CN217397852U - Anhydrous manganese chloride particle adding system in manganese-containing magnesium alloy production - Google Patents
Anhydrous manganese chloride particle adding system in manganese-containing magnesium alloy production Download PDFInfo
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- CN217397852U CN217397852U CN202221455841.8U CN202221455841U CN217397852U CN 217397852 U CN217397852 U CN 217397852U CN 202221455841 U CN202221455841 U CN 202221455841U CN 217397852 U CN217397852 U CN 217397852U
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Abstract
The utility model discloses an anhydrous manganese chloride granule addition system in manganese-containing magnesium alloy production, this system mainly comprises anhydrous manganese chloride granule storage tank, pressure feed tank, dust collector one, magnesium alloy smelting furnace, dust collector two, tail gas scrubber and dry air buffer tank to form a more professional and normative anhydrous manganese chloride granule addition and flue gas purification integrated system in manganese-containing magnesium alloy production from this, the operation mode that will see traditional unit and take charge of, the manual operation is main develops into the automated production of systematized centralized control, be favorable to producing high-purity, homogeneity and fine grain high-quality alloy product; the recovery rate of the anhydrous manganese chloride particles can be improved, and the production cost of the alloy is reduced; can ensure that the on-site industrial sanitary conditions and the tail gas emission reach the dual standards; has important significance for promoting the technical progress and the high-quality development of the magnesium alloy production industry.
Description
Technical Field
The utility model relates to a magnesium alloy production technical field, concretely relates to anhydrous manganese chloride granule addition system in manganese-containing magnesium alloy production.
Background
Currently, there are 4 series of commonly used magnesium alloys: AZ (Mg-Al-Zn-Mn), AM (Mg-Al-Mn), AS (Mg-Al-Si), AE (Mg-Al-RE). Among them, AZ-based and AM-based magnesium alloys are currently the most widely used commercial manganese-containing cast magnesium alloys. The manganese-containing magnesium alloy is a main variety in magnesium alloy products, the content of manganese element in the magnesium alloy is generally below 1%, and the manganese mainly plays a role in promoting the crystallization refinement of the magnesium alloy and improving the corrosion resistance and the creep deformation performance of the magnesium alloy.
At present, in the process of producing manganese-containing magnesium alloy products, two adding modes of manganese element are provided, one mode is that an Al-Mn intermediate alloy ingot is melted and dissolved into an alloy liquid, and the other mode is that anhydrous manganese chloride powder is added into a magnesium alloy liquid and is reduced by molten magnesium:
MnCl 2 (s)＋Mg(l)＝MgCl 2 (l)＋Mn(s)
the manganese metal particles obtained by reduction are dissolved in the magnesium alloy liquid, and the molten MgCl obtained by reduction 2 Because the density of the alloy liquid is higher than that of the alloy liquid and the alloy liquid has good fluidity, the alloy liquid is easy to separate from the alloy liquid and is settled to the bottom of the crucible to form slag. MnCl 2 The fine particle material of (2) enables a high reduction rate of Mn. Compared with the use of Al-Mn master alloy, MnCl 2 The granular material has obvious cost advantage, and in the adding process, the newly generated magnesium chloride has good activity, so that the purification capacity and effect of the alloy liquid are improved, and therefore, the anhydrous manganese chloride becomes a preferred raw material for adding the manganese element in the production of the magnesium alloy.
The anhydrous manganese chloride is peach-red granules or powder, has strong hygroscopicity and the density of 2.977g/cm 3 Melting point 650 deg.C, boiling point 1190 deg.C, is easily soluble in water, soluble in alcohol, and insoluble in ether; heating in air releases hydrogen chloride gas.
Because the electrolyte is melted along with the mixture of magnesium chloride, calcium chloride, sodium chloride and the like in the magnesium alloy smelting process, when the electrolyte is exposed to air containing moisture, the electrolyte absorbs moisture in the air, and the magnesium chloride reacts with the water to generate hydrolysis reaction, so that basic magnesium chloride is generated in the first step of hydrolysis and then is decomposed into magnesium oxide and hydrogen chloride gas:
MgCI 2 ＋H 2 O=MgOHCI＋HCI↑
MgOHCI=MgO＋HCI↑
if the tail gas is discharged to a factory building, the tail gas can harm the health of operators and corrode the factory building and equipment; if the water is diffused to a factory area, the ecological environment of the surrounding area is polluted.
