CN112301213B - Manganese ore roasting rotary kiln system - Google Patents
Manganese ore roasting rotary kiln system Download PDFInfo
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- CN112301213B CN112301213B CN202011206835.4A CN202011206835A CN112301213B CN 112301213 B CN112301213 B CN 112301213B CN 202011206835 A CN202011206835 A CN 202011206835A CN 112301213 B CN112301213 B CN 112301213B
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- 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
- C22B1/02—Roasting processes
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- 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
- C22B47/00—Obtaining manganese
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D21/0014—Devices for monitoring temperature
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Abstract
The invention relates to a manganese ore roasting rotary kiln system, which comprises a batching system, a feeding system, a rotary kiln, a tail gas dust removal system and a gas burner, wherein the batching system comprises a batching belt scale, the batching belt scale is provided with a quality detection device, the feeding system comprises a disc feeder and a feeding chute, the tail gas dust removal system comprises a cooler, a cloth bag type dust remover, an induced draft fan and a chimney, the gas burner comprises a gas burner and a control valve group, the cooler is provided with a kiln discharge tail gas detection device, the kiln discharge tail gas detection device detects the content of various flue gases in kiln tail gas, the quality detection device detects the quality of manganese ore for batching, when the content of the flue gas in the kiln discharge tail gas exceeds a preset value, the roasting reaction in the rotary kiln is insufficient, the quality of the manganese ore in the rotary kiln is increased by adjusting the disc feeder and the feeding chute, so that the roasting reaction in the rotary kiln is more sufficient, thereby reducing the discharge of smoke, saving cost and resources and reducing environmental pollution.
Description
Technical Field
The invention relates to the technical field of manganese ore roasting, in particular to a manganese ore roasting rotary kiln system.
Background
Calcination refers to heat treatment in air or an inert gas stream at a certain temperature, also known as calcination. In the manganese ore roasting metallurgy process, roasting is carried out, so that the material is not only suitable for subsequent operation in terms of chemical properties, but also provides a proper physical state. The rotary kiln is a thermal equipment for heating and treating bulk or slurry materials by rotating a calcining kiln. The method is characterized in that: (1) low-speed heavy load; (2) the environmental temperature is high, the surface temperature of the rotary kiln cylinder is usually more than 200 ℃, and a large amount of heat is radiated to the periphery; (3) the environment has more dust, and the sealing belt of the rotary kiln, kiln dust conveying equipment and a kiln tail chimney all scatter dust to the periphery; (4) the damage degree of the kiln lining is different along with the different temperatures of each section zone, so that the damage of local refractory materials is easily caused; (5) powder is stacked in a sliding manner in the kiln, and partial particle materials are not baked thoroughly, so that the powder is burned dead and the quality of the particle materials cannot be guaranteed.
Various environment-polluting flue gases can be generated in the manganese ore roasting process, more environment-polluting flue gases can be generated particularly under the condition of insufficient reaction of a rotary kiln, the generated flue gases are directly treated by the conventional rotary kiln so as to reduce the pollution to the environment, but the treatment mode cannot accurately monitor the flue gas amount, the investment cost is high, and the resource waste is serious.
Disclosure of Invention
Therefore, the invention provides a manganese ore roasting rotary kiln system which can effectively solve the technical problems in the prior art.
