CN214244560U - Zinc-containing blast furnace gas ash smelting device - Google Patents
Zinc-containing blast furnace gas ash smelting device Download PDFInfo
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- CN214244560U CN214244560U CN202022231136.7U CN202022231136U CN214244560U CN 214244560 U CN214244560 U CN 214244560U CN 202022231136 U CN202022231136 U CN 202022231136U CN 214244560 U CN214244560 U CN 214244560U
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Abstract
The utility model provides a zinc-containing blast furnace gas ash smelting device belongs to gas ash smelting equipment technical field, including the smelting furnace, feeding mechanism, discharge mechanism and monitoring mechanism, the smelting furnace is rectangular shape, the lower part is buried underground in the ground, be the contained angle setting between smelting furnace bottom surface and the horizontal plane, the both ends of smelting furnace are equipped with feed inlet and discharge gate respectively, the smelting furnace is used for zinc-containing smelting gas ash and output molten iron and zinc oxide crude product, feeding mechanism locates feed inlet department, be used for to carrying blast furnace gas ash dry bulb in the smelting furnace, discharge mechanism locates discharge gate department, be used for accepting molten iron and liquid slag from output in the smelting furnace, monitoring mechanism locates the inboard top of smelting furnace, be used for monitoring and smelt interior temperature of furnace and material reaction process. The utility model provides a zinc-containing blast furnace gas ash smelting device has the smelting that rectangular shape smelting furnace can be used to zinc-containing gas ash, and the smelting in-process reaction is stable and quick technological effect.
Description
Technical Field
The utility model belongs to the technical field of gas ash smelting equipment, more specifically say, relate to a zinciferous blast furnace gas ash smelting device.
Background
At present, dust particles discharged along with blast furnace gas in the blast furnace smelting process are collected by a gravity dust removal bag-type dust collector to form bag ash, the bag ash is also commonly called as gas ash, the carbon content of the gas ash is up to 30-50%, the iron content is low, 15-30%, the contents of zinc, sodium and the like are high, and elements such as zinc, sodium and the like have great harm to the blast furnace and can not be directly used for sintering ingredients generally.
Steel mill systems also have other fly ashes, such as: the dust removal ash of a coking coal yard, the dust removal ash of a belt gallery of coal and coke and the dust removal ash of a dry quenching system are characterized by high carbon content; the dust-removing ash has high iron content (up to more than 50%), high contents of sodium, zinc and the like, is directly used for sintering ingredients, and has large harm to blast furnace smelting due to the zinc and the sodium.
Solid wastes with high contents of zinc, sodium and the like are common problems faced by various steel mills, and direct discharge of solid wastes such as gas ash and the like is not allowed because of the characteristic that a blast furnace is not suitable for smelting zinc-containing solid wastes, so that various treatment methods are adopted to treat the solid wastes, such as a magnetic separation method, a roasting method, a rotary hearth furnace method and the like, and the treatment methods have advantages and disadvantages, but the treatment of the gas ash still has an undesirable part, and the conventional blast furnace is also not suitable for smelting zinc-containing blast furnace gas ash, so that a smelting device suitable for smelting the zinc-containing blast furnace gas ash is urgently needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a zinc-containing blast furnace gas ash smelting device aims at solving the technical problem that current blast furnaces are not suitable for smelting zinc-containing gas ash.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a zinc-containing blast furnace gas ash smelting device, which comprises a smelting furnace, a feeding mechanism, a discharging mechanism and a monitoring mechanism, wherein the smelting furnace is in a long strip shape, the lower part of the smelting furnace is buried under the ground, an included angle is formed between the bottom surface of the smelting furnace and the horizontal plane, a feeding hole and a discharging hole are respectively arranged at two ends of the smelting furnace, and the smelting furnace is used for smelting zinc-containing gas ash and producing molten iron and a crude zinc oxide product; the feeding mechanism is arranged at the feeding port and used for conveying the blast furnace gas ash dry balls into the smelting furnace; the discharging mechanism is arranged at the discharging opening and is used for receiving the molten iron and the liquid slag output from the smelting furnace; the monitoring mechanism is arranged at the top of the inner side of the smelting furnace and used for monitoring the temperature and the material reaction process in the smelting furnace.
