CN110331329A - A kind of preparation method of Smelting High Speed Steel ferro-molybdenum - Google Patents
A kind of preparation method of Smelting High Speed Steel ferro-molybdenum Download PDFInfo
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- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
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- C22C1/00—Making non-ferrous alloys
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- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
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Abstract
The invention discloses a kind of preparation methods of Smelting High Speed Steel ferro-molybdenum, specifically: first, by molybdenum oxide, fluffy powder, fluxing agent, reducing agent and desulfurizing agent are added in batch mixer and are uniformly mixed, obtain mixed raw material, mixed raw material is added to the intracavitary carry out heating and thermal insulation of electric furnace again, heating temperature is 100 DEG C~300 DEG C, soaking time is 5min~10min, it is being warming up to 1300 DEG C~1800 DEG C later, and keep the temperature 40min~110min, complete the smelting of mixed accessories, cooled to room temperature, obtain ferro-molybdenum cake, it crushes, Smelting High Speed Steel ferro-molybdenum can be obtained.This method has cast out the high auxiliary material of unit cost as reducing agent, greatly reduces ferro-molybdenum smelting cost, increases the carbon content in ferro-molybdenum product.In addition, being heated using electric furnace, the process that control molybdenum-iron is smelted can be reached by adjusting temperature and time, is achieved energy-saving and emission reduction purposes.
Description
Technical field
The invention belongs to alloy material preparation technical fields, and in particular to a kind of preparation of Smelting High Speed Steel ferro-molybdenum
Method.
Background technique
Molybdenum is as metal product, since it has higher melt, good elevated temperature strength, excellent thermal-shock resistance
Energy, lower high temperature creep rate, while there is smaller neutron absorption cross-section, thermal conductivity response quickly and linear expansion coefficient
Low characteristic keeps it wide in fields such as vacuum high-temperature furnace body, electronic instrument, aerospace, weapons equipment, ship and nuclear powers
General application；As heavy chemicals, ammonium molybdate and molybdenum oxide including molybdenum disulfide, catalytic action with lubricating action etc. make
It is widely used in the fields such as machinery, petroleum, weaving, printing and dyeing, papermaking and pigment；And in field of iron and steel smelting, due to molybdenum element
There is solution strengthening effect to ferrite, the intensity and hardness of steel can be enhanced, the passivation ability again of steel can be improved, to improve not
The resistance to spot corrosion and slit and corrosion resistant ability of rust steel, improve the high temperature strength of steel, there is the high-temperature and durable of steel and croop property
Larger improvement improves the resistance to acid and alkali of steel, has secondary invigoration effect, and then improve the wearability and obdurability of steel, improves quenching for steel
The advantages that permeability and weldability, according to pertinent literature, application accounting of the molybdenum as additive in the field of smelting containing molybdenum steel reaches
80% or more of global molybdenum total quantity consumed.
In field of smelting containing molybdenum steel, commonly mainly there are traditional ferro-molybdenum, pure zirconia molybdenum block, composite oxygen containing molybdenum additives
Change molybdenum block and steel-making metal molybdenum item etc..The preparation of traditional molybdenum-iron is primarily present using sial thermal reduction, this method outside furnace
The flue gas and waste residue that consumption of raw and auxiliary materials is at high cost, reduction reaction temperature is excessively high and pilot process is not easy to control, generates can aggravate ring
The disadvantages of field working conditions condition difference and labor cost are higher is smelted in border pollution.Using molybdenum oxide lump as steel-making additive,
Although reducing one of smelting process, the processing cost of ferro-molybdenum is reduced, reduces environmental pollution, molybdenum oxide lump is deposited
The defects of density is low, volatile, the recovery rate that will cause molybdenum amount in smelting process containing molybdenum steel is low, steelmaking equipment dirt
The unfavorable factors such as dye damage and the adjustment of traditional process for making.For making steel molybdenum item, preparation will be by roasting, washing, acid
Alkali leaching, ammonia leaching, drying, after baking, two sections reduction and compacting, sintering, forging etc. techniques, processing technology is too long, Cheng Chancheng
This is excessively high, and " three wastes " are seriously polluted, simultaneously because molybdenum rod density is higher, molten steel bottom can be sunk in steelmaking process, is unfavorable for
The uniform diffusion of molybdenum element, reduces the recovery rate of molybdenum.It is above-mentioned commonly to may serve to smelt high speed containing molybdenum additives
Steel, but it has consumption that supplementary material is at high cost, reaction process and temperature are not easy to control, aggravate environmental pollution, result in waste of resources,
Molybdenum yield is low and the excessively high unfavorable factor of product preparation cost.