In order to achieve the above object, the present invention provides a manganese ore roasting rotary kiln system, comprising:
the rotary kiln is respectively connected with the batching system, the feeding system, the tail gas dust removal system and the gas burner, the batching system is used for batching and controlling materials, the feeding system is used for feeding materials, the rotary kiln is used for roasting reaction, the tail gas dust removal system is used for treating tail gas discharged from the kiln, and the gas burner is used for providing flame for the rotary kiln;
the batching system comprises a batching belt scale, and the batching belt scale is used for batching and controlling materials;
the feeding system comprises a disc feeder and a feeding chute, the disc feeder is connected with the feeding chute, and the disc feeder and the feeding chute are used for continuously feeding the rotary kiln;
the tail gas dust removal system comprises a cooler, a bag type dust remover, an induced draft fan and a chimney, wherein the cooler, the bag type dust remover, the induced draft fan and the chimney are sequentially connected, the cooler is used for cooling the kiln discharge tail gas, the bag type dust remover is used for removing particles in dust-containing gas to meet the environmental protection requirement, the induced draft fan is used for guiding the dedusted flue gas to the position of the chimney for emission, and the chimney is used for discharging the flue gas;
the gas burner comprises a gas burner and a control valve group, the gas burner is connected with the control valve group, the control valve group comprises a temperature control valve and a flame control valve, the gas burner is used for forming combustion-supporting air and gas into rotational flow or direct flow, the temperature control valve is used for controlling the combustion temperature, and the flame control valve is used for controlling the combustion flame;
the cooler is provided with a kiln tail gas detection device for detecting the content of various flue gases in the kiln tail gas in real time;
the kiln discharge tail gas detection device comprises a control module which is a PLC control panel, and the PLC control panel is provided with a kiln discharge tail gas matrix S (A, B and C), wherein A represents a first polluted flue gas amount, B represents a second polluted flue gas amount, and C represents a third polluted flue gas amount;
presetting a first polluted flue gas quantity A0, a second polluted flue gas quantity B0 and a third polluted flue gas quantity C0;
the batching belt scale is provided with a quality detection device for detecting the mass of manganese ore for batching, and the mass of the manganese ore is set to be M;
the quality detection device comprises a control module which is a PLC control panel, wherein the PLC control panel is provided with a manganese ore quality standard matrix M0(M1, M2 and M3), M1 is more than M2 and more than M3, wherein M1 represents a first standard quality, M2 represents a second standard quality, and M3 represents a third standard quality;
the quality detection device comprises a control module which is a PLC control panel, the PLC control panel is also provided with a manganese ore increment standard matrix m0(m1, m2), m1 is more than m2, wherein m1 represents a first standard increment, and m2 represents a second standard increment;
at a certain determined moment, if the mass M of the manganese ore is equal to a first standard mass M1, obtaining a value of a first polluted flue gas amount A, if the first polluted flue gas amount A is larger than a preset first polluted flue gas amount A0, adjusting a disc feeder and a feeding chute, and feeding the rotary kiln by a first standard increment M1;
if the first polluted flue gas amount A is less than or equal to a preset first polluted flue gas amount A0, obtaining a value of a second polluted flue gas amount B, and if the second polluted flue gas amount B is greater than a preset second polluted flue gas amount B0, adjusting the disc feeder and the feeding chute to feed the rotary kiln by a first standard increment m 1;
if the second polluted flue gas amount B is less than or equal to a preset second polluted flue gas amount B0, obtaining a value of a third polluted flue gas amount C, and if the third polluted flue gas amount C is greater than a preset third polluted flue gas amount C0, adjusting the disc feeder and the feeding chute to feed the rotary kiln by a first standard increment m 1;
and if the third polluted flue gas amount C is less than or equal to the preset third polluted flue gas amount C0, the roasting reaction of the rotary kiln is sufficient.
Further, at a certain determined moment, if the mass M of the manganese ore is equal to a second standard mass M2, obtaining a value of a first polluted flue gas amount A, and if the first polluted flue gas amount A is larger than a preset first polluted flue gas amount A0, adjusting a disc feeder and a feeding chute, and feeding a rotary kiln with a second standard increment M2;
if the first polluted flue gas amount A is less than or equal to a preset first polluted flue gas amount A0, obtaining a value of a second polluted flue gas amount B, and if the second polluted flue gas amount B is greater than a preset second polluted flue gas amount B0, adjusting the disc feeder and the feeding chute to feed the rotary kiln by a second standard increment m 2;
if the second polluted flue gas amount B is less than or equal to a preset second polluted flue gas amount B0, obtaining a value of a third polluted flue gas amount C, and if the third polluted flue gas amount C is greater than a preset third polluted flue gas amount C0, adjusting the disc feeder and the feeding chute to feed the rotary kiln by a second standard increment m 2;
and if the third polluted flue gas amount C is less than or equal to the preset third polluted flue gas amount C0, the roasting reaction of the rotary kiln is sufficient.
Further, at a certain determined moment, if the mass M of the manganese ore is equal to the third standard mass M3, if any parameter in the kiln discharge tail gas matrix S (a, B, C) is smaller than the corresponding preset value, adjusting the temperature control valve to increase the preset amount Q1, and simultaneously controlling the flame control valve to increase the preset amount Q11;
if all parameters in the kiln discharge tail gas matrix S (A, B and C) are less than or equal to corresponding preset values, the rotary kiln roasting reaction is sufficient;
the maximum preset quantity Q0 is set, the preset quantity Q1 is Q0/10, and the preset quantity Q11 is Q0/20.
The feeding system further comprises a pre-kiln buffer bin and a first needle valve, wherein the pre-kiln buffer bin is connected with the first needle valve, the pre-kiln buffer bin is used for buffering manganese ore, and the first needle valve is used for overhauling the disc feeder;
and the pre-kiln buffer storage bin is provided with a weighing sensor as a material solving signal.