In the prior industrial production of magnesium alloy, the typical traditional addition method of anhydrous manganese chloride particles is as follows: firstly, pouring anhydrous manganese chloride particles into an open material box from a packaging bag, adding a proper amount of refining solvent by using a shovel, uniformly mixing, when the alloy furnace charge is completely melted in an alloy melting furnace and the temperature is raised to 720-730 ℃, hanging a preheated stirrer into the alloy melting furnace to be in place and fixed, starting the stirrer at the minimum frequency, gradually increasing the stirrer to the normal rotating speed, and at the moment, uniformly scattering the mixture of the anhydrous manganese chloride and the refining solvent of the alloy close to the center of the vortex of the alloy liquid by using the shovel or a shovel manually, wherein the operation process needs to be carried out for 20-60 minutes continuously.
The main disadvantages of the conventional method are as follows: because the addition amount of the powder particles is not controlled, the powder particles cannot be uniformly and stably added only by the personal experience and habit of an operator, so that the mass and heat transfer efficiency and the chemical reaction efficiency are low, and the improvement of the quality of the magnesium alloy and the utilization rate of manganese chloride is not facilitated; because the cover of the magnesium alloy melting furnace is open and a dust collecting and waste gas purifying system is not arranged, the operation site has sharp smoke and flying dust in the adding process, and the magnesium alloy melting furnace is in an unorganized discharging state and has bad industrial sanitary condition; basically depends on manual field intervention and operation, the automatic control level is very low, the workload is complicated, and the labor intensity is high.
Disclosure of Invention
In order to solve the technical defect problems, the utility model provides a manganese-containing anhydrous manganese chloride particle adding system and a using method thereof.
The technical scheme of the utility model:
an anhydrous manganese chloride particle adding system in manganese-containing magnesium alloy production is characterized in that: the system consists of an anhydrous manganese chloride particle storage tank (1), a pressure feed tank (2), a first dust collector (3), a magnesium alloy smelting furnace (4), a second dust collector (5), a tail gas scrubber (6) and a dry air buffer tank (7); the anhydrous manganese chloride particle storage tank (1) is arranged right above the pressure feed tank (2) and is connected with the pressure feed tank through a feed pipe (8), and a rotary valve I (9) and a switch valve I (10) are arranged on the feed pipe (8); the rear end of the pressure feed tank (2) is provided with a first dust collector (3) which is communicated with the pressure feed tank through a first pipeline (11), and the first pipeline (11) is provided with a second switch valve (12); a magnesium alloy smelting furnace (4) is arranged right below the first dust collector (3) and is communicated with the first dust collector through a discharging pipe (13), and a rotary valve II (14) and a switch valve III (15) are arranged on the discharging pipe (13); a second dust collector (5) is arranged at the rear end of the magnesium alloy smelting furnace (4) and connected with the second dust collector through a second pipeline (16), and a fourth switch valve (17) is arranged on the second pipeline (16); a tail gas scrubber (6) is arranged at the rear end of the second dust collector (5) and connected with the third dust collector through a pipeline (18), and a switch valve (19) is arranged on the third pipeline (18); the tail gas washer (6) is provided with a gas inlet (29), a gas outlet (30), a liquid outlet (31) and a liquid inlet (32), a gas exhaust pipeline (22) is arranged behind the gas outlet (30), an exhaust fan (23) and a switch valve seven (24) are arranged on the gas exhaust pipeline (22), a cleaning solution circulating pipeline (25) is arranged between the liquid outlet (31) and the liquid inlet (32), and a circulating pump (26), a switch valve eight (27), a switch valve nine (28) and a waste liquid discharging pipeline (33) are arranged on the cleaning solution circulating pipeline (25); the dry air buffer tank (7) is arranged nearby the pressure feed tank (2) and connected with the pressure feed tank through a fourth pipeline (20), and a sixth switch valve (21) is arranged on the fourth pipeline (20).
As an optimal technical scheme of the utility model, rotary valve 9 is electronic rotary valve, adopts 304L stainless steel, supporting flange and motor, accessible operation panel manual control, also can be through SFC automatic control, and accessible variable frequency speed governing adjusts driving motor's rotational speed in order to realize suitable input speed, and this valve of accessible is followed anhydrous manganese chloride granule storage tank 1 to the feeding of forced lubrication jar 2 with the settlement velocity of flow.
As the utility model discloses a preferred technical scheme, magnesium alloy smelting furnace 4 is the induction furnace, and under the alternating electromagnetic field effect in the induction furnace, thereby the inside vortex that produces of material reaches heating and melting purpose, and this not only is favorable to the alloy liquid composition even, is convenient for realize the good sealed of magnesium alloy smelting furnace 4 moreover.
