CN101734718A - Method for reclaiming arsenic from high arsenic aurum ore concentrate roasting fume by wet process - Google Patents
Method for reclaiming arsenic from high arsenic aurum ore concentrate roasting fume by wet process Download PDFInfo
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- CN101734718A CN101734718A CN200810235574A CN200810235574A CN101734718A CN 101734718 A CN101734718 A CN 101734718A CN 200810235574 A CN200810235574 A CN 200810235574A CN 200810235574 A CN200810235574 A CN 200810235574A CN 101734718 A CN101734718 A CN 101734718A
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Abstract
The invention belongs to the technical field of environmental protection and in particular relates to a method for reclaiming arsenic from high arsenic aurum ore concentrate roasting fume by a wet process. The method comprises the following steps: firstly, roasting high arsenic aurum ore concentrate, and after dedusting the fume to collect a majority of dust, introducing the fume to an acid making purification process; performing three-level washing by 3 to 20 percent dilute acid, and finally preparing concentrated sulphuric acid; and washing collected As2O3-containig solution, removing SO2 gas, and performing cooling crystallization, centrifugal washing, dehydration and drying to prepare a As2O3 product. The method avoids environmental pollution of the high arsenic aurum ore concentrate and harm of As2O3 dust generated in the acid making process of the high arsenic aurum ore concentrate to environment and human bodies, fully utilizes high arsenic aurum ore concentrate resource, and produces qualified sulphuric acid, aurum slag and an arsenic product. The method can comprehensively reclaim multiple elements and has the advantages of continuous and stable process, good safety and good environmental protection significance and economic significance.
Description
Technical field: the invention belongs to environmental protection technical field, be specifically related to the method that the high arsenic fine gold ore roasting fume by wet process is received arsenic.
Background technology: at present, in the domestic high arsenic fine gold ore relieving haperacidity process, the As that contains in the baking flue gas
2O
3Processing, basically all adopt dry method to receive arsenic.The method unavoidably can produce dust pollution in process of production, and not only the recovery at arsenic has caused waste, has also polluted environment, has endangered operating personnel's health.
Summary of the invention: the purpose of this invention is to provide the method that a kind of high arsenic fine gold ore roasting fume by wet process is received arsenic, not only environmental protection but also economically valuable.
The principle of the invention mainly is: utilize As
2O
3The minimum characteristic of solubility in 50～60% concentration expressed in percentage by weights sulfuric acid of (following concentration all refers to percentage by weight), temperature (about 350 ℃) flue gas (As in washing with the sulfuric acid of this concentration
2O
3Be gaseous state under this temperature).Flue-gas temperature after the washing is down to rapidly about 100 ℃, As
2O
3Become crystal and be washed down, exist in the sulfuric acid scrubbing liquid.Three grades of weak acid scrubbings of the flue gas about 100 ℃ passes through dynamic wave scrubber subsequently again--one-level packing tower---secondary packing tower enter the two-stage electrostatic precipitator at last and further purify, and obtain qualified flue gas and enter acid making system and carry out conventional relieving haperacidity.In order to prevent As
2O
3Crystal stops up in equipment and pipeline, the As in the sulfuric acid
2O
3Crystalline content maintains about 3～30%.
The present invention is achieved like this: high arsenic fine gold ore is roasting in fluidized bed furnace, and flue gas enters the relieving haperacidity purification section after cleaner is accepted most dirt, with the sulfuric acid scrubbing cooling of 50～60% concentration expressed in percentage by weights, with As
2O
3Wet method is collected; And then with three grades of washings of diluted acid of 3～20% concentration expressed in percentage by weights, last flue gas enters acid making system and carries out conventional relieving haperacidity, produces the technical grade concentrated sulfuric acid; Collect the As that contains that gets off through the sulfuric acid scrubbing of 50～60% concentration expressed in percentage by weights
2O
3Solution is again through removing SO
2Gas, further cooling crystallization, centrifuge washing dehydration and dry make As
2O
3Product.
Usually high arsenic fine gold ore of the present invention carries out weak oxygen roasting or two-stage roasting in fluidized bed furnace; What produce after the roasting contains As
2O
3Flue gas after cleaner is accepted most dirt, enters purification section in 250～380 ℃.