Further, still include the feeding system, the feeding system with the feed system is connected, the feeding system includes the big inclination belt conveyor of material loading for carry the manganese ore after weighing to before the kiln buffer storage feed bin.
The discharging system is connected with the rotary kiln and is used for treating the manganese ore clinker discharged from the kiln;
the discharging system comprises a kiln head heat preservation and buffering bin, a high-temperature discharging valve and a chain plate machine, wherein the kiln head heat preservation and buffering bin, the high-temperature discharging valve and the chain plate machine are sequentially connected, the kiln head heat preservation and buffering bin is used for temporarily storing the discharged manganese ore clinker, the high-temperature discharging valve is used for opening/closing the kiln head heat preservation and buffering bin, and the chain plate machine is used for conveying the discharged manganese ore clinker.
Furthermore, the rotary kiln is provided with a functional belt, and the functional belt is used for preheating, drying, heating, roasting and cooling manganese ores in the rotary kiln.
The gas burner is characterized by further comprising a combustion-supporting fan and an air distribution fan, wherein the combustion-supporting fan and the air distribution fan are both connected with the gas burner, the combustion-supporting fan is used for supporting combustion, and the air distribution fan is used for conveying air in the atmosphere.
Further, the feed proportioning system still includes that the underground receives feed bin, second needle valve, the big inclination belt machine of batching and the reinforced workshop of kiln tail buffer memory feed bin, the underground receives the feed bin the second needle valve the big inclination belt machine of batching with the reinforced workshop buffer memory feed bin of kiln tail connects gradually, the underground receives the feed bin and is used for depositing qualified manganese ore, the second needle valve is used for overhauing the batching belt weigher, the big inclination belt machine of batching be used for with manganese ore in the underground receives the feed bin transports extremely the reinforced workshop buffer memory feed bin of kiln tail, the reinforced workshop buffer memory feed bin of kiln tail is used for buffer memory manganese ore.
The rotary kiln control system is linked with the rotary kiln and used for remotely controlling speed regulation of the rotary kiln and displaying temperature and pressure of each point of a kiln body.
Compared with the prior art, the method has the advantages that the kiln discharge tail gas detection device detects the content of various flue gases in the kiln discharge tail gas, the quality detection device detects the quality of manganese ore for batching, when the content of the flue gases in the kiln discharge tail gas exceeds a preset value, the roasting reaction in the rotary kiln is insufficient, the rotary kiln is fed by adjusting the disc feeder and the feeding chute to increase the quality of the manganese ore in the rotary kiln, so that the roasting reaction in the rotary kiln is more sufficient, the discharge of the flue gas amount is reduced, the cost and the resource for treating the flue gas are saved, and the environmental pollution is reduced.
Furthermore, when the mass of manganese ore in the rotary kiln is large but the amount of polluted flue gas is large, the temperature is increased by adjusting the temperature control valve, and meanwhile, the flame is increased by controlling the flame control valve, so that the roasting reaction in the rotary kiln can be more sufficient, the discharge of the amount of flue gas is reduced, the cost and the resource for treating the flue gas are saved, and the environmental pollution is reduced.
Drawings
FIG. 1 is a schematic structural diagram of a manganese ore roasting rotary kiln system.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 is a schematic structural view of a manganese ore roasting rotary kiln system according to the present invention. The title provides a manganese ore calcination rotary kiln system, includes:
the rotary kiln comprises a batching system 1, a feeding system 2, a rotary kiln 3, a tail gas dust removal system 4 and a gas burner 5, wherein the rotary kiln 3 is respectively connected with the batching system 1, the feeding system 2, the tail gas dust removal system 4 and the gas burner 5, the batching system 1 is used for batching and controlling materials, the feeding system 2 is used for feeding materials, the rotary kiln 3 is used for carrying out roasting reaction, the tail gas dust removal system 4 is used for treating kiln-out tail gas, and the gas burner 5 is used for providing flame for the rotary kiln 3; the batching system 1 comprises a batching belt scale 13, wherein the batching belt scale 13 is used for batching and controlling materials, the batching belt scale 13 adopts a dragging type belt scale, the variable frequency speed regulation can be realized, the specification is B800, and the length is 2900 mm; the feeding system 2 comprises a disc feeder 23 and a feeding chute 24, the disc feeder 23 is connected with the feeding chute 24, the disc feeder 23 and the feeding