As a preferred technical scheme of the utility model, dust collector 3 is high-efficient sack filter for here with anhydrous manganese chloride granule and the high-efficient separation of dry air, dust collection efficiency can reach more than 99%, has both avoided the air to get into the harm that causes in the magnesium alloy stove along with the manganese chloride granule like this, ensures the air discharge to reach standard of isolating again.
As a preferred technical scheme of the utility model, rotary valve two 14 is electric rotary valve, and accessible Variable Frequency Speed Governing (VFSG) is followed dust collector one 3 and is stabilized the feeding to magnesium alloy induction furnace 4 in succession for the mass transfer heat transfer and the chemical reaction of manganese chloride granule in the interpolation process can strengthen, are favorable to improving magnesium alloy quality and anhydrous manganese chloride's rate of recovery.
As an optimized technical proposal of the utility model, the second dust collector 5 is a cyclone dust collector and is used for eliminating manganese chloride, magnesium oxide and chloride dust in the dust-containing smoke discharged from the magnesium alloy smelting furnace 4, and the dust removal efficiency can reach 85 percent.
As an optimized technical scheme of the utility model, tail gas scrubber 6 is sodium hydroxide solution washing packed tower for the waste gas that contains trace hydrogen chloride gas and solid dust of further purification treatment two 5 exhaust dust collectors, the purification efficiency of hydrogen chloride and solid dust all can reach more than 99%, can ensure to handle back tail gas discharge to reach standard.
The use method of the anhydrous manganese chloride particle adding system in the production of the manganese-containing magnesium alloy specifically comprises the following steps:
the method comprises the following steps: and (4) system condition confirmation, namely checking and confirming whether the system meets the condition of normal production item by item.
Step two: and (3) filling the anhydrous manganese chloride particles into an anhydrous manganese chloride particle storage tank 1 to a set material level.
Step three: and opening a first switch valve 10, starting a first rotary valve 9, and feeding the anhydrous manganese chloride particles from the storage tank 1 to the pressure feed tank 2 to a set material level through a feeding pipe 8.
Step four: and opening a second switch valve 12, a second rotary valve 14, a third switch valve 15, a fourth switch valve 17, a fifth switch valve 19 and a seventh switch valve 24, and starting the exhaust fan 23.
Step five: and opening the eight switch valve 27, starting the circulating pump 26 and opening the nine switch valve 28, so that the whole anhydrous manganese chloride adding system is in an idle running state.
Step six: opening a switch valve six 21, wherein the particles in the pressure feed tank 2 are pneumatically conveyed to a dust collector one 3 through a pipeline one 11 at a set flow rate, and clean air filtered and separated is exhausted through an exhaust pipeline 22; the anhydrous manganese chloride particles intercepted by the filter bag fall to the lower part of the first dust collector 3 and enter the magnesium alloy smelting furnace 4 through a feeding pipe 13, a second rotary valve 14 and a third switch valve 15 which are arranged on the feeding pipe 13 under the action of gravity; harmful flue gas containing trace solid particles and HCI discharged from a magnesium alloy smelting furnace 4 enters a subsequent dust collector II 5 through a pipeline II 1 to remove about 85% of particles, then enters an exhaust gas washer 6 through a pipeline III 18, is continuously washed through a washing liquid circulating pipeline 25 to further remove HCI gas and residual small particles, the tail gas after washing and purifying reach the standard is emptied through an exhaust pipeline 22, and when the PH of the washing liquid is reduced to 8, the waste liquid discharging pipeline 33 discharges decontamination water for treatment and supplies new washing liquid, so that the system is switched to a normal operation state.
Compared with the prior art, the utility model discloses following beneficial effect has: a relatively professional and normative integrated system for adding anhydrous manganese chloride particles and purifying flue gas in the production of the manganese-containing magnesium alloy is established, the traditional operation mode with unit supervision and manual operation as the main mode is developed into the refined automatic production of systematic centralized control, and the production of homogeneous and fine-grained high-quality alloy products is facilitated; the recovery rate of the anhydrous manganese chloride particles can be improved, and the production cost of the alloy is reduced; can ensure that the on-site industrial sanitary conditions and the tail gas emission reach the dual standards; can promote the technical progress and high-quality development of the magnesium alloy production industry.
Drawings
FIG. 1 is a schematic view of an anhydrous manganese chloride particle adding system in the production of manganese-containing magnesium alloy.
