CN103964396A - Method for recovering sulfur from sulfur-containing leaching residue - Google Patents
Method for recovering sulfur from sulfur-containing leaching residue Download PDFInfo
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Abstract
The invention provides a method for recovering sulfur from a sulfur-containing leaching residue. The method comprises the following steps: the sulfur-containing leaching residue is heated up to 400 DEG C to 500 DEG C in a nitrogenous atmosphere under the negative-pressure condition to obtain a compound containing sulfur steam and the remaining solid slag; a first cooling and separation is performed on the compound containing sulfur steam to obtain molten sulfur and the remaining gas mixture. With the adoption of the method provided by the invention, sulfur in the sulfur-containing leaching residue can be rapidly and effectively recycled, the method is easy to operate, the sulfur recovery efficiency is high, contamination to the environment is reduced, both the operating load and the maintenance rate of equipment are low, the content of elemental sulfur in the leaching residue is not requested, the range of application is wide, and the realization of industrialization is facilitated.
Description
Technical field
The present invention relates to chemical field, particularly, relate to the method that reclaims sulphur from sulfur-bearing leached mud.
Background technology
Oxygen is pressed in Leaching Zinc concentrate technique, and the elemental sulfur in zinc ore concentrate enters in leached mud with solid-state form, and elemental sulfur content can be up to 80% left and right.Elemental sulfur in leached mud is reclaimed, not only can create economic benefit, and can reduce the pollution to environment, realize Sustainable development.Research to leached mud recovery sulphur technique both at home and abroad, experiment are accompanied by zinc sulfide concentrates high pressure extract technology and start together.Bright Cotterell zinc factory of section of Canada is in 1981 the earliest by the industrialization of leached mud recovery sulphur technique, and the method for employing is hot filter method.Hudzon Ba Yi mining and metallurgy zinc factory of company of Canada hot filter method sulfur recovery system was also gone into operation in 1993.
The technical process of hot filter method is as follows: after the leaching pulp dewatering from flotation workshop, deliver to sulfur melting groove steam indirect heating to more than sulphur fusing point, then filter through molten sulfur strainer, after filtering, clean Molten sulphur is produced solid sulfur through granulating system.Domestic employing oxygen presses the example of leaching processing zinc ore concentrate few, and is operation recent years, construction, all adopts hot filter method in the zinc factory of going into operation, building.But the method has following several shortcoming: (1) maintenance of equipment rate is high: due to leached mud impure many (approximately 20%), molten sulfur filter operation load is large, faults frequent; (2) sulfur recovery rate is low: in the outer heat extraction filter residue of molten sulfur strainer, containing the sulphur of 50% left and right, affect the rate of recovery of sulphur, in leached mud, impurity is more, and the rate of recovery of sulphur is lower; (3) operating environment is poor: when molten sulphur process and molten sulfur strainer slag dumping, have a large amount of sulphur steam to overflow, operational condition is severe, and workman's operational load is large, and environmental pollution is also more serious; (4) narrow application range: the method requires in leached mud elemental sulfur content more than 70%, otherwise leached mud cannot form molten state, can not carry out follow-up molten sulfur and filter, narrow application range is higher to smelting technology and operational requirement.
Thereby, still have much room for improvement about the technique that reclaims sulphur from sulfur-bearing leached mud.
Summary of the invention
The present invention is intended at least solve one of technical problem existing in prior art.For this reason, one object of the present invention is to propose that a kind of sulfur recovery rate is high, and environmental pollution is little, and operational load is little, and maintenance rate is low, and to not requirement of elemental sulfur content in leached mud, the applied widely method that reclaims sulphur from sulfur-bearing leached mud.