Summary of the invention
The object of the present invention is to provide a kind of preparation methods of Smelting High Speed Steel ferro-molybdenum, reduce ferro-molybdenum
Smelting cost increases the content of carbon in ferro-molybdenum product.
The technical scheme adopted by the invention is that a kind of preparation method of Smelting High Speed Steel ferro-molybdenum, specifically according to
Following steps are implemented:
It step 1, is 3.5~4.5:2.5~4:0.3~0.5:1.5~2:0.7~1 molybdenum oxide by mass ratio, loose
Agent, fluxing agent, reducing agent and desulfurizing agent are added in batch mixer and are uniformly mixed, and obtain mixed raw material；
Step 2, the mixed raw material obtained after step 1 is added to the intracavitary carry out heating and thermal insulation of electric furnace, heating temperature
It is 100 DEG C~300 DEG C, soaking time is 5min~10min, removes the moisture in mixed raw material, is being warming up to 1300 DEG C later
~1800 DEG C, and 40min~110min is kept the temperature, the smelting of mixed accessories is completed, cooled to room temperature obtains ferro-molybdenum
Cake；
Step 3, ferro-molybdenum cake is crushed, Smelting High Speed Steel ferro-molybdenum can be obtained.
The features of the present invention also characterized in that
In step 1, the revolving speed of batch mixer is 960r/min~1500r/min, and mixing time is 10min~30min.
In step 1, molybdenum oxide is industrial molybdenum oxide, and molybdenum content is 45%~55%, and granularity is not more than 3mm；Fluffy powder is
Ferric oxide powder, mass fraction are not less than 98.5%, and granularity is not more than 1mm；Fluxing agent is ammonia leaching residue, and molybdenum content is
10%~30%, granularity is not more than 5mm；Reducing agent is carbon dust, and mass fraction is not less than 99.5%, and granularity is not more than 0.5mm；
Desulfurizing agent is calcium oxide, and mass fraction is not less than 98%, and granularity is not more than 0.5mm.
The preparation method of ammonia leaching residue, specifically:
Step 1.1, industrial molybdenum oxide is put into progress pickling in reaction kettle with dust technology to react, is filtered, obtains later
To solid matter be industrial molybdenum oxide filter cake；
Reaction temperature is 75 DEG C~90 DEG C, the reaction time is 1h~2h；
The mass ratio of industrial molybdenum oxide and dust technology is 1:3；
Step 1.2, the industrial molybdenum oxide filter cake obtained after step 1.1 and weak aqua ammonia are put into reaction kettle and carry out ammonia
Leaching adjusts the temperature of reaction kettle to 70 DEG C, and it is 8.5~9.0 that weak aqua ammonia to pH value of solution is added dropwise into mixed liquor, is 70 DEG C in temperature
Under conditions of react 1h, i.e., free ammonia reaches certain value, draws supernatant liquor and send the storage clarification of ammonium molybdate storage tank；Then again to anti-
It answers and injects weak aqua ammonia in kettle, carry out secondary ammonia leaching, to improve metal leaching rate, adjust the temperature of reaction kettle to 70 DEG C, to mixing
It is 8.5~9.0 that weak aqua ammonia to pH value of solution is added dropwise in liquid, and 1h is reacted under conditions of temperature is 70 DEG C, is put after secondary ammonia leaching
Material filtering, filter residue is ammonia leaching residue, and obtained filtrate is returned to primary progress ammonia leaching, i.e., injects weak aqua ammonia into filtrate again and carries out
Ammonia leaching adjusts the temperature of reaction kettle to 70 DEG C, and it is 8.5~9.0 that weak aqua ammonia to pH value of solution is added dropwise into mixed liquor, later in temperature
1h is reacted under conditions of being 70 DEG C, blowing filters after ammonia soaks, and filter residue is ammonia leaching residue, the filter that the leaching reaction of each ammonia is obtained
Slag mixing, can be obtained ammonia leaching residue.
In step 3, the granularity of ferro-molybdenum is between 10mm~100mm.