As another embodiment of the present application, the feeding mechanism comprises a weighing platform, a bin and a feeding pipeline, wherein the weighing platform is used for weighing the weight of the gas ash to be fed into the smelting furnace; the storage bin is used for containing the gas ash dry balls, and the weighed gas ash dry balls are placed in the storage bin for temporary storage; the feeding pipeline is obliquely arranged, one end of the feeding pipeline is communicated with the storage bin, the other end of the feeding pipeline is connected with the feeding port, and gas ash dry balls in the storage bin are conveyed into the smelting furnace through the feeding pipeline.
As another embodiment of the application, the discharging mechanism comprises a slag avoiding device, a molten iron runner and a slag runner, the slag avoiding device is communicated with the discharging port and is used for receiving the output molten iron and liquid slag, and the slag avoiding device is used for separating the molten iron and the liquid slag; the molten iron runner is communicated with the output end of the slag avoiding device, and the molten iron flows to the molten iron runner after the molten iron is separated by the slag avoiding device; the slag runner is communicated with the output end of the slag avoiding device, and after the slag avoiding device separates the liquid slag, the liquid slag flows to the slag runner.
As another embodiment of the present application, the monitoring mechanism includes a temperature monitor and an imager, the temperature monitor is disposed at the top of the inner side of the smelting furnace and is used for monitoring the temperature in the smelting furnace; the imager is arranged at the top of the inner side of the smelting furnace and is used for collecting images in the reaction process in the smelting furnace.
As another embodiment of the application, the smelting furnace comprises a furnace body, a high-temperature air pipe and a waste gas outlet pipe, wherein the lower part of the furnace body is buried underground, and the upper part of the furnace body is located on the ground; the high-temperature air pipes are arranged on two sides of the smelting furnace, communicated into the smelting furnace and communicated with a high-temperature air source, and the high-temperature air source conveys high-temperature air into the smelting furnace through the high-temperature air pipes; the waste gas exit tube is a plurality of, all locates smelting furnace upper end and intercommunication to in the smelting furnace, the waste gas that produces in the smelting furnace passes through the waste gas exit tube gets into waste gas waste heat recovery system, discharges up to standard after cooling, dust removal.
As another embodiment of the application, the smelting furnace is sequentially divided into a reaction zone, a transition zone and a slag-iron separation zone along the direction from the feeding hole to the discharging hole, the bottom of the reaction zone is arranged under the ground and has a long-strip groove-shaped structure, materials entering the smelting furnace react in the reaction zone, and the feeding hole is positioned at the feeding end of the reaction zone; the bottom of the transition area is arranged under the ground and is in a curved arc groove type structure, and the materials in the reaction area flow into the transition area; the bottom in sediment iron disengagement zone is arranged in the underground and is rectangular cell type structure, and the molten iron that produces in the reaction and sediment pass through the transition zone flows extremely sediment iron disengagement zone sediment and iron separation in the sediment iron disengagement zone, the discharge gate is located the discharge end of sediment iron disengagement zone, the transition zone both ends circular arc transition respectively accept the reaction zone with the sediment iron disengagement zone.
As another embodiment of this application, bury underground in subaerial the reaction zone the transition district with the sediment iron separation zone is the cell type structure, leaks in subaerial the reaction zone the transition district with the sediment iron separation zone be with the domes of cell type structure looks adaptation, domes with the mutual butt joint lock of cell type structure forms an organic whole and inside is cavity.
As another embodiment of the application, an oxygen pumping assembly for pumping oxygen into the smelting furnace is arranged at the feeding port.
As another embodiment of this application, the feed inlet is located the shallower one end of burial depth on the smelting furnace, the discharge gate is located the deeper one end of burial depth on the smelting furnace.
As another embodiment of the present application, the smelting furnace includes a shell made of a thick steel plate and refractory bricks laid on the inner wall of the shell, and the interior of the shell is hollow.
