CN101870493A - Method for comprehensively treatment of pyrite and desulphurized gypsum by utilizing coal and system thereof - Google Patents
Method for comprehensively treatment of pyrite and desulphurized gypsum by utilizing coal and system thereof Download PDFInfo
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- CN101870493A CN101870493A CN201010147666A CN201010147666A CN101870493A CN 101870493 A CN101870493 A CN 101870493A CN 201010147666 A CN201010147666 A CN 201010147666A CN 201010147666 A CN201010147666 A CN 201010147666A CN 101870493 A CN101870493 A CN 101870493A
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a method for comprehensively treatment of pyrite and desulphurized gypsum by utilizing coal and a system thereof. Coal and CO produced by the same are taken as reducing agents, the pyrite is directly reduced into reduced ferrum Fe and simple substance sulphur S, the desulphurized gypsum is reduced and decomposed into lime CaO and SO2, SO2 is used for preparing sulphuric acid or simple substance sulphur, and the lime CaO can be returned to a desulphurization system to be used as desulphurizing agent or ferrous metallurgy auxiliary material, thus sulphur and ferrum resources are recycled. The system is composed of a fluidized bed pyrite decomposing device, a fluidized bed desulphurized gypsum reaction device, a pyrite feeding device, a coal feeding device, a CO rapid cooling device, a high temperature non-mechanical valve, a desulphurized gypsum drying and feeding device, an ash cooling device, a Fe/CaO collecting and sorting device, a CaO returning device, a combustion starting chamber, a CO combustion device, a CO2/SO2 cooling and sulphuric acid producing device, a CO2 storage tank, a fan and pipelines.
Description
Technical field
The present invention relates to a kind of method and system that utilizes coal comprehensively treatment of pyrite and desulfurated plaster, belong to the solid waste disposal technical field.
Technical background
With fire coal is that a large amount of utilizations of main fossil energy have brought the serious environmental pollution, as ember power station discharging SO
2, NO
x, CO
2With heavy metal etc., a series of environmental problems such as acid rain, Global climate change have been caused.At present, adopt with calcium-base absorbing agent cheap and easy to get (CaO, Ca (OH)
2, CaCO
3) be that main dry/wet flue gas desulfurization technique (Flue Gas Desulphurization) becomes the main flow desulfurization technology of large-scale application in the world.The main component of desulfurization ash has CaSO
3,, CaO (OH)
2, CaCO
3, flying dust etc. because its complicated component, fluctuation are too big, and contain impurity such as phosphorus, fluorine, heavy metal, mostly adopt " abandoning method " to handle, also brought serious solid waste secondary pollution problem thus.Remove 1 ton of SO theoretically
2Can produce 2.7 tons of desulfurated plaster (CaSO
42H
2O).Along with the increasing of Environmental Protection in China dynamics, estimate that the desulfurated plaster output that China stores up in 2 years of future will be above 100,000,000 tons.If desulfurated plaster is not carried out reasonable use, not only take a large amount of land resources, cause the severe contamination at soil and water source, and wasted a large amount of sulphur, calcium resource.
At present, desulfurated plaster is mainly used in fields such as building materials, building and agricultural, as cement setting retarder, building gypsum plaster, plasterboard, gypsum block and soil improvement agent etc.Developed country (as Japan, Germany) has solved technical difficult problems such as desulfurated plaster transportation, drying, modification, application better, its quality of desulphurization gypsum is stable, average utilization reaches more than 97.5%, is mainly used in to produce semi-hydrated gypsum powder and cement setting retarder.Shorter in the history that China desulfurated plaster produces, fully utilize at the early-stagely, technology, technology reach a standard far away.Patent CN1958498A discloses a kind of method that adopts desulfurized gesso of flue gas to produce sulfuric acid and cement, it be with after the desulfurated plaster drying, with contain Fe
2O
3, Al
2O
3, SiO
2Mix with the material of carbon,, obtain SO 900-1450 ℃ of calcining
2And cement clinker, gained SO
2Be used to prepare industrial sulphuric acid.Patent CN101314462A discloses a kind of high-sulfur coal that utilizes makes desulfurated plaster reduction classification reclaim the method for sulphur resource jointly producing cement grog as reductive agent, be with high-sulfur coal and dried desulfurated plaster with 1: mass ratio (7-20) adds in 800-1400 ℃ of reduction furnace and decomposes, the gas of output is used to produce sulfuric acid, and solid slag carries out manufacture of cement as cement raw material.Patent CN101337684A discloses a kind of method of recovering sulfur and co-producing calcium carbonate from desulphurization gypsum, is to be that reductive agent is produced sulfurated lime with CO, further generates SO
2As producing vitriolic unstripped gas, the product C aCO after the desulfurization
3Return as sweetening agent and recycle.However, the desulfurated plaster comprehensive treatment technique of exploitation still exists desulfurated plaster treatment process system complex, reaction unit temperature height, handles defectives such as the solid waste quality is single, the treatment time is long at present.
