CN110482502A - A kind of energy-efficient manganese nitride production process - Google Patents
A kind of energy-efficient manganese nitride production process Download PDFInfo
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- CN110482502A CN110482502A CN201910946411.2A CN201910946411A CN110482502A CN 110482502 A CN110482502 A CN 110482502A CN 201910946411 A CN201910946411 A CN 201910946411A CN 110482502 A CN110482502 A CN 110482502A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
- C04B28/26—Silicates of the alkali metals
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
Abstract
The present invention provides a kind of energy-efficient manganese nitride production process, manganese metal raw material is directly melt into liquid by the technique, by being atomized primary nitridation, is then condensed into after high-temperature powder secondary nitridation again, production process is short, and nitrided manganese can be obtained by one step of electrolytic manganese metal piece.Manganese powder processed and Nitration synthesis are integrated, produces and easily realizes automation control, high production efficiency, environmental pollution is small, and comprehensive production cost is low, and power consumption can be controlled in 380 degree of product per ton or less.
Description
Technical field
The present invention relates to Additive Production fields in Ferrous Metallurgy, and in particular to the production technology of nitrogenized manganese.
Background technique
Existing nitrogenized manganese large-scale production is carried out in large-scale vacuum nitriding furnace, is batch production, general 24 is small
When produce a batch, 4~10 tons of every batch of, quality is stablized, and controllably, but there is also following disadvantages.
(1) production energy consumption is high: 450 degree of product power consumption (energy consumption without manganese powder processed) per ton, wherein electrical heating vacuum
370 KWhs/ton of products of furnace electricity consumption, vacuumize and 80 KWhs/ton of products of nitrogen power consumption processed.
(2) total production process length, comprehensive high production cost: for the most nitrided manganese of market demand,
Intermediate products existing for production link have: electrolytic manganese metal piece (metal manganese block) → manganese powder → forging rolling manganese ball → nitrogenized manganese ball
→ nitrided manganese is at least crushed, is mixed, forging and stamping, nitridation, crushing 5 procedures, and overall cost is high.If directly using manganese metal
Powder nitridation is easy to be sintered blocking, it is also necessary to be crushed again, and the blocking rear nitrogenizing effect of sintering is poor, nitrogen content is low.Patent
2013106268813 directly go fluidization to nitrogenize with manganese powder, and manganese powder and nitrogen require first to preheat respectively, system work
Skill parameter is difficult to control, and enforcement difficulty is big, high production cost.
(3) environmental pollution is big: either nitrided manganese or nitrogenized manganese ball (pillow), requires a manganese metal piece (block) and is made
Manganese powder, and existing powder mode processed is mainly high pressure roller mill or ball milling, noise is big, in addition vibrosieve equipment, raises
Dust is also big, though there is dust arrester installation, system is not easy closed, and the Dust Capacity of leakage is still very much, to operator's danger of live institute
Evil is larger, pollutes to surrounding enviroment also big.
(4) product quality needs to be continued to improve, and impurity content is high, and the oxide containing manganese is more, that is, uses the very high electricity of purity
Manganese metal piece is solved, through product testing, oxygen element content 2%~3%, it is active to be primarily due to manganese chemical property, electrolytic manganese metal piece
Although can all aoxidize blackening grey after storing a period of time, after being broken into manganese powder, oxygen element content has by Passivation Treatment
0.5%~1%, after adding waterglass mixing, forging and stamping balling-up, each link of drying, and newly-generated manganese oxide, so that oxygen element content is up to
2.5%~3%.Also there is technical solution to propose to rush the hydrogeneous reducibility gas such as ammonia pyrolysis gas into furnace, restore the manganese oxide of generation,
Small part and high production cost can only be restored.
Summary of the invention
The purpose of the present invention is existing insufficient in view of the above technology, provides a kind of energy-efficient nitrogenized manganese production work
Manganese metal raw material (electrolytic manganese metal piece or metal manganese block) is directly melt into liquid by skill, the technique, by being atomized primary nitridation,
Then secondary nitridation again is condensed into after high-temperature powder, to obtain large batch of high-quality nitridation manganese product.
The specific technical solution of the present invention is as follows: a kind of energy-efficient manganese nitride production process, it is characterised in that including
Following steps.