The utility model provides a zinc-containing blast furnace gas ash smelting device's beneficial effect lies in: compared with the prior art, the utility model discloses zinc-containing blast furnace gas ash smelting device, the smelting furnace is buried underground subaerial and personally submits an contained angle with the level, the material gets into the smelting furnace after from the feed inlet, because the slope sets up the smelting furnace, the material can be followed discharge gate department output after the smelting furnace internal reaction, carry high temperature air to the furnace body through the high temperature air pipe, be used for the coal gas that produces in the combustion reaction process, and emit the heat, maintain the interior high temperature environment of stove, waste gas that produces in the reaction can go into waste heat recovery, discharge to reach standard behind the dust pelletizing system, zinc-containing gas ash sends into the smelting furnace through feeding mechanism, export through discharge mechanism after the reaction, can see out the interior temperature of smelting furnace and reaction process through monitoring mechanism, this rectangular shape smelting furnace is horizontal setting, can handle zinc-containing gas ash, the technical problem that current blast furnace is not fit for smelting blast furnace gas ash has been solved, the long-strip-shaped smelting furnace can be used for smelting the zinc-containing gas ash, and has the technical effect of stable and quick reaction in the smelting process.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural view of a zinc-containing blast furnace gas ash smelting device provided by an embodiment of the present invention;
FIG. 2 is a sectional view taken along line A-A in FIG. 1 (side view of the upper and lower furnace structures);
FIG. 3 is a sectional view taken along line B-B in FIG. 1 (plan view of the lower furnace structure);
FIG. 4 is a plan view of the smelting furnace of the blast furnace gas ash smelting device containing zinc provided by the embodiment of the utility model.
In the figure: 1. a smelting furnace; 11. a furnace body; 111. a reaction zone; 112. a transition zone; 113. a slag iron separation zone; 12. a high temperature air pipe; 13. an exhaust gas outlet pipe; 2. a feeding mechanism; 21. a weighing platform; 22. a storage bin; 23. a feed line; 3. a discharging mechanism; 31. a slag avoiding device; 32. a molten iron runner; 33. a slag runner; 4. a monitoring mechanism; 41. a temperature monitor; 42. an imager; 5. a feed inlet; 6. a discharge port; 7. an oxygen pumping assembly.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 4 together, a zinc-containing blast furnace gas ash smelting device provided by the present invention will now be described. The zinc-containing blast furnace gas ash smelting device comprises a smelting furnace 1, a feeding mechanism 2, a discharging mechanism 3 and a monitoring mechanism 4, wherein the smelting furnace 1 is in a long strip shape, the lower part of the smelting furnace 1 is buried under the ground, an included angle is formed between the bottom surface of the smelting furnace 1 and the horizontal plane, a feeding hole 5 and a discharging hole 6 are respectively formed in two ends of the smelting furnace 1, and the smelting furnace 1 is used for smelting zinc-containing gas ash and producing molten iron and a crude zinc oxide product; the feeding mechanism 2 is arranged at the feeding hole 5 and used for conveying the blast furnace gas ash dry balls into the smelting furnace 1; the discharging mechanism 3 is arranged at the discharging port 6 and is used for receiving the molten iron and the liquid slag output from the smelting furnace 1; the monitoring mechanism 4 is arranged at the top of the inner side of the smelting furnace 1 and is used for monitoring the temperature and the material reaction process in the smelting furnace 1.
Compared with the prior art, the utility model provides a zinc-containing blast furnace gas ash smelting device, the utility model discloses zinc-containing blast furnace gas ash smelting device, smelting furnace 1 buries underground and personally submits an contained angle with the level, after the material gets into smelting furnace 1 from feed inlet 5, because the slope sets up smelting furnace 1, the material can export from discharge gate 6 after the smelting furnace internal reaction, carry high temperature air through high temperature air pipe 12 to smelting furnace 1, be used for the coal gas that produces in the combustion reaction process, and emit the heat, maintain the interior high temperature environment of stove, waste gas that produces in the reaction can pass through waste heat recovery, discharge to reach standard behind the dust pelletizing system, zinc-containing gas ash sends into smelting furnace 1 through feeding mechanism 2, export through discharge mechanism 3 after the reaction, can see out temperature and reaction process in smelting furnace 1 through monitoring mechanism 4, this rectangular shape smelting furnace 1 is horizontal setting, can treat the zinc-containing gas ash, solves the technical problem that the existing blast furnace is not suitable for smelting the blast furnace gas ash, and has the technical effects that the strip-shaped smelting furnace 1 can be used for smelting the zinc-containing gas ash, and the reaction is stable and quick in the smelting process.