Summary of the invention
The objective of the invention is to overcome process system complexity, treatment temp height that existing desulfurated plaster comprehensive utilization exists, handle problems such as quality is single, long reaction time, provide a kind of based on thermochemical techniques, utilize the method and system of coal comprehensively treatment of pyrite and desulfurated plaster.
The present invention utilizes the CO of carbon in the carbonaceous material (coal) and generation thereof as reductive agent, under reducing atmosphere with sulfurous iron ore (FeS
2) be reduced into direct-reduced iron Fe and elemental sulfur S, with CaSO
4Resolve into CaO and SO
2Gas; The CaO that generates can return that desulphurization system recycles or as the auxiliary material of iron and steel enterprise, SO
2Be used to produce sulfuric acid or elemental sulfur, Fe and elemental sulfur S can be directly as production marketings, the CO that reaction process produces
2Fluidizing medium as fluidized bed reaction recycles, CO
2Concentrating the back sells as Industrial products.
Method and technology scheme of the present invention is as follows:
Utilize the method for coal comprehensively treatment of pyrite and desulfurated plaster, comprise the following steps:
1) mine tailing of power station pulverized coal preparation system discards and mining engineering is collected and sorting, obtained sulfurous iron ore FeS
2Solid waste;
2) with FeS
2, to send into temperature be to carry out decomposition reaction in 650～950 ℃ the fluidized-bed sulfurous iron ore decomposer for CaO and coal, directly reduced Fe, CaS, sulphur steam and CO; The gas that contains sulphur steam and CO reclaims elemental sulfur by condensing works, the CO that the CO burning generates
2Be stored in the storage tank, directly reduce Fe and CaS then to enter fluid-bed sweetening gypsum decomposer by high temperature non-mechanical valve;
3) sending into temperature through the exsiccant desulfurated plaster is 800-1050 ℃ of fluid-bed sweetening gypsum decomposer; In this device, CaS and CaSO
4Reaction generates lime CaO and SO
2, contain CO
2And SO
2After the gas process is separated, SO
2Be used to produce sulfuric acid, CO
2Be stored in CO through compressor
2In the storage tank; The solid materials that contains Fe, CaO is after overcooling, isolate direct reduction Fe wherein, CaO then enters the warehouse jar, and portion C aO is transported to fluidized-bed sulfurous iron ore decomposer, returns after all the other CaO reclaim that desulphurization system recycles or uses as the auxiliary material of iron and steel enterprise.
Available reaction (1) of reacting in fluidized-bed sulfurous iron ore decomposer involved in the present invention and reaction (2) are described, and the available reaction of reaction (3) in fluid-bed sweetening gypsum decomposer is described, and total reaction can be described with reaction (4).
FeS
2＝FeS+S (1)
FeS+C+CaO＝Fe+CaS+CO (2)
CaS+3CaSO
4＝4CaO+4SO
2 (3)
FeS
2+3CaSO
4+C+1/2O
2＝Fe+3CaO+4SO
2+S+CO
2 (4)
As the further improvement of the inventive method, described step 2) in the CO that generates of CO burning
2, as the supplemental heat source of fluid-bed sweetening gypsum decomposer.
As the further improvement of the inventive method, described CO
2CO in the storage tank
2Through behind the pipe pressurizing as the fluidisation power of fluidized-bed sulfurous iron ore decomposer, fluid-bed sweetening gypsum decomposer and ash cooling device.
As the further improvement of the inventive method, described CO
2CO in the storage tank
2A part as heat-eliminating medium after condensing works heating, as the siccative of dry desulfurated plaster.
