CN214830581U - Electric furnace method crude zinc recovery system of zinc-containing smoke dust of steel plant - Google Patents
Electric furnace method crude zinc recovery system of zinc-containing smoke dust of steel plant Download PDFInfo
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- CN214830581U CN214830581U CN202121052115.7U CN202121052115U CN214830581U CN 214830581 U CN214830581 U CN 214830581U CN 202121052115 U CN202121052115 U CN 202121052115U CN 214830581 U CN214830581 U CN 214830581U
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Abstract
The utility model discloses a crude zinc recovery system of electric furnace method of zinc-containing smoke and dust of steel mill, including smoke and dust conveyer and screening machine, the tip of screening machine coarse fodder export is provided with the rubbing crusher, the bin outlet of rubbing crusher and the thin material exit linkage of screening machine have the granulator, the discharge gate of granulator is connected with the drying-machine, the discharge gate of drying-machine is connected with the aggregate storage tank, one side of aggregate storage tank is provided with solvent storage tank and carbonaceous reductant storage tank, the aggregate storage tank, the bottom of solvent storage tank and carbonaceous reductant storage tank all is provided with first screw conveyer, be provided with the agitator in the blending tank, the lopsidedness of blending tank is provided with second screw conveyer, second screw conveyer's discharge end is connected with the electric stove, the upper portion of electric stove is provided with the formula condenser that splashes, the zinc liquid exit linkage of formula condenser that splashes has the pouring device. The utility model has the advantages of high recovery rate of zinc, less impurity content in crude zinc, good production benefit, and significant economic and social values.
Description
Technical Field
The utility model relates to a steel mill smoke and dust processing technology field, concretely relates to electric furnace method crude zinc recovery system of zinc-containing smoke and dust of steel mill.
Background
At present, smoke dust (including blast furnace smoke dust, converter smoke dust and electric furnace smoke dust) from a steel plant is increased, 35-90 kg of smoke dust is generated every ton of steel and iron produced, most of the smoke dust contains zinc, iron, lead, potassium, sodium and other substances, and generally, the smoke dust is recycled in the steel plant as a sintering raw material, but with the increase of the cycle times, elements such as zinc, iron, lead and the like are continuously enriched, so that negative effects are brought to the operation of the blast furnace, particularly, the zinc loading in the furnace is higher and higher due to the enrichment of zinc, and the normal operation of the blast furnace is seriously affected, so that a plurality of manufacturers can treat the smoke dust in a stacking mode at present, a large amount of land is occupied, the surrounding environment is polluted, and meanwhile, zinc, iron and other resources in the smoke dust are wasted.
Zinc is the most important element in the zinc-containing smoke dust of a steel plant, at present, a rotary hearth furnace dezincification process is adopted for a mature method of the zinc-containing smoke dust, the principle is that the zinc oxide is reduced under the high-temperature reduction condition by utilizing the characteristic of low boiling point of zinc, and is gasified and volatilized into zinc steam, the zinc steam is discharged along with smoke gas, so that zinc is separated from a solid phase, the zinc steam is oxidized into oxide particles, and the oxide particles are collected in a smoke gas treatment system together with the smoke dust, the crude zinc powder recovered by using the process has high impurity content, the recovery rate and the grade of the zinc are low, the production benefit of an enterprise is low, and the requirement of the enterprise on zinc element recycling can not be well met. Therefore, it is objectively needed to develop an electric furnace method crude zinc recovery system for zinc-containing smoke dust in a steel plant, which has high zinc recovery rate, low impurity content in crude zinc and good production benefit.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a zinc rate of recovery is high, and impurity content is few in the crude zinc, the zinciferous smoke and dust's of steel mill crude zinc recovery system of electric furnace method of production benefit.