The structure of the smelting furnace 1 can be the furnace body structure of the smelting furnace 1 in the prior art, and the smelting furnace 1 has the functions of smelting and the like. Before smelting furnace 1 is put into to the gas ash, make the gas ash into dry-bulb, put into smelting furnace 1 inside with dry-bulb again, smelting furnace 1 is flat after crouching, can make the inside material of smelting furnace 1 constantly move to discharge gate 6 side from feed inlet 5 side in the reaction, like this when the completion back of material reaction in smelting furnace 1, then molten iron and slag will collect discharge gate 6 side, open discharge gate 6, and molten iron and slag are discharged in succession. Through the design the utility model discloses a smelting furnace 1, without other instrument and operation, feeding mechanism 2 and discharge mechanism 3 make the material can get into smelting furnace 1 automatically, and the material after the reaction can discharge automatically, compare in blast furnace smelting gas ash, and it is more convenient to operate.
As a specific implementation manner of the zinc-containing blast furnace gas ash smelting device provided by the present invention, please refer to fig. 1 to 4, the feeding mechanism 2 includes a weighing platform 21, a storage bin 22 and a feeding pipeline 23, the weighing platform 21 is used for weighing the weight of the gas ash to be fed into the smelting furnace 1; the storage bin 22 is used for containing gas ash dry balls, and the weighed gas ash rolling balls are placed in the storage bin 22 for temporary storage; the feeding pipeline 23 is obliquely arranged, one end of the feeding pipeline is communicated with the storage bin 22, the other end of the feeding pipeline is connected with the feeding hole 5, and the gas ash dry balls in the storage bin 22 are conveyed into the smelting furnace 1 through the feeding pipeline 23. The dry gas ash balls are weighed in advance according to a certain weight, and the dry gas ash balls are added according to the certain weight, so that molten iron, crude zinc oxide and the like with certain weight can be produced, and certain requirements are met, so that the dry gas ash balls can be weighed through the weighing table 21, and the dry gas ash balls can enter the smelting furnace 1 after being weighed.
In the feed bin 22 is entered into after the gas ash dry ball is weighed, this process can be realized with mechanical tool or other conveying machinery, the gas ash dry ball that is located in feed bin 22 passes through feed pipeline 23 and descends and carry to feed inlet 5 automatically, and then enters into smelting furnace 1 inside, feed bin 22 is the wide-mouthed type, is sealing connection between feed pipeline 23 and the feed inlet 5, and the contained angle is about 45 between feed pipeline 23 and the horizontal plane.
As a specific embodiment of the blast furnace gas ash smelting device containing zinc provided by the present invention, please refer to fig. 1 to 4, the discharging mechanism 3 includes a slag avoiding device 31, an iron runner 32 and a slag runner 33, the slag avoiding device 31 is communicated with the discharging port 6 and receives the output molten iron and liquid slag, and the slag avoiding device 31 is used for separating the molten iron and the liquid slag; the molten iron runner 32 is communicated with the output end of the slag avoiding device 31, and after the molten iron is separated by the slag avoiding device 31, the molten iron flows to the molten iron runner 32; the slag runner 33 is communicated with the output end of the slag avoiding device 31, and after the slag avoiding device 31 separates the liquid slag, the liquid slag flows to the slag runner 33.
Keep away sediment ware 31 can be with the separation of molten iron and liquid slag, and the molten iron flow direction is molten iron ditch 32, and liquid slag flow direction is to slag runner 33, and the later stage of being convenient for carries out classification. Specifically, the slag avoiding device 31 is communicated with the discharge hole 6 through a ditch.
The utility model discloses a tapping mode is different with blast furnace deironing mode, the utility model discloses a tapping hole or discharge gate 6 are in normally open state during rectangular shape smelting furnace normal production, and tapping, slag discharging in succession, molten iron and sediment flow out from rectangular shape smelting furnace discharge gate 6 in succession, get into and keep away sediment ware 31, reentrant iron runner 32, realize the separation of slag and iron through keeping away sediment ware 31, the molten iron gets into iron runner 32, and liquid furnace slag gets into slag runner 33, and liquid furnace slag flows into the slag bath after the shrend is handled.