The technical scheme of system of the present invention is: the system that utilizes coal comprehensively treatment of pyrite and desulfurated plaster, form by fluidized-bed sulfurous iron ore decomposer, fluid-bed sweetening gypsum reaction unit and corresponding subsystem thereof, mainly comprise fluidized-bed sulfurous iron ore decomposer, fluid-bed sweetening gypsum reaction unit, sulfurous iron ore feeding device, coal feeding device, CO quickly cooling device, high temperature non-mechanical valve, desulfurated plaster drying and feeding device, ash cooling device, Fe and CaO collection and sorting unit, CaO material-returning device, start combustion chamber, CO combustion unit, CO
2/ SO
2Cooling and tripping device, CO
2Storage tank, SO
2System sulfuric acid apparatus, blower fan and pipeline; Be stored in Pulverized Coal Bin behind the coal process coal pulverizer grinding, by feeding device coal dust sent into fluidized-bed sulfurous iron ore decomposer again; FeS
2Through being stored in the sulfurous iron ore storehouse behind the troilite powder grinding machine grinding, again by feeding device with FeS
2Powder is sent into fluidized-bed sulfurous iron ore decomposer; The air compartment place is provided with startup combustion chamber, high temperature non-mechanical valve and slag discharging device respectively in fluidized-bed sulfurous iron ore decomposer bottom; Coal, FeS
2, and in fluidized-bed sulfurous iron ore decomposer, carry out reduction reaction from the CaO of CaO storage tank, the gaseous product that reaction produces is after hot precipitator, CO burning device and the cooling of flue gas condensing device, the elemental sulfur of recovery is stored in the sulphur storage warehouse; The compressed machine of cooled smoke is stored in CO
2In the storage tank; Solid materials in the fluidized-bed sulfurous iron ore decomposer after the reduction reaction enters fluid-bed sweetening gypsum decomposer through high temperature non-mechanical valve, desulfurated plaster is sent into fluid-bed sweetening gypsum decomposer through the desulfurated plaster drying with feeding device simultaneously, carries out reduction reaction with the solid materials Fe, the CaS that are sent into by high temperature non-mechanical valve and generates Fe, lime CaO and SO
2Reaction product is separated through cyclonic separator, and wherein gaseous product is through CO
2/ SO
2Cooling is produced sulfuric acid with the system sulfuric acid apparatus, and is stored in sulphuric acid tank, CO
2Compressed machine is stored in CO
2Storage tank; Solid mixt after the separation passes through direct-reduced iron Fe and the CaO that ash cooling device and magnetic separating device obtain respectively, is stored in respectively in iron storage warehouse and the CaO storage tank, and the portion C aO in the CaO storage tank is recycled to fluidized-bed sulfurous iron ore decomposer.
Further improvement as system of the present invention, between described flue gas condensing device air outlet and fluid-bed sweetening gypsum decomposer inlet, be provided with low heat value CO burner, cooled smoke or process pipe-line transportation are to low heat value CO burner combustion, as the supplemental heat source of fluid-bed sweetening gypsum decomposer.
As the further improvement of system of the present invention, between described flue gas condensing device inlet mouth and hot precipitator, be provided with the CO burning device, the flue gas that enters the flue gas condensing device is stored in CO in advance again after the burning fully of CO burning device
2In the storage tank.
As the further improvement of system of the present invention, described CO
2The heat-eliminating medium inlet of the outlet of storage tank and described flue gas condensing device is connected CO
2CO in the storage tank
2Heat-eliminating medium as described flue gas condensing device.
As the further improvement of system of the present invention, described CO
2The outlet of storage tank also is connected described CO through piping, booster fan and fluidized-bed sulfurous iron ore decomposer, fluid-bed sweetening gypsum decomposer with the ash cooling device inlet mouth
2CO in the storage tank
2Through behind the pipe pressurizing as the fluidisation power of fluidized-bed sulfurous iron ore decomposer, fluid-bed sweetening gypsum decomposer and ash cooling device.
Characteristics of the present invention:
1) utilized the coal power station existing resource, not only comprehensive treating process desulfurated plaster and sulfurous iron ore waste, and reclaimed resources such as sulphur, iron and calcium, realized the comprehensive utilization of useless resource admittedly;
2) use coal, particularly low-grade coal as reductive agent, the power station resource is utilized effectively, the while also provides an approach for the comprehensive utilization of low-grade coal resource;
3) rate of decomposition of desulfurated plaster 〉=95%, desulfurization degree 〉=90%; The Fe rate of recovery 〉=90%;
4) this method is based on fluidization technology, and integrated solid catalysis technology, has characteristics simple in structure, that the operation temperature is low, the treatment time short, operation is stable, energy consumption is low, treatment capacity is big;
5) system body adopts fluidized bed reaction, with CO
2As fluidized wind, realized CO
2Enrichment and concentrate, help CO
2Reduction of discharging and utilization.