The equipment of usually lowering the temperature with the sulfuric acid scrubbing of 50～60% concentration expressed in percentage by weights is void tower or dynamic wave scrubber; Wash the As that contains that collects
2O
3As in the solution
2O
3Crystalline content maintains concentration expressed in percentage by weight 3～30%; Wash the As that contains that collects
2O
3Solution need remove SO
2Gas and further cooling crystallization, this process is carried out in enamel reaction still; Wash the As that contains that collects
2O
3As in the solution
2O
3Horizontal type scraper centrifuger, material selection 904L are adopted in the crystal dehydration.
The present invention has not only stopped the pollution of high arsenic fine gold ore to environment, has also avoided adopting in the high arsenic minerals relieving haperacidity process dry method to receive the As that arsenic produces
2O
3Dust is to the harm of environment and human body, and takes full advantage of the high arsenic fine gold ore resource, produces qualified sulfuric acid, golden slag, arsenic product.This invention can comprehensively be reclaimed multielement, the technology continous-stable, and security is good, has good environment protection significance and economic implications.
Embodiment: the present invention is described in detail below in conjunction with embodiment.
Embodiment: the embodiment of the invention is that the high arsenic fine gold ore sulphuric acid plant wet arsenic with certain mining company is an example, and roasting workshop section electric precipitation pneumatic outlet condition is as follows:
Temperature :～350 ℃; Pressure :-3500Pa (gauge pressure); Flow: 50425Nm
3/ h;
Form: SO
2SO
3CO
2As
2O
3H
2O O
2N
2
(Nm
3/h)3112 173 627 23 19233 1133 26124
Electric cleaner outlet furnace gas, temperature at first enters void tower about 350 ℃, furnace gas contacts with 55% sulfuric acid phase of spray, moisture in 55% sulfuric acid is evaporated rapidly, and furnace gas temperature also decreases to (adiabatic humidification process) about 100 ℃, most dust, As in the furnace gas simultaneously
2O
3Be washed down Deng impurity.Furnace gas behind adiabatic humidification enters dynamic wave scrubber subsequently and carries out weak acid scrubbing, and temperature also decreases to about 72 ℃ (adiabatic humidification processes).Entering the two-stage packing tower again washs, cools off, further remove impurity such as dust in the furnace gas, arsenic, furnace gas temperature is reduced to below 30 ℃, enters the two-stage electrostatic precipitator subsequently, further remove impurity such as remaining dust and acid mist, make acid mist＜0.005g/m in the furnace gas
3, arsenic＜1.0mg/m
3, the flue gas that the final purification index is qualified enters acid making system and carries out conventional relieving haperacidity.
The sprayed slurry of void tower contains 150g/l As
2O
3, sulfuric acid concentration is about 55%, As in furnace gas
2O
3Constantly enter sprayed slurry, when content surpasses 150g/l, then have the chain control of void tower circulating-pump outlet to send into and receive the arsenic SO of workshop section
2The desorption still carries out desorption, cooling, and the cooling fluid overflow enters thickener, and the thickener underflow pumps into high-order dense arsenic groove, concentrate flows into centrifuge by potential difference in the dense arsenic groove, reaches the purpose of Separation of Solid and Liquid, and liquid phase enters the filtrate storage tank, solid phase enters the drying machine drying, dried solid phase As
2O
3Weighing, packing, accumulating.
The liquid phase major part of Separation of Solid and Liquid is returned the purification section void tower and is recycled, and the dirty acid of fraction enters in the spent acid and workshop section further processes.
High arsenic fine gold ore has solved the dust pollution that present domestic dry method is received arsenic effectively by the wet arsenic of baking flue gas, has protected environment and operator's personnel safety.And carried out the multielement composite recovery to containing high arsenic fine gold ore to greatest extent, had great environmental protection and economic worth.
Claims (7)
1. the method for a high arsenic fine gold ore baking flue gas receipts arsenic is characterized in that high arsenic fine gold ore roasting in fluidized bed furnace, and flue gas enters the relieving haperacidity purification section after cleaner is accepted most dirt, with the sulfuric acid scrubbing cooling of 50～60% concentration expressed in percentage by weights, with As
2O
3Wet method is collected; And then with three grades of washings of diluted acid of 3～20% concentration expressed in percentage by weights, last flue gas enters acid making system and carries out conventional relieving haperacidity, produces the technical grade concentrated sulfuric acid; Collect the As that contains that gets off through the sulfuric acid scrubbing of 50～60% concentration expressed in percentage by weights
2O
3Solution is again through removing SO
2Gas, further cooling crystallization, centrifuge washing dehydration and dry make As
2O
3Product.
