CN107399721A - A kind of pyrogenic process recoverying and utilizing method of nitrogenous sulfur-bearing molysite - Google Patents
A kind of pyrogenic process recoverying and utilizing method of nitrogenous sulfur-bearing molysite Download PDFInfo
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- CN107399721A CN107399721A CN201710552003.XA CN201710552003A CN107399721A CN 107399721 A CN107399721 A CN 107399721A CN 201710552003 A CN201710552003 A CN 201710552003A CN 107399721 A CN107399721 A CN 107399721A
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- Prior art keywords
- sulfur
- molysite
- bearing
- nitrogenous
- iron
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
- C01B17/501—Preparation of sulfur dioxide by reduction of sulfur compounds
- C01B17/507—Preparation of sulfur dioxide by reduction of sulfur compounds of iron sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/74—Preparation
- C01B17/745—Preparation from sulfates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
- C01B21/38—Nitric acid
- C01B21/42—Preparation from nitrates
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention discloses a kind of pyrogenic process recoverying and utilizing method of nitrogenous sulfur-bearing molysite, belong to secondary resource utilization technology field.Denitrogenation is dried in nitrogenous sulfur-bearing molysite, the flue gas and sulfur-bearing molysite of output nitrogen-containing oxide, realizes the separation of nitrogen and iron, element sulphur；It is used for nitric acid processed after the off-gas recovery of nitrogen-containing oxide, sulfur-bearing molysite carries out high-temperature calcination, the flue gas and iron oxide of output sulfur-containing oxide, realizes the separation of element sulphur and ferro element；It is used for Sulphuric acid after the off-gas recovery of sulfur-containing oxide, iron oxide realizes the innoxious of nitrogenous sulfur-bearing molysite and clean processing as iron ore concentrate export trade.Present invention process flow is short, technical conditions are easily controllable, simple to operate, realizes iron in nitrogenous sulfur-bearing molysite, sulphur, the recycling of nitrogen and recycles.
Description
Technical field
The invention belongs to secondary resource utilization technology field, the pyrogenic process recovery profit of specifically a kind of nitrogenous sulfur-bearing molysite
Use method.
Background technology
Traditional nickel electrolyte iron removaling uses yellow modumite method more, and this method iron removaling alkaline consumption is high, and the iron vitriol dreg of yellow sodium of output contains
Valency metal is high, and the valuable metal such as nickel therein, iron can not be realized and recycled, and cause metal direct yield to be remarkably decreased.In order to
The cost of nickel electrowinning wet method iron removal is reduced, improves the direct yield of valuable metal, traditional handicraft uses pyrogenic process iron removaling, output
Iron content is less than 3% secondary nickel ore concentrate, but because iron is similar with the property of cobalt, in pyrogenic process iron removal, substantial amounts of cobalt is also with iron
Enter together in slag, cause the rate of recovery straight line of cobalt to decline.In consideration of it, the method processing that nickel fibers new technology is leached using nitric acid
The ambrose alloy sulfide of iron content, makes the iron in ambrose alloy sulfide all be leached into leachate, and for this leachate using heat
Iron in solution is converted into nitrogenous sulfur-bearing molysite by the method for solution iron removaling, 30-50% containing Fe, SO in the nitrogenous sulfur-bearing molysite4 2-
5-45%、NO3 -5-20%, it is impossible to direct export trade, if being stored up as solid waste, can be caused while environmental pollution is caused
The serious waste of resource.
The content of the invention
It is simple to operate it is an object of the invention to provide a kind of technological process is short, the fire of environment-friendly nitrogenous sulfur-bearing molysite
Method recoverying and utilizing method, realize the recycling of nitrogenous sulfur-bearing molysite.