5) applied range of the present invention is not only applicable to the comprehensive treating process of the desulfurated plaster that coal power station produces, and is applicable to that the desulfurized gesso of flue gas of industries such as ferrous metallurgy is handled and the comprehensive utilization of useless resource admittedly yet.
Description of drawings
The system architecture of Fig. 1 embodiment of the invention 1 and process flow diagram.
Embodiment
The invention will be further described below in conjunction with drawings and Examples.
Present embodiment is made up of fluidized-bed sulfurous iron ore decomposer, 2 reduction reaction decomposers of fluid-bed sweetening gypsum reaction unit and corresponding subsystem thereof.Fig. 1 has provided the system architecture and the process flow diagram of present embodiment.
Be stored in Pulverized Coal Bin 2 behind coal process coal pulverizer 1 grinding, by feeding device 201 coal dust sent into fluidized-bed sulfurous iron ore decomposer 5 again; FeS
2Through being stored in the sulfurous iron ore storehouse 4 behind troilite powder grinding machine 3 grindings, pass through feeding device 401 again with FeS
2Powder is sent into fluidized-bed sulfurous iron ore decomposer 5.The air compartment place is provided with startup combustion chamber 6 (being used for the startup of fluidized-bed), high temperature non-mechanical valve 7 (being used to carry high-temp solid material) and slag discharging device 8 (being used to discharge the solid lime-ash) respectively in fluidized-bed sulfurous iron ore decomposer bottom.Coal, FeS
2, and in fluidized-bed sulfurous iron ore decomposer 5, carry out reduction reaction from the CaO of CaO storage tank 30, its temperature of reaction is controlled at 650-950 ℃.Gaseous product (CO, CO that reaction produces
2, S) (its heat-eliminating medium is from CO through hot precipitator 9, CO burning device and flue gas condensing device 10
2CO in the storage tank 13
2) cooling back recovery elemental sulfur, be stored in the sulphur storage warehouse 11; Cooled smoke or process pipe-line transportation are to 21 burnings of low heat value CO burner, and be as the supplemental heat source of fluid-bed sweetening gypsum decomposer 20, perhaps complete after compressor 12 is stored in CO in 16 burnings of CO burning device in advance
2In the storage tank 13; Solid materials after the reduction reaction enters fluid-bed sweetening gypsum decomposer 20 through high temperature non-mechanical valve 7.
Breaking away from gypsum and send into fluid-bed sweetening gypsum decomposer 20 with feeding device 19 through desulfurated plaster is dry, is to carry out reduction reaction under 800-1050 ℃ the condition to generate Fe, lime CaO and SO in temperature with the solid materials Fe, the CaS that are sent into by high temperature non-mechanical valve 7
2Reaction product is separated through cyclonic separator 22, and wherein gaseous product is through CO
2/ SO
2Cooling is produced sulfuric acid with system sulfuric acid apparatus 23, and is stored in sulphuric acid tank 24, CO
2Compressed machine 28 is stored in CO
2Storage tank 13; Solid mixt after the separation passes through direct-reduced iron Fe and the CaO that ash cooling device 25 and magnetic separating device 26 obtain respectively, be stored in respectively in iron storage warehouse 27 and the CaO storage tank 30, portion C aO in the CaO storage tank is recycled to fluidized-bed sulfurous iron ore decomposer 5, and remaining can return that desulphurization system recycles or use as the auxiliary material of iron and steel enterprise.
The CO of native system
2Storage tank 13 is born and is accepted and transmission ﹠ distribution CO
2Task, at first derive from fluidized-bed sulfurous iron ore decomposer 5 and fluid-bed sweetening gypsum decomposer 20 and be stored in CO through overdraft
2In the storage tank 13; CO in the storage tank
2A part is delivered to fluidized-bed sulfurous iron ore decomposer 5, fluid-bed sweetening gypsum decomposer 20 and ash cooling device 25 as fluidisation power respectively through booster fan 18, another part as heat-eliminating medium after condensing works 10 heating, as the siccative of dry desulfurated plaster enter desulfurated plaster dry with feeding device 19.
The present invention can also have other embodiment, and the technical scheme that equal replacement of all employings or equivalent transformation form all drops within the scope of protection of present invention.