2. method according to claim 1 is characterized in that high arsenic fine gold ore carries out weak oxygen roasting or two-stage roasting in fluidizing furnace.
3. method according to claim 1, what produce after the high arsenic fine gold ore roasting contains As
2O
3Flue gas after cleaner is accepted most dirt, enters purification section in 250～380 ℃.
4. method according to claim 1 is characterized in that the equipment of lowering the temperature with the sulfuric acid scrubbing of 50～60% concentration expressed in percentage by weights is void tower or dynamic wave scrubber.
5. method according to claim 1 is characterized in that collecting the As that contains that gets off through the sulfuric acid scrubbing of 50～60% concentration expressed in percentage by weights
2O
3As in the solution
2O
3Crystalline content maintains concentration expressed in percentage by weight 3～30%.
6. method according to claim 1 is characterized in that collecting the As that contains that gets off through the sulfuric acid scrubbing of 50～60% concentration expressed in percentage by weights
2O
3Solution need remove SO
2Gas and further cooling crystallization, this process is carried out in enamel reaction still.
7. method according to claim 1 is characterized in that collecting the As that contains that gets off through the sulfuric acid scrubbing of 50～60% concentration expressed in percentage by weights
2O
3As in the solution
2O
3Horizontal type scraper centrifuger, material selection 904L are adopted in the crystal dehydration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810235574A CN101734718A (en) | 2008-11-21 | 2008-11-21 | Method for reclaiming arsenic from high arsenic aurum ore concentrate roasting fume by wet process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810235574A CN101734718A (en) | 2008-11-21 | 2008-11-21 | Method for reclaiming arsenic from high arsenic aurum ore concentrate roasting fume by wet process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101734718A true CN101734718A (en) | 2010-06-16 |
Family
ID=42458832
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810235574A Pending CN101734718A (en) | 2008-11-21 | 2008-11-21 | Method for reclaiming arsenic from high arsenic aurum ore concentrate roasting fume by wet process |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103120877A (en) * | 2013-02-20 | 2013-05-29 | 山东天力干燥股份有限公司 | Dust containing tail gas insulating and washing and water recovery process |
| CN104548823A (en) * | 2014-12-24 | 2015-04-29 | 中国恩菲工程技术有限公司 | Method and system for treating arsenic-containing metallurgical off-gas |
| CN104803416A (en) * | 2015-04-08 | 2015-07-29 | 北京矿冶研究总院 | Arsenic collecting method for arsenic-containing flue gas |
| CN112370951A (en) * | 2020-09-10 | 2021-02-19 | 矿冶科技集团有限公司 | Method and system for removing arsenic from smelting flue gas by wet method |
| CN113289473A (en) * | 2021-06-11 | 2021-08-24 | 封云 | Method for treating heavy metal before smelting flue gas desulfurization |
-
2008
- 2008-11-21 CN CN200810235574A patent/CN101734718A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103120877A (en) * | 2013-02-20 | 2013-05-29 | 山东天力干燥股份有限公司 | Dust containing tail gas insulating and washing and water recovery process |
| CN104548823A (en) * | 2014-12-24 | 2015-04-29 | 中国恩菲工程技术有限公司 | Method and system for treating arsenic-containing metallurgical off-gas |
| CN104548823B (en) * | 2014-12-24 | 2016-08-31 | 中国恩菲工程技术有限公司 | Processing method and system containing arsenic flue gas during smelting |
| CN104803416A (en) * | 2015-04-08 | 2015-07-29 | 北京矿冶研究总院 | Arsenic collecting method for arsenic-containing flue gas |
| CN112370951A (en) * | 2020-09-10 | 2021-02-19 | 矿冶科技集团有限公司 | Method and system for removing arsenic from smelting flue gas by wet method |
| CN113289473A (en) * | 2021-06-11 | 2021-08-24 | 封云 | Method for treating heavy metal before smelting flue gas desulfurization |
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Open date: 20100616 |