CN102249657A - Calcination and flash drying cyclic energy saving technology for intermediate wet carbonate from soft magnetic manganese zinc iron composite material prepared through precipitation method - Google Patents
Calcination and flash drying cyclic energy saving technology for intermediate wet carbonate from soft magnetic manganese zinc iron composite material prepared through precipitation method Download PDFInfo
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- CN102249657A CN102249657A CN2011101007521A CN201110100752A CN102249657A CN 102249657 A CN102249657 A CN 102249657A CN 2011101007521 A CN2011101007521 A CN 2011101007521A CN 201110100752 A CN201110100752 A CN 201110100752A CN 102249657 A CN102249657 A CN 102249657A
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Abstract
The invention discloses a calcination and flash drying cyclic energy saving technology for an intermediate wet carbonate from a soft magnetic manganese zinc iron composite material prepared through a precipitation method. First, a calcining and expansion drying cyclic energy saving system is set up. Wet carbonate is added into a flash dryer, dried rapidly by waste heat in the dryer, then sent to a secondary cyclone by system negative pressure, and enters to a calciner bottom from the cyclone bottom through a spiral. Depending on heat provided by an airheater and system negative pressure, the material fully contacts with heat and is treated with ebullience calcination in the calciner. After calcination, calcined material, together with superfluous heat, is introduced into a primary cyclone by the system negative pressure, treated with cyclone separation and falls into a hopper collector; and residual heat is introduced into a flash drying furnace bottom. According to the invention, an integral utilization of waste heat after calcination drying is realized; and the calcined material has stable physical ignition lost and is sieved by a 160 mesh screen, leaving riddling no more than 1%, to obtain black brown powder.
Description
Technical field
The technology of the present invention is the preparation that belongs to the magneticsubstance raw material, and the wet carbonate of intermediate product that belongs to the compound material of precipitator method production soft magnetic manganese zinc iron is specifically calcined, the circulating energy-saving technology of expansion drying.
Background technology
Patent " a kind of method of producing mixture of soft magnetic manganese zinc iron " (patent No.: ZL 2,009 1 0103167.X) practical large-scale production (1.5 ten thousand tons/when a) using, the equipment of its decomposing and calcining process using is common rotary kiln.Find in the production process to utilize rotary kiln to carry out drying and calcining: temperature is difficult to balanced control (material moisture heterogeneity), and the product after the calcining is very easy to reunite simultaneously, is the deadly defect of magneticsubstance raw material yet reunite.Utilize rotary kiln simultaneously in carrying out drying and incinerating process, the waste heat of generation is taken away in a large number, and the utilization ratio of heat is very low, neither energy-conservation also not environmental protection.
Summary of the invention
For solving above technical problem, the wet carbonic acid of intermediate product that the object of the present invention is to provide a kind of precipitator method to produce the compound material of soft magnetic manganese zinc iron is difficult for reuniting, and it is fixed to burn unstability, and the circulating energy-saving technology of the calcining of energy-conserving and environment-protective, expansion drying.
The present invention seeks to realize like this:
A kind of precipitator method are produced calcining, the expansion drying circulating energy-saving technology of the wet carbonate of intermediate product of the compound material of soft magnetic manganese zinc iron, carry out as follows:
A, calcining, expansion drying circulating energy-saving system are set, are communicated with by first cyclone between dynamic calcining stove and the flash distillation dryer, described flash distillation dryer is communicated with the cloth bag suction cleaner by second cyclone; Described dynamic calcining furnace bottom is communicated with hotblast stove, this dynamic calcining furnace roof portion links to each other with the first cyclone tangential entry, this first cyclone top exit links to each other with the flash distillation dryer bottom inlet, this flash distillation dryer top links to each other with the second cyclone tangential entry, and this second cyclone top exit links to each other with the cloth bag suction cleaner; The described second cyclone lower end discharge port is communicated with the junction of hotblast stove and dynamic calcining stove by the single tube spiral conveyer; Described cloth bag suction cleaner is connected with induced draft fan, and described flash distillation dryer bottom connects feeding screw, and the described first cyclone discharge port is connected with the hopper collector;
B, the wet carbonate of intermediate product of the precipitator method being produced the compound material of soft magnetic manganese zinc iron joins in the flash distillation dryer through feeding screw, be the waste heat more than 200 ℃ simultaneously with dynamic calcining stove calcining back temperature, send into flash distillation dryer by first cyclone, the carbonate that will wet carries out rapid drying in flash distillation dryer, rely on system's negative pressure to enter second cyclone then, enter the dynamic calcining furnace bottom in second cyclone bottom by the single tube spiral conveyer, this moment, hotblast stove provided the heat more than 500 ℃, under the suction function of system, wet carbonate after drying enters the dynamic calcining stove and fully contacts with hot gas flow, fluidized calcination, after calcining is finished, dependence system negative pressure will be calcined the back material and be introduced first cyclone with unnecessary heat, separate back material by first cyclone and fall into the hopper collector.