One, manganese metal melts: manganese metal being placed in electromagnetic induction melting furnace, smelting temperature 1350 DEG C~1600 is controlled
DEG C, melting manganese liquid is obtained, refining melting manganese liquid removes upper layer manganese oxide dross.
Two, primary atomization nitrogenizes: pure nitrogen gas being passed through atomizer, melting manganese liquid is sucked atomizer, in spray chamber intrinsic fog
It is melted into droplet, pure nitrogen gas is passed through Wen's duster, meticulous manganese powder is sucked into Wen's duster, then sprays into atomization
Room condenses into powder with the manganese droplet collision absorption of atomization；It realizes and recycles meticulous manganese powder, accelerate the condensation of manganese liquid, simultaneously
It is being atomized indoor cooling coil and the reinforcement cooling of water cooling jacket, atomizer nitrogen pressure 0.8MPa~4MPa is being controlled, by powder
Body granularity is controlled in 300um~500um；Spray chamber nitrogen pressure 0.01MPa~0.1MPa is controlled, is atomized 750 DEG C of room temperature
~950 DEG C.
Three, secondary nitridation: red-hot manganese powder is deposited to spray chamber bottom, is passed through pure nitrogen gas from spray chamber bottom, right
Manganese powder carries out secondary boiling nitridation, controls 750 DEG C~950 DEG C of nitriding temperature.
Four, cooling packing: being cooled to room temperature through cooler after secondary nitridation, and the material gone out from cooler discharge gate is nitrogen
Change manganese powder product, the gas containing powder of cooler exhaust outlet enters primary separator, the fine powder that primary separator discharge gate goes out
As nitrided manganese product.
Further, the gas containing powder that the primary separator exhaust outlet goes out enters back into deduster after entering second-stage separator,
The mistake fine powder gone out from second-stage separator and deduster discharge gate enters spray chamber reuse, house outlet by Wen's duster
Reuse nitrogen is to spray chamber after tail gas enters supercharger pressurization after cooling, into the manganese metal of spray chamber and the mass ratio of nitrogen
For 9~15:1.
Further, the nitrided manganese product is mixed with binder, and mixture is put into the charging on forging press or roll squeezer
In storehouse, it is then pressed into nitrogenized manganese ball or nitrogenized manganese pillow, density reaches 4g~5g/cm3, each finished product substance after compression moulding
250g~500g is packed with jumbo bag or metal bucket after drying and consolidating.
Further, the drying and consolidating of the nitrogenized manganese ball (pillow) is spontaneously dried with hot-air seasoning or normal temperature air circulation.
Further, the manganese metal raw material is electrolytic manganese metal or manganese-silicon or manganeisen.
Further, the pure nitrogen gas refers to the pure nitrogen gas of nitrogen content 99.99%.
Further, the binder is sodium silicate or potassium water glass or instant powdery sodium silicate.
Further, when the instant powdery sodium silicate of the binder, after mixing with nitrided manganese, mixture is put into forging press
Or in the feeding warehouse on roll squeezer, water vapour is passed through in feeding warehouse, so that steam and instant powdery sodium silicate is contacted wetting, has
Viscosity is then pressed into nitrogenized manganese ball or nitrogenized manganese pillow, and normal temperature air circulation spontaneously dries, and obtains nitrogenized manganese ball or nitrogenized manganese pillow
Product.
The beneficial effects of the present invention are:
1, good product quality reduces and aoxidizes manganese content in product, improves manganese element yield.When manganese metal melts, on manganese metal
Manganese oxide got rid of in the form of dross, and postorder nitridation do not generate new manganese oxide.Even if the re-compacted balling-up of nitrided manganese
Also manganese oxide not easily generated forms similar glass small crystals, specific surface area because manganese molten liquid is atomized into particle under atmosphere protection
It is small, it is not easy to be oxidized, in addition not having to liquid glass makees binder, greatly reduces a possibility that generating manganese oxide, nitrogenized manganese
The Control for Oxygen Content of powder finished product is 0.5% hereinafter, the Control for Oxygen Content of nitrogenized manganese ball (pillow) finished product shows 0.8% hereinafter, being far below
There is the oxygen content of product 3%.