Claims (9)
1. utilize the method for coal comprehensively treatment of pyrite and desulfurated plaster, it is characterized in that, this method comprises the following steps:
1) mine tailing of power station pulverized coal preparation system discards and mining engineering is collected and sorting, obtained sulfurous iron ore FeS
2Solid waste;
2) with FeS
2, to send into temperature be to carry out decomposition reaction in 650～950 ℃ the fluidized-bed sulfurous iron ore decomposer for CaO and coal, directly reduced Fe, CaS, sulphur steam and CO; The gas that contains sulphur steam and CO reclaims elemental sulfur by condensing works, the CO that the CO burning generates
2Be stored in the storage tank, directly reduce Fe and CaS then to enter fluid-bed sweetening gypsum decomposer by high temperature non-mechanical valve;
3) sending into temperature through the exsiccant desulfurated plaster is 800-1050 ℃ of fluid-bed sweetening gypsum decomposer; In this device, CaS and CaSO
4Reaction generates lime CaO and SO
2, contain CO
2And SO
2After the gas process is separated, SO
2Be used to produce sulfuric acid, CO
2Be stored in CO through compressor
2In the storage tank; The solid materials that contains Fe, CaO is after overcooling, isolate direct reduction Fe wherein, CaO then enters the warehouse jar, and portion C aO is transported to fluidized-bed sulfurous iron ore decomposer, returns after all the other CaO reclaim that desulphurization system recycles or uses as the auxiliary material of iron and steel enterprise.
2. the method for utilizing coal comprehensively treatment of pyrite and desulfurated plaster according to claim 1 is characterized in that, described step 2) in the CO that generates of CO burning
2, as the supplemental heat source of fluid-bed sweetening gypsum decomposer.
3. the method for utilizing coal comprehensively treatment of pyrite and desulfurated plaster according to claim 1 is characterized in that, described CO
2CO in the storage tank
2Through behind the pipe pressurizing as the fluidisation power of fluidized-bed sulfurous iron ore decomposer, fluid-bed sweetening gypsum decomposer and ash cooling device.
4. the method for utilizing coal comprehensively treatment of pyrite and desulfurated plaster according to claim 1 is characterized in that, described CO
2CO in the storage tank
2A part as heat-eliminating medium after condensing works heating, as the siccative of dry desulfurated plaster.
5. utilize the system of coal comprehensively treatment of pyrite and desulfurated plaster, form by fluidized-bed sulfurous iron ore decomposer, fluid-bed sweetening gypsum reaction unit and corresponding subsystem thereof, mainly comprise fluidized-bed sulfurous iron ore decomposer, fluid-bed sweetening gypsum reaction unit, sulfurous iron ore feeding device, coal feeding device, CO quickly cooling device, high temperature non-mechanical valve, desulfurated plaster drying and feeding device, ash cooling device, Fe and CaO collection and sorting unit, CaO material-returning device, start combustion chamber, CO combustion unit, CO
2/ SO
2Cooling and tripping device, CO
2Storage tank, SO
2System sulfuric acid apparatus, blower fan and pipeline; Be stored in Pulverized Coal Bin behind the coal process coal pulverizer grinding, by feeding device coal dust sent into fluidized-bed sulfurous iron ore decomposer again; FeS
2Through being stored in the sulfurous iron ore storehouse behind the troilite powder grinding machine grinding, again by feeding device with FeS
2Powder is sent into fluidized-bed sulfurous iron ore decomposer; The air compartment place is provided with startup combustion chamber, high temperature non-mechanical valve and slag discharging device respectively in fluidized-bed sulfurous iron ore decomposer bottom; Coal, FeS
2, and in fluidized-bed sulfurous iron ore decomposer, carry out reduction reaction from the CaO of CaO storage tank, the gaseous product that reaction produces is after hot precipitator, CO burning device and the cooling of flue gas condensing device, the elemental sulfur of recovery is stored in the sulphur storage warehouse; The compressed machine of cooled smoke is stored in CO
2In the storage tank; Solid materials in the fluidized-bed sulfurous iron ore decomposer after the reduction reaction enters fluid-bed sweetening gypsum decomposer through high temperature non-mechanical valve, desulfurated plaster is sent into fluid-bed sweetening gypsum decomposer through the desulfurated plaster drying with feeding device simultaneously, carries out reduction reaction with the solid materials Fe, the CaS that are sent into by high temperature non-mechanical valve and generates Fe, lime CaO and SO
2Reaction product is separated through cyclonic separator, and wherein gaseous product is through CO
2/ SO
2Cooling is produced sulfuric acid with the system sulfuric acid apparatus, and is stored in sulphuric acid tank, CO
2Compressed machine is stored in CO
2Storage tank; Solid mixt after the separation passes through direct-reduced iron Fe and the CaO that ash cooling device and magnetic separating device obtain respectively, is stored in respectively in iron storage warehouse and the CaO storage tank, and the portion C aO in the CaO storage tank is recycled to fluidized-bed sulfurous iron ore decomposer.