In one aspect of the invention, the invention provides a kind of method that reclaims sulphur from sulfur-bearing leached mud.According to embodiments of the invention, the method comprises the following steps: in nitrogen atmosphere, under condition of negative pressure, described sulfur-bearing leached mud is heated to 400-500 degree Celsius, to obtain sulfur-bearing vapour mixture and remaining solid slag; And described sulfur-bearing vapour mixture is carried out to the first refrigerated separation, to obtain Molten sulphur and residual gas mixture.Contriver finds, utilize the method for the present invention, can fast and effeciently reclaim the sulphur in sulfur-bearing leached mud, and the method is simple to operate, sulfur recovery rate is high, environmental pollution is little, operational load is little, and maintenance of equipment rate is low, and to not requirement of elemental sulfur content in leached mud, applied widely, be easy to realize industrialization.
According to the method that reclaims sulphur from sulfur-bearing leached mud of the embodiment of the present invention, can also there is following additional technical feature:
According to embodiments of the invention, described sulfur-bearing leached mud is that oxygen presses Leaching Zinc to smelt leached mud.Thus, can reclaim elemental sulfur in leached mud, not only can create economic benefit, and can reduce the pollution to environment, realize Sustainable development.
According to embodiments of the invention, before carrying out described heat treated, further comprise: described sulfur-bearing leached mud is carried out to filtration treatment.Thus, can effectively reduce the water-content in leached mud, and then greatly reduce the energy consumption of follow-up sublimation step.
According to embodiments of the invention, described filtration treatment adopts vertical filter to carry out.Thus, can effectively reduce the water-content in sulfur-bearing leached mud, obtain the lower sulfur-bearing leached mud of water content.
According to embodiments of the invention, in described sulfur-bearing leached mud, solid content is 25%, through moisture lower than 15% in the sulfur-bearing leached mud of filtration treatment.Thus, can effectively reduce the energy consumption in follow-up sublimation step.
According to embodiments of the invention, described heat treated adopts fluidizing furnace to carry out, and described fluidizing furnace comprises: body of heater, is limited with reaction compartment in described body of heater; Opening for feed, described opening for feed is arranged at described sidewall of the furnace body below, for providing and state sulfur-bearing leached mud to described body of heater; Inlet mouth, described inlet mouth is arranged at described bottom of furnace body, to form described nitrogen atmosphere, and discharges described remaining solid slag for supplying nitrogen in described body of heater; Discharge port, described discharge port is arranged at described sidewall of the furnace body top, for discharging described sulfur-bearing vapour mixture.Contriver finds, utilizes above-mentioned fluidizing furnace by distillation, sulphur simple substance to be separated from sulfur-bearing leached mud fast and effectively.In addition, this fluidizing furnace working pressure is negative pressure, and adopts nitrogen protection, can effectively prevent that sulphur is by airborne dioxygen oxidation.
According to embodiments of the invention, described fluidizing furnace further comprises at least one heating tube, and described heating tube is arranged in described body of heater, for making the temperature in described body of heater remain 400-500 degree Celsius.Thus, can effectively make sulphur distil out from leached mud, ensure that the vapor partial pressure of sulphur is higher simultaneously, can discharge from fluidizing furnace top, enter cleaning apparatus.
According to embodiments of the invention, before carrying out described the first refrigerated separation, further comprise: described sulfur-bearing vapour mixture is carried out to dust removal process.Thus, can effectively remove the impurity such as dust in sulphur steam, obtain the higher sulfur product of purity.
According to embodiments of the invention, described dust removal process adopts Ceramic dust collector to carry out.Thus, dust removing effects is better.
According to embodiments of the invention, at the temperature of 360-450 degree Celsius, carry out described dust removal process.Thus, can avoid sulphur vapor condensation to become Molten sulphur, cause equipment, line clogging.