The invention has the advantages that
The raw material that this method has abandoned conventional method is chosen, and has cast out the high auxiliary material of unit cost as reducing agent, has selected
Carbon dust makees reducing agent, greatly reduces ferro-molybdenum smelting cost, increases the carbon content in ferro-molybdenum product.In addition,
It is heated using electric furnace, the process that control molybdenum-iron is smelted can be reached by adjusting temperature and time, is achieved energy-saving and emission reduction purposes.
Specific embodiment
The present invention is described in detail With reference to embodiment.
A kind of preparation method of Smelting High Speed Steel ferro-molybdenum of the present invention, is specifically implemented according to the following steps:
It step 1, is 3.5~4.5:2.5~4:0.3~0.5:1.5~2:0.7~1 molybdenum oxide by mass ratio, loose
Agent, fluxing agent, reducing agent and desulfurizing agent are added in batch mixer and are uniformly mixed, and obtain mixed raw material；
The revolving speed of batch mixer is 960r/min~1500r/min, and mixing time is 10min~30min.
Molybdenum oxide is industrial molybdenum oxide, wherein molybdenum content is 45%~55%, and granularity is not more than 3mm；
Fluffy powder is ferric oxide powder, and mass fraction is not less than 98.5%, and granularity is not more than 1mm；
Fluxing agent is ammonia leaching residue, and molybdenum content is 10%~30%, and granularity is not more than 5mm；
Reducing agent is carbon dust, and mass fraction is not less than 99.5%, and granularity is not more than 0.5mm；
Desulfurizing agent is calcium oxide, and mass fraction is not less than 98%, and granularity is not more than 0.5mm；
The preparation method of ammonia leaching residue, specifically:
Step 1.1, industrial molybdenum oxide is put into progress pickling in reaction kettle with dust technology to react, is filtered, obtains later
To solid matter be industrial molybdenum oxide filter cake；
Reaction temperature is 75 DEG C~90 DEG C, the reaction time is 1h~2h；
The mass ratio of industrial molybdenum oxide and dust technology is 1:3；
The nocuousness such as alkali and alkaline earth metal ions and part copper, nickel, the iron in industrial molybdenum oxide can be removed by the technique
Impurity；
Step 1.2, the industrial molybdenum oxide filter cake obtained after step 1.1 and weak aqua ammonia are put into reaction kettle and carry out ammonia
Leaching leaches the foreign ions such as copper, zinc, nickel, iron in molybdate, enters solution with Multiple salts forms, adjust the temperature of reaction kettle to
70 DEG C, it is 8.5~9.0 that weak aqua ammonia to pH value of solution is added dropwise into mixed liquor, reacts 1h under conditions of temperature is 70 DEG C, i.e., free
Ammonia reaches certain value, draws supernatant liquor and send the storage clarification of ammonium molybdate storage tank；Then weak aqua ammonia is injected into reaction kettle again, is carried out
Secondary ammonia leaching adjusts the temperature of reaction kettle to 70 DEG C to improve metal leaching rate, and weak aqua ammonia is added dropwise into mixed liquor to pH value of solution
It is 8.5~9.0,1h is reacted under conditions of temperature is 70 DEG C, blowing filters after secondary ammonia leaching, and filter residue is ammonia leaching residue,
Obtained filtrate is returned into primary progress ammonia leaching, i.e., injects weak aqua ammonia into filtrate again, carries out ammonia leaching, adjust the temperature of reaction kettle
To 70 DEG C, it is 8.5~9.0 that weak aqua ammonia to pH value of solution is added dropwise into mixed liquor, reacts 1h under conditions of temperature is 70 DEG C later,
Blowing filters after ammonia soaks, and filter residue is ammonia leaching residue, and the filter residue that the leaching reaction of each ammonia obtains is mixed to get in this method
Ammonia leaching residue；
Step 2, the mixed raw material obtained after step 1 is added to the intracavitary carry out heating and thermal insulation of electric furnace, mixed raw material
It is heated and heats up under heat radiation effect, heating temperature is 100 DEG C~300 DEG C, and soaking time is 5min~10min, removes mixing
Moisture in raw material is being warming up to 1300 DEG C~1800 DEG C later, and is keeping the temperature 40min~110min, completes the smelting of mixed accessories
Refining, cooled to room temperature obtain ferro-molybdenum cake；
Step 3, ferro-molybdenum cake is crushed, Smelting High Speed Steel ferro-molybdenum can be obtained；
The granularity of ferro-molybdenum is between 10mm~100mm.