The above operation mode of discharging the material output from the furnace body 11 belongs to the prior art, and the specific operation mode is the operation in the prior art, which is not described herein again, and the setting position of the discharge port 6 is located immediately below the ground and immediately adjacent to the ground.
Referring to fig. 1 to 4, the monitoring mechanism 4 includes a temperature monitor 41 and an imager 42, the temperature monitor 41 is disposed at the top of the inner side of the smelting furnace 1 for monitoring the temperature in the smelting furnace 1; the imager 42 is arranged at the top of the inner side of the smelting furnace 1 and is used for collecting images in the reaction process in the smelting furnace 1. Through infrared imaging appearance 42, can be regularly or regularly shoot the image in the smelting furnace 1 inside reaction process, through the continuity of image to the staff observes reaction process etc. and is specific, for dismantling the connection between infrared imaging appearance 42 and the smelting furnace 1.
Referring to fig. 1 to 4, the smelting furnace 1 includes a furnace body 11, a high-temperature air pipe 12 and a waste gas outlet pipe 13, the lower part of the furnace body 11 is buried underground, and the upper part is located on the ground; the high-temperature air pipes 12 are arranged on two sides of the smelting furnace 1, communicated into the smelting furnace 1 and communicated with a high-temperature air source, and used for conveying high-temperature air into the smelting furnace 1 through the high-temperature air pipes 12; waste gas exit tube 13 is a plurality of, all locates 1 upper ends of smelting furnace and communicates to in the smelting furnace 1, and the waste gas that produces in the smelting furnace 1 passes through waste gas exit tube 13 and gets into waste gas waste heat recovery system, and discharge to reach standard after cooling, dust removal. Because the furnace body 11 is arranged obliquely, materials can flow freely in the furnace body 11, expected products can be produced after reaction, and compared with blast furnace operation, gas ash can be fully smelted.
In this embodiment, high temperature air is blown into the furnace body 11 through the high temperature air pipe 12, oxygen is contained in the air, the reaction of the material can be accelerated, the high temperature air has a certain pressure, the high temperature air is input into the furnace body 11 through the high temperature air pipe 12, the function of combustion-supporting and preheating of the air in the furnace body 11 can be achieved, and the gas generated in the reaction in the furnace body 11 can be discharged from the waste gas outlet pipe 13.
As a specific implementation manner of the zinc-containing blast furnace gas ash smelting device provided by the present invention, please refer to fig. 1 to 4, the smelting furnace 1 is sequentially divided into a reaction zone 111, a transition zone 112 and a slag-iron separation zone 113 along the direction from the feeding port 5 to the discharging port 6, the bottom of the reaction zone 111 is disposed under the ground and has a long-strip groove structure, the material entering into the smelting furnace 1 reacts in the reaction zone 111, and the feeding port 5 is located at the feeding end of the reaction zone 111; the bottom of the transition area 112 is arranged under the ground and is in a curved arc groove type structure, and the material in the reaction area 111 flows into the transition area 112; the bottom of the slag-iron separation zone 113 is arranged under the ground and is in a long-strip groove-shaped structure, molten iron and slag generated in the reaction flow to the slag-iron separation zone 113 through the transition zone 112, the slag and the iron are separated in the slag-iron separation zone 113, the discharge port 6 is positioned at the discharge end of the slag-iron separation zone 113, and the two ends of the transition zone 112 are respectively in arc transition connection with the reaction zone 111 and the slag-iron separation zone 113.
The bottom of the reaction zone 111, the transition zone 112 and the slag-iron separation zone 113 is provided with a groove structure, which is convenient for the reaction and flow of the material, the furnace body 11 belongs to the smelting furnace 1 in the prior art, and has various functions of the smelting furnace 1 in the prior art, so that the details are not repeated herein.
Specifically, 80% of the smelting reaction progress is completed in the reactor, 20% of the smelting reaction progress and part of the slag-iron separation function are completed in the transition zone 112, and the separation of slag and iron and other metals is completed in the slag-iron separation zone 113.