chute 24 are both used for continuously feeding the rotary kiln 3, the disc feeder 23 is DK20 in specification, can realize variable frequency speed regulation and is in a closed hanging type; the tail gas dust removal system 4 comprises a cooler 41, a bag type dust remover 42, an induced draft fan 43 and a chimney 44, wherein the cooler 41, the bag type dust remover 42, the induced draft fan 43 and the chimney 44 are sequentially connected, the cooler 41 is used for cooling kiln discharge tail gas, the bag type dust remover 42 is used for removing particles in dust-containing gas to meet the environmental protection requirement, the induced draft fan 43 is used for guiding the dedusted flue gas to the chimney 44 for emission, and the chimney 44 is used for discharging the flue gas; the gas burner 5 comprises a gas burner 51 and a control valve group 52, the gas burner 51 is connected with the control valve group 52, the control valve group 52 comprises a temperature control valve and a flame control valve, the gas burner 51 is used for forming swirl or direct flow of combustion-supporting air and gas, the temperature control valve is used for controlling the combustion temperature, the flame control valve is used for controlling the combustion flame, the gas burner 51 is composed of a plurality of hollow sleeves and a spiral flow guide body, the gas burner 5 adopts an SR four-channel gas burner with the model number of SR2-250Q/20T and single heat supply capacity: 3000 multiplied by 104kcal/h, the burner has long service life, stable flame, high burnout rate, energy conservation, consumption reduction, simple and convenient installation, maintenance and replacement of head parts; the cooler 41 is provided with a kiln discharge tail gas detection device for detecting the content of various flue gases in kiln tail gas in real time; the kiln discharge tail gas detection device comprises a control module which is a PLC control panel, the PLC control panel is provided with a kiln discharge tail gas matrix S (A, B and C), wherein A represents a first polluted flue gas amount, B represents a second polluted flue gas amount, C represents a third polluted flue gas amount, and various types of flue gases and contents are changed according to the batching requirements of subsequent submerged arc furnace smelting; presetting a first polluted flue gas quantity A0, a second polluted flue gas quantity B0 and a third polluted flue gas quantity C0; the batching belt scale 13 is provided with a quality detection device for detecting the mass of manganese ore for batching, and the mass of the manganese ore is set to be M; the quality detection device comprises a control module which is a PLC control panel, wherein the PLC control panel is provided with a manganese ore quality standard matrix M0(M1, M2 and M3), M1 is more than M2 and more than M3, wherein M1 represents a first standard quality, M2 represents a second standard quality, and M3 represents a third standard quality; the quality detection device comprises a control module which is a PLC control panel, the PLC control panel is also provided with a manganese ore increment standard matrix m0(m1, m2), m1 is more than m2, wherein m1 represents a first standard increment, and m2 represents a second standard increment; at a certain determined moment, if the mass M of the manganese ore is equal to a first standard mass M1, obtaining a value of a first polluted flue gas quantity A, if the first polluted flue gas quantity A is larger than a preset first polluted flue gas quantity A0, adjusting the disc feeder 23 and the feeding chute 24, and feeding the rotary kiln 3 by a first standard increment M1; if the first polluted flue gas amount A is less than or equal to a preset first polluted flue gas amount A0, obtaining a value of a second polluted flue gas amount B, and if the second polluted flue gas amount B is greater than a preset second polluted flue gas amount B0, adjusting the disc feeder 23 and the feeding chute 24, and feeding the rotary kiln 3 with a first standard increment m 1; if the second polluted flue gas amount B is less than or equal to a preset second polluted flue gas amount B0, obtaining a value of a third polluted flue gas amount C, and if the third polluted flue gas amount C is greater than a preset third polluted flue gas amount C0, adjusting the disc feeder 23 and the feeding chute 24, and feeding the rotary kiln 3 by a first standard increment m 1; if the third polluted flue gas amount C is less than or equal to the preset third polluted flue gas amount C0, the roasting reaction of the rotary kiln 3 is sufficient. The kiln discharge tail gas detection device detects the content of various flue gases in the kiln tail gas, the quality detection device detects the quality of manganese ore for batching, when the content of the flue gas in the kiln discharge tail gas exceeds a preset value, the roasting reaction in the rotary kiln 3 is insufficient, and the rotary kiln 3 is fed by adjusting the disc feeder 23 and the feeding chute 24 to increase the quality of the manganese ore in the rotary kiln 3, so that the roasting reaction in the rotary kiln 3 is more sufficient, the discharge of the flue gas amount is reduced, the cost and the resource for treating the flue gas are saved, and the environmental pollution is reduced.