Method of the invention has the advantage that compared with prior art
1, the recovery rate of molybdenum is improved.On traditional molybdenum Metallurgical industry chain, usually using ammonia leaching residue as solid waste accumulate or
Cheap processing not only influences the loss that workshop health also causes molybdenum amount, and this method is using ammonia leaching residue as high speed
One of auxiliary material prepared by steel ferro-molybdenum, effectively makes it into molybdenum-iron by high temperature reduction for the molybdenum in ammonia leaching residue
In alloy, the use value of molybdenum in ammonia leaching residue is improved, on entire traditional molybdenum metallurgy chain, improves molybdenum
Recovery rate and resource utilization.
2, smelt molybdenum-iron controllable.Traditional molybdenum-iron is smelted usually using the hot perrin process completion of sial, and
This method temperature and reaction process after igniting are unable to control, and reaction temperature causes a large amount of energy to disappear at 2000 DEG C or more
Consumption and environmental pollution, and this method using electric furnace heat, can reach by adjusting temperature and time control molybdenum-iron smelting into
Journey, and then the optimized parameter that optimization molybdenum-iron is smelted, achieve energy-saving and emission reduction purposes.
3, it is greatly reduced and prepares high-speed steel ferro-molybdenum smelting cost.Traditional molybdenum-iron smelts the auxiliary material usually selected
Aluminium powder, ferrosilicon powder etc., unit cost is higher, and the raw material that this method has abandoned conventional method is chosen, and unit cost has been cast out
High auxiliary material makees reducing agent, greatly reduces ferro-molybdenum smelting cost, simultaneously because the carbon content in high-speed steel exists
Between 0.65%~1.75%, Smelting High Speed Steel (in traditional ferro-molybdenum carbon content of less demanding to carbon content in ferro-molybdenum
No more than 0.1%), therefore, selects carbon dust to make reducing agent in this method, reduce the smelting cost of ferro-molybdenum, increase molybdenum
Carbon content in ferroalloy productor.
Embodiment 1
A kind of preparation method of Smelting High Speed Steel ferro-molybdenum of the present invention, is specifically implemented according to the following steps:
Step 1, choosing amount containing molybdenum is the industrial molybdenum oxide raw material that 45%, granularity is not more than 3mm, and mass fraction is not less than
98.5%, granularity is not more than the ferric oxide powder of 1mm, and mass fraction is not more than the carbon of 0.5mm not less than 99.5%, granularity
Powder, the ammonia leaching residue of molybdenum content 12%, granularity no more than 5mm and mass fraction are not less than 98%, granularity no more than 0.5mm's
It is successively added in batch mixer according to mass ratio for 3.7:3.5:1.72:0.35:0.73 and is uniformly mixed, obtains by calcium oxide powder
To mixed raw material；
The revolving speed of batch mixer is 1000r/min, mixing time 20min；
The preparation method of ammonia leaching residue, specifically:
Step 1.1, industrial molybdenum oxide is put into progress pickling in reaction kettle with dust technology to react, is filtered, obtains later
To solid matter be industrial molybdenum oxide filter cake；
Reaction temperature is 75 DEG C, reaction time 1h；
The mass ratio of industrial molybdenum oxide and dust technology is 1:3；
Step 1.2, the industrial molybdenum oxide filter cake obtained after step 1.1 and weak aqua ammonia are put into reaction kettle and carry out ammonia
Leaching adjusts the temperature of reaction kettle to 70 DEG C, and it is 8.5~9.0 that weak aqua ammonia to pH value of solution is added dropwise into mixed liquor, is 70 DEG C in temperature
Under conditions of react 1h, i.e., free ammonia reaches certain value, draws supernatant liquor and send the storage clarification of ammonium molybdate storage tank；Then again to anti-
It answers and injects weak aqua ammonia in kettle, carry out secondary ammonia leaching, to improve metal leaching rate, adjust the temperature of reaction kettle to 70 DEG C, to mixing
It is 8.5~9.0 that weak aqua ammonia to pH value of solution is added dropwise in liquid, and 1h is reacted under conditions of temperature is 70 DEG C, is put after secondary ammonia leaching
Material filtering, filter residue is ammonia leaching residue, and obtained filtrate is returned to primary progress ammonia leaching, i.e., injects weak aqua ammonia into filtrate again, into
The leaching of row ammonia adjusts the temperature of reaction kettle to 70 DEG C, and it is 8.5~9.0 that weak aqua ammonia to pH value of solution is added dropwise into mixed liquor, later in temperature
Degree reacts 1h under conditions of being 70 DEG C, blowing filters after ammonia soaks, and filter residue is ammonia leaching residue, and the leaching reaction of each ammonia is obtained
Filter residue mixes to get the ammonia leaching residue in this method；
Step 2, the mixed raw material obtained after step 1 is added to the intracavitary carry out heating and thermal insulation of electric furnace, mixed raw material
It is heated and heats up under heat radiation effect, heating temperature is 200 DEG C, soaking time 10min, the moisture in mixed raw material is removed,
1450 DEG C are being warming up to later, and is keeping the temperature 50min, is completing the smelting of mixed accessories, cooled to room temperature obtains ferro-molybdenum
Cake；
Step 3, ferro-molybdenum cake is crushed, Smelting High Speed Steel ferro-molybdenum can be obtained；
The granularity of ferro-molybdenum is between 10mm~100mm.