According to embodiments of the invention, utilize the first cooling separator to carry out described the first refrigerated separation, described the first cooling separator has first end and the second end, the line of described first end and the second end and horizontal plane form angle α, wherein α is greater than 0 ° and be less than 30 °, and described first end is higher than described the second end, and described the first cooling separator comprises: inner tube, and described inner tube is used for the water coolant that circulates; Outer tube, forms cooling space between described outer tube and described inner tube, the described cooling space described sulfur-bearing vapour mixture that is used for circulating; Cooling water inlet, described cooling water inlet is arranged at described outer tube bottom, and contiguous described the second end, is connected, for providing described water coolant to described inner tube with described inner tube; Cooling water outlet, described cooling water outlet is arranged at described outer tube bottom, and contiguous described the second end, is connected, for discharging described water coolant with described inner tube; Combi inlet port, described combi inlet port is arranged at described outer tube top, and contiguous described the second end, is connected, for described sulfur-bearing vapour mixture is provided to described cooling space with described cooling space; Molten sulphur outlet, described Molten sulphur outlet is arranged at described outer tube bottom, and contiguous described the second end, is connected, for discharging described Molten sulphur with described cooling space; And residual gas mixture outlet, described residual gas mixture outlet is arranged at described first end, be connected with described cooling space, be used for discharging described residual gas mixture, wherein, described cooling water inlet and described Molten sulphur outlet interval arrange, and described cooling water outlet and described combi inlet port interval arrange.Thus, can be effectively Molten sulphur by high temperature sulphur vapor condensation, and due to the first end of cooling separator and the line of the second end and horizontal plane formation certain angle, the Molten sulphur of cooling acquisition can be by pipeline self to cooling separator bottom.
According to embodiments of the invention, further comprise described residual gas mixture is carried out to the second refrigerated separation, obtain nitrogen to remove water vapor, wherein said the second refrigerated separation adopts the second cooling separator to carry out, and described the second cooling separator has identical structure with described the first cooling separator.Thus, can effectively remove the water vapour in nitrogen, thereby nitrogen is carried out to recycle, and then effectively reduce energy consumption, minimizing cost, and water of condensation can be by pipeline self to sewage collecting tank.
According to embodiments of the invention, described water coolant is feedwater or de-mineralized water.Thus, fully recovery waste heat, improves the heat utilization efficiency of whole technique.
According to embodiments of the invention, the feedwater of discharging through described cooling water outlet is returned to boiler, the de-mineralized water of discharging through described cooling water outlet is returned to deoxygenator.Thus, can realize the recycle of feedwater and de-mineralized water, effectively reduce energy consumption, save cost.
According to embodiments of the invention, described remaining solid slag is carried out cooling and delivers to smelting shop, to reclaim valuable metal.Thus, in by valuable metal recovery recycling, can avoid environmental pollution.
According to embodiments of the invention, by granulating system, described Molten sulphur is prepared as to solid sulfur.Thus, can effectively will reclaim the sulphur obtaining for industrial production.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Brief description of the drawings
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination is understood becoming the description of embodiment obviously and easily, wherein:
Fig. 1 has shown according to one embodiment of present invention, reclaims the structural representation of the system of sulphur from sulfur-bearing leached mud.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
In one aspect of the invention, the invention provides a kind of method that reclaims sulphur from sulfur-bearing leached mud.According to embodiments of the invention, the method comprises the following steps:
Heat treated
In nitrogen atmosphere, under condition of negative pressure, described sulfur-bearing leached mud is heated to 400-500 degree Celsius, after the element sulphur distillation in leached mud, mix and separate with solid slag with nitrogen, to obtain sulfur-bearing vapour mixture and remaining solid slag.Thus, can effectively the sulphur in sulfur-bearing leached mud be passed through to sublimation separation out, thus effective recycling.
According to embodiments of the invention, described sulfur-bearing leached mud is that oxygen presses Leaching Zinc to smelt leached mud.Thus, can reclaim elemental sulfur in leached mud, not only can create economic benefit, and can reduce the pollution to environment, realize Sustainable development.
According to embodiments of the invention, before sulfur-bearing leached mud is carried out to heat treated, can carry out filtration treatment to the higher sulfur-bearing leached mud of water content in advance.Thus, can effectively reduce the water-content in leached mud, and then greatly reduce the energy consumption of follow-up heat treatment step.