A kind of pyrogenic process recoverying and utilizing method of nitrogenous sulfur-bearing molysite of the present invention, its technical scheme are as follows：By nitrogenous sulfur-bearing iron
Denitrogenation is dried in salt, the flue gas and sulfur-bearing molysite of output nitrogen-containing oxide, realizes the separation of nitrogen and iron, element sulphur；Contain
It is used for nitric acid processed after the off-gas recovery of nitrogen oxides, sulfur-bearing molysite carries out high-temperature calcination, the flue gas and oxygen of output sulfur-containing oxide
Change iron, realize the separation of element sulphur and ferro element；It is used for Sulphuric acid after the off-gas recovery of sulfur-containing oxide,
Iron oxide is as iron ore concentrate export trade.Specifically include following steps：
A. nitrogenous sulfur-bearing molysite is dried denitrogenation, 200-400 DEG C of drying temperature, drying time 1.5-2.5h, output is nitrogenous
The flue gas and sulfur-bearing molysite of oxide；
B. by the off-gas recovery of nitrogen-containing oxide in step a, for nitric acid processed；
C. sulfur-bearing molysite in step a is subjected to high-temperature calcination, 1000-1100 DEG C of calcining heat, calcination time 1.0-2.0h, production
Go out ＞ containing Fe 60% iron ore concentrate and the flue gas of sulfur-containing oxide；
D. by the off-gas recovery of the sulfur-containing oxide in step c, for Sulphuric acid.
In above-mentioned steps a, preferably drying temperature is 200-400 DEG C, and temperature too high energy consumption is larger, too low, Nitrate elimination
Rate is low；It is preferred that drying time is 1.5-2.5h, similarly, drying time, oversize energy consumption was larger, and too short Nitrate elimination rate is low.
The pyrogenic process recoverying and utilizing method of the nitrogenous sulfur-bearing molysite of the present invention has advantages below：
1st, the iron in nitrogenous sulfur-bearing molysite is converted into high-grade iron ore concentrate by the present invention, and sulphur is changed into sulfur dioxide, is used for
Sulphuric acid, nitrogen is changed into nitrogen oxides, for nitric acid processed, realizes the innoxious of nitrogenous sulfur-bearing molysite and clean processing.
2nd, present invention process flow is short, technical conditions are easily controllable, simple to operate, realize iron in nitrogenous sulfur-bearing molysite,
Sulphur, the recycling of nitrogen recycle.
Embodiment
The pyrogenic process recoverying and utilizing method of the nitrogenous sulfur-bearing molysite of the present invention is described further with reference to specific embodiment.
Embodiment 1
The composition of nitrogenous sulfur-bearing molysite（Mass percent）For：Fe 30%、SO4 2- 45%、NO3 -5%.First by the nitrogenous sulfur-bearing
Denitrogenation, 200 DEG C, drying time 1.5h of drying temperature is dried in molysite, and obtained sulfur-bearing molysite composition is：Fe 32.81%、
SO4 2- 48.87%、NO3 -0.051, yield 93%, the off-gas recovery of nitrogen-containing oxide, for nitric acid processed；Sulfur-bearing molysite is through high temperature
Desulfurization, 1100 DEG C, calcination time 2h of calcining heat are calcined, obtained iron ore concentrate composition is：Fe 69.5%、SO4 2- 0.25%、NO3 -
0.052%, yield 50%, the off-gas recovery of sulfur-containing oxide, for Sulphuric acid.The removal efficiency of whole process nitrogen is 98.14%, sulphur
Removal efficiency be 99.69%.
Embodiment 2
The composition of nitrogenous sulfur-bearing molysite（Mass percent）For：Fe 50%、SO4 2- 5%、NO3 -20%.First by the nitrogenous sulfur-bearing
Denitrogenation, 400 DEG C, drying time 2.5h of drying temperature is dried in molysite, and obtained sulfur-bearing molysite composition is：Fe 56%、SO4 2-
6.8%、NO3 -0.05, yield 73%, the off-gas recovery of nitrogen-containing oxide, for nitric acid processed；Sulfur-bearing molysite through high-temperature calcination desulfurization,
1000 DEG C, calcination time 1h of calcining heat, obtained iron ore concentrate composition are：Fe 65%、SO4 2- 0.23%、NO3 -0.05%, yield
92%, the off-gas recovery of sulfur-containing oxide, for Sulphuric acid.The removal efficiency of whole process nitrogen is 98.54%, and the removal efficiency of sulphur is
99.55%。
Embodiment 3
The composition of nitrogenous sulfur-bearing molysite（Mass percent）For：Fe 40%、SO4 2- 35%、NO3 -10%.This nitrogenous is contained first
Denitrogenation, 300 DEG C, drying time 2.0h of drying temperature is dried in sulphur molysite, and obtained sulfur-bearing molysite composition is：Fe45%、SO4 2-
38%、NO3 -0.045, yield 86%, the off-gas recovery of nitrogen-containing oxide, for nitric acid processed；Sulfur-bearing molysite through high-temperature calcination desulfurization,
1050 DEG C, calcination time 1.5h of calcining heat, obtained iron ore concentrate composition are：Fe 68%、SO4 2- 0.21%、NO3 -0.045%,
Yield 59%, the off-gas recovery of sulfur-containing oxide, for Sulphuric acid.The removal efficiency of whole process nitrogen is 98.26%, the removal efficiency of sulphur
For 99.66%.