The utility model aims at realizing the method, which comprises a smoke conveyer and a sieving machine, wherein the top of the sieving machine is provided with a feed inlet, the bottom of the sieving machine is provided with a fine material outlet, the discharge end of the smoke conveyer is positioned above the feed inlet, the sieving machine is internally and obliquely provided with a vibrating screen, the feed inlet is positioned above the higher end of the vibrating screen, the side wall of the sieving machine above the lower end of the vibrating screen is provided with a coarse material outlet, the end part of the coarse material outlet is provided with a crusher, the discharge port of the crusher and the fine material outlet of the sieving machine are connected with a granulator, the discharge port of the granulator is connected with a dryer, the discharge port of the dryer is connected with a granular material storage tank, one side of the granular material storage tank is provided with a solvent storage tank and a reducing agent storage tank, the bottoms of the granular material storage tank, the solvent storage tank and the carbonaceous reducing agent storage tank are all provided with a first spiral conveyer, the discharge port of the first spiral conveyer is provided with a mixing tank, be provided with the agitator in the blending tank, the bottom slope setting of blending tank, the lopsidedness of blending tank is provided with second screw conveyer, the lower one end of blending tank is through arranging the pan feeding mouth intercommunication of material pipe with second screw conveyer, the discharge end of second screw conveyer is connected with the electric stove, the upper portion of electric stove is provided with the gas vent, be connected with splash condenser on the gas vent, splash condenser's zinc liquid exit linkage has the pouring device, splash condenser's gas outlet is connected with two cold washers, be provided with gaseous phase export and liquid phase export on the two cold washers, liquid phase export has connected gradually sedimentation filter tank and blue powder jar.
Furthermore, the screening machine, the pulverizer, the granulator and the dryer are all provided with dust exhaust pipes, the dust exhaust pipes are provided with fans, and the end parts of the dust exhaust pipes are provided with dust collectors.
Further, the outer wall of the mixing tank is provided with a jacket, the bottom of the jacket is provided with an air inlet pipe, and the top of the jacket is provided with an air outlet pipe.
Further, a gas delivery pipe is arranged on the gas phase outlet, and the gas outlet end of the gas delivery pipe is communicated with the gas inlet pipe.
Further, a carbon monoxide detector is arranged at the top of the mixing tank.
Further, a spiral guide plate is arranged in the jacket.
The utility model discloses when moving, the zinciferous smoke and dust that the steel mill produced send to the screening machine in through the smoke and dust conveyer, zinciferous smoke and dust sieves in the screening machine, the tiny fine ash of granule directly gets into the granulator after passing the sieve mesh of shale shaker, and the great cubic smoke and dust of granule gets into the rubbing crusher and smashes, reentry the granulator after smashing, the smoke and dust is pelletized in the granulator, dry through the drying-machine after the granulation, it is reserve to get into the aggregate storage tank afterwards, simultaneously, quick lime or other solvents are packed into in the solvent storage tank, coke is packed into in carbonaceous reductant storage tank, three kinds of raw materials are sent into the blending tank according to the proportion through first screw conveyer, three kinds of raw materials carry out the intensive mixing through the agitator in the blending tank, send into the electric stove through the second screw conveyer after the misce bene and smelt, in the high temperature smelting process, zinc gasification forms zinc steam, generate a large amount of carbon monoxide simultaneously, discharging the mixed gas out of the electric furnace, then feeding the mixed gas into a splash type condenser, discharging the produced liquid zinc into a pouring device to obtain crude zinc ingots, discharging the residual gas into a secondary cooling scrubber, and precipitating and filtering to obtain blue powder and carbon monoxide gas. In the process, zinc-containing smoke dust of a steel plant is screened, crushed, granulated and dried, so that the zinc smelting of an electric furnace is smoothly carried out, the recovery rate of zinc can be improved, the obtained crude zinc ingot is high in purity and low in impurity content, and production enterprises can obtain good production benefits. The utility model has the advantages of high recovery rate of zinc, less impurity content in crude zinc, good production benefit, and significant economic and social values.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
in the figure: 1-a smoke dust conveyor, 2-a sieving machine, 3-a feed inlet, 4-a fine material outlet, 5-a vibrating screen, 6-a pulverizer, 7-a granulator, 8-a dryer, 9-a granule storage tank, 10-a solvent storage tank, 11-a carbonaceous reducing agent storage tank, 12-a first screw conveyor, 13-a mixing tank, 14-a stirrer, 15-a second screw conveyor, 16-an electric furnace, 17-an exhaust port, 18-a splash condenser, 19-a pouring device, 20-a second cold washer, 21-a gas phase outlet, 22-a liquid phase outlet, 23-a precipitation filtering tank, 24-a blue powder tank, 25-a dust exhaust pipe, 26-a fan, 27-a dust remover, 28-a jacket, 29-an air inlet pipe and 30-an air outlet pipe, 31-gas pipe, 32-carbon monoxide detector, 33-spiral guide plate.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited in any way, and any changes or improvements based on the present invention are all within the protection scope of the present invention.