In calcining furnace material fully contact with heat energy, fluidized calcination, after calcining is finished, dependence system negative pressure will be calcined back material and unnecessary heat introduction primary cyclone, drop out by material after the cyclonic separation, surplus heat is introduced into the expansion drying furnace bottom and recycles, and has realized the effect of circulating energy-saving.Carry out the wet carbonate of dry composite material, and the comprehensive utilization that has realized calcining dry back waste heat, and the physicals of the material of calcining gained meets the specification of quality of the compound material of soft magnetic materials ferrimanganic zinc fully: burn unstability and decide, cross 160 mesh sieve screen overflow≤1%, the chocolate powder.
Above-mentioned calcining, when expansion drying circulating energy-saving system moves for the first time, start hotblast stove earlier to the heat supply of dynamic calcining stove, after by first cyclone heat being introduced flash distillation dryer material is carried out drying again, just enter the dynamic calcining stove and calcine, expansion drying circulating energy-saving operation again.
Above-mentioned wet carbonate is one or more mixing of iron carbonate, manganous carbonate, nickelous carbonate.
Beneficial effect: the present invention has changed calcining and the drying of utilizing rotary kiln the precipitator method to be produced the wet carbonate of the compound material intermediate product of soft magnetic manganese zinc iron, overcome the material inequality of being heated, the moisture inequality, the defective that calcining back product is reunited easily, it is fixed that the product that obtains burns unstability, simultaneously abundant recycle waste heat, the very energy-conservation and environmental protection of whole technology.
Description of drawings
Fig. 1 is calcining of the present invention, expansion drying circulating energy-saving system connection diagram.
Embodiment
Embodiment 1
Produce 10.5 tons in the coprecipitated powder of last the tenth groove (carbonate), water content 35%,
A, calcining, expansion drying circulating energy-saving system are set, are communicated with by first cyclone 5 between dynamic calcining stove 1 and the flash distillation dryer 2, described flash distillation dryer 2 is communicated with cloth bag suction cleaner 4 by second cyclone 6; Described dynamic calcining stove 1 bottom is communicated with hotblast stove 3, this dynamic calcining stove 1 top links to each other with first cyclone, 5 tangential entries, these first cyclone, 5 top exits link to each other with flash distillation dryer 2 bottom inlet, these flash distillation dryer 2 tops link to each other with second cyclone, 6 tangential entries, and these second cyclone, 6 top exits link to each other with cloth bag suction cleaner 4; Described second cyclone, 6 lower end discharge ports are communicated with the junction of hotblast stove 3 and dynamic calcining stove 1 by single tube spiral conveyer 7; Described cloth bag suction cleaner 4 is connected with induced draft fan 8, and described flash distillation dryer 2 bottoms connect feeding screw 9, and described first cyclone, 5 discharge ports are connected with hopper collector 10;
B, the wet carbonate of intermediate product of the precipitator method being produced the compound material of soft magnetic manganese zinc iron joins in the flash distillation dryer 2 through feeding screw 9, be 200 ℃ waste heat simultaneously with dynamic calcining stove 1 calcining back temperature, send into flash distillation dryer 2 by first cyclone 5, the carbonate that will wet carries out rapid drying in flash distillation dryer 2, rely on system's negative pressure to enter second cyclone 6 then, enter calcining furnace 1 bottom in second cyclone, 6 bottoms by single tube spiral conveyer 7, this moment, hotblast stove 3 provided 800 ℃ heat, under the suction function of system, wet carbonate after drying enters dynamic calcining stove 1 and fully contacts with hot gas flow, fluidized calcination, after calcining is finished, dependence system negative pressure will be calcined the back material and be introduced first cyclone 5 with unnecessary heat, separate back materials by first cyclone 5 and fall into hopper collector 10.The product that obtains burnt and lost deviation all less than 3% in calcining whirlwind outlet sampling the different period in service, and crossing 160 mesh sieve screen overflows is 0.7%＜1%, obtains the chocolate powder.