Claims (3)
1. a kind of pyrogenic process recoverying and utilizing method of nitrogenous sulfur-bearing molysite, it is characterised in that comprise the following steps：
A. denitrogenation, the flue gas and sulfur-bearing molysite of output nitrogen-containing oxide is dried in nitrogenous sulfur-bearing molysite；
B. by the off-gas recovery of nitrogen-containing oxide in step a, for nitric acid processed；
C. sulfur-bearing molysite in step a is subjected to high-temperature calcination, 1000-1100 DEG C of calcining heat, calcination time 1.0-2.0h, production
Go out ＞ containing Fe 60% iron ore concentrate and the flue gas of sulfur-containing oxide；
D. by the off-gas recovery of the sulfur-containing oxide in step c, for Sulphuric acid.
A kind of 2. pyrogenic process recoverying and utilizing method of nitrogenous sulfur-bearing molysite according to claim 1, it is characterised in that：Step a
In, the drying temperature is 200-400 DEG C.
A kind of 3. pyrogenic process recoverying and utilizing method of nitrogenous sulfur-bearing molysite according to claim 1 or 2, it is characterised in that：Step
In rapid a, the drying time 1.5-2.5h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710552003.XA CN107399721B (en) | 2017-07-07 | 2017-07-07 | Pyrogenic method recycling method of ferric salt containing nitrogen and sulfur |
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|---|---|---|---|
| CN201710552003.XA CN107399721B (en) | 2017-07-07 | 2017-07-07 | Pyrogenic method recycling method of ferric salt containing nitrogen and sulfur |
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| CN107399721A true CN107399721A (en) | 2017-11-28 |
| CN107399721B CN107399721B (en) | 2020-04-07 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101768661A (en) * | 2008-12-29 | 2010-07-07 | 厦门紫金矿冶技术有限公司 | Method for comprehensive utilization of iron and sulfur in tailing containing iron and sulfur |
| CN102344124A (en) * | 2011-07-12 | 2012-02-08 | 湖南恒光科技股份有限公司 | Process for co-producing sulfuric acid, fine iron powder and iron oxide red by ferrous sulfate heptahydrate and pyrite |
| CN102367169A (en) * | 2011-05-23 | 2012-03-07 | 中国石油化工集团公司 | Method for preparation of sulfuric acid and combined production of fine flour iron through calcination of coal-derived pyrite in presence of oxygen-rich air |
| CN103060547A (en) * | 2013-02-07 | 2013-04-24 | 陈建湘 | Method for restoring, roasting, purifying, and extracting manganese and iron by utilizing electrolytic manganese slag rotary kiln |
| CN105110301A (en) * | 2015-08-04 | 2015-12-02 | 山东国大黄金股份有限公司 | Method for improving transparency of acid prepared from secondary baking flue gas of cyanidation tailings |
-
2017
- 2017-07-07 CN CN201710552003.XA patent/CN107399721B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101768661A (en) * | 2008-12-29 | 2010-07-07 | 厦门紫金矿冶技术有限公司 | Method for comprehensive utilization of iron and sulfur in tailing containing iron and sulfur |
| CN102367169A (en) * | 2011-05-23 | 2012-03-07 | 中国石油化工集团公司 | Method for preparation of sulfuric acid and combined production of fine flour iron through calcination of coal-derived pyrite in presence of oxygen-rich air |
| CN102344124A (en) * | 2011-07-12 | 2012-02-08 | 湖南恒光科技股份有限公司 | Process for co-producing sulfuric acid, fine iron powder and iron oxide red by ferrous sulfate heptahydrate and pyrite |
| CN103060547A (en) * | 2013-02-07 | 2013-04-24 | 陈建湘 | Method for restoring, roasting, purifying, and extracting manganese and iron by utilizing electrolytic manganese slag rotary kiln |
| CN105110301A (en) * | 2015-08-04 | 2015-12-02 | 山东国大黄金股份有限公司 | Method for improving transparency of acid prepared from secondary baking flue gas of cyanidation tailings |
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| CN107399721B (en) | 2020-04-07 |
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