As shown in figure 1, the utility model comprises a smoke dust conveyor 1 and a screening machine 2, the smoke dust conveyor 1 is the existing equipment, the function is to convey the zinc-containing smoke dust into the screening machine 2, a belt conveyor or other conveyors convenient for conveying the smoke dust can be used, the top of the screening machine 2 is provided with a feed inlet 3, the bottom is provided with a fine material outlet 4, the discharge end of the smoke dust conveyor 1 is positioned above the feed inlet 3, the interior of the screening machine 2 is obliquely provided with a vibrating screen 5, the feed inlet 3 is positioned above the higher end of the vibrating screen 5, the side wall of the screening machine 2 above the lower end of the vibrating screen 5 is provided with a coarse material outlet, the end part of the coarse material outlet is provided with a pulverizer 6, the discharge port of the pulverizer 6 and the fine material outlet 4 of the screening machine 2 are connected with a granulator 7, the discharge port of the granulator 7 is connected with a dryer 8, the discharge port of the dryer 8 is connected with a granule storage tank 9, a solvent storage tank 10 and a carbonaceous reducing agent storage tank 11 are arranged on one side of the granular material storage tank 9, a first screw conveyor 12 is arranged at the bottom of each of the granular material storage tank 9, the solvent storage tank 10 and the carbonaceous reducing agent storage tank 11, a mixing tank 13 is arranged at a discharge port of the first screw conveyor 12, a stirrer 14 is arranged in the mixing tank 13, the stirrer 14 is of a conventional structure and is used for stirring and mixing materials in the mixing tank 13, the bottom of the mixing tank 13 is obliquely arranged, a second screw conveyor 15 is obliquely arranged on one side of the mixing tank 13, the lower end of the mixing tank 13 is communicated with a feed port of the second screw conveyor 15 through a discharge pipe, the discharge end of the second screw conveyor 15 is connected with an electric furnace 16, the electric furnace 16 is conventional equipment, various raw materials such as smoke, zinc and the like are subjected to reduction volatilization smelting in a circuit 16, zinc in the zinc steam is formed, and other materials with higher melting points form slag, an exhaust port 17 is arranged at the upper part of the electric furnace 16, a splash condenser 18 is connected on the exhaust port 17, the splash condenser 18 is an existing device and is used for cooling zinc steam and adsorbing zinc in the zinc steam through liquid zinc, a zinc liquid outlet of the splash condenser 18 is connected with a pouring device 19, the pouring device 19 is an existing device and is used for pouring liquid zinc to obtain a crude zinc ingot, a gas outlet of the splash condenser 18 is connected with a secondary cooling scrubber 20, the secondary cooling scrubber 20 is of an existing structure and is used for further cooling the zinc steam and separating the zinc in the zinc steam, a gas phase outlet 21 and a liquid phase outlet 22 are arranged on the secondary cooling scrubber 20, the liquid phase outlet 22 is sequentially connected with a precipitation filtering pool 23 and a blue powder tank 24, the gas discharged from the electric furnace 16 is a mixed gas of carbon monoxide and zinc steam, and the zinc therein is sequentially separated, the remaining carbon monoxide gas is discharged from the gas phase outlet 21, and water and blue powder are discharged from the liquid phase outlet 22.
The utility model discloses when moving, the zinciferous smoke and dust that the steel mill produced send to the screening machine 2 in through smoke and dust conveyer 1, zinciferous smoke and dust sieves in screening machine 2, the less fine ash of granule directly gets into granulator 7 after passing the sieve mesh of shale shaker 5, and the great cubic smoke and dust of granule then gets into rubbing crusher 6 and smashes, reentry granulator 7 after smashing, the smoke and dust is pelletized in granulator 7, dry through drying-machine 8 after the granulation, get into aggregate storage tank 9 subsequently for subsequent use, simultaneously, quick lime or other solvents are packed into in solvent storage tank 10, coke is packed into in carbonaceous reducing agent storage tank 11, three kinds of raw materials are sent into blending tank 13 through first screw conveyer 12 according to a proportion, three kinds of raw materials carry out the intensive mixing through agitator 14 in blending tank 13, send into electric stove 16 through second screw conveyer 15 after the misce bene, in the high temperature melting process, zinc is gasified to form zinc steam, a large amount of carbon monoxide is generated at the same time, mixed gas is discharged out of an electric furnace 16 and then enters a splash type condenser 18, liquid zinc is generated and discharged into a pouring device 19 to obtain a crude zinc ingot, the rest gas is discharged into a secondary cooling washer 20, blue powder and carbon monoxide gas are obtained after precipitation and filtration, the blue powder still contains a certain amount of zinc, and in order to avoid waste, the blue powder can be returned to a granulator 7 for granulation and participates in the recovery of crude zinc in the system again. In the process, zinc-containing smoke dust of a steel plant is screened, crushed, granulated and dried, so that the zinc smelting of the electric furnace 16 is smoothly carried out, the recovery rate of zinc can be improved, the obtained crude zinc ingot is high in purity and low in impurity content, and production enterprises can obtain good production benefits.