2, the case where reuse in manganese powder processed of meticulous manganese powder produces, fine powder was not present mostly and cannot utilize；Nitrogen
Gas utilization rate is high, and the nitrogen circulation of non-nitridation reaction utilizes not outlet.
3, production process is short, and nitrided manganese can be obtained by one step of electrolytic manganese metal piece.Will manganese powder and Nitration synthesis processed one,
Automation control is easily realized in production, and high production efficiency, environmental pollution is small, and comprehensive production cost is low, and comprehensive power consumption is can be controlled in often
380 degree of product of ton or less.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
Below with reference to Fig. 1, the present invention is illustrated.Superfine active aluminium powder device is taken to carry out nitrogen atomization legal system
Transformation, takes on superfine active aluminium powder device basic in original nitrogen atomization legal system, gas melting furnace is changed to Medium frequency induction melting
Electric furnace uses heat-resisting material to the atomizer of spray chamber top connection；Wen's duster separately is added on spray chamber top, in mist
Change room lower part and add Wen's duster, and increase the heat exchange area of water cooling heat exchanger in spray chamber, configures batch mixer, forging press,
Metering packing equipment, in addition secondary cyclone is only used in classification, and after the completion of being transformed to device, concrete operations are as follows:
One, manganese metal piece melts: electrolytic manganese metal piece being placed in medium frequency induction melting furnace, controls 1450 DEG C of smelting temperature, essence
Refining melting manganese liquid removes upper layer manganese oxide slag.
Two, powder by atomization: being passed through atomizer for pure nitrogen gas, carries out atmosphere to spray chamber, cooler, cyclone separator and sets
It changes, after Cyclone outlet oxygen content gas is less than 0.5%, melting manganese liquid is sucked atomizer, is melted into spray chamber intrinsic fog
Pure nitrogen gas is passed through Wen's duster by droplet, and meticulous manganese powder is sprayed into spray chamber, is adsorbed with manganese droplet collision is atomized,
Condensation, while atomization room temperature is adjusted with cooling coil and water cooling jacket, 750 DEG C~950 DEG C of room temperature are atomized, mist is controlled
Change device nitrogen pressure 0.8MPa~4MPa, powder granularity is controlled in 300um~500um；Control spray chamber nitrogen pressure
0.01MPa~0.1MPa.
Three, secondary nitridation: the manganese powder for condensing into powder is deposited to spray chamber bottom, is passed through purity nitrogen from spray chamber bottom
Gas carries out secondary boiling to manganese powder and nitrogenizes, controls 750 DEG C~900 DEG C of nitriding temperature.
Four, cooling packing: being cooled to room temperature through cooler after secondary nitridation, and the material gone out from cooler discharge gate is nitrogen
Change manganese powder product, the gas containing powder of cooler exhaust outlet enters primary separator, the fine powder that primary separator discharge gate goes out
As nitrided manganese product.
Preferably, the gas containing powder that the primary separator exhaust outlet goes out enters back into deduster after entering second-stage separator,
The mistake fine powder gone out from second-stage separator and deduster discharge gate enters spray chamber reuse, house outlet by Wen's duster
Reuse nitrogen is to spray chamber after tail gas enters supercharger pressurization after cooling, into the manganese metal of spray chamber and the mass ratio of nitrogen
For 12:1.
Preferably, the nitrided manganese product is mixed with instant powdery sodium silicate, and mixture is put into the charging on roll squeezer
In storehouse, water vapour is passed through in feeding warehouse, so that steam and instant powdery silicon sodium is contacted wetting, there is viscosity, be then pressed into nitrogen
Change manganese ball, density reaches 4g~6g/cm3, each finished product substance 250g~300g after compression moulding, and normal temperature air circulation nature is done
It is packed after dry with jumbo bag or metal bucket.
Thus method is produced nitrided manganese product and existing product with regard to the power consumption table of comparisons.
Thus the nitrided manganese product quality data and the existing product table of comparisons that method is produced.
| Mn | N | O | Mn+N | |
| Existing product content (%) | 87.9 | 8.8 | 2.9 | 96.7 |
| Product of the present invention content (%) | 89.2 | 10.4 | 0.2 | 99.6 |
Basic principles and main features of the invention have been shown and described above.It should be understood by those skilled in the art that
The present invention is not limited to the above embodiments, and the above embodiments and description only illustrate the principle of the present invention, In
Without departing from the spirit and scope, various changes and improvements may be made to the invention, these changes and improvements are all fallen
Enter in scope of the claimed invention.The scope of the present invention is defined by the appended claims and its equivalents.