The width of the reaction zone 111 is 3 meters, the total length is 7-8 meters, the dry balls enter the furnace body 11 from the feeding hole 5, the dry balls flow to the transition zone 112 and the slag-iron separation zone 113 while reacting, and 80% of smelting reaction progress is completed in the reaction zone 111; the slag-iron separation zone 113 has a width of 1 meter and a total length of 5-6 meters, and is used for separating high boiling point metals such as smelted iron and slag by gravity, and evaporating and separating low boiling point metals such as smelted zinc and the like from the slag; the transition zone 112 is a connecting area of the reaction zone 111 and the slag-iron separation zone 113, is of a curved-arc groove-shaped structure, realizes a transition function, the width of the transition zone 112 is changed from wide to narrow, and the transition zone 112 bears 20% of smelting reaction progress and part of slag-iron separation function. There is no clear boundary between the reaction zone 111 and the transition zone 112, nor between the transition zone 112 and the slag iron separation zone 113, which is dependent on operating conditions, throughput, dry-ball metallurgical properties, etc.
Capacity of the smelting furnace 1: dry balls containing 25-40% of carbon and 35-45% of iron (after carbon is subtracted, the content of pure iron) 15-25 t/h.
As a specific embodiment of the blast furnace gas ash smelting device containing zinc provided by the present invention, please refer to fig. 1 to 4, the reaction zone 111, the transition zone 112 and the slag-iron separation zone 113 buried underground are all of a trough structure, the arch structure leaking out of the reaction zone 111, the transition zone 112 and the slag-iron separation zone 113 on the ground is adapted to the trough structure, and the arch structure and the trough structure are mutually butted and fastened to form an integral body and the inside is hollow.
For the sake of safety, the furnace body 11 is divided into an upper part and a lower part, i.e. an overground part and an underground part, the interior of the furnace body 11 is hollow, under normal operation, the highest liquid level of slag is at a position 200-400mm below the ground level, and the arch structure and the groove structure (the upper part and the lower part) of the furnace body 11 are covered and buckled together to form a whole body for the gas ash to react in the interior of the furnace body 11.
The width of the reaction zone 111 is 2-3 times the width of the slag iron separation zone 113. In this embodiment, the ratio of the width of the reaction zone 111 to the width of the slag-iron separation zone 113 is more than 2 times, which can satisfy the smelting requirement of the furnace body 11 for the gas ash, and therefore, the present invention is within the protection scope.
As a specific implementation manner of the zinc-containing blast furnace gas ash smelting device provided by the utility model, please refer to fig. 1 to 4, the feed inlet 5 is provided with the oxygen pumping component 7 for pumping oxygen into the smelting furnace 1, and the 11 air of furnace body obtains combustion-supporting preheating after the pumping oxygen, so that the 11 internal temperature of furnace body maintains balance. Oxygen is conveyed into the furnace body 11 through the high-temperature air pipe 12, so that combustion-supporting preheating of air in the furnace body 11 is facilitated, and the temperature of the air in the furnace body 11 is kept constant. The oxygen pumping assembly 7 comprises an oxygen conveying pipeline communicated with the oxygen source and the feed port 5, an air pump arranged on the oxygen conveying pipeline and an air valve arranged on the oxygen conveying pipeline and positioned between the air pump and the feed port 5. Oxygen is conveyed to the interior of the furnace body 11 through the conveying pipeline, so that combustion-supporting preheating of air in the furnace body 11 is facilitated, and the air in the furnace body 11 is kept constant.
The number of the high-temperature air pipes 12 is 3-10, and the heat quantity needing to be supplemented in the reaction zone 111 is the largest, especially in the inlet area of the dry balls, so that the number of the high-temperature air pipes 12 is the largest on the side of the feed inlet 5 of the dry balls, and the high-temperature air pipes are matched with the oxygen pumping assembly 7 to operate, so that oxygen and high-temperature hot air can be supplemented into the furnace body 11, the temperature in the furnace body 11 is kept stable, and the high-temperature air pipes are used for ensuring that the side of the feed inlet 5 of the dry balls has the temperature of 1400-1700 ℃; in addition, the number of the waste gas outlet pipes 13 is 2-5, and the waste gas outlet pipes are uniformly distributed at the top of the furnace body 11.