The screening machine 2, the crushing machine 6, the granulating machine 7 and the drying machine 8 are all provided with dust exhaust pipes 25, the dust exhaust pipes 25 are provided with fans 26, the end parts of the dust exhaust pipes 25 are provided with dust collectors 27, the crushing machine 6, the granulating machine 7 and the drying machine 8 are the existing equipment, and respectively complete the crushing, granulating and drying operations of smoke dust, while the sieving machine 2, the crushing machine 6, the granulating machine 7 and the drying machine 8 can generate dust when in operation, in order to prevent the dust from diffusing to cause environmental pollution, under the action of the fan 26, the dust is led into the dust remover 27 through the dust exhaust pipe 25, the dust remover 27 is the existing equipment and can remove dust, and the dust collected by the dust collector 27 is practically recyclable, so that in the actual production process, the dust collected by the dust collector 27 can be returned to the granulator 7 for granulation, so that the dust is prevented from being treated and wasted.
The outer wall of the mixing tank 13 is provided with a jacket 28, the bottom of the jacket 28 is provided with an air inlet pipe 29, the top of the jacket 28 is provided with an air outlet pipe 30, when in operation, hot air is introduced from the air inlet pipe 29, the hot air gives off heat when flowing in the jacket 28, and raw materials in the mixing tank 13 can absorb the heat to improve the temperature of the raw materials and preheat the raw materials, so that the melting and gasification time of the raw materials in the electric furnace 16 is shortened, and the melting efficiency of the electric furnace 16 is improved.
Be provided with gas-supply pipe 31 on the gas phase export 21, the end of giving vent to anger and intake pipe 29 intercommunication of gas-supply pipe 31, the gas of gas phase export 21 combustion gas is carbon monoxide gas, and carbon monoxide gas still has higher temperature, carries it to the intake pipe 29 of pressing from both sides cover 28 through gas-supply pipe 31, can utilize the gaseous waste heat of carbon monoxide, the waste of reduction energy also can preheat the raw materials in the blending tank 13, shortens raw materials melting and gasification time in electric stove 16, thereby improves the utility model discloses a work efficiency.
The top in the blending tank 13 is provided with carbon monoxide detector 32, and carbon monoxide detector 32 is current instrument, and its effect is the concentration of real-time detection carbon monoxide, because carbon monoxide gas belongs to explosive toxic gas, when taking place to leak, can arouse explosion and conflagration, also can lead to personnel's poisoning, consequently, the top in blending tank 13 is provided with carbon monoxide detector 32, can in time discover when the carbon monoxide in the jacket 28 leaks in the blending tank 13, improves the security performance of blending tank 13.
The spiral guide plate 33 is arranged in the jacket 28, the spiral guide plate 33 plays a guiding role, so that the airflow can be in a spiral flowing state in the jacket 28, the flowing distance of the airflow in the jacket 28 is greatly increased, the retention time of the airflow in the jacket 28 is prolonged, secondly, the uniformity of the distribution of the airflow in the jacket 28 can be ensured by the arrangement of the spiral guide plate 33, and an area where the airflow is retained in the jacket 28 is prevented.