Through detecting, the molybdenum-iron that mass fraction containing molybdenum is 50%, molybdenum content 52.46%, carbon content 4.37%, sulphur contains
Amount is 0.043%.
Embodiment 2
A kind of preparation method of Smelting High Speed Steel ferro-molybdenum of the present invention, is specifically implemented according to the following steps:
Step 1, choosing amount containing molybdenum is the industrial molybdenum oxide raw material that 50%, granularity is not more than 3mm, and mass fraction is not less than
98.5%, granularity is not more than the ferric oxide powder of 1mm, and mass fraction is not more than the carbon of 0.5mm not less than 99.5%, granularity
Powder, the ammonia leaching residue of molybdenum content 12%, granularity no more than 5mm and mass fraction are not less than 98%, granularity no more than 0.5mm's
Calcium oxide powder is successively added in batch mixer for 4:3.1:1.75:0.36:0.71 according to its mass ratio and is uniformly mixed, mixed
Close raw material；
The revolving speed of batch mixer is 960r/min, mixing time 20min；
Step 2, the mixed raw material obtained after step 1 is added to the intracavitary carry out heating and thermal insulation of electric furnace, mixed raw material
It is heated and heats up under heat radiation effect, heating temperature is 200 DEG C, soaking time 10min, the moisture in mixed raw material is removed,
1550 DEG C are being warming up to later, and is keeping the temperature 70min, is completing the smelting of mixed accessories, cooled to room temperature obtains ferro-molybdenum
Cake；
Step 3, ferro-molybdenum cake is crushed, Smelting High Speed Steel ferro-molybdenum can be obtained；
The granularity of ferro-molybdenum is between 10mm~100mm.
Through detecting, the molybdenum-iron that mass fraction containing molybdenum is 55%, molybdenum content 56.89%, carbon content 3.96%, sulphur contains
Amount is 0.062%.
Embodiment 3
A kind of preparation method of Smelting High Speed Steel ferro-molybdenum of the present invention, is specifically implemented according to the following steps:
Step 1, choosing amount containing molybdenum is the industrial molybdenum oxide raw material that 55%, granularity is not more than 3mm, and mass fraction is not less than
98.5%, granularity is not more than the ferric oxide powder of 1mm, and mass fraction is not more than the carbon of 0.5mm not less than 99.5%, granularity
Powder, the ammonia leaching residue of molybdenum content 12%, granularity no more than 5mm and mass fraction are not less than 98%, granularity no more than 0.5mm's
Calcium oxide powder is successively added in batch mixer for 4.4:2.8:1.76:0.37:0.7 according to its mass ratio and is uniformly mixed, mixed
Close raw material；
The revolving speed of batch mixer is 1000r/min, mixing time 20min；
Step 2, the mixed raw material obtained after step 1 is added to the intracavitary carry out heating and thermal insulation of electric furnace, mixed raw material
It is heated and heats up under heat radiation effect, heating temperature is 200 DEG C, soaking time 10min, the moisture in mixed raw material is removed,
1650 DEG C are being warming up to later, and is keeping the temperature 90min, is completing the smelting of mixed accessories, cooled to room temperature obtains ferro-molybdenum
Cake；
Step 3, ferro-molybdenum cake is crushed, Smelting High Speed Steel ferro-molybdenum can be obtained；
The granularity of ferro-molybdenum is between 10mm~100mm.