As a specific embodiment of the zinc-containing blast furnace gas ash smelting device provided by the present invention, please refer to fig. 1 to 4, the feed inlet 5 is located at the end of the smelting furnace 1 with shallow burial depth, and the discharge outlet 6 is located at the end of the smelting furnace 1 with deep burial depth. The furnace body 11 is obliquely arranged on the ground, so that materials in the furnace body 11 can move from the feed port 5 to the discharge port 6 in the reaction process, and can become slag and molten iron when the materials move to the discharge port 6, and the slag and the molten iron are conveniently separated.
As a specific embodiment of the zinc-containing blast furnace gas ash smelting device provided by the utility model, please refer to fig. 1 to 4, the smelting furnace 1 comprises a shell made of a thick steel plate and refractory bricks laid on the inner wall of the shell, and the shell is hollow and can be used for smelting operation. The outer shell of the smelting furnace 1 is made of high-temperature-resistant manganese steel plates, and is lined with refractory materials.
The reaction of the gas ash in the furnace body 11 can be realized only by a certain theoretical support, or can be understood as the working principle of the smelting furnace 1:
the groove structure of the reaction zone 111 is to ensure that the dry balls with the particle size of 30mm-80mm stay in the furnace body 11 for 7-14 minutes, the dry balls are subjected to redox reaction under the condition of isolating air below a slag layer, the dry balls are subjected to surface reaction preferentially at high temperature, the interior of the dry balls also starts to react along with the rise of the temperature in the balls and a certain raised temperature, carbon is gradually lost in the reaction process, holes are formed on the surfaces and the interior of the balls, and a large amount of CO and CO2 gas generated by the reaction accelerates the breakage of the dry balls, so that a violent stirring effect can be generated on the slag layer, the slag is in a boiling state, the iron oxide is gradually reduced into ferrous oxide and iron, the reduction of the iron oxide along with the loss of the carbon is realized, the specific gravity of the broken small balls is larger and larger, the reaction speed is high, and most of the dry balls can be reduced within minutes.
The specific gravity of high boiling point metals such as smelted molten iron is far greater than that of slag, the high boiling point metals such as the smelted molten iron are separated from the slag by virtue of gravity, a certain separation time is also needed, the separation time is controlled according to the retention time of 2-4 minutes, and the slag-iron separation is started in the reaction zone 111 and the transition zone 112, so that the design time of the slag-iron separation zone 113 is short; the iron wrapped in the slag is slightly disturbed to a certain extent, which is beneficial to slag-iron separation, so that the width of the slag-iron separation zone 113 is properly reduced, and the proper disturbance degree of the slag can be improved.
The low boiling point metals such as zinc and the like are evaporated into gas in the slag and separated from the slag.
The utility model is suitable for a smelt the iron content solid waste material of low boiling point metal such as zinciferous, remedied the unsuitable defect of smelting solid iron content waste material such as zinciferous of blast furnace, belong to a supplementary technique of blast furnace smelting technique.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Zinc-containing blast furnace gas ash smelting device is characterized by comprising:
the smelting furnace is in a strip shape, the lower part of the smelting furnace is buried under the ground, an included angle is formed between the bottom surface of the smelting furnace and the horizontal plane, a feeding hole and a discharging hole are formed in two ends of the smelting furnace respectively, and the smelting furnace is used for smelting zinc-containing gas ash and producing molten iron and a zinc oxide crude product;
the feeding mechanism is arranged at the feeding port and used for conveying the blast furnace gas ash dry balls into the smelting furnace;
the discharging mechanism is arranged at the discharging opening and is used for receiving the molten iron and the liquid slag output from the smelting furnace; and
and the monitoring mechanism is arranged at the top of the inner side of the smelting furnace and used for monitoring the temperature and the material reaction process in the smelting furnace.
2. The blast furnace gas ash smelting plant containing zinc of claim 1, wherein the feeding mechanism comprises:
the weighing platform is used for weighing the weight of the gas ash to be fed into the smelting furnace;
the storage bin is used for storing the gas ash dry balls, and the weighed gas ash dry balls are placed in the storage bin for temporary storage; and
and the feeding pipeline is obliquely arranged, one end of the feeding pipeline is communicated with the storage bin, the other end of the feeding pipeline is connected with the feeding port, and the gas ash dry balls in the storage bin are conveyed into the smelting furnace through the feeding pipeline.