According to embodiments of the invention, the mode of described filtration treatment is not particularly limited, and those skilled in the art can select flexibly according to practical situation.According to a concrete example of the present invention, described filtration treatment adopts vertical filter to carry out.Thus, can effectively reduce the water-content in sulfur-bearing leached mud, obtain the lower sulfur-bearing leached mud of water content.
According to embodiments of the invention, in described sulfur-bearing leached mud, solid content is 25%, through moisture lower than 15% in the sulfur-bearing leached mud of filtration treatment.Thus, can effectively reduce the energy consumption in follow-up heat treatment step.
According to embodiments of the invention, described heat treated adopts fluidizing furnace to carry out, and described fluidizing furnace comprises: body of heater, is limited with reaction compartment in described body of heater; Opening for feed, described opening for feed is arranged at described sidewall of the furnace body below, for providing and state sulfur-bearing leached mud to described body of heater; Inlet mouth, described inlet mouth is arranged at described bottom of furnace body, to form described nitrogen atmosphere, and discharges described remaining solid slag for supplying nitrogen in described body of heater; Discharge port, described discharge port is arranged at described sidewall of the furnace body top, for discharging described sulfur-bearing vapour mixture.Contriver finds, utilizes above-mentioned fluidizing furnace by distillation, sulphur simple substance to be separated from sulfur-bearing leached mud fast and effectively.In addition, this fluidizing furnace working pressure is negative pressure, and adopts nitrogen protection, can effectively prevent that sulphur is by airborne dioxygen oxidation.
According to embodiments of the invention, described fluidizing furnace further comprises at least one heating tube, and described heating tube is arranged in described body of heater, for making the temperature in described body of heater remain 400-500 degree Celsius.Thus, can effectively make sulphur distil out from leached mud, ensure that the vapor partial pressure of sulphur is higher simultaneously, can discharge from fluidizing furnace top, enter cleaning apparatus.
According to embodiments of the invention, described remaining solid slag is carried out cooling and delivers to smelting shop, to reclaim valuable metal.Thus, in by valuable metal recovery recycling, can avoid environmental pollution.
The first refrigerated separation
Then, described sulfur-bearing vapour mixture is carried out to the first refrigerated separation, to obtain Molten sulphur and residual gas mixture.
According to embodiments of the invention, before carrying out described the first refrigerated separation, further comprise: described sulfur-bearing vapour mixture is carried out to dust removal process.Thus, can effectively remove the impurity such as dust in sulphur steam, obtain the higher sulfur product of purity.
According to embodiments of the invention, the device of described dust removal process is selected high temperature resistant dust collector.According to a concrete example of the present invention, described dust removal process adopts Ceramic dust collector to carry out.Thus, dust removing effects is better.
According to embodiments of the invention, at the temperature of 360-450 degree Celsius, carry out described dust removal process.Thus, can avoid sulphur vapor condensation to become Molten sulphur, cause equipment, line clogging.
According to embodiments of the invention, utilize the first cooling separator to carry out described the first refrigerated separation, described the first cooling separator has first end and the second end, the line of described first end and the second end and horizontal plane form angle α, wherein α is greater than 0 ° and be less than 30 °, and described first end is higher than described the second end, and described the first cooling separator comprises: inner tube, and described inner tube is used for the water coolant that circulates; Outer tube, forms cooling space between described outer tube and described inner tube, the described cooling space described sulfur-bearing vapour mixture that is used for circulating; Cooling water inlet, described cooling water inlet is arranged at described outer tube bottom, and contiguous described the second end, is connected, for providing described water coolant to described inner tube with described inner tube; Cooling water outlet, described cooling water outlet is arranged at described outer tube top, and contiguous described the second end, is connected, for discharging described water coolant with described inner tube; Combi inlet port, described combi inlet port is arranged at described outer tube top, and contiguous described the second end, is connected, for described sulfur-bearing vapour mixture is provided to described cooling space with described cooling space; Molten sulphur outlet, described Molten sulphur outlet is arranged at described outer tube bottom, and contiguous described the second end, is connected, for discharging described Molten sulphur with described cooling space; And residual gas mixture outlet, described residual gas mixture outlet is arranged at described first end, be connected with described cooling space, be used for discharging described residual gas mixture, wherein, described cooling water inlet and described Molten sulphur outlet interval arrange, and described cooling water outlet and described combi inlet port interval arrange.Thus, can be effectively Molten sulphur by high temperature sulphur vapor condensation, and due to the first end of cooling separator and the line of the second end and horizontal plane formation certain angle, the Molten sulphur of cooling acquisition can be by pipeline self to cooling separator bottom.
