrane through inertial impaction and the interception or diffusion effect to realize gas-solid separation. The method has the advantages of reasonable, controllable and stable process flow, high arsenic separation rate, high purity of the obtained arsenic extraction product, and no arsenic pollution in the smelting process.
Description
Technical field
The present invention relates to a kind of from non-ferrous metal metallurgy flue gas the method for selective separation white arsenic, belong to Non-ferrous Metallurgy field.
Background technology
In the last few years, various countries polluted more and more and paid attention to for arsenic, and environmental requirement is also more and more higher, makes the content finite quantity requirement of non-ferrous smelt enterprise to arsenic in concentrate used.But, because arsenic and copper, lead, zinc, cobalt, tin, antimony, gold are together with the frequent symbiosis of metal such as silver-colored, can not be thoroughly separated by general beneficiation method, inevitably there is part arsenic to enter in concentrate.The arsenic-containing smoke dust that colored metallurgical industrial produces is mainly from containing smelting, roasting or the waste residue fuming removal process of arsenic ore in the landfills such as copper, lead, zinc, cobalt, tin.According to statistics, the association of arsenic resource is in the Mineral resources such as gold, lead, zinc, copper, tin, and 1 ton of other metal of every exploitation (except gold), correspondingly take 0.12 ton～10.8 tons arsenic out of.10.6 ten thousand tons of arsenic of the annual approximately discharge of non-ferrous metal metallurgy industry.Wherein, the arsenic that copper is smelted discharge accounts for the more than 80% of whole non-ferrous metal metallurgy industry arsenic total emission volumn, and the arsenic quantity discharged of plumbous smelting industry accounts for 6.4%.
At present, the arsenic in non-ferrous metal metallurgy industry in flue gas enters in flue dust, belongs to harmful solid waste.Treatment process has following several: chemical process, biological method, physical method.The chemical process processing cost of arsenic solid waste is higher, and have also can produce topsoil.In addition, under biological action, inorganic arsenic is converted into after volatility methyl arsenic, and its toxic action can significantly increase, so, also do not have suitable biological method to process containing the harmful solid waste of arsenic at present.
Summary of the invention
The present invention is mainly for the deficiencies in the prior art, propose a kind of from non-ferrous metal metallurgy flue gas the method for selective separation white arsenic.The method, in arsenic-containing material smelting process, adopts separating technology stage by stage, and technical process is reasonable, controlled, stable, and arsenic separation rate is high, and the arsenic product purity of extraction is high, in smelting process, without arsenic, pollutes.
The present invention is achieved through the following technical solutions technical object; A method for selective separation white arsenic from non-ferrous metal metallurgy flue gas, it comprises following operation steps:
(1) press converter capacity and load arsenic-containing material, will in stove, be warming up to 200 ℃ and be incubated 60 minutes, the moisture in stove in arsenic-containing material becomes water vapor and discharges through blower fan;
(2) connect procedure furnace temperature is risen to 900 ~ 1100 ℃ and be incubated 60 ~ 120 minutes, under this temperature condition, arsenic-containing material is oxidized to white arsenic gas, and other metal is oxidized to oxide compound; This flue gas enters in the first surface cooler and electrostatic precipitator and purifies, and 500 ~ 700 ℃ of high-temperature flue gas after purification enter in high temperature membrane assembly, and low melting point impurity is absorbed, then scraper conveyor output; Unabsorbed white arsenic gas enters successively the second surface cooler and sack cleaner reclaims.
The membrane cartridge of described high temperature membrane assembly is ceramic membrane or alloy film, is preferably ceramic membrane; Ceramic membrane is the asymmetric membrane being prepared from through special process with inorganic ceramic material, in a tubular form and hyperchannel shape, and the tube wall micropore that gathers.
The present invention adopts selective separation arsenic technique, removes respectively the solid impurity in flue gas.Flue-gas temperature enters high temperature membrane assembly under 500 ~ 700 ℃ of conditions, and gas is through membrane cartridge, and dust tunicle under inertial impaction, interception or diffusional effect is held back absorption, realizes gas solid separation.Then low melting point impurity is exported by scraper conveyor.In the present invention, high temperature membrane component selection separate arsenic trioxide is core technology, makes arsenic at high temperature with white arsenic gaseous state mode and other impurity, realize selective separation.
The present invention's positive technique effect is compared with prior art: adopt selective separation technique, the white arsenic purity obtaining after all kinds of solid impurity separation is high, and whole technological process is controlled, stable.And white arsenic separation rate is high in flue gas, has avoided follow-up dust treatment, solved well the problem that non-ferrous metal metallurgy flue gas arsenic pollutes.
Accompanying drawing explanation
Fig. 1 is technological process block-diagram of the present invention.
Embodiment
Press technological process block-diagram shown in the drawings below, and the invention will be further described in conjunction with example.
From non-ferrous metal metallurgy flue gas, extract the method for white arsenic, it comprises following operation steps:
(1) press converter capacity and load arsenic-containing material, will in stove, be warming up to 200 ℃ and be incubated 60 minutes, the moisture in stove in arsenic-containing material becomes water vapor and discharges through blower fan.
