CN104988312A - Method for smelting manganese-iron alloy by using microwave heating of manganese ore - Google Patents
Method for smelting manganese-iron alloy by using microwave heating of manganese ore Download PDFInfo
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- CN104988312A CN104988312A CN201510024668.4A CN201510024668A CN104988312A CN 104988312 A CN104988312 A CN 104988312A CN 201510024668 A CN201510024668 A CN 201510024668A CN 104988312 A CN104988312 A CN 104988312A
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Abstract
The present invention relates to a method for smelting a manganese-iron alloy by using microwave heating of manganese ore. According to the method, a microwave generator produces microwaves with a frequency of 2.45 GHZ, the microwaves are introduced into a reactor by using a metal waveguide, the microwave and raw materials for manganese-iron alloy smelting interact in the reactor, the raw materials for manganese-iron alloy smelting absorb microwave energy in the microwave field and the temperature is rapidly increased, an oxidation reduction reaction of manganese oxide and carbon is generated between the raw materials at a temperature of 700-1500 DEG C and is the heat absorption reaction, the microwave is continuously used to heat the reaction raw materials so as to provide heat for the reaction, the microwave field provides the promoting effect for the manganese oxide reduction reaction, and under the microwave effect, the manganese oxide is rapidly reduced so as to generate the manganese-iron alloy. Compared with the method in the prior art, the method of the present invention has the following advantages that the microwave heating is used to smelt the manganese-iron alloy, and advantages of rapid heating, short raw material heating time, energy consumption reducing and the like are provided.
Description
Technical field
The invention belongs to metallurgical technology field, relate to a kind of method utilizing microwave heating Smelting Plant manganeseirom, there is heating rate fast, heat-up time is short, reduce the advantages such as energy consumption.
Background technology
Manganeseirom is the important alloy of steel-making, and usage quantity is maximum, is the important alloy improving steel mechanics performance.China produces about more than 3,000 ten thousand tons, iron alloy every year, and wherein the iron alloy of 98% adopts mineral hot furnace to produce, and namely uses mineral hot furnace that ore and coke are heated to pyroreaction.Mineral hot furnace heating be by electrode by these heating raw materials to high temperature, and more than 1600 DEG C need be heated to, but these materials conductive and heat transfer efficiency low, heat-processed power consumption is large, rate of heating slowly, the production cycle is long.Production environment is poor, seriously polluted, energy consumption is large.
Summary of the invention
The object of the invention is to overcome temperature rise rate in existing iron alloy heat-processed slow, the problem that heat-up time is long, provides a kind of method utilizing microwave heating Smelting Plant manganeseirom.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of method utilizing microwave heating Smelting Plant manganeseirom, it is characterized in that, raw material is the manganese ore of ferromanganese smelting alloy, agglomerate and coke etc., and producing frequency by adopting microwave generator is the microwave of 2.45GHZ, and utilizes metallic waveguide microwave to be imported reactor; The raw material of microwave and ferromanganese smelting alloy interacts in the reactor, and the raw material of alloy smelting is mainly manganese ore and coke, is extraordinary microwave absorbing material, manganeseirom raw materials for metallurgy microwave energy absorbing in microwave field, and temperature rises fast; When temperature reaches more than 700 DEG C, in raw material, Mn oxide and coke start to react, and produce manganeseirom; Temperature is higher, reacts faster, and Mn oxide reduction is more thorough; Continue to adopt microwave to heating raw materials at high temperature, make up the heat absorption of Mn oxide reduction reaction and process is dispelled the heat the energy expenditure and loss that cause, and promote that quick and high efficient reaction is carried out.
Concrete grammar step is:
1) in manganeseirom is produced, joined by raw material in reactor, manganese ore, agglomerate and coke are mixed, nature, loosely carry out cloth;
2) importing in reactor with the microwave that frequency is 2.45GHZ by metallic waveguide, by adjusting the layout of waveguide, making raw material be in the high position of microwave field strength as far as possible; Raw material microwave energy absorbing, is rapidly heated temperature required to chemical reaction, 700-1500 DEG C; If temperature rise rate is too fast or excessively slow in heat-processed, regulate by changing Microwave emission power;
3) between high temperature iron alloy raw material, chemical reaction occurs, adopt microwave to continue heating, the heat that postreaction heat absorption consumes and system are dispelled the heat the power loss caused, and chemical reaction is carried out fast at high temperature.