Through detecting, the molybdenum-iron that mass fraction containing molybdenum is 60%, molybdenum content 62.38%, carbon content 3.50%, sulphur contains
Amount is 0.058%.
Embodiment 4
A kind of preparation method of Smelting High Speed Steel ferro-molybdenum of the present invention, is specifically implemented according to the following steps:
Step 1, molybdenum oxide, fluffy powder, fluxing agent, reducing agent and the desulfurization for being 4.0:3:0.4:1.8:0.9 by mass ratio
Agent is added in batch mixer and is uniformly mixed, and obtains mixed raw material；
The revolving speed of batch mixer is 960r/min, mixing time 10min；
Molybdenum oxide is industrial molybdenum oxide, wherein molybdenum content 45%, granularity are not more than 3mm；
Fluffy powder is ferric oxide powder, and mass fraction is not less than 98.5%, and granularity is not more than 1mm；
Fluxing agent is ammonia leaching residue, and molybdenum content 10%, granularity is no more than 5mm；
Reducing agent is carbon dust, and mass fraction is not less than 99.5%, and granularity is not more than 0.5mm；
Desulfurizing agent is calcium oxide, and mass fraction is not less than 98%, and granularity is not more than 0.5mm；
Step 2, the mixed raw material obtained after step 1 is added to the intracavitary carry out heating and thermal insulation of electric furnace, mixed raw material
It is heated and heats up under heat radiation effect, heating temperature is 100 DEG C, soaking time 5min, the moisture in mixed raw material is removed, it
1300 DEG C are being warming up to afterwards, and is keeping the temperature 40min, is completing the smelting of mixed accessories, cooled to room temperature obtains ferro-molybdenum
Cake；
Step 3, ferro-molybdenum cake is crushed, Smelting High Speed Steel ferro-molybdenum can be obtained；
The granularity of ferro-molybdenum is between 10mm~100mm.
Embodiment 5
A kind of preparation method of Smelting High Speed Steel ferro-molybdenum of the present invention, is specifically implemented according to the following steps:
Step 1, molybdenum oxide, fluffy powder, fluxing agent, reducing agent and desulfurizing agent that mass ratio is 4.5:4:0.5:2:1 are added
Enter into batch mixer and be uniformly mixed, obtains mixed raw material；
The revolving speed of batch mixer is 1500r/min, mixing time 30min；
Molybdenum oxide is industrial molybdenum oxide, wherein molybdenum content 55%, granularity are not more than 3mm；
Fluffy powder is ferric oxide powder, and mass fraction is not less than 98.5%, and granularity is not more than 1mm；
Fluxing agent is ammonia leaching residue, and molybdenum content 30%, granularity is no more than 5mm；
Reducing agent is carbon dust, and mass fraction is not less than 99.5%, and granularity is not more than 0.5mm；
Desulfurizing agent is calcium oxide, and mass fraction is not less than 98%, and granularity is not more than 0.5mm；
Step 2, the mixed raw material obtained after step 1 is added to the intracavitary carry out heating and thermal insulation of electric furnace, mixed raw material
It is heated and heats up under heat radiation effect, heating temperature is 300 DEG C, soaking time 10min, the moisture in mixed raw material is removed,
1800 DEG C are being warming up to later, and is keeping the temperature 110min, is completing the smelting of mixed accessories, cooled to room temperature obtains molybdenum-iron conjunction
Golden cake；
Step 3, ferro-molybdenum cake is crushed, Smelting High Speed Steel ferro-molybdenum can be obtained；
The granularity of ferro-molybdenum is between 10mm~100mm.
The preparation method for being used to produce high-speed steel ferro-molybdenum of the invention is had using this method processing ferro-molybdenum
The ingredient cost that supplementary material can be greatly lowered, accurately controls and reduces ferro-molybdenum the duration of heat for shortening ferro-molybdenum
Smelting temperature improves resource utilization, while having refined the smelting process of ferro-molybdenum, improves the operating condition item at the scene of smelting
Part significantly reduces the production energy consumption of ferro-molybdenum, reduces flue gas during smelting bring environmental issue, has significant warp
Benefit of helping and social benefit.