Claims (6)
1. The utility model provides an electric furnace method crude zinc recovery system of zinc-containing smoke and dust of steel mill which characterized in that: comprises a smoke conveyer (1) and a screening machine (2), wherein the top of the screening machine (2) is provided with a feed inlet (3), the bottom of the screening machine is provided with a fine material outlet (4), the discharge end of the smoke conveyer (1) is positioned above the feed inlet (3), a vibrating screen (5) is obliquely arranged in the screening machine (2), the feed inlet (3) is positioned above the higher end of the vibrating screen (5), the side wall of the screening machine (2) above the lower end of the vibrating screen (5) is provided with a coarse material outlet, the end part of the coarse material outlet is provided with a crushing machine (6), the discharge port of the crushing machine (6) and the fine material outlet (4) of the screening machine (2) are connected with a granulating machine (7), the discharge port of the granulating machine (7) is connected with a drying machine (8), the discharge port of the drying machine (8) is connected with a granular material storage tank (9), one side of the granular material storage tank (9) is provided with a solvent storage tank (10) and a reducing agent storage tank (11), the bottom of the aggregate storage tank (9), the bottom of the solvent storage tank (10) and the bottom of the carbonaceous reducing agent storage tank (11) are respectively provided with a first spiral conveyer (12), a discharge port of the first spiral conveyer (12) is provided with a mixing tank (13), a stirrer (14) is arranged in the mixing tank (13), the bottom of the mixing tank (13) is obliquely arranged, one side of the mixing tank (13) is obliquely provided with a second spiral conveyer (15), the lower end of the mixing tank (13) is communicated with a feeding port of the second spiral conveyer (15) through a discharge pipe, the discharge end of the second spiral conveyer (15) is connected with an electric furnace (16), the upper part of the electric furnace (16) is provided with an exhaust port (17), the exhaust port (17) is connected with a splash condenser (18), a zinc liquid outlet of the splash condenser (18) is connected with a pouring device (19), and an air outlet of the splash condenser (18) is connected with a secondary cooling washer (20), the secondary cooling scrubber (20) is provided with a gas phase outlet (21) and a liquid phase outlet (22), and the liquid phase outlet (22) is sequentially connected with a precipitation filter tank (23) and a blue powder tank (24).
2. The electric furnace method crude zinc recovery system for zinc-containing smoke dust of a steel plant according to claim 1, wherein the screening machine (2), the crushing machine (6), the granulating machine (7) and the drying machine (8) are all provided with dust exhaust pipes (25), the dust exhaust pipes (25) are provided with fans (26), and the end parts of the dust exhaust pipes (25) are provided with dust collectors (27).
3. The electric furnace crude zinc recovery system for zinc-containing flue dust in a steel plant according to claim 1, characterized in that a jacket (28) is arranged on the outer wall of the mixing tank (13), an air inlet pipe (29) is arranged at the bottom of the jacket (28), and an air outlet pipe (30) is arranged at the top.
4. The electric furnace crude zinc recovery system for zinc-containing smoke dust in a steel plant according to claim 3, wherein a gas conveying pipe (31) is arranged on the gas phase outlet (21), and the gas outlet end of the gas conveying pipe (31) is communicated with the gas inlet pipe (29).
5. The electric furnace crude zinc recovery system for zinc-containing flue dust in steel plants according to claim 4, characterized in that a carbon monoxide detector (32) is arranged at the top in the mixing tank (13).
6. The electric furnace method crude zinc recovery system for zinc-containing flue dust in steel plants according to claim 3, characterized in that a spiral guide plate (33) is arranged in the jacket (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121052115.7U CN214830581U (en) | 2021-05-17 | 2021-05-17 | Electric furnace method crude zinc recovery system of zinc-containing smoke dust of steel plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121052115.7U CN214830581U (en) | 2021-05-17 | 2021-05-17 | Electric furnace method crude zinc recovery system of zinc-containing smoke dust of steel plant |
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| CN214830581U true CN214830581U (en) | 2021-11-23 |
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| CN202121052115.7U Active CN214830581U (en) | 2021-05-17 | 2021-05-17 | Electric furnace method crude zinc recovery system of zinc-containing smoke dust of steel plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115999728A (en) * | 2023-02-22 | 2023-04-25 | 江苏天诚锌业科技有限公司 | Zinc powder processing equipment with feeding structure |
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2021
- 2021-05-17 CN CN202121052115.7U patent/CN214830581U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115999728A (en) * | 2023-02-22 | 2023-04-25 | 江苏天诚锌业科技有限公司 | Zinc powder processing equipment with feeding structure |
| CN115999728B (en) * | 2023-02-22 | 2023-10-13 | 江苏天诚锌业科技有限公司 | Zinc powder processing equipment with feeding structure |
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