4) also continue to provide microwave at hot stage, utilize the reduction reaction of microwave assisted Mn oxide, manganeseirom is generated fast.
Further, described raw material is manganese ore and the coke of ferromanganese smelting alloy, and the granularity of manganese ore and agglomerate is not more than 60mm, and coke size is not more than 30mm, so that Mn oxide and the rapid reaction of coke energy; Simultaneously raw materials usedly want naturally loose and be deposited in together, to ensure having certain porosity in reaction raw materials, the gases such as the CO generated in reaction can freely be got rid of.
Further, described raw material is the manganese ore of ferromanganese smelting alloy, agglomerate and coke, and in the proportioning between three, oxygen and carbon mol ratio are 1:1.4-1.7.
Further, described microwave power be greater than 1kw/t by heating raw mass ratio.
Microwave heating has advantages such as selecting heating, rapid heating, body heating and instant heating, and micro-wave energy is pollution-free, save energy and reduce the cost, be easy to control, is a kind of green type of heating.
Laboratory study about mineral microwave heating a lot of people did, but be only limitted to a small amount of pure substance or Powdered, raw materials used for actual iron alloy production, and adopt microwave heating ferromanganese smelting alloy, not yet someone explores at present.
The present invention is a kind of method utilizing microwave heating Smelting Plant manganeseirom, adopt microwave heating Smelting Plant manganeseirom raw material, because the manganese ore of ferromanganese smelting alloy, agglomerate and coke have good absorbing microwave capability, can be rapidly heated at short notice, the time that great shortening heating raw is used, thus reach the object that save energy reduces energy consumption and reduction production cost, there is significant economic benefit.When continuing after the temperature that raw material reaches needed for reaction to adopt microwave heating manganeseirom raw materials for metallurgy, making up redox reaction heat absorption and process and to dispel the heat the energy expenditure and loss that cause, and promoting that quick and high efficient reaction is carried out.
Compared with relying on heated by electrodes Smelting Plant manganeseirom technology with existing mineral hot furnace or refining furnace, the present invention utilizes microwave to add the raw material ferromanganese smelting alloys such as manganese ore, agglomerate and coke, there is heating rate fast, greatly shorten the heating raw time used, thus reach the object that save energy reduces energy consumption and reduction production cost, there is the advantages such as significant economic benefit.
Accompanying drawing explanation
Fig. 1 is the heating curve of case one.
Fig. 2 is the heating curve of case two and case three.
Fig. 3 is the heating curve of case four and case five.
Embodiment
Make the technical problem to be solved in the present invention, technical scheme and advantage clearly, be described in detail below in conjunction with concrete drawings and Examples.
The embodiment of the present invention have employed a kind of method of microwave heating Smelting Plant manganeseirom.Described method is specially: this example raw material used is South Africa block manganese, Brazil sintering manganese ore, Chenzhou block manganese ore, coke, it is raw materials used that these raw materials are certain iron alloy enterprise mine heat furnace smelting high carbon ferromanganese domestic, South Africa block manganese ore size is between 1cm to 5cm, Brazil's agglomerate size is between 1cm to 6cm, Chenzhou block manganese size is between 1.5cm to 5cm, coke size is between 1.5 to 3cm, raw material main component and content are in table 1, it is 1kg that raw material adds total mass, in batching, oxygen carbon mol ratio is in table 2, and material phase analysis the results are shown in Table 3.
Table 1 raw material main chemical compositions (massfraction)
Table 2 feed oxygen carbon mol ratio
Table 3 raw material material phase analysis result
Example one: be checking raw material absorbing microwave capability in microwave field, the microwave of power 4KW frequency 2.45GHZ is adopted to heat Brazilian agglomerate, South Africa block manganese ore, Chenzhou block manganese ore, coke etc. respectively, single raw material is 4KW at microwave power, in the microwave field of frequency 2.45GHZ, temperature-raising characteristic contrast is in table 4, and heating curve is shown in Fig. 1.Can find out that four kinds of raw materials of ferromanganese smelting all can heat in microwave by Fig. 1 and table 4, and all there is good absorbing property, can be rapidly heated at short notice, illustrate that employing microwave heating iron alloy raw material is feasible.