Specifically, at a certain determined moment, if the mass M of the manganese ore is equal to the second standard mass M2, obtaining a value of a first polluted flue gas amount A, and if the first polluted flue gas amount A is larger than a preset first polluted flue gas amount A0, adjusting the disc feeder 23 and the feeding chute 24, and feeding the rotary kiln 3 by a second standard increment M2; if the first polluted flue gas amount A is less than or equal to a preset first polluted flue gas amount A0, obtaining a value of a second polluted flue gas amount B, and if the second polluted flue gas amount B is greater than a preset second polluted flue gas amount B0, adjusting the disc feeder 23 and the feeding chute 24, and feeding the rotary kiln 3 with a second standard increment m 2; if the second polluted flue gas amount B is less than or equal to a preset second polluted flue gas amount B0, obtaining a value of a third polluted flue gas amount C, and if the third polluted flue gas amount C is greater than a preset third polluted flue gas amount C0, adjusting the disc feeder 23 and the feeding chute 24, and feeding the rotary kiln 3 with a second standard increment m 2; if the third polluted flue gas amount C is less than or equal to the preset third polluted flue gas amount C0, the roasting reaction of the rotary kiln 3 is sufficient. When the smoke content in the kiln discharge tail gas exceeds a preset value, the roasting reaction in the rotary kiln 3 is insufficient, the rotary kiln 3 is fed by adjusting the disc feeder 23 and the feeding chute 24 to increase the quality of manganese ore in the rotary kiln 3, so that the roasting reaction in the rotary kiln 3 is more sufficient, the discharge of smoke amount is reduced, the cost and resources for treating smoke are saved, and the environmental pollution is reduced.
Specifically, at a certain determined moment, if the mass M of the manganese ore is equal to the third standard mass M3, and if any parameter in the discharge tail gas matrix S (a, B, C) is smaller than the corresponding preset value, adjusting the temperature control valve to increase the preset amount Q1, and simultaneously controlling the flame control valve to increase the preset amount Q11; if all parameters in the kiln discharge tail gas matrix S (A, B and C) are less than or equal to corresponding preset values, the rotary kiln roasting reaction is sufficient; the maximum preset quantity Q0 is set, the preset quantity Q1 is Q0/10, and the preset quantity Q11 is Q0/20. When the mass of manganese ore in the rotary kiln 3 is large but the amount of polluted flue gas is large, the temperature is increased by adjusting the temperature control valve, and the flame is increased by controlling the flame control valve, so that the roasting reaction in the rotary kiln 3 can be more sufficient, the discharge of the amount of flue gas is reduced, the cost and the resource for treating the flue gas are saved, and the environmental pollution is reduced.
Particularly, feed system 2 still includes buffer memory feed bin 21 and first needle type valve 22 before the kiln, buffer memory feed bin 21 before the kiln with first needle type valve 22 is connected, buffer memory feed bin 21 before the kiln is used for buffering manganese ore, first needle type valve 22 is used for overhauing disc feeder 23, buffer memory feed bin effective volume before the kiln is 30m3The specification of the plate is 12mm, the material is Q235, and the specification of the first needle valve 22 is 400x400 mm; the pre-kiln buffer storage bin 21 is provided with a weighing sensor as a material solving signal, the weighing sensors are 25t weighing sensors and are 4 in total, the weighing sensors are high-strength double-end-beam weighing sensors, and ideal weighing performance can be provided. In the embodiment of the invention, the pre-kiln buffer storage bin 21 feeds the buffered manganese ore to the rotary kiln 3 through the disc feeder 23 and the feeding chute 24, so that the roasting reaction in the rotary kiln 3 can be controlled by controlling the feeding amount.
Particularly, still include feeding system 6, feeding system 6 with feed system 2 connects, feeding system 6 includes big inclination belt feeder 61 of material loading for carry the manganese ore after weighing buffer memory feed bin 21 before the kiln, big inclination belt feeder 61 of material loading adopts the big inclination belt feeder of B1000, and is high temperature resistant, long service life.