Claims (5)
1. a kind of preparation method of Smelting High Speed Steel ferro-molybdenum, which is characterized in that be specifically implemented according to the following steps:
Step 1, it is 3.5~4.5:2.5~4:0.3~0.5:1.5~2:0.7~1 molybdenum oxide by mass ratio, fluffy powder, helps
Flux, reducing agent and desulfurizing agent are added in batch mixer and are uniformly mixed, and obtain mixed raw material；
Step 2, the mixed raw material obtained after step 1 is added to the intracavitary carry out heating and thermal insulation of electric furnace, heating temperature 100
DEG C~300 DEG C, soaking time is 5min~10min, removes the moisture in mixed raw material, is being warming up to 1300 DEG C~1800 later
DEG C, and 40min~110min is kept the temperature, the smelting of mixed accessories is completed, cooled to room temperature obtains ferro-molybdenum cake；
Step 3, ferro-molybdenum cake is crushed, Smelting High Speed Steel ferro-molybdenum can be obtained.
2. a kind of preparation method of Smelting High Speed Steel ferro-molybdenum according to claim 1, which is characterized in that the step
In rapid 1, the revolving speed of batch mixer is 960r/min~1500r/min, and mixing time is 10min~30min.
3. a kind of preparation method of Smelting High Speed Steel ferro-molybdenum according to claim 1, which is characterized in that the step
In rapid 1, molybdenum oxide is industrial molybdenum oxide, and molybdenum content is 45%~55%, and granularity is not more than 3mm；Fluffy powder is di-iron trioxide
Powder, mass fraction are not less than 98.5%, and granularity is not more than 1mm；Fluxing agent is ammonia leaching residue, and molybdenum content is 10%~30%,
Granularity is not more than 5mm；Reducing agent is carbon dust, and mass fraction is not less than 99.5%, and granularity is not more than 0.5mm；Desulfurizing agent is oxygen
Change calcium, mass fraction is not less than 98%, and granularity is not more than 0.5mm.
4. a kind of preparation method of Smelting High Speed Steel ferro-molybdenum according to claim 3, which is characterized in that the ammonia
The preparation method of phase analysis, specifically:
Step 1.1, industrial molybdenum oxide is put into progress pickling in reaction kettle with dust technology to react, is filtered, obtains later
Solid matter is industrial molybdenum oxide filter cake；
Reaction temperature is 75 DEG C~90 DEG C, the reaction time is 1h~2h；
The mass ratio of industrial molybdenum oxide and dust technology is 1:3；
Step 1.2, the industrial molybdenum oxide filter cake obtained after step 1.1 and weak aqua ammonia are put into progress ammonia leaching in reaction kettle, adjusted
The temperature of reaction kettle is saved to 70 DEG C, it is 8.5~9.0 that weak aqua ammonia to pH value of solution is added dropwise into mixed liquor, the item for being 70 DEG C in temperature
1h is reacted under part, i.e. free ammonia reaches certain value, draws supernatant liquor and send the storage clarification of ammonium molybdate storage tank；Then again to reaction kettle
Middle injection weak aqua ammonia carries out secondary ammonia leaching, to improve metal leaching rate, adjusts the temperature of reaction kettle to 70 DEG C, into mixed liquor
It is 8.5~9.0 that weak aqua ammonia to pH value of solution, which is added dropwise, and 1h, blowing mistake after secondary ammonia leaching are reacted under conditions of temperature is 70 DEG C
Filter, filter residue is ammonia leaching residue, and obtained filtrate is returned to primary progress ammonia leaching, i.e., injects weak aqua ammonia into filtrate again and carries out ammonia
Leaching adjusts the temperature of reaction kettle to 70 DEG C, and it is 8.5~9.0 that weak aqua ammonia to pH value of solution is added dropwise into mixed liquor, is in temperature later
1h is reacted under conditions of 70 DEG C, blowing filters after ammonia soaks, and filter residue is ammonia leaching residue, the filter residue that the leaching reaction of each ammonia is obtained
Mixing, can be obtained ammonia leaching residue.
5. a kind of preparation method of Smelting High Speed Steel ferro-molybdenum according to claim 1, which is characterized in that the step
In rapid 3, the granularity of ferro-molybdenum is between 10mm~100mm.
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