The single raw material temperature-raising characteristic contrast of table 4
Embodiment two: setting microwave power is 4KW, frequency is 2.45GHZ, takes 1kg raw material by table 2 batching mode, in batching, oxygen carbon mol ratio is 1:1.5, and naturally loose for raw material is put into crucible inside, starts heating, be warmed up to 1450 DEG C, regulate microwave power to enter holding mode, be incubated 60 minutes, carry out the smelting of ferromanganese, after insulation terminates, close microwave, cool, cooling completes, and is taken out by the ferromanganese smelted, carries out components tests.
Embodiment three: setting microwave power is 4KW, frequency is 2.45GHZ, takes 1.5kg raw material by table 2 batching mode, in batching, oxygen carbon mol ratio is 1:1.6, and naturally loose for raw material is put into crucible inside, starts heating, be warmed up to 1500 DEG C, regulate microwave power to enter holding mode, be incubated 90 minutes, carry out the smelting of ferromanganese, after insulation terminates, close microwave, cool, cooling completes, and is taken out by the ferromanganese smelted, carries out components tests.
Embodiment four: setting microwave power is 4KW, frequency is 2.45GHZ, takes 1kg raw material by table 2 batching mode, in batching, oxygen carbon mol ratio is 1:1.6, and naturally loose for raw material is put into crucible inside, starts heating, be warmed up to 1450 DEG C, regulate microwave power to enter holding mode, be incubated 60 minutes, carry out the smelting of ferromanganese, after insulation terminates, close microwave, cool, cooling completes, and is taken out by the ferromanganese smelted, carries out components tests.
Embodiment five; Setting microwave power is 6KW, and frequency is 2.45GHZ, takes 1kg raw material by table 2 batching mode, in batching, oxygen carbon mol ratio is that naturally loose for raw material is put into crucible inside by 1:1.5, starts heating, is warmed up to 1450 DEG C, regulate microwave power to enter holding mode, be incubated 90 minutes, carry out the smelting of ferromanganese, after insulation terminates, close microwave, cool, cooling completes, the ferromanganese smelted is taken out, carries out components tests.
The manganeseirom that obtains is smelted through its composition of assay in table 5 in rear four embodiments.
Fig. 2, Fig. 3 are the contrast heating curve of above-mentioned rear four embodiments, as can be seen from heating curve, adopting during 4kw power heating needs about 600s just can reach about 1300 DEG C, average heating rate is 2.16, adopt 6kw power heating just can be heated to 1300 DEG C at about 500s, average heating rate is 2.6, can find out micro-wave energy rapid heating ferromanganese raw material at short notice.Although the temperature rise rate of mixture in microwave field also exists difference, its heating curve is very similar.The microwave heating temperature-rise period of mixture is divided into three phases, and first stage and subordinate phase are the main stages that material heats up.The fastest at microwave heating first stage temperature rise rate, because manganese ore and coke all easily absorb micro-wave energy, after microwave radiation, temperature of charge raises rapidly, and now mixture temperature is lower, the dielectric properties of material not yet changes, and this stage heating curve meets linear relationship; Temperature enters subordinate phase after reaching 600-800 DEG C, but this stage microwave heating temperature rise rate declines still very fast to some extent, this stage material starts mutually to react, reaction is thermo-negative reaction, simultaneously, there are some and change in the dielectric properties of reaction mass, therefore heat-up rate comparatively the first stage slightly low; Mixture temperature enters the phase III between 1200-1300 DEG C, and now reaction is violent, and endothermic heat of reaction is strong, and temperature rise rate is slower.
The ferromanganese composition range that table 5 obtains for rear four embodiments.Table 6 is national standard " ferromanganese " (GB/T 3795-2006)
The ferromanganese composition (mass percent) that table 5 four kinds of embodiments obtain
Table 6 national standard " ferromanganese " (GB/T 3795-2006)
Table 5 data and table 6 data are contrasted, above-mentioned rear four embodiments are smelted gained ferromanganese composition and are met GB medium high carbon ferromanganese composition.