Specifically, the kiln comprises a discharging system 7, wherein the discharging system 7 is connected with the rotary kiln 3 and is used for treating the manganese ore clinker discharged from the kiln; the discharging system 7 comprises a kiln head heat-preservation buffer bin 71, a high-temperature discharge valve 72 and a chain plate machine 73, the kiln head heat-preservation buffer bin 71, the high-temperature discharge valve 72 and the chain plate machine 73 are sequentially connected, the kiln head heat-preservation buffer bin 71 is used for temporarily storing manganese ore clinker discharged from a kiln, the high-temperature discharge valve 72 is used for opening/closing the kiln head heat-preservation buffer bin 71, the chain plate machine 73 is used for conveying the manganese ore clinker discharged from the kiln, the volume of the kiln head heat-preservation buffer bin 71 is about 20m3, the chain plate machine 73 is B800 in specification and about 30m in length, the chain plate machine 73 conveys the manganese ore clinker into a manganese ore drying material shed according to the temperature change of the manganese ore after roasting, the roasted clinker is cooled naturally, then the cooled clinker is conveyed into a dump truck by using a shovel truck, and the manganese ore clinker is conveyed into a receiving bin of a mineral ore batching station, entering a smelting proportioning system 1 process of the submerged arc furnace. In the embodiment of the invention, the kiln head heat preservation and buffering bin 71 temporarily stores the manganese ore clinker after the roasting reaction, when necessary, the high-temperature discharge valve 72 is opened, and the chain plate machine 73 transports the manganese ore clinker in the kiln head heat preservation and buffering bin 71 to the next procedure, so that the continuity of the whole procedure can be ensured.
Specifically, the rotary kiln 3 is provided with a functional belt 31, and the functional belt 31 is used for preheating, drying, heating, roasting and cooling manganese ore in the rotary kiln 3. Thereby obtaining better manganese ore clinker.
Specifically, the gas burner further comprises a combustion-supporting fan 53 and an air distribution fan 54, wherein the combustion-supporting fan 53 and the air distribution fan 54 are both connected with the gas burner 5, the combustion-supporting fan 53 is used for supporting combustion, and the air distribution fan 54 is used for conveying air in the atmosphere. When the gas burner 5 in the embodiment of the invention burns gas, the combustion fan 53 and the air distribution fan 54 support combustion and add air to the gas burner, so that the fuel in the gas burner 5 is more fully burnt, thereby saving time and reducing waste caused by insufficient fuel burning.
Particularly, the batching system 1 further comprises an underground receiving bin 11, a second needle valve 12, a batching large-inclination-angle belt conveyor 14 and a kiln tail feeding workshop cache bin 15, wherein the underground receiving bin 11, the second needle valve 12, the batching large-inclination-angle belt conveyor 14 and the kiln tail feeding workshop cache bin 15 are sequentially connected, the underground receiving bin is used for storing manganese ores with qualified granularity, the second needle valve 12 is used for overhauling the batching belt conveyor 13, the batching large-inclination-angle belt conveyor 14 is used for transporting the manganese ores in the underground receiving bin 11 to the kiln tail feeding workshop cache bin 15, the kiln tail feeding workshop cache bin 15 is used for caching the manganese ores, the manganese ores with qualified granularity are sent to the underground receiving bin 11 through a loading machine or a dump truck, the number of the underground receiving bins 11 is 3, the effective volume of each underground receiving bin 11 is 30m3, the size of the upper opening of the underground receiving bin 11 is 4500x4500mm, the thickness of each plate is 12mm, a heavy-duty grate plate is arranged on the underground receiving bin 11, the thickness of each plate is 12mm, the material quality of each plate is Q235, and the specification of the second needle valve 12 is 400x400 mm. In the embodiment of the invention, the underground receiving bin 11 stores manganese ore with qualified particle size in a raw material plant, the proportioning belt scale 13 weighs the stored manganese ore, and the proportioning belt conveyor 14 transports the stored manganese ore to the cache bin 15 of the kiln tail charging workshop for caching, so that the manganese ore can be prepared to enter the charging system 6.