Embodiment 2
Produce 8.3 tons in the coprecipitated powder of last the tenth groove (carbonate), water content 40%,
Technology is identical with enforcement 1, and different is: the waste heat gas flow temperature of dynamic calcining stove 1 calcining back input flash distillation dryer 2 is 220 ℃; The heat that hotblast stove 3 provides is 820 ℃, and crossing 160 mesh sieve screen overflows at last is 0.6%＜1%, obtains the chocolate powder.
Embodiment 3
Produce 13.3 tons in the coprecipitated powder of last the tenth groove (carbonate), water content 40%,
Technology is identical with enforcement 1, and different is: the waste heat gas flow temperature of dynamic calcining stove 1 calcining back input flash distillation dryer 2 is 220 ℃; The heat that hotblast stove 3 provides is 820 ℃, and crossing 160 mesh sieve screen overflows at last is 0.6%＜1%, obtains the chocolate powder.
Embodiment 4
Produce 11.4 tons in the coprecipitated powder of last the tenth groove (carbonate), water content 40%,
Technology is identical with enforcement 1, and different is: the waste heat gas flow temperature of dynamic calcining stove 1 calcining back input flash distillation dryer 2 is 220 ℃; The heat that hotblast stove 3 provides is 500 ℃, takes a sample in the outlet of calcining whirlwind every 1 hour, and the product that obtains burns and loses deviation all less than 3%, and crossing 160 mesh sieve screen overflows is 0.5%＜1%, the chocolate powder.
Embodiment 5
Produce 9.4 tons in the coprecipitated powder of last the tenth groove (carbonate), water content 42%,
Technology is identical with enforcement 1, and different is: the waste heat gas flow temperature of dynamic calcining stove 1 calcining back input flash distillation dryer 2 is 300 ℃; The heat that hotblast stove 3 provides is 700 ℃, and in calcining whirlwind outlet sampling, the product that obtains burns and loses deviation all less than 3%, and crossing 160 mesh sieve screen overflows is 0.6%＜1%, the chocolate powder.
Embodiment 6
Produce 11.7 tons in the coprecipitated powder of last the tenth groove (carbonate), water content 39%,
Technology is identical with enforcement 1, and different is: the waste heat gas flow temperature of dynamic calcining stove 1 calcining back input flash distillation dryer 2 is 300 ℃; The heat that hotblast stove 3 provides is 900 ℃, and the product that obtained in calcining whirlwind outlet sampling every 0.5 hour burns and loses deviation all less than 3%, and crossing 160 mesh sieve screen overflows is 0.6%＜1%, the chocolate powder.
Claims (3)
1. the wet carbonate calcining of the intermediate product of the compound material of precipitator method production soft magnetic manganese zinc iron, expansion drying circulating energy-saving technology, carry out as follows:
A, calcining, expansion drying circulating energy-saving system are set, be communicated with by first cyclone (5) between dynamic calcining stove (1) and the flash distillation dryer (2), described flash distillation dryer (2) is communicated with cloth bag suction cleaner (4) by second cyclone (6); Described dynamic calcining stove (1) bottom is communicated with hotblast stove (3), this dynamic calcining stove (1) top links to each other with first cyclone (5) tangential entry, this first cyclone (5) top exit links to each other with flash distillation dryer (2) bottom inlet, this flash distillation dryer (2) top links to each other with second cyclone (6) tangential entry, and this second cyclone (6) top exit links to each other with cloth bag suction cleaner (4); Described second cyclone (6) lower end discharge port is communicated with the junction of hotblast stove (3) and dynamic calcining stove (1) by single tube spiral conveyer (7); Described cloth bag suction cleaner (4) is connected with induced draft fan (8), and described flash distillation dryer (2) bottom connects feeding screw (9), and described first cyclone (5) discharge port is connected with hopper collector (10);
B, the wet carbonate of intermediate product of the precipitator method being produced the compound material of soft magnetic manganese zinc iron joins in the flash distillation dryer (2) through feeding screw (9), be the waste heat more than 200 ℃ simultaneously with dynamic calcining stove (1) calcining back temperature, send into flash distillation dryer (2) by first cyclone (5), the carbonate that will wet carries out rapid drying in flash distillation dryer (2), rely on system's negative pressure to enter second cyclone (6) then, enter calcining furnace (1) bottom in second cyclone (6) bottom by single tube spiral conveyer (7), hotblast stove this moment (3) provides the heat more than 500 ℃, under the suction function of system, wet carbonate after drying enters dynamic calcining stove (1) and fully contacts with hot gas flow, fluidized calcination, after calcining is finished, dependence system negative pressure will be calcined the back material and be introduced first cyclone (5) with unnecessary heat, separate back material by first cyclone (5) and fall into hopper collector (10).