According to embodiments of the invention, by granulating system, described Molten sulphur is prepared as to solid sulfur.Thus, can effectively will reclaim the sulphur obtaining for industrial production.
According to embodiments of the invention, further comprise described residual gas mixture is carried out to the second refrigerated separation, obtain nitrogen to remove water vapor, wherein said the second refrigerated separation adopts the second cooling separator to carry out, and described the second cooling separator has identical structure with described the first cooling separator.Thus, can effectively remove the water vapour in nitrogen, thereby nitrogen is carried out to recycle, and then effectively reduce energy consumption, minimizing cost, and water of condensation can be by pipeline self to sewage collecting tank.
According to embodiments of the invention, described water coolant is feedwater or de-mineralized water.Thus, fully recovery waste heat, improves the heat utilization efficiency of whole technique.
According to embodiments of the invention, the feedwater of discharging through described cooling water outlet is returned to boiler, the de-mineralized water of discharging through described cooling water outlet is returned to deoxygenator.Thus, can realize the recycle of feedwater and de-mineralized water, effectively reduce energy consumption, save cost.
Contriver finds, utilize the method for the present invention, can fast and effeciently reclaim the sulphur in sulfur-bearing leached mud, and the method is simple to operate, sulfur recovery rate is high, environmental pollution is little, operational load is little, and maintenance of equipment rate is low, and to not requirement of elemental sulfur content in leached mud, applied widely, be easy to realize industrialization.
The method that reclaims sulphur from sulfur-bearing leached mud for a better understanding of the present invention, the present invention also provides the system that reclaims sulphur from sulfur-bearing leached mud:
In another aspect of the present invention, the invention provides a kind of system 1000 that reclaims sulphur from sulfur-bearing leached mud.According to embodiments of the invention, with reference to Fig. 1, this system 1000 comprises: heat treatment apparatus 100, described heat treatment apparatus 100 is in nitrogen atmosphere, under condition of negative pressure, described sulfur-bearing leached mud is heated to 400-500 degree Celsius, to obtain sulfur-bearing vapour mixture and remaining solid slag; And the first refrigerated separation device 200, described the first refrigerated separation device 200 is connected with described heat treatment apparatus 100, for described sulfur-bearing vapour mixture is carried out to the first refrigerated separation, to obtain Molten sulphur and residual gas mixture.Contriver finds, utilize this system of the present invention, the method that can pass through directly distillation is fast and effectively by the sulphur Separation and Recovery in sulfur-bearing leached mud, and sulfur recovery rate is high, environmental pollution is little, and operational load is little, maintenance of equipment rate is low, and to not requirement of elemental sulfur content in leached mud, applied widely, be easy to realize industrialization.
According to embodiments of the invention, described sulfur-bearing leached mud is that oxygen presses Leaching Zinc to smelt leached mud.Thus, can reclaim elemental sulfur in leached mud, not only can create economic benefit, and can reduce the pollution to environment, realize Sustainable development.
According to embodiments of the invention, further comprise filtration treatment device 300, described filtration treatment device 300 is connected with described heat treatment apparatus 100, for before carrying out described heat treated, described sulfur-bearing leached mud is carried out to filtration treatment.Thus, can effectively reduce the water-content in sulfur-bearing leached mud, and then greatly reduce the energy consumption of heat treatment apparatus.