The rotary kiln control system is connected with the rotary kiln 3 and used for remotely controlling speed regulation of the rotary kiln 3 and temperature and pressure of each point of a kiln body, the rotary kiln 3 control system adopts Siemens S7-300 series, a CPU adopts 315-2PN/DP, an upper computer adopts an industrial control computer, programming software adopts Siemens STEP7V5.5, HMI software adopts Siemens WINCC, industrial Ethernet communication is adopted between the upper computer and a PLC, and DP optical fiber communication is adopted between a main station and a sub station. Thereby the roasting reaction of the rotary kiln 3 can be remotely controlled, the time is saved, and the safety is improved.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention; various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A manganese ore roasting rotary kiln system is characterized by comprising:
the rotary kiln is respectively connected with the batching system, the feeding system, the tail gas dust removal system and the gas burner, the batching system is used for batching and controlling materials, the feeding system is used for feeding materials, the rotary kiln is used for roasting reaction, the tail gas dust removal system is used for treating tail gas discharged from the kiln, and the gas burner is used for providing flame for the rotary kiln;
the batching system comprises a batching belt scale, and the batching belt scale is used for batching and controlling materials;
the feeding system comprises a disc feeder and a feeding chute, the disc feeder is connected with the feeding chute, and the disc feeder and the feeding chute are used for continuously feeding the rotary kiln;
the tail gas dust removal system comprises a cooler, a bag type dust remover, an induced draft fan and a chimney, wherein the cooler, the bag type dust remover, the induced draft fan and the chimney are sequentially connected, the cooler is used for cooling the kiln discharge tail gas, the bag type dust remover is used for removing particles in dust-containing gas to meet the environmental protection requirement, the induced draft fan is used for guiding the dedusted flue gas to the position of the chimney for emission, and the chimney is used for discharging the flue gas;
the gas burner comprises a gas burner and a control valve group, the gas burner is connected with the control valve group, the control valve group comprises a temperature control valve and a flame control valve, the gas burner is used for forming combustion-supporting air and gas into rotational flow or direct flow, the temperature control valve is used for controlling the combustion temperature, and the flame control valve is used for controlling the combustion flame;
the cooler is provided with a kiln tail gas detection device for detecting the content of various flue gases in the kiln tail gas in real time;
the kiln discharge tail gas detection device comprises a control module which is a PLC control panel, and the PLC control panel is provided with a kiln discharge tail gas matrix S (A, B and C), wherein A represents a first polluted flue gas amount, B represents a second polluted flue gas amount, and C represents a third polluted flue gas amount;
presetting a first polluted flue gas quantity A0, a second polluted flue gas quantity B0 and a third polluted flue gas quantity C0;
the batching belt scale is provided with a quality detection device for detecting the mass of manganese ore for batching, and the mass of the manganese ore is set to be M;
the quality detection device comprises a control module which is a PLC control panel, wherein the PLC control panel is provided with a manganese ore quality standard matrix M0(M1, M2 and M3), M1 is more than M2 and more than M3, wherein M1 represents a first standard quality, M2 represents a second standard quality, and M3 represents a third standard quality;
the quality detection device comprises a control module which is a PLC control panel, the PLC control panel is also provided with a manganese ore increment standard matrix m0(m1, m2), m1 is more than m2, wherein m1 represents a first standard increment, and m2 represents a second standard increment;
at a certain determined moment, if the mass M of the manganese ore = a first standard mass M1, obtaining a value of a first polluted smoke gas A, and if the first polluted smoke gas A is larger than a preset first polluted smoke gas A0, adjusting a disc feeder and a feeding chute, and feeding a rotary kiln by a first standard increment M1;
if the first polluted flue gas amount A is less than or equal to a preset first polluted flue gas amount A0, obtaining a value of a second polluted flue gas amount B, and if the second polluted flue gas amount B is greater than a preset second polluted flue gas amount B0, adjusting the disc feeder and the feeding chute to feed the rotary kiln by a first standard increment m 1;
if the second polluted flue gas amount B is less than or equal to a preset second polluted flue gas amount B0, obtaining a value of a third polluted flue gas amount C, and if the third polluted flue gas amount C is greater than a preset third polluted flue gas amount C0, adjusting the disc feeder and the feeding chute to feed the rotary kiln by a first standard increment m 1;
and if the third polluted flue gas amount C is less than or equal to the preset third polluted flue gas amount C0, the roasting reaction of the rotary kiln is sufficient.
2. The manganese ore roasting rotary kiln system according to claim 1, wherein at a certain determined moment, if the manganese ore mass M = the second standard mass M2, a value of the first polluted flue gas amount a is obtained, and if the first polluted flue gas amount a > a preset first polluted flue gas amount a0, the disc feeder and the feeding chute are adjusted to feed the rotary kiln with a second standard increment M2;
if the first polluted flue gas amount A is less than or equal to a preset first polluted flue gas amount A0, obtaining a value of a second polluted flue gas amount B, and if the second polluted flue gas amount B is greater than a preset second polluted flue gas amount B0, adjusting the disc feeder and the feeding chute to feed the rotary kiln by a second standard increment m 2;
if the second polluted flue gas amount B is less than or equal to a preset second polluted flue gas amount B0, obtaining a value of a third polluted flue gas amount C, and if the third polluted flue gas amount C is greater than a preset third polluted flue gas amount C0, adjusting the disc feeder and the feeding chute to feed the rotary kiln by a second standard increment m 2;
and if the third polluted flue gas amount C is less than or equal to the preset third polluted flue gas amount C0, the roasting reaction of the rotary kiln is sufficient.