Claims (8)
1. a kind of energy-efficient manganese nitride production process, it is characterised in that include the following steps:
One, manganese metal melts: manganese metal raw material being placed in electromagnetic induction melting furnace, smelting temperature 1350 DEG C~1600 is controlled
DEG C, melting manganese liquid is obtained, refining melting manganese liquid removes upper layer manganese oxide dross；
Two, primary atomization nitrogenizes: pure nitrogen gas being passed through atomizer, melting manganese liquid is sucked atomizer, is melted into spray chamber intrinsic fog
Pure nitrogen gas is passed through Wen's duster by droplet, and meticulous manganese powder is sucked Wen's duster, then sprays into spray chamber, together
The manganese droplet collision of atomization adsorbs, and condenses into powder；It is being atomized indoor cooling coil and water cooling jacket adjusting spray chamber simultaneously
Temperature is atomized 750 DEG C~950 DEG C of room temperature, controls atomizer nitrogen pressure 0.8MPa~4MPa, and powder granularity control is existed
300um~500um；Control spray chamber nitrogen pressure 0.01MPa~0.1MPa；
Three, secondary nitridation: red-hot manganese powder is deposited to spray chamber bottom, pure nitrogen gas is passed through from spray chamber bottom, to metal
Manganese powder carries out secondary boiling nitridation, controls 750 DEG C~950 DEG C of nitriding temperature；
Four, cooling packing: being cooled to room temperature through cooler after secondary nitridation, and the material gone out from cooler discharge gate is nitrogenized manganese
Powder product, the gas containing powder of cooler exhaust outlet enter primary separator, the fine powder also conduct that primary separator discharge gate goes out
Nitrided manganese product.
2. the energy-efficient manganese nitride production process of one kind according to claim 1, which is characterized in that the level-one separation
The gas containing powder that the exhaust outlet of device goes out enters back into deduster after entering second-stage separator, from second-stage separator discharge gate and deduster
The mistake fine powder that discharge gate goes out enters spray chamber reuse by Wen's duster, and house outlet tail gas enters pressurization after cooling
For reuse nitrogen to spray chamber, the mass ratio of manganese metal and nitrogen into spray chamber is 9~15:1 after machine pressurization.
3. the energy-efficient manganese nitride production process of one kind according to claim 1, which is characterized in that the manganese metal is former
Material is electrolytic manganese metal or manganese-silicon or manganeisen.
4. the energy-efficient manganese nitride production process of one kind according to claim 1, which is characterized in that the pure nitrogen gas is
Refer to the pure nitrogen gas of nitrogen content 99.99%.
5. the energy-efficient manganese nitride production process of one kind according to claim 1, which is characterized in that the nitrided manganese
It is mixed with binder, is then pressed into nitrogenized manganese ball or nitrogenized manganese pillow, density reaches 4g~5g/cm3, Mei Gecheng after compression moulding
Product substance 250g~500g is packed with jumbo bag or metal bucket after drying and consolidating.
6. the energy-efficient manganese nitride production process of one kind according to claim 5, which is characterized in that the compression moulding
Nitrogenized manganese ball drying and consolidating be with hot-air seasoning or normal temperature air circulation spontaneously dry.
7. the energy-efficient manganese nitride production process of one kind according to claim 5, which is characterized in that the binder is
Sodium silicate or potassium water glass or instant powdery sodium silicate.
8. the energy-efficient manganese nitride production process of one kind according to claim 7, which is characterized in that the binder is
Instant powdery sodium silicate, after mixing with nitrided manganese, mixture is put into the feeding warehouse on forging press or roll squeezer, by water vapour
It is passed through in feeding warehouse, so that steam and instant powdery silicon sodium is contacted wetting, there is viscosity, be then pressed into nitrogenized manganese ball or nitrogenized manganese
Pillow, then normal temperature air circulation spontaneously dry, and obtain nitrogenized manganese ball or nitrogenized manganese pillow product.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114560451A (en) * | 2022-03-31 | 2022-05-31 | 北京科技大学 | Method for continuously producing manganese nitride product |
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2019
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