In the figure: 1. an anhydrous manganese chloride particle storage tank; 2. a pressure feed tank; 3. a first dust collector; 4. a magnesium alloy smelting furnace; 5. a second dust collector; 6. a tail gas scrubber; 7. a dry air buffer tank; 8. a feeding pipe; 9. a first rotary valve; 10. a first switch valve; 11. a first pipeline; 12. a second switch valve; 13. a discharging pipe; 14. a second rotary valve; 15. a third switch valve; 16. a second pipeline; 17. a fourth switch valve; 18. a third pipeline; 19. a fifth switch valve; 20. a fourth pipeline; 21. switching valve six; 22. an exhaust line; 23. an exhaust fan; 24. a switch valve seven; 25. a washing liquid circulation pipeline; 26. a circulation pump; 27. opening and closing a valve eight; 28. a ninth switch valve; 29. an air inlet; 30. an exhaust port; 31. a liquid outlet; 32. a liquid inlet; 33. a waste liquid discharge line.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be apparent that the described embodiments are only some embodiments of the present invention, rather than all embodiments; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1
Referring to the attached figure 1, the utility model provides an anhydrous manganese chloride granule adding system in manganese-containing magnesium alloy production, which is characterized in that: the system consists of an anhydrous manganese chloride particle storage tank (1), a pressure feed tank (2), a first dust collector (3), a magnesium alloy smelting furnace (4), a second dust collector (5), a tail gas scrubber (6) and a dry air buffer tank (7); the anhydrous manganese chloride particle storage tank (1) is arranged right above the pressure feed tank (2) and is connected with the pressure feed tank through a feed pipe (8), and a rotary valve I (9) and a switch valve I (10) are arranged on the feed pipe (8); the rear end of the pressure feed tank (2) is provided with a first dust collector (3) which is communicated with the first dust collector through a first pipeline (11), and the first pipeline (11) is provided with a second switch valve (12); a magnesium alloy smelting furnace (4) is arranged right below the first dust collector (3) and is communicated with the first dust collector through a discharging pipe (13), and a rotary valve II (14) and a switch valve III (15) are arranged on the discharging pipe (13); a second dust collector (5) is arranged at the rear end of the magnesium alloy smelting furnace (4) and connected with the second pipeline (16), and a fourth switch valve (17) is arranged on the second pipeline (16); a tail gas scrubber (6) is arranged at the rear end of the second dust collector (5) and connected with the third dust collector through a pipeline (18), and a switch valve (19) is arranged on the third pipeline (18); the tail gas washer (6) is provided with a gas inlet (29), a gas outlet (30), a liquid outlet (31) and a liquid inlet (32), a gas exhaust pipeline (22) is arranged behind the gas outlet (30), an exhaust fan (23) and a switch valve seven (24) are arranged on the gas exhaust pipeline (22), a cleaning solution circulating pipeline (25) is arranged between the liquid outlet (31) and the liquid inlet (32), and a circulating pump (26), a switch valve eight (27), a switch valve nine (28) and a waste liquid discharging pipeline (33) are arranged on the cleaning solution circulating pipeline (25); the dry air buffer tank (7) is arranged nearby the pressure feed tank (2) and connected with the pressure feed tank through a fourth pipeline (20), and a sixth switch valve (21) is arranged on the fourth pipeline (20).
Example 2
A use method of an anhydrous manganese chloride particle adding system in manganese-containing magnesium alloy production specifically comprises the following steps:
the method comprises the following steps: and (4) system condition confirmation, namely checking and confirming whether the system meets the condition of normal production item by item.
Step two: and (3) filling the anhydrous manganese chloride particles into an anhydrous manganese chloride particle storage tank 1 to a set material level.
Step three: and opening a first switch valve 10, starting a first rotary valve 9, and feeding the anhydrous manganese chloride particles from the storage tank 1 to the pressure feed tank 2 to a set material level through a feeding pipe 8.
Step four: and opening a second switch valve 12, a second rotary valve 14, a third switch valve 15, a fourth switch valve 17, a fifth switch valve 19 and a seventh switch valve 24, and starting an exhaust fan 23.
Step five: and opening the eight switch valve 27, starting the circulating pump 26 and opening the nine switch valve 28, so that the whole anhydrous manganese chloride adding system is in an idle running state.