According to embodiments of the invention, described filtration treatment device 300 is vertical filter.Thus, can effectively reduce the water-content in sulfur-bearing leached mud, obtain the lower sulfur-bearing leached mud of water content.
According to embodiments of the invention, in described sulfur-bearing leached mud, solid content is 25%, through moisture lower than 15% in the sulfur-bearing leached mud of filtration treatment.Thus, can greatly reduce the energy consumption of heat treatment apparatus.
According to embodiments of the invention, described heat treatment apparatus 100 is fluidizing furnace, and described fluidizing furnace comprises: body of heater 101, is limited with reaction compartment (not shown) in described body of heater 101; Opening for feed 102, described opening for feed 102 is arranged at described body of heater 101 sidewall belows, for providing described sulfur-bearing leached mud to described body of heater 101; Inlet mouth 103, described inlet mouth 103 is arranged at described body of heater 101 bottoms, for to the interior supplying nitrogen of described body of heater 101 to form described nitrogen atmosphere, and discharges described remaining solid slag; Discharge port 104, described discharge port 104 is arranged at described body of heater 101 sidewall tops, for discharging described sulfur-bearing vapour mixture.Contriver finds, utilizes above-mentioned fluidizing furnace by distillation, sulphur simple substance to be separated from sulfur-bearing leached mud fast and effectively.In addition, this fluidizing furnace working pressure is negative pressure, and adopts nitrogen protection, can effectively prevent that sulphur is by airborne dioxygen oxidation.
According to embodiments of the invention, described fluidizing furnace further comprises at least one heating tube (not shown), and described heating tube is arranged in described body of heater 101, for making the temperature in described body of heater 101 remain 400-500 degree Celsius.Thus, can effectively make sulphur distil out from leached mud, ensure that the vapor partial pressure of sulphur is higher simultaneously, can discharge from fluidizing furnace top, enter cleaning apparatus.
According to embodiments of the invention, it is 400 degrees Celsius by the interior temperature of described heat treatment apparatus 100.Thus, can either ensure that sulphur effectively distils, can reduce again energy consumption, reduce costs.
According to embodiments of the invention, further comprise dedusting treater 400, described dedusting treater 400 is connected with described the first refrigerated separation device 200 with described heat treatment apparatus 100 respectively, for before carrying out described the first refrigerated separation, described sulfur-bearing vapour mixture is carried out to dust removal process.Thus, can effectively remove the impurity such as dust in sulphur steam, obtain the higher sulfur product of purity.
According to embodiments of the invention, described dedusting treater 400 is Ceramic dust collector.Thus, dust removing effects is better.
According to embodiments of the invention, the temperature in described Ceramic dust collector is 360-450 degree Celsius.Thus, can avoid sulphur vapor condensation to become Molten sulphur, cause equipment, line clogging.
According to embodiments of the invention, described the first refrigerated separation device 200 has first end and the second end, the line of described first end and the second end and horizontal plane form angle α, wherein α is greater than 0 ° and be less than 30 °, and described first end is higher than described the second end, described the first refrigerated separation device 200 comprises: inner tube (not shown), and described inner tube is used for the water coolant that circulates; Outer tube 206, forms cooling space (not shown) between described outer tube 206 and described inner tube, the described cooling space described sulfur-bearing vapour mixture that is used for circulating; Cooling water inlet 201, described cooling water inlet 201 is arranged at described outer tube 206 bottoms, and contiguous described the second end, is connected, for providing described water coolant to described inner tube with described inner tube; Cooling water outlet 202, described cooling water outlet 202 is arranged at described outer tube 206 tops, and contiguous described the second end, is connected, for discharging described water coolant with described inner tube; Combi inlet port 203, described combi inlet port 203 is arranged at described outer tube 206 tops, and contiguous described the second end, is connected, for described sulfur-bearing vapour mixture is provided to described cooling space with described cooling space; Molten sulphur outlet 204, described Molten sulphur outlet 204 is arranged at described outer tube 206 bottoms, and contiguous described the second end, is connected, for discharging described Molten sulphur with described cooling space; And residual gas mixture outlet 205, described residual gas mixture outlet 205 is arranged at described first end, be connected with described cooling space, be used for discharging described residual gas mixture, wherein, described cooling water inlet 201 exports 204 intervals with described Molten sulphur and arranges, and described cooling water outlet 202 arranges with described combi inlet port 203 intervals.Thus, can be effectively Molten sulphur by high temperature sulphur vapor condensation, and due to the first end of the first cooling separator and the line of the second end and horizontal plane formation certain angle, the Molten sulphur of cooling acquisition can be by pipeline self to cooling separator bottom.