The above embodiment; be only wherein some embodiments of the present invention, not any pro forma restriction done, under the prerequisite not departing from principle of the present invention to the present invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. one kind utilizes the method for microwave heating Smelting Plant manganeseirom, it is characterized in that, by the microwave adopting microwave generator to produce certain frequency, and utilize metallic waveguide microwave to be imported manganeseirom production reactor, the raw material of microwave and ferromanganese smelting alloy interacts in the reactor; Raw material due to ferromanganese smelting alloy is mainly manganese ore and coke, has good Microwave Absorption Properties, manganeseirom raw materials for metallurgy microwave energy absorbing in microwave field, and temperature rises fast; The temperature rise rate of raw material is controlled by adjustment Microwave emission power; Concrete grammar step is:
Step 1: joined by raw material in reactor, makes manganese ore, agglomerate and coke mix, and nature, loosely carry out cloth;
Step 2: importing in reactor with the microwave that frequency is 2.45 GHZ by metallic waveguide, by adjusting the layout of waveguide, making raw material be in microwave field strength high-order bit; Raw material microwave energy absorbing, is rapidly heated to 700-1500 DEG C, and insulation 0.5-5 hour, carries out the smelting of ferromanganese, and after insulation terminates, close microwave, cool, cooling completes.
2. the method for ferromanganese smelting alloy according to claim 1, is characterized in that, described raw material is the manganese ore of ferromanganese smelting alloy, agglomerate and coke, and the granularity of manganese ore and agglomerate is not more than 60mm, and coke size is not more than 30mm.
3. the method for ferromanganese smelting alloy according to claim 1, is characterized in that, described raw material is the manganese ore of ferromanganese smelting alloy, agglomerate and coke, and in the proportioning between three, oxygen and carbon mol ratio are 1:1.4-1.7.
4. the method for ferromanganese smelting alloy according to claim 1, is characterized in that, described microwave power be greater than 1kw/t by heating raw mass ratio.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834424A (en) * | 2016-05-17 | 2016-08-10 | 昆明理工大学 | Method for agglomerating ferromanganese alloy powder through microwave sintering |
| CN107513624A (en) * | 2016-06-16 | 2017-12-26 | 陕西盛华冶化有限公司 | The method that a kind of microwave treatment low-grade manganese reactor and microwave smelt low-grade manganese |
| CN107513633A (en) * | 2016-06-16 | 2017-12-26 | 陕西盛华冶化有限公司 | A kind of method that microwave smelts low-grade manganese |
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| CN101113496A (en) * | 2007-07-13 | 2008-01-30 | 太原理工大学 | Method for preparing low-carbon metal manganese iron by using manganese-poor powdered ore |
| CN102251115A (en) * | 2011-07-14 | 2011-11-23 | 云南建水锰矿有限责任公司 | Method for producing high-carbon manganese-iron alloy from high-alkalinity manganese ore |
| CN102373333A (en) * | 2011-09-29 | 2012-03-14 | 云南文山斗南锰业股份有限公司 | Method for preparing high carbon ferromanganese |
| CN102631985A (en) * | 2012-03-28 | 2012-08-15 | 湘潭大学 | Mineral separation method for improving manganese grade in low-grade mixed manganese mine |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101113496A (en) * | 2007-07-13 | 2008-01-30 | 太原理工大学 | Method for preparing low-carbon metal manganese iron by using manganese-poor powdered ore |
| CN102251115A (en) * | 2011-07-14 | 2011-11-23 | 云南建水锰矿有限责任公司 | Method for producing high-carbon manganese-iron alloy from high-alkalinity manganese ore |
| CN102373333A (en) * | 2011-09-29 | 2012-03-14 | 云南文山斗南锰业股份有限公司 | Method for preparing high carbon ferromanganese |
| CN102631985A (en) * | 2012-03-28 | 2012-08-15 | 湘潭大学 | Mineral separation method for improving manganese grade in low-grade mixed manganese mine |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105834424A (en) * | 2016-05-17 | 2016-08-10 | 昆明理工大学 | Method for agglomerating ferromanganese alloy powder through microwave sintering |
| CN107513624A (en) * | 2016-06-16 | 2017-12-26 | 陕西盛华冶化有限公司 | The method that a kind of microwave treatment low-grade manganese reactor and microwave smelt low-grade manganese |
| CN107513633A (en) * | 2016-06-16 | 2017-12-26 | 陕西盛华冶化有限公司 | A kind of method that microwave smelts low-grade manganese |
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