Step six: opening a switch valve six 21, wherein the particles in the pressure feed tank 2 are pneumatically conveyed to a dust collector one 3 through a pipeline one 11 at a set flow rate, and clean air filtered and separated is exhausted through an exhaust pipeline 22; the anhydrous manganese chloride particles intercepted by the filter bag fall to the lower part of the first dust collector 3 and enter the magnesium alloy smelting furnace 4 through a feeding pipe 13, a second rotary valve 14 and a third switch valve 15 which are arranged on the feeding pipe 13 under the action of gravity; harmful flue gas containing trace solid particles and HCI discharged from a magnesium alloy smelting furnace 4 enters a subsequent dust collector II 5 through a pipeline II 1 to remove about 85% of particles, then enters an exhaust gas washer 6 through a pipeline III 18, is continuously washed through a washing liquid circulating pipeline 25 to further remove HCI gas and residual small particles, the tail gas after washing and purifying reach the standard is emptied through an exhaust pipeline 22, and when the PH of the washing liquid is reduced to 8, the waste liquid discharging pipeline 33 discharges decontamination water for treatment and supplies new washing liquid, so that the system is switched to a normal operation state.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. An anhydrous manganese chloride particle adding system in manganese-containing magnesium alloy production is characterized in that: the system consists of an anhydrous manganese chloride particle storage tank (1), a pressure feed tank (2), a first dust collector (3), a magnesium alloy smelting furnace (4), a second dust collector (5), a tail gas scrubber (6) and a dry air buffer tank (7); the anhydrous manganese chloride particle storage tank (1) is arranged right above the pressure feed tank (2) and is connected with the pressure feed tank through a feed pipe (8), and a rotary valve I (9) and a switch valve I (10) are arranged on the feed pipe (8); the rear end of the pressure feed tank (2) is provided with a first dust collector (3) which is communicated with the pressure feed tank through a first pipeline (11), and the first pipeline (11) is provided with a second switch valve (12); a magnesium alloy smelting furnace (4) is arranged right below the first dust collector (3) and is communicated with the first dust collector through a discharging pipe (13), and a rotary valve II (14) and a switch valve III (15) are arranged on the discharging pipe (13); a second dust collector (5) is arranged at the rear end of the magnesium alloy smelting furnace (4) and connected with the second dust collector through a second pipeline (16), and a fourth switch valve (17) is arranged on the second pipeline (16); a tail gas scrubber (6) is arranged at the rear end of the second dust collector (5) and connected with the third dust collector through a pipeline (18), and a switch valve (19) is arranged on the third pipeline (18); the tail gas washer (6) is provided with a gas inlet (29), a gas outlet (30), a liquid outlet (31) and a liquid inlet (32), a gas exhaust pipeline (22) is arranged behind the gas outlet (30), an exhaust fan (23) and a switch valve seven (24) are arranged on the gas exhaust pipeline (22), a cleaning solution circulating pipeline (25) is arranged between the liquid outlet (31) and the liquid inlet (32), and a circulating pump (26), a switch valve eight (27), a switch valve nine (28) and a waste liquid discharging pipeline (33) are arranged on the cleaning solution circulating pipeline (25); the dry air buffer tank (7) is arranged nearby the pressure feed tank (2) and connected with the pressure feed tank through a fourth pipeline (20), and a sixth switch valve (21) is arranged on the fourth pipeline (20).
2. The system for adding the anhydrous manganese chloride particles in the production of the manganese-containing magnesium alloy according to claim 1, wherein: the first rotary valve (9) and the second rotary valve (14) are frequency-adjustable electric rotary valves.
3. The system for adding the anhydrous manganese chloride particles in the production of the manganese-containing magnesium alloy according to claim 1, wherein: the magnesium alloy smelting furnace (4) is an induction furnace.
4. The system for adding the anhydrous manganese chloride particles in the production of the manganese-containing magnesium alloy according to claim 1, wherein: the first dust collector (3) is a high-efficiency cloth bag filter.
5. The system for adding the anhydrous manganese chloride particles in the production of the manganese-containing magnesium alloy according to claim 1, wherein: and the second dust collector (5) is a cyclone dust collector.
6. The system for adding the anhydrous manganese chloride particles in the production of the manganese-containing magnesium alloy according to claim 1, wherein: the tail gas scrubber (6) is a sodium hydroxide solution washing packed tower.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221455841.8U CN217397852U (en) | 2022-06-13 | 2022-06-13 | Anhydrous manganese chloride particle adding system in manganese-containing magnesium alloy production |
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| CN202221455841.8U CN217397852U (en) | 2022-06-13 | 2022-06-13 | Anhydrous manganese chloride particle adding system in manganese-containing magnesium alloy production |
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