According to embodiments of the invention, further comprise the second refrigerated separation device 500, described the second refrigerated separation device 500 is connected with described the first refrigerated separation device 200, and there is identical structure with described the first refrigerated separation device 200, for described residual gas mixture is carried out to the second refrigerated separation, obtain nitrogen to remove water vapor.Thus, can effectively remove the water vapour in nitrogen, thereby nitrogen is carried out to recycle, and then effectively reduce energy consumption, minimizing cost, and water of condensation can be by pipeline self to sewage collecting tank.
According to embodiments of the invention, described water coolant is feedwater or de-mineralized water.Thus, can realize the recycling of heat, effectively reduce energy consumption, save cost.
According to embodiments of the invention, further comprise water shoot (not shown), described water shoot is connected with described cooling water outlet 202, for the feedwater of discharging through described cooling water outlet 202 is returned to boiler, or the de-mineralized water of discharging through described cooling water outlet 202 is delivered to deoxygenator.Thus, can realize the recycle of feedwater and de-mineralized water, effectively reduce energy consumption, save cost.
According to embodiments of the invention, further comprise Residue extraction pipeline (not shown), described Residue extraction pipeline is connected with described heat treatment apparatus 100, for described remaining solid slag being carried out cooling and delivering to smelting shop, to reclaim valuable metal.Thus, in by valuable metal recovery recycling, can avoid environmental pollution.
According to embodiments of the invention, further comprise liquid sulphur conveying pipe road (not shown), described liquid sulphur conveying pipe road is connected and is connected with granulating system (not shown) with described the first refrigerated separation device 200 respectively, for described Molten sulphur is delivered to described granulating system, to described Molten sulphur is prepared as to solid sulfur.Thus, can effectively will reclaim the sulphur obtaining for industrial production.
Embodiment 1
Press solid content in Leaching Zinc smelting technology to be about 25% leached mud ore pulp oxygen and be delivered to vertical filter by ore pulp feeding pump, the impurity that filtration obtains etc. send smelting shop, the water content obtaining lower than 15% sulfur-bearing leached mud by constant feeder, be delivered in the reaction compartment of fluidizing furnace through opening for feed, in the reaction compartment of fluidizing furnace, under condition of negative pressure, sulfur-bearing leached mud is heated to 400-500 degree Celsius, simultaneously, by inlet mouth to supplying nitrogen in the reaction compartment of fluidizing furnace, and to heat by heating tube the temperature maintaining in reaction compartment be 400-500 degree Celsius, after element sulphur distillation in leached mud, mix and separate with solid slag with nitrogen, obtain thus sulfur-bearing vapour mixture and remaining solid slag, wherein, remaining solid slag is discharged reaction compartment by inlet mouth, carry smelting shop through Residue extraction pipeline, sulfur-bearing vapour mixture is discharged reaction compartment through discharge port, be transported to pyroceramic fly-ash separator, under 360-450 degree Celsius, carry out dust removal process, entered the cooling space of the first cooling separator by combi inlet port through the sulfur-bearing vapour mixture of dedusting, simultaneously, feedwater enters inner tube by cooling water inlet, make the condensation of sulfur-bearing vapour mixture by the heat exchange between water coolant and sulfur-bearing vapour mixture, to obtain Molten sulphur and residual gas mixture, the Molten sulphur obtaining is from the bottom that flow to cooling space, discharge cooling space by Molten sulphur outlet, be delivered to granulating system through liquid sulphur conveying pipe road and make solid sulfur, feedwater through heat exchange is discharged inner tube by cooling water outlet, be delivered to boiler systems, the residual gas mixture obtaining is discharged cooling space by residual gas mixture outlet, be transported to the cooling space of the second cooling separator, de-mineralized water enters inner tube by cooling water inlet simultaneously, make the water vapor condensation in residual gas mixture by the heat exchange between water coolant and residual gas mixture, so that acquisition nitrogen, the nitrogen obtaining is further transported to fluidizing furnace recycle, de-mineralized water through heat exchange is discharged inner tube by cooling water outlet, be delivered to deoxygenator.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of instructions such as " circumferentially " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of device or the element of instruction or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as instruction or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or integral; Can be mechanical connection, can be also electrical connection; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, First Characteristic Second Characteristic " on ", " top " and " above " but First Characteristic directly over Second Characteristic or oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " can be First Characteristic under Second Characteristic or tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
In the description of this specification sheets, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And specific features, structure, material or the feature of description can be with suitable mode combination in any one or more embodiment or example.