3. The manganese ore roasting rotary kiln system according to claim 2, wherein at a certain determined moment, if the mass M of the manganese ore = the third standard mass M3, if any parameter in the kiln exit gas matrix S (A, B, C) is greater than the corresponding preset value, the temperature control valve is adjusted to increase the preset amount Q1, and the flame control valve is simultaneously controlled to increase the preset amount Q11;
if all parameters in the kiln discharge tail gas matrix S (A, B and C) are less than or equal to corresponding preset values, the rotary kiln roasting reaction is sufficient;
the maximum preset quantity Q0 is set, the preset quantity Q1 is Q0/10, and the preset quantity Q11 is Q0/20.
4. The manganese ore roasting rotary kiln system according to claim 1, wherein the feeding system further comprises a pre-kiln buffer bin and a first needle valve, the pre-kiln buffer bin is connected with the first needle valve, the pre-kiln buffer bin is used for buffering manganese ore, and the first needle valve is used for overhauling the disc feeder;
and the pre-kiln buffer storage bin is provided with a weighing sensor as a material solving signal.
5. The manganese ore roasting rotary kiln system according to claim 4, further comprising a feeding system, wherein the feeding system is connected with the feeding system, and the feeding system comprises a large-inclination-angle belt feeding machine used for conveying the weighed manganese ore to the pre-kiln buffer storage bin.
6. The manganese ore roasting rotary kiln system according to claim 1, further comprising a discharging system connected to the rotary kiln for processing manganese ore clinker discharged from the kiln;
the discharging system comprises a kiln head heat preservation and buffering bin, a high-temperature discharging valve and a chain plate machine, wherein the kiln head heat preservation and buffering bin, the high-temperature discharging valve and the chain plate machine are sequentially connected, the kiln head heat preservation and buffering bin is used for temporarily storing the discharged manganese ore clinker, the high-temperature discharging valve is used for opening/closing the kiln head heat preservation and buffering bin, and the chain plate machine is used for conveying the discharged manganese ore clinker.
7. The manganese ore roasting rotary kiln system according to claim 1, wherein the rotary kiln is provided with functional belts for preheating, drying, heating, roasting and cooling manganese ore in the rotary kiln.
8. The manganese ore roasting rotary kiln system according to claim 1, further comprising a combustion fan and an air distribution fan, wherein the combustion fan and the air distribution fan are both connected with the gas burner, the combustion fan is used for supporting combustion, and the air distribution fan is used for conveying air in the atmosphere.
9. The manganese ore roasting rotary kiln system according to claim 1, wherein the batching system further comprises an underground receiving bin, a second needle valve, a batching large-inclination-angle belt conveyor and a kiln tail charging workshop cache bin, the underground receiving bin, the second needle valve, the batching large-inclination-angle belt conveyor and the kiln tail charging workshop cache bin are sequentially connected, the underground receiving bin is used for storing qualified manganese ores, the second needle valve is used for overhauling the batching belt scale, the batching large-inclination-angle belt conveyor is used for transporting the manganese ores in the underground receiving bin to the kiln tail charging workshop cache bin, and the kiln tail charging workshop cache bin is used for caching the manganese ores.
10. The manganese ore roasting rotary kiln system according to claim 1, further comprising a rotary kiln control system, wherein the rotary kiln control system is linked with the rotary kiln and used for remotely controlling speed regulation of the rotary kiln and temperature and pressure display of each point of a kiln body.
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| CN115232973B (en) * | 2022-07-27 | 2024-05-07 | 修水县德瑞科技有限公司 | Device for improving leaching rate of copper-zinc ash and improving method thereof |
| CN116294570B (en) * | 2023-04-03 | 2023-12-01 | 内蒙古景蕾实业有限公司 | Medium-low grade manganese ore pretreatment rotary kiln and feeding system |
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| CN103307873A (en) * | 2013-06-26 | 2013-09-18 | 中冶长天国际工程有限责任公司 | Method for detecting flue-gas temperature in rotary kiln |
| CN203878184U (en) * | 2014-06-04 | 2014-10-15 | 北京中冶设备研究设计总院有限公司 | Reducing roasting device of copper slag rotary kiln |
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| CN102883794A (en) * | 2010-02-04 | 2013-01-16 | Ada-Es股份有限公司 | Method and system for controlling mercury emissions from coal-fired thermal processes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103307873A (en) * | 2013-06-26 | 2013-09-18 | 中冶长天国际工程有限责任公司 | Method for detecting flue-gas temperature in rotary kiln |
| CN203878184U (en) * | 2014-06-04 | 2014-10-15 | 北京中冶设备研究设计总院有限公司 | Reducing roasting device of copper slag rotary kiln |
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