(2) connect procedure furnace temperature is risen to 900 ~ 1100 ℃ and be incubated 60 ~ 120 minutes, under this temperature condition, containing arsenic arsenic material, be oxidized to white arsenic gas, other metal is oxidized to oxide compound, this flue dust sequentially enters in surface cooler and electrostatic precipitator and purifies, high-temperature flue gas after purification (500 ~ 700 ℃) enters in high temperature membrane assembly, low melting point impurity is absorbed, then scraper conveyor output; Unabsorbed white arsenic gas enters successively the second surface cooler and sack cleaner reclaims.
Embodiment does experiment with a year converter for processing 10t arsenic-containing material, and process of the test compares test by above-mentioned processing step under different parameters condition.Embodiment divides 5 groups to carry out, and its processing step, processing parameter and measured result see the following form.
Embodiment processing parameter and measured result data sheet
| Key element | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Furnace temperature (℃) | 900 | 950 | 1000 | 1050 | 1100 |
| Soaking time (℃) | 60 | 90 | 90 | 120 | 120 |
| Membrane module inlet temperature (℃) | 500 | 550 | 600 | 650 | 700 |
| Arsenic-removing rate (℃) | 87.58 | 90.26 | 95.65 | 95.78 | 95.89 |
From upper table data, embodiment tests by technical process of the present invention and parameter, its result all has obvious progress than prior art, the key technical indexes all increases, particularly embodiment 5, and arsenic-removing rate is 95.89%, and comprehensive energy consumption is considered, embodiment 3 the bests in the present invention, its all technical is all located a high position and good economy performance.
Claims (2)
1. a method for selective separation white arsenic from non-ferrous metal metallurgy flue gas, is characterized in that comprising following operation steps:
(1) press converter capacity and load arsenic-containing material, will in stove, be warming up to 200 ℃ and be incubated 60 minutes, the moisture in stove in arsenic-containing material becomes water vapor and discharges through blower fan;
(2) connect procedure furnace temperature is risen to 900 ~ 1100 ℃ and be incubated 60 ~ 120 minutes, under this temperature condition, arsenic-containing material is oxidized to white arsenic gas, and other metal is oxidized to oxide compound; This flue gas enters in the first surface cooler and electrostatic precipitator and purifies, and 500 ~ 700 ℃ of high-temperature flue gas after purification enter in high temperature membrane assembly, and low melting point impurity is absorbed, then scraper conveyor output; Unabsorbed white arsenic gas enters successively the second surface cooler and sack cleaner reclaims.
2. according to the method for a kind of described in claims 1 selective separation white arsenic from non-ferrous metal metallurgy flue gas, it is characterized in that: the membrane cartridge of described high temperature membrane assembly is ceramic membrane or alloy film, is preferably ceramic membrane; Ceramic membrane is the asymmetric membrane being prepared from through special process with inorganic ceramic material, in a tubular form and hyperchannel shape, and the tube wall micropore that gathers.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310611092.2A CN103589869A (en) | 2013-11-27 | 2013-11-27 | Method for selectively separating arsenic trioxide from non-ferrous metal smelter off-gas |
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| CN201310611092.2A CN103589869A (en) | 2013-11-27 | 2013-11-27 | Method for selectively separating arsenic trioxide from non-ferrous metal smelter off-gas |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104789786A (en) * | 2015-04-01 | 2015-07-22 | 郴州雄风环保科技有限公司 | Method for harmlessly treating arsenic-containing waste slag and comprehensively recycling valuable metals in arsenic-containing waste slag |
| CN105381665A (en) * | 2015-11-09 | 2016-03-09 | 红河绿地环保科技发展有限公司 | High temperature classification filtration treating method for smelting dust |
| CN107008725A (en) * | 2017-03-16 | 2017-08-04 | 袁俊智 | The processing method of the slag of dangerous waste containing arsenic is produced during a kind of copper smelting by pyrometallurgy flue gas acid preparing |
| CN109207743A (en) * | 2018-10-16 | 2019-01-15 | 郴州市金贵银业股份有限公司 | A method of recycling arsenic from arsenic-containing material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104789786A (en) * | 2015-04-01 | 2015-07-22 | 郴州雄风环保科技有限公司 | Method for harmlessly treating arsenic-containing waste slag and comprehensively recycling valuable metals in arsenic-containing waste slag |
| CN104789786B (en) * | 2015-04-01 | 2017-03-15 | 郴州雄风环保科技有限公司 | A kind of harmlessness disposing arsenic-containing waste residue and the method for synthetical recovery wherein valuable metal |
| CN105381665A (en) * | 2015-11-09 | 2016-03-09 | 红河绿地环保科技发展有限公司 | High temperature classification filtration treating method for smelting dust |
| CN107008725A (en) * | 2017-03-16 | 2017-08-04 | 袁俊智 | The processing method of the slag of dangerous waste containing arsenic is produced during a kind of copper smelting by pyrometallurgy flue gas acid preparing |
| CN109207743A (en) * | 2018-10-16 | 2019-01-15 | 郴州市金贵银业股份有限公司 | A method of recycling arsenic from arsenic-containing material |
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Application publication date: 20140219 |