Although illustrated and described embodiments of the invention, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present invention and aim, can carry out multiple variation, amendment, replacement and modification to these embodiment, scope of the present invention is limited by claim and equivalent thereof.
Claims (9)
1. a method that reclaims sulphur from sulfur-bearing leached mud, is characterized in that, comprises the following steps:
In nitrogen atmosphere, under condition of negative pressure, described sulfur-bearing leached mud is heated to 400-500 degree Celsius, to obtain sulfur-bearing vapour mixture and remaining solid slag; And
Described sulfur-bearing vapour mixture is carried out to the first refrigerated separation, to obtain Molten sulphur and residual gas mixture.
2. method according to claim 1, is characterized in that, described sulfur-bearing leached mud is that oxygen presses Leaching Zinc to smelt leached mud.
3. method according to claim 1, is characterized in that, before carrying out described heat treated, further comprises:
Described sulfur-bearing leached mud is carried out to filtration treatment.
4. method according to claim 3, is characterized in that, through moisture lower than 15% in the sulfur-bearing leached mud of filtration treatment.
5. method according to claim 1, is characterized in that, described heat treated adopts fluidizing furnace to carry out.
6. method according to claim 1, is characterized in that, before carrying out described the first refrigerated separation, further comprises:
Described sulfur-bearing vapour mixture is carried out to dust removal process.
7. method according to claim 6, is characterized in that, described dust removal process adopts Ceramic dust collector to carry out.
8. method according to claim 7, is characterized in that, carries out described dust removal process at the temperature of 360-450 degree Celsius.
9. method according to claim 1, is characterized in that, further comprises described residual gas mixture is carried out to the second refrigerated separation, obtains nitrogen to remove water vapor.
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| CN107324287A (en) * | 2017-07-11 | 2017-11-07 | 四川理工学院 | A kind of high temperature steam desulfurization device |
| CN113086951A (en) * | 2021-03-24 | 2021-07-09 | 武汉科技大学 | Process for preparing high-purity sulfur by hot blowing desorption method |
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| CN103382021A (en) * | 2012-05-05 | 2013-11-06 | 康大平 | Production method of sulphur recovered by continuous distillation of sulfur slag, and apparatus thereof |
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| CN103382021A (en) * | 2012-05-05 | 2013-11-06 | 康大平 | Production method of sulphur recovered by continuous distillation of sulfur slag, and apparatus thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107324287A (en) * | 2017-07-11 | 2017-11-07 | 四川理工学院 | A kind of high temperature steam desulfurization device |
| CN107324287B (en) * | 2017-07-11 | 2019-05-14 | 四川理工学院 | A kind of high temperature steam desulfurization device |
| CN113086951A (en) * | 2021-03-24 | 2021-07-09 | 武汉科技大学 | Process for preparing high-purity sulfur by hot blowing desorption method |
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