2. produce the wet carbonate calcining of intermediate product, the expansion drying circulating energy-saving technology of the compound material of soft magnetic manganese zinc iron according to the described a kind of precipitator method of claim 1, it is characterized in that: described calcining, when expansion drying circulating energy-saving system moves for the first time, start hotblast stove (3) earlier to dynamic calcining stove (1) heat supply, after by first cyclone (5) heat being introduced flash distillation dryer (2) material is carried out drying again, just enter dynamic calcining stove (1) and calcine, expansion drying circulating energy-saving operation again.
3. produce the wet carbonate calcining of intermediate product, the expansion drying circulating energy-saving technology of the compound material of soft magnetic manganese zinc iron according to the described a kind of precipitator method of claim 1, it is characterized in that: described wet carbonate is one or more mixing of iron carbonate, manganous carbonate, nickelous carbonate.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114990365A (en) * | 2022-07-11 | 2022-09-02 | 重庆上甲电子股份有限公司 | Method for recovering rare earth and main element iron from neodymium iron boron waste, molten salt system and application of molten salt system as soft magnetic ferrite raw material |
| CN115141942A (en) * | 2022-07-11 | 2022-10-04 | 重庆上甲电子股份有限公司 | Method for recovering rare earth from neodymium iron boron waste and separating main element iron and application of method in preparation of soft magnetic ferrite as raw material |
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| JP2007070138A (en) * | 2005-09-05 | 2007-03-22 | Nikko Co Ltd | Apparatus for thermal regenerative treatment of waste gypsum |
| CN101008045A (en) * | 2006-01-24 | 2007-08-01 | 洛阳栾川钼业集团冶炼有限责任公司 | Rotary flash distillation direct combustion heat-supply type rotary kiln baking apparatus and process for molybdenum concentrate |
| CN201246948Y (en) * | 2008-07-24 | 2009-05-27 | 浙江天一新材料有限公司 | Flash evaporation drying pumping return equipment |
| CN201512420U (en) * | 2009-09-16 | 2010-06-23 | 白银中天化工有限责任公司 | Aluminum hydroxide drying system |
| CN201728037U (en) * | 2010-08-13 | 2011-02-02 | 刘德华 | Calcination drying filtering system for aluminum fluoride preparation |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007070138A (en) * | 2005-09-05 | 2007-03-22 | Nikko Co Ltd | Apparatus for thermal regenerative treatment of waste gypsum |
| CN101008045A (en) * | 2006-01-24 | 2007-08-01 | 洛阳栾川钼业集团冶炼有限责任公司 | Rotary flash distillation direct combustion heat-supply type rotary kiln baking apparatus and process for molybdenum concentrate |
| CN201246948Y (en) * | 2008-07-24 | 2009-05-27 | 浙江天一新材料有限公司 | Flash evaporation drying pumping return equipment |
| CN201512420U (en) * | 2009-09-16 | 2010-06-23 | 白银中天化工有限责任公司 | Aluminum hydroxide drying system |
| CN201728037U (en) * | 2010-08-13 | 2011-02-02 | 刘德华 | Calcination drying filtering system for aluminum fluoride preparation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114990365A (en) * | 2022-07-11 | 2022-09-02 | 重庆上甲电子股份有限公司 | Method for recovering rare earth and main element iron from neodymium iron boron waste, molten salt system and application of molten salt system as soft magnetic ferrite raw material |
| CN115141942A (en) * | 2022-07-11 | 2022-10-04 | 重庆上甲电子股份有限公司 | Method for recovering rare earth from neodymium iron boron waste and separating main element iron and application of method in preparation of soft magnetic ferrite as raw material |
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