3. The blast furnace gas ash smelting plant containing zinc of claim 1, wherein the discharging mechanism comprises:
the slag avoiding device is communicated with the discharge hole and is used for receiving the output molten iron and the liquid slag, and the slag avoiding device is used for separating the molten iron and the liquid slag;
the molten iron ditch is communicated with the output end of the slag avoiding device, and the molten iron flows to the molten iron ditch after being separated by the slag avoiding device; and
and the slag runner is communicated with the output end of the slag avoiding device, and after the slag avoiding device separates the liquid slag, the liquid slag flows to the slag runner.
4. The zinc-bearing blast furnace gas ash smelting plant of claim 1, wherein the monitoring mechanism comprises:
the temperature monitor is arranged at the top of the inner side of the smelting furnace and used for monitoring the temperature in the smelting furnace; and
and the imager is arranged at the top of the inner side of the smelting furnace and used for acquiring images in the reaction process in the smelting furnace.
5. The zinc-bearing blast furnace gas ash smelting plant of claim 1, wherein the smelting furnace comprises:
the lower part of the furnace body is buried under the ground, and the upper part of the furnace body is positioned on the ground;
the high-temperature air pipes are arranged on two sides of the smelting furnace, communicated into the smelting furnace and communicated with a high-temperature air source, and the high-temperature air source conveys high-temperature air into the smelting furnace through the high-temperature air pipes; and
the waste gas exit tube is a plurality of, all locates smelting furnace upper end and intercommunication to in the smelting furnace, the waste gas that produces in the smelting furnace passes through the waste gas exit tube gets into waste gas waste heat recovery system, discharges up to standard after cooling, dust removal.
6. The blast furnace gas ash smelting plant containing zinc of claim 5, wherein the smelting furnace is divided into, in order along the direction from the feed inlet to the discharge outlet:
the bottom of the reaction zone is arranged below the ground and is of a long-strip groove-shaped structure, materials entering the smelting furnace react in the reaction zone, and the feed inlet is positioned at the feed end of the reaction zone;
the bottom of the transition zone is arranged under the ground and is in a curved arc groove type structure, and the materials in the reaction zone flow into the transition zone; and
the slag-iron separation area, the bottom is arranged in the ground and is rectangular cell type structure, and the molten iron and the sediment that produce in the reaction pass through the transition zone flow extremely the slag-iron separation area slag and iron separation in the slag-iron separation area, the discharge gate is located the discharge end of slag-iron separation area, the transition zone both ends circular arc transition respectively accept the reaction zone with the slag-iron separation area.
7. The blast furnace gas ash smelting device containing zinc according to claim 6, wherein the reaction zone, the transition zone and the slag-iron separation zone buried underground are all of a trough-type structure, the reaction zone, the transition zone and the slag-iron separation zone leaked out of the ground are arch-shaped structures matched with the trough-type structure, the arch-shaped structures and the trough-type structures are mutually butted and buckled to form a whole, and the interior of the arch-shaped structures and the trough-type structures is hollow.
8. The blast furnace gas ash containing zinc smelting plant of claim 5, wherein the feed inlet is provided with an oxygen pumping assembly for pumping oxygen into the smelting furnace.
9. The blast furnace gas ash smelting plant containing zinc according to claim 6, wherein the feed inlet is located at an end of the smelting furnace where the burial depth is shallow, and the discharge outlet is located at an end of the smelting furnace where the burial depth is deep.
10. The blast furnace gas ash smelting unit containing zinc according to claim 1, wherein the smelting furnace includes a shell made of a thick steel plate and refractory bricks laid on an inner wall of the shell, and the interior of the shell is hollow.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112143911A (en) * | 2020-10-09 | 2020-12-29 | 新兴铸管股份有限公司 | Zinc-containing blast furnace gas ash smelting device and smelting method |
| CN112143911B (en) * | 2020-10-09 | 2023-12-26 | 新兴铸管股份有限公司 | Zinc-containing blast furnace gas ash smelting device and smelting method |
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