6. the system that utilizes coal comprehensively treatment of pyrite and desulfurated plaster according to claim 5, it is characterized in that, between described flue gas condensing device air outlet and fluid-bed sweetening gypsum decomposer inlet, be provided with low heat value CO burner, cooled smoke or process pipe-line transportation are to low heat value CO burner combustion, as the supplemental heat source of fluid-bed sweetening gypsum decomposer.
7. the system that utilizes coal comprehensively treatment of pyrite and desulfurated plaster according to claim 5, it is characterized in that, be provided with the CO burning device between described flue gas condensing device inlet mouth and hot precipitator, the flue gas that enters the flue gas condensing device is stored in CO in advance again after the burning fully of CO burning device
2In the storage tank.
8. the system that utilizes coal comprehensively treatment of pyrite and desulfurated plaster according to claim 5 is characterized in that, described CO
2The heat-eliminating medium inlet of the outlet of storage tank and described flue gas condensing device is connected CO
2CO in the storage tank
2Heat-eliminating medium as described flue gas condensing device.
9. the system that utilizes coal comprehensively treatment of pyrite and desulfurated plaster according to claim 5 is characterized in that, described CO
2The outlet of storage tank also is connected described CO through piping, booster fan and fluidized-bed sulfurous iron ore decomposer, fluid-bed sweetening gypsum decomposer with the ash cooling device inlet mouth
2CO in the storage tank
2Through behind the pipe pressurizing as the fluidisation power of fluidized-bed sulfurous iron ore decomposer, fluid-bed sweetening gypsum decomposer and ash cooling device.
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|---|---|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303883A (en) * | 2011-07-11 | 2012-01-04 | 中国石油化工集团公司 | Method for preparing calcium oxide and sulfur by double-atmosphere fluidized roasting of desulfurated gypsum |
| CN106435163A (en) * | 2016-11-22 | 2017-02-22 | 江苏省冶金设计院有限公司 | System and method for treating pyrite by grinding-magnetic separation |
| CN109809456A (en) * | 2019-03-13 | 2019-05-28 | 山东大学 | A kind of system and method for coal gasification collaboration gypsum calcining coproduction calcium oxide and sulphur |
| CN111302312A (en) * | 2020-02-28 | 2020-06-19 | 山东大学 | Process and system for resource utilization of gypsum and pyrite |
| CN113023684A (en) * | 2021-03-09 | 2021-06-25 | 山东大学 | System and method for preparing sulfur by catalytic reduction of high-sulfur flue gas by using carbon/iron sulfide |
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| CN101570341A (en) * | 2009-05-26 | 2009-11-04 | 华中科技大学 | Method for utilizing comprehensive resource of sulfur-containing solid waste |
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| US4111755A (en) * | 1975-10-30 | 1978-09-05 | Mcdowell-Wellman Engineering Company | Method of producing pelletized fixed sulfur fuel |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303883A (en) * | 2011-07-11 | 2012-01-04 | 中国石油化工集团公司 | Method for preparing calcium oxide and sulfur by double-atmosphere fluidized roasting of desulfurated gypsum |
| CN102303883B (en) * | 2011-07-11 | 2013-05-01 | 中国石油化工集团公司 | Method for preparing calcium oxide and sulfur by double-atmosphere fluidized roasting of desulfurated gypsum |
| CN106435163A (en) * | 2016-11-22 | 2017-02-22 | 江苏省冶金设计院有限公司 | System and method for treating pyrite by grinding-magnetic separation |
| CN109809456A (en) * | 2019-03-13 | 2019-05-28 | 山东大学 | A kind of system and method for coal gasification collaboration gypsum calcining coproduction calcium oxide and sulphur |
| CN109809456B (en) * | 2019-03-13 | 2021-02-26 | 山东大学 | System and method for co-producing calcium oxide and sulfur by coal gasification and gypsum calcination |
| CN111302312A (en) * | 2020-02-28 | 2020-06-19 | 山东大学 | Process and system for resource utilization of gypsum and pyrite |
| CN111302312B (en) * | 2020-02-28 | 2021-11-16 | 山东大学 | Process and system for resource utilization of gypsum and pyrite |
| CN113023684A (en) * | 2021-03-09 | 2021-06-25 | 山东大学 | System and method for preparing sulfur by catalytic reduction of high-sulfur flue gas by using carbon/iron sulfide |
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